518432 A7 B7 ♦ 經濟部智慧財產局員工消費合作社印製 五、發明說明（i ) [發明所屬技術領域] 本發明係有關照明攜帶型個人電腦或導航裝置等之畫 像顯不板之面光源裝置及具備該面光源裝置之畫像顯示裝 置。 [習知之技術] 如一般所周知，輸出具有平面式擴散之照明光之光源 裝置，係稱為面光源裝置，而廣為畫像顯示板之照明設備 等所使用。例如，對於攜帶型個人電腦或導航裝置等之液 晶顯示板（畫像顯示板）提供面光源裝置之輸出照明光，而 在液晶顯示板上裝設畫像顯示型之畫像顯示裝置，已成為 慣例。 第7圖係例亦有，此型之畫像顯示裝置（液晶顯示裝 置）60。如該圖所示，畫像顯示裝置60，做為照明光供給 手段而設有面光源裝置61。面光源裝置61，其係具備，導 光板62、配置成與其側端面（輔助面所提供之入射端面）63 形成相面向之螢光燈（一次光源）64，與，配置於導光板62 之下面（一方之主面提供之背面）62a側由白色PET形成之 反射板65、配置於導光板62之上面（他方之主面提供之出 射面）62b側之稜鏡板66，以及配置成將螢光燈64由背後 狀似圍住之反光板67。 螢光燈64點燈，則光透過導光板62之入射端面63 導入導光板62之内部。此光在導光板62之上面62b與下 面62a之間反覆反射面在導光板62之内部傳播。在此過程 中，對上面62b或下面62a之内部入射時，具有臨界角以 --------------裝--- (請先閱讀背面之注意事項再填寫本頁) 訂- •線· 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 1 311791 經濟部智慧財產局員工消費合作社印製 518432 A7 〜~ ------B7 _ 五、發明綱（2 ) ^' S' -- 下之入射角之光之一部分，將逸出導光板62之外部。 八一方面，由導光板62之下面62a側之逸出光之大部 刀，由白色PET所形成之反射板65散射而再射入導光板 62之内部。再射人之光，再度傳播於導光板62内’等待 成為由上面62b之逸出光（出射光）之機會。再射入之光， 射入上面62b之内部時，若有臨界角以下之入射角時其 一部分則成為由上面62b之出射光。 如此，該由種種之經路履歷而形成具有平面式擴散之 出射光（由上部表面62b之逸出光如周知，此出射光之 主要傳播方向，相當傾向於前方。稜鏡板66將其修正到液 晶顯示板68側，相對於液晶顯示板68大致由垂直方向供 給照明光。 " 在此’需要注意的是，如第7圖所示，經由入射端面 側與導光板之背面會合之邊緣（以下亦稱為「下邊緣」）7〇 進入導光板62内之光Η之存在。此光η,係如第8圖（a)、 (b)所示’在稜鏡板66之輸出面（上面）66a產生筋狀之亮線 71。冗線71，在入射端面63之近傍，係與入射端面63大 致平行而出現。此現象亦稱為「邊緣之映射」。 顯然，邊緣之映射（亮線7 1)所形成之亮度不均勻，將 使面光源裝置6 1之照明輸出光之品質顯著降低，適用於液 晶顯示板68之照明時，液晶顯示板68之畫像，將難於看 清。 因而，本發明之申請人，先前已有如第9圖所示之方 法以解決問題之提案（特開平1〇_112214號公報）。該提案 «裝-----·—---訂------I--- (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格釐 2 311791 518432 Φ 經濟部智慧財產局員工消費合作社印製 A7 五、發明說明（3 ) 之要點’係將沿導光板62之下面配置之反射板65之前端， 越過下邊緣70而突出於螢光燈64側之點。由此動作，以 反射板65遮蔽欲經由邊緣7〇進入導光板62内部之光Η， 抑制亮線之發生。 然而’近年來，對於使用在畫像顯示裝置（液晶顯示裝 置）60之面光源裝置61，使液晶顯示板68上之畫面儘量明 亮清晰之要求越來越強。因而，替代習知之具有白色表面 之反光板，而使用其内側面（反射面）形成銀之被膜層之反 光板67之情形越來越多。這是由於銀色之反射面，較白色 反射面可獲得高光反射率之緣故。 但疋’在此情形適用上述提案之技術，則因反射板65 係由白色PET板所形成，所以，反射板65突出部之白色 反射面之光反射率，將較反光板67之銀色反射面之光反射 率為低。結果，經由使用具有銀色反射面之反光板67所獲 得之亮度上昇效果將被減殺。 [發明之目的及概述] 因此，本發明之目的之一，在於提供一種根據上述提 案之技術，用以防止邊緣之映射（亮線之產生）；及防止具 有銀色反射面之反光板所形成之亮度上昇效果不致於被減 殺，所改良之面光源裝置。 又，本發明之另一目的，係在於提供一種使用經過如 此改良之面光源裝置而可獲得明亮清晰顯示畫面之畫像顯 示裝置。 本發明係一種具備有由各主要面所提供之出射面及背 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 311791 ------------------·—---訂---------- (請先閱讀背面之注意事項再填寫本頁) 518432 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明（4 ) 面’由輔助面所提供之入射端面之導光板、面向入射端面 配置之一次光源、具有將一次光源之光反射並導入上述入 射端面之銀色反射面之反光板及具備沿導光板之背面配置 以將由背面所逸出之光反射之面光源裝置，以及，使用該 面光源裝置做為畫像顯示板之畫像顯示裝置所適用。 按本發明之特徵，反射板超越下邊緣（入射端面與導光 板之背面相會之邊緣）而設有突出於一次光源側之突出部 。然後而此突出部係在一次光源側之面備有銀色之反射 層。 由於如此之構成，使因使用具有銀色反射面之反光板 所獲得之亮度上昇效果不致於被減殺，可防止邊緣之映射 之產生。 此處之反光板，例如以金屬板形成。而且，亦可設有 容納導光板、一次光源、反光板及反射板之框架。此時， 反光板固定於框架形成具有框架之樑零件功能之架構， 且，反光板之基部則形成具有支持反射板及導光板之支 板零件之功能之架構為佳。 如此，則，反光板不僅成為光學零件，亦可作為機械 的構造零件而活用。 [實施例] 览1實施你丨 以下參.照第1至第3圖，說明有關本發明之第J實施 例之面光源裝置。第丨圖係顯示將其全體以符號1表示之 面光源裝置之分解斜視圖。又，第2圖係顯示第1圖甲沿 ‘紙張尺度適用中國國家標準（CNS)A4規格（21Q X 297公爱丁 311791 (請先閱讀背面之注意事項再填寫本頁) «裝 --·1---t------------ φ, 518432 經 濟 部 智 慧 財 產 局 消 費 合 作 社 印 製 5 A7 B7 五、發明說明（5 ) A-A線剖開之剖視圖。第3圖係顯示關於第2圖所示之剖 視構造之1次光源之周邊放大圖。 首先，於第1圖、第2圖之中，符號Z為大致長方形 狀之框架’在此框架2内依序重疊收容有反射板3、導光 板4及稜鏡板5 〇 面向導光板4 一側之側端面（入射端面）6側，配置有榮 光燈（1次光源）7。螢光燈7係收容於固定在框架2之金屬 製反光板（反射零件）8内。反光板8由背後圍住螢光燈7， 僅留取光開口。 框架2係以白色合成樹脂之射出成形體，而在其—側 之端部E1上固定有上述金屬製反光板8。另一側之端部 E2則固定有與反光板8相面向之金屬製支持板。 而且’框架2係具備有：用以固定反光板8之第1邊 11，與第1邊11之另一側之端部形成大致正交之第2逢 12，與上述第丨邊n另一側之端部形成大致正交之第3 邊13,及與此等第2邊12及第3邊13形成大致正交之第 4邊14。第2邊12與第3邊13之内側，形成有用以支持 反射板3之下面3a之舌片15、15。 、 然後，第1邊11兩端部，形成有！對反光板固定 16 〇 第4邊14之兩端部形成丨對支持板固定部1 7，然後， 框架2之上部周緣則形成用以收容液晶顯示板（畫像顯示 板）1 8一之板扣合冑2〇。在此板扣合部2〇收容液晶冑示板（畫 {象，顯# fe )1 8二藉由將此液晶顯示板1 §組配於框架2，而 本紙i度適财_ χ视公着「 ’、 311791 ^--------^---------^ (請先閱讀背面之注意事項再填寫本頁) 518432518432 A7 B7 ♦ Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (i) [Technical Field of the Invention] The present invention relates to a surface light source device that displays an image of a portable personal computer or navigation device, etc. An image display device including the surface light source device. [Known Technology] As is generally known, a light source device that outputs a planar-type diffused illuminating light is called a surface light source device, and is widely used for lighting equipment such as an image display panel. For example, a liquid crystal display panel (image display panel) such as a portable personal computer or a navigation device provides output illumination light from a surface light source device, and it is common practice to install a portrait display type image display device on a liquid crystal display panel. Fig. 7 also shows an example. This type of image display device (liquid crystal display device) 60. As shown in the figure, the image display device 60 is provided with a surface light source device 61 as a means for supplying illumination light. The surface light source device 61 includes a light guide plate 62, a fluorescent lamp (primary light source) 64 disposed so as to face the side end surface (incident end surface provided by the auxiliary surface) 63, and disposed below the light guide plate 62. (Back surface provided by one main surface) A reflecting plate 65 made of white PET on the 62a side, a light plate 66 disposed on the light guide plate 62 (the exit surface provided by the other main surface), and a phosphor plate 66 disposed on the 62b side The lamp 64 is surrounded by a reflector 67 which is surrounded by the back. When the fluorescent lamp 64 is turned on, light passes through the incident end face 63 of the light guide plate 62 and is introduced into the light guide plate 62. This light repeatedly propagates inside the light guide plate 62 between the upper surface 62b and the lower surface 62a of the light guide plate 62. In this process, when entering the inside of the upper 62b or the lower 62a, the critical angle is set with -------------- install --- (Please read the precautions on the back before filling this page ) Order-• Line · This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 1 311791 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 