201002982 六、發明說明： 【發明所屬之技術領域】 本發明係有關即使光源數量少，亦可以高亮度射出均 一的光於正面方向之面光源裝置，及即使光源數量少，亦 可朝向正面方向均一顯示明亮畫像之透過型畫像顯示裝置 【先前技術】 作爲透過型畫像顯示裝置，係知道有於使用例如透過 型液晶單元等加以構成之透過型畫像顯示部之背面側，將 正下方型之面光源裝置’作爲背照光加以配置之構成者。 作爲前述面光源裝置，係知道有於燈箱內，相互隔開間隔 配置複數的光源同時，於光源的前面側，配置光擴散板， 更且於該光擴散板之前面側，配置稜鏡構件之構成的面光 源裝置（參照日本特開平7-141908號公報（段落〇〇12，圖 【發明內容】 但構成面光源裝置之光源數量係在可省電化的點，當 然盡可能縮減爲佳，但當減少光源數時，從亮度減少的情 況’作爲面光源裝置係要求即使光源數量少，亦可以高亮 度射出均一的光之構成。 對此，在記載於上述文獻之面光源裝置中，由稜鏡構 件所成之偏向構造部乃在鄰接之2個光源之間，使來自最 -5- 201002982 接近之一方的光源的光，可呈朝向法線方向（垂直方向） 之前面側射出地加以構成，但對於來自另一方之光源的光 之射出方向，並僞作任何考慮之構成，例如在光源之配置 數少的設計，無法對於正面方向充分確保高的亮度者。 本發明係有鑑於有關之技術性背景所作爲之構成，其 目的乃提供：即使光源數量少，亦可以高亮度射出無亮度 不勻之均一的光於正面方向之面光源裝置，及即使光源數 量少，亦可朝向正面方向無不勻之均一顯示高亮度之畫像 之透過型畫像顯示裝置。 爲了達成前述目的，本發明乃提供以下之手段。 [1] 一種面發光裝置，屬於將3個以上之光源，相互隔 開間隔加以配置，於此等光源之前面側，配置改變從該光 源所放射的光之方向的偏向構造板，於對應於在前述偏向 構造板之鄰接的2個光源之間的範圍之範圍，設置遮蔽從 該鄰接之2個光源以外的光源所放射的光直接射入之遮蔽 部，於前述光源的背面側，設置將從該光源朝向背面側所 放射的光，朝向該光源或朝向該光源之附近位置加以反射 之反射面部而成之面光源裝置，其特徵乃 前述偏向構造板係於對應於在該偏向構造板之鄰接的 2個光源之間的範圍之範圍，呈可使從該鄰接之2個光源直 接射入的光，同時朝向該偏向構造板之法線方向的前面側 方向加以射出地所構成。 [2] 如前項第1項所記載之面光源裝置，其中，前述遮 蔽部與前述反射面部乃加以一體成形。 -6- 201002982 [3] 如前項第1項或第2項所記載之面光源裝置，其中， 前述反射面部乃具備 曲率中心存在於該光源範圍或該光源之附近位置的1 或複數之曲面反射面，或/及在該光源之背面側，呈圍著 該光源地加以配置之複數的平面反射面，針對在垂直交叉 於該光源的長度方向的面之剖面視，包含此等平面反射面 之兩端的頂點所有之最小的假想圓之中心乃存在於該光源 範圍或該光源附近位置之複數的平面反射面所成。 [4] 如前項第1項至第3項任一所記載之面光源裝置，其 中，前述反射面部係作爲從該光源之背面側範圍延伸至該 光源之左側的略側方範圍及右側的略側方範圍而加以形成 ’而從該光源朝向背面側及左右兩側的略側方所放射的光 乃由前述反射面部所反射，朝向該光源或朝向該光源附近 位置加以反射之構成者。 [5] 如前項第1項至第4項任一所記載之面光源裝置，其 中，前述反射面部係將從該光源朝向背面側所放射的光， 朝向該光源附近位置加以反射之構成。 [6] 如前項第1項或第5項任一記載之面光源裝置，其中 ，前述光源附近位置的範圍乃 將前述偏向構造板與前述光源之離間間隔作爲「Η」 ，將鄰接之光源之間的中心間距離作爲「L」時，於前述 偏向構造板之法線方向，以平行至通過該光源之中心位置 之第1假想直線爲止之垂直距離乃0.15L以下，且對於前述 偏向構造板而言，以平行至通過該光源之中心位置之第2 201002982 假想直線爲止之垂直距離乃〇·15Η以下之範圍，從該光源 之中心位置之距離乃除了該光源之半徑以下之光源範圍的 範圍。 一種透過型畫像顯示裝置，其特徵乃於透過型畫像顯 示部之背面側，配置如前項第1〜6項任一記載之面光源裝 置而成者。 在[1 ]的發明中，係因於對應於在偏向構造板之鄰接的 2個光源之間的範圍之範圍，可使從該鄰接之2個光源直接 射入的光，同時朝向該偏向構造板之法線方向的前面側方 向加以射出之故，即使光源之配置數量少，亦可以高亮度 射出均一的光。即，可對於正面方向進行充分亮度照射。 另外，因於對應於在偏向構造板之鄰接的2個光源之 間的範圍之範圍，設置遮蔽從該鄰接之2個光源以外的光 源所放射的光直接射入之遮蔽部之故，可阻止對於成爲亮 度之不均一性的原因之光直接射入於偏向構造板，可射出 無亮度不勻之均一的光者。即，即使光源的配置數量少， 亦可以高亮度射出無亮度不句之均一的光。 更且，於光源的背面側，設置有將從該光源朝向背面 側加以放射的光，朝向該光源或朝向該光源附近位置加以 反射之反射面部，從光源朝向背面側所放射的光乃由前述 反射面部所反射而成之反射光係因以接近於從該光源朝向 前面側所放射而直接射入於偏向構造板的光之路徑的路徑 ，射入於偏向構造板之故，該反射光乃朝向偏向構造板之 法線方向的前面側方向而加以射出。如此，不只從光源朝 -8 - 201002982 光，而從光源 反射而可朝向 射出（即，反 故，更可使面 射面部的構成 以放射的光。 光做有效利用 加以射出，隨 此，在本發明 將高亮度光射 部的構成中， 源之間的範圍 放射的光乃直 構造板之法線 方向偏移之特 1 . 5 7之情況， 圍），係產生 置有具備上述 範圍之亮度的 的高亮度光者 向前面側所放射而直接射入於偏向構造板的 朝向背面側所放射的光亦歷經由反射面部之 偏向構造板之法線方向的前面側方向而加以 射光亦可有效利用而射出於前面側方向）之 光源裝置之正面方向的亮度提昇者。 另一方面，在未設置有關上述構成之反 中，無法充分有效利用從光源朝向背面側加 即，幾乎無法將從光源朝向背面側所放射的 而朝向偏向構造板之法線方向的前面側方向 之無法對於正面方向得到充分的亮度者。對 中，由設置上述構成所成之反射面部者，可 出至正面方向者。 另外，在未設置有具備上述構成之遮蔽 係因於對應於在偏向構造板之鄰接的2個光 之範圍，從該鄰接之2個光源以外的光源所 接地射入，而如此之入射光係無法朝向偏向 方向的前面側方向加以射出，因此在從法線 定角度範圍（例如，偏向構造板的折射率乃 法線方向所成之角度乃約15度以上之角度範 亮度之不均一性。對此，在本發明中，由設 構成之遮蔽部者，可充分地抑制在特定角度 不均一性產生，而可射出無亮度不勻之均一 在[2]的發明中，因採用一體成形遮蔽部與反射面部所 201002982 成之構成，故可削減裝置之構件數，由此可降低生產成本 之同時，亦可減少組裝工數，亦可使生產性提昇者。 在[3]的發明中，反射面部係具備a)曲率中心存在於 該光源範圍或該光源之附近位置的1或複數之曲面反射面 ，或/及b )在該光源之背面側，呈圍著該光源地加以配置 之複數的平面反射面，針對在垂直交叉於該光源的長度方 向的面之剖面視，包含此等平面反射面之兩端的頂點所有 之最小的假想圓之中心乃存在於該光源範圍或該光源附近 位置之複數的平面反射面所成之構成之故，可更使正面方 向之亮度提昇者。 在[4]之發明中，作爲從該光源之背面側範圍延伸至該 光源之左側的略側方範圍及右側的略側方範圍而加以形成 ，而從該光源朝向背面側及左右兩側的略側方所放射的光 乃由前述反射面部所反射，朝向該光源或朝向該光源附近 位置加以反射之構成之故，不只從光源朝向背面側所放射 的光，而朝向光源之左右兩側之略側方所放射的光亦可朝 向偏向構造板之法線方向的前面側方向而加以射出’由此 更可使正面方向的亮度提昇者。 在[5 ]之發明中，反射面部係將從該光源朝向背面側所 放射的光，朝向該光源附近位置加以反射之構成之故’更 可使正面方向的亮度提昇者。 在[6]之發明中，光源附近位置之範圍乃因限定於對於 光源特別接近之特定範圍的構成，故可更可使正面方向的 亮度提昇者。 -10- 201002982 在[7]之發明中，提供即使光源之配置數量少，亦可顯 示朝向正面方向無不勻之明亮畫像的透過型畫像顯示裝置 【實施方式】 圖1〜5乃顯示關於本發明之透過型畫像顯示裝置（10 )之一實施型態（第1實施形態）的液晶顯示裝置。圖1中 ，（1 〇 )係液晶顯示裝置、（11 )係液晶單元' (1 2 )( 1 3 )係偏光板、（1 )係面光源裝置。於前述液晶單元（ 1 1 )之上下兩側，各配置偏光板（1 2 )( 1 3 )，經由此等 構成構件（11) (12) (13)構成透過型畫像顯示部（14 )。 前述面光源裝置（1)乃配置於前述下側之偏光板（ 1 3 )之下面側（背面側）。其面光源裝置（1 )乃平面視 矩形狀，具備開放上面側（前面側）之薄箱型狀之燈箱（ 5 )，和於該燈箱（5 )內，相互離間加以配置之3個以上 的複數之光源（2)，和配置於此等複數之光源（2)之上 方側（前面側）的偏向構造板（3 )。前述偏向構造板（3 )係對於前述燈箱（5 )而言，呈封閉其開放面地加以載 置而固定。 在本實施型態中，作爲前述光源（2)而使用螢光管 ，但並無特別加以限定者。另外，在本實施型態中，爲在 說明的方便上，作爲光源（2)，顯示使用第1光源（21) 、第2光源（22)、第3光源（23)、第4光源（24)及第5 -11 - 201002982 光源（2 5 )之構成，即顯示使用5個之光源的例’但敢無 特別加以限定如此之光源數者’如爲3以上之複數即可。 前述偏向構造板（3)乃具有改變從前述光源（2)所 放射而入射至該偏向構造板（3)的光之方向機能的板° 在本發明中，前述偏向構造板（3 )係於對應於在該偏向 構造板（3 )之鄰接的2個光源（2 )( 2 )之間的範圍之範 圍，呈可使從該鄰接之2個光源（2) (2)直接射入的光 (例如，通過在圖2以實線顯示之光路的光），同時朝向 該偏向構造板（3 )之法線方向的前面側方向（a )加以射 出地所構成。 參照圖2之同時個別進行說明時’於對應於在前述偏 向構造板（3 )之鄰接的第1光源（2 1 )與第2光源（22 ) 之間的範圍之範圍，呈可使從該鄰接之2個光源（21)( 22)直接射入的光（FI) (F2) ’同時朝向該偏向構造板 (3 )之法線方向的前面側方向（a )加以射出地所構成。 另外，同樣地，於對應於在前述偏向構造板（3 )之鄰接 的第2光源（22 )與第3光源（23 )之間的範圍之範圍’呈 可使從該鄰接之2個光源（22) (23)直接射入的光（F2 )(F3 )，同時朝向該偏向構造板（3)之法線方向的前 面側方向（a )加以射出地所構成。更且’對於在前述偏 向構造板（3)之其他範圍（93) (94) ’亦採用同樣的 構成。 前述偏向構造板（3 )之背面（光源側的面）（光入 射面）（3 b )係如圖4所示’遍佈於其全面，形成爲平滑 -12- 201002982 面。 前述偏向構造板（3)之前面（畫像顯示部側的面） (光出射面）（3 a )係如圖1〜3所示，由對應於鄰接的第 1光源（21 )與第2光源（22)之間的範圍之範圍（91 )、 對應於鄰接的第2光源（22 )與第3光源（23 )之間的範圍 之範圍（9 2 )、對應於鄰接的第3光源（2 3 )與第4光源（ 2 4 )之間的範圍之範圍（9 3 )及對應於鄰接的第4光源（ 24)與第5光源（25)之間的範圍之範圍（94)之4個範圍 所成，此等4個的範圍（91) (92) (93) (94)係均各 劃分成 30 之小範圍（Am; m=0、1、2、3、4、5.....2 7 、28、29)(參照圖2，3)。各小範圍（Am; m=0〜29 )的寬度係均爲l〇〇〇"m(lmm)。 前述各小範圍之中，位於前述光源（2)之正上方位 置的小範圍（A0 )之光出射面（3a )係如圖4所示，形成 爲平滑面。隨之，於此小範圍（A0 )，從正下方的光源（ 2)入射的光係光入射面（3b)及光出射面（3a)之任一 乃平滑面之故’直接朝向偏向構造板（3)之法線方向的 前面側方向（a )加以射出。 另外，在除了前述偏向構造板（3 )之前述小範圍（ A0)之殘餘的29個小範圍（Ara; m=l〜29)中，光出射 面（3 a )係如圖4所示，剖面形狀乃以三角形之稜鏡加以 構成。在各小範圍（Am; m=l〜29)的稜鏡（二角形） 之數量係各20個。另外’稜鏡（三角形）之間隔（U ' t2 .....t28、t29)係均爲50ym。另外’構成在小範圍（ -13- 201002982201002982 VI. Description of the Invention: The present invention relates to a surface light source device capable of emitting uniform light in a front direction with high brightness even when the number of light sources is small, and even if the number of light sources is small, it can be uniform toward the front direction. A transmissive image display device that displays a bright image. [Prior Art] As the transmissive image display device, the surface of the transmissive image display unit configured by using, for example, a transmissive liquid crystal cell is used. The device 'constructs as a backlight. In the above-described surface light source device, it is known that a plurality of light sources are disposed at intervals in the light box, and a light diffusing plate is disposed on the front side of the light source, and a 稜鏡 member is disposed on the front side of the light diffusing plate. The surface light source device is configured (refer to Japanese Patent Laid-Open No. Hei. No. 7-141908 (paragraph 〇〇12, Fig. [Invention]] However, the number of light sources constituting the surface light source device is at a point where power can be saved, and it is of course preferable to reduce it as much as possible. When the number of light sources is reduced, the brightness is reduced. As a surface light source device, it is required to emit uniform light with high luminance even when the number of light sources is small. In this regard, in the surface light source device described in the above document, The deflecting structure formed by the mirror member is formed between the adjacent two light sources so that light from a light source close to one of the most -5 - 201002982 can be emitted toward the front side in the normal direction (vertical direction). However, for the direction of the light from the other source, and for any consideration, for example, the design with a small number of light sources cannot be used for the front. The present invention has been made in view of the related technical background, and its object is to provide a uniform light having no brightness unevenness in a front direction even if the number of light sources is small. The surface light source device and the transmissive image display device which can display a high-intensity image uniformly without unevenness in the front direction. The present invention provides the following means for achieving the above object. [1] The light-emitting device is disposed such that three or more light sources are arranged at a distance from each other, and a deflecting structural plate that changes the direction of light emitted from the light source is disposed on the front surface side of the light source, and corresponds to the deflecting structural plate. The range of the range between the adjacent two light sources is provided with a shielding portion that shields light emitted from a light source other than the adjacent two light sources, and is disposed on the back side of the light source from the light source toward the back side. a surface light source device in which light emitted from the side is reflected toward the light source or toward a position near the light source. The sign is such that the deflecting structural plate is in a range corresponding to a range between two adjacent light sources of the deflecting structural plate, and is light that can be directly incident from