1311881 • (1) ， 九、發明說明 【發明所屬之技術領域】 本發明’係關於被影像掃描器、傳真機或是影印機等 影像讀取裝置所使用的線狀照明裝置，特別是關於：對原 稿的讀取面作照射，並讀取其反射光的影像偵測系統中所 使用的線狀照明裝置、及使用有其系統的影像讀取裝置。 Φ 【先前技術】 從以前起’被用在影像掃描器、傳真機或是影印機等 影像讀取裝置中的影像偵測器，其種類有縮小型、密著型 等等。在這之中，密著型影像偵測器（以下略稱爲 CIS ) ’係由照明裝置、等倍成像光學裝置、線狀偵測器 等所構成。而，像這種CIS，一般而言，由於和利用縮小 光學系統的影像偵測器相較，其光路長較短，因此備有此 種影像偵測器的機器具有易於小型化的特徵。像這樣，由 # 於CIS容易組裝至機器內部，因此逐漸取代了縮小光學系 統，而經常被使用在薄型的平板型影像讀取裝置上。像這 樣被使用於CIS中的線狀照明裝置，係被要求能將原稿面 以必要以上的照度照明’並需使從原稿反射的反射光以足 夠的強度到達線狀偵測器處。 圖4係爲過去的密著型影像偵測器之斷面圖，展示有 導光體42的數目爲一條時的情況。此密著型影像偵測 器，係具備有用以照射原稿的光源，並透過透鏡4 4，將由 原稿49而來的反射光’在由光電變換元件（CCD )所形 1311881 (2) " 成的受光部作接收’並轉換爲電氣訊號。 於同圖中，43係爲支撐構成構件的框架，44係爲將 原稿4 9的光學影像在線狀偵測器4 5上作成像的透鏡陣 列。45係爲具備有複數之：爲將原稿49的光學影像光電 變換成電氣訊號的受光部’並成線狀配置、的線狀偵測 器。4 6係爲搭載有線狀偵測器4 5的偵測基板。4 1 r、 4 1 g、4 1 b係分別爲具備有對原稿49作照明之LED (發光 φ 二極體）的光源，並被配置於沿長度方向延伸之導光體42 的某一側端面。光源單元 41，係爲具備有··將由 LED41r' 41g' 41b而來的射入光導入，並被設計爲能對 線狀偵測器4 5之一條線的長度整個作照明且光量成略爲 均一、之導光體42。47係爲連接偵測器訊號與外部機器 的連接器，而48係爲支撐原稿49之由透明玻璃所製的原 稿支撐台。 被由配置於導光體42之端面的LED所射出的光，被 Φ 由丙烯所製成的導光體42所導引，並在其內部一面作複 雜的反射，而由射出面（出光部）射出至外部並對原稿49 作照明。而以幫助此導光體內之反射爲目的，在導光體4 2 之反射部和終端部（入光面的相反側）處，最好是能配置 有氧化鈦或鋁箔粉末來作爲印刷等的手段。 作爲這些線狀照明裝置，係採用在丙烯製的棒狀透明 體（導光體）的一端部分（入光部）處設有發光二極體的 線狀之照明裝置。 (詳細請參考：日本國專利登錄公報 第2693098 (3) 1311881 號、特開平8 - 1 63 320號公報及特開平10_24 1 432號公報） 被記載於這些公報上的線狀照明裝置，係藉由僅在棒 狀透明體（導光體）之一端配設發光二極體LED，以圖對 成本作削減。更進一步，對導光體的形狀下工夫，使其能 沿此導光體的長度方向得到均一的照度，並將其以··使由 LED而來的光’能從被射入之導光體的入光面起朝向終端 部’能盡量得到均一的照度的被構成。 然而’如上記之過去的例子中，存在有以下之課題。 首先’於圖5A及圖5B處，將於特開平10-241432號 公報所記載的過去之線狀照明裝置其斷面形狀之一例作展 示，並對其課題點作說明。 圖中之箭頭，係表示光線的方向。在圖5Α中，於由 入光面而來的光以與圖面成略垂直之方向而進入的導光部 5〇1 ;和將其光作射出的出光部5 02之間，配置有如500 所示之楔形狀的突起。於此構成中，會存在較多的：由出 光部502回到導光部501的光510。又，由導光部501前 進至出光部502處的光511，亦爲向與所定方向不同的方 向射出。因此，這些光並無法成爲有效的照明光。其結 果，造成照明光量的不足，且無法將照射光量提高等問 題。 又，於圖5Β中，如500、503所示，配置有2個楔形 狀的突起。對這些的形狀而言，同樣的’由導光部5 0 1側 的底面521所反射之反射光512，進入出光部502，並朝 與原稿之照明無關的方向將光射出。又，在相反方向’就 -6- 1311881 ' (4) ' 像由出光部5 Ο 2側的底面5 2 2處反射而來的 由出光部5 0 2回到導光部5 Ο 1處，使其光變 因此會造成：對原稿之照射光量減低的問題 【發明內容】 〔發明的槪要〕 本發明之目的，係爲解決此種過去的問: φ 本發明之特徵，係爲在密著型影像偵 供：在能將由線狀之照明裝置射出的照明光 同時，亦能使沿著導光體之長度方向的照度 的線狀照明裝置。 又，本發明之特徵，係爲提供能改善照 動特性，並能更加延長導光體之有效讀取長 M-iz 裝置。 本發明，係具備有： φ 光源； 導光體’其係具備有：由透明的媒質所 前記光源之光由入光面射入，並將該光沿長 的導光部；和具有用以使被前記導光部所導 前記長度方向作線狀射出之射出面的出光部 第1及第2突起，爲控制由前記導光部 光部的光量，在前記導光部和出光部之間， 之長度方向’以互成對向之位置而被配置。 則記之第】突起係爲楔形，其高度因應前記 反射光，光會 的無法射出， 證點。 則單元中，提 之照度增大的 分布更爲均一 明光照度的起 度的線狀照明 構成，將來自 度方向作導光 引的光在整個 ;和 進行至前記出 沿前記導光體 入光面之距離 -7- (5) 1311881 而變化，前記第2突起之前記導光部側壁面對前記導光部 側底面所構成的第1角度，比前記第2突起之前記出光部 側壁面對前記出光部側底面所構成的第2角度爲大。 又，前記導光體更進一步具有： 從前記入光面起沿前記長度方向，前記之第2突起的 高度，爲呈連續增加之第1區域；和 延續前記第1區域，而前記之第2突起的高度呈略爲 一定之第2區域。 更進一步，前記導光體係具備有： 從前記入光面起沿前記長度方向，前記之第2突起的 高度，爲呈連續增加之第1區域；延續前記第1區域，而 前記之第2突起的高度呈略爲一定之第2區域；和延續前 記第2區域，沿前記長度方向至終端部，前記之第2突起 的高度，爲呈連續減少之第3區域。 〔發明之效果〕 如藉由本發明，則不僅能將線狀照明裝置的照度提 高，亦可使照度分布更爲均一。又，由於在導光體的入光 部附近處，被射出的照明光其照度分布係爲均一，因此能 取得更長的導光體有效讀取長度，而能減少不必要的使用 空間，在製品實際組裝上也具有能小型化的優點。又，就 算對應於導光體，LED的配置位置有所偏差’也因其對照 度分布之影響變小，因此在LED安裝工程中，也能將高 度調整工程變的較爲簡便。 -8- (6) 1311881 【實施方式】 〔發明之最佳實施形態〕 以下’參考附錄之圖面，對適合於本發明之實施例作 詳細說明。另外，以下之實施例，並不僅是限定於屬於專 利申請範圍之本發明，又，於本實施例中所說明之特徵的 組α ’作爲本發明之解決手段，亦並不一定全爲必須。 # 屬於本實施例之線狀照明裝置的導光體，基本上雖是 與圖4中所示之導光體爲同樣形狀，但其特徵爲：在導光 部與出光部之間，取代楔形狀的突起，係爲具有長方形的 突起構造。如此這般，在本實施例中，具有特徵爲：除了 舊有的線狀照明裝置之外，更在導光部附近及/又或是出 光部附近處，附加有用以控制射出光量之新的構造。 〔第〗實施例〕 # 於圖1A、1Β，展示屬於本發明之第1實施例的線狀 照明裝置例。 圖I A，係爲展示：於屬於第1實施例之線狀照明裝 置，其導光體〗00之長度方向略中央部的斷面圖。此導光 體100，係可沿其長度方向，大略分爲導光部101和出光 部1 02。在此導光面100之至少一側的端面（以下，稱 爲入光面]1〇(圖1B)) 附近，配置有作爲光源的 LED 1 20。導光部1 0 1，係接收由配設於入光面1 1 0之外側 附近的LED 120處所射出的光，並擁有：在將其傳達至導 1311881 . (7) . 光部1 〇〇之長度方向的同時，將其光向出光部1 02 的功能。出光部1 ，係從導光部1 〇 1接收光，並 出光部102之一部分而被設置的光之射出面處，向 方向射出光。藉由此，原稿的讀取對象部分被作線 明。 在圖1A中所示之導光體100，係在導光部π 光部102之間，形成有具一定高度之長方形構造 | 103，並更進一步，在與此突起103成對向之位置 有楔形狀的突起1 (以下，略稱爲楔部）。此種 起1 03和楔部1 04來達到光量調節弁之效果的方法 舊有之想法共通。但是，於此第1實施例中，藉由 形作爲突起1 03之斷面形狀，能夠更加有效的控制 部1 〇 1與出光部102之間的光之傳達。又，關 1 0 4，沿著導光體1 0 0之長度方向，藉由對應與光 的距離，來對楔部1 04之高度作變化，便能對進入 > 102的光量作控制。具體而言，楔部104之高度， 光體1〇〇之長度方向的略中央處爲最高，而在入光 端部處其高度則降低。又，關於突起1 0 3，其相對 部1 02之低面的角度（最好爲銳角），係較其相對 部1 〇 1側之底面的角度爲小。 圖1 B，係對此導光體1 00之全體作展示的槪 圖。 此導光體100,係由透明之媒質所形成，突起 從入光面1 ] 0處朝向終端部以同樣之形狀被形成 而展開 由作爲 所定之 狀的照 >1與出 的突起 ，設置 藉由突 ，係和 以長方 在導光 於楔部 源之間 出光部 係在導 面及終 於出光 於導光 觀斜視 103係 ，楔部 -10- (8) 1311881 1 〇4則是以高度在兩端部附近爲較低；而高度在中央附近 爲最筒一般的被形成。 圖2係爲：用以對突起1 〇 3之功能作說明的導光體 100之斷面圖。 於圖2中，和於圖5 A、5 B中所示之舊有例相較，突 起1 03的出光面側’具備一擁有縱方向角度之壁面。藉由 此’在可以遮斷從導光部1 0 1處以低角度向出光部1 0 2直 接前進之光201的同時，也具有將從出光部】〇2回到導光 部101之光202遮斷的功效。如此這般，藉由屬於導光部 1〇1之第1的底面2 1.0、和屬於出光部1〇2之第2的底面 211，將能減少一度進入出光部1〇2，而再度回到導光部 101的光，又’由於其也能使從導光部1〇1處進入出光部 1 02的光更有效率的被利用，因此和舊有例相比，能增大 原稿上之照度。 圖3係爲：對屬於本實施例之照明裝置，其長度方向 的照度分布作說明之圖。 於圖3中，作爲光源之LED ’係被配置於入光面側、 亦即是圖3之左側’縱軸係表示：沿導光體〗〇〇之長度方 向，於原稿之照明位置處的相對照明光量。又，橫軸係表 示：距離入光面1 1 0之距離（單位爲mm )。 於圖3中’標不爲3 0 0的線’係表示屬於本實施例之 照明裝置其照度特性；標不爲3 0 1的線，則是表示j々圖 5 B中展示有其斷面之舊有例之照明裝置其照度特性。# 舊有的照明裝置中’在離入光面1 1 0約1 5mm的位置其照 -11 - 1311881 ' Ο) ' 度上昇’而後標示出最大照度，並朝向終端部漸漸減衰。 可以推測其原因爲：在入光面1 1 〇之附近，由光源 (LED)處所射出之光的一部分直接進入出光部1〇2，因 而使入光面附近之光量增大。 相對於此，於屬於本發明之第1實施例之照明裝置 中’可以得知，其能緩和上述之傾向，並能在導光體100 之整個長度方向得到幾乎爲均一的照度。 〔第2實施例〕 在此，如對展示有屬於第1實施例之照明裝置其照明 特性的圖3作更仔細的觀察，則可以得知：距離入光面 1 1 0約1 5 m m附近，有照度較低之區域：又，於距離終端 部約1 〇mm附近，同樣也存在照度更加下降之區域。可以 推測，此乃因爲由光源120而來之直接光一直進入至導光 體100之略中央部份爲止，因此在入光面110的附近，光 φ 擴散而造成到達出光部102之光變少。 另一方面，於舊有之照明裝置中，在離入光面 2 0〜5 0mm範圍內能得到照度之峰値。可以推測其原因爲： 因爲由光源處直接到達出光部502之光亦被加算之故。相 對於此，由於在照明裝置之入光面的極附近處，其照度減 低的關係，因此在此入光面之極附近處，則無法讀取原 稿。又，同樣的，在入光面之相反側的終端部處，在離終 端部數公厘的範圍內，也有照度減低的部分。故而，此處 被要求能將照度減低部分之長度減短，並減少無用之處。 -12 - 1311881 • (10) ' 像這樣的照度特性，於不同顏色之情況下亦會有些許 差異。現在，在許多的c IS中，被使用有紅、綠、藍3色 的LED。這些LED乃如圖4所示，在導光體之入光面附 近處，於水平方向並列的被配置。因此，經由其被配置之 位置，會有：離出光部越遠的LED，其照度之起動特性越 差的傾向。