518432 A7 ~~ ------ B7 _ 5 2. Outline of Invention (2) ^ 'S'-A part of the light at the angle of incidence below will escape outside the light guide plate 62. On the one hand, most of the light emitted from the side of the lower surface 62a of the light guide plate 62 is scattered by the reflection plate 65 formed of white PET, and then enters the inside of the light guide plate 62. The light emitted again is propagated again in the light guide plate 62 'and waits for an opportunity to escape from the upper surface 62b. When the incident light enters the inside of the upper surface 62b, if there is an incident angle below the critical angle, a part of the incident light becomes the outgoing light from the upper surface 62b. In this way, the exit light with a planar diffusion is formed from various path histories (the escape light from the upper surface 62b is well known, and the main propagation direction of this exit light is quite inclined to the front. The fascia 66 corrects it to The liquid crystal display panel 68 side supplies the illumination light in a vertical direction relative to the liquid crystal display panel 68. " It should be noted here that, as shown in FIG. 7, the edge that meets the back surface of the light guide plate via the incident end surface side ( (Hereinafter also referred to as the "lower edge") 70. The existence of the light beam entering the light guide plate 62. This light η is shown on the output surface of the cymbal plate 66 (above as shown in Figs. 8 (a) and (b)). 66a produces a streaky bright line 71. The redundant line 71 appears near the incident end face 63 in parallel with the incident end face 63. This phenomenon is also called "edge mapping". Obviously, the edge mapping (bright line 7 1) The uneven brightness formed will significantly reduce the quality of the illuminating output light of the surface light source device 61, and when applied to the illumination of the liquid crystal display panel 68, the image of the liquid crystal display panel 68 will be difficult to see. Therefore, Applicant of the present invention, previously There has been a proposal to solve the problem as shown in Fig. 9 (Japanese Patent Application Laid-Open No. 10_112214). This proposal is «installation ----- · —--- subscription ------ I --- (Please read the precautions on the back before filling this page) This paper size is applicable to Chinese National Standard (CNS) A4 specification 2 311791 518432 Φ Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Summary of the invention (3) 'It is a point that will protrude along the front end of the reflection plate 65 disposed below the light guide plate 62 and over the lower edge 70 to protrude beyond the fluorescent light 64 side. With this action, the reflection plate 65 shields the light guide plate 62 that is intended to pass through the edge 70. The internal light is suppressed to suppress the occurrence of bright lines. However, in recent years, there has been an increasing demand for a surface light source device 61 used in an image display device (liquid crystal display device) 60 to make the picture on the liquid crystal display panel 68 as bright and clear as possible. Therefore, instead of the conventional reflective plate with a white surface, the use of a reflective plate 67 with a silver coating on its inner side (reflecting surface) is increasing. This is because the silver reflective surface is more reflective than white High light reflectance Therefore, if the technology of the above proposal is applied in this case, since the reflection plate 65 is formed of a white PET plate, the light reflectance of the white reflection surface of the projection portion of the reflection plate 65 will be silverer than that of the reflection plate 67. The light reflectance of the reflecting surface is low. As a result, the brightness increasing effect obtained by using the reflecting plate 67 having a silver reflecting surface will be reduced. [Objective and Summary of the Invention] Therefore, one of the objects of the present invention is to provide a According to the above-mentioned proposed technology, it is used to prevent the mapping of edges (the generation of bright lines); and to prevent the brightness increase effect formed by the reflective plate with a silver reflecting surface from being reduced, and the improved surface light source device is improved. Another object is to provide an image display device which can obtain a bright and clear display screen by using the surface light source device thus improved. The present invention is provided with a paper surface provided by each main surface and a paper size applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) 311791 ------------- ----- · —--- Order ---------- (Please read the notes on the back before filling out this page) 518432 A7 B7 Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Explanation (4) Plane 'light guide plate with incident end face provided by the auxiliary surface, a primary light source arranged facing the incident end face, a light reflector with a silver reflecting surface reflecting the light from the primary light source and introduced into the incident end face, and a light guide plate The rear surface configuration is applicable to a surface light source device that reflects light emitted from the rear surface, and an image display device using the surface light source device as an image display panel. According to a feature of the present invention, the reflecting plate extends beyond the lower edge (the edge where the incident end surface meets the back surface of the light guide plate) and is provided with a protruding portion protruding from the primary light source side. Then, the protruding portion is provided with a silver