the adjacent two light sources while facing the deflecting structural plate. [2] The surface light source device according to the first aspect of the invention, wherein the shielding portion and the reflecting surface portion are integrally formed. -6- 201002982 [3] The surface light source device according to the first aspect or the second aspect, wherein the reflective surface portion includes one or a plurality of curved surface reflecting surfaces having a center of curvature existing in the light source range or the light source, or/and The back side of the light source is a plurality of planar reflecting surfaces arranged around the light source, and the vertices at both ends of the plane reflecting surfaces are the smallest for the cross-section of the surface perpendicular to the longitudinal direction of the light source. The center of the imaginary circle is formed by a plurality of planar reflecting surfaces existing in the range of the light source or in the vicinity of the light source. [4] The surface light source device according to any one of the preceding claims, wherein the reflective surface portion is a slight lateral range and a right side extending from a back side of the light source to a left side of the light source. The light radiated from the light source toward the back side and the left and right sides is reflected by the reflecting surface, and is reflected toward the light source or toward the vicinity of the light source. [5] The surface light source device according to any one of the preceding claims, wherein the reflecting surface is configured to reflect light emitted from the light source toward the back side toward a position near the light source. [6] The surface light source device according to any one of the preceding claims, wherein the position of the vicinity of the light source is such that the distance between the deflecting structure plate and the light source is "Η", and the adjacent light source is When the distance between the centers is "L", the vertical distance from the first imaginary straight line passing through the center position of the light source in the normal direction of the deflection constituting plate is 0.15 L or less, and the deflection structural plate is The distance from the center of the light source to the range from the center of the light source to the range of 〇·15Η or less parallel to the second 201002982 imaginary line passing through the center of the light source is a range of the light source range other than the radius of the light source. . A transmissive image display device is characterized in that the surface light source device according to any one of items 1 to 6 of the above item is disposed on the back side of the transmissive image display unit. In the invention of [1], the light directly incident from the adjacent two light sources can be simultaneously directed to the deflecting structure due to the range corresponding to the range between the adjacent two light sources of the deflecting structural plate. The front side direction of the normal direction of the board is emitted, and even if the number of light sources is small, uniform light can be emitted with high luminance. That is, sufficient brightness illumination can be performed for the front direction. Further, since the shielding portion that directly blocks the light emitted from the light source other than the adjacent two light sources is disposed in a range corresponding to the range between the adjacent two light sources of the deflecting structure plate, it is possible to prevent Light that is a cause of unevenness in brightness is directly incident on the deflecting structural plate, and a uniform light having no unevenness in brightness can be emitted. That is, even if the number of light sources is small, it is possible to emit light of uniform brightness without brightness. Further, on the back side of the light source, light radiated from the light source toward the back side is provided, and a light reflecting surface toward the light source or a position facing the light source is reflected, and the light emitted from the light source toward the back side is The reflected light reflected by the reflecting surface is incident on the deflecting path by a path that is directly incident on the path of the light that is emitted from the light source toward the front side and directly incident on the deflecting structural plate, and the reflected light is incident on the deflecting structure. The light is emitted toward the front side direction of the normal direction of the deflecting structural plate. In this way, not only from the light source to the light of -8 - 201002982, but also from the light source, it can be emitted toward the light source (that is, the light can be radiated by the composition of the face-emitting surface. The light is effectively used for injection, and accordingly, In the configuration of the high-intensity light-emitting portion, the light emitted in the range between the sources is shifted in the normal direction of the straight structural plate, and the brightness is in the range of the above range. It is also effective that the light emitted by the high-brightness light emitted toward the front side and directly incident on the back surface side of the deflecting structure plate is also emitted through the front side direction of the normal direction of the reflecting surface. A brightness booster in the front direction of the light source device that is used in the front side direction. On the other hand, in the case where the above-described configuration is not provided, it is not possible to sufficiently use the light source toward the back side, and it is almost impossible to radiate from the light source toward the back side and toward the front side direction of the normal direction of the deflection structural plate. It is impossible to get sufficient brightness for the front direction. For the center, the person who has the reflective face formed by the above configuration can go to the front direction. Further, the shielding system having the above-described configuration is not grounded, and the incident light system is incident from the light source other than the adjacent two light sources in accordance with the range of the two adjacent lights in the deflecting structural plate. Since it is not possible to emit in the front side direction of the deflecting direction, the angle of the normal angle is set from the normal angle (for example, the angle formed by the refractive index of the structural plate is a normal angle of about 15 degrees or more). On the other hand, in the present invention, it is possible to sufficiently suppress the occurrence of unevenness at a specific angle by the shielding portion having the configuration, and it is possible to emit uniformity without unevenness in brightness. In the invention of [2], the integrated molding is used. Since the structure is formed by the reflection surface unit 201002982, the number of components of the device can be reduced, thereby reducing the production cost, reducing the number of assembly work, and improving the productivity. In the invention of [3], The reflective facial system is provided with a) a plurality of curved reflecting surfaces having a center of curvature existing in the range of the light source or in the vicinity of the light source, or/and b) on the back side of the light source, surrounding the light source Configuring a plurality of planar reflecting surfaces for a cross-sectional view of a face perpendicularly intersecting the length direction of the light source, the center of the imaginary circle containing all of the vertices at both ends of the planar reflecting surface exists in the range of the light source or The formation of a plurality of plane reflecting surfaces at a position near the light source can further enhance the brightness in the front direction. In the invention of [4], it is formed as a slightly lateral range extending from the back side of the light source to the left side of the light source and a side of the right side, and the light source is directed toward the back side and the left and right sides. The light emitted by the side is reflected by the reflecting surface, and is reflected toward the light source or toward the vicinity of the light source. Therefore, not only the light emitted from the light source toward the back side but also the left and right sides of the light source The light emitted by the side can also be emitted toward the front side direction of the normal direction of the structural plate, so that the brightness in the front direction