其結果造成：不光是入光部附近之照度的均一 性，連於出光部之色度特性也會減低。 φ 又，像這樣照度減低的部分，由於無法用以讀取原 稿，因此CIS的兩端部分將無法使用而變的無用。因此， 如何將照明裝置在維持小尺寸的情況下，能使全區域變爲 有效區域，便成爲被要求的課題。 於是，在第2實施例中，爲了改善入光部附近之照度 低下問題，於入光面之極附近處，將突起103之高度減 低，使過去被遮斷之由光源120而來之直接光的一部分， 能被導入出光部1 〇2，並利用作爲照明光。如此這般，具 φ 有能將入光面附近的照度較低之區域減少的特徵。 圖6，係爲屬於本發明之第2實施例的導光體10 0a其 槪觀斜視圖。 此導光體l〇〇a’係將丙烯材料成型加工爲如圖6所示 之形狀而得。此導光體1 00a，和前述之第1實施例相同， 具有特徵爲：爲細長形狀 '在其中具備有將由光源120發 出之光導引至長度方向的導光部1 〇 1;和射出將原稿以線 狀作照明之照明光的出光部1 0 2。在將此導光部1 0 1和出 光部1 〇 2分離之處’和第1實施例相同，被形成有如圖6 -13- 1311881 (11) ' 所示之楔部1 Ο 4和突起1 Ο 3。 此突起103之形狀，係具備有：沿此導光體i〇〇a之 長度方向，一直到距離入光面1 10約5.5mm附近爲止，其 高度徐徐增加之第1的突起區域601;和其後其形狀爲至 終端部爲止維持一定高度之第2的突起區域602。其特徵 爲：直到距離入光面110約5.5mm附近爲止之區域中，突 起103及楔部104之高度，係由高度約略爲零（高度=〇) φ 之狀態開始，朝向終端部之方向其高度徐徐增高；而由第 1的突起區域601進入第2的突起區域602後，突起103 的高度’舉例而言，如前述之第1實施例，其高度爲一 定。藉由此’包括由導光部120而來的直接光、和由導光 部100a之底面而來的光，係設計爲能使更多的光由導光 部101到達出光部102。如此這般，來對入光面11〇附近 處之照度低下作補救。 在入光面110的附近處，存在有由LED120處直接進 # 入至出光部1〇2的光，過去’爲了盡量不要使用此直接 光’係採用形成突起等以將其遮斷。相對於此，於此第2 實施例中，則相反的藉由利用此由光源1 2 0而來之直接 光，而成功的提高了入光面110附近處之照度。 而又與此相反的，在與入光面110之距離較長的部 分，則藉由將突起103之高度增高，並使楔部1〇4之高度 對應其距離而變化，來對光量作調節。藉由此，來對到達 出光部102處之光量作調整，以使導光體l〇〇a之長度方 向的照度能變爲均一。 -14 - 1311881 • (12) ' 對藉由此第2實施例之導光體i〇〇a，而提高了入光面 11 〇附近之照度的結果，參考圖9並作說明。 圖9’係爲展示有：屬於本發明之第〗、第2實施例 的照明裝置’其入光面附近之照度起動特性的展示圖。於 圖中’ 900係展示由第1實施例所得之結果；90!則展示 由第2實施例所得之結果。 在圖9中，雖然係以相對値標示入光面附近之照度， φ 但可以得知：在第2實施例中，相較於第1實施例，在距 離入光面約4mm附近’其照度的起動較爲良好。經由 此，可以得知：能對原稿作有效照射的導光體有效長度變 的更爲增加’相對而言，對對應於一定寬幅之原稿的導光 體來說，就能從增加之有效長度來減少導光體本身之長 度。 又，由第2實施例之導光體i〇〇a的形狀，更進—步 能得知，其具備有以下所述之新效果。 # 圖〗〇’係爲展示有：在屬於本發明之第1實施例的照 明裝置中’當LED之組裝位置不同時，其照度分布的展 示圖。 對第1實施例所示之導光體100而言，當被配置於其 入光面1 1 〇側之LED 1 2 0，其配置位置朝縱方向偏差的情 況下，導光體100的整個長度方向之照度分布將會不同。 尤其是靠近入光面110的區域，可以得知就算LED 120的 組裝位置僅有少許的不同，也會有很大的照度變化°因 此，在第】實施例之照明裝置中，在製造工程上需要細心 -15- (13) 1311881 調整LED 1 20的組裝高度位置，而使製造工程變的非常繁 雜。 圖1 1爲展示屬於本發明之第2實施例的照明裝置 中，當LED的組裝位置不同時其照度分布。 圖1 1中，展示有當LED之組裝位置不同時於長度方 向的照度分布特性。依此可知，就算LED的組裝位置不 同，在照度上也沒有什麼變化。因此在製造工程上，LED 的位置調節變的簡單，另外在製品照度分布的差異也變小 之外，製造工程時間也能縮短。 〔實施例3〕 於此第3實施例中，除入光面1 1 〇外，再加上將終端 部附近的突起1 03之高度作階段性變化的構造。圖7展示 有其細節。 圖7，係爲展示屬於本發明之第3實施例的照明裝置 其導光體l〇〇b之槪觀斜視圖。 於此第3實施例中，沿導光體1 〇〇b之長度方向，突 起103之形狀如圖7所示，其特徵爲設置有：在由入光面 110起突起之高度漸漸增高之第1的突起區域701、形成 有高度一定之突起103之第2的溝區域702、並加上由離 終端部約6mm起突起1 03漸漸變低之第3的溝區域703。 另外，楔部1 04之形狀則和前述之第〗與第2實施例相 同。 又，於導光體1 00b之終端部，配置有由鋁等所構成 -16- 1311881 • (14) - 之反射部件，以提升自光源120而來之光的反射效率。藉 由此，變爲和於終端部配置有光源同樣之構成’緩和於終 端部附近照度低下之傾向。因此’能減少終端部附近照度 低下之部位。其結果，使相對的能給予有效照度之導光體 的有效長度變長，並能將因照度減低而無法使用的區域減 短。藉由此，因爲能將對一定長度之原稿照射的照明裝置 之長度縮短的關係，故能將影像讀取裝置之幅寬縮短同樣 φ 長度。 另外，於上述之第1及第2實施例中，亦可在導光體 1 〇〇b之終端部，配置由鋁等所構成之反射部件。 〔實施例4〕 針對使用有屬於本實施例之照明裝置之平板型影像掃 描器作說明。 圖8係爲屬於本發明之實施例的影像掃描器之一應用 φ 例的影像讀取裝置之槪觀斜視圖。此處乃展示有使用了密 著型影像偵測器的平板型影像掃描器之例。 於圖8中’ 8 1係具備有本實施例之照明裝置的c IS。 8 2係作爲原稿支持體之玻璃板，8 3爲使C I S運轉之導 線’ 84係移動導線83以掃掠CIS之驅動馬達，85爲原稿 之壓板。 藉由驅動驅動馬達8 4以使導線8 3作機械式的移動， CIS 8 1係向讀取方向（掃描方向）移動並可讀取原稿之影 像資訊。CI S係作爲照明部被一體組入的偵測單元而被構 -17- (15) 1311881 ' 成，由被照射之原稿而來之反射光係經由CIS中之透鏡陣 列（不圖示）而被集光至光電變換元件’作爲影像資訊一 條線一條線的被輸出。如此這般，可讀取並輸出片狀之影 像資訊。 搭載有屬於本實施例之CIS單元的影像掃描器’由於 能將照明裝置之長度更加縮短，因此能縮短影像掃描器之 幅寬，並能對縮小影像讀取裝置之大小一事作出貢獻。 % 若經由如上述說明之本實施例，則不只能將線狀照明 裝置的照度上昇，亦能使照度分布更爲均一。 又，由於在導光體之入光部附近被射出的照明光其照 度分佈變爲均一，因此能取得更長的導光體有效讀取長 度。藉由此，能減少不必要的空間，並具有在製品實裝上 也能小型化的優點。 又，由於對應於導光體，就算LED之組裝位置有偏 差’也能縮小對照度分布的影響，因此在LED的組裝工 ® 程中，能使組裝位置之調整變的較爲簡便。 本發明並不限定於上述之實施例，在不脫逸出本發明 趣旨的範圍內，可以做種種的變更與修正，故本發明之技 術範圍應特定於以下請求範圍之內。 【圖式簡單說明】 圖〗A及圖1 B，係爲屬於本發明之第1實施例的線狀 照明裝置其斷面圖及斜視圖。 圖2，係爲當使用屬於第1實施例之線狀照明裝置 -18- (16) 1311881 時，其光學效果的展示圖。 圖3，係爲本發明的第1實施例1中之線狀照明裝 置，其長度方向的照度分布展示圖。 圖4，係爲既有之密著型影像偵測器的構成斷面圖。 圖5 A、5 B，係爲展示擁有楔部之舊有照明裝置的斷 面圖；和並非理想之光線動線的展示圖。 圖6，係爲表示屬於本發明之第2實施例的照明裝置 其構造之斜視圖。 圖7，係爲表示屬於本發明之第3實施例的照明裝置 其構造之斜視圖。 圖8 ，係爲使用有屬於本發明實施例之照明裝置的平 板型影像讀取裝置其中一例的展示圖。 圖9，係爲表示有：屬於本發明之第1、第2實施例 的照明裝置，其入光面附近之照度起動特性的展示圖。 圖1 0，係爲表示有：在屬於本發明之第1實施例的照 明裝置中，當LED之組裝位置不同時，其照度分布的展 示圖。 圖11，係爲表示有：在屬於本發明之第2實施例2的 照明裝置中，當LED之組裝位置不同時，其照度分布的 展示圖。 【主要元件符號說明】 4 1 :光源單位 41r,41g,41b :光源 -19- (17) 1311881 42 :導光體 4 3 :框體 44 :透鏡 4 5 :線狀偵測器 4 6 :偵測基板 47 :連接器 4 8 :原稿支撐台1311881 • (1) , IX. Description of the Invention [Technical Fields of the Invention] The present invention relates to a linear illumination device used by an image reading device such as an image scanner, a facsimile machine or a photocopier, and particularly relates to: A linear illumination device used in an image detection system that illuminates a reading surface of an original and reads the reflected light, and an image reading device using the same. Φ [Prior Art] From the past, image detectors used in image reading devices such as image scanners, facsimile machines, and photocopiers are classified into a compact type, a compact type, and the like. Among them, a close-type image detector (hereinafter abbreviated as CIS) is composed of an illumination device, a magnification imaging optical device, a line detector, and the like. On the other hand, like this CIS, in general, since the optical path length is shorter than that of the image detector using the reduced optical system, the machine equipped with such an image detector has a feature of being easy to miniaturize. In this way, the CIS is easily assembled into the inside of the machine, and thus the optical system is gradually replaced, and is often used in a thin flat type image reading device. A linear illumination device such as that used in CIS is required to be able to illuminate the original surface with an illumination of more than necessary ‘and to reflect the reflected light from the original at a sufficient intensity to the