reflective layer on the surface of the primary light source side. Due to this structure, the brightness increase effect obtained by using a reflective plate having a silver reflecting surface is not reduced, and the occurrence of edge mapping can be prevented. The reflective plate here is formed of, for example, a metal plate. In addition, a frame for accommodating a light guide plate, a primary light source, a reflective plate, and a reflective plate may be provided. At this time, the reflecting plate is fixed to the frame to form a structure having the function of a beam part of the frame, and the base of the reflecting plate is formed to have a structure having a function of supporting a supporting plate part of the reflecting plate and the light guide plate. In this way, the reflector can be used not only as an optical component but also as a structural component of a machine. [Embodiment] The first embodiment is described below. With reference to Figs. 1 to 3, a surface light source device according to a Jth embodiment of the present invention will be described. FIG. 丨 is an exploded perspective view of the surface light source device whose whole is indicated by the symbol 1. FIG. In addition, Figure 2 shows that Figure A applies the Chinese National Standard (CNS) A4 specification along the paper scale (21Q X 297 male Eding 311791 (please read the precautions on the back before filling out this page) «Packing-- · 1 --- t ------------ φ, 518432 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5 A7 B7 V. Description of the invention (5) AA line sectioned view. Figure 3 shows An enlarged view of the periphery of the primary light source with respect to the cross-sectional structure shown in Fig. 2 is shown. First, in Figs. 1 and 2, the frame in which the symbol Z is a substantially rectangular shape is sequentially superimposed in this frame 2. The reflecting plate 3, the light guide plate 4, and the fascia plate 50 are housed. The side end face (incident end face) 6 side of one side of the light guide plate 4 is provided with a glare lamp (primary light source) 7. The fluorescent lamp 7 is housed and fixed in the Inside the metal reflector (reflecting part) 8 of the frame 2. The reflector 8 surrounds the fluorescent lamp 7 from the back, leaving only the light opening. The frame 2 is an injection molded body made of white synthetic resin, and on its side The metal reflector 8 is fixed to the end E1, and the gold facing the reflector 8 is fixed to the other end E2. Moreover, the 'frame 2 is provided with: the first side 11 for fixing the reflector 8 and the second side 12 which is substantially orthogonal to the end portion of the other side of the first side 11 and the above-mentioned section 丨An end portion on the other side of the side n forms a substantially orthogonal third side 13 and the second side 12 and the third side 13 form a substantially orthogonal fourth side 14. The second side 12 and the third side 13 On the inner side, tongues 15 and 15 are formed to support the lower surface 3a of the reflecting plate 3. Then, the two ends of the first side 11 are formed! Fixing the reflecting plate 16 〇 Both ends of the fourth side 14 are formed 丨A support plate fixing portion 17 is formed, and then, a peripheral plate edge of the upper portion of the frame 2 is formed to receive a liquid crystal display panel (portrait display plate) 18, which is a plate fastener 20. Here, the plate fastener portion 20 receives liquid crystal. Display board (painting {象 ， 显 # fe) 1 8 2 By assembling this liquid crystal display panel 1 § to frame 2, and this paper is suitable for wealth _ χ See the public "", 311791 ^ ------ -^ --------- ^ (Please read the notes on the back before filling this page) 518432
五、發明說明（6 ) 構成畫像顯示裝置。且’ h 此框架2之下面側，分別形成有 扣合於反光板8之第1軋人 ^ ± A 丄 夺〇部21，與扣合於支持板1〇之 第2扣合部22。 反光部8，係由不鍤麵 卜％綱或鋁合金等金屬板所形成，其 内面全面形成銀反射層c τ Α ’、 曰“（參照第3圖）。反光板8，係由 以螺栓24, 24固定在框架2之第！邊u側之反光板固定 部16, 16之基部25,與由此基部25豎立之豎立壁部26, 與由此豎立壁部26往導光板4側折曲與基部25大致平行 之凸緣部（鍔部：凸緣狀之部分。以下相同）27所構成。 下方之基部25 ’係形成較上方之凸緣部27為長，且 捃接於反射板3之下面3a側，使能穩定支持反射板3、導 光板4及稜鏡板5之一端側。 一方面，上方之凸緣部27，係具有用以支持液晶顯示 板18旁面側之板支持面部分，與由此板支持面部分2?a 折曲形成之導光板押壓部分27b。此導光板押壓部分27b， 係位於導光板4之上面（出射面）28側之位置。 如此構成之反光板8，係藉由固定於框架2上，其基 部25不但有作為樑零件之功能，且亦有作為支持反射板 3、導光板4及稜鏡板5之支持板零件之功能。總之，反光 板8亦可作為補強框架2之零件之功能。 因而，框架2可易於獲得因反光板8所補強之分而薄 型化·小型化。而且，反光板8，係因可以基部25與凸緣 部27扶持反射板3及導光板4，所以不需在框架2側形成 用以扶持反射板3及導光板4之部分。此事亦使框架2之 (請先閱讀背面之注意事項再填寫本頁) « n ϋ βϋ I «an n 訂-------- 經濟部智慧財產局員工消費合作社印製 本紙張尺度適標準（CNS)A4規格咖x视公釐） 6 311791 518432 A7V. Description of the invention (6) A portrait display device is constituted. And, 'h', the lower side of the frame 2 is formed with a first rolling part 21 fastened to the reflective plate 8 and a second fastening part 22 fastened to the supporting plate 10 respectively. The reflecting portion 8 is formed of a metal plate such as a non-steel sheet or aluminum alloy, and a silver reflecting layer c τ ′ ′ is formed on the inner surface of the reflecting portion 8 (refer to FIG. 3). The reflecting plate 8 is formed by bolts. 