201124778 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種使用端面照光（edgelight)方式 的面光源裝置的影像顯示裴置。 【先前技術】 液晶顯示裝置基本上是由背光裝置（backlight)與液 晶顯示元件構成。根據液晶顯示裝置的緊湊化的觀點，大 多使用端面照光方式的面光源裝置來作為背光裝置。於端 面照光方式的面光源裝置中，將矩形板狀的導光體的至少 -個端面用作光人射端面，沿著該光人射端面來配置直管 型螢光燈等的線狀或棒狀的—次光源，將自該_次光源發 出的光自導光體的光人射端面導人至導光體内部，接著使 該光自該導統的_主财的其中—個主面即光出射面 近年來，於筆記型個人電腦（notebook pers〇nai 議_〇或個人電腦（Pe麵al Computer, PC)用的監 =、(Γ::Γ)、電視(Television ’Tv)、立體影像顯示 、、s又晝面顯不裴置等的多晝面顯示裝置中，多媒體 (m碰media)視聽用途的機會增力口，對於這些裝置的需 求f 張111此’要求液晶顯示裝置實現高解析度化以及 :。闵Γ，：七且、對於監視器的輕量化、薄型化的需求高 ' '面光源裝置提高亮度性能，且實現薄型化。 等情:用====為筆記型個人電腦 疋你裝置，該面光源裝置是使用如下配置 201124778 方式：於與導光體侧相反側的面上形成有稜鏡列的棱鏡片 (prism sheet)，以各個稜鏡片的稜鏡列大致正交的方式， 將2枚稜鏡片配置於平板狀的導光體上。然而，於此種面 光源裝置中，由於所用的光學薄片的數量多，或由於薄片 之間的光的損失等，難以應對如上所述的要求。 為了削減構件數量，進而使亮度性能提高 ，例如於日 本專利特開2000-106022號公報（專利文獻丨）中揭示有 如下的技術：於導光體的經粗糙面化的光出射面的相反侧 的面即光反射面上，沿著橫跨光人射端面的方向而形成具 有聚光效率高的剖面形狀的縱棱制，以稜制與導光體 的光出射面相向的方式’將排列有多個稜鏡列的棱鏡片配 置於導光體的光㈣面上，職光學薄)i的數量，同時抑 制面光源裝置的消耗電力，並且使出射光的分布變窄，藉 此來使亮度性能提高。 另方面’於此種面光源裝置中，鄰接於光反射面而 、置的反射薄片易貼附於光反射面。當以此種狀態來放置 於溫度高轉境巾時，砂聽W與導統的材質的差 異所引起的熱輕（觸）之差，反㈣片有時會發生變 =翹由此’㈣職置存在產生各種條紋或亮度不 二键問題。因此’為了於面光源裝置中防止如上所述的反 许’、，片貼附於光反射面的情況，且為了獲得均勻的發光亮 ^ ’巾例如於日本專利特開2005-203182號公報（專利文獻 揭不有如下的技術，該技術的特徵在於包括：光出射 吏在導光體内傳播的光射出；圖案（pattera)區域， 201124778 為了將自光出射面射出的光朝向從光 光入射·^向所規定的方向射出；多個稜鏡，沿著自 I— π與光入射端面相向的相反側端面且與縱轴 私二的f向，形成於與光出射面相向的光反射面；以及反 射缚片密接防止部’包含設置於稜鏡冊線上的多個微細 的凸部或凹部’以不對導光板的出射特性產生影響的方式 而，成上述凸部或凹部’或上述技㈣特徵在於：上述凸 狀部中的上述反射薄片密接防止部的凸部或凹部的直徑為 μιη至30 μιη，鬲度為_5 μιη至+5 μηι，或上述技術的特禮支 在於:以5個每平方毫米至50個每平方毫米的範圍= 上述反射薄片密接防止部的凸部或凹部。 “另一方面，面光源裝置存在如下的問題，即，自一次 光源射出且導入至導光體内的光中，自光出射面射出至大 氣中的光量的比例（照射效率）變少。這是因為被導光體 的光出射面所反射的光量多。因此，為了使經由稜鏡片以 及擴散薄片而射出的光的聚光效率提高，於例如日本專利 特開2006-49018號公報（專利文獻3)中揭示有一種實現 能夠以簡單的方法來製造的導光板的技術：對於採用如下 的方式的導光體，將凸部的朝向光源側的主反射面設為平 面’且以將該平面的法線投影至與光反射面平行的平面上 時’法線的投影線與光源的光轴呈規定角度的方式來形成 凸部，使自導光板的側面入射且自光出射面射出的光經由 配置於上方的稜鏡片及擴散板而效率良好地朝規定方向集 中’上述方式的導光體將來自光源的光自導光體的光入射 6 201124778 端面導入至導光體内，由形成於導光體的光反射面上的凸 部來對上述光進行全反射，從而使上述光朝向導光體的光 出射面方向。 另一方面，於在觀察時需要佩戴眼鏡的先前的立體影 像顯不中，存在如下的問題，即，觀察者必須佩戴眼鏡， 對於觀察者而言’眼鏡的佩戴成為引起不快感或心煩的原 因。又，對於藉由對光的指向性來進行切換而使得在觀察 時無需佩戴眼鏡的先前的立體影像顯示而言，存在如下的 問題：需要昂貴的切換快門（shutter)元件，從而成本高。 又，對於藉由導光板來直接對指向性進行控制的立體影像 顯不而言，難以對指向性進行控制，且易產生左右的串擾 (crosstalk)，或例如使用2組背光裝置而導致構成複雜， 從而成本升高。因此，為了獲得適合於攜帶資訊終端的可 於同一晝面中同時顯示不同影像的顯示裝置，例如於日本 專利特開2007-179059號公報（專利文獻4)中揭示有如 下的技術，該技術包括··導光體；光源，分別配置於上述 導光體的不同的兩個光入射端面；雙面棱鏡片，配置於導 光板的光出射面側，於與導光體相向的面上具有朝向與導 光體的光入射面平行的方向延伸的三角形狀棱鏡列，且於 與上述面相向的面上具有與上述三角形狀稜鏡列平行地延 伸的圓筒狀透鏡列；透射型顯示面板，配置於上述雙面稜 鏡片的出射面侧；以及同步驅動單元，與光源同步地使視 差像顯不於透射型顯示面板，來自光源的光分別沿著上下 不同的方向而自透射型顯示面板射出，從而可顯示上下不 201124778 同的影像。 又，於在觀察時無需佩戴眼鏡的先前的立體影像顯示 中，存在如下的問題，即，由於必須將左右的視差像顯示 於顯示面板（panel)的每條垂直畫素線中，因此，影像的 各列畫素被右用與左用中的任一個用途所分擔，從而導致 立體影像顯示裝置的影像的晝素數減半。因此，為了提供 種可不使用眼鏡且顯示晝素數與顯示面板的畫素數相同 的立體影像的立體顯示裝置，例如於日本專利第3585781 號公報（專利文獻5)巾，揭示有如下的技術，該技術的 特徵在於包括：導紐，具有第〗邊的厚度形成為比與上 述第1邊相向的第2邊的厚度更厚的第i楔型導光體及第 2換型導光體’且上述帛丨楔型導光體的上述第丨邊與上 述第2導光體的上述第2邊重合；設置於上述第丨横型導 光體的第1邊的第1光源；設置於上述第2楔型導光體的 第1邊的第2光源；稜鏡薄膜（fllm)，設置於上述導光體 上’且將自上述導光體射出的上述第i光源及上述第2光 源的光分^轉換為與第丨視差、第2視差相對應的角度； 上述稜鏡薄膜上的透射型顯示面板；以及同步驅動單元， ^上述第1光源及上述第2杨同步地使第i視差影像、 第2視差影像顯示於上述顯示面板，與將上述第1視差影 像顯不於上賴示φ板的顯示動糊步地使上述第i光源 與將上述第2視差f彡像辭於上述齡面板的顯示 4同步地使上㈣2柄點燈，藉此來分時地將第工視 差影像、第2視絲像顯示於上述顯示面板。 8 201124778 [先行技術文獻] [專利文獻] [專利文獻1]日本專顺開2__1()6()22號 [專利文獻2]日本專利特開2〇〇5_2〇3182號公 [專利文獻3]日本專利特開2〇〇6_49〇18號公報 [專利文獻4]日本專利特開2〇〇7_179〇59號公 [專利文獻5]日本專利第3585781號公報 【發明内容】 於先前的以使稜鏡列大致正交的方式來配置2枚棱鏡 片的面光源裝置中，使自導光體擴散射出的光發生折射， 藉此來對來自©光源裝置的光的出射方向進行調整。以上 述方式使舰級生折射，藉此來向性進行控制此 外，由於光學薄片的使用數量多，因此，於先前的面光源 裝置中不驗察到劃痕等的缺陷。另—方面，於如專利文 獻1所揭示的面祕裝置中’使指向性非常高的光自導光 體射出，由稜鏡片的稜鏡列來對來自導光體的出射光進行 全反射，藉此來對來自面光源裝置的光的出射方向進行控 制，從而實現高亮度性能。對於此種面光源裝置而言，雖 可使亮度性能提高，但存在如下的缺點：必須非常精密地 對形狀進行控制，當由於對面光源裝置進行按壓或使該面 光源裝置振動，而使導光體與其他構件發生摩擦時，導光 體上產生的劃痕、或導光體的縱稜鏡列的前端部的碎裂易 被看成白點（局部地產生明亮的部分的問題）或黏附 (sticking )(由於構件彼此光學密接而使光學性能部分地 201124778 發生變化的問題）。如上所述的缺 尤其會顯著地產纽導絲與向’即’ 反射元件之間。又，由於近年的光 顯示裝置⑽，導光體多會❹i反射板或行動設匕備 的框，的擠；1，從而易產生白點或黏附。 右為了使如上職的缺闕視認性降躺 =’ _可使白點變得不明顯，但存在導致亮度性^ 低的問題。又’亦已研究對鄰接於導光體聽置的光反射 兀件的表面實施不易損#導光體的特別加工，但由於實施 此種加工而引起的光反射元件的成本上升成為問題。 另一方面，於如專利文獻2所揭示的面光源裝置中， 雖可防止薄片材料貼附於光反射面，且可獲得均勻的發光 亮度，但存在如下的缺點：若使凸部或凹部的密度降低， 則防止密接的效果會減弱，若增加密度，則會對出射特性 產生影響’並且可經由導光板而觀察到凸部或凹部的圖案。 另一方面，於如專利文獻3所揭示的面光源裝置中， 雖可使經由稜鏡片及擴散薄片而射出的光的聚光效率提 高’但存在如下的缺點：雖然例示了該面光源裝置的特徵 在於’凸部的朝向光源側的面與光反射面所成的角度處於 10°〜45°的範圍内，此時的法線的投影線與上述光源的光 軸所成的角度處於30。〜75。的範圍内，但是對於該角度而 言’無法利用如下的稜鏡片來使自導光板的光出射面射出 的光效率良好地聚光，該稜鏡片沿著與光入射端面平行的 方向延伸，且於與該導光板的光出射面相向的一側具有三 201124778 角形狀棱鏡列。 另一方面’於如專利文獻4所揭示的面光源裝置中， 雖未δ己載具體的導光板的形狀，但根據說明書内的圖，出 射光的峰值角度為70度且分布於度至80度附近’於導 光板的光出射面或光反射面設置有光出射機構。一般而 言，該光出射機構經過糙面（mat)加工。又，為了無關於 與光源之間的距離而使亮度變得均勻，必須隨著遠離光源 而使糙面的粗糙度增大。藉此，峰值角度會發生變化，或 分布會變廣，因此’存在如下的缺點，即，無論使用多少 棱鏡片Φ無法對光的出射方向或光的分布進行控制。 本發明所欲解決的問題在於，提供一種高亮度且高品 質的影像顯示裝置，該影像顯示裝置可抑制使用端面照光 方^的面光源裝置的影像顯示裝置中的亮度性能的降低， 同時可防止白點等的光學缺陷的產生。 及所欲解決的問題在於’使用可廉價地提 八二儿又及Ν'"質的影像顯示裝置的導光體，藉此來接徂 學缺陷的產生或與 關於 與光反射元件的接觸面積減少，可防止導=由使導光體 前端的碎㈣痕料起的 透鏡列的 成本發明。 I戈黏附的產生，從而完 201124778 根據本發θ #為解決上述問題巾的至少—個問題的發 明’提供-種影像顯林置，包括：導絲；稜鏡片，鄰 接於上述導光體的光出射面而配置，且於與上述導光體的 光出射ί相向的人絲形成有多個稜鏡列，該多個稜鏡列 大致沿者與上述光人射端面平行的方向延伸且彼此大致平 行地排列；鄰接於上料紐的光人射端面而配置的一次 光源；以及顯示面板。該影像顯示裝置的特徵在於：上述 導光體對自上述-次光源發出的紐行導光，且包括自上 述-次光源發出的光所射人的光人射端面、使經引導的光 的β刀射出的光出射面、以及該光出射面的相反側的光 反射面，上述光反射面以及上述光出射面中的至少一個面 包括多個透鏡列，該多個透鏡列大致沿著垂直於上述光入 射端面的方向延伸且彼此大致平行地排列；於上述光反射 面附設有散布的多個凸狀構造；上述多個凸狀構造的各個 凸狀構造的自上述光反射面突出的高度為2 μιη以上；於 上述光反射面的有效顯示區_，在絲意的上述凸狀構 造為中心且具有該凸狀構造的高度的1〇〇倍的半徑的圓的 範圍内，存在兩個以上的其他的上述凸狀構造。 藉由設置如上所述的凸狀構造，使導光體的光反射面 與光反射元件等的構件的接觸面積減少，從而可防止黏附 的產生、以及由該黏附引起的白點等的光學缺陷的產生。 一於本發明的一個形態中，上述多個透鏡列設置於上述 光反射面，上述凸狀構造附設於上述透鏡列的頂部。於該 情形時，尤其可防止導光體的透鏡列的前端碎裂的產生， 12 201124778 2而可防朗透_的整個前端受損而產生條狀的光學缺 光出^發個=中’上述多個透鏡列形成於上述 ^射面’上述光反射面包含鏡面或平均傾斜角 以 凸面。於該情形時’尤其由於導光體的透鏡 使導光體出射光擴散的功能，因此 = 面的光學缺陷難以被看到。 J使導先體的先反射 於本發明的一個形態中，上述多個透鏡列形 光出射面的兩個面上，上述凸狀構造： j形成在上述歧射面上的上述透鏡列_部。於寸 π ’尤其可使導光體的光反射面與光 = 的接觸面積減少，可防止黏附的產生等的構件 陷的產生，並且可防止導光。= 而產生條狀的光學缺陷透鏡列的整個前端受損 於^明的-個形態中’上述導光體包括一個光入射 著上包含上述光出射面的法線方向且沿 者上迷透鏡列的延伸方向的剖面的形狀中， 域，其高度隨著遠離上述光人射端面而增加；以及^ 其高度隨著遠離上述光入射端面而減 述 r區域的平均傾斜角為7度以下。於該情形時變尤3 於凸狀構造，使得導光體的光的出射特 二 f化’因此’可防止光學缺陷的產生，並; 且明亮的影像顯示裝置。 捉t、均g 13 201124778 於本發明的一個形態中，上述凸狀構造於包含上述光 出射面的法線方向且沿著上述透鏡列的延伸方向的剖面的 形狀中，上述第1區域的傾斜角為42 2度以上。於該情形 時，尤其在導光體内部傳輸的光不會到達導光體與光反射 π件等的構件的接觸點，即便與光反射元件等的構件的接 觸點受損，亦不會看到自點’因此，可更有效果地防止 學缺陷的產生。 於本發明的一個形態中，上述凸狀構造具有下述（入） 〜（D)的變化中的至少一種變化：201124778 VI. Description of the Invention: [Technical Field] The present invention relates to an image display device using a surface light source device of an edge light type. [Prior Art] A liquid crystal display device basically consists of a backlight and a liquid crystal display element. From the viewpoint of downsizing of the liquid crystal display device, a surface light source device of an end face illumination type is often used as a backlight device. In the surface light source device of the end face illumination method, at least one end surface of the rectangular plate-shaped light guide body is used as a light human end surface, and a linear shape such as a straight tube type fluorescent lamp is arranged along the light human end surface. a rod-like secondary light source that directs light emitted from the _ secondary light source from the light-emitting end face of the light guiding body to the inside of the light guiding body, and then causes the light to be from the main body of the guiding body In recent years, in the notebook personal computer (notebook pers〇nai _ 〇 or personal computer (Pe surface al Computer, PC) used for supervision =, (Γ:: Γ), television (Television 'Tv) In the multi-faceted display device, such as stereoscopic image display, s, and 昼 显 , , , , , 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体 多媒体The device achieves high resolution and: 闵Γ,: The demand for lightweight and thinner monitors is high. 'The surface light source device improves brightness performance and achieves thinning. Equivalent: Use ==== For the notebook PC for your device, the surface light source device is configured as follows 201124778 a prism sheet formed on the surface opposite to the light guide side, and two cymbals arranged in a flat shape so that the cymbals of the cymbals are substantially orthogonal to each other However, in such a surface light source device, it is difficult to cope with the above-described requirements due to the large number of optical sheets used or the loss of light between the sheets, etc. For example, Japanese Patent Publication No. 2000-106022 (Patent Document No.) discloses a technique in which a surface on the opposite side of a rough surface of a light-emitting surface of a light guide is a light-reflecting surface. Forming a longitudinal rib having a cross-sectional shape with a high light collecting efficiency along a direction across the end face of the light human, and arranging a plurality of arrays in a manner of aligning with the light exit surface of the light guide The prism sheet is disposed on the light (four) surface of the light guide body, and the number of job optical thins i is suppressed, and the power consumption of the surface light source device is suppressed, and the distribution of the emitted light is narrowed, thereby improving the luminance performance. On the other hand, in such a surface light source device, a reflective sheet placed adjacent to the light reflecting surface is easily attached to the light reflecting surface. When placed in a high-conversion environment in this state, the difference between the heat and the light (touch) caused by the difference between the material of the sand and the guide, the reverse (four) piece sometimes changes. The presence of a job creates various stripes or brightness problems. Therefore, in order to prevent the above-mentioned reversal in the surface light source device, the sheet is attached to the light reflecting surface, and in order to obtain uniform light emission, for example, Japanese Patent Laid-Open Publication No. 2005-203182 ( The patent document discloses a technique which is characterized in that: the light exiting the light emitted by the light in the light guide body; the pattern (pattera) region, 201124778 in order to direct the light emitted from the light exit surface toward the light from the light ^ is emitted in a predetermined direction; a plurality of turns are formed on the light reflecting surface facing the light emitting surface along the f-direction opposite to the end surface opposite to the light incident end surface from I-π and the vertical axis And the reflection tab adhesion preventing portion 'including a plurality of fine convex portions or concave portions provided on the stencil line to form the convex portion or the concave portion' or the above technique (4) so as not to affect the emission characteristics of the light guide plate The convex portion or the concave portion of the reflective sheet adhesion preventing portion in the convex portion has a diameter of from μηη to 30 μηη, and has a twist of _5 μιη to +5 μηι, or the above-mentioned technique is: 5 ranges from 50 mm to 50 mm/mm = the convex portion or the concave portion of the reflective sheet adhesion preventing portion. "On the other hand, the surface light source device has a problem that it is emitted from the primary light source and is guided to the light guide. In the light in the body, the ratio (irradiation efficiency) of the amount of light emitted from the light exit surface to the atmosphere is reduced. This is because the amount of light reflected by the light exit surface of the light guide is large. The concentrating efficiency of the light which is emitted by the diffusion sheet is improved. For example, a technique for realizing a light guide plate which can be manufactured in a simple manner is disclosed in Japanese Patent Laid-Open Publication No. Hei. No. 2006-49018 (Patent Document 3): In the light guide of the embodiment, the main reflection surface of the convex portion facing the light source side is a plane ', and when the normal line of the plane is projected onto a plane parallel to the light reflection surface, the projection line of the normal line and the light of the light source The convex portion is formed so that the shaft is formed at a predetermined angle, and the light incident from the side surface of the light guide plate and emitted from the light exit surface is efficiently regulated by the gusset and the diffusion plate disposed above. The light guide body of the above-described manner integrates the light from the light source into the light guide body from the light incident surface of the light guide 6 201124778, and the light is formed by the convex portion formed on the light reflection surface of the light guide body. The total reflection is such that the light is directed toward the light exit surface of the light guide. On the other hand, the previous stereoscopic image that needs to be worn when viewing is not visible, and there is a problem that the observer must wear glasses. For the observer, the wearing of the glasses is a cause of discomfort or annoyance. In addition, for the previous stereoscopic image display in which the directionality of the light is switched so that the glasses are not required to be observed at the time of observation, there are the following The problem is that expensive shutter shutter components are required, which is costly. Moreover, it is difficult to control the directivity of the directivity of the directivity by the light guide plate, and it is easy to generate the left and right. The crosstalk, or the use of two sets of backlights, for example, results in a complicated configuration and thus an increase in cost. Therefore, in order to obtain a display device suitable for carrying an information terminal, which can simultaneously display different images in the same side, a technique disclosed in Japanese Patent Laid-Open Publication No. 2007-179059 (Patent Document 4), which includes the following techniques, includes · Light guide; light source is disposed on two different light incident end faces of the light guide; the double-sided prism sheet is disposed on the light exit surface side of the light guide plate, and has a direction on a surface facing the light guide body a triangular prism row extending in a direction parallel to the light incident surface of the light guide, and having a cylindrical lens row extending in parallel with the triangular array on the surface facing the surface; and a transmissive display panel Arranging on the exit surface side of the double-sided cymbal sheet; and the synchronous driving unit, the parallax image is not visible to the transmissive display panel in synchronization with the light source, and the light from the light source is emitted from the transmissive display panel in different directions , so that the same image can be displayed up and down without 201124778. Moreover, in the previous stereoscopic image display which does not require wearing glasses at the time of observation, there is a problem in that it is necessary to display the left and right parallax images in each vertical pixel line of the display panel, and thus the image Each of the pixels of the column is shared by any of the right and left uses, thereby causing the number of pixels of the image of the stereoscopic image display device to be halved. Therefore, in order to provide a stereoscopic display device which can display a stereoscopic image having the same number of pixels as the number of pixels of the display panel without using glasses, for example, Japanese Patent No. 3585781 (Patent Document 5) discloses the following technique. This technique is characterized in that it includes a guide, and the thickness of the first side is formed to be thicker than the thickness of the second side facing the first side, and the second wedge type light guide and the second type of light guide ' And the first side of the second wedge light guide is overlapped with the second side of the second light guide; the first light source provided on the first side of the second horizontal light guide; a second light source of the first side of the wedge-shaped light guide; a thin film (fllm) provided on the light guide; and the light of the ith light source and the second light source emitted from the light guide Converting into an angle corresponding to the second parallax and the second parallax; a transmissive display panel on the germanium film; and a synchronous driving unit, wherein the first light source and the second antenna simultaneously synchronize the i-th parallax image The second parallax image is displayed on the display panel. The first parallax image is displayed on the display of the φ plate, and the ith light source is turned on in synchronization with the display 4 in which the second parallax is reproduced on the panel of the age panel. Thereby, the work parallax image and the second sight image are displayed on the display panel in a time-sharing manner. [Patent Document 1] [Patent Document 1] Japanese Patent No. 2__1() 6() No. 22 [Patent Document 2] Japanese Patent Laid-Open No. 2〇〇5_2〇3182 [Patent Document 3] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. In the surface light source device in which two prism sheets are arranged in a substantially orthogonal manner, the light diffused from the light guide body is refracted, thereby adjusting the emission direction of the light from the light source device. Since the above-described method refracts the ship's class and thereby controls the directionality, since the