linear detector. Fig. 4 is a cross-sectional view showing a conventional close-type image detector showing a case where the number of the light guides 42 is one. The close-type image detector has a light source for illuminating the original, and transmits the reflected light from the original 49 through the lens 44 in the form of a photoelectric conversion element (CCD) 1311811 (2) " The light receiving unit receives and converts to an electrical signal. In the same figure, 43 is a frame supporting the constituent members, and 44 is a lens array for imaging the optical image of the original 49 on the line detector 45. The 45-series is a linear detector having a plurality of light-receiving portions for photoelectrically converting an optical image of the original 49 into an electric signal and arranged in a line. The 4 6 is a detection substrate on which the linear detector 45 is mounted. 4 1 r, 4 1 g, and 4 1 b are light sources each having an LED (light-emitting φ diode) that illuminates the original 49, and are disposed on one side of the light guide 42 extending in the longitudinal direction. End face. The light source unit 41 is provided with the incident light guided by the LEDs 41r' 41g' 41b, and is designed to illuminate the entire length of one of the linear detectors 45 and the amount of light is slightly The uniform light guide 42 is a connector for connecting the detector signal to an external device, and the 48 is a document support table made of transparent glass for supporting the original 49. The light emitted by the LED disposed on the end surface of the light guide body 42 is guided by the light guide body 42 made of acryl, and is internally reflected on the inside of the light guide body 42 by the exit surface (light exit portion). ) is emitted to the outside and illuminates the original 49. For the purpose of assisting reflection in the light guide body, it is preferable that titanium oxide or aluminum foil powder can be disposed as printing or the like at the reflection portion and the end portion (opposite side of the light incident surface) of the light guide body 4 2 . means. As the linear illumination device, a linear illumination device in which a light-emitting diode is provided at one end portion (light entrance portion) of a rod-shaped transparent body (light guide) made of acryl is used. (For details, please refer to Japanese Patent Laid-Open Publication No. 2693098 (3) No. 1311881, Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. The light-emitting diode LED is disposed only at one end of the rod-shaped transparent body (light guide), and the cost is reduced. Furthermore, the shape of the light guide body is made such that it can obtain a uniform illuminance along the longitudinal direction of the light guide body, and the light from the LED can be made from the light guide body that is incident thereon. The light-incident surface is configured to be able to obtain a uniform illuminance as far as possible toward the terminal portion. However, in the past examples of the above, there are the following problems. First, a description will be given of one of the cross-sectional shapes of the conventional linear illumination device described in Japanese Laid-Open Patent Publication No. Hei No. 10-241432, the entire disclosure of which is incorporated herein by reference. The arrows in the figure indicate the direction of the light. In FIG. 5A, the light guided by the light incident surface enters the light guiding portion 5〇1 which is slightly perpendicular to the drawing surface, and the light emitting portion 502 which emits the light is arranged as 500. A wedge-shaped protrusion as shown. In this configuration, there is a large amount of light 510 returned to the light guiding portion 501 by the light exit portion 502. Further, the light 511 advanced from the light guiding portion 501 to the light exit portion 502 is also emitted in a direction different from the predetermined direction. Therefore, these lights cannot be effective illumination light. As a result, the amount of illumination light is insufficient, and the amount of illumination light cannot be increased. Further, in Fig. 5A, as shown by Figs. 500 and 503, two wedge-shaped projections are arranged. With respect to these shapes, the same reflected light 512 reflected by the bottom surface 521 of the light guiding portion 501 side enters the light exiting portion 502, and emits light in a direction unrelated to illumination of the original. Further, in the opposite direction 'J - 1311881 ' (4) ', the light-emitting portion 502 is reflected from the bottom surface 5 2 2 on the side of the light-emitting portion 5 Ο 2, and is returned to the light guiding portion 5 Ο 1 . Therefore, the light is changed to cause a problem that the amount of illumination of the original is reduced. [Summary of the Invention] [The Summary of the Invention] The object of the present invention is to solve such a past problem: φ The feature of the present invention is that it is dense Image-type image detection: A linear illumination device that can emit illumination light from a linear illumination device while also illuminating along the length of the light guide. Further, the present invention is characterized in that it provides an effective read length M-iz device which