24, 24 are fixed to the second of the frame 2! The base 25 of the reflector fixing portions 16, 16 on the u side, and the upright wall portion 26 erected from the base 25, and the upright wall portion 26 is folded toward the light guide plate 4 side. The flange portion (the flange portion: a flange-shaped portion. The same applies hereinafter) 27 is substantially parallel to the base portion 25. The lower base portion 25 'is longer than the upper flange portion 27 and is connected to the reflecting plate. The lower 3a side of 3 enables stable support of one end side of the reflection plate 3, the light guide plate 4, and the fascia plate 5. On the one hand, the upper flange portion 27 has a plate support for supporting the side of the liquid crystal display panel 18 The surface guide portion and the light guide plate pressing portion 27b formed by bending the plate supporting surface portion 2? A. The light guide plate pressing portion 27b is located on the upper side (the exit surface) 28 side of the light guide plate 4. This structure The reflector 8 is fixed to the frame 2 and its base 25 not only functions as a beam part, but also It has the function of supporting plate parts supporting the reflection plate 3, the light guide plate 4, and the fascia plate 5. In short, the reflecting plate 8 can also serve as a component for reinforcing the frame 2. Therefore, the frame 2 can easily be reinforced by the reflecting plate 8. The reflector 8 can support the reflective plate 3 and the light guide plate 4 by the base portion 25 and the flange portion 27, so it is not necessary to form the reflective plate 8 on the frame 2 side to support the reflective plate 3 and the light guide plate. Part of the light board 4. This matter also makes the frame 2 (please read the precautions on the back before filling this page) «n ϋ βϋ I« an n Order -------- Staff Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed paper size standard (CNS) A4 size coffee x mm) 6 311791 518432 A7
五、發明說明C 薄型化•小型化成為容易。 (請先閱讀背面之注意事項再填寫本頁) 再者’反光板8之基部25與凸緣部27，係以微小之 間隙扶持’反射板3及導光板4，或以規定之彈力扶持。 反光板8之基部25與凸緣部27,以規定彈力扶持反射板3 及導光板4時，則下邊緣3〇以反光板8之彈力與導光板4 及稜鏡板5之重量被押壓於反射板3。 而且，反光板8之基部25與凸緣部27，以微小間隙 扶持反射板3及導光板4時，則下邊緣30以導光板4及稜 鏡板5之重量，被押壓於反射板3。 支持板10，係與反光板8 —樣，以不銹鋼或鋁合金等 金屬板形成剖面大致L字形狀（參照第1圖）。然後，支持 板10，係以螺栓3 1、3 1固定於框架2之第4邊14側之支 持板固定部17、17。 而且’支持板10’具有固定於支持板固定部17以支 持反射板3之下面3a側之基部32，與由此基部32豎立與 第4邊14之外侧扣合之背板部33,並與框架2之第4邊 14 一體化而補強框架2。此事亦與上述反光板8之補強功 能相同，可使框架2之薄型化•小型化成為容易。 反射板3,除了後述之反射層之外’均為白色板 所形成。其尺寸為可收容於框架2内，且，可提供超越 光板4之入射面6(下邊緣30)而突出於螢光燈7側之^突 部34之設計。 犬出 此處重要之事係為突出部34之内侧面(一次光源侧之 面至上面）3b，形成銀反射層35(參昭第】闯 |______ 、、 圖至第3圖）。本 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱）5. Description of the invention C Thinning and miniaturization becomes easy. (Please read the precautions on the back before filling in this page.) Furthermore, the base 25 and flange 27 of the reflector plate 8 support the reflector plate 3 and the light guide plate 4 with a small gap, or the prescribed elastic force. When the base portion 25 and the flange portion 27 of the reflective plate 8 support the reflective plate 3 and the light guide plate 4 with a predetermined elastic force, the lower edge 30 is pressed against the elastic force of the reflective plate 8 and the weight of the light guide plate 4 and the cymbal plate 5 Reflective plate 3. In addition, when the base portion 25 and the flange portion 27 of the reflecting plate 8 support the reflecting plate 3 and the light guide plate 4 with a slight gap, the lower edge 30 is pressed against the reflecting plate 3 by the weight of the light guide plate 4 and the prism plate 5. The support plate 10 is similar to the reflective plate 8 and is formed into a substantially L-shaped cross section by using a metal plate such as stainless steel or aluminum alloy (see FIG. 1). Then, the support plate 10 is fixed to the support plate fixing portions 17, 17 on the fourth side 14 side of the frame 2 with bolts 31, 31. Further, the 'support plate 10' has a base portion 32 fixed to the support plate fixing portion 17 to support the lower surface 3a side of the reflection plate 3, and a back plate portion 33 which is erected from this base portion 32 to engage with the outer side of the fourth side 14, and The fourth side 14 of frame 2 is integrated to reinforce frame 2. This is the same as the reinforcing function of the reflector 8 described above, and it is possible to make the frame 2 thinner and smaller. The reflection plate 3 is formed of a white plate except for a reflection layer described later. Its size can be accommodated in the frame 2, and it can provide a design that protrudes beyond the incident surface 6 (lower edge 30) of the light plate 4 and protrudes beyond the fluorescent lamp 7 side. The important thing here is that the inner side of the protruding portion 34 (the surface from the primary light source side to the upper side) 3b forms the silver reflective layer 35 (see Figure 1 to Figure 3). This paper size applies to China National Standard (CNS) A4 (210 X 297 public love)
7 3II79J 518432 A7 B7 五、發明說明（8 ) 實施例之反射板3之突出部34長度L為丨至2mm，而銀 反射層35係形成在其全長。 此外’在反射板3面向導光板4之面（反射面之全 域，形成銀之反射層35亦有可能。但，如此則會產生出射 光之受度咼之反面產生閃爍感，以致顯示畫面不清晰之新 問題。因此，在反射板3之全域形成銀反射層35並不理想。 導光板4係為丙稀酸樹脂等合成樹脂之射出成形體， 上面（出射面）28為大致長方形，而剖面形狀大致為楔形形 狀。螢光燈7則配置在肉厚側。 另外，將導光板4之入射端面6粗面化，以調整入射 端面6近傍之出射光量，做為抑制映入之一助亦可。在導 光板4之上面28或下面37，選擇性地付著光擴散性之油 墨（例如，以碳酸鎂、氧化鈦等為顏料之油墨），或部分性 地形成粗糙面，使光適度擴散以調整出射強度之分布亦 可° 稜鏡板5’係以聚碳酸酯等透光性之板材所形成，而 在與導光板4相面向之面（下面）形成具有剖面大致三角形 之多數稜鏡列之稜鏡面38。稜鏡板5之配向為，此等稜鏡 列與入射端面6大致為平行延伸之定位。 如周知，如此配置之稜鏡板5，具有修正導光板4之 上面28斜向射出之光之進行方向，使轉向液晶顯示板 形成有效照射之作用。 如上述構成之面光源裝置41之中，光之經路大致如 T。螢光燈7點燈’則大部分之光通過反光板8之開口部 本...氏張尺二適用中國國家標準（CNS)A4規格（21〇 X 297公爱) -—^ -— 8 311791 (請先閱讀背面之注意事項再填寫本頁) ，裝 mm I I— mamme w ¥ fl I HI n ϋ I eat < 經 濟 部 智 慧 財 產 局 員 工 消 費 合 作 社 印 製 518432 .A7 五、發明說明<9 ) (請先閱讀背面之注意事項再填寫本頁) 直接到達入射端面6。又，由螢光燈7所放出光之一部分， 經銀色之反光板8之反射面反射後到達入射端面6，其他 一部分則由反射板3之突出部34之銀色反射層35反射後 到達入射端面6。 在此處重要之事為，在突出部34之銀色之反射層35 之反射，其中亦與經由銀色反光板8之反射一樣之高反射 率進行，所以可避免經由突出部34到達入射端面6之光之 減衰。換言之，銀色反光板8之有效反射效果（對於導光板 之有效率之光供給，與根據於此之高亮度化），即使在反射 板3設置突出部34亦不受到阻礙。當然，此亦為在突出部 34形成銀色反射層35之功效。 由入射端面ό導入導光板4内部之光，在上面28與下 面37之間反覆反射而在導光板4之内部傳播。在其過程 中，對上面28或下面37之内部入射時，具有臨界角以下 之入射角之光之一部分，逸出導光板4之外部。 經濟部智慧財產局員工消費合作社印製 一方面，由下面側之逸出光之大部分’在反射板3之 内側面散射而再入射於導光板4之内部。再入射之光，係 再度傳播於導光板4内，並等待成為由上自28之逸出光= 射光）之機會。再入射光入射於之内部時入 為臨界角以下，則其一部分將成為由上面Μ之出射光。 如此，經由種種之經路過程，而目 而具有平面式擴散之屮 射光ρ8(由上面28之逸出光）於是生成。 取如周知’此出射伞 之主要傳播方向係相當前傾於前方。 九 稷鏡板5將其修芥μ 液晶顯示板（畫像顯示板）1 8側，而對於 — "^ — 日日暴頁不；^ 1 8女 私紙張尺度_中國國家標準（CNS)A4規格（21q x 297公复1 — 八 9 311791 518432 A7 B7 五、發明說明（10 / 由垂直方向供給照明光。 又’如於習知技術之項已有說明，一部分之光如第3 圖中以符號Η所示，欲經由下邊緣3〇進入導光板4内。 如既述，若此光Η強，則在稜鏡板5之輸出面（上面）生成 筋狀之亮線（映入）。 