number of optical sheets used is large, defects such as scratches are not observed in the conventional surface light source device. On the other hand, in the surface secret device disclosed in Patent Document 1, 'the light having a very high directivity is emitted from the light guide, and the emitted light from the light guide is totally reflected by the array of the cymbal. Thereby, the emission direction of the light from the surface light source device is controlled, thereby achieving high luminance performance. In such a surface light source device, although the luminance performance can be improved, there is a disadvantage in that the shape must be controlled very precisely, and the light guide is caused by pressing the surface light source device or vibrating the surface light source device. When the body is rubbed against other members, the scratches on the light guide body or the breakage of the tip end portion of the longitudinal reticle of the light guide body are easily regarded as white spots (a problem of locally producing a bright portion) or adhesion. (sticking) (The problem that the optical performance partially changes in 201124778 due to the optically close contact of the members with each other). Defects as described above are particularly significant between the real guide wire and the 'ie' reflective element. Moreover, due to the light display device (10) in recent years, the light guide body is often squeezed by the frame of the reflector or the frame of the action device; 1, so that white spots or adhesion are easily generated. Right, in order to make the lack of visibility of the above position = ' _ can make the white point become inconspicuous, but there is a problem that the brightness is low. Further, it has been studied to carry out special processing for the surface of the light-reflecting member that is adjacent to the light-guiding body, and the cost of the light-reflecting element caused by such processing is increased. On the other hand, in the surface light source device disclosed in Patent Document 2, although the sheet material can be prevented from adhering to the light reflecting surface and uniform luminance can be obtained, there is a disadvantage in that if the convex portion or the concave portion is made When the density is lowered, the effect of preventing the adhesion is weakened, and if the density is increased, the emission characteristics are affected' and the pattern of the convex portion or the concave portion can be observed through the light guide plate. On the other hand, in the surface light source device disclosed in Patent Document 3, the light collecting efficiency of the light emitted through the cymbal sheet and the diffusion sheet can be improved. However, there is a disadvantage in that the surface light source device is exemplified. The angle between the surface of the convex portion facing the light source side and the light reflecting surface is in the range of 10° to 45°, and the angle between the projection line of the normal line and the optical axis of the light source is 30. ~75. In the range of the angle, it is not possible to efficiently condense light emitted from the light exit surface of the light guide plate by the following cymbal, and the cymbal sheet extends in a direction parallel to the light incident end surface, and There are three 201124778 angular prism columns on the side facing the light exit surface of the light guide plate. On the other hand, in the surface light source device disclosed in Patent Document 4, although the shape of the specific light guide plate is not δ, the peak angle of the emitted light is 70 degrees and is distributed to 80 degrees according to the drawings in the specification. In the vicinity of the degree, a light exiting mechanism is provided on the light exit surface or the light reflecting surface of the light guide plate. In general, the light exiting mechanism is processed by matting. Further, in order to make the brightness uniform regardless of the distance from the light source, it is necessary to increase the roughness of the rough surface as it goes away from the light source. Thereby, the peak angle changes or the distribution becomes wider, and therefore there is a disadvantage that the light emission direction or the light distribution cannot be controlled regardless of the number of prism sheets Φ used. The problem to be solved by the present invention is to provide a high-brightness and high-quality image display device capable of suppressing a decrease in luminance performance in an image display device using a surface light source device using an end face illumination while preventing The generation of optical defects such as white spots. And the problem to be solved is to use a light guide body that can inexpensively pick up the occupant's image display device, thereby connecting the occurrence of the dropout defect or the contact with the light reflecting element. The area is reduced, and it is possible to prevent the cost of the lens array from being caused by the broken (four) marks at the front end of the light guide body. The production of IGe adhesion, thus ending 201124778 according to the present invention, θ# is an invention for solving at least one problem of the above problem towel, providing a kind of image display, including: a guide wire; a bract, adjacent to the light guide body Arranged on the light exit surface, and a plurality of arrays are formed on the human filaments facing the light output ί of the light guide body, and the plurality of arrays extend substantially in a direction parallel to the light human incident end faces and are mutually Arranged substantially in parallel; a primary light source disposed adjacent to the light-emitting end face of the loading member; and a display panel. The image display device is characterized in that the light guide body guides light from a line emitted from the secondary light source, and includes an end face of the light emitted from the light emitted from the secondary light source, and the guided light is guided. a light emitting surface emitted from the β blade and a light reflecting surface opposite to the light emitting surface, wherein at least one of the light reflecting surface and the light emitting surface includes a plurality of lens columns, and the plurality of lens columns are substantially vertical Arranging in a direction perpendicular to the light incident end surface and substantially parallel to each other; a plurality of convex structures interposed on the light reflecting surface; and a height of each of the plurality of convex structures protruding from the light reflecting surface 2 μιη or more; in the effective display area _ of the light reflecting surface, in the range of the circle having the radius of the convex structure and having a radius of 1〇〇 times the height of the convex structure, there are two The other convex structures described above. By providing the convex structure as described above, the contact area between the light reflecting surface of the light guiding member and the member such as the light reflecting element is reduced, thereby preventing occurrence of adhesion and optical defects such as white spots caused by the adhesion. The production. In one aspect of the invention, the plurality of lens rows are disposed on the light reflecting surface, and the convex structure is attached to a top of the lens row. In this case, in particular, the occurrence of chipping at the front end of the lens column of the light guide body can be prevented, and the entire front end of the lens can be prevented from being damaged and a strip of optical light is emitted. The plurality of lens rows are formed on the second reflecting surface. The light reflecting surface includes a mirror surface or an average tilt angle to be a convex surface. In this case, the optical defect of the surface is hard to be seen, especially because the lens of the light guide has a function of diffusing the light from the light guide. J is a first embodiment of the present invention, wherein the convex structure: j is formed on the two sides of the plurality of lens array light emitting surfaces, and the convex structure: j is formed on the concave surface . In particular, the contact area of the light-reflecting surface of the light guide body with the light = can be reduced in the inch π', and the occurrence of sticking of the adhesion or the like can be prevented, and the light guide can be prevented. = the entire front end of the strip of optically defective lens strips is damaged in a shape - the above light guide body includes a light incident on the normal direction including the light exit surface and along the lens column In the shape of the cross-section of the extending direction, the height of the region increases as it goes away from the end face of the light-emitting person; and the height of the r-region is reduced by 7 degrees or less as it goes away from the light-incident end face. In this case, the convex structure is made especially so that the light of the light guide body is extremely fused, so that the occurrence of optical defects can be prevented, and a bright image display device. In one aspect of the present invention, the convex structure is formed in a shape including a cross section of the light emitting surface in a normal direction and along a direction in which the lens row extends, the inclination of the first region The angle is 42 2 degrees or more. In this case, especially the light transmitted inside the light guide body does not reach the contact point of the light guide body and the member such as the light reflection π member, and even if the contact point with the member such as the light reflection element is damaged, it does not look. By the point of 'therefore, it is more effective to prevent the occurrence of learning defects. In one aspect of the invention, the convex structure has at least one of the following changes (into) to (D):
(Α)變化，隨著遠離上述光入射端面，上 的延伸方向的平均間隔變短； ^ J (B) 變化，隨著遠離上述光人射端面，上述透鏡列 的延伸方向的長度變長； (C) 變化，隨者返離上述光入射端面，高度變高； (D) 變化，隨著遠離上述光入射端面，上述第^區 域的平均傾斜角變大。 °° 於該情形時，尤其與光反射元件等的構件的週期 之間的干涉條紋等的產生得以抑制。 於本發明的-個形態中，上述導光體包括彼此位於相 反側的兩個光人射端面’上述—次光源包括··鄰接於上述 兩個光入射端面中的一個光入射端面而配置的第丨二次 源、以及鄰接於上述兩個光入射端面中的另一個二 面而配置的第2—次光源。 所艰 於本發明的一個形態中，上述凸狀構造於包含上述光 201124778 出射面的法線方向且沿著上述透鏡列的延伸方向的剖面 1狀中，包括··第1區域，高度隨著朝上述導光體的中央 遠離上述光入射端面而增加；以及第2區域，高度隨著朝 上述導光體的中央遠離上述光入射端面而減少或不^，上 述第2區域的平均傾斜角為7度以下。於該情形時，尤其 由於凸狀構造，使得導光體的光的出射特性不會大幅度^ 發生變化，因此，可防止光學缺陷的產生，並且可二 勻且明亮的影像顯示裝置。 ，、句 於本發明的一個形態中，上述凸狀構造於包含上述光 出射面的法線方向且沿著上述透鏡列的延伸方向的剖面的 形狀中，上述第1區域的傾斜角為42 2度以上。於該情形 時，尤其在導光體内部傳輸的光不會到達導光體與光反射 元件等的構件的接觸點，即便與光反射元件等的構件的接 觸點受損，亦不會看到自點，因此，可更有效果地防止光 學缺陷的產生。 於本發明的一個形態中’上述凸狀構造具有下述（Α，） 〜（D’）的變化中的至少一種變化： (Α’）變化，隨著朝上述導光體的中央遠離上述光入 射端面’上述透鏡列的延伸方向的平均間隔變短； (Β·)變化，隨著朝上述導光體的中央遠離上述光入 射端面’上述透鏡列的延伸方向的長度變長； (c’）變化，隨著朝上述導光體的中央遠離上述光入 射端面，高度變高； (D')變化，隨著朝上述導光體的中央遠離上述光入 15 201124778 射端面，上述第2區域的平均傾斜角變大。 於該情形時’尤其與光反射元件等的構件的週期構造 之間的干涉條紋等的產生得以抑制。 於本發明的一個形態中，上述影像顯示裝置更包括同 步驅動單元，該同步驅動單元與上述第丨一次光源的點燈 同步地使第1影像顯示於上述透射型顯示面板的第〖顯^ 晝面區域，且與上述第2 —次光源的點燈同步地使第2影 像顯示於上述透射型顯示面板的第2顯示畫面區域。和 於本發明的一個形態中，上述影像顯示裝置更包括交 替地進行第1視野影像顯示與第2視野影像顯示的同步驅 動單元，上述第丨視野影像顯示與上述第丨一次光源的點 燈同步地顯示第1視㈣像於上述透射賴示面板，上述 顯示與上述第2 一次光源的點燈同步地顯示 第2視野衫像於上述透射型顯示面板。 於本發明的-個形態中，上述導光體以與上述 的延伸方向及上絲出射面的法線方向均 心而彎曲。 J乃Π马肀 根據本發明的影像顯示裝置，可使導光體的光 八光反射7L件等的構件的接觸面積減少，從而可防止 的產生、以及由該細引起的自點等的光學缺陷的 t ’可提供-種使用薄型、高亮度、亮度均齊度高且高 口口質的面光源裝置的影像顯示裝置。 门 【實施方式】 以下，-方面參照圖式，一方面對本發明的實施形態 201124778 進行說明。 圖1是表示本發明中所使用的面光源裝置的一個實施 形態的模式性立體圖，圖2是上述面光源裝置的一次光源 附近部分的模式性分解立體圖。如圖1所示，本實施形態 的面光源裝置包括：導光體4，將至少一個側端面設為光 入射端面41，且將與該側端面大致正交的一個表面設為光 出射面43 ; —次光源2，與上述導光體4的光入射端面41 相向且鄰接地配置，且由反射器（reflector) 1〇所覆蓋； 光偏轉元件6,與導光體4的光出射面相向且鄰接地配置； 以及光反射元件8 ’與導光體4的光出射面43相反側的光 反射面44相向且鄰接地配置。作為一次光源2，可使用冷 陰極管（冷陰極螢光燈（Cold Cathode Flu〇rescent Lamp， CCFL))，亦可使用排列有點狀光源（發光二極體（Light Emitting Diode，LED))的光源。根據實現面光源裝置的 薄型化、省電力化的觀點，較佳為將排列有多個led等的 點狀光源的光源用作一次光源2，於以下的說明中，對將 如下的光源用作-次光源的例子進行說明，該光源排列有 多個LED作為-次光源。較佳為以使自多個咖發出的 光的最大強度光的方向彼此平行的方式來配置多個 LED。自LED發出的光的最大強度光的方向例如可設 方向。 °… (導光體） 、導光體4是與ΧΥ面平行地配置，且整體呈矩形板 導光體4包括四個側端面，該四個侧端面中的與面大 17 201124778 致平行的一對側端面中的一個端面設為光入射端面41，以 與該光入射端面相向的方式而鄰接地配置有led。導光體 4的與YZ面大致平行的一對側端面中的另一個側端面設 為與光入射端面為相反侧的相反端面42。導光體4的與光 入射端面41大致正交的兩個主面均配置為與z方向大致 正交，作為其中一個主面的上表面設為光出射面43。 (導光體的光出射面的構成） 如圖2所示，該光出射面43可包括：包含具有作為光 出射控制功能構造的微細凹凸構造的粗縫面43a的區域及/ 或形成有多個透鏡列（第2透鏡列）43b的區域。亦即， 光出射面43包括粗猶:面43a及/或第2透鏡列43b。該第2 透鏡列43b較佳為大致沿著X方向延伸，且彼此大致平行 地排列，該X方向是自一次光源2 (LED)發出且導入至 導光體4的光的最大強度光的、於沿著光出射面43的面内 的方向（即’於沿著光出射面43的面内，入射至導光體光 入射端面41且導入至導光體4内的最大強度光的指向性的 方向）。亦即’對於彼此大致平行地排列的第2透鏡列43b 的各個透鏡而言，較佳為以大致沿著垂直於光出射面43 與光入射端面41的邊界的方向即X方向延伸的方式而形 成。再者，此處所謂的「光出射面43與光入射端面41的 邊界」中的「光出射面43」，是指不包括粗糙面43a及透 鏡列43b的形狀的光出射面，具體而言，該「光出射面43」 與XY面平行。亦即’此處所謂的「光出射面43與光入射 端面41的邊界」大致沿著γ方向延伸。於本發明中，將 18 201124778 如上所述的形態規定為「透鏡列43b大致沿著垂直於光入 射端面41的方向延伸」。 對於第2透鏡列43b而言，可根據LED的配置間隔， 將與該第2透鏡列43b的延伸方向正交的剖面的形狀設為 圓弧形狀、V字形狀、前端呈R形狀的V字形狀、正弦曲 線（sine curve)、抛物線形狀、以及雙凸透鏡（lenticular lens ) 形狀等的所需形狀。第2透鏡列43b具有規則地對通過其 的光線或其所反射的光線的方向進行控制的功能，且該第 2透鏡列43b具有使自點狀的一次光源射出的光擴散的功 能。因此，剖面形狀較佳為具有多個角度成分的圓弧形狀、 或前端呈R形狀的V字形狀。 於上述剖面内，當使用圓弧形狀或前端呈R形狀的V 子形狀來作為第2透鏡列43b的形狀時，該第2透鏡列43b 的曲率半徑例如為5μιη〜200 μιη，較佳為7pm〜120pm， 更佳為10 μιη〜50 μηι。又，第2透鏡列43b的排列間距 (pitch)例如為 1〇 較佳為 1〇μιη〜15〇μιη， 更佳為20 μηι〜1〇〇 μιη，只要與上述曲率半徑加以組合而 獲得所需的形狀即可。 又，於任一個形狀的情形時，亦可將第2透鏡列43b 的表面即構成該透鏡列的透鏡面（亦稱為透鏡列的「斜面」) 予以粗糙面化。粗糙面具有使光隨機地擴散的功能。藉由 將透鏡列的斜面予以粗糙面化，可將兩者的功能加以混 合，從而更有效果地消除亮度不均。根據透鏡列斜面的粗 糖面化程度的不同’規則性方向控制功能所產生的效果盘 201124778 隨機擴散功能所產生的效果的比例會發生變化，但關於斜 面的粗糙面化的程度’以斜面作為基準面的後述的平均傾 斜角較佳為0.1度〜10度，更佳為0.5度〜3度。若平均 傾斜角為0.5度以上，則可充分地獲得由粗縫面產生的擴 散效果，若平均傾斜角為3度以下，則可充分地獲得透鏡 列的規則性方向控制效果。 光出射面43上的形成有第2透鏡列43b的區域為接近 於光入射端面的區域或整個光入射端面。接近於光入射端 面的區域可設為沿著與光入射端面41鄰接的光出射面43 的端緣而延伸的帶狀區域。形成有該第2透鏡列43b的區 域並無特別限制，亦可形成於整個光出射面，但較佳為位 於後述的有效顯示區域F之外，亦即，較佳為位於與光入 射端面41鄰接的光出射面43的端緣（換言之為上述光出 射面43與光人射端面41的邊界）與有效顯示區域f所夹 持的部分（入射側端緣部）。若朝有效顯示區域F内凸出 地形成第2透鏡列伽，則形成有第2透鏡列伽的區域 與此區域以外的區域的邊界線有時會出現於有效顯示區域 從而導致看到亮度不均。又，形成有第2透鏡列伽 的帶狀區蘭寬度難為可充分獲得上述作用效果的大 小’例如較佳為導光_厚度的2倍以上。若 ί鏡過；1、’則有時無法充分獲得上述作用效 無法錢讀不均。可根據亮度不均的影響為何 ίίϋ及該Μ不均的影響是否處於允許範圍内等，來 U地決定是將第2透鏡列僅形成於與光入射端面 201124778 接近的區域，還是將第2透鏡列形成於整個光出射面。 如圖1所示，當將透射型液晶顯示元件等的顯示元 配置於面光源裝置的發光面上而構成液晶顯示裴置等的 示裝置時，所謂有效顯示區域F，是指面光源麥:的路 出實際上綴進行照明讀顯示裝置有效地顯示的光 域（亦即，與顯示裝置的有效的顯示區域相對應的面光源 裝置的區域）。該有效顯示區域F例如亦可為導先體光出 射面43内的區域以及導光體的光反射面44内的區域。於 多數情形時，相對於面光源裝置的發光區域， 龜 示區域F是以對角線長度計為1 mm〜5 mm左右的小區 域。又，對於導光體的光出射面43而言，自鄰接於導光體 4的光入射端面41的端緣至有效顯示區域1? 取決於面光源裝㈣形㈣及尺寸（㈣），—般為 〜10 mm左右。 、光出射面43上的形成有第2透鏡列43b的區域亦可部 分地存在於上述入射側端緣部的寬度方向（即，X方向） ^二然而，為了進一步使上述第2透鏡列43b的作用效果 提高，、該區域的寬度較佳為入射側端緣部的寬度的1/2以 上，尤佳為入射側端緣部的整個寬度（即，全寬）。 再者，於本發明中，當於光反射面44上形成有第！ 透鏡列咏時，亦可不於光出射面43上形成第2透鏡列 43b。 亦可於光出射面43的未設置有第2透鏡列43b的區域 中’形成具有微細凹凸構造的祕面⑽。藉由設置粗輪 21 201124778 面43a來使如下的光射出，該光在包括光出射面43的法線 方向（Z方向）及與光入射端面41正交的X方向該兩個 方向的XZ面内的分布中具有指向性。該出射光分布的峰 值方向與光出射面所成的角度例如為1〇。〜4〇。，出射光分 布的半高全寬值例如為10。〜40。。 —可依據IS04287/1-1984，使用觸針式表面粗糙度計來 測定粗糙面形狀，將測定方向的座標設為X，根據所獲得 的傾斜函數f (X)且使用如下的（1)式以及（2)式 △a= (1/L) J〇L | (d/dx) f (X) | dx· • (2) eaian·1 (△&) 來求出形成於導光體4的光出射面43且具有作為光 射控制功能構造的微細凹凸構造的城面43a的平均傾 此處n収長度，Aa為平均傾斜肖0a的正甘 =於粗縫面43a而言’考慮到實現光出射面43内的亮度 上齊度’較佳為使依據is〇4287/M984的平均傾斜角又 =(U度〜H)度的範圍。平均傾斜角0a的更佳的範圍 u·2度〜8度，進而更佳的範圍為〇 3度〜5度。 (導光體的光反射面的構成） 本發明中所使用的導光體的—個實施形) 述導紐4)秘式性讀目，目 模式性Μ剖面圖(ΥΖ剖面圖)，圖5是表示上== 22 201124778 光反射面的模式圖，圖6是圖4的模式性N剖面圖 剖面圖）。 一方面參照圖2〜圖6’一方面對導光體4的光反射面 44的構成進行說明。於導光體4的光出射面幻的相反側 的主面（即，光反射面⑷上，形成有大致沿著橫跨光入 射端面41的方向例如與光入射端面41大致垂直的方向 (即，沿著光出射面43的面内的入射至導光體4的光的指 向性的方向即X方向）而彼此平行地延伸的多個透鏡列（第 1透鏡列）44a，以對來自光出射面43的出射光於與led 的排列方向平行的YZ面内的指向性進行控制。亦即，光 反射面44包括第1透鏡列44a。彼此大致平行地排列的第 1透鏡列44a分別大致沿著垂直於光反射面44與光入射端 面41的邊界的方向即X方向而延伸。再者，此處所謂的 「光反射面44與光入射端面41的邊界」中的「光反射面 44」’是指不包括第1透鏡列44a的形狀的光反射面具體 而言，該「光反射面44」與XY面平行。亦即，此處所謂 的「光反射面44與光入射端面41的邊界」大致沿著γ方 向延伸。 較佳為使用前端呈R形狀的稜鏡列或雙凸透鏡列來作 為第1透鏡列44a。於本發明中，較佳為使用如下的第i 透鏡列44a，即，於與該透鏡列44a的延伸方向正交的剖 面的形狀中，第1透鏡列的縱橫比即第1透鏡列44a的排 列間距（P1)與高度（H1)之比（P1/H1)為7〜200，較 佳為8〜150，更佳為1〇〜1〇〇，剖面形狀為圓弧或前端為 23 201124778 曲線。原因在於：藉由使第1透鏡列44a的縱橫比處於上 述範圍，可充分地使來自光出射面43的出射光聚光，而且 可防止由透鏡列的破損或碎裂、以及與光反射元件8摩擦 所引起的白點的產生。亦即，藉由使第1透鏡列44a的形 狀處於上述範圍内，可使如下的經聚光的出射光射出，從 而可使面光源裝置的亮度提高，上述經聚光的出射光在包 含出射光分布中的峰值光方向的垂直於xz面的面上，其 出射光分布的半高全寬值為30。〜65。。第1透鏡列44a的 排列間距P1例如為1〇 pm〜2〇〇 ，較佳為μπι〜ΐ5〇 μιη，更佳為20 μπι〜100 μϊη。又，第1透鏡列44a的前端 部的剖面形狀較佳呈曲率半徑R為25 μιη〜3〇〇 μιη的圓弧 形狀，但並不特別限定於圓弧形狀，亦可為能夠近似於該 ，弧=狀的形狀。又，對於第1透鏡列44a的剖面形狀而 言，前端部以外的部分亦可呈曲線形狀，例如亦可為由正 弦曲線等所表示的波形狀。 、又，當於上述光出射面43上存在第2透鏡列43b時， 尤其當於光出射面43的大半的區域中整體地存在第2透鏡 列43b時，光反射面44亦可包含鏡面或平均傾斜角為 度以⑽凹凸面。當光出射面43未經粗縫面化面 43a等）時’較佳為將光反射面44設為平均傾斜角為4度 以内的凹凸面。 (導光體光反射面的凸狀構造） ，如圖3所示，當於導光體4的光反射面44上存在第1 透鏡列44a時，於第1透鏡列输的前端部分（最高位置 24 201124778 的部分：即’頂部）’散布（分散）地形成有多個凸狀構造 45。圖4表示與光入射端面41平行的面（圖3的沿著點線 M的剖面）中的第1透鏡列44a的剖面形狀。凸狀構造45 分別是以自第1透鏡列的前端部分突出的最大高度（即， 2方向的最大高度）為2 μιη以上的方式而形成。亦即，各 個凸狀構造45的自光反射面44突出的高度為2 μηι以上。 又，關於多個凸狀構造45，於光反射面的有效顯示區域内 (即，於ΧΥ面内），在以任意的凸狀構造45為中心且具 有該凸狀構造45的突出高度的1〇〇倍的半徑的圓（參照圖 5的R’）的範圍内，除了作為中心的凸狀構造45之外，配 置有兩個以上的凸狀構造45 (參照圖5)。如此，以於光反 射面44内，在規定的範圍内存在規定數量的凸狀構造 =方，，將該凸狀構造45設置於第1透鏡列44a的前端部 分，藉此，可使導光體4與光反射元件8的接觸面積減少。 因此可防止由於導光體4與光反射元件8的接觸而使整 個導光體4的透鏡列受賴傷。結果，可防止白點或黏附 等的光學缺陷的產生。 ’ 若凸狀構造45的突出高度小於2帅，則難以防止第 1透鏡列44a的前端部分與光反射元件8接觸，從而有可 能無法防止白點或黏附等的產生。又，若存在於以&狀構 =5為中心且具有該凸狀構造45的突出高度的倍的 半=的圓的範圍内的其他凸狀構造45的數量少於2 =由凸狀構造45來防止光反射元件8與第i透鏡列咏 的則端部的接觸’從而有可能無法防止白點或黏附等的光 25 201124778 j陷的產生。根據充分地確保防止接觸的效果的觀點， ,、他凸狀構造45的數量的下限值較佳為3以上‘· 以上’尤佳為7以上。又’其他凸狀構造45魄量的^限 值並無特別的限制，但數量越多’則凸狀構造45盥 元件8的接觸面積增大，結果，有可能無法防/白點或黏 附等的光學缺關產生，因此，其他凸狀構造45的數量的 上限值較佳為300以下，更佳為雇以下，尤佳為⑽以 下0 又’凸狀構造45的與光人射端面平行的面的剖面形狀 較佳设為剛端由曲線構成的三角形狀或圓弧形狀。藉由設 為此種形狀，可防止凸狀構造45的前端部的碎裂。