can be increased. In the invention of [5], the reflecting surface is configured such that the light radiated from the light source toward the back side is reflected toward the position near the light source, and the brightness in the front direction can be increased. In the invention of [6], since the range of the position near the light source is limited to a specific range in which the light source is particularly close to each other, the brightness in the front direction can be further improved. -10-201002982 In the invention of [7], a transmissive image display device capable of displaying a bright image having no unevenness in the front direction even when the number of light sources is arranged is small. [Embodiment] Figs. 1 to 5 show A liquid crystal display device of a configuration (first embodiment) of one of the transmissive image display devices (10) of the invention. In Fig. 1, (1 〇) is a liquid crystal display device, (11) is a liquid crystal cell '(1 2 ) (1 3 ) is a polarizing plate, and (1) is a surface light source device. A polarizing plate (1 2 ) (1 3 ) is disposed on each of the upper and lower sides of the liquid crystal cell ( 1 1 ), and the transmissive image display unit (14) is configured via the constituent members (11) (12) and (13). The surface light source device (1) is disposed on the lower surface side (back surface side) of the lower polarizing plate (13). The surface light source device (1) has a rectangular shape in plan view, and has a thin box-shaped light box (5) that opens the upper side (front side), and three or more of the light boxes (5) that are disposed apart from each other. A plurality of light sources (2) and a deflecting structure plate (3) disposed on an upper side (front side) of the plurality of light sources (2). The deflecting structural plate (3) is fixed to the light box (5) by being placed on the open surface thereof. In the present embodiment, a fluorescent tube is used as the light source (2), but it is not particularly limited. Further, in the present embodiment, for the convenience of explanation, the first light source (21), the second light source (22), the third light source (23), and the fourth light source (24) are displayed as the light source (2). And the 5th-11th - 201002982 light source (2 5 ), which shows the example of using five light sources, but the number of such light sources is not limited to the number of three or more. The deflecting structural plate (3) has a plate that changes the direction of light incident from the light source (2) and incident on the deflecting structural plate (3). In the present invention, the deflecting structural plate (3) is attached to Corresponding to the range of the range between the adjacent two light sources (2) ( 2 ) of the deflecting structural plate (3), light that can be directly incident from the adjacent two light sources (2) (2) (for example, the light of the optical path shown by the solid line in Fig. 2) is simultaneously emitted toward the front side direction (a) of the normal direction of the deflecting structural plate (3). Referring to Fig. 2, when the description is made separately, the range corresponding to the range between the adjacent first light source (2 1 ) and the second light source (22) of the deflecting structural plate (3) is The light (FI) (F2) ' directly incident by the two adjacent light sources (21) (22) is simultaneously emitted toward the front side direction (a) of the normal direction of the deflecting structural plate (3). Further, similarly, the range corresponding to the range between the adjacent second light source (22) and the third light source (23) of the deflecting structural plate (3) is such that two adjacent light sources can be obtained from the adjacent ( 22) (23) The light (F2) (F3) that is directly incident is configured to be emitted toward the front side direction (a) of the normal direction of the deflecting structural plate (3). Further, the same configuration is applied to the other ranges (93) (94)' of the above-described deflecting structural plate (3). The back surface (surface on the light source side) (light incident surface) (3 b ) of the deflection structural plate (3) is formed as a smooth -12-201002982 surface as shown in Fig. 4 . The front surface (the surface on the image display portion side) (light emitting surface) (3 a ) of the deflection structural plate (3) is as shown in FIGS. 1 to 3, and corresponds to the adjacent first light source (21) and second light source. The range (91) between the ranges between (22), the range (9 2 ) corresponding to the range between the adjacent second light source (22) and the third light source (23), and the adjacent third light source (2) 3) a range of the range between the fourth light source (24) and a range (94) corresponding to a range between the adjacent fourth light source (24) and the fifth light source (25) The range of these four (91) (92) (93) (94) are each divided into a small range of 30 (Am; m = 0, 1, 2, 3, 4, 5... ..2 7, 28, 29) (Refer to Figures 2 and 3). The width of each small range (Am; m = 0 to 29) is l〇〇〇"m(lmm). Among the above-described small ranges, the light exit surface (3a) of the small range (A0) located in the up direction of the light source (2) is formed as a smooth surface as shown in Fig. 4 . Accordingly, in this small range (A0), any of the light-based light incident surface (3b) and the light exit surface (3a) incident from the light source (2) directly below is a smooth surface, and is directly oriented toward the deflecting structural plate. (3) The front side direction (a) of the normal direction is emitted. Further, in the 29 small ranges (Ara; m = 1 to 29) remaining in addition to the aforementioned small range (A0) of the deflecting structural plate (3), the light exiting surface (3a) is as shown in Fig. 4, The cross-sectional shape is formed by a triangle. The number of 稜鏡 (diagonal) in each small range (Am; m = 1 to 29) is 20 each. In addition, the interval of the 稜鏡 (triangle) (U ' t2 ..... t28, t29) is 50 μm. In addition, the composition is in a small area ( -13- 201002982
Am; m=l〜29)之棱鏡的三角形之2個斜邊則構成法線（ a)之角度（am、y3m)乃設定爲表1所示的値。然而， 同樣小範圍內之三角形係角度α m、角度点m乃同一。即 ，同樣小範圍內之三角形係其剖面形狀乃完全相同。例如 ，小範圍A1之稜鏡（三角形）係全部設定成α二85·1度、 0 = 24.2 度、丈=50#111〇 [表1] m Οί m (度） β m (度〉 tm (#m) m am (度） β rr\ (度） tm (/i m) 1 85. 4 23. 2 50 I 16 36. 9 40. 6 50 2 80. 8 23. 9 50 17 35. 2 42. 8 50 3 76. 3 24. 5 50 18 33. 7 45. 1 50 —4 71. 9 25, 3 50 19 32. 3 47. 6 50 .-· 5 67. 8 26. 0 50 20 31. 0 50-4 50 6 63. 8 26. 9 50 21 29. 9 53. 4 50 7 60. 1 27. 8 50 22 28. 8 56. 6 50 —8 56. 6 28. 8 50 23 27. 8 60. 1 50 9 53. 4 29. 9 50 24 26. 9 63. 8 50 10 50. 4 31.0 50 25 26. 0 67. 8 50 11 47. 6 32. 3 50 26 25. 3 71. 9 50 ^ 12 45. 1 33. 7 50 27 24. 5 76. 3 50 13 42. 8 35. 2 50 28 23. 9 80. 8 50 14 40. 6 36. 9 50 29 23. 2 85, 4 50 15 38. 7 38, 7 50 如此，偏向構造板（3)之光入射面（3b)乃遍佈於 其全面而加以形成爲平滑面之同時，亦包含表1 ’如上述 之特定構成之稜鏡乃因形成於偏向構造板（3 )之光出射 面（3a)之故，於對應於在該偏向構造板（3)之鄰接的2 個光源之間的範圍之範圍，可使從該鄰接之2個光源直接 -14- 201002982 射入的光，同時朝向該偏向構造板（3 )之 面側方向（a )加以射出。隨之，假設即使^ 置數量少，亦可以高亮度射出出射光於正面 可藉由透過型畫像顯示部（14)而對於正面 度的畫像。 本發明之透過型畫像顯示裝置（10)係 下之構成。即，於對應於在該偏向構造板（ 個光源（2) (2)之間的範圍之範圍，將遮 2個光源以外之光源所放射的光直接射入者 (8 )，設置於光源（2 ) ( 2 )之間。 參照圖2之同時個別進行說明時，於對 向構造板（3)之鄰接的第2光源（22)與舞 之間的範圍之範圍（92 )，將遮蔽從該鄰g 2 2 )( 2 3 )以外之光源之第1光源（2 1 )所 射入者之遮蔽部（8 A )，設置於第1光源（2 (22 )之間。於對應於在前述偏向構造板（ 第2光源（22 )與第3光源（23 )之間的範圍 ，將遮蔽從該鄰接之4個光源（22) (23) 第4光源（24 )所放射的光直接射入者之遮 設置於第3光源（23)與第2光源（24)之間 另外，於對應於在前述偏向構造板（3 ) 光源（23 )與第4光源（24 )之間的範圍之 將遮蔽從該鄰接之2個光源（23 )( 24 )以夕 光源（22)所放射的光直接射入者之遮蔽部 法線方向的前 七源（2 )之配 方向，由此， 方向顯示高亮 亦更具備如以 3 )之鄰接的2 蔽從該鄰接之 之光學遮蔽部 應於在前述偏 I 3光源（23 ) I之2個光源（ 放射的光直接 1 )與第2光源 :3 )之鄰接的 之範圍（92 ) 以外之光源之 蔽部（8 C )， 〇 之鄰接的第3 範圍（93 )， t之光源之第2 (8B )，設置 -15- 201002982 於第2光源（22)與第3光源（23)之間。另外，於 在前述偏向構造板（3)之鄰接的第3光源（23 ) 1 源（24)之間的範圍之範圍’將遮蔽從該奚 個光源（23 )( 24 )以外之光源之第5光源（25 ) 的光直接射入者之遮蔽部（8D) ’設置於第4光源 與第5光源（25 )之間。 在本實施形態中，前述折板狀之遮蔽部（8A) (8C ) (8D)係均沿著前述光源（2)之長度方向 深度方向）而延伸。 另外，在本實施形態中，前述遮蔽部（8 A )( 8C ) ( 8 D )之前面（偏向構造板側的面）的全面乃 白色擴散反射面。 但在上述面光源裝置（1)中’因於對應於在 造板（3 )之鄰接的2個光（2 ) ( 2 )源之間的範圍 ’設置遮蔽從該鄰接之2個光源以外的光源所放射 接射入之遮蔽部（8)之故’可阻止對於成爲亮度 一性的原因之光（例如，通過在圖2以點線所示之 光）直接射入於偏向構造板（3 ) ’由此，可充分 從法線方向偏移之特定角度範圍之亮度不均一性產 而可射出無亮度不勻之均一的光者，即，可以高亮 無亮度不勻之均一的光。隨之’如根據上述液晶顯 (10) ’可顯示無不勻，均一局売度之畫像者。 作爲前述遮蔽部（8) ’係如爲達成上述遮蔽 構成’其形狀或構造等係無特別加以限定。 對應於 运第4光 15接之2 所放射 (24 ) (8B ) (在圖1 8B )( 形成成 偏向構 之範圍 的光直 之不均 光路的 控制在 生，進 度射出 示裝置 機能之 -16- 201002982 另外’在上述實施型態之中，遮蔽部（8)之前面（ 偏向構造板側的面）乃形成於擴散反射面，但並無特別限 定於如此之構成，例如，亦可形成於擴散透過面，吸收面 〇 更且，本發明之透過型畫像顯示裝置（10)係亦具備 如以下之構成。即，在前述燈箱（5 )內，於前述第2光源 (22 )之背面25側，設置有將從該第2光源（22 )朝向背 面側所放射的光，朝向該第2光源（2 2 )或朝向該第2光源 (22 )之附近位置而反射之反射面部（7 )(參照圖i〜3 ) 。在本實施型態中，其反射面部（7 )係從前述第2光源（ 22 )之背面側延伸至該第2光源（22 )之正面視左側的略 側方及正面視右側的略側方而加以形成（參照圖3 )。前 述反射面部（7)係曲率中心（Y)乃存在於該第2光源（ 22 )之附近位置的1個曲面反射面所成（參照圖5 )。