本實施例可防止如此因映入而生成之亮度不均勻。因 為，反射板3具有超越邊緣30而延伸之突出部34,所以， 鉍由下邊緣30欲進入導光板4内之光Η之大部分被鎖住。 亦即’螢光燈7之光到了邊緣3〇之後，已被反射板3之突 出部34物理性遮蔽。隨之，成為映入之原因之光η 弱。 同時，如上所述，#由在突出部34形成銀色反射層 35,使用銀色之反光板8之利點（對於導光板之有效率之光 供給及因而所得到之高亮度化）不致被減損而可維持。實現 如此良好之狀況，為本發明基本且最大之特徵。 當然，本實施例之面光源裝置i之如此之優點，將反 映於裝配有該面光源裝置之畫像顯示裝置。 亦即，映射已被抑制之輸出照明光有效率供給於液晶 顯示板!8’成為可進行明亮清晰之高品位之晝像顯示。； 像顯不裝置’係成為液晶顯示板18以無亮線之高亮度出射 光均勾照明，較習知例為明亮鮮明之高品位之晝像顯 為可能。 呈丄复施例 ^次’參照第4圖至第6圖，說明本發明之第2實施 本紙張尺^iiVia家標準（CN^4規格⑵Q χ撕 311791 (請先閱讀背面之注意事項再填寫本頁) (1裝-----r---訂-------t'----4 經 濟 部 智 慧 財 產 局 員 工 消 費 合 社 印 製 10 518432 A7 B7 五、發明說明（U ) 例有關面光源裝置。第4圖中，將全體以符號4 i指示之第 2實施例之面光源裝置，以與第1圖相同之斜視圖顯示。 第5圖係顯示第4圖中沿B-B線之面光源裝置重要部分之 剖面。又，第6圖為，顯示本實施例採用之反射板突出部 俯視圖。 此外，在第1實施例所使用之符號，儘可能共同使用。 且，與第1實施例共同之部分構成或其作用等儘量省略反 覆之說明。 參照此等之圖，則在大致長方形之框架42之中，將反 射板3、導光板4及稜鏡板5依序重疊收容。與導光板4 一方之側端面（入射端面）6側相面向，配置有螢光燈（一次 光源）7。螢光燈7之兩端部，係以裝卸自如之狀態固定於 框架42之框體43。且，螢光燈7係以反光板44由背後圍 住，以反光板44將螢光燈7之光反射導入入射面6。 框架42為白色合成樹脂之射出成形體，係具備有大致 長方形之框體43，與將反射板3等由下方支持之外凸部 45、46，與以螺栓48、48固定於框體43之上面側之缺口 部47之板零件50。 框體43及板零件50之上面側形成用以扣合液晶顯示 板（畫像顯不板）1 8之板扣合部51a、51b。 在此板扣合部51a、51b收容液晶顯示板（畫像顯示 板）18’藉由將液晶顯示板18組配於框架42，構成畫像顯 示裝置55。7 3II79J 518432 A7 B7 V. Description of the invention (8) The length L of the protrusion 34 of the reflection plate 3 of the embodiment is 丨 to 2 mm, and the silver reflection layer 35 is formed over its entire length. In addition, it is also possible to form a silver reflective layer 35 on the surface of the reflective plate 3 and the surface of the light guide plate 4 (the entire area of the reflective surface). However, this will produce a flickering feeling on the opposite side of the output light intensity, so that the display screen is not New problem of clarity. Therefore, it is not ideal to form a silver reflective layer 35 over the entire area of the reflective plate 3. The light guide plate 4 is an injection molded body of a synthetic resin such as acrylic resin, and the upper surface (the emission surface) 28 is substantially rectangular, and The cross-sectional shape is roughly a wedge shape. The fluorescent lamp 7 is arranged on the thick side. In addition, the incident end face 6 of the light guide plate 4 is roughened to adjust the amount of light emitted near the incident end face 6 as a measure to suppress reflection. Yes. On the upper surface 28 or lower surface 37 of the light guide plate 4, a light-diffusing ink (for example, ink using magnesium carbonate, titanium oxide, or the like) is selectively applied, or a rough surface is partially formed so that the light is moderate. Diffusion can be used to adjust the distribution of the emission intensity. 稜鏡 The plate 5 'is formed of a light-transmitting plate such as polycarbonate, and a majority (triangular) cross-section is formed on the surface (bottom) facing the light guide plate 4. The mirror face 38. The orientation of the fascia 5 is such that the fascias extend substantially parallel to the incident end face 6. As is well known, the fascia 5 configured in this way has the upper surface 28 of the light guide plate 4 inclined. The direction of the emitted light turns the liquid crystal display panel to effectively illuminate it. As in the surface light source device 41 configured as described above, the path of light is roughly T. The fluorescent lamp 7 lights up, and most of the light passes through. The opening of the reflective plate 8 ... The Zhang ruler II is applicable to the Chinese National Standard (CNS) A4 specification (21〇X 297 public love)-^--8 311791 (Please read the precautions on the back before filling this page ), Mm II— mamme w ¥ fl I HI n ϋ I eat < printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 518432 .A7 V. Description of the invention < 9) (Please read the precautions on the back before filling in this Page) directly to the incident end face 6. In addition, a part of the light emitted by the fluorescent lamp 7 is reflected by the reflective surface of the silver reflective plate 8 and reaches the incident end surface 6, and the other part is reflected by the silver reflective layer 35 of the projection 34 of the reflective plate 3 and reaches the incident end surface. 6. The important thing here is that the reflection of the silver reflective layer 35 in the projection 34 is also as high as the reflection through the silver reflector 8, so it is possible to avoid reaching the incident end face 6 through the projection 34. Decay of light. In other words, the effective reflection effect of the silver reflecting plate 8 (the efficient light supply to the light guide plate and the high brightness based on this) can be prevented even if the protruding portion 34 is provided on the reflecting plate 3. Of course, this is also the effect of forming the silver reflective layer 35 on the protruding portion 34. The light introduced into the light guide plate 4 from the incident end face is repeatedly reflected between the upper surface 28 and the lower surface 37 and propagates inside the light guide plate 4. In the process, when incident on the inside of the upper face 28 or the lower face 37, a part of the light having an incident angle below the critical angle escapes the outside of the light guide plate 4. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs On the one hand, most of the light emitted from the lower side 'is scattered on the inner side of the reflection plate 3 and then incident on the inside of the light guide plate 4. The re-incident light is propagated in the light guide plate 4 again, and waits for the opportunity to be the escaped light from above 28 = the incident light). When the re-incident light enters the interior when the incident angle is below the critical angle, a part of it will become the outgoing light from the top M. In this way, through all kinds of path processes, the radiated light ρ8 (from the light emitted from 28 above) is generated with a planar diffusion. Take the well-known 'The main propagation direction of this shooting umbrella is that the current direction is leaning forward. Nine 稷 mirror plate 5 will repair its μ liquid crystal display panel (portrait display panel) 1 8 sides, and for — " ^ — daily violent page not; ^ 1 8 female private paper scale _ China National Standard (CNS) A4 specifications (21q x 297 Gongfu 1 — 8 9 311791 518432 A7 B7 V. Description of the invention (10 / Illumination light is supplied from the vertical direction. Also 'as already explained in the item of conventional technology, part of the light is as shown in Figure 3) As shown by the symbol Η, it is intended to enter the light guide plate 4 through the lower edge 30. As mentioned above, if this light is stubborn, a rib-like bright line (reflected) is generated on the output surface (upper surface) of the fascia 5. The embodiment can prevent such uneven brightness due to reflection. Because the reflection plate 3 has a protruding portion 34 extending beyond the edge 30, the majority of the light beam from the lower edge 30 that is intended to enter the light guide plate 4 That is, after the light of the fluorescent lamp 7 reaches the edge 30, it is physically shielded by the projection 34 of the reflection plate 3. Then, the light η that causes reflection is weak. At the same time, as described above , # By forming a silver reflective layer 35 on the protrusion 34, the advantage of using a silver reflective plate 8 (for The efficient light supply of the light plate and the resulting high brightness) can be maintained without being reduced. Realizing such a good condition is the basic and largest feature of the present invention. Of course, the surface light source device i of this embodiment is so The advantage will be reflected in the image display device equipped with the surface light source device. That is, the output illumination light whose mapping has been suppressed is efficiently supplied to the liquid crystal display panel! 8 'becomes a bright and clear high-quality day image display The image display device is used to illuminate the liquid crystal display panel 18 with high-brightness output light without bright lines, which is more possible than the conventional example of a bright and high-quality day image display. 'Refer to Figures 4 to 6 to explain the second implementation of the present paper rule ^ iiVia standard (CN ^ 4 specifications ⑵Q χ tear 311791 (Please read the precautions on the back before filling this page) (1 pack- ---- r --- Order ------- t '---- 4 Printed by the Intellectual Property Office of the Ministry of Economic Affairs, Consumer Cooperatives 10 518432 A7 B7 V. Description of the invention (U) Example of surface light source device In the fourth figure, the entire second is indicated by the symbol 4 i The surface light source device of the embodiment is shown in the same oblique view as in Fig. 1. Fig. 5 shows a cross section of an important part of the surface light source device along the BB line in Fig. 4. Also, Fig. 6 shows this embodiment. A plan view of the protruding portion of the reflecting plate to be used. In addition, the symbols used in the first embodiment are commonly used as much as possible. In addition, repeated descriptions of the structure and function of the parts common to the first embodiment are omitted as much as possible. In the figure, a reflecting plate 3, a light guide plate 4, and a fascia plate 5 are sequentially stacked and housed in a substantially rectangular frame 42. The light guide plate 4 faces one side end face (incident end face) 6 side, and is provided with fluorescent light. Light (primary light source) 7. Both ends of the fluorescent lamp 7 are fixed to the frame body 43 of the frame 42 in a detachable state. In addition, the fluorescent lamp 7 is surrounded by a reflective plate 44 from the back, and the light of the fluorescent lamp 7 is reflected to the incident surface 6 by the reflective plate 44. The frame 42 is an injection-molded body made of white synthetic resin. The frame 42 is provided with a substantially rectangular frame 43, and the convex portions 45 and 46 supporting the reflecting plate 3 and the like from below, and fixed to the frame 43 with bolts 48 and 48. The plate member 50 of the notch 47 on the upper side. The upper surfaces of the frame body 43 and the plate member 50 are formed with plate fastening portions 51a and 51b for fastening the liquid crystal display panel (image display panel) 18. A liquid crystal display panel (image display panel) 18 'is accommodated in the plate engaging portions 51a and 51b, and the liquid crystal display panel 18 is assembled to the frame 42 to constitute an image display device 55.
反光板44，係以白色pet膜片或金屬板形成.大致U 裝--- Γ%先閱讀背面之注音？事項再填寫本頁} 訂： •線· 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 11 311791 518432 A7 B7 五、發明說明（12 ) 字形狀者為基座，在其内面形成銀反射層52。反光部44 開口部之上端部53，在上邊緣（入射端面6與上部平面28 會合之邊緣）之近傍抵接於上面28。又，反光板44之開口 部之下端部54，則在下邊緣30之近傍，抵接於反射板3 之螢光燈7側之下面3 a。 與第1實施例相同，反射板3係具有突出部34，該突 出部34中，在内側面（一次光源側之面至上面）3b形成銀反 射層35。反射板3,除了此反射層之外，均由白色pet板 所形成。其尺寸係可收容於框架2内，且，設計成可提供 超越導光板4之入射面6(下邊緣30)而突出於螢光燈7側 之突出部34。 反射板3之突出部34之長度L為1至2mm，而其全 長均形成有銀之反射層35。 又’在與反射板3之導光板4相面向之面（反射面）3b 之全域，形成銀之反射層35亦有可能。但，如在第1實施 例之說明’在反射板3之全域形成銀反射層3 5，並不理想。 螢光燈7若點燈，其光大部分通過反光板44之開口部 直接到達入射端面6。另外，由螢光燈7所放出光之一部 分，係由反光板44之銀色反射層52有效反射之後到達入 射端面6，另外一部分，則經由反射板3之突出部34之銀 色反射層35反射之後，到達入射端面石。 於本實施例中，突出部34之銀色反射層35之反射， 係具有與反光板44之銀色反射層52之反射相同之高反射 率，所以可避免經由突出部34到達入射端面6之光之減 (請先閱讀背面之注意事項再填寫本頁) J衷 . T ' —8 ϋ 1,— 1 1 0 I n n I 1— in < 經濟部智慧財產局員工消費合作社印制农 本纸張尺度適用中國國家標準（CNS)A4規格(210 X 297公爱 12 311791 51.8432 A7 B7 φ 經 濟 部 智 慧 財 產 局 消 費 合 社 印 五、發明說明（13 ) 衰。 換言之，經由具有銀色反射面之反光板44有效率之反 射之效果（對於導光板有效率之光供給，因此獲得之高亮度 化），即使在反射板3設置突出部34，亦不致受到阻礙。 另外，反光板44之下端部54，係由框架42之外凸部 46所支持。 本實施例亦可防止因映射所產生之亮度不均勻。