較佳2 將YZ剖面内的凸狀構造45的前端的曲率半徑R設定為i μιη以上且為1〇〇 以下，較佳為2 μιη以上且為％ 以下，更佳為4 μιη以上且為20 μηι以下。若前端的曲率 半徑R過小，則無法轉印至前端為止，成形穩定性容易變 得不佳，若刖端的曲率半徑r過大，則防止白點或黏附等 的光學缺陷的產生的效果容易降低。凸狀構造45容易引起 與自X光源2發出的光的波長相同程度的大小的色散 (chromatic dispersion)，若該色散非常大，則導致可由肉 眼看出上述凸狀構造。.因此，對於與光入射端面平行的面 的剖面形狀而言，較佳為將凸狀構造45的寬度（γ方向尺 寸）5又疋為3 μιη以上且為7 5 μηι以下，較佳為4 μιη以上 且為50 μιη以下，更佳為7 μιη以上且為30 μιη以下。 圖6表示沿著第1透鏡列44a的延伸方向（圖4的線 26 201124778 N)的面中的第1透鏡列糾及凸狀構造45的剖面形狀。 可適當地選擇凸狀構造45的形狀，例示了包括第i區域 45a與第2區域45b的構成，該第1區域45a沿著第1透 鏡列44a的延伸方向，高度隨著遠離光入射端面41而增 加、，上述第2區域45b在第丨區域45a之後，高度隨著遠 離光入射端面而逐漸減少。對於第2區域45b而言，若高 度急遽地發生變化，則於導光體4的光入射端面41附近與 相反端面42處難以取得亮度的平衡（balance)，從而有時 難以提供均勻綱亮的面杨裝置。因此，第2區域祝 的平均傾斜角較佳設為0.5度以上且為7度以下。又’第 2區域45b亦可包括高度不發生變化的平坦區域。該平坦 區域例如設置於與第i區域45a鄰接的部分。當第2區域 45b包含平坦區域時，第2區域45b的平均傾斜角是指亦 包含平坦區域的平均傾斜角。凸狀構造45會引起與自一次 光=2發出的光的波長相同程度的大小的色散，若該色散 非常大’則導致可由肉眼看出該凸狀構造。因此，凸狀構 造45的沿著第丨透鏡列的延伸方向的長度較佳為處於 μιη 至 250 μιη 之間。 又’凸狀構造45可沿著第1透鏡列44a而等間隔地設 置亦了知機地配置，但藉由週期性地設置凸狀構造45， 谷易產生與其他光學構件之間的干涉條紋等，因此，根據 防止該干涉條紋的誠，較佳為隨機地配置上述凸狀構造 45。又，不僅凸狀構造45的間隔可隨機地變動，而且凸狀 構造45的大小（第丨透鏡列的延伸方向的長度尺寸及與第 27 201124778 1透鏡列的延伸方向正交的方向的寬度尺寸）本身亦可隨 機地變動，間隔以及大小均可隨機地變動。而且，多個凸 狀構造45❾南度亦可隨機地變動。再者，即便當凸狀構造 45的尚度隨機地變動時，在以任意的凸狀構造45為中心 且具有該凸狀構造45的高度的刚倍的半徑的圓的範圍 内’配置有2個以上的向度為2 μιη以上的其他凸狀構造 45 (不包括作為中心的凸狀構造45 )。 於形成使凸狀構造45的高度隨機地發生變動的構造 的情形’當製造對形狀進行轉印的模具（相#於後述的成 幵ν用模/、構件）時n人有壓電元件的振動I置設置於 鑽石車·置，將無職__信號（nGise signal)輸 入至振，裝置，-方面使鑽石車刀隨機地振動，—方面對 模具進打加工，藉此，可獲得圖㈣深度隨機地發生變化 的形狀。鑽石車77的絲方向可僅設為與2 方向’亦可設為與Z方向相對應的方向及 上： 的方向該兩個方向。 應 姐、又’當形成使沿著第1透鏡列44a的延伸方向的凸狀 造45的長度或卩梅賴地發生㈣的構造時，亦可 面使鑽石車刀的進給速度隨機地發生㈣， 進行加工。 叫玎稞丹 使=期性的雜訊信號產生的方法可使用眾所 ^法’將如下的波形輸人至振動裝置而驅動該 =丄等的動作隨機，上述波形例如為ί雜 δ刀 > 自所需的m (flltei·)對鮮進行截取所 28 201124778 得的雜訊㈣或sm㈣的基本波形中經霞而成的波 形以及為了消除週期性而編入的假隨機波形等。 ^凸狀構造45的高度的振動（變動）的振幅大，則可有 效果地使白點或黏附的產生減少。然而，隨著振幅變大， 存在如下賴向，g卩，加I易變得不穩定，易於產生毛邊 (burr)或條紋、加工面的皺褶等的外觀缺陷。如此，於 2工方面，小振幅則較佳，但若凸狀構造45的高度的變化 I不足ίο%，則存在使黏附或白點減少的效果變小的傾 向。又，若凸狀構造45的高度的變化量超過8〇%，則存 在如下的傾向，即，易於產生外觀缺陷，且面光源裝置亦 易於產生炫光。因此，凸狀構造45的高度的變動較佳為包 含超過凸狀構造45的平均高度的5〇%且為8〇%以下的範 圍，於10%〜80%的範圍内隨機地發生變動。 圖7是表示由凸狀構造45引起的光反射的情況的圖。 如圖7所示，對於凸狀構造45的第1區域45a而言， 沿著第1透鏡列44a的延伸方向的剖面形狀亦可具有陡峭 的角度。自一次光源2發出且導入至導光體4的内部的光 一方面於光出射面43及光反射面44上被反射’一方面在 導光體内部傳輸。以特定的角度以下的角度到達光出射面 43的光被光出射面43反射之後’進一步在導光體4内部 傳輸，以特定的角度以上的角度到達光出射面43的光自該 光出射面43射出。 此處，一方面參照圖7，一方面對光線80進行說明， 該光線80以如下的（3)式 29 201124778 a=arcsin ( 1/n) ... (3) 所定義的臨界角α而入射至光出射面43之後被反 射，接著通過第1區域45a與第1透鏡列44a的前端的交 點即點A。此處，η為導光體4的折射率。光線80於點D 處到達第2區域45b。此處’凸狀構造45的最突出的點C 位於比點D更靠近光入射端面41的一侧^在導光體内部 進行反射傳輸的光中’並不存在角度會超過臨界角的光 線，因此’通過點A的光線中，相對於光出射面43而以 最大角度被反射的光成為光線80。因此，藉由將點c設置 於比點E)更靠近光入射端面的一侧，使在導光體4内部傳 輸的光不會到達點C。 以上述方式構成的導光體4於點C處，與配置於該導 光體4的下側的光反射元件8或面光源裴置的框體（未圖 示）接觸。此時，由於導光體4與其他構件接觸，因此， 即便點C受損，如上所述，由於在導光體4内部傳輸的光 並不到達點C ’故而可防止如先前的導光體般，將劃痕看 成白點缺陷。更具體而言，當將折射率為丨.46的丙烯^材 料用作導光體4時，基於arcsin (1/1.46)，該導光體4與 折射率為1的空氣的界面的臨界角α為42.2度，因此，^ 由將第1區域45a的傾斜角度設為42.2度以上，可更有^ 果地防止白點等的光學缺陷的產生。 凸狀構造45較佳為具有下述（A)〜（d)的變化中 30 201124778 的至少一種變化： (A) 變化’隨著遠離光入射端面41，第1透鏡列44a 的延伸方向的平均間隔變短； (B) 變化’隨著遠離光入射端面41，第1透鏡列44a 的延伸方向的長度變長； (C) 變化’隨著遠離光入射端面μ，高度變高； (D) 變化’隨著遠離光入射端面41，第2區域45b 的平均傾斜角變大。 藉此’與其他光學構件的週期構造的干涉條紋等的產 生受到抑制。 再者，作為導光體4的光出射功能構造，可併用形成 於如上所述的光出射面43及/或光反射面 44的透鏡列或粗 輪面，使用藉由使光擴散性微粒子混入分散至導光體4的 内部而形成的構造。又，作為導光體4,除了可使用如圖1 及圖2所示的整體為相同厚度（忽視光出射面43的粗糙面 的微細凹凸形狀及透鏡列形狀以及光反射面44的透鏡列 形狀等時的厚度）的板狀的導光體之外，還可使用厚度於 X方向上自光入射端面41朝相反端面42逐步變小的楔狀 導光體等的各種剖面形狀的導光體。而且，亦可將導光體 4的光出射面43的有效顯示區域F設為鏡面，且將光反射 面44的第1透鏡列44a的表面設為粗輪面。於該情形時， 考慮到實現光出射面43内的亮度的均齊度，較佳為以第i 透鏡列44a的斜面為基準面，使第！透鏡列44a的表面的 平均傾斜角0a處於0.1度〜10度的範圍。平均傾斜角ea 31 201124778 5的度更佳的範圍為°.2度〜8度’進而更佳的範圍為。.3度〜 導光體4的厚度例如為0.3 mm〜1〇 m 上 ^ mnj 〇 (導光體的製造方法） 性樹形= 可===時’對模具素材的所需區域(亦 具有作為目標的所需 ^作為目標的所需的表面形狀為如粗輪面43 使用顿blasting)處理作為如上所述的處的理粗 根據喷擊處理的岐性的誠，闕轉處理巾，喷擊喷 ^Wasting nGzzle)與模具錄之_轉較佳為維持固 疋。可使帛如賴珠（glass beads )躺£珠（^ 般的球形狀的粒子；或如氧德（alumina)粒子般的 形狀的粒子作為噴擊粒子。 又，當作為目標的所需的表面雜為如第1透鏡列44a 或第2透鏡列43b般的透鏡列時，可將使用有錢石車刀等 的切削工具的切削加工用作上述處理。 又’當作為目標的所需的表面形狀為如設置於第1透 鏡列44a的前端部分的凸狀構造45般的凸狀構造時，可將 雷射（laser)加工、使用有鑽石車刀等的切削工具的切削 32 201124778 加工等的各種方法用作上述處理。 光偏轉元件6配置於導光體4的光出射面43上。光偏 轉元件6的兩個主面分別整體上與χγ面大致平行。兩個 主面中的一個主面（與導光體的光出射面43相向的主面） 設為入光面61，另一個主面設為出光面62。該出光面62 為與導光體4的光出射面43平行的平坦面或粗糙面。入光 面61為彼此平行地排列有多個稜鏡列幻的稜鏡列形成面。 入光面61的稜鏡列65沿著與LED的排列方向大致平 行的Y方向延伸，且彼此平行地形成（即，於入光面ο 上’形成有沿著導光體光入射端面41而彼此平行地排列的 多個稜鏡列65)。稜鏡列65的排列間距P2較佳為處於1〇 μηι〜1〇0卿的範圍’更佳為處於1〇μιη〜8〇μιη的範圍， 進而更佳為處於20μπι〜70卿的範圍。又，稜鏡列65的 頂角較佳域於3〇。〜8〇。的_，更佳為處於4g。〜％ 範圍。 v 對於光偏轉元件6而言，為了精確地製作所 獲得穩定的光學性能，同時為了於組裝作業時 光源裝置時，抑制稜鏡_部的磨耗或變形，亦可 :稜鏡列的頂部形成頂部平坦部或頂部 == = ::亮度的降低或由_二亮 部下=部平坦部或頂 =μ下’進而更佳為1卿以下。 先偏轉元件6的厚度例如為3〇μιη〜35()μιη。 33 201124778 2表示由光偏轉元件6產生的光偏轉的情況。該圖 的來自導光體4的♦值出射光（與出射光分 =峰值相對應的光）的前進方向。自導光體㈣光出射 射屮^斜地射出的光，尤其是自有效顯示區域f傾斜地 ^出的光人射至稜鏡列65的第1面之後，被第2面全反 f ’接著在大致維持來自導光體4的出射光的指向性的狀 態下，朝出光面62的大致法線的方向射出。藉此，於紅 面内，在出光面62的法線的方向上可獲得高亮度。 光偏轉元件6發揮使來自導光體4的出射光朝作為目 標的方向偏轉（改變角度）的功能，當將該光偏轉元件6 與使如上所述的指向性高的光射出的導光體4加以組人 時，較佳為使用透鏡薄片，該透鏡薄片於至少一個面上^ ^由多個透鏡單元並排而形成的透鏡面。對於形成於透鏡 薄片的透鏡的形狀而言，可根據目的而使用各種形狀，例 如可列舉稜鏡形狀、雙凸透鏡形狀、複眼透鏡形狀、以及 波型形狀等。其中，並排地配置有剖面大致呈三角形狀的 多個稜鏡列的稜鏡片尤佳。然而’對於構成稜鏡列的兩個 稜鏡面中的至少一個梭鏡面而言，剖面亦可由多條直線構 成，或由一條以上的曲線構成’或者由一條以上的直線與 一條以上的曲線加以組合而構成。 導光體4以及光偏轉元件6可由光透射率高的合成樹 脂構成。作為此種合成樹脂’可例示曱基丙烯酸樹脂、丙 烯酸樹脂、聚碳酸酯系樹脂、聚酯系樹脂、氣乙烯系樹脂、 以及環狀聚稀烴樹脂。尤其甲基丙烯酸樹脂的光透射率 34 201124778 高，且耐熱性、力學特性、以及成形加工性優異，因此談 曱基丙烯酸樹脂最佳。此種甲基丙烯酸樹脂是以甲美丙^ 酸甲酯為主成分的樹脂，曱基丙烯酸曱酯較佳為8〇=%以 上。當形成導光體4以及光偏光元件6的粗糖面的=面°^ 造或稜鏡列等的表面構造時，可使用具有所需的表^構造 的模具構件來對透明合成樹脂板進行熱壓而形成上述構 造’亦可在藉由網版印刷（screen printing )、擠出成形咬 射出成形等來成形的同時，使上述透明合·丨脂板具^形 狀。又，亦可使用熱固性樹脂或光固性樹脂等來形成構造 面。而且’可於包含賴系樹脂、丙烯酸系樹脂、聚碳= 酯系樹脂、氯乙烯系樹脂、以及聚曱基丙烯醯亞胺系樹脂 等的透明薄膜或薄片等的透明基材的表面上，形成包含活 1"生月b !_射線硬化型樹脂的粗縫面構造或透鏡列 亦可藉由接著、焊接㈣方絲將如上所_=^於 ^外的透明基材上而實現-體化。可使用多官能（甲基)丙 烯酸化合物、乙稀基化合物、（曱基)丙烯酸g旨類、稀丙基 化合物、以及（曱基）丙烯酸的金屬鹽等作為活性能 硬化型樹脂。 光反射元件8例如可使用在表面具有金屬蒸鍍反射層 的塑膠薄片。於本發明中，亦可代替光反射耕，將藉由 金屬蒸鑛料形成於導紐4的歧㈣Μ的光反射層等 用作光反射元件8。再者，較佳為於導光體4的用作光入 射端面的端面以外的端面上亦設置反射構件。 為了以少損失來將自LED發出的光引導至導光體4 35 201124778 的光入射端面41 ’設置有反射器1〇。該反射器ι〇 使用在表面具有金屬蒸鍍反射層的塑膠薄膜。如如可 反射器10自光反射元件8的端緣部外表面經由’ 側而卷向光偏光元件ό的出光面端緣部。作為其 、外 反射器U)亦可避開光偏轉元件6 ’自光反射元件8 ^外表面經由LED的外側而捲向導光體4的光出射面= 於以上的實施形態中，使用有多個LED等的點狀一" 光源。於該情形時，較佳為以使自多個點狀光源發 = 的最大強度光的方向彼此平行的方式來配置多個點狀光 源0 於如上所述的包括LED、導絲4、域轉树6以 及光反射元件8的面統裝置的發光面（光偏轉元件6的 出光面62)上’配置透射型液晶顯示元件等的顯示元件（顯 示面板）’藉此來構成液晶顯示裝置等的影像顯示裝置。於 圖1中，符號F表示對應於與面光源裝置組合地使用的顯 示元件的有效顯示區域的該面光源裝置的上述有效顯示區 域。 於本實施形態中，反射器10配置為將有效顯示區域？ 以外的區域的光偏轉元件6、導光體4及光反射元件8的 積層體的端面部以及LED予以覆蓋。藉此，可使自積層體 的端面部射出的光以及自LED的殼體（case)洩漏的光於 χγ面内良好地擴散，經反射之後再次入射至導光體4，可 將所需強度的光引導至導光體光出射面43的廣泛的區 36 201124778 域’從而可有助於使亮度的均齊度提高。 一觀察者自圖1中的上方，透過液晶顯示元件等的 元件來觀察液晶顯示裝置等的影像顯示震置。由於: ^準直的狹窄分布的光自面光源1置人射至液晶顯示元 件’因此’液晶顯示元件中不存在灰階反轉等，可碎得明 亮度及色相的均勻性良好的影像顯示，同時可獲得ς 的方向集㈣光照射，從而可使對财向進行照明的一次 光源的發光光量的利用效率提高。 再者，可將光擴散元件7鄰接地配置於光偏轉元件6 的出光面62上。可藉由該光擴散元件7來抑制導致影像顯 不=品質降低的炫光或亮斑等’從而可使影像顯示的品質 ，尚。光擴散元件7可為混人有光擴散材料_片狀的元 件=光擴散凡件7可於光偏轉元件6的出光面62側藉由 偏轉元件6成為一體，亦可載置於該光偏 兀 上田光擴散元件7載置於光偏轉元件6上時， 為了防止光擴散元件7黏附於光偏轉元件6，較佳為使光 擴散兀件與光偏轉元件6相向的—側的面（Μ射側的面） 形成凸構ie而且，為了防止光擴散元件7的光出射側 的面”配置於麵上的液晶顯示元件之間雜附，較佳為 使該^擴散元件7的光出射側的面亦形成凹凸構造。該凹 凸構k可為如下的構造，即，十點平均粗縫度較佳為 以上’更佳為U。以上，進而更佳為1.5。以上。 1 以亡的實施形態中，於光反射面44以及光出射面 43上刀別6又置有第1透鏡列44a以及第2透鏡列43b。然 37 201124778 而’於本發明中，作為以上實施形態的變形的形態，例示 了透鏡列僅設置於光反射面44，或者透鏡列僅設置於光出 射面43。於後者的變形的形態中，當光反射面44為粗糙 面等的凹凸面時，凸狀構造45自光反射面44突出的高度 為與該凸部頂部相距的高度。 圖9是表示本發明中所使用的面光源裝置的其他實施 形態的模式性立體圖。於圖9中，對於具有與圖丨〜圖8 中的構件或部分相同的功能的構件或部分標記著相同的符 號。 於本實施形態中，導光體4的四個側端面中的與γζ 面大致平行的一對側端面（即，彼此位於相反侧的側端面） 均設為光入射端面41，以與上述兩個光入射端面41分別 相向的方式而鄰接地配置LED，這些兩側的LED由反射 器所覆蓋著。亦即’對於本實郷態而言，制將彼此位 於相反側的兩個端面分別設為上述光入射端面的兩端入射 型的導光體，相當於使參照圖i等所說明的實施形態中的 相反端面42側亦為與光入射端面41侧相同的構成。 本貫施形癌的兩端入射型的導光體於以下所示的方 面’與參照® 1等所朗的實施形態的導光體不同。這些 不同點主要與凸狀構造45的構成相關。 第1不同點在於：凸狀構造的第1區域於包含光出射 的法線方向且沿考第1透鏡列4如的延伸方向的剖面 的形^中’魏定為高度隨著㈣光體4的巾央遠離各光 入射端面41而增加的區域。同樣地，凸狀構造的第2區域 38 201124778 於包含光㈣® 43的树方向且 伸方向的剖面的形狀中，被 1透鏡列44a的延 中央遠離各光域端面41 導光體4的 2區域的平均傾斜角較佳為7度以3下。欠的區域。此處，第 斜角較佳為42.2度以上。'又，第1區域的傾 第2不同點在於： 種變f匕狀構造具有下述（Α，）〜⑼的變化中的至少- 面41 面41 (A^變化’隨著料规4的_料離各光入射端 ，透鏡列的延伸方向的平均間隔變短； (B’）變化’隨著朝導光體4的中央遠離各光入射端 ’透鏡列的延伸方向的長度變長； 遠離各光入射端 (C’）變化，隨著朝導光體4的中央 面41，高度變高； ' (D)變化，隨著朝導光體4的中央遠離各光入射端 面41 ’第2區域的平均傾斜角變大。 可使用本實施形態的兩端入射型的導光體來構成與圖 8所示的影像顯示裝置相同的影像顯示裝置。此種影像顯 示裝置包括使用有兩端入射型的導光體的上述面光源裝 置、以及藉由該面光源裝置來照明的顯示面板。 尤其作為使用兩端入射型的導光體而構成的影像顯示 袭置，例示了如下所示的多晝面顯示裝置以及立體影像顯 示裝置。 (多畫面顯示裝置） 39 201124778 圖10表示多畫面顯示裝置的一個實施形態的概略構 成圖。於圖10中’表示有使用上述兩端入射型的導光體而 構成的面光源裝置的第1 一次光源21以及第2 —次光源 22。 面光源裝置包括：兩端入射型的導光體；棱鏡片，鄰 接於上述導光體的光出射面而配置，且於與導光體的光出 射面相向的入光面形成有多個稜鏡列，該多個種鏡列大致 沿者與光入射端面平行的方向延伸且彼此大致平行地排 列；以及上述第1 一次光源21及上述第2 —次光源22。 第1 一次光源21以及上述第2 —次光源22可包含與分別 相向的兩端入射型的導光體的光入射端面相鄰接地配置的 多個LED。 與面光源裝置的稜鏡片的入光面的相反側的出光面相 鄰接地配置有透射型液晶顯示面板7'。該透射型液晶顯示 面板刃的顯示晝面中，接近於第1 一次光源21的一侧的半 個顯示畫面設為第1顯示畫面區域71·，接近於第2 —次光 源22的一側的半個顯示畫面設為第2顯示晝面區域72,。 多晝面顯示裝置包括同步驅動單元100。兩個晝面影 像信號自外部輸入至該同步驅動單元100。同步驅動單元 100與第1 一次光源21的點燈同步地使第1影像1-1顯示 於透射型液晶顯示面板7’的第1顯示畫面區域71，。又，同 步驅動單元100與第2 —次光源22的點燈同步地使第2 影像1-2顯示於透射型顯示面板7'的第2顯示晝面區域 72’。藉此’可顯示兩個晝面。 201124778 (立體影像顯示裝置） 圖11表示立體影像顯示裝置的一個實施形態的概略 構成圖。於圖11中，表示有使用上述兩端入射型的導光體 而構成的面光源裝置的第1 一次光源21以及第2 —次光源 22。 ' 面光源裝置包括：兩端入射型的導光體；稜鏡片，鄰 接於該導光體的光出射面而配置，且於與導光體的光出射 面相向的入光面形成有多個稜鏡列，該多個稜鏡列大致沿 著與光入射端面平行的方向延伸且彼此大致平行地排列； 以及上述第1 一次光源21及上述第2 —次光源22。第1 一次光源21以及上述第2 —次光源22可包含與分別相向 的兩端入射型的導光體的光入射端面相鄰接地配置的多個 LED。 與面光源裝置的棱鏡片的入光面的相反側的出光面相 鄰接地配置有透射型液晶顯示面板7,。 立體影像顯示裝置包括同步驅動單元100。立體影像 信號自外部輸入至該同步驅動單元100。同步驅動單元 與第1 一次光源21的點燈同步地使作為第1視野影像的左 眼視野影像I-L顯示於透射型液晶顯示面板7’的顯示晝面 [將該顯示稱為第1視野影像顯示]。又，同步驅動單元1〇〇 與第2 —次光源22的點燈同步地使作為第2視野影像的右 眼視野影像I-R顯示於透射型顯示面板7’的顯示晝面[將該 顯示稱為第2視野影像顯示]。同步驅動單元1〇〇可交替地 進行如上所述的第1視野影像顯示與第2視野影像顯示。 41 201124778 藉此’可顯示立體影像。亦即，於該情形時，以使自第l 一次光源21導入至導光體且自該導光體射出的光經過稜 鏡片之後的出射光分布的指向性、以及自第2 —次光源22 導入至導光體且自該導光體射出的光經過稜鏡片之後的出 射光分布的指向性’大致改變與人的兩眼的視差相當的角 度的方式’預先對導光體以及棱鏡片的光學特性進行設 定’藉此，即便不佩戴選擇性地使第1視野影像及第2視 野影像入射至各個眼睛的眼鏡，亦可實現立體觀察。 於本貫施形態中，導光體可以與透鏡列的延伸方向及 光出射面法線方向均正交的方向（光出射面與光入射端面 的邊界線的方向：圖11中的上下方向）為中心而彎曲。於 該情形時，稜鏡片以及顯示面板亦同樣地彎曲。使用此種 彎曲導光體的形態具有如下的優點，例如當用作電子看板 [Digital Signage]時，可使新穎性提高或可使設計與設置 所相匹配。 【實例】 以下，藉由實例以及比較例來對本發明進行說明。 再者，_以下的方法來對實例及比較例中所獲得的 衫像顯示裝置的性能進行評價。 <白點> 次光源點燈’自出射面側藉由目 施部周邊的部分進行判斷。判定 使影像顯示裝置的一 視來對相當於按壓試驗實 如下： :未能夠看到由導光體或光反射元件的劃痕等引起 42 201124778 的異常發光所導致的亮度不均（外觀不良）； X :可看到由導光贱光反射元件_痕等引起的異 常發光所導致的亮度不均（外觀不良）。 <黏附> 、使影像顯示裝置的-次光源點燈，自出射面側藉由目 視來對有效顯示區域内進行判斷。判定如下： 〇:未能夠看到由導光體與光反射元件的光接引 起的光學不良； X :可看到由導光體與統射元件的光學密接引起的 光學不良。 <亮度> 使影像顯示裝置的一次光源點燈，使用亮度計 (TOPCON公⑽造的BM·7)來射彡像顯林置的有效 顯示區域中的法線方向的亮度進行測定。此時，於如圖12 所示的鋸齒型態配置的13個點的位置（圖中由〇標記所示） ，進行測定[圖12中的數字「10」表示尺寸為1〇mm]，將 冗度的平均值分為下述的5個階段。 (於導光體具有一個光入射端面的情形時）：實例 實例8、比較例1〜比較例2 ◎ : 430 cd/m2 以上； 〇+ : 400 cd/m2 以上且不足 430 cd/m2 ; 〇 : 350 cd/m2 以上且不足 4〇〇 Cd/m2 ; △ : 250 cd/m2 以上且不足 350 cd/m2 ; X :不足 250 cd/m2 ; 43 201124778 (於導光體具有兩個光入射端面的情形時）：實例9〜 實例10、比較例3 ◎ : 570 cd/m2 以上； 〇+ . 530 cd/m2 以上且不足 570 cd/m2 ; 0 . 460 cd/m2 以上且不足 530 cd/m2 ; △ : 330 cd/m2 以上且不足 460 cd/m2 ; X :不足 330 cd/m2。 <均齊度> 使影像顯示裝置的一次光源點燈，使用亮度計 (TOPCON公司製造的BM-7)來對影像顯示裝置的有效 顯示區域中的法線方向的亮度進行測定。此時，於如圖12 所示的鋸齒型態配置的13個點的位置（圖中由〇枵印所干） 最小亮度/最大亮度為60%以上判定為〇，將最小亮度/最大 亮度不足60%判定為X。 配置起因的亮度不均（HotSpot) > 使影像顯示裝置的一次光源點燈，自出射面侧藉由目 視來對有效顯示區域内進行判斷，尤其對光源附近的區域 進行判斷。判定如下： 〇.未能夠看到由LED的配置引起的亮度不均； △.大致未能夠看到由LED的配置引起的亮度不均。 [實例1] 對加工面經過鏡面加工的有效部為189 mm(x方向尺 寸）χ292 mm (Y方向尺寸）、厚度為3〇 mm的鍍Nip塊 44 201124778 具素材)的加工面進行切削加工，以形成用 2所示的第2透鏡列43b的轉印區域，從 ^卩面械模具（成利模具構件）。再者，所 二二丄』模具内的固定範圍的用以將形狀轉印至成 二二心* 2透鏡列43b在與該第2透鏡列的延 t方向正交的面内，呈寬度為7Q_( 向尺寸）、曲率半徑為的圓弧形狀。 塊=的轉：區域具有與上述圓弧形狀相對應的反轉形狀。 刀削二工長度（X方向尺寸）於有效部内設為3 mm，以不 使切削加卫部分進人至導光體4的有效顯示區域卜 對加工面經過鏡面加工的有效部為⑽麵(χ方向尺 寸）X292麵（Y方向尺寸）、厚度為3 _的另外的鍍 >塊體（成形用模具素材）的加工面進行切削加工，以 形成用以轉印形成如圖2所示的第i透鏡列糾及凸狀構 造45的轉印面。第1透鏡列44a在與第1透鏡列44a的延 伸方向正交的面内，呈寬度為9〇 μιη(γ*向尺寸）、高产 為9Km(Z方向尺寸）、曲率半徑為117卿的大致圓弧$ 狀。切削加工長度（Χ方向尺寸）設為189咖。又，對盥 第1透鏡列44a的頂部相對應的部位進行切削加工，以形 成用以轉印形成凸狀構造45的轉印區域。設置於第1透鏡 列44a的前端部分的凸狀構造45的高度為4μιη，長度（= 方向尺寸）為135 μπι，前端部分的曲率半徑尺為16 ， 寬度（Υ方向尺寸）為21 μπι，且採用如下的構成，即， 沿著第1透鏡列44a的延伸方向，高度遞增，然後高度遞 45 201124778 減。具體而言，第1區域45a的平均傾斜角為3.39度，第 2區域45b的平均傾斜角為3.39度。又，凸狀構造45的 間隔於第1透鏡列44a的延伸方向上設為180 μιη，且於與 第1透鏡列44a的延伸方向成直角的方向上設為90 μιη。 藉此’包括相鄰接的第1透鏡列44a在内，任意的凸狀構 造與鄰接於該凸狀構造而存在的凸狀構造的距離各不相 同。具體而言，於光反射面44上，存在於以任意的凸狀構 造45為中心且具有該凸狀構造的高度的ι〇〇倍的半徑的圓 的範圍内的其他凸狀構造45的數量為26個〜34個。又， 塊體的轉印區域具有與上述凸狀構造相對應的反轉形狀。 再者’藉由切削加工來形成用於第1透鏡列44a的轉 印構造之後，在進行形成用於凸狀構造45的轉印構造的切 削加工之前’以玻璃珠（P〇tters Ballotini公司製造的j4〇〇 ) 來對塊體的加工面進行噴擊處理。於喷擊處理中，以34 g/ 分鐘的量’自200 mm的高度，以1 5 mm的間距自接近於 光入射端面的一側朝遠離該光入射端面的一侧呈帶狀地多 次噴射出玻璃珠’針對各個帶，使速度以及壓力分別自2〇 m/分鐘變化至4 m/分鐘以及自〇 2 MPa變化至〇 4 MPa， 藉此來形成平均傾斜角0a為〇 7度〜2 〇度的漸變 (gradation) ° 以如上所述的方式獲得第2轉印面形成模具（成形用 模具構件）。 46 201124778 將上述第1轉印面形成模具以及第2轉印面形成模具 裝入至射th絲I置，進行射&成形。使用㈣酸樹脂 (Mitsubishi ray〇n 公司製造的 ACRYpET TF 8)作 為成形材料。將所獲得的成形品即導光體4的模式性部分 剖面圖表不於圖4中。 接著，為了產生白點，將導光體以反射面朝上的方式 而配置於空出有邊長為8 cm的正方形的孔的台上，然後將 尺寸與導光體相同的的光反射元件（TORAY公司製造的 E6SR)放置於上述導光體上’進行次按塵試驗，該 按壓試驗是以20 mm(p的壓頭（前端橡膠：W2 _χΕ)5 mmxH2.5mm)自該光反射元件的上方來對正方形的孔的 中央部進行擠壓’直至施加最大壓力〇.02 kN為止。 使用按壓試驗之後的導光體以及光反射元件，與導光 體的厚度為〇·7 mm的長邊側端面（光入射端面41 )相向 地，沿著該長邊而以等間隔來配置54個LED (豐田合成 公司製造的E1S62-YWOS7-07)，然後配置反射器1〇。又， 與導光體的光出射面43相向地，以透鏡列形成面與光出射 面43相向的方式，配置由多個頂角為65。、間距為29 μιη 的透鏡列並排而形成的厚度為155 μιη的稜鏡片 (MITSUBISHI RAYON 公司製造的 Ml68YTC3)作為光 偏轉元件6，製作如圖1以及圖2所示的面光源裝置。 該面光源裝置與經組合的透射型液晶顯示元件的有效 顯示區域之間的關係為：有效顯示區域F的外緣處於與 47 201124778 導光體外周緣相距52 mm的位置。 與上述面光源裝置的光出射面相向地配置透射型液晶 顯π件？，從而製作影像顯示裝置。 能％^獲㈣影像顯示裝置的—次絲點燈，對發光狀 =订觀察時’並未看到由LED的配置引起的亮度不均， 儿Ί及均齊度亦良好’而且未看到白點或黏附等的缺陷。 [貫例2] 第1透鏡列44&的前端部分的凸狀構造45 ur^MT @ 1透鏡列4如的延伸方向上，在180 μιη〜360 同機地發生變動，除此以外，讀實例1相 、製作f彡像顯不裝置，並對發光狀態進行觀察。 :者:於光反射面44上，存在於以任意的凸狀構造衫為 ^甘具有該凸狀構造的高度的勘倍的半徑的圓的範圍 、八他凸狀構造45的數量為1〇個〜34個。其結果示於 表1 〇 [實例3] 读倍1轉印面形成模具上加工出用以轉印形成第2 ㈣制I的轉印區域’除此以外’以與實例1相同的方 一 ^作影像騎裝置’朗發練驗行觀察。其結果 不於表1。 [實例4] 對第1轉印面形成模具進行切削加工，以與實例i相 冋的方式形成用以轉印形成第2透鏡列43b的轉印區域， 利用玻璃珠（Pern⑽蘭細公㈣造的厕）來進行嘴 48 201124778 擊處理，從而形成第1轉印面形成模具。再者， 理中，以34 g/分鐘的量，自2〇〇 mm的高度，以;噴擊處 的間距自接近於光入射端面的一側朝遠離該光入』mrn -側呈帶狀地多次嘴射出玻璃珠，針對各個帶走=的 及壓力分別自20 m/分鐘變化至4 m/分鐘以及自〇=又以 變化至0.4 MPa ’藉此來形成平均傾斜角％為〇 7声 度的漸變。對第2轉印面形成模具的平面狀轉印面 面加工之後，進行切削加卫，以形成用以轉印形成^ 造45的轉印面。除此以外，以與實例丨相同的方法= 影像顯示裝置，並對發光狀態進行觀察。其結果示於表 對第i轉印面形成模具的整個面進行切削加工，以开; 成用以轉印形成第2透鏡列43b的轉印區域，除此以外， 以與實例4相_方法來製作影_示裝置 態進行觀察。其結果示於表i。 毛九狀 [實例6] ▲對於第2轉印面形成模具的設置於第ι透鏡列糾的 則端的凸狀構造45’第1區域45,平均傾斜角為45度， 第2區域45b的平均傾斜角為15度，長度為157陣，除 此以外’以與貫例1相同的方法來製作影像顯示裝置，並 對發光狀態進行觀察。其結果示於表i。 [實例7] 使第2轉印面形成模具的設置於第丄透鏡列恤的前 49 201124778 端的凸狀構造45的平均間隔於第丨透鏡列4乜的延伸方向 上’隨者遠離上述光入射端面而自3〇〇 μιη縮短至〗5〇 μιη， 且不以玻璃珠來對所獲得的塊體的加工面進行喷擊處理， 除此以外，以與實例1相同的方法來製作影像顯示裝置， 並對發光狀態進行觀察。再者，於光反射面44上，存在於 以任意的凸狀構造45為中心且具有該凸狀構造的高度的 100倍的半徑的圓的範圍内的其他凸狀構造45的數量為14 個〜40個》其結果示於表1。 [實例8] 使第2轉印面形成模具的設置於第工透鏡列44a的前 端的凸狀構造45的高度於第1透鏡列44a的延伸方向上， 隨者遠離上述光入射端面’在3.5 μιη〜6.6 μιη的範圍内升 高，同樣地亦使凸狀構造45的長度（X方向尺寸）與寬度 (γ方向尺寸）隨著遠離上述光入射端面，分別在88 μιη 〜166 μιη、20 μιη〜26 μιη的範圍内增長。此時，第i區域 45a以及第2區域45b的平均傾斜角保持固定為4 57度。 結果，凸狀構造45的第1區域的長度以及第2區域的長度 自44 μιη變動至83 μιη。不以玻璃珠來對所獲得的塊體的 加工面進行喷擊處理。除此以外，以與實例丨相同的方法 來製作影像顯示裝置，並對發光狀態進行觀察。其結果示 於表1。 [比較例1] 於第1透鏡列44a的前端未設置凸狀構造45，除此以 外，以與實例1相同的方法來製作影像顯示裝置，並對發 50 201124778 光狀態進行觀察。結果，於影像顯示裝置的額緣部分周邊 看到了白點或黏附等的缺陷。 [比較例2] 設置於第1透鏡列44a的前端的凸狀構造45的間隔於 第1透鏡列44a的延伸方向上設為810 μιη，且於與第1透 鏡列44a的延伸方向成直角的方向上設為810 μυι，除此以 外，以與實例1相同的方法來製作影像顯示裝置，並對發 光狀態進行觀察。再者，於光反射面44上，存在於以任意 的凸狀構造45為中心且具有該凸狀構造的高度的1〇〇倍的 半徑的圓的範圍内的其他凸狀構造45的數量為〇個。結 果，於影像顯示裝置的額緣部分周邊看到了白點或黏附等 的缺陷。 [實例9] 對加工面經過鏡面加工的有效部為414mm(x方向尺 寸）x238 mm (Y方向尺寸）、厚度為4〇 mm的鍍Nip塊 體的加工面進行鏡面切削加工，從而形成第丨轉印面形成 模具。 對加工面經過鏡面加工的有效部為414mm(x方向尺 寸）x238 mm (Y方向尺寸）、厚度為3 mm的另外的鍍 ΝιΡ塊體的加工面進行切削加工，以形成用以轉印形成如 圖2所示的透鏡列44a及凸狀構造45的轉印面。透鏡列 44a在與透鏡列44a的延伸方向正交的面内，呈寬度為9〇 μιη ( Y方向尺寸）、向度為9 (z方向尺寸）、曲率半徑 為117 μιη的大致圓弧形狀。又，對與透鏡列4乜的頂部相 201124778 對應的部位進行切削加工，以形成用以轉印形成凸狀構造 45的轉印區域。設置於透鏡列44a的前端部分的凸狀構造 45的高度為5 μιη ’長度為135 μπι，前端部分的曲率半徑 R為16 μιη ’寬度為23 μιη，且採用如下的構成，即，沿 著透鏡列44a的延伸方向，高度遞增，然後高度遞減。具 體而言’第1區域45a的平均傾斜角為4.27度，第2區域 45b的平均傾斜角為4.27度。 又’凸狀構造45的間隔於透鏡列44a的延伸方向上設 為170 μηι，且於與透鏡列44a的延伸方向成直角的方向上 設為90 μιη。藉此，包括相鄰接的透鏡列44a在内，任意 的凸狀構造與鄰接於該凸狀構造而存在的凸狀構造的距離 各不相同’從而形成第2轉印面形成模具。具體而言，於 光反射面44上，存在於以任意的凸狀構造45為中心且具 有該凸狀構造的高度的1〇〇倍的半徑的圓的範圍内的其他 凸狀構造45的數量為44個〜54個。又，塊體的轉印區域 具有與上述凸狀構造相對應的反轉形狀。 將上述第1轉印面形成模具以及第2轉印面形成模具 裝入至射出成形裝置，進行射出成形。使用丙烯酸樹脂 (MITSUBISHI RAYON 公司製造的 ACRYPET TF-8)作 為成形材料。 接著，為了產生白點，將導光體以光反射面朝上的方 式而配置於空出有邊長為8 cm的正方形的孔的台上，然後 將尺寸與導光體相同的的光反射元件（TORAY公司製造 的E6SR)放置於上述導光體上，進行次按壓試驗， 52 201124778 該按壓試驗是以20 ππηφ的壓頭（前端橡膠：W2 mmxD5 mmxH2.5 mm)自該光反射元件的上方來對正方形的孔的 中央部進行擠壓，直至施加最大壓力〇 〇2 kN為止。 使用按壓試驗之後的導光體以及光反射元件，與導光 體的尽度為0.7 mm的兩個短邊侧端面（光入射端面41 ) 相向地，沿著該短邊而以等間隔來於單邊配置36個（兩邊 合計72個）LED (豐田合成公司製造的 E1S62-YWOS7-07) ’然後配置反射器1〇。又，與導光體的 光出射面43相向地，以透鏡列形成面與光出射面43相向 的方式，配置由多個頂角為65。、間距為29 μπι的透鏡列 並排而形成的厚度為155 μιη的稜鏡片（mitsubishi RAYON公司製造的M165htc3)作為光偏轉元件6，製作 如圖9所示的面光源裝置。 與上述面光源裝置的光出射面相向地配置透射型液晶 顯示元件7’，從而製作影像顯示裝置。 使所獲得的影像顯示裝置點燈，對發光狀態進行觀 察。其結果示於表1。 [實例10] 設置於透鏡列44a的前端部的凸狀構造45的高度設為 5.2 μπι，隨著朝導光體的中央遠離光入射端面41，使凸狀 構造45的第1區域的平均傾斜角自5度漸變至屯5度，使 凸狀構造45的第2區域的平均傾斜角自4度漸變至4 5 度’且隨著朝導光體的中央遠離光人射端面41，使凸狀構 造45的第1區域的長度自59.4 μιη漸變至66.1 μιη，使凸 53 201124778 狀構造45的第2區域的長度自74.4 μιη漸變至66.1 μιη， 存在於以任意的凸狀構造45為中心且具有該凸狀構造的 高度的100倍的半徑的圓的範圍内的其他凸狀構造45的數 量設為50個〜60個，除此以外，以與實例9相同的方法 來製作面光源裝置，使所獲得的面光源裝置點燈，並對發 光狀態進行觀察。其結果示於表1。 [比較例3] 於第1透鏡列44a的前端未設置凸狀構造45，除此以 外，以與實例9相同的方法來製作影像顯示裝置，並對發 光狀態進行觀察。結果，於影像顯示裝置的額緣部分周邊 看到了白點或黏附等的缺陷。 將以上的實例以及比較例中的導光體的詳情以及影像 顯示裝置的評價結果集中地表示於以下的表1中。 54 201124778 J-a66fN9rn <】 比較例3 1 1 1 I 1 I 1 1 1 1 實例10 (N 50 〜60 59.4-^66.1 yn Τ Ο ν*ί 74.4—66.1 4.0—4.5 CO (Ν Ο 實例9 44 〜54 τί- VO A v〇 ΓΛ (Ν Ο § 比較例2 寸 〇 yn !