然而 ，前述反射面部（7)係亦可爲曲率中心（Y)乃存在於該 光源範圍（Z )之1個曲面反射面所成之構成。 前述反射面部（7)係均於前述第2光源（22)之背面 側，沿著該光源（22 )之長度方向（在圖1深度方向）而 加以延伸設置。即，以覆蓋從前述第2光源（22)之長度 方向的一端部之背面側至另一端部之背面側之型態，配置 長的反射面部（7 )。 對於前述第1，3〜5光源（ 2 1 ) ( 23 ) ( 24 ) ( 25 )， 亦於此等各光源（ 2 1 ) ( 23 ) ( 24 ) ( 25 )之背面側’個 同樣地配置與前述相同構成之反射面部（7 )(參照圖1〜3 -17- 201002982 另外，在本實施形態中，前述反射面部（7 )之前面 (偏向構造板側的面）的全面乃形成成白色反射面。 又，連接之反射面部（7 ) ( 7 )係均藉由折板狀之遮 蔽不（8 )而加以連接（參照圖1〜3 )。即，在本實施形態 中，前述反射面部（7)與前述遮蔽部（8)作爲一體成形 所成之一體成形板（1 9 )乃成爲上述之配置關係地，配置 於燈箱（5 )內。 作爲一體成形如上述之反射面部（7 )與遮蔽部（8 ) 所成之一體成形板（1 9 )的材料，係並無特別加以限定， 但例如可舉出合成樹脂，金屬等。另外，作爲前述一體成 形板（1 9 )之成形手法，係並無特別加以限定，但例如可 舉出押出成形，射出成形，沖壓成形等。 然而，在上述實施型態之中，雖採用一體成形反射面 部（7 )與遮蔽部（8 )之構成，但並無特別限定如此之構 成’例如亦可爲未連接反射面部（7 )與遮蔽部（8 )而另 外加以形成。 另外，在上述實施型態之中，反射面部（7)之前面 乃形成於白色反射面，但並無特別限定於如此之構成，例 如，亦可形成於鏡面反射面。 但在上述面光源裝置（1 )中，於光源（2 )的背面側 ，因設置有將從該光源（2 )朝向背面側加以放射的光， 朝向該光源（2 )或朝向該光源（2 )附近位置加以反射之 反射面部（7 )，故如圖3所示，從光源（2 )朝向背面側 -18- 201002982 所放射的光乃由前述反射面部（7)所反射而成之反 (在圖3附箭頭點線）係因以接近於從該光源（2 )朝 面側所放射而直接射入於偏向構造板（3 )的直接光 圖3附箭頭實線）之路徑的路徑’射入於偏向構造板 之故，該反射光亦朝向偏向構造板（3 )之法線方向 面側方向（a )而加以射出。如此，不只從光源（2 ) 前面側所放射而直接射入於偏向構造板（3 )的光， 光源（2 )朝向背面側所放射的光亦歷經由反射面部 之反射而可朝向偏向構造板（3 )之法線方向的前面 向（a)而加以射出之故，更可使面光源裝置（1)之 方向的亮度提昇者。 更且，前述反射面部（7)乃作爲不只光源（2) 面側範圍，而從該背面側延伸至該光源（2 )之左側 側方範圍及右側的略側方範圍而加以形成，且從前述 (2 )朝向左右兩側的略側方所放射的光亦由前述反 部（7 )所反射，朝向該光源（2 )或朝向該光源（2 近位置加以反射之構成之故，不只從光源（2)朝向 側所放射的光，而從光源（2 )朝向左右兩側之略側 放射的光亦可朝向偏向構造板（3)之法線方向的前 方向（a)而加以射出，由此更可使正面方向的亮度 者。隨之’如根據上述液晶顯示裝置（10)，可朝向 方向，均一顯示高亮度之畫像者。 然而，在未具備前述反射面部（7)之構成的面 裝置中，如圖1 6所示，從光源（2 )朝向背面側與左 射光 向前 (在 (3 ) 的前 朝向 而從 (7 ) 側方 正面 之背 的略 光源 射面 )附 背面 方所 面側 提昇 正面 光源 右兩 -19- 201002982 側的略側方所放射的光係在燈箱（5 )之內面等加以反射 而入射至偏向構造板（3 )。其偏向構造板（3 )係爲於對 應於在該偏向構造板（3 )之鄰接的2個光源（2 )( 2 )之 間的範圍之範圍，呈可使從該鄰接之2個光源（2 ) ( 2 ) 直接射入的光（例如，通過在圖1 6以實線顯示之光路的光 )，同時朝向該偏向構造板（3 )之法線方向的前面側方 向（a )加以射出地加以設計之構成之故，如圖1 6所示， 使反射於無秩序之方向而入射至偏向構造板（3 )之反射 光（以附箭頭點線所示），朝向於偏向構造板（3 )之法 線方向的前面側方向（a )加以射出者爲困難。即，對於 未具備前述反射面部（7 )之情況，反射光係在通過偏向 構造板（3)之後馬上射出於無秩序之方向，將反射光朝 向正面方向加以射出者爲困難。如此，在未具備前述反射 面部（7 )之構成中，雖可控制從光源（2 )直接射入於偏 向構造板（3 )之光的出射方向，但因無法控制從光源（2 )出現加以反射，以無秩序的方向入射至偏向構造板（3 )之反射光的出射方向，故無法對於正面方向得到充分的 亮度者。 在本發明中，作爲前述反射面部（7 )，係如爲將從 光源（2 )朝向背面側所放射的光，朝向該光源（2 )或朝 向該光源（2 )附近位置加以反射之機能者，其形狀或構 造等係並無特別加以限定。 例如，亦可採用具備如圖6~9所示之反射面部（7 )的 構成（第2實施形態）。在其第2實施形態，係在於各光源 -20- 201002982 (2 )的背面側，設置有將從該光源（2 )朝向背面側加以 放射的光，朝向該光源（2 )或朝向該光源（2 )附近位置 加以反射之反射面部（7 )的點，與前述第1實施形態同樣 ，但在本第2實施形態中，前述反射面部（7 )係採用具有 連接曲率中心（Y1 )存在於第2光源（22 )之附近位置之 第1曲面反射面（7a)，和曲率中心（Y2)存在於第2光源 (22)之附近位置之第2曲面反射面（7b)而成之反射面 的構成（參照圖9 )。 然而，前述反射面部（7)係亦可爲採用具有連接曲 率中心（Y1 )存在於第2光源（22 )之範圍（Z )之第1曲 面反射面（7a)，和曲率中心（Y2)存在於第2光源（22 )之範圍（Z)之第2曲面反射面（7b)而成之反射面的構 成。另外，在本第2實施型態中，前述反射面部（7)係從 前述第2光源（22 )之背面側延伸至該第2光源（22 )之正 面視左側的略側方及正面視右側的略側方而加以形成（參 照圖8 )。 另外，亦可採用具備如圖10〜13所示之反射面部（7) 的構成（第3實施形態）。在其第3實施形態，係在於各光 源（2)的背面側’設置有將從該光源（2)朝向背面側加 以放射的光’朝向該光源（2 )或朝向該光源（2 )附近位 置加以反射之反射面部（7 )的點，與前述第2實施形態同 樣，但在本第3實施形態中，前述反射面部（7)係採用曲 率中心（Y)存在於該光源（2)之附近位置之丨個曲面反 射面所成之構成（參照圖1 3 )。然而，前述反射面部（7 -21 - 201002982 )係亦可爲曲率中心（γ)乃存在於該光源範圍（z)之1 個曲面反射面所成之構成。然而，在圖10~13，對於與前 述圖1〜5之第1實施形態同一之構成部，附上同一符號，省 略其說明。 或者，亦可採用具備如圖14所示之反射面部（7)的 構成（第4實施形態）。其第4實施形態，係在於各光源（ 2 )的背面側’設置有將從該光源（2 )朝向背面側加以放 射的光’朝向該光源（2 )或朝向該光源（2 )附近位置加 以反射之反射面部（7 )的點，與前述第1〜3實施形態同樣 ’但在本第4實施形態中’係採用前述反射面部（7 )係在 該光源（2 )之背面側，連接呈圍著該光源（2 )地加以配 置之複數的平面反射面（7c)之構成所成，在垂直交叉於 光源（2 )之長度方向的面之剖面視，包含連接鄰接之平 面反射面（7c )( 7c )的頂點（9 )…及最左側之平面反射 面（7c )的非連接之頂點（9A )，以及最右側之平面反射 面（7c )的非連接之頂點（9B )之所有的最小之假想圓（ U )之中心（Y3 )乃存在於該光源範圍（z )或該光源（2 )附近位置之構成。另外，在其第4實施形態中，包含前 g己頂點（9) (9) (9) (9) (9) (9A) (9B)之所有 最小之假想圓（U )係成爲通過此等所有的頂點（9 ) (9 )(9) (9) (9) (9A) ( 9B)。即，前述反射面部（7 )之內面形狀係與將正十二角形作爲2等份之一方的形狀 相同之形狀。然而’在圖丨4，對於與前述第1實施形態同 一之構成部’附上同一符號，省略其說明。 -22- 201002982 或者，亦可採用具備如圖1 5所示之反射面部（7 ) 構成（第5實施形態）。其第4實施形態，係在於各光源 2 )的背面側，設置有將從該光源（2 )朝向背面側加以 射的光，朝向該光源（2 )或朝向該光源（2 )附近位置 以反射之反射面部（7 )的點，以及前述反射面部（7 ) 在該光源（2)之背面側，連接呈圍著該光源（2)地加 配置之複數的平面反射面（7c)之構成所成，在垂直交 於光源（2 )之長度方向的面之剖面視，包含連接鄰接 平面反射面（7c) (7c)的頂點（9)...及最左側之平面 射面（7c )的非連接之頂點（9A )，以及最右側之平面 射面（7c )的非連接之頂點（9B )之所有的最小之假想 (U)之中心（Y4)乃存在於該光源範圍（Z)或該光 (2 )附近位置之構成的點，與前述第4實施形態同樣， 在第5實施形態中，在包含前記頂點（9 ) (9)(9)( )(9B )之所有最小之假想圓（U )係成爲通過此等所 的頂點（9) (9) (9) ( 9A ) (9B)之中的一部分的 的點，則與前述第4實施形態不同。即，包含前記頂點 所有的最小之假想圓（U )係中央之最下位置（離偏向 造板最遠的位置）的頂點係未通過，而通過剩餘之4個 點（9) (9) ( 9A) (9B)的圓。然而，在圖15，對於 前述第1實施形態同一之構成部，附上同一符號，省略 說明。 作爲前述反射面部（7 )，係如上述之第1 ~3實施形 ，具備1或複數曲率中心存在於該光源範圍（Z)或該光 的 ( 放 加 係 以 叉 之 反 反 圓 源 但 9 A 有 圓 之 構 頂 與 其 態 源 -23- 201002982 (2)附近位置之曲面反射面所成之構成，但在可更提昇 正面方向之亮度上爲佳。 另外，作爲前述反射面部（7)，如上述第4及第5實 施形態，在該光源（2 )之背面側，呈圍著該光源（2 )地 加以配置之複數的平面反射面（7c)，針對在垂直交叉於 該光源（2)的長度方向的面之剖面視，具備包含此等平 面反射面（7c)之兩端的頂點（9) ( 9 A ) (9B)所有之 最小的假想圓（U )之中心（Y3 ) ( Y4 )乃存在於該光源 範圍（Z)或該光源（2)附近位置之複數的平面反射面（ 7c)所成之構成，但在可更提昇正面方向之亮度上爲佳。 前述反射面部（7 )係有必要將從該光源（2 )朝向背 面側加以放射的光，朝向該光源（2 )或朝向該光源（2 ) 附近位置加以反射地所構成，但作爲前述光源（2 )之附 近位置的範圍（領域）（W )，係將前述偏向構造板（3 )與前述光源（2 )之離間間隔作爲「Η」，將鄰接之光源 (2 ) ( 2 )之間的中心間距離作爲「L」時，於前述偏向 構造板（3)之法線方向，以平行至通過該光源（2)之中 心位置（G )之第1假想直線（Q )爲止之垂直距離乃0.1 5 L 以下，且對於前述偏向構造板（3 )而言，以平行至通過 該光源（2 )之中心位置（G )之第2假想直線（J )爲止之 垂直距離乃0.1 5 Η以下之範圍，從該光源（2 )之中心位置 (G)之距離乃除了該光源（2)之半徑以下之光源範圍（ 即，光源存在的範圍）（Ζ )的範圍者爲佳（參照圖5，9 ，1 3 )。對於在前述反射面部（7 )所反射的反射光乃呈 -24- 201002982 通過如此之特定範圍之光源附近位置之構成情況，更可使 正面方向的亮度提昇者。 前述偏向構造板（3 )之厚度（s )雖未特別加以限定 ，但通常設定爲O.hO.lSmm，理想爲〇.5~10nm爲佳，更佳 者爲1~5 nm。 作爲前述偏向構造板（3)，係通常使用由透明樹脂 ’透明玻璃等之透明材料所成之透明板。作爲前述透明樹 脂層係無特別加以限定，但例如可舉出聚碳酸酯樹脂、 ABS樹脂（丙烯腈丁二烯苯乙烯共聚物樹脂）、異丁烯樹 脂、MS樹脂（異丁烯酸甲醇苯乙烯共聚物樹脂）、聚苯 乙烯樹脂、AS樹脂（丙烯腈一苯乙烯共聚物樹脂）、聚烯 烴樹脂（例如聚乙烯、聚丙烯等）等。亦可於前述偏向構 造板（3) ’分散含有光擴散劑（光擴散粒子）。 作爲前述偏向構造板（3)之稜鏡（三角形）成形手 法，係並無特別加以限定，但例如可舉出押出法，沖壓法 ’切削法’射出成形法等。其中，從生產效率的觀點，以 壓出法加以製作者爲佳。 作爲前述光源（2 )係無特別加以限定，但例如可舉 出螢光管（冷陰極管），鹵素燈，鎢絲燈等之直管狀燈， 發光二極體（LED )等之點光源等。 另外’鄰接之光源（2 ) ( 2 )之中心（G ) ( G )間 距離（L)係從省電力化的觀點，設定爲50min者爲佳 。另外’前述偏向構造板（3)與前述光源（2)之距離（ Η )係從薄型化的觀點，設定爲5〜5 Omm者爲佳。 -25- 201002982 有關本發明之面光源裝置（i)，透過型畫像顯示裝 置（10)係亦包含於構成此等之3個以上之複數的光源之 中至少1個光源（2 )之背面側，設置有將從該光源（2 ) 朝向背面側所放射的光，朝向該光源（2 )或朝向該光源 (2)之附近位置而反射之反射面部（7)之構成。當然不 用說採用，於構成面光源裝置（1)或透過型畫像顯示裝 置（10)之3個以上之複數的光源之各背面側（所有的光 源之背面側），設置有將從該光源（2 )朝向背面側所放 射的光，朝向該光源（2 )或朝向該光源（2 )之附近位置 而反射之反射面部（7)之構成者爲佳。 另外，作爲前述反射面部（7 ) ’係亦可採用在例如 作爲光源（2 )而使用相互呈平行狀地加以配置之複數的 直管狀燈之情況，呈連接此等複數之直管狀光源（2 )之 長度方向的中央部地，在垂直交叉於光源（2 )之狀態’ 設置成略帶狀之構成（只於各光源之長度方向的中央部的 背面側，配置反射面部之構成）。 另外，例如在圖2，7，11之左右方向乃呈成爲面光源 裝置（1)或透過型畫像顯示裝置（10)之左右方向（水 平方向）地加以設計亦可，或在圖2’ 7 ’ 11之左右方向乃 呈成爲面光源裝置（1)或透過型畫像顯示裝置（10)之 垂直方向（上下方向）地加以設計亦可’並無特別加以限 定。例如，透過型畫像顯示裝置（10)係左右方向（水平 方向）乃需要作爲廣視野角之另一方面’對於垂直方向（ 上下方向）係有設計爲窄視野角之情況，但對於如此之情 -26- 201002982 況，例如在圖2’ 7’ 11之左右方向乃如呈成爲面光源裝置 (1)或透過型畫像顯示裝置（10)之垂直方向（上下方 向）地加以設計即可。 有關本發明之面光源裝置（1)，透過型畫像顯示裝 置（1 〇 )係並無特別限定於上述實施形態之構成，如爲在 申請專利範圍內，在不脫離其精神，亦可容許做任何設計 變更。 實施例 接著，對於本發明之具體實施例加以說明，但本發明 並非特別限定於此等實施例之構成。 <實施例1 > 從在構成具備前述第1實施形態構成（參照圖1〜5 )之 液晶顯示裝置（1 〇 )的情況之偏向構造板（3 )，朝向觀 測者所射出的光之亮度的角度分布係出射光乃將偏向構造 板（3 )之法線方向的前面側方向（a )作爲中心，充分地 集光爲±約12°之範圍內，而充分提昇正面方向之亮度。另 外，將偏向構造板（3 )之法線方向的前面側方向（a )作 爲中心，對於±約1 〇 °之範圍內之方向，射出全射出光的約 6 3%。 然而，一般，在液晶電視等中，視聽者係從液晶電視 ，在離其畫面高度之3倍程度距離位置而視爲佳，對於此 情況，視聽者在看液晶電視的畫面之最上位置時的角度係 -27- 201002982 從水平上仰約ίο。，而在看同畫面之最下位置時之角度係 從水平下仰約10°。 在實施例1之液晶顯示裝置’各種設計條件係作爲與 前述情況同一（參照表1)。然而’鄰接之光源（2) (2 )之間的間隔（L )係設定爲30mm，從遮蔽部（8 )的頂 點至偏向構造板（3)爲止之距離（T)係設定爲10mm ’ 從光源（2)至偏向構造板（3)爲止之距離（H)係設定 爲19mm，光源（2 )之直徑（2r )係設定爲2mm，前面側 乃白色反射面之反射面部（7)的曲面反射面的曲率半徑 (R )係設定爲3mm。另外，偏向構造板（3 )係作爲由折 射率1.57之MS樹脂（透明樹脂）製之厚度（S) 2mm之樹 脂板所成之構成。然而，反射面部（7)之曲面反射面的 曲率中心（Y )係存在於從光源（2 )之中心位置（G )沿 著第1假想線（Q)移動1mm於前面方向之位置。 [產業上之可利用性] 本發明之面光源裝置係適合作爲透過型畫像顯示裝置 用之背照光而使用’但並未特別限定於如此之用途者。 【圖式簡單說明】 圖1乃顯示關於本發明之透過型畫像顯示裝置之一實 施型態的模式側面圖。 圖2乃顯示關於本發明之面光源裝置之一實施型態（ 第1實施型態）的模式側面圖。在此圖2中，爲了說明遮蔽 -28- 201002982 部之機能而附記必要的光路，以附箭頭實線 造板射出的光之光路同時，以附箭頭點線顯 均一性之原因的光之光路。 圖3乃顯示與圖2相同之面光源裝置之第 模式側面圖。在此圖3中，爲了說明反射面] 記必要的光路’以附箭頭實線顯示從光源放 而直接入射至偏向構造板，從偏向構造板射 同時’以附箭頭點線顯不從光源朝向背面側 光路。 圖4乃擴大顯示圖2之面光源裝置之偏向 分之側面圖。 圖5乃擴大顯示圖2之面光源裝置之光源 面圖。 圖6乃顯示關於本發明之透過型畫像顯： 實施型態的模式側面圖。 圖7乃顯示關於本發明之面光源裝置之； (第2實施型態）的模式側面圖。在此圖7中 蔽部之機能而附記必要的光路，以附箭頭實 構造板射出的光之光路同時，以附箭頭點線 不均一性之原因的光之光路。 圖8乃顯示與圖7相同之面光源裝置之第 模式側面圖。在此圖8中，爲了說明反射面丨 記必要的光路’以附箭頭實線顯示從光源放 而直接入射至偏向構造板，從偏向構造板射 顯示從偏向構 示成爲亮度不 ;1實施型態的 部之機能而附 射出於前面側 出的光之光路 所放射的光之 構造板之一部 及其附近之側 承裝置之其他 其他實施型態 ，爲了說明遮 線顯示從偏向 顯示成爲亮度 2實施型態的 部之機能而附 射出於前面側 出的光之光路 -29- 201002982 同時’以附箭頭點線顯示從光源朝向背面側所放射的光之 光路。 圖9乃擴大顯示圖7之面光源裝置之光源及其附近之側 面圖。 圖10乃顯示關於本發明之透過型畫像顯示裝置之又其 他實施型態的模式側面圖。 圖11乃顯示關於本發明之面光源裝置之其他實施型態 (第3實施型態）的模式側面圖。在此圖11中，爲了說明 遮蔽部之機能而附記必要的光路，以附箭頭實線顯示從偏 向構造板射出的光之光路同時，以附箭頭點線顯示成爲亮 度不均一性之原因的光之光路。 圖12乃顯示與圖7相同之面光源裝置之第3實施型態的 模式側面圖。在此圖1 2中，爲了說明反射面部之機能而附 記必要的光路’以附箭頭實線顯示從光源放射出於前面側 而直接入射至偏向構造板’從偏向構造板射出的光之光路 同時’以附箭頭點線顯不從光源朝向背面側所放射的光之 光路。 圖13乃擴大顯示圖11之面光源裝置之光源及其附近之 側面圖。 圖14乃擴大顯示在關於本發明之面光源裝置之又其他 實施型態（第4實施型態）之反射面部極其附近的側面圖 〇 圖15乃擴大顯示在關於本發明之面光源裝置之又其他 實施型態（第5實施型態）之反射面部極其附近的側面圖 -30- 201002982 圖1 6乃顯示比較例1之面光源裝置之構成的模式側面 圖。在此圖1 6中，以附箭頭實線顯示從光源放射出於前面 側而直接入射至偏向構造板，從偏向構造板射出的光之光 路。另外，以附箭頭點線顯示從光源朝向背面側所放射的 光之光路。 