因 為，反射板3具有超越邊緣30而延伸之突出部34,所以 經由下邊緣30欲進入導光板4内之光Η大部分被鎖住。 螢光燈7之光到了邊緣30之後，以反射板3之突出部34 物理地遮蔽。成為映射原因之光Η被削弱。 同時，如上所述，藉由在突出部34形成銀色反射層 35,使用形成銀色反射層52之反光板44之優點（對於導光 板有效率之光供給與因此所得到之高亮度化）不致減損而 w獲得維持。實現如此良好之狀況，為本發明基本且最大 之特徵。當然，本實施例之面光源裝置41如此之優點，將 反映於裝配有該面光源裝置之晝像顯示裝置W。 再者，在本實施例中，經由將板零件5〇以螺栓48、 48固疋於框體43’將反射板3推壓於下邊緣％，反射板3 少：變形而將下邊緣30確實覆蓋’所以藉由反射板3可更 加確實地遮蔽由邊緣3〇之光入射。 亦即’映射被抑制之輸出昭明 一 …、Θ九有效率供給於液晶顯 不板18’成為可進行明其、、杳 仃月“晰之冋品位之畫像顯示。 其他之實施例： —尺度適用' 13 311791 -------------裝--------訂—--------線 (請先閱讀背面之注意事項再填寫本頁) 518432 A7 ------_— B7__ 五、發明說明（14 ) 本發明並非受限於以上所述之實施例。例如，以下之 變形亦屬可行。 (1) 於上料實施例之中，採用了剖面為楔形之導光板 4’但，此僅為例亦而已。例如，導光板4之上面（出射面）28 與下面（背面）37形成為平行者，或使用其他適宜形狀之導 光板4亦可。 (2) —次光源係非受限於螢光燈。例如，將複數之發光 二極管排成一列，做為一次光源使用亦可。 (3) 將導光板4之複數側端面做為入射端面，由該處導 入光亦可。在此情形，反射板之突出部（付有銀色反射層）， 一次光源及反光板（具有銀色反射面），亦可同時做成複 (4) 在上述各實施例，在導光板4之上面22僅例示配 置1枚稜鏡板5之態樣，但此為例亦而已。例如，在導光 板4之上面22,適當配置擴散板或稜鏡面之稜鏡列組合成 大致正交之2枚稜鏡板，或保護板等亦可。 [圖式之簡單說明] 第1圖係為本發明之第1實施例有關面光源裝置之分 解斜視圖。 第2圖係為第1圖中沿A-A線之面光源裝置之重要部 分剖視圖。 第3圖係關於第2圖所示剖面構造，為1次光源周邊 放大圖。 第4圖係為本發明之第2實施例有關光源裝主要 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 311791 (請先閱讀背面之注意事項再填寫本頁) -----^ —訂-----—0'— 總y· 經濟部智慧財產局員工消費合作社印製 14Reflector 44 is formed by white pet film or metal plate. Roughly U --- Γ% read the phonetic on the back first? Please fill in this page again for the items} Order: • Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives The paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 11 311791 518432 A7 B7 V. Description of the invention ( 12) The figure is a base, and a silver reflective layer 52 is formed on the inner surface. The upper end portion 53 of the reflective portion 44 opening is abutted on the upper surface 28 near the upper edge (the edge where the incident end surface 6 meets the upper flat surface 28). In addition, the lower end portion 54 of the opening portion of the reflecting plate 44 abuts against the lower surface 3a of the fluorescent lamp 7 side of the reflecting plate 3 near the lower edge 30. As in the first embodiment, the reflecting plate 3 has a protruding portion 34, and a silver reflecting layer 35 is formed in the protruding portion 34 on the inner surface (the surface on the primary light source side to the upper surface) 3b. The reflecting plate 3 is formed of a white pet plate except for the reflecting layer. Its size is accommodated in the frame 2 and it is designed to provide a protruding portion 34 beyond the incident surface 6 (lower edge 30) of the light guide plate 4 and protruding beyond the fluorescent lamp 7 side. The length L of the protruding portion 34 of the reflection plate 3 is 1 to 2 mm, and a reflection layer 35 of silver is formed on the entire length. It is also possible to form a silver reflection layer 35 over the entire area of the surface (reflection surface) 3b facing the light guide plate 4 of the reflection plate 3. However, as described in the first embodiment, it is not preferable to form the silver reflection layer 35 over the entire area of the reflection plate 3. When the fluorescent lamp 7 is turned on, most of the light directly reaches the incident end face 6 through the opening of the reflector 44. In addition, a part of the light emitted by the fluorescent lamp 7 is effectively reflected by the silver reflective layer 52 of the reflective plate 44 and reaches the incident end face 6, and the other part is reflected by the silver reflective layer 35 of the projection 34 of the reflective plate 3. , Reach the incident end face stone. In this embodiment, the reflection of the silver reflective layer 35 of the protruding portion 34 has the same high reflectance as that of the silver reflective layer 52 of the reflector 44, so that the light reaching the incident end face 6 through the protruding portion 34 can be avoided. Minus (Please read the notes on the back before filling out this page) J sincerely. T '—8 ϋ 1, — 1 1 0 I nn I 1— in < Printed agricultural paper by the Consumers ’Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs The scale is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 Public Love 12 311791 51.8432 A7 B7 φ Printed by the Consumer Property Co., Ltd. of the Intellectual Property Bureau of the Ministry of Economic Affairs of the People's Republic of China 5. Disclosure of the invention (13). In other words, via a reflective plate with a silver reflective surface 44 The effect of efficient reflection (the light is efficiently supplied to the light guide plate, so the high brightness is obtained), even if the protruding portion 34 is provided on the reflecting plate 3, it will not be hindered. In addition, the lower end portion 54 of the reflecting plate 44, It is supported by the convex portion 46 of the frame 42. This embodiment can also prevent uneven brightness caused by the mapping. Because the reflecting plate 3 has a protruding portion 34 extending beyond the edge 30, it passes through the lower edge 30 Most of the light rays entering the light guide plate 4 are locked. After the light of the fluorescent lamp 7 reaches the edge 30, it is physically shielded by the protruding portion 34 of the reflection plate 3. The light rays that cause the mapping are weakened. At the same time, as described above As described above, by forming the silver reflecting layer 35 on the protruding portion 34 and using the light reflecting plate 44 forming the silver reflecting layer 52 (the efficient light supply for the light guide plate and the resulting high brightness) are not reduced and w is maintained. Realizing such a good condition is the basic and biggest feature of the present invention. Of course, the advantages of the surface light source device 41 of this embodiment will be reflected in the daylight image display device W equipped with the surface light source device. Furthermore, in In this embodiment, the plate part 50 is fixed to