〇 OS m rn in vo Os ΓΟ rn VO CS ο oo Ο OO 比較例1 1 1 1 1 1 1 1 1 1 1 實例8 VO \6 T ΓΛ 26-34 00 τ 5 m 00 T 5 卜 wn '«t \〇 20—26 g g 實例7 寸 14〜40 i Os m c〇 On m rn CN 300—150 實例6 寸 26-34 寸 m <n ν-ϊ cs g § 實例5 寸 26 〜34 ίο On m rn in ON m cn v〇 (N g 實例4 寸 26 〜34 ίο Os m rn in VO as m ro v〇 <S g 實例3 寸 26 〜34 ιη δ On cn cn ίο 〇\ m CO Ό cs g 冢 實例2 寸 10〜34 5〇 〇\ m cn v〇 v〇 Os cn (N 180^360 寸 CN ιη ίο Os CO in v〇 ON cn cn g g 凸狀構造的高度 [μη] ^ <1 〇 ^ ^ 〇 14c ^ ^ -s s 靶C喇 W趔雉 第1區域45a的 長度[μηι] S n Cd ^ l〇 >—1 寸叹 tel)裳 -踅 第2區域45b的 長度[μηι] 忘鬥 m 1»—1 til擎 (N踅 城屮 前端的曲率半徑 [μιη] 寬度[μηι] i第1透鏡列的延 k申方向的間隔 [μπι] ____ 破®:痤 S Ή £5； ^ -S： ^ =0羔垅雉 15^ 茶 V0 vs單vs舉 喵學铜电學iMvsp珈VB學 珈衾 M «學珈 电厚 0域 201124778(Α) change, the average interval in the extending direction becomes shorter as it goes away from the light incident end face; ^ J (B) varies, and the length of the extending direction of the lens column becomes longer as it goes away from the light human end face; (C) The change is returned to the light incident end face, and the height becomes high; (D) The change, the average tilt angle of the above-mentioned ^ region becomes larger as it goes away from the light incident end face. In this case, the generation of interference fringes or the like particularly between the periods of the members such as the light reflecting element is suppressed. In one aspect of the invention, the light guide body includes two light human incident end faces that are located on opposite sides of each other. The primary light source includes a light incident end surface adjacent to one of the two light incident end faces. The second secondary source and the second-order light source disposed adjacent to the other of the two light incident end faces. In one aspect of the present invention, the convex structure is included in a cross-sectional shape including a normal direction of the light-emitting surface of the light 201124778 and extending along the lens row, and includes a first region and a height The center of the light guide body is increased away from the light incident end surface; and the second region has a height that decreases or decreases toward the center of the light guide body away from the light incident end surface, and the average tilt angle of the second region is Below 7 degrees. In this case, in particular, due to the convex structure, the light-emitting characteristics of the light guide body are not greatly changed. Therefore, it is possible to prevent the occurrence of optical defects and to provide a uniform and bright image display device. In one aspect of the invention, the convex structure is in a shape including a cross section of the normal direction of the light exit surface and extending along a direction in which the lens array extends, and the inclination angle of the first region is 42 2 Above the degree. In this case, especially the light transmitted inside the light guide body does not reach the contact point of the light guide body and the member such as the light reflection element, and the contact point of the member such as the light reflection element is not damaged even if it is damaged. Since it is self-pointing, it is possible to prevent the occurrence of optical defects more effectively. In one aspect of the invention, the convex structure has at least one of the following changes (Α') to (D'): (Α') changes, as the light is moved away from the center of the light guide The incident end surface 'the average interval in the extending direction of the lens array is shortened; (Β·) changes, and the length in the extending direction of the lens array becomes longer as the center of the light guiding body is away from the light incident end surface; (c' The change becomes higher as the center of the light guide body is away from the light incident end surface, and the height becomes higher; (D') changes, and the second region is moved away from the center of the light guide body by the light entrance 15 201124778 end face. The average tilt angle becomes larger. In this case, the generation of interference fringes or the like between the periodic structure of the member such as the light reflecting member or the like is suppressed. In one aspect of the invention, the image display device further includes a synchronization driving unit that displays the first image on the transmissive display panel in synchronization with the lighting of the third primary light source. In the surface area, the second image is displayed on the second display screen area of the transmissive display panel in synchronization with the lighting of the second-order light source. In one aspect of the present invention, the image display device further includes a synchronous driving unit that alternately displays the first visual field image and the second visual field image, wherein the second visual field image display is synchronized with the lighting of the second primary light source The first view (four) is displayed on the transmissive display panel, and the display displays the second field of view on the transmissive display panel in synchronization with the lighting of the second primary light source. In one aspect of the invention, the light guide body is bent concentrically with the extending direction and the normal direction of the upper wire exit surface. According to the image display device of the present invention, the contact area of the member such as the light-light reflecting light 7L of the light guide body can be reduced, and the occurrence of the self-pointing or the like caused by the thinning can be prevented. The defect t' can provide an image display device using a surface light source device of a thin type, high brightness, high brightness uniformity, and high mouth quality. [Embodiment] Hereinafter, an embodiment 201124778 of the present invention will be described with reference to the drawings. Fig. 1 is a schematic perspective view showing an embodiment of a surface light source device used in the present invention, and Fig. 2 is a schematic exploded perspective view showing a portion of the surface light source device in the vicinity of a primary light source. As shown in FIG. 1, the surface light source device of the present embodiment includes a light guide 4, and at least one side end surface is a light incident end surface 41, and one surface substantially perpendicular to the side end surface is defined as a light exit surface 43. The secondary light source 2 is disposed adjacent to and adjacent to the light incident end surface 41 of the light guide 4, and is covered by a reflector 1; the light deflection element 6 faces the light exit surface of the light guide 4. The light reflecting elements 8 ′ are disposed adjacent to each other and adjacent to the light reflecting surface 44 on the opposite side of the light emitting surface 43 of the light guide 4 . As the primary light source 2, a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp (CCFL)) may be used, or a light source in which a point light source (Light Emitting Diode (LED)) is arranged may be used. . From the viewpoint of reducing the thickness and power saving of the surface light source device, it is preferable to use a light source in which a plurality of point light sources such as led are arranged as the primary light source 2, and in the following description, a light source as follows is used. An example of a secondary light source in which a plurality of LEDs are arranged as a secondary light source will be described. Preferably, the plurality of LEDs are arranged such that the directions of the maximum intensity light of the light emitted from the plurality of coffees are parallel to each other. The direction of the maximum intensity light of the light emitted from the LED can be set, for example, in the direction. °... (light guide), the light guide 4 is disposed in parallel with the pupil plane, and the entire rectangular plate light guide body 4 includes four side end faces, and the four side end faces are parallel to the face size 17 201124778 One of the pair of side end faces is a light incident end face 41, and a led is disposed adjacent to the light incident end face. The other one of the pair of side end faces of the light guide 4 which is substantially parallel to the YZ plane is provided on the opposite end face 42 opposite to the light incident end face. The two main faces of the light guide 4 that are substantially perpendicular to the light incident end face 41 are disposed substantially orthogonal to the z direction, and the upper surface of one of the principal faces is defined as the light exit face 43. (Configuration of Light Exiting Surface of Light Guide Body) As shown in FIG. 2, the light exit surface 43 may include a region including a rough surface 43a having a fine uneven structure as a light emission control function structure, and/or a plurality of regions The area of the lens row (second lens row) 43b. That is, the light exit surface 43 includes a rough surface 43a and/or a second lens array 43b. Preferably, the second lens array 43b extends substantially in the X direction and is substantially parallel to each other, and the X direction is the maximum intensity light of the light emitted from the primary light source 2 (LED) and introduced into the light guide 4 The directivity of the maximum intensity light incident on the light guide light incident end surface 41 and introduced into the light guide 4 in the direction along the plane of the light exit surface 43 (ie, in the plane along the light exit surface 43) Direction). In other words, it is preferable that the respective lenses of the second lens array 43b that are arranged substantially parallel to each other extend in a direction substantially perpendicular to the direction perpendicular to the boundary between the light exit surface 43 and the light incident end surface 41, that is, the X direction. form. In addition, the "light emitting surface 43" in the "border of the light exit surface 43 and the light incident end surface 41" herein refers to a light emitting surface that does not include the shapes of the rough surface 43a and the lens array 43b, specifically The "light exit surface 43" is parallel to the XY plane. That is, "the boundary between the light exit surface 43 and the light incident end surface 41" extends substantially in the γ direction. In the present invention, the above-described form of 18 201124778 is defined as "the lens row 43b extends substantially in a direction perpendicular to the light incident end face 41". In the second lens array 43b, the shape of the cross section orthogonal to the extending direction of the second lens array 43b can be an arc shape, a V shape, or a V shape with an R shape at the tip end, depending on the arrangement interval of the LEDs. The desired shape of shape, sine curve, parabolic shape, and lenticular lens shape. The second lens array 43b has a function of regularly controlling the direction of the light passing therethrough or the light reflected thereon, and the second lens array 43b has a function of diffusing light emitted from the dot-shaped primary light source. Therefore, the cross-sectional shape is preferably a circular arc shape having a plurality of angular components or a V-shaped front end having an R shape. In the cross section, when the arc shape or the V subshape having the R shape at the tip end is used as the shape of the second lens array 43b, the radius of curvature of the second lens array 43b is, for example, 5 μm to 200 μm, preferably 7 pm. ~120pm, more preferably 10 μιη~50 μηι. Further, the pitch of the second lens array 43b is, for example, 1 〇, preferably 1 〇 μηη to 15 〇 μηη, more preferably 20 μηι 〜1 〇〇 μιη, as long as it is combined with the above-mentioned radius of curvature to obtain a desired pitch. The shape can be. Further, in the case of any one of the shapes, the surface of the second lens array 43b, that is, the lens surface (also referred to as the "bevel" of the lens row) constituting the lens array may be roughened. The rough surface has a function of diffusing light at random. By roughening the bevel of the lens array, the functions of the two can be mixed to more effectively eliminate uneven brightness. According to the difference in the degree of roughening of the lens row, the effect of the regular direction control function 201124778 The proportion of the effect of the random diffusion function changes, but the degree of roughening of the slope is based on the slope The average tilt angle of the surface described later is preferably 0. 1 degree to 10 degrees, more preferably 0. 5 degrees to 3 degrees. If the average tilt angle is 0. When the angle is 5 degrees or more, the diffusion effect by the rough surface can be sufficiently obtained, and if the average inclination angle is 3 degrees or less, the regular direction control effect of the lens array can be sufficiently obtained. The region on the light exit surface 43 where the second lens array 43b is formed is a region close to the light incident end surface or the entire light incident end surface. The region close to the light incident end surface may be a strip-shaped region extending along the edge of the light exit surface 43 adjacent to the light incident end surface 41. The region in which the second lens array 43b is formed is not particularly limited, and may be formed on the entire light exit surface, but is preferably located outside the effective display region F to be described later, that is, preferably located at the light incident end surface 41. The end edge of the adjacent light exit surface 43 (in other words, the boundary between the light exit surface 43 and the light human incident end surface 41) and the portion (incident side edge portion) sandwiched by the effective display region f. When the second lens column gamma is formed to protrude in the effective display region F, the boundary line between the region in which the second lens column is formed and the region other than the region may appear in the effective display region, thereby causing the brightness to be not observed. All. Further, it is difficult for the width of the strip-shaped region in which the second lens array is formed to be sufficiently large to obtain the above-described effects **, for example, preferably two or more times the thickness of the light guide. If the mirror is over; 1, ', sometimes it is not possible to fully obtain the above effects. It is possible to determine whether the second lens array is formed only in the region close to the light incident end surface 201124778 or the second lens depending on whether the influence of the luminance unevenness and the influence of the unevenness are within the allowable range. The columns are formed on the entire light exit surface. As shown in FIG. 1, when a display element such as a transmissive liquid crystal display element is disposed on a light-emitting surface of a surface light source device to form a display device such as a liquid crystal display device, the effective display region F is a surface light source: The way out is actually affixed to the light field (i.e., the area of the surface light source device corresponding to the effective display area of the display device) that is effectively displayed by the illumination reading display device. The effective display region F may be, for example, a region within the precursor light emitting surface 43 and a region within the light reflecting surface 44 of the light guide. In many cases, the turtle region F is a cell region having a diagonal length of about 1 mm to 5 mm with respect to the light-emitting region of the surface light source device. Further, the light exit surface 43 of the light guide body is from the edge of the light incident end surface 41 adjacent to the light guide body 4 to the effective display region 1 depending on the surface light source (4) shape (4) and the size ((4)), Generally it is ~10 mm or so. The region in which the second lens row 43b is formed on the light exit surface 43 may be partially present in the width direction of the incident side edge portion (that is, the X direction). However, in order to further the second lens column 43b The effect of the action is improved, and the width of the region is preferably 1/2 or more of the width of the edge portion of the incident side, and more preferably the entire width (i.e., full width) of the edge portion of the incident side. Furthermore, in the present invention, the first portion is formed on the light reflecting surface 44! When the lens array is arranged, the second lens array 43b may not be formed on the light exit surface 43. Further, a secret surface (10) having a fine concavo-convex structure may be formed in a region of the light exit surface 43 where the second lens array 43b is not provided. The light is emitted by the rough wheel 21 201124778 surface 43a, which is in the normal direction including the light exit surface 43 (Z direction) and the X direction orthogonal to the light incident end surface 41 in the X direction. There is directivity in the distribution within. The angle between the peak direction of the outgoing light distribution and the light exit surface is, for example, 1 〇. ~4〇. The half-height full width value of the outgoing light distribution is, for example, 10. ~40. . - According to IS04287/1-1984, the shape of the rough surface can be measured using a stylus type surface roughness meter, and the coordinate of the measurement direction is set to X, according to the obtained tilt function f (X) and the following formula (1) is used. And (2) Formula Δa= (1/L) J〇L | (d/dx) f (X) | dx· • (2) eaian·1 (△&) is determined to be formed in the light guide 4 The light exit surface 43 has an average tilting length of the city surface 43a having a fine uneven structure as a light emission control function structure, and Aa is the average tilting angle 0a of the positive slope = for the rough surface 43a. It is preferable that the