【主要元件符號說明】 1 :面光源裝置 2 :光源 3 :偏向構造板 7 :反射面部 7a:第1曲面反射面 7b ··第2曲面反射面 7c:平面反射層面 8 :遮蔽部 9、9A、9B :頂點 10:液晶顯示裝置（透過型畫像顯示裝置） 14:透過型畫像顯示部 1 9 :—體成形板 2 1 :第1光源 22 :第2光源 2 3 :第3光源 24 :第4光源 -31 - 201002982 2 5 :第5光源 91〜94 :對應範圍 a :法線方向之前面方向 G :光源之中心位置 Q :第1假想直線 J :第2假想直線 U :假想圓 Y、Y1、Y 2 :曲率中心 Y 3、Y 4 :假想圓之中心 W :光源附近位置的範圍（領域） Z :光源範圍 -32-Am; m=l~29) The two oblique sides of the triangle of the prism form the normal (a) angle (am, y3m) which is set to 値 shown in Table 1. However, the triangle angle α m and the angle point m in the same small range are the same. That is, the triangles in the same small range have the same cross-sectional shape. For example, the 范围 (triangle) of the small range A1 is all set to α 2 85·1 degrees, 0 = 24.2 degrees, and = 50#111 〇 [Table 1] m Οί m (degrees) β m (degrees > tm ( #m) m am (degrees) β rr\ (degrees) tm (/im) 1 85. 4 23. 2 50 I 16 36. 9 40. 6 50 2 80. 8 23. 9 50 17 35. 2 42. 8 50 3 76. 3 24. 5 50 18 33. 7 45. 1 50 —4 71. 9 25, 3 50 19 32. 3 47. 6 50 .-· 5 67. 8 26. 0 50 20 31. 0 50-4 50 6 63. 8 26. 9 50 21 29. 9 53. 4 50 7 60. 1 27. 8 50 22 28. 8 56. 6 50 —8 56. 6 28. 8 50 23 27. 8 60 1 50 9 53. 4 29. 9 50 24 26. 9 63. 8 50 10 50. 4 31.0 50 25 26. 0 67. 8 50 11 47. 6 32. 3 50 26 25. 3 71. 9 50 ^ 12 45. 1 33. 7 50 27 24. 5 76. 3 50 13 42. 8 35. 2 50 28 23. 9 80. 8 50 14 40. 6 36. 9 50 29 23. 2 85, 4 50 15 38 7 38, 7 50 Thus, the light incident surface (3b) of the deflecting structural plate (3) is formed over the entire surface thereof to form a smooth surface, and also includes the specific composition of Table 1 ' Formed on the light exit surface (3a) of the deflecting structural plate (3), corresponding to the deflecting structural plate (3) The range of the range between the adjacent two light sources can be directly from the adjacent two light sources directly from -14 to 201002982, toward the surface side direction (a) of the deflecting structural plate (3). In the meantime, it is assumed that even if the number of the electrodes is small, it is possible to emit an image with a high degree of brightness on the front side by the transmissive image display unit (14). The transmissive image display device (10) of the present invention. a configuration in which the light emitted by the light source other than the two light sources is directly incident in the range corresponding to the range between the deflecting plates (the light sources (2) and (2) (8) Between the light sources (2) and (2). When referring to Fig. 2, the range of the range between the adjacent second light source (22) and the dance of the opposite structural plate (3) (92) The shielding portion (8 A ) that shields the first light source (2 1 ) from the light source other than the neighboring g 2 2 )( 2 3 ) is disposed between the first light source (2 (22) . Corresponding to the range between the second light source (22) and the third light source (23), the shielding is radiated from the adjacent four light sources (22) (23) and the fourth light source (24). The light direct emitter is disposed between the third light source (23) and the second light source (24), and corresponds to the light source (23) and the fourth light source (24) in the deflecting structural plate (3). The range between the two sources (23) (24) of the adjacent light source (22) directly enters the direction of the first seven sources (2) in the normal direction of the shielding portion of the shielding portion. Therefore, the direction display highlighting is further provided as follows: 3) the adjacent 2 masks from the adjacent optical shielding portion should be at the two light sources of the aforementioned I 3 light source (23) I (radiating light directly 1) The shielding portion (8 C ) of the light source other than the range (92) adjacent to the second light source: 3), the third range (93) adjacent to the 〇, and the second (8B) of the light source of t, -15 - 201002982 between the second light source (22) and the third light source (23). In addition, the range of the range between the source (24) of the adjacent third light source (23) 1 adjacent to the deflection structural plate (3) will shield the light source from the light source (23) (24) The shielding portion (8D) of the light direct emitter of the light source (25) is disposed between the fourth light source and the fifth light source (25). In the present embodiment, the flap-shaped shielding portions (8A) (8C) (8D) extend in the longitudinal direction of the light source (2) in the longitudinal direction. Further, in the present embodiment, the entire front surface (the surface on the side of the structural plate) of the shielding portion (8 A ) ( 8C ) ( 8 D ) is a white diffuse reflection surface. However, in the above-described surface light source device (1), "the range corresponding to the two light (2) (2) sources adjacent to the slab (3) is shielded from the adjacent two light sources. The light-emitting portion of the shielding portion (8) is prevented from being incident on the deflecting structure plate (for example, by the light shown by the dotted line in FIG. 2). "Thus, the brightness unevenness of a specific angle range which is sufficiently shifted from the normal direction can be produced, and a uniform light having no unevenness in brightness can be emitted, that is, a uniform light having no unevenness in brightness can be highlighted. Then, according to the above liquid crystal display (10), it is possible to display a portrait with no unevenness and a uniform degree. The shape, structure, and the like of the shielding portion (8)' are not particularly limited as long as the shielding structure is achieved. Corresponding to the second radiation of the fourth light 15 (24) (8B) (in Figure 18B) (the control of the light-to-uneven optical path formed in the range of the deflection structure is in progress, the progress of the device is shown to be 16) - 201002982 In addition, in the above embodiment, the front surface (the surface on the side of the structural plate) of the shielding portion (8) is formed on the diffuse reflection surface, but is not particularly limited to such a configuration, and may be formed, for example. The transmissive transmission surface and the absorption surface are further provided. The transmissive image display device (10) of the present invention also has a configuration in which the light source (5) is on the back surface 25 of the second light source (22). The side is provided with a light that is radiated from the second light source (22) toward the back side, and is reflected toward the second light source (2 2 ) or toward the vicinity of the second light source (22). (refer to Figures i to 3) In the present embodiment, the reflecting surface portion (7) extends from the back side of the second light source (22) to the side of the front side of the second light source (22). And the front side is formed on the right side of the right side (see Fig. 3). The aforementioned reflective surface ( 7) The center of curvature (Y) is formed by one curved reflecting surface existing in the vicinity of the second light source (22) (see Fig. 5). However, the reflecting surface (7) may be a center of curvature ( Y) is formed by one curved surface of the light source range (Z). The reflective surface portion (7) is on the back side of the second light source (22) along the light source (22) The longitudinal direction (in the depth direction of FIG. 1) is extended, that is, the long reflection side is disposed so as to cover the back side from the one end portion in the longitudinal direction of the second light source (22) to the back side of the other end portion, and long reflection is arranged. Face (7). For the aforementioned first, third to fifth light sources (2 1 ) ( 23 ) ( 24 ) ( 25 ), also on the back side of each of the light sources ( 2 1 ) ( 23 ) ( 24 ) ( 25 ) The reflecting surface portion (7) having the same configuration as described above is disposed in the same manner (see FIGS. 1 to 3 -17 to 201002982. In addition, in the present embodiment, the front surface (the surface on the side of the structural plate) of the reflecting surface portion (7) is disposed. It is formed into a white reflective surface. In addition, the connected reflective surface (7) (7) is not covered by the flap shape (8) In addition, in the present embodiment, the one-piece forming plate (1 9 ) in which the reflecting surface portion (7) and the shielding portion (8) are integrally molded is the above-described arrangement. The material is disposed in the light box (5). The material for integrally forming the one-piece forming plate (1 9 ) formed by the reflecting surface portion (7) and the shielding portion (8) is not particularly limited, but for example A synthetic resin, a metal, etc. are mentioned. In addition, the forming method of the integrally formed plate (1 9 ) is not particularly limited, and examples thereof include extrusion molding, injection molding, and press molding. However, in the above-described embodiment, the configuration of the reflective