the frame body 43 'by bolts 48, 48, and the reflecting plate 3 is pushed to the lower edge%, and the reflecting plate 3 is less: the deformation does cover the lower edge 30, so borrow The reflection plate 3 can more reliably shield the light incident from the edge 30. That is, the output of the 'suppressed mapping', Akira I., Θ, is efficiently supplied to the liquid crystal display panel 18, and it becomes possible to perform the illumination. Month Bit portrait display. Other examples:-scale applicable '13 311791 ------------- equipment -------- order --------- line ( Please read the notes on the back before filling this page) 518432 A7 ------_— B7__ V. Description of the invention (14) The present invention is not limited to the embodiments described above. For example, the following modifications are also (1) In the feeding embodiment, a light guide plate 4 'with a wedge-shaped cross section is used, but this is only an example. For example, the upper surface (emission surface) 28 and the lower surface (rear surface) 37 of the light guide plate 4 are used. It may be formed in parallel, or a light guide plate 4 of another suitable shape may be used. (2) — The secondary light source is not limited to fluorescent lamps. For example, a plurality of light emitting diodes may be arranged in a row and used as a single light source. (3) The end face on the plural side of the light guide plate 4 is used as the incident end face, and light may be guided from there. In this case, the protruding portion of the reflecting plate (with a silver reflecting layer), the primary light source and the reflecting plate (having a silver reflecting surface) can also be made at the same time. (4) In the above embodiments, above the light guide plate 4 22 only exemplifies the configuration of one fascia board 5, but this is just an example. For example, on the upper surface 22 of the light guide plate 4, a diffuser plate or an array of ridges may be arranged as appropriate to form two orthogonal ridge plates or a protection plate. [Brief description of the drawings] Fig. 1 is an exploded perspective view of the surface light source device according to the first embodiment of the present invention. Fig. 2 is a cross-sectional view of an important part of the surface light source device along the line A-A in Fig. 1. Fig. 3 is a cross-sectional structure shown in Fig. 2 and is an enlarged view around the primary light source. Figure 4 is the second embodiment of the present invention. The main paper size of the paper is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 311791 (Please read the precautions on the back before filling this page)- ---- ^ —Order -----— 0'— Total · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 14
五、發明說明（15 ) 邹分剖視圖。 經濟部智慧財產局員工消費合作社印制农 第5圖係為第4圖中沿Β·Β線之面光源裝置之主要部 分剖視圖。 第6圖係顯示第2實施例所採用反射板之突出部俯視 圖。 第7圖係關於說明i個習知例之剖面圖。 第8圖係為說明第7圖所示習知例之缺點之圖，（a) 為前視之剖面圖，（b)為俯視圖。 第9圖係為說明另一習知例之剖視圖。 [元件符號之說明] --------^ --------*5^ (請先閱讀背面之注意事項再填寫本頁) 卜 41、 61面光源裝置 1、 42 框架 3 . 65 反射板 3a 下面 3 b 内側面 4、 62 導光板 5、 66 稜鏡板 6、 63 入射端面 7、 64 螢光燈（一次光源） 8、 44〜 67 反光板 10 支持板 η、 12、13 、14 邊 15 舌片 16 反光板固定部 17 支持板固定部 18 >68 液晶顯不板(畫像顯示板) 20 板扣合部 21 第1扣合部 22 第2扣合部 23 ' 35 > 52 銀反射層 24、 3卜 48螺栓 25 、32 反光板之基部 26 豎立壁部 27 凸緣部 27a 板支持面部份 27b 導光板押壓部份 28 導光板之上面（出射面) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 15 311791 518432 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（16 ) 30、70 下邊緣（入射端面與導光板之背面會合之邊緣） 33 背板部 34 反射板之突出部 35 反射層 37 導光板之下面（背面） 38 稜鏡面 43 框體 45 > 46 外凸 47 缺口部 50 板零件 51a、51b 板扣合部 55、60 畫像顯示裝置 p8 出射光 (請先閱讀背面之注意事項再填寫本頁) 裝 —fl i n ^ 雪 ·η·ι· ew wa aw ->0 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 16 3117915. Description of the invention (15) Zou's sectional view. Fig. 5 is a cross-sectional view of the main part of the surface light source device along the line BB in Fig. 4 in the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Fig. 6 is a plan view showing a protruding portion of a reflecting plate used in the second embodiment. Fig. 7 is a cross-sectional view illustrating i conventional examples. Fig. 8 is a diagram illustrating the disadvantages of the conventional example shown in Fig. 7, (a) is a front sectional view, and (b) is a top view. Fig. 9 is a sectional view illustrating another conventional example. [Explanation of component symbols] -------- ^ -------- * 5 ^ (Please read the precautions on the back before filling this page) Bu 41, 61 surface light source device 1, 42 frame 3. 65 Reflector 3a Bottom 3 b Inner side 4, 62 Light guide 5, 66 Fascia 6, 63 Incident end face 7, 64 Fluorescent lamp (primary light source) 8, 44 ~ 67 Reflector 10 Support plate η, 12, 13, 14 sides 15 Tongue pieces 16 Reflective plate fixing portion 17 Support plate fixing portion 18 > 68 LCD display panel (image display plate) 20 Plate engaging portion 21 First engaging portion 22 Second engaging portion 23 '35 > 52 silver reflective layer 24, 3, 48 bolts 25, 32 base part of reflector 26 upright wall part 27 flange part 27a board support surface part 27b light guide plate pressing part 28 top of light guide plate (output surface) Paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 15 311791 518432 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (16) 30, 70 Lower edge (incident end face and guide The edge where the back of the light plate meets) 33 the back plate portion 34 the protruding portion of the reflection plate 3 5 Reflective layer 37 Underside of the light guide plate (back side) 38 Beveled surface 43 Frame 45 > 46 Convex 47 Notch portion 50 Plate parts 51a, 51b Plate engaging portion 55, 60 Image display device p8 Light emitted (please read the back first Please pay attention to this page and fill in this page) Packing—fl in ^ Snow · η · ι · ew wa aw-> 0 This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 16 311791