luminance uniformity in the light exit surface 43 is a range in which the average tilt angle according to is 4287/M984 is again = (U degrees ~ H) degrees. A more preferable range of the average tilt angle 0a is u 2 degrees to 8 degrees, and a more preferable range is 〇 3 degrees to 5 degrees. (Structure of light-reflecting surface of light guide body) The light guide body used in the present invention is a guide type 4) secret type reading, and a schematic mode cross-sectional view (ΥΖ cross-sectional view), 5 is a schematic view showing a light reflecting surface of upper == 22 201124778, and Fig. 6 is a sectional view of a schematic N sectional view of Fig. 4). On the other hand, the configuration of the light reflecting surface 44 of the light guide 4 will be described with reference to Figs. 2 to 6'. The main surface opposite to the light-emitting surface of the light guide 4 (that is, the light-reflecting surface (4) is formed substantially in a direction substantially perpendicular to the light incident end surface 41 in a direction across the light incident end surface 41 (ie, a plurality of lens rows (first lens rows) 44a extending in parallel with each other along the direction of the directivity of the light incident on the light guide 4 in the plane of the light exit surface 43 (the X-direction) The light emitted from the exit surface 43 is controlled in directivity in the YZ plane parallel to the array direction of the LEDs. That is, the light reflecting surface 44 includes the first lens array 44a. The first lens arrays 44a are arranged substantially parallel to each other. The light is extended along the direction perpendicular to the boundary between the light reflecting surface 44 and the light incident end surface 41, that is, the X direction. Further, the "light reflecting surface 44" in the "border of the light reflecting surface 44 and the light incident end surface 41" herein. The term "' refers to a light reflecting surface that does not include the shape of the first lens array 44a. Specifically, the "light reflecting surface 44" is parallel to the XY plane. That is, the light reflecting surface 44 and the light incident end surface 41 are referred to herein. The boundary "extends substantially along the γ direction. It is preferred to use the front end In the present invention, it is preferable to use the following i-th lens row 44a, that is, a cross section orthogonal to the extending direction of the lens column 44a. In the shape of the first lens row, the ratio (P1/H1) of the arrangement pitch (P1) to the height (H1) of the first lens row 44a is 7 to 200, preferably 8 to 150, more preferably 1〇~1〇〇, the cross-sectional shape is an arc or the front end is a curve of 23 201124778. The reason is that the emission ratio from the light exit surface 43 can be sufficiently concentrated by setting the aspect ratio of the first lens array 44a to the above range. Light, and prevention of breakage or chipping of the lens array and generation of white spots caused by rubbing with the light reflecting element 8. That is, by making the shape of the first lens array 44a within the above range, the following The condensed outgoing light is emitted to increase the brightness of the surface light source device, and the condensed outgoing light is distributed on the surface perpendicular to the xz plane including the peak light direction in the outgoing light distribution. The full width at half maximum is 30 to 65. The arrangement of the first lens array 44a is between The distance P1 is, for example, 1 〇 pm to 2 〇〇, preferably μπι ΐ 5 〇 μηη, more preferably 20 μπι to 100 μϊη. Further, the cross-sectional shape of the front end portion of the first lens array 44a is preferably a curvature radius R. The circular arc shape of 25 μm to 3 μm is not particularly limited to the circular arc shape, and may be a shape similar to the arc shape, and the cross-sectional shape of the first lens array 44a. The portion other than the tip end portion may have a curved shape, and may be, for example, a wave shape represented by a sinusoid or the like. Further, when the second lens array 43b exists on the light exit surface 43, particularly when the light exit surface is present When the second lens array 43b is entirely present in the region of the majority of 43, the light reflecting surface 44 may include a mirror surface or an average tilt angle of (10) uneven surface. When the light exit surface 43 is not roughened surface 43a or the like, it is preferable that the light reflecting surface 44 is an uneven surface having an average tilt angle of 4 degrees or less. (the convex structure of the light guide light reflecting surface), as shown in FIG. 3, when the first lens row 44a exists on the light reflecting surface 44 of the light guiding body 4, the front end portion of the first lens row is transmitted (the highest The portion of position 24 201124778: the 'top' is 'scattered (dispersed) to form a plurality of convex structures 45. Fig. 4 shows a cross-sectional shape of the first lens array 44a in a plane parallel to the light incident end surface 41 (a cross section along the dotted line M in Fig. 3). Each of the convex structures 45 is formed such that the maximum height (i.e., the maximum height in the two directions) protruding from the front end portion of the first lens row is 2 μm or more. That is, the height of each of the convex structures 45 protruding from the light reflecting surface 44 is 2 μη or more. Further, the plurality of convex structures 45 are provided in the effective display region of the light reflecting surface (that is, in the inner surface), and have a protruding height of the convex structure 45 around the arbitrary convex structure 45. In addition to the convex structure 45 as the center, two or more convex structures 45 (see FIG. 5) are disposed in the range of the circle having a radius of 〇〇 (see R' in FIG. 5). In this way, a predetermined number of convex structures=squares exist in a predetermined range in the light reflecting surface 44, and the convex structure 45 is provided in the front end portion of the first lens row 44a, whereby the light guiding light can be provided. The contact area of the body 4 with the light reflecting element 8 is reduced. Therefore, it is possible to prevent the lens row of the entire light guide 4 from being damaged by the contact of the light guide 4 with the light reflecting member 8. As a result, the occurrence of optical defects such as white spots or adhesion can be prevented. When the protruding height of the convex structure 45 is less than two, it is difficult to prevent the tip end portion of the first lens array 44a from coming into contact with the light reflecting element 8, and there is a possibility that occurrence of white spots or adhesion may not be prevented. Further, the number of other convex structures 45 existing in a range of a circle having a half of the protrusion height of the convex structure 45 centered on the & configuration = 5 is less than 2 = by the convex structure 45 prevents the contact between the light reflecting element 8 and the end portion of the ith lens array ', so that it is impossible to prevent generation of light such as white spots or adhesion. From the viewpoint of sufficiently ensuring the effect of preventing contact, the lower limit of the number of the convex structures 45 is preferably 3 or more and more preferably 7 or more. Further, the limit value of the other convex structure 45 is not particularly limited, but the larger the number, the larger the contact area of the convex structure 45 盥 element 8 is, and as a result, there is a possibility that it is impossible to prevent/white spots or adhesion. The optical defect is generated. Therefore, the upper limit of the number of other convex structures 45 is preferably 300 or less, more preferably employed below, and more preferably (10) is less than 0 and the 'convex structure 45 is parallel to the light-emitting end face. The cross-sectional shape of the face is preferably a triangular shape or an arc shape in which the end is formed by a curved line. By providing such a shape, the chipping of the front end portion of the convex structure 45 can be prevented. Preferably, the radius of curvature R of the tip end of the convex structure 45 in the YZ cross section is set to i μm or more and 1 〇〇 or less, preferably 2 μm or more and % or less, more preferably 4 μm or more and 20 or more. Below μηι. When the curvature radius R of the tip end is too small, the transfer stability is not easily obtained, and the forming stability is likely to be poor. When the radius of curvature r of the tip end is too large, the effect of preventing the occurrence of optical defects such as white spots or adhesion is likely to be lowered. The convex structure 45 is liable to cause chromatic dispersion of the same magnitude as the wavelength of the light emitted from the X-ray source 2. If the dispersion is very large, the convex structure can be seen by the naked eye. . Therefore, the cross-sectional shape of the surface parallel to the light incident end surface is preferably such that the width (γ-direction dimension) 5 of the convex structure 45 is 3 μm or more and 7 5 μη or less, preferably 4 μm. The above is 50 μηη or less, more preferably 7 μιη or more and 30 μιη or less. FIG. 6 shows a cross-sectional shape of the first lens row correction convex structure 45 in the plane along the extending direction of the first lens row 44a (line 26 201124778 N of FIG. 4 ). The shape of the convex structure 45 can be appropriately selected, and the configuration including the i-th region 45a and the second region 45b along the extending direction of the first lens column 44a with the height away from the light incident end face 41 is exemplified. On the other hand, after the second region 45b is in the second region 45a, the height gradually decreases as it goes away from the light incident end surface. When the height of the second region 45b changes sharply, it is difficult to obtain a balance of brightness in the vicinity of the light incident end surface 41 of the light guide 4 and the opposite end surface 42, and it is sometimes difficult to provide uniform brightness. Face Yang device. Therefore, the average tilt angle of the second region is preferably set to 0. 5 degrees or more and 7 degrees or less. Further, the second region 45b may also include a flat region where the height does not change. This flat region is provided, for example, at a portion adjacent to the i-th region 45a. When the second region 45b includes a flat region, the average tilt angle of the second region 45b means an average tilt angle which also includes the flat region. The convex structure 45 causes a dispersion of the same magnitude as the wavelength of the light emitted from the primary light = 2, and if the dispersion is very large, the convex structure can be seen by the naked eye. Therefore, the length of the convex structure 45 along the extending direction of the second lens column is preferably between μιη and 250 μηη. Further, the 'convex structure 45 may be disposed at equal intervals along the first lens array 44a. However, by periodically providing the convex structure 45, the valley easily generates interference fringes with other optical members. Therefore, it is preferable to arrange the convex structure 45 at random in accordance with the prevention of the interference fringe. Further, not only the interval of the convex structure 45 can be randomly changed, but also the size of the convex structure 45 (the length dimension of the extending direction of the second lens row and the width dimension in the direction orthogonal to the extending direction of the lens row of the 27th 201124778 1) It can also be changed randomly, and the interval and size can be changed randomly. Moreover, the plurality of convex structures 45 may also vary randomly. In addition, even when the scent of the convex structure 45 fluctuates randomly, in the range of a circle having a radius of a radius of the height of the convex structure 45 centering on the arbitrary convex structure 45, 2 is disposed. More than one other convex structure 45 having a dimension of 2 μm or more (excluding the convex structure 45 as a center). In the case of forming a structure in which the height of the convex structure 45 is randomly changed, when manufacturing a mold for transferring a shape (phase # 用 用 / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / The vibration I is set in the diamond car, and the input __ signal (nGise signal) is input to the vibration, the device, and the diamond turning tool is randomly vibrated, and the mold is processed in order to obtain the figure (4). A shape that changes in depth randomly. The direction of the filament of the diamond car 77 may be set to only the direction corresponding to the Z direction and the direction of the upper direction of the two directions. When the length of the convex shape 45 along the extending direction of the first lens row 44a or the structure of the fourth (4) is formed, the feed rate of the diamond turning tool may be randomly generated. (4), processing. The method of generating the noise signal of = 使 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = From the required m (flltei·) to the interception of the noise of the basic waveform of the noise (four) or sm (four) obtained from 2011, 2011, and the pseudo-random waveform that is programmed to eliminate the periodicity. When the amplitude of the vibration (variation) of the height of the convex structure 45 is large, the occurrence of white spots or adhesion can be effectively reduced. However, as the amplitude becomes larger, there is a tendency that the 卩, 加, I tend to become unstable, and it is easy to cause appearance defects such as burrs, streaks, and wrinkles of the processed surface. As described above, in the case of the second work, the small amplitude is preferable. However, if the change I in the height of the convex structure 45 is less than ί%, the effect of reducing the adhesion or the white spot is reduced. Further, when the amount of change in the height of the convex structure 45 exceeds 8〇%, there is a tendency that appearance defects are likely to occur, and the surface light source device is also prone to glare. Therefore, the fluctuation of the height of the convex structure 45 preferably includes a range of more than 5% by weight and an average of 8% or less of the average height of the convex structure 45, and varies randomly in the range of 10% to 80%. FIG. 7 is a view showing a state of light reflection by the convex structure 45. As shown in Fig. 7, in the first region 45a of the convex structure 45, the cross-sectional shape along the extending direction of the first lens row 44a may have a steep angle. The light emitted from the primary light source 2 and introduced into the interior of the light guide 4 is reflected on the light exit surface 43 and the light reflecting surface 44 on the one hand, and is transmitted inside the light guide body on the one hand. The light that has reached the light exit surface 43 at an angle lower than a specific angle is reflected by the light exit surface 43 and is further transmitted inside the light guide body 4, and the light that reaches the light exit surface 43 at an angle higher than a specific angle is emitted from the light exit surface 43. 43 shot. Here, referring to FIG. 7 on the one hand, the light ray 80 is described on the one hand, and the ray 80 is as follows (3) 29 201124778 a=arcsin ( 1/n) . . . (3) The defined critical angle α is incident on the light exit surface 43 and then reflected, and then passes through the point A between the first region 45a and the tip end of the first lens array 44a. Here, η is the refractive index of the light guide 4 . Light 80 reaches point 2B at point D. Here, the most prominent point C of the convex structure 45 is located on the side closer to the light incident end surface 41 than the point D. In the light that is reflected and transmitted inside the light guide body, 'there is no light whose angle exceeds the critical angle. Therefore, of the light passing through the point A, the light reflected at the maximum angle with respect to the light exit surface 43 becomes the light ray 80. Therefore, by setting the point c to the side closer to the light incident end surface than the point E), the light transmitted inside the light guide 4 does not reach the point C. The light guide 4 configured as described above is in contact with a frame (not shown) disposed on the lower side of the light-reflecting element 8 or the surface light source at the point C. At this time, since the light guide 4 is in contact with other members, even if the point C is damaged, as described above, since the light transmitted inside the light guide 4 does not reach the point C', the former light guide can be prevented. As a result, scratches are treated as white point defects. More specifically, when the refractive index is 丨. When 46 propylene is used as the light guide 4, it is based on arcsin (1/1. 