surface portion (7) and the shielding portion (8) is integrally formed, but the configuration is not particularly limited. For example, the reflective surface portion (7) and the shadow portion may not be connected. Part (8) is additionally formed. Further, in the above embodiment, the front surface of the reflecting surface portion (7) is formed on the white reflecting surface, but is not particularly limited to such a configuration, and may be formed, for example, on the specular reflecting surface. However, in the above-described surface light source device (1), light emitted from the light source (2) toward the back side is provided on the back side of the light source (2), and is directed toward the light source (2) or toward the light source (2). The reflecting surface (7) reflected at a nearby position, as shown in Fig. 3, the light emitted from the light source (2) toward the back side -18-201002982 is reflected by the reflecting surface (7) The dotted line in Fig. 3 is a path which is close to the path of the direct light pattern 3 attached to the deflecting structure plate (3) and the solid line of the arrow attached to the deflecting structure plate (3). After being incident on the deflecting structure, the reflected light is also emitted toward the surface direction (a) of the normal direction of the structural plate (3). In this way, not only light emitted from the front side of the light source (2) but also directly incident on the deflecting structure plate (3), and light emitted from the light source (2) toward the back side can also be directed toward the deflecting structural plate via reflection of the reflecting surface. (3) The front of the normal direction is emitted to (a), and the brightness of the direction of the surface light source device (1) can be increased. Further, the reflecting surface portion (7) is formed not only from the surface side of the light source (2) but also from the back side to the left side of the light source (2) and the lateral side of the right side, and is formed from The light emitted by the above (2) to the side of the left and right sides is also reflected by the opposite portion (7), and is directed toward the light source (2) or toward the light source (2 is reflected at a near position, not only from The light emitted by the light source (2) toward the side, and the light emitted from the light source (2) toward the left and right sides may be emitted toward the front direction (a) of the normal direction of the structural plate (3). Therefore, the brightness of the front side can be further increased. With the liquid crystal display device (10), the image of the high brightness can be uniformly displayed in the direction. However, the configuration of the reflective surface (7) is not provided. In the surface device, as shown in Fig. 16, the light source (2) is directed toward the back side and the left light is directed forward (the front side of (3) and the side of the side of the side (7) is slightly light source). Side of the side of the side to raise the front light source right two -19- 201002982 side The light radiated from the side is reflected on the inner surface of the light box (5) and is incident on the deflecting structural plate (3). The deflecting structural plate (3) is adjacent to the adjacent structural plate (3). The range between the two light sources (2) and (2) is such that light directly incident from the adjacent two light sources (2) (2) is displayed (for example, by solid line in FIG. The light of the light path is designed to be emitted toward the front side direction (a) of the normal direction of the deflecting structural plate (3), as shown in Fig. 16, so that the light is reflected in the disordered direction. It is difficult for the reflected light incident on the deflecting structural plate (3) (shown by a dotted line) to be emitted toward the front side direction (a) of the normal direction of the deflecting structural plate (3). In the case where the reflecting surface portion (7) is provided, it is difficult for the reflected light to be emitted in a disordered direction immediately after passing through the deflecting structural plate (3), and it is difficult to emit the reflected light in the front direction. Thus, the reflecting surface is not provided ( 7) The composition can be controlled directly from the light source (2) The direction of the light entering the deflecting structure plate (3) is not reflected by the light source (2), and is reflected in the direction of the reflected light of the deflecting structure plate (3) in an unordered direction. In the present invention, the reflecting surface portion (7) is such that light emitted from the light source (2) toward the back side faces the light source (2) or toward the light source (2). The shape, structure, and the like of the function of reflecting at a nearby position are not particularly limited. For example, a configuration including the reflecting surface portion (7) shown in Figs. 6 to 9 (second embodiment) may be employed. In the second embodiment, light is emitted from the light source (2) toward the back side on the back side of each of the light sources -20-201002982 (2), and is directed toward the light source (2) or toward the light source ( 2) The point of the reflection surface portion (7) reflected in the vicinity is the same as that of the first embodiment. However, in the second embodiment, the reflection surface portion (7) has a connection curvature center (Y1). a first curved surface (7a) at a position near the light source (22) and a second curved surface (7b) having a center of curvature (Y2) in the vicinity of the second light source (22) Configuration (refer to Figure 9). However, the reflective surface portion (7) may be a first curved surface (7a) having a range (Z) of the second light source (22) having a connection curvature center (Y1), and a curvature center (Y2) exists. The reflection surface of the second curved surface (7b) of the range (Z) of the second light source (22) is formed. Further, in the second embodiment, the reflecting surface portion (7) extends from the back side of the second light source (22) to the front side of the second light source (22) on the left side and the front side of the front side. It is formed by a slight side (see Fig. 8). Further, a configuration including the reflecting surface portion (7) shown in Figs. 10 to 13 (third embodiment) may be employed. In the third embodiment, the light source 'from the light source (2) toward the back side is disposed on the back side of each light source (2) toward the light source (2) or toward the vicinity of the light source (2). The point of the reflected reflecting surface portion (7) is the same as that of the second embodiment. However, in the third embodiment, the reflecting surface portion (7) is present in the vicinity of the light source (2) by using the center of curvature (Y). The configuration of the curved reflecting surface of the position (see Fig. 13). However, the reflecting surface portion (7-21-201002982) may be formed by a curved surface (γ) which is present in one of the curved reflecting surfaces of the light source range (z). Incidentally, the same components as those in the first embodiment of Figs. 1 to 5 are denoted by the same reference numerals, and the description thereof will be omitted. Alternatively, a configuration having a reflecting surface portion (7) as shown in Fig. 14 may be employed (fourth embodiment). In the fourth embodiment, the light source 'from the light source (2) toward the back side is provided on the back side of each light source (2) toward the light source (2) or toward the vicinity of the light source (2). The point of the reflected reflecting surface portion (7) is the same as that of the first to third embodiments. However, in the fourth embodiment, the reflecting surface portion (7) is attached to the back side of the light source (2), and is connected. a plurality of planar reflecting surfaces (7c) arranged around the light source (2), and a cross-sectional view perpendicular to the longitudinal direction of the light source (2), including a planar reflecting surface adjacent to the connection (7c) The vertex (9) of (7c) and the unconnected vertex (9A) of the leftmost planar reflecting surface (7c), and the unconnected vertex (9B) of the rightmost planar reflecting surface (7c) The center (Y3) of the smallest imaginary circle (U) is formed in the vicinity of the light source range (z) or the light source (2). Further, in the fourth embodiment, all the smallest imaginary circles (U) including the pre-g vertices (9) (9) (9) (9) (9) (9A) (9B) are passed