can improve the illumination characteristics and further extend the light guide. The present invention includes: a φ light source; the light guide body ???the light guide body is provided with: a light source from a front surface of the transparent medium is incident on the light incident surface, and the light is incident on the long light guide portion; The light-emitting portion first and second projections of the light-emitting surface on which the longitudinal direction of the light guide portion is guided by the front light guide portion are controlled by the light amount of the light portion of the light guide portion, and between the light guide portion and the light-emitting portion. The length direction 'is arranged in pairs with each other. Then note that the protrusions are wedge-shaped, and their height is reflected by the light reflected in the front, and the light will not be emitted. In the unit, the distribution of the illuminance is more uniform and the linear illumination of the illuminance is used to illuminate the light from the direction of the light guide, and the light is guided to the light guide. The surface distance -7-(5) 1311881 changes, and the first angle formed by the side wall of the light guiding portion facing the bottom surface of the light guiding portion side before the second protrusion is recorded, and the side wall of the light portion is recorded before the second protrusion. The second angle formed by the bottom surface of the light portion side is large. Further, the pre-recording light guide further includes: a height from the front surface to the front side in the longitudinal direction, a height of the second protrusion which is described earlier, and a first region which continuously increases; and a first region which continues the first region, and the second projection of the foregoing The height is slightly fixed in the second area. Further, the pre-recording light guiding system includes: a height from the front surface to the front side in the longitudinal direction, and a height of the second protrusion which is described above is a first region which is continuously increased; a first region which continues before the second region, and a second projection which is described above The second region having a certain height is slightly constant; and the second region continuing from the front to the end portion, and the height of the second projection described above is a third region which is continuously reduced. [Effect of the Invention] According to the present invention, not only the illuminance of the linear illumination device but also the illuminance distribution can be more uniform. Moreover, since the illuminance distribution of the emitted illumination light is uniform in the vicinity of the light incident portion of the light guide body, a longer effective length of the light guide body can be obtained, and unnecessary use space can be reduced. The actual assembly of the product also has the advantage of being miniaturizable. Further, even if the arrangement position of the LEDs differs depending on the light guide body, the influence of the contrast distribution is small, so that it is easier to adjust the height adjustment project in the LED installation project. -8- (6) 1311881 [Embodiment] BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the embodiments suitable for the present invention will be described in detail with reference to the drawings. Further, the following embodiments are not limited to the present invention which is within the scope of the patent application, and the group α' of the features described in the present embodiment is not necessarily all necessary as a means for solving the present invention. # The light guide body of the linear illumination device of the present embodiment is basically the same shape as the light guide body shown in FIG. 4, but is characterized in that: between the light guide portion and the light exit portion, instead of the wedge The protrusion of the shape is a protrusion structure having a rectangular shape. In this way, in the present embodiment, in addition to the old linear illumination device, a new one is added to control the amount of emitted light in the vicinity of the light guiding portion and/or in the vicinity of the light exit portion. structure. [Embodiment] FIG. 1A and 1B show an example of a linear lighting device according to a first embodiment of the present invention. Fig. 1A is a cross-sectional view showing a portion of the linear illumination device of the first embodiment, which is slightly centered in the longitudinal direction of the light guide body 00. The light guiding body 100 is roughly divided into a light guiding portion 101 and a light exit portion 102 along its length direction. An LED 1 20 as a light source is disposed in the vicinity of an end surface (hereinafter, referred to as a light incident surface) 1 (Fig. 1B) of at least one side of the light guiding surface 100. The light guiding unit 101 receives the light emitted from the LED 120 disposed near the outer side of the light incident surface 1 1 0, and has a light that is transmitted to the guide 1311881. (7) . Light section 1 〇〇 At the same time as the length direction, the light is directed to the light exiting portion 102. The