46), the critical angle α of the interface between the light guide 4 and the air having a refractive index of 1 is 42. 2 degrees, therefore, ^ is set by the angle of inclination of the first area 45a to 42. More than 2 degrees, it is possible to prevent the occurrence of optical defects such as white spots. The convex structure 45 preferably has at least one variation of the change of 30 201124778 in the following (A) to (d): (A) variation 'average of the extending direction of the first lens array 44a as it goes away from the light incident end surface 41 The interval is shortened; (B) the change 'the length of the extending direction of the first lens array 44a becomes longer as it goes away from the light incident end face 41; (C) the change 'the height becomes higher as it goes away from the light incident end face μ; (D) The change 'as the distance from the light incident end face 41, the average tilt angle of the second region 45b becomes larger. Thereby, the generation of interference fringes and the like with the periodic structure of other optical members is suppressed. Further, as the light-emitting function structure of the light guide 4, a lens row or a coarse wheel surface formed on the light-emitting surface 43 and/or the light-reflecting surface 44 as described above can be used in combination, and light-diffusing fine particles can be mixed therein. A structure formed by being dispersed into the inside of the light guide body 4. In addition, as the light guide body 4, the same thickness as shown in FIGS. 1 and 2 can be used (the fine uneven shape and the lens column shape of the rough surface of the light exit surface 43 and the lens column shape of the light reflection surface 44 are ignored). In addition to the plate-shaped light guide of the same thickness, a light guide body having various cross-sectional shapes such as a wedge-shaped light guide body whose thickness is gradually reduced from the light incident end surface 41 toward the opposite end surface 42 in the X direction may be used. . Further, the effective display region F of the light exit surface 43 of the light guide 4 may be a mirror surface, and the surface of the first lens row 44a of the light reflecting surface 44 may be a rough surface. In this case, in consideration of achieving the uniformity of the brightness in the light exit surface 43, it is preferable to use the slope of the i-th lens array 44a as a reference surface to make the first! The average tilt angle 0a of the surface of the lens column 44a is at 0. A range of 1 degree to 10 degrees. The average tilt angle ea 31 201124778 5 is better than the range of °. 2 degrees to 8 degrees' and thus a better range. . 3 degrees ~ the thickness of the light guide 4 is, for example, 0. 3 mm 〜1〇m 上 ^ mnj 〇 (manufacturing method of light guide body) Sexual tree shape = can be === when the required area of the mold material (also has the required target as the target ^ required The surface shape is treated as the coarse rim surface 43 as the blasting as described above, according to the sturdiness of the smear treatment, the smashing treatment towel, the squirting spray, and the stenciling It is preferred to maintain the solid state. It is possible to lie such as a ball-shaped particle in the shape of a ball or a particle of a shape like an alumina particle as a blasting particle. Also, as a desired surface as a target When the lens row is the same as the first lens array 44a or the second lens array 43b, a cutting process using a cutting tool such as a rock car turning tool can be used as the above-described process. When the shape is a convex structure such as a convex structure 45 provided at the tip end portion of the first lens array 44a, laser processing, cutting using a cutting tool such as a diamond turning tool, 32 201124778, or the like can be used. Various methods are used as the above-described processing. The light deflection element 6 is disposed on the light exit surface 43 of the light guide 4. The two main faces of the light deflection element 6 are substantially parallel to the χγ plane as a whole, and one of the two main faces is the main one. The surface (the main surface facing the light-emitting surface 43 of the light guide) is the light-incident surface 61, and the other main surface is the light-emitting surface 62. The light-emitting surface 62 is parallel to the light-emitting surface 43 of the light guide 4. a flat surface or a rough surface. The light incident surface 61 is arranged in parallel with each other The array of the entrance pupils 65 extends along the Y direction substantially parallel to the direction in which the LEDs are arranged, and is formed parallel to each other (ie, formed on the light incident surface ο) There are a plurality of arrays 65) arranged in parallel with each other along the light-injecting light incident end surface 41. The arrangement pitch P2 of the arrays 65 is preferably in the range of 1〇μηι~1〇0 Qing'. It is in the range of 1〇μηη~8〇μιη, and more preferably in the range of 20μπι~70卿. Further, the apex angle of the array 65 is preferably in the range of 3〇.~8〇. _, preferably in the 4g.~% Range. v For the light deflection element 6, in order to accurately produce the obtained stable optical performance, and in order to suppress the wear or deformation of the 稜鏡_ portion during the assembly of the light source device, it is also possible: The top of the column forms a top flat or top == = :: a decrease in brightness or by a _ two bright portion under the flat portion or a top = μ lower 'and more preferably 1 qing or less. The thickness of the first deflecting element 6 is, for example, 3 〇μιη~35()μιη. 33 201124778 2 represents the deflection of light generated by the light deflection element 6. The direction of the ♦ value of the light emitted from the light guide 4 in the figure (the light corresponding to the outgoing light = the peak). The light emitted from the light guide (4) is emitted obliquely, especially since it is effective. After the light person who is obliquely displayed in the display area f is incident on the first surface of the array 65, the second surface is reversed by the second surface, and the light is emitted to the light guide body 4 in a state where the directivity of the light emitted from the light guide 4 is substantially maintained. The surface of the surface 62 is emitted in a substantially normal direction. Thereby, high luminance is obtained in the direction of the normal to the light-emitting surface 62 in the red surface. The light-deflecting element 6 serves to cause the emitted light from the light guide 4 to be targeted. When the light deflecting element 6 and the light guiding body 4 that emits light having high directivity as described above are grouped, it is preferable to use a lens sheet which is used in the direction of deflection (angle change). At least one surface is a lens surface formed by a plurality of lens units side by side. For the shape of the lens formed on the lens sheet, various shapes can be used depending on the purpose, and examples thereof include a 稜鏡 shape, a lenticular lens shape, a fly-eye lens shape, and a wave shape. Among them, it is preferable to arrange a plurality of cymbals of a plurality of columns having a substantially triangular cross section side by side. However, for at least one of the two pupil planes constituting the array, the section may be composed of a plurality of straight lines, or may be composed of more than one curve' or may be combined by more than one straight line and more than one curve. And constitute. The light guide 4 and the light deflection element 6 can be composed of a synthetic resin having a high light transmittance. As such a synthetic resin, a mercapto acrylic resin, an acrylic resin, a polycarbonate resin, a polyester resin, a gas-based resin, and a cyclic polyolefin resin can be exemplified. In particular, the methacrylic resin has a high light transmittance of 34 201124778 and is excellent in heat resistance, mechanical properties, and moldability, and therefore is the most preferable. Such a methacrylic resin is a resin containing methyl methacrylate as a main component, and decyl methacrylate is preferably 8 Å or more. When the surface structure of the light guide body 4 and the rough surface of the light-polarizing element 6 is formed, or the like, the mold member having the desired structure can be used to heat the transparent synthetic resin sheet. The above-described structure can be formed by press-forming, and the above-described transparent/rubber board can be formed by screen printing, extrusion molding, or the like. Further, a structural surface may be formed using a thermosetting resin or a photocurable resin. Further, 'the surface of the transparent substrate such as a transparent film or sheet containing a lyoresin, an acrylic resin, a polycarb=ester resin, a vinyl chloride resin, or a polyfluorene acrylonitrile-based resin can be used. Forming a rough surface structure or a lens row including a living 1"sports b!_ ray hardening type resin can also be realized by subsequently, welding (four) square wires to a transparent substrate as described above. Chemical. As the active energy hardenable resin, a polyfunctional (meth)acrylic acid compound, an ethylene compound, a (meth)acrylic acid g, a propyl compound, a metal salt of (meth)acrylic acid, or the like can be used. As the light reflecting member 8, for example, a plastic sheet having a metal vapor-deposited reflective layer on its surface can be used. In the present invention, instead of light reflecting, a light reflecting layer or the like which is formed by a metal vaporous material on the manifold 4 may be used as the light reflecting element 8. Further, it is preferable that a reflection member is also provided on an end surface of the light guide 4 other than the end surface serving as the light incident end surface. In order to guide the light emitted from the LED to the light guide body 4 35 201124778 with a small loss, the reflector 1 ′ is provided with the reflector 1 ′. The reflector ι uses a plastic film having a metal vapor-deposited reflective layer on its surface. For example, the reflector 10 is wound from the outer edge of the end edge portion of the light reflecting member 8 toward the light emitting surface edge portion of the light polarizing element 经由 via the ' side. The outer reflector U) can also avoid the light deflection element 6' from the outer surface of the light reflection element 8 from the outer side of the LED and the light exit surface of the light guide body 4 = in the above embodiment, how much is used A dot-like light source such as an LED. In this case, it is preferable that a plurality of point light sources 0 are arranged such that the directions of the maximum intensity lights from the plurality of point light sources are parallel to each other, including the LEDs, the guide wires 4, and the domain rotation as described above. The display surface (display panel) such as a transmissive liquid crystal display element is disposed on the light-emitting surface of the light-emitting device (light-emitting surface 62 of the light-deflecting element 6) of the light-emitting element 8 and the light-reflecting element 8 to constitute a liquid crystal display device or the like. Image display device. In Fig. 1, reference numeral F denotes the above-described effective display area of the surface light source device corresponding to the effective display area of the display element used in combination with the surface light source device. In the present embodiment, the reflector 10 is configured to have an effective display area? The light deflection element 6 in the other region, the light guide 4, and the end face of the laminated body of the light reflection element 8 and the LED are covered. Thereby, the light emitted from the end surface portion of the laminated body and the light leaking from the case of the LED can be favorably diffused in the χγ plane, and can be incident on the light guide body 4 after being reflected, so that the required intensity can be obtained. The light is directed to a wide area 36 of the light guide light exit surface 43 201124778 domain' which can help to increase the uniformity of brightness. An observer observes the image display of the liquid crystal display device or the like through an element such as a liquid crystal display element from the upper side in Fig. 1 . Since: ^The collimated narrowly distributed light is emitted from the surface light source 1 to the liquid crystal display element. Therefore, there is no gray scale inversion or the like in the liquid crystal display element, and the image display with good brightness and uniformity of hue can be broken. At the same time, the direction set (4) of the ς can be obtained, and the utilization efficiency of the amount of illuminating light of the primary light source for illuminating the financial direction can be improved. Further, the light diffusing element 7 may be disposed adjacent to the light exit surface 62 of the light deflection element 6. The light diffusing element 7 can suppress the glare, bright spots, etc., which cause image degradation = quality degradation, and the quality of the image display can be improved. The light diffusing element 7 may be a light diffusing material _ sheet-shaped element = light diffusing element 7 may be integrated by the deflecting element 6 on the light emitting surface 62 side of the light deflecting element 6, or may be placed on the light deflecting When the Ueda light diffusing element 7 is placed on the light deflecting element 6, in order to prevent the light diffusing element 7 from adhering to the light deflecting element 6, it is preferable to make the light diffusing element and the light deflecting element 6 face each other (Μ In order to prevent the surface on the light-emitting side of the light-diffusing element 7 from being entangled between the liquid crystal display elements disposed on the surface, it is preferable to make the light-emitting side of the diffusing element 7 The surface is also formed with a concavo-convex structure. The concavo-convex structure k may be a structure in which the average ten-point roughness is preferably 'above' more than U. More preferably, more preferably 1. 5. the above. In the embodiment of the invention, the first lens array 44a and the second lens array 43b are disposed on the light reflecting surface 44 and the light emitting surface 43 in the die. In the present invention, as a modified form of the above embodiment, the lens row is provided only on the light reflecting surface 44, or the lens row is provided only on the light emitting surface 43. In the latter modified form, when the light reflecting surface 44 is an uneven surface such as a rough surface, the height of the convex structure 45 protruding from the light reflecting surface 44 is a height from the top of the convex portion. Fig. 9 is a schematic perspective view showing another embodiment of the surface light source device used in the present invention. In Fig. 9, the same symbols are denoted for members or portions having the same functions as those of the members or portions of Figs. In the present embodiment, a pair of side end faces (that is, side end faces on the opposite sides) which are substantially parallel to the γζ plane among the four side end faces of the light guide 4 are set as the light incident end faces 41, and the above two The light incident end faces 41 are disposed adjacent to each other in such a manner as to face each other, and the LEDs on both sides are covered by the reflector. In other words, in the actual state, the two end faces on the opposite sides of each other are respectively formed as the both-end incident type light guides of the light incident end faces, and correspond to the embodiment described with reference to FIG. The side of the opposite end face 42 is also the same as the side of the light incident end face 41. The two-end incident type light guide of the present invention is different from the light guide of the embodiment according to the reference of the first aspect, as shown in the following. These differences are mainly related to the configuration of the convex structure 45. The first difference is that the first region of the convex structure is in the shape of the cross section including the normal direction of the light emission and along the extending direction of the first lens column 4, and the height is along with the (four) light body 4 The area of the towel is increased away from each of the light incident end faces 41. Similarly, the second region 38 201124778 of the convex structure is in the shape of the cross section including the light direction of the light (four)® 43 in the extending direction of the lens row 44a, away from the end faces of the respective optical domains 41 of the light guide body 4 The average tilt angle of the region is preferably 7 degrees to 3 degrees. Owing area. Here, the first oblique angle is preferably 42. 