through All vertices (9) (9)(9) (9) (9) (9A) (9B). That is, the inner surface shape of the reflecting surface portion (7) is the same as the shape in which the regular dodecahedron is one of two equal parts. In the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted. -22- 201002982 Alternatively, a reflecting surface portion (7) as shown in Fig. 15 may be employed (the fifth embodiment). In the fourth embodiment, light is emitted from the light source (2) toward the back side of the light source 2), and is reflected toward the light source (2) or toward the vicinity of the light source (2). The point of the reflecting surface portion (7) and the reflecting surface portion (7) are connected to a plurality of planar reflecting surfaces (7c) disposed around the light source (2) on the back side of the light source (2). A cross-sectional view of a surface perpendicular to the longitudinal direction of the light source (2), including a vertex (9) ... connecting the abutting plane reflecting surface (7c) (7c) and a leftmost plane surface (7c) The non-joining apex (9A), and the center of the smallest imaginary (U) of the unconnected vertices (9B) of the rightmost planar surface (7c) (Y4) are present in the source range (Z) or The point of the position near the light (2) is the same as that of the fourth embodiment. In the fifth embodiment, all the minimum imaginary vertices (9) (9) (9) ( ) (9B ) are included. The circle (U) is a point that passes through some of the vertices (9), (9), (9), (9A), and (9B) of the above, and the fourth The form is different. That is, the vertices of the lowest imaginary circle (U) including the vertices of the preceding vertices are not passed through the center of the lowest position (the position farthest from the deflected plate), but pass the remaining 4 points (9) (9) ( 9A) (9B) of the circle. Incidentally, in FIG. 15, the same components as those in the first embodiment are denoted by the same reference numerals and will not be described. The reflecting surface portion (7) has the first to third embodiment described above, and has 1 or a plurality of centers of curvature existing in the light source range (Z) or the light (the addition is a counter-reverse source of the fork but 9 A has a rounded top and its source -23- 201002982 (2) The curved surface of the nearby position is formed, but it is better to increase the brightness of the front direction. In addition, as the reflective surface (7), According to the fourth and fifth embodiments described above, a plurality of planar reflecting surfaces (7c) disposed around the light source (2) on the back side of the light source (2) are perpendicularly intersected with the light source (2) The cross section of the longitudinal direction surface has a center (Y3) of the smallest imaginary circle (U) including the apex (9) (9 A ) (9B) of both ends of the plane reflection surface (7c) (Y4) It is formed by a plurality of planar reflecting surfaces (7c) in the range of the light source (Z) or the position near the light source (2), but it is preferable to increase the brightness in the front direction. It is necessary to emit light from the light source (2) toward the back side, The light source (2) or the position near the light source (2) is reflected. However, the range (domain) (W) of the position near the light source (2) is the deflection structure plate (3) and The distance between the light sources (2) is "Η", and when the distance between the centers of the adjacent light sources (2) (2) is "L", they are parallel in the normal direction of the deflection structural plate (3). The vertical distance to the first imaginary straight line (Q) passing through the center position (G) of the light source (2) is 0.1 5 L or less, and for the aforementioned deflection structural plate (3), parallel to the light source ( 2) The vertical distance from the second imaginary straight line (J) of the center position (G) is 0.1 5 Η or less, and the distance from the center position (G) of the light source (2) is the same as the light source (2) The range of the light source below the radius (ie, the range in which the light source is present) (Ζ) is better (refer to Figures 5, 9, and 13). The reflected light reflected on the reflective surface (7) is -24- 201002982 It is more positive to adopt the position of the position near the light source in such a specific range. The thickness (s) of the deflecting structure plate (3) is not particularly limited, but is usually set to O.hO.lSmm, preferably 〇5 to 10 nm, more preferably 1 A transparent plate made of a transparent material such as a transparent resin, such as a transparent glass, is used as the above-mentioned deflecting structural plate (3). The transparent resin layer is not particularly limited, but examples thereof include polycarbonate. Ester resin, ABS resin (acrylonitrile butadiene styrene copolymer resin), isobutylene resin, MS resin (methacrylic acid styrene copolymer resin), polystyrene resin, AS resin (acrylonitrile-styrene copolymer resin) ), polyolefin resin (for example, polyethylene, polypropylene, etc.). It is also possible to disperse and contain a light diffusing agent (light diffusing particle) in the above-mentioned deflecting structure plate (3)'. The enthalpy (triangle) forming method of the deflecting structural plate (3) is not particularly limited, and examples thereof include an extrusion method, a press method, a cutting method, and an injection molding method. Among them, from the viewpoint of production efficiency, it is preferable to produce by the extrusion method. The light source (2) is not particularly limited, and examples thereof include a fluorescent tube (cold cathode tube), a halogen lamp, a straight tubular lamp such as a tungsten lamp, and a point light source such as a light-emitting diode (LED). . Further, the distance (L) between the centers (G) and (G) of the adjacent light sources (2) and (2) is preferably set to 50 minutes from the viewpoint of power saving. Further, it is preferable that the distance (?) between the deflecting structural plate (3) and the light source (2) is set to 5 to 5 Omm from the viewpoint of thinning. -25- 201002982 In the surface light source device (i) of the present invention, the transmissive image display device (10) is also included in the back side of at least one of the light sources (2) constituting the plurality of light sources of three or more of the above. The light emitted from the light source (2) toward the back side is provided with a reflecting surface portion (7) that is reflected toward the light source (2) or toward a position near the light source (2). Needless to say, it is needless to say that each of the back side (the back side of all the light sources) of the plurality of light sources constituting the surface light source device (1) or the transmissive image display device (10) is provided with the light source ( 2) It is preferable that the light radiated toward the back side faces the light source (2) or the reflecting surface portion (7) that is reflected toward the vicinity of the light source (2). Further, as the reflecting surface portion (7)', for example, a plurality of straight tubular lamps arranged in parallel with each other may be used as the light source (2), and a plurality of straight tubular light sources (2) may be connected. The central portion in the longitudinal direction is formed in a strip shape in a state of being perpendicularly intersecting the light source (2) (a configuration in which a reflecting surface is disposed only on the back side of the central portion in the longitudinal direction of each light source). Further, for example, in the left-right direction of FIGS. 2, 7, and 11, the surface light source device (1) or the transmissive image display device (10) may be designed in the horizontal direction (horizontal direction), or in FIG. 2' The left and right directions of '11' are designed to be in the vertical direction (up and down direction) of the surface light source device (1) or the transmissive image display device (10), and are not particularly limited. For example, the transmissive image display device (10) is required to have a narrow viewing angle for the vertical direction (up and down direction) in the left-right direction (horizontal direction) as the other side of the wide viewing angle, but for such a situation -26- 201002982, for example, in the left-right direction of FIG. 2'7'11, it may be designed to be in the vertical direction (up-and-down direction) of the surface light source device (1) or the transmissive image display device (10). In the surface light source device (1) of the present