light-emitting portion 1 emits light in a direction in which light is received from the light guiding portion 1 〇 1 and a part of the light-emitting portion 102 is provided. Thereby, the object to be read of the original is marked. The light guide body 100 shown in FIG. 1A is formed between the light guiding portion π light portion 102, and has a rectangular structure with a certain height|103, and further, at a position facing the protrusion 103. A wedge-shaped projection 1 (hereinafter, abbreviated as a wedge). This method of using the 03 and the wedges 104 to achieve the effect of the light amount adjustment is common to the old ideas. However, in the first embodiment, by the shape of the cross section of the projection 103, the light transmission between the portion 1 〇 1 and the light exit portion 102 can be more effectively controlled. Further, off 1 0 4, the amount of light entering the > 102 can be controlled by changing the height of the wedge portion 104 in accordance with the distance from the light in the longitudinal direction of the light guide body 100. Specifically, the height of the wedge portion 104 is the highest at the center in the longitudinal direction of the light body 1 ,, and the height at the light incident end portion is lowered. Further, with respect to the projection 1 0 3 , the angle of the lower surface of the opposing portion 102 (preferably an acute angle) is smaller than the angle of the bottom surface on the side of the opposing portion 1 〇 1 . Fig. 1B is a diagram showing the entirety of the light guide body 100. The light guide body 100 is formed of a transparent medium, and the protrusion is formed in the same shape from the light incident surface 1] 0 toward the end portion, and the protrusions are formed by the protrusions 1 and the protrusions as defined. By means of the protrusion, the system and the light guide between the light source and the source of the wedge are connected to the guide surface and finally emit light in the light guide squint 103, the wedge portion-10-(8) 1311881 1 〇4 is The height is lower near the both ends; and the height is formed in the most cylindrical shape near the center. Fig. 2 is a cross-sectional view of the light guide 100 for explaining the function of the projection 1 〇 3. In Fig. 2, the light-emitting surface side of the protrusion 103 has a wall surface having a longitudinal angle as compared with the conventional example shown in Figs. 5A and 5B. By this, it is possible to block the light 201 that directly advances from the light guiding portion 110 at a low angle toward the light exit portion 102, and also has the light 202 that is returned from the light exit portion 〇2 to the light guiding portion 101. The effect of occlusion. In this manner, by the first bottom surface 2 1.0 belonging to the light guiding portion 1〇1 and the second bottom surface 211 belonging to the light exiting portion 1〇2, it is possible to reduce the degree of entering the light exiting portion 1〇2 once and return to the light emitting unit 1〇2 again. The light of the light guiding portion 101 can also be used more efficiently by the light entering the light exiting portion 102 from the light guiding portion 1〇1, so that the original can be enlarged as compared with the conventional example. Illumination. Fig. 3 is a view for explaining the illuminance distribution in the longitudinal direction of the illumination device pertaining to the present embodiment. In FIG. 3, the LED ' as a light source is disposed on the light incident surface side, that is, the left side of FIG. 3, and the vertical axis indicates that the length direction of the light guide body is at the illumination position of the original document. Relative amount of illumination. Further, the horizontal axis indicates the distance (in mm) from the incident surface 1 1 0. In Fig. 3, the 'line not marked as 300' indicates the illuminance characteristic of the illumination device belonging to the embodiment; the line marked as 3 0 1 indicates that the profile is shown in Fig. 5B. The illuminance characteristics of the old lighting device. # In the old lighting device, 'the -11 - 1311881 ' Ο ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' It is presumed that the reason is that a part of the light emitted from the light source (LED) directly enters the light exiting portion 1〇2 in the vicinity of the light incident surface 1 1 ,, so that the amount of light in the vicinity of the light incident surface is increased. On the other hand, in the illumination device according to the first embodiment of the present invention, it can be seen that the above tendency can be alleviated, and almost uniform illumination can be obtained in the entire longitudinal direction of the light guide 100. [Second Embodiment] Here, as a more detailed observation of Fig. 3 showing the illumination characteristics of the illumination device according to the first embodiment, it can be known that the distance from the light incident surface is about 1 5 mm. There is a region with low illumination: in addition, about 1 〇mm from the terminal end, there is also an area where the illuminance is further reduced. It is presumed that this is because the direct light from the light source 120 always enters the central portion of the light guide body 