2 degrees or more. In addition, the second difference of the first region is that the seed-like f-shaped structure has at least one of the following changes (Α,) to (9) - 41 faces 41 (A^ changes 'with the gauge 4 _ from the respective light incident ends, the average interval of the extending direction of the lens columns becomes shorter; (B') changes 'the length of the lens column extending toward the center of the light guide 4 away from each light incident end becomes longer; Moving away from each light incident end (C'), the height becomes higher toward the center surface 41 of the light guide 4; '(D) changes, as the light is directed toward the center of the light guide 4 away from each light incident end face 41' The average tilt angle of the two regions is increased. The same type of image display device as that of the video display device shown in Fig. 8 can be formed by using the two-end incident type light guide of the present embodiment. The surface light source device of the incident type light guide body and the display panel illuminated by the surface light source device. In particular, as an image display using a two-end incident type light guide body, the following is exemplified as follows. Multi-faceted display device and stereoscopic image display device. 39 shows a schematic configuration diagram of an embodiment of a multi-screen display device. Fig. 10 shows a first primary light source 21 of a surface light source device including the above-described two-end incident type light guide. And a second-order light source 22. The surface light source device includes: a two-end incident type light guide; the prism sheet is disposed adjacent to the light-emitting surface of the light guide, and faces the light-emitting surface of the light guide; a plurality of arrays are formed on the light incident surface, the plurality of types of mirror rows extending substantially in a direction parallel to the light incident end surface and substantially parallel to each other; and the first primary light source 21 and the second secondary light source 22 The first primary light source 21 and the second secondary light source 22 may include a plurality of LEDs disposed adjacent to the light incident end faces of the opposite-end incident light guides facing each other. A transmissive liquid crystal display panel 7' is disposed adjacent to the light-emitting surface on the opposite side of the smooth surface. A half of the display surface of the transmissive liquid crystal display panel edge is close to the side of the first primary light source 21. The first display screen area 71 is set, and the half display screen close to the side of the second-order light source 22 is the second display pupil area 72. The multi-face display device includes the synchronous drive unit 100. The face image signal is externally input to the synchronous drive unit 100. The synchronous drive unit 100 causes the first video 1-1 to be displayed on the first display screen of the transmissive liquid crystal display panel 7' in synchronization with the lighting of the first primary light source 21. In the area 71, the synchronous driving unit 100 displays the second video 1-2 in the second display pupil area 72' of the transmissive display panel 7' in synchronization with the lighting of the second-order light source 22. 201124778 (stereoscopic image display device) Fig. 11 is a schematic configuration diagram showing an embodiment of a stereoscopic image display device. Fig. 11 shows a first primary light source 21 and a second primary light source 22 of a surface light source device including the above-described two-end incident type light guide. The surface light source device includes: a light guide body having a two-end incident type; and a cymbal sheet disposed adjacent to the light exit surface of the light guide body, and having a plurality of light incident surfaces facing the light exit surface of the light guide body; In the array, the plurality of arrays extend substantially in a direction parallel to the light incident end surface and are substantially parallel to each other; and the first primary light source 21 and the second secondary light source 22. The first primary light source 21 and the second secondary light source 22 may include a plurality of LEDs disposed adjacent to the light incident end faces of the opposite-end incident light guides. The transmissive liquid crystal display panel 7 is disposed adjacent to the light-emitting surface on the opposite side to the light-incident surface of the prism sheet of the surface light source device. The stereoscopic image display device includes a synchronous drive unit 100. The stereoscopic image signal is externally input to the synchronous drive unit 100. The synchronous driving unit displays the left-eye visual field image IL as the first visual field image on the display surface of the transmissive liquid crystal display panel 7' in synchronization with the lighting of the first primary light source 21. [This display is referred to as a first visual field image display. ]. Further, the synchronous driving unit 1 显示 displays the right-eye visual field IR as the second visual field image on the display surface of the transmissive display panel 7 ′ in synchronization with the lighting of the second-order light source 22 [this display is called The second field of view image is displayed]. The synchronous drive unit 1 交替 alternately performs the first visual field image display and the second visual field video display as described above. 41 201124778 This can be used to display stereoscopic images. In other words, in this case, the directivity of the outgoing light distribution after the light emitted from the first primary light source 21 to the light guide and emitted from the light guide passes through the cymbal, and the second-order light source 22 The directivity of the light distribution of the light emitted from the light guide after passing through the slab is substantially changed to an angle corresponding to the parallax of the two eyes of the human body, and the light guide body and the prism sheet are preliminarily By setting the optical characteristics, stereoscopic observation can be realized without wearing glasses that selectively inject the first visual field image and the second visual field image into each eye. In the present embodiment, the light guide body may be orthogonal to the direction in which the lens row extends and the normal direction of the light exit surface (the direction of the boundary line between the light exit surface and the light incident end surface: the up and down direction in FIG. 11) Bend for the center. In this case, the cymbal and the display panel are also curved in the same manner. The use of such a curved light guide has the following advantages, such as when used as an electronic signage, to improve the novelty or to match the design to the settings. [Examples] Hereinafter, the present invention will be described by way of examples and comparative examples. Further, the following methods were used to evaluate the performance of the shirt image display device obtained in the examples and the comparative examples. <White Point> The secondary light source lighting is judged from the side of the exit surface by the portion around the target portion. It is determined that the one-to-one correspondence of the image display device corresponds to the pressing test as follows: : Uneven brightness unevenness due to abnormal illumination of 201124778 caused by scratches or the like of the light guiding body or the light reflecting element is not observed (defective appearance) X : Uneven brightness (poor appearance) caused by abnormal luminescence caused by the light-guided light-reflecting element _ mark or the like can be seen. <Adhesion> The secondary light source of the video display device is turned on, and the effective display area is judged by visual observation from the exit surface side. The judgment was as follows: 〇: The optical defect caused by the light connection between the light guide and the light reflecting element was not observed; X: The optical defect caused by the optical adhesion between the light guide and the radiation element was observed. <Brightness> The primary light source of the image display device was turned on, and the luminance in the normal direction in the effective display region of the image display was measured using a luminance meter (BM·7 made by TOPCON (10)). At this time, the measurement is performed at the position of 13 points (shown by 〇 mark in the figure) in the zigzag pattern shown in Fig. 12 [the number "10" in Fig. 12 indicates the size is 1 〇 mm], The average of the redundancy is divided into the following five stages. (When the light guide has one light incident end face): Example Example 8, Comparative Example 1 to Comparative Example 2 ◎ : 430 cd/m 2 or more; 〇 + : 400 cd/m 2 or more and less than 430 cd/m 2 ; : 350 cd/m2 or more and less than 4〇〇Cd/m2 ; △ : 250 cd/m2 or more and less than 350 cd/m2 ; X : less than 250 cd/m2 ; 43 201124778 (The light guide has two light incident end faces Case: Example 9 to Example 10, Comparative Example 3 ◎: 570 cd/m2 or more; 〇+ . 530 cd/m2 or more and less than 570 cd/m2; 0. 460 cd/m2 or more and less than 530 cd/m2 ; △ : 330 cd/m 2 or more and less than 460 cd/m 2 ; X : less than 330 cd/m 2 . <Homogeneity> The primary light source of the video display device was turned on, and the luminance in the normal direction in the effective display region of the video display device was measured using a luminance meter (BM-7 manufactured by TOPCON Corporation). At this time, at the position of 13 points in the zigzag configuration as shown in Fig. 12 (dry in the figure), the minimum brightness/maximum brightness is 60% or more, and the minimum brightness/maximum brightness is insufficient. 60% is judged as X. The brightness unevenness of the arrangement (HotSpot) > Lights up the primary light source of the image display device, and judges the effective display area by visual observation from the exit surface side, especially the area near the light source. The judgment was as follows: 〇. The luminance unevenness caused by the arrangement of the LEDs was not observed; Δ. The luminance unevenness caused by the arrangement of the LEDs was hardly seen. [Example 1] The machined surface of the 189 mm (x-direction dimension) χ 292 mm (Y-direction dimension) and the thickness of 3 〇 mm-plated Nip block 44 201124778 material) of the machined surface of the machined surface was machined. The transfer area of the second lens array 43b shown by 2 is formed from the surface mold (forming the mold member). Further, the fixed range in the second mold is used to transfer the shape to the two-two-hearted* 2 lens array 43b in a plane orthogonal to the extension direction t of the second lens array, and has a width of 7Q_(direction dimension), arc shape with radius of curvature. The rotation of the block = area has an inverted shape corresponding to the above-described circular arc shape. The length of the cutter (X-direction dimension) is set to 3 mm in the effective portion so as not to cause the cutting-and-warming portion to enter the effective display area of the light guide body 4, and the effective portion of the mirrored surface of the machined surface is the (10) plane ( χ directional dimension) X292 surface (Y-direction dimension), thickness of 3 _ additional plating > block (molding mold material) processing surface is cut to form a transfer to form as shown in Figure 2 The i-th lens array corrects the transfer surface of the convex structure 45. The first lens array 44a has a width of 9 μm (γ* dimension), a high yield of 9 Km (Z direction dimension), and a curvature radius of 117 sec in a plane orthogonal to the extending direction of the first lens row 44a. Arc $ shape. The cutting length (Χ direction size) is set to 189 coffee. Further, a portion corresponding to the top portion of the first lens array 44a is cut to form a transfer region for transferring the convex structure 45. The convex structure 45 provided at the front end portion of the first lens array 44a has a height of 4 μm, a length (= direction dimension) of 135 μm, a radius of curvature of the tip end portion of 16, and a width (Υ dimension) of 21 μm. A configuration is adopted in which the height is increased along the extending direction of the first lens column 44a, and then the height is decreased by 45 201124778. Specifically, the average tilt angle of the first region 45a is 3.39 degrees, and the average tilt angle of the second region 45b is 3.39 degrees. Further, the interval between the convex structures 45 is 180 μm in the extending direction of the first lens row 44a, and is 90 μm in a direction perpendicular to the extending direction of the first lens row 44a. Therefore, the distance between the arbitrary convex structure and the convex structure existing adjacent to the convex structure is different from the adjacent first lens row 44a. Specifically, the number of other convex structures 45 in the range of a circle having a radius of 1⁄4 times the height of the convex structure centering on the arbitrary convex structure 45 on the light reflecting surface 44 For 26 ~ 34. Further, the transfer region of the block has an inverted shape corresponding to the above-described convex structure. In addition, after the transfer structure for the first lens array 44a is formed by cutting, the glass beads (manufactured by P〇tters Ballotini Co., Ltd.) are used before the cutting process for forming the transfer structure for the convex structure 45 is performed. J4〇〇) to spray the processing surface of the block. In the squirting process, in a quantity of 34 g/min ' from a height of 200 mm, at a distance of 15 mm, from a side close to the light incident end face to a side away from the light incident end face multiple times in a strip shape Spraying out the glass beads' for each belt, changing the speed and pressure from 2 〇m/min to 4 m/min and from 2 MPa to 〇4 MPa, thereby forming an average inclination angle 0a of 〇7 degrees~ 2 Gradation of 〇 degree The second transfer surface forming mold (molding mold member) was obtained as described above. 46 201124778 The first transfer surface forming mold and the second transfer surface forming mold are placed in the throwing wire I and subjected to shot & molding. (4) Acid resin (ACRYpET TF 8 manufactured by Mitsubishi ray〇n Co., Ltd.) was used as a molding material. A schematic partial cross-sectional view of the obtained molded article, that is, the light guide 4 is not shown in Fig. 4 . Next, in order to generate a white point, the light guide body is placed on the stage where the square hole having a side length of 8 cm is vacant with the reflection surface facing upward, and then the light reflection element having the same size as the light guide body is disposed. (E6SR manufactured by TORAY Co., Ltd.) placed on the above-mentioned light guide body's sub-dust test, which is 20 mm (p indenter (front end rubber: W2 _ χΕ) 5 mm x H2.5 mm) from the light reflecting element The upper part is pressed against the central portion of the square hole until the maximum pressure 〇.02 kN is applied. The light guide body and the light reflecting element after the pressing test are disposed at equal intervals along the long side with respect to the long side end surface (light incident end surface 41) having a thickness of 〇·7 mm. One LED (E1S62-YWOS7-07 manufactured by Toyota Synthetic Co., Ltd.), and then the reflector 1配置. Further, a plurality of apex angles are arranged such that the lens row forming surface faces the light emitting surface 43 so as to face the light emitting surface 43 of the light guide. A 155 μm thick cymbal (Ml68YTC3 manufactured by MITSUBISHI RAYON Co., Ltd.) having a lens array of 29 μm in parallel was used as the light deflection element 6, and a surface light source device as shown in Figs. 1 and 2 was produced. The relationship between the surface light source device and the effective display area of the combined transmissive liquid crystal display element is such that the outer edge of the effective display area F is at a position 52 mm from the outer periphery of the guide light of 47 201124778. Is a transmissive liquid crystal display π member disposed opposite to the light exit surface of the surface light source device? Thus, an image display device is produced. Can be obtained by (4) the sub-filament lighting of the image display device, and the illumination is not visible when the observation is made, the brightness is uneven due to the configuration of the LED, and the uniformity of the baby is also good. Defects such as white spots or adhesions. [Example 2] The convex structure 45 of the tip end portion of the first lens array 44 & ur ^ MT @ 1 lens row 4 is changed in the same direction as 180 μιη to 360, and reading example 1 is performed. The phase is produced, and the device is displayed, and the state of illumination is observed. : On the light reflecting surface 44, the range of the circle having the radius of the magnification of the height of the