invention, the transmissive image display device (1) is not particularly limited to the configuration of the above-described embodiment, and is within the scope of the patent application, and can be allowed to do without departing from the spirit of the invention. Any design changes. EXAMPLES Next, specific examples of the invention will be described, but the invention is not particularly limited to the constitution of the embodiments. <Example 1> The light is emitted toward the observer from the deflecting structural plate (3) in the case of constituting the liquid crystal display device (1) having the configuration of the first embodiment (see Figs. 1 to 5) The angular distribution of the luminance is such that the front side direction (a) of the normal direction of the structural plate (3) is centered, and the light is sufficiently concentrated within a range of ±12°, and the brightness in the front direction is sufficiently enhanced. Further, the front side direction (a) of the normal direction of the structural plate (3) is centered, and about 6 3% of the total emitted light is emitted for a direction within a range of about 1 〇 °. However, in general, in a liquid crystal television or the like, the viewer is considered to be better at a distance of three times the height of the screen from the liquid crystal television, and in this case, the viewer is watching the uppermost position of the screen of the liquid crystal television. Angle -27- 201002982 From the level of about ίο. And when looking at the lowest position of the same picture, the angle is about 10° from the horizontal. The various design conditions of the liquid crystal display device of the first embodiment are the same as those described above (see Table 1). However, the interval (L) between the adjacent light sources (2) and (2) is set to 30 mm, and the distance (T) from the apex of the shielding portion (8) to the deflection of the structural plate (3) is set to 10 mm 'from The distance (H) from the light source (2) to the deflection plate (3) is set to 19 mm, the diameter (2r) of the light source (2) is set to 2 mm, and the front surface is the curved surface of the reflection surface (7) of the white reflection surface. The radius of curvature (R) of the reflecting surface was set to 3 mm. Further, the deflecting structural plate (3) was composed of a resin plate having a thickness (S) of 2 mm made of an MS resin (transparent resin) having a refractive index of 1.57. However, the center of curvature (Y) of the curved reflecting surface of the reflecting surface portion (7) exists at a position shifted by 1 mm from the center position (G) of the light source (2) in the front direction along the first imaginary line (Q). [Industrial Applicability] The surface light source device of the present invention is suitably used as a backlight for a transmissive image display device, but is not particularly limited to such a use. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic side view showing an embodiment of a transmissive image display device of the present invention. Fig. 2 is a schematic side view showing an embodiment (first embodiment) of the surface light source device of the present invention. In Fig. 2, in order to explain the function of the -28-201002982 part, the necessary optical path is attached, and the light path of the light emitted by the solid arrow with the arrow is simultaneously formed, and the light path of the light is indicated by the arrow line. . Fig. 3 is a side view showing the first mode of the same surface light source device as Fig. 2. In this FIG. 3, in order to explain the reflecting surface], the necessary optical path 'is shown by the solid line with the arrow, and is directly incident on the deflecting structural plate from the light source, and is emitted from the biased structural plate while the arrow is not directed from the light source. Back side light path. Fig. 4 is a side elevational view showing the deflection of the surface light source device of Fig. 2; Fig. 5 is a plan view showing the light source of the surface light source device of Fig. 2 enlarged. Fig. 6 is a side view showing the mode of the transmissive image of the present invention: an embodiment. Fig. 7 is a schematic side view showing the surface light source device of the present invention; (second embodiment). In Fig. 7, the function of the shielding portion is attached with the necessary optical path, and the light path of the light emitted from the panel is attached with the arrow, and the light path of the light is attached with the unevenness of the arrow line. Fig. 8 is a side view showing the first mode of the same surface light source device as Fig. 7. In FIG. 8 , in order to explain that the light path necessary for the reflection surface is indicated by a solid line with an arrow, the light is directly incident on the deflecting structural plate from the light source, and the display is deflected from the biased structure to the brightness. The function of the part of the state is attached to one of the structural plates of the light emitted by the light path of the front side and other embodiments of the side bearing device in the vicinity thereof, in order to explain that the hidden line display becomes brightness from the bias display 2 The function of the part of the embodiment is attached to the light path of the light from the front side -29-201002982. At the same time, the light path of the light radiated from the light source toward the back side is displayed with an arrow dotted line. Fig. 9 is a side elevational view showing the light source of the surface light source device of Fig. 7 and its vicinity. Fig. 10 is a schematic side view showing still another embodiment of the transmissive image display apparatus of the present invention. Fig. 11 is a schematic side view showing another embodiment (third embodiment) of the surface light source device of the present invention. In FIG. 11, in order to explain the function of the shielding portion, the necessary optical path is attached, and the light path of the light emitted from the deflecting structural plate is displayed with a solid line arrow, and the light which is a cause of luminance unevenness is displayed with an arrow dotted line. The light path. Fig. 12 is a schematic side view showing a third embodiment of the surface light source device similar to Fig. 7. In FIG. 12, in order to explain the function of the reflecting face, the optical path necessary for attaching the light path of the light emitted from the light source to the front side and directly incident on the deflecting structure plate from the deflecting structural plate is displayed with a solid line of the arrow. 'The light path of the light radiated from the light source toward the back side is indicated by the dotted line. Fig. 13 is a side elevational view showing the light source of the surface light source device of Fig. 11 and its vicinity. Fig. 14 is a side elevational view showing the vicinity of the reflecting surface of the other embodiment (fourth embodiment) of the surface light source device of the present invention. Fig. 15 is enlarged and shown in the surface light source device according to the present invention. Side view of the vicinity of the reflective surface of the other embodiment (fifth embodiment) -30-201002982 Fig. 16 is a schematic side view showing the configuration of the surface light source device of Comparative Example 1. In Fig. 16, the optical path of the light emitted from the light source to the front side and directly incident on the deflecting structural plate and emitted from the deflecting structural plate is shown by a solid line with an arrow. Further, the light path of the light radiated from the light source toward the back side is displayed by an arrow dotted line. [Description of main component symbols] 1 : Surface light source device 2 : Light source 3 : Deflection structure plate 7 : Reflected surface portion 7 a : First curved surface 7 b · · Second curved surface 7 c : Planar reflective layer 8 : Shading portion 9 , 9 A 9B: vertex 10: liquid crystal display device (transmissive image display device) 14: transmissive image display unit 1 9 : body forming plate 2 1 : first light source 22 : second light source 2 3 : third light source 24 : 4 light source - 31 - 201002982 2 5 : 5th light source 91 to 94 : Corresponding range a : Normal direction front direction G : Center position of light source Q : 1st imaginary line J : 2nd imaginary line U : Imaginary circle Y, Y1, Y 2 : center of curvature Y 3, Y 4 : center of imaginary circle W: range of position near the light source (field) Z: source range -32-