100. Therefore, in the vicinity of the light incident surface 110, the light φ is diffused to cause less light to reach the light exit portion 102. . On the other hand, in the old lighting device, the peak of the illuminance can be obtained within a range of 20 to 50 mm from the light surface. It can be inferred that the reason is that the light that directly reaches the light exiting portion 502 from the light source is also added. In contrast, since the illuminance is reduced in the vicinity of the entrance end of the light incident surface of the illumination device, the original document cannot be read near the extreme end of the light incident surface. Further, similarly, in the end portion on the opposite side of the light incident surface, the portion having a reduced illuminance is also present within a range of a few centimeters from the end portion. Therefore, it is required to shorten the length of the illuminance reduction portion and reduce the uselessness. -12 - 1311881 • (10) 'The illuminance characteristics like this will vary slightly depending on the color. Now, in many c IS, LEDs of red, green, and blue are used. These LEDs are arranged side by side in the horizontal direction at the vicinity of the light incident surface of the light guide body as shown in Fig. 4 . Therefore, the position of the LED that is disposed farther away from the light-emitting portion tends to have a lower illuminance starting characteristic. As a result, not only the uniformity of the illuminance near the light entrance portion but also the chromaticity characteristic of the light exit portion is reduced. φ Also, the portion where the illuminance is reduced as such cannot be used to read the original, so that both ends of the CIS cannot be used and become useless. Therefore, how to make the entire area an effective area when the illuminating device is maintained in a small size becomes a problem to be required. Therefore, in the second embodiment, in order to improve the problem of low illuminance in the vicinity of the light incident portion, the height of the projection 103 is reduced in the vicinity of the extreme end of the light incident surface, and the direct light from the light source 120 is blocked in the past. Part of it can be introduced into the light-emitting part 1 〇2 and used as illumination light. In this way, φ has a feature of reducing the area of the illuminance near the light entrance surface. Fig. 6 is a perspective view of a light guide body 10 0a according to a second embodiment of the present invention. This light guide body l〇〇a' is obtained by molding a propylene material into a shape as shown in Fig. 6. The light guide body 100a is the same as the first embodiment described above, and is characterized in that the elongated shape 'has therein is provided with a light guiding portion 1 〇1 for guiding light emitted from the light source 120 to the longitudinal direction; and the emission will be The light-emitting portion of the illumination light that is illuminated by the original is 1 0 2 . In the same manner as in the first embodiment, the light guide portion 1 0 1 and the light exit portion 1 〇 2 are separated, and the wedge portion 1 Ο 4 and the protrusion 1 as shown in Fig. 6 - 1311881 (11) ' are formed. Ο 3. The shape of the protrusions 103 includes a first protrusion region 601 whose height gradually increases from the longitudinal direction of the light guide body i〇〇a to a distance of about 5.5 mm from the light incident surface 1 10; Thereafter, the shape is a second projection region 602 that maintains a constant height up to the end portion. The feature is that the height of the protrusion 103 and the wedge portion 104 is in a region of about 5.5 mm from the light incident surface 110, and the height is approximately zero (height = 〇) φ, and the direction toward the terminal portion is The height is gradually increased. When the first protrusion region 601 enters the second protrusion region 602, the height of the protrusion 103 is, for example, a constant height as in the first embodiment described above. The direct light including the light guiding portion 120 and the light from the bottom surface of the light guiding portion 100a are designed such that more light can be transmitted from the light guiding portion 101 to the light exit portion 102. In this way, it is necessary to remedy the low illumination near the entrance surface 11〇. In the vicinity of the light incident surface 110, there is light which is directly entered into the light exiting portion 1〇2 by the LED 120, and in the past, in order to prevent the use of the direct light as much as possible, a projection or the like is formed to block it. On the other hand, in the second embodiment, the illuminance near the light incident surface 110 is successfully improved by using the direct light from the light source 120. On the other hand, in the portion which is longer from the light incident surface 110, the amount of light is adjusted by increasing the height of the protrusion 103 and changing the height of the wedge portion 1〇4 according to the distance thereof. . Thereby, the amount of light reaching the light exiting portion 102 is adjusted so that the illuminance energy in the longitudinal direction of the light guiding body 10a becomes uniform. -14 - 1311881 • (12) ' As a result of improving the illuminance near the light incident surface 11 藉 by the light guide i 〇〇 a of the second embodiment, a description will be given with reference to Fig. 9 . Fig. 9' is a view showing the illuminance starting characteristics of the illumination device of the second and second embodiments of the present invention in the vicinity of the light incident surface. In the figure, the '900 series shows the results obtained by the first embodiment; 90! shows the results obtained by the second embodiment. In Fig. 9, although the illuminance in the vicinity of the light surface is indicated with respect to 値, φ, it can be known that in the second embodiment, compared with the first embodiment, the illuminance is near the distance of about 4 mm from the light incident surface. The start is better. From this, it can be known that the effective length of the light guide body capable of effectively illuminating the original document is further increased. [In contrast, the light guide body corresponding to a certain width of the original document can be effectively increased. Length to reduce the length of the light guide itself. Further, from the shape of the light guide i〇〇a of the second embodiment, it is further known that it has the following new effects. Fig. 〇 is a display showing the illuminance distribution when the assembly positions of the LEDs are different in the illumination device according to the first embodiment of the present invention. In the light guide 100 shown in the first embodiment, when the arrangement position of the LEDs 1 2 0 disposed on the light-incident surface 1 1 side thereof is shifted in the longitudinal direction, the entire light guide 100 is provided. The illuminance distribution in the length direction will be different. Especially in the area close to the light-incident surface 110, it can be known that even if the assembly position of the LED 120 is only slightly different, there is a large illuminance change. Therefore, in the illumination device of the first embodiment, in the manufacturing process Need to be careful -15- (13) 1311881 Adjust the assembly height position of LED 1 20, which makes the manufacturing process very complicated. Fig. 11 is a view showing the illuminance distribution of the illuminating device according to the second embodiment of the present invention when the assembly positions of the LEDs are different. In Fig. 11, there is shown an illuminance distribution characteristic in the longitudinal direction when the assembly positions of the LEDs are different. According to this, even if the assembly position of the LED is different, there is no change in illumination. Therefore, in the manufacturing process, the position adjustment of the LED becomes simple, and in addition to the difference in the illuminance distribution of the product, the manufacturing engineering time can also be shortened. [Embodiment 3] In the third embodiment, in addition to the light surface 1 1 ,, a structure in which the height of the protrusion 030 in the vicinity of the terminal portion is changed stepwise is added. Figure 7 shows its details. Fig. 7 is a perspective view showing a light guiding body 10b of a lighting device according to a third embodiment of the present invention. In the third embodiment, the shape of the protrusion 103 along the longitudinal direction of the light guide body 1b is as shown in Fig. 7, and is characterized in that the height of the protrusion from the light incident surface 110 is gradually increased. The protrusion area 701 of 1 and the second groove area 702 in which the protrusion 103 of constant height is formed, and the 3rd groove area 703 which gradually becomes lower by the protrusion 010 about 6 mm from the terminal part are added. Further, the shape of the wedge portion 104 is the same as that of the foregoing first embodiment and the second embodiment. Further, a reflection member made of aluminum or the like -16-1311881 (14) - is disposed at the end portion of the light guide body 100b to enhance the reflection efficiency of light from the light source 120. As a result, the configuration similar to that in which the light source is disposed in the terminal portion is relaxed, and the illuminance in the vicinity of the terminal portion tends to be lowered. Therefore, it is possible to reduce the portion where the illuminance near the terminal portion is lowered. As a result, the effective length of the light guide body capable of giving the effective illuminance is made longer, and the area which cannot be used by the illuminance can be shortened. Thereby, since the length of the illumination device that irradiates the original of a certain length can be shortened, the width of the image reading device can be shortened by the same φ length. Further, in the first and second embodiments described above, a reflection member made of aluminum or the like may be disposed at the end portion of the light guide body 1b. [Embodiment 4] A description will be given of a flat type image scanner using the illumination device of the present embodiment. Fig. 8 is a perspective view showing an image reading apparatus of an example of φ applied to one of the image scanners of the embodiment of the present invention. Here is an example of a flatbed image scanner using a compact image detector. In Fig. 8, '8.1 is provided with the cIS of the illumination device of the present embodiment. 