convex structure is arbitrarily formed on the light reflecting surface 44, and the number of the eight convex structures 45 is 1〇. ~34. The results are shown in Table 1. [Example 3] The transfer area on the transfer surface forming mold of the reading magnification 1 was formed to transfer to form the second (four) system I, and the other one was the same as in Example 1. The image riding device was observed by Langfa. The results are not shown in Table 1. [Example 4] The first transfer surface forming mold was subjected to cutting processing, and a transfer region for transferring and forming the second lens array 43b was formed in a manner opposite to the example i, and was made of glass beads (Pern (10) Lan Xigong (4)). The toilet is used to perform the process of the nozzle 48 201124778 to form the first transfer surface forming mold. Furthermore, in theory, in the amount of 34 g / minute, from the height of 2 〇〇 mm, the spacing of the squirting point is from the side close to the light incident end face away from the light into the "mrn-side" band The glass bead is sprayed several times at the mouth, and the pressure and the pressure are changed from 20 m/min to 4 m/min, and the self-twisting = again to 0.4 MPa' to form an average tilt angle % 〇7 The gradient of the sound. After the planar transfer surface of the second transfer surface forming mold is processed, cutting is performed to form a transfer surface for transfer forming 45. Except for this, the same method as the example = = image display device was observed, and the light-emitting state was observed. The result is shown in the table in which the entire surface of the i-th transfer surface forming mold is cut to be opened; the transfer region for transferring the second lens array 43b is formed, and the method is the same as in the example 4 Make a shadow_show device state for observation. The results are shown in Table i. [Ninth example] ▲ The first region 45 of the convex structure 45' provided at the end of the first transfer surface forming mold of the second transfer surface forming mold has an average tilt angle of 45 degrees and an average tilt of the second region 45b. The image display device was produced in the same manner as in Example 1 except that the angle was 15 degrees and the length was 157. The state of light emission was observed. The results are shown in Table i. [Example 7] The average spacing of the convex structures 45 provided at the front end of the second lens surface forming mold on the front end of the second lens surface of the second lens lining is in the direction in which the second lens array 4 is extended, and is away from the light incident end surface. The image display device was produced in the same manner as in Example 1 except that 3 〇〇 μηη was shortened to 〖5 〇 μιη, and the processed surface of the obtained block was not sprayed with glass beads. The state of illumination is observed. Further, in the light reflecting surface 44, the number of other convex structures 45 existing in a range of a circle having a radius of 100 times the height of the convex structure centering on the arbitrary convex structure 45 is 14 ~40" The results are shown in Table 1. [Example 8] The height of the convex structure 45 provided at the tip end of the first lens row 44a of the second transfer surface forming mold in the extending direction of the first lens array 44a is further away from the light incident end surface ' at 3.5 μm In the range of 6.6 μm, the length (X-direction dimension) and the width (γ-direction dimension) of the convex structure 45 are also away from the light incident end face, respectively, at 88 μm to 166 μm, 20 μm~ The range of 26 μιη increases. At this time, the average inclination angle of the i-th region 45a and the second region 45b is kept constant at 4 57 degrees. As a result, the length of the first region of the convex structure 45 and the length of the second region vary from 44 μm to 83 μηη. The processed surface of the obtained block is not sprayed with glass beads. Except for this, an image display device was produced in the same manner as in Example ,, and the light-emitting state was observed. The results are shown in Table 1. [Comparative Example 1] A video display device was produced in the same manner as in Example 1 except that the convex structure 45 was not provided at the tip end of the first lens array 44a, and the light state of the hair 50 201124778 was observed. As a result, defects such as white spots or adhesion were observed around the fore edge portion of the image display device. [Comparative Example 2] The interval between the convex structures 45 provided at the tip end of the first lens row 44a is 810 μm in the extending direction of the first lens row 44a, and is at right angles to the extending direction of the first lens row 44a. A video display device was produced in the same manner as in Example 1 except that the direction was set to 810 μm, and the light-emitting state was observed. Further, in the light reflecting surface 44, the number of other convex structures 45 existing in a range of a circle having a radius of 1 〇〇 which is centered on the arbitrary convex structure 45 and having a height of the convex structure is One. As a result, defects such as white spots or adhesions were observed around the forehead portion of the image display device. [Example 9] The machined surface of the Nip block with a thickness of 414 mm (x-direction dimension) x 238 mm (Y-direction dimension) and thickness of 4 mm was machined by the mirror-finished machined surface to form a third surface. The transfer surface forms a mold. The machined surface of the 512 mm (x-direction dimension) x 238 mm (Y-direction dimension) and the additional iridium-plated block body having a thickness of 3 mm is processed by the mirror-processed effective part to form a transfer surface. The transfer surface of the lens array 44a and the convex structure 45 shown in Fig. 2 . The lens row 44a has a substantially circular arc shape having a width of 9 〇 μη (Y direction dimension), a directionality of 9 (z direction dimension), and a curvature radius of 117 μm in a plane orthogonal to the extending direction of the lens row 44a. Further, a portion corresponding to the top phase 201124778 of the lens row 4A is cut to form a transfer region for transferring the convex structure 45. The convex structure 45 provided at the front end portion of the lens column 44a has a height of 5 μm, a length of 135 μm, a radius of curvature R of the front end portion of 16 μm, and a width of 23 μm, and is configured to be along the lens. The direction of extension of column 44a increases in height and then decreases in height. Specifically, the average tilt angle of the first region 45a is 4.27 degrees, and the average tilt angle of the second region 45b is 4.27 degrees. Further, the interval of the convex structure 45 is set to 170 μm in the extending direction of the lens row 44a, and is set to 90 μm in a direction perpendicular to the extending direction of the lens row 44a. Thereby, the distance between the arbitrary convex structure and the convex structure existing adjacent to the convex structure is different from the adjacent lens row 44a, and the second transfer surface forming mold is formed. Specifically, the number of other convex structures 45 in the range of a circle having a radius of 1〇〇 times the height of the convex structure centering on the arbitrary convex structure 45 on the light reflecting surface 44 For 44 ~ 54. Further, the transfer region of the block has an inverted shape corresponding to the above-described convex structure. The first transfer surface forming mold and the second transfer surface forming mold are placed in an injection molding apparatus to perform injection molding. Acrylic resin (ACRYPET TF-8 manufactured by MITSUBISHI RAYON Co., Ltd.) was used as a molding material. Next, in order to generate a white point, the light guide body is placed on the stage where the square hole having a side length of 8 cm is vacant with the light reflection surface facing upward, and then the light having the same size as the light guide body is reflected. The component (E6SR manufactured by TORAY Co., Ltd.) was placed on the above-mentioned light guide body and subjected to a secondary pressing test, 52 201124778. The pressing test was performed by an indenter of 20 ππηφ (front end rubber: W2 mm x D5 mm x H2.5 mm) from the light reflecting element. The upper portion is pressed against the central portion of the square hole until the maximum pressure 〇〇 2 kN is applied. The light guide body and the light reflection element after the press test are opposed to the two short side end faces (light incident end faces 41) of the light guide body having a fullness of 0.7 mm, and are equally spaced along the short sides. 36 single-sided (72 on both sides) LEDs (E1S62-YWOS7-07 manufactured by Toyota Synthetic Co., Ltd.) 'The reflector is then configured. Further, a plurality of apex angles are arranged such that the lens row forming surface faces the light emitting surface 43 so as to face the light emitting surface 43 of the light guide. A lens sheet having a thickness of 155 μm (M165htc3 manufactured by Mitsubishi RAYON Co., Ltd.) which is formed by a lens array having a pitch of 29 μm is formed as a light deflection element 6, and a surface light source device as shown in Fig. 9 is produced. A transmissive liquid crystal display element 7' is disposed to face the light-emitting surface of the surface light source device, thereby producing a video display device. The obtained image display device was turned on to observe the light-emitting state. The results are shown in Table 1. [Example 10] The height of the convex structure 45 provided at the front end portion of the lens row 44a is set to 5.2 μm, and the average inclination of the first region of the convex structure 45 is made as the center of the light guide body is away from the light incident end surface 41. The angle is gradually changed from 5 degrees to 5 degrees, so that the average tilt angle of the second region of the convex structure 45 is changed from 4 degrees to 45 degrees ' and is convex away from the center of the light guide body 41 from the center of the light guide body. The length of the first region of the structure 45 is changed from 59.4 μm to 66.1 μm, and the length of the second region of the convex 53 201124778 structure 45 is changed from 74.4 μm to 66.1 μm, and is present in an arbitrary convex structure 45. A surface light source device was produced in the same manner as in Example 9 except that the number of other convex structures 45 in the range of a circle having a radius of 100 times the height of the convex structure was 50 to 60. The obtained surface light source device was turned on, and the light-emitting state was observed. The results are shown in Table 1. [Comparative Example 3] A video display device was produced in the same manner as in Example 9 except that the convex structure 45 was not provided at the tip end of the first lens array 44a, and the light-emitting state was observed. As a result, defects such as white spots or adhesion were observed around the fore edge portion of the image display device. The details of the light guides in the above examples and comparative examples and the evaluation results of the image display device are collectively shown in Table 1 below. 54 201124778 J-a66fN9rn <] Comparative Example 3 1 1 1 I 1 I 1 1 1 1 Example 10 (N 50 ～ 60 59.4-^66.1 yn Τ Ο ν*ί 74.4—66.1 4.0—4.5 CO (Ν Ο Example 9 44 ～ 54 τί- VO A v〇ΓΛ (Ν Ο § Comparative Example 2 Inch 〇 〇 〇 OS m rn in vo Os ΓΟ rn VO CS ο oo Ο OO Comparative Example 1 1 1 1 1 1 1 1 1 1 1 Example 8 VO \6 T ΓΛ 26-34 00 τ 5 m 00 T 5 卜 '«t \〇20—26 gg Example 7 inch 14~40 i Os mc〇On m rn CN 300-150 Example 6 inch 26-34 inch m <n ν-ϊ cs g § Example 5 inches 26 to 34 ίο On m rn in ON m cn v〇 (N g instance 4 inches 26 to 34 ίο Os m rn in VO as m ro v〇 <S g Example 3 inch 26 〜34 ιη δ On cn cn ίο 〇\ m CO Ό cs g 冢 Example 2 inch 10~34 5〇〇\ m cn v〇v〇Os cn (N 180^360 inch CN ιη Οο Os CO in v〇ON cn cn gg Height of convex structure [μη] ^ <1 〇^ ^ 〇14c ^ ^ -ss The length of the first region 45a of the target C la W趔雉 [μηι] S n Cd ^ l〇> - 1 inch sigh tel) the length of the second region 45b [μηι] Forgetting m 1»—1 til engine (the radius of curvature of the front end of N踅城屮[μιη] Width [μηι] i The interval of the extension direction of the first lens column [μπι] ____ Breaking®: 痤S Ή £5; ^ -S: ^ =0Lamb 15^ Tea V0 vs. Single vs. School of Copper Science iMvsp珈VB Xue M M «学珈电厚0域201124778
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短邊兩側 X X X X <] 〇 〇 ◎ 〇 <] 碡 0 〇 〇 〇 <] 僅存在 於入射 側端緣 部 X X + 〇 0 〇 僅存在 於入射 侧端緣 部 X X 〇 〇 〇 僅存在 於入射 側端緣 部 〇 〇 ◎ 〇 〇 僅存在於 入射侧端 緣部 〇 〇 ◎ 〇 〇 個面 〇 〇 + 〇 〇 〇 存在於 整個面 〇 〇 + 〇 〇 <] 僅存在 於入射 侧端緣 部 0 〇 <1 〇 0 〇 〇 + 〇 〇 <1 僅存在於 入射侧端 緣部 〇 〇 + 〇 〇 〇 +P 僅存在 於入射 側端緣 部 〇 〇 + 〇 〇 〇 粗縫面化 第2透鏡列的有無與 範圍 粗链面化 入射位置 黏附 均齊度 nr> 〇 μ a to CO ® 'S Q 5 •B K· •33 VB 201124778 【圖式簡單說明】 圖1是表示本發明中所使用的面光源裝置的一個實施 形態的模式性立體圖。 圖2是表示本發明中所使用的面光源裝置的一個實施 形態的圖，且是一次光源附近部分的模式性分解立體圖。 圖3是表示本發明中所使用的導光體的一個實施形態 的模式性立體圖。 圖4是表示本發明中所使用的導光體的一個實施形態 的模式性剖面圖。 圖5是表示本發明中所使用的導光體的一個實施形態 的光反射面的模式圖。 圖6是表示本發明中所使用的導光體的一個實施形態 的模式性剖面圖。 圖7是表示本發明中所使用的面光源裝置的一個實施 形態的模式性部分剖面圖，尤其是表示由凸狀構造產生的 光反射的情況的圖。 圖8是表示本發明的影像顯示裝置的一個實施形態的 模式性部分剖面圖，尤其是表示自導光體的光出射面射出 的光的光偏向的情況的圖。 圖9是表示本發明中所使用的面光源裝置的一個實施 形態的模式性立體圖。 圖10是表示本發明的多晝面顯示裝置的一個實施形 態的概略構成圖。 圖11是表示本發明的立體影像顯示裝置的一個實施 57 201124778 形態的概略構成圖。 圖12是表示實例中的亮度測定位置的模式圖。 【主要元件符號說明】 2 一次光源 4 導光體 6 光偏轉元件 7 光擴散元件 7' ·透射型液晶顯不面板 8 :光反射元件 10 :反射器 21 :第1 一次光源 22 :第2 —次光源 41 :光入射端面 42 :相反端面 43 :光出射面 43a :粗链面 43b :第2透鏡列 44 :光反射面 44a :第1透鏡列 45 :凸狀構造 45a :第1區域 45b :第2區域 61 :入光面 62 :出光面 58 201124778 65 :稜鏡列 71’ ：第1顯示晝面區域 72':第2顯示晝面區域 8 0 :光線 100 :同步驅動單元 A、C、D :點 F:有效顯示區域 1-1 :第1影像 1-2 :第2影像 I-L :左眼視野影像 I-R :右眼視野影像 Μ :點線 Ν :線 PI 、Ρ2 :排歹ij間距 R，：圓 X、Y、Z :方向 59XXXX <] 短 ◎ 〇 <] 碡0 〇〇〇<] only exists on the incident side edge XX + 〇0 〇 only exists on the incident side edge XX 〇〇〇 only exists On the incident side edge portion 〇〇 ◎ 〇〇 exists only on the incident side edge portion 〇〇 ◎ 〇〇 face 〇〇 + 〇〇〇 exists in the entire face 〇〇 + 〇〇 <] only exists at the incident side Edge 0 〇 <1 〇0 〇〇+ 〇〇<1 exists only on the incident side edge 〇〇+ 〇〇〇+P only exists on the incident side edge 〇〇+ 〇〇〇 rough surface Whether the presence or absence of the second lens array adheres to the range of the coarse-stranded incident position nr> 〇μ a to CO ® 'SQ 5 • BK· 33 VB 201124778 [Simplified Schematic] FIG. 1 shows the present invention. A schematic perspective view of one embodiment of the surface light source device used. Fig. 2 is a view showing an embodiment of a surface light source device used in the present invention, and is a schematic exploded perspective view of a portion near a primary light source. Fig. 3 is a schematic perspective view showing an embodiment of a light guide used in the present invention. Fig. 4 is a schematic cross-sectional view showing an embodiment of a light guide used in the present invention. Fig. 5 is a schematic view showing a light reflecting surface of an embodiment of a light guiding body used in the present invention. Fig. 6 is a schematic cross-sectional view showing an embodiment of a light guide used in the present invention. Fig. 7 is a schematic partial cross-sectional view showing an embodiment of a surface light source device used in the present invention, and particularly showing a state in which light generated by a convex structure is reflected. Fig. 8 is a schematic partial cross-sectional view showing an embodiment of a video display device according to the present invention, and particularly showing a state in which light of light emitted from a light exit surface of a light guide is deflected. Fig. 9 is a schematic perspective view showing an embodiment of a surface light source device used in the present invention. Fig. 10 is a schematic block diagram showing an embodiment of a multi-faceted display device of the present invention. Fig. 11 is a schematic block diagram showing an embodiment of a three-dimensional image display device according to the present invention. Fig. 12 is a schematic view showing a brightness measurement position in the example. [Main component symbol description] 2 Primary light source 4 Light guide body 6 Light deflection element 7 Light diffusion element 7' Transmissive liquid crystal display panel 8: Light reflection element 10: Reflector 21: First primary light source 22: 2nd — Secondary light source 41: light incident end surface 42: opposite end surface 43: light emitting surface 43a: thick chain surface 43b: second lens array 44: light reflecting surface 44a: first lens array 45: convex structure 45a: first region 45b: Second area 61: light-incident surface 62: light-emitting surface 58 201124778 65 : array 71': first display pupil area 72': second display pupil area 8 0: light 100: synchronous drive unit A, C, D : Point F: Effective display area 1-1 : 1st image 1-2 : 2nd image IL : Left eye view image IR : Right eye view image Μ : Dotted line Ν : Line PI , Ρ 2 : Row 歹 ij spacing R ,: circle X, Y, Z: direction 59