8 2 is a glass plate as a document support, 8 3 is a wire for operating the IC S 84 to drive the wire 83 to sweep the drive motor of the CIS, and 85 is a platen of the original. By driving the drive motor 84 to mechanically move the wire 83, the CIS 8 1 moves in the reading direction (scanning direction) and can read the image information of the original. The CI S is configured as a detection unit that is integrated into the illumination unit, and is configured as a detection unit, and the reflected light from the illuminated original is transmitted through a lens array (not shown) in the CIS. The light is collected to the photoelectric conversion element as one line of the image information and output. In this way, the image information of the sheet can be read and output. Since the image scanner "equipped with the CIS unit of the present embodiment can shorten the length of the illumination device, the width of the image scanner can be shortened, and the size of the image reading device can be reduced. % According to the embodiment as described above, the illuminance distribution of the linear illumination device can be increased, and the illumination distribution can be made more uniform. Further, since the illuminance distribution of the illumination light emitted in the vicinity of the light incident portion of the light guide body becomes uniform, a longer effective length of the light guide can be obtained. Thereby, unnecessary space can be reduced, and there is an advantage that the product can be miniaturized. Further, since the influence of the contrast distribution can be reduced by the deviation of the assembly position of the LEDs in accordance with the light guide body, the adjustment of the assembly position can be facilitated in the assembly process of the LED. The present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the invention, and the technical scope of the present invention should be construed as being within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 1B are a cross-sectional view and a perspective view of a linear illumination device according to a first embodiment of the present invention. Fig. 2 is a view showing the optical effect of the linear illumination device -18-(16) 1311881 belonging to the first embodiment. Fig. 3 is a view showing the illuminance distribution in the longitudinal direction of the linear illumination device in the first embodiment of the present invention. Figure 4 is a cross-sectional view showing the structure of an existing close-type image detector. Figure 5 A, 5 B is a cross-sectional view showing the old illuminating device with a wedge; and a display of the light illuminating line that is not ideal. Fig. 6 is a perspective view showing the structure of a lighting device according to a second embodiment of the present invention. Fig. 7 is a perspective view showing the structure of a lighting device according to a third embodiment of the present invention. Fig. 8 is a view showing an example of a flat type image reading apparatus using a lighting device according to an embodiment of the present invention. Fig. 9 is a view showing the illuminance starting characteristics of the illuminating device according to the first and second embodiments of the present invention in the vicinity of the light incident surface. Fig. 10 is a view showing the illuminance distribution when the assembly positions of the LEDs are different in the illumination device according to the first embodiment of the present invention. Fig. 11 is a view showing the illuminance distribution of the illuminating device according to the second embodiment 2 of the present invention when the assembly positions of the LEDs are different. [Main component symbol description] 4 1 : Light source unit 41r, 41g, 41b: Light source -19- (17) 1311881 42 : Light guide body 4 3 : Frame 44: Lens 4 5 : Linear detector 4 6 : Detect Measuring substrate 47: connector 4 8 : original support table
4 9 :原稿 81: CIS4 9 : Original 81: CIS
8 2 :玻璃板 8 3 :導線 8 4 :驅動馬達 8 5 :壓板 1 00 :導光體 1 〇〇a :導光體 1 〇〇b :導光體 1 0 1 :導光部 1 0 2 :出光部 1 03 :突起 104 :楔部 1 1 〇 :入光面 120 : LED 5 0 0 :楔形狀的突起 5 0 1 :導光部 -20- (18) 1311881 5 02 ：出光部 5 0 3 :楔形狀的突起 510:自502回到501的光 511:自501前進至502的光 512:由底面521的反射光 52 1 :底面 522 :底面8 2 : glass plate 8 3 : wire 8 4 : drive motor 8 5 : platen 1 00 : light guide 1 〇〇 a : light guide 1 〇〇 b : light guide 1 0 1 : light guide 1 0 2 : Light-emitting portion 101: Projection 104: Wedge portion 1 1 〇: Light-incident surface 120: LED 5 0 0: Wedge-shaped protrusion 5 0 1 : Light guide portion -20- (18) 1311881 5 02 : Light-emitting portion 5 0 3: wedge-shaped protrusion 510: light 511 returning from 502 to 501: light 512 advancing from 501 to 502: reflected light 521 from bottom surface 521: bottom surface 522: bottom surface
601 :第1的突起區域 602:第2的突起區域 7 0 1 :第1的突起區域 702 :第2的溝區域 7 0 3 :第3的溝區域 900 :第1實施例所得之結果 901 :第2實施例所得之結果601: the first protrusion region 602: the second protrusion region 7 0 1 : the first protrusion region 702: the second groove region 7 0 3 : the third groove region 900: the result of the first embodiment 901 : Results obtained in the second embodiment
-21 --twenty one -