201227014 六、發明說明： - 【發明所屬之技術領域】 \ 本發明係與一種接觸式影像感測器(contact image sensor, CIS)有關，特 別係與一種接觸式影像感測器的導光系統有關。 【先前技術】 接觸式影像感測器一般用於掃描器、傳真機及影印機等光電產品中， 是一種常見的影像感測器。請參考第1圖，第1圖為習知的接觸式影像感 Φ 測器之剖面圖。習知的接觸式影像感測器主要由發光二極體(light emitting diode，LED)陣列1、導光元件2、及感光單元陣列3整合在一條狀方型盒4 内構成。進行掃描文件時，發光二極體陣列丨作為光源將光線照射到文件 10上，入射光線經由文件1〇反射後，反射光通過多個反射鏡5傳送至感光 單元陣列3，藉由處理感光單元陣列3所產生電流信號，即可得到文件1〇 掃瞄後的圖像資訊。 如第1圖所示’發光二極體陣列1中的每-顆LED均可視為一光源， 籲因此，多數個沿垂直剖面排列的LED會使得該文件1〇受照射時在垂直 J面方向上有光力佈不法均勻的問題。而上述的導光元件2雖然能對每一 顆LED所發出的光線進行擴散導光，但是，仍無法有效解決在垂直剖面方 向上光刀佈不均勻的問題…旦該文件ι〇受照的光分佈不均勾時，將會該 文件10掃&錢得的畫面在#直伽純上丨__隔之肢，使得掃 描品質不佳。 因此’有人提出了更轉光元件2的設計，用贿善光分佈不均句的 問題。台灣專利1315379 揭露了在導光7C件之一面做出密集的齒狀反射面， 201227014 透過齒狀反射面將光朝均勻方向擴散，藉此改善不均勻的問題。但此設計 將無法有效利用LED側向發出之光，使得光學利用率不佳，並且非對稱的 結構亦造成出光的不均。 【發明内容】 有鑑於此，本發明之目的在於提供一種用於接觸式影像感測器的導光 元件，其_在-丨裝及/或人射面上形成概錄結構，除可以將光線 朝均勻方向紐’同時增加光利用率，一次解決上述問題。 本發明之另-目的在於提供—種具有上述導光元件的高_度高亮度 光源模組，其提供固定該導光元件在發光二極體燈條上的固定件，透過該 固定件反射發光二極體的側向光，以增加光利用率。 為達上述之目的’本發料-實施例提供__種麟接觸式影像感測器 的導光7G件’用以導入一發光二極體燈條所發出之光線，該導光元件包括 一長條型人射面及—第—出射面。該長條型人射面對應設置於該發光二極 體燈條之上。該第一出射面在該長條型入射面之一長邊與該長條型入射面 夹一第-銳角，其中該第一出射面具有複數個微結構。 在第一較佳實施例的另一實施樣態十，該導光元件進一步包括一第二 出射面，與該長條型人射面之另—長邊夾一第二銳角，其中該第二出射面 具有該些微結構。具體來說，該些微結構係垂直該長邊排列的菱鏡結構， 或是選自金字塔型、微透鏡、柱狀、規則及不規則結構所組成群組之-。 另外本發明還提供一種具有上述導光元件的高均勻度高亮度光源模 組，包括一發光二極體燈條、上述的導光元件及一固定件。該發光二極體 燈條用以發出光線吐述的縣元件用以導人該光線。該固定件用於固定 201227014 該導光元件在該發光二極體燈條上，並用以反射該光線。值得注意的是， . 該固定件為預定顏色塑料，用以反射該發光二極體的側向光，以增加光利 - 用率’可大幅降低該發光二極體燈條的使用功率。 本發明第二實施例還提供一種用於接觸式影像感測器的導光元件，用 以導^^一發光二極體燈條所發出之光線’該導光元件包括一長條型入射面 及一出射面。該長條型入射面與該發光二極體燈條之一短邊夾一銳角，其 中該長條型入射面具有複數個微結構。該出射面平行並相距於該長條型入 • 射面一距離。 在第二較佳實施例的另一實施樣態中，該出射面具有該些微結構。同 樣地’該些微結構係垂直該長邊排列的菱鏡結構，或是選自金字塔型、微 透鏡及柱狀、規則及不規則結構所組成群組之一。 另外，本發明第二實施例還提供一種具有上述導光元件的高均句度高 焭度光源模組，包括-發光二極體燈條、上述的導光元件及一固定件。該 發光-極體燈條用以發出光線。上述的導光元件用以導入該光線。該固定 參件用於固定該導光元件在該發光二極體燈條上，並用以反射該光線。值得 注意的是，顧定件為任意有色麵，肋反射該發光二極_側向光， 以增加光利用率’可大幅降低該發光二極體燈條的使用功率。 依據本發明之導光元件及具有鱗光元件之高均勻度高亮度光源模 組，其透過在-出射面及/或人射面上形成複數個德構，例如魏結構， .以職線朝均勾方向擴散，以解決發光二極體長邊方向上的光線不均勾的 問題，並且發光二極體的側向出光也透過固定件反射，做有效的利用，克 服習知技術光學利用率不佳的問題。 201227014 為讓本發明之上述内容能更明顯易懂，下文特舉較佳實施例，並配合 所附圖式’作詳細說明如下。 【實施方式】 以下將配合附圖來詳細說明本發明之導光元件的第1較佳實施例，其 中於不同圖式中相同的元件符號係代表示相同或相似的元件。請參照第2 圖，第2圖繪示本發日月第一較佳實施例之接觸式影像_器的剖面示意圖， 其中係以元件符號20來代表此較佳實施例之光源模組，元件符號2〇〇代表 此較佳實施例之導光元件。 該接觸式影像感測器包括高均勻度高亮度的光源模組2〇、感光單元陣 列3、條狀方型盒4、多個反射鏡5、透光板9。進行掃描文件ι〇時，光源 模組20絲線騎敎件1G上，人射规_文件1()反職反射光通 過多個反射鏡5傳送至感光單元陣列3,藉由處理感光單元陣列3所產生電 流信號，即可得到文件1〇掃瞄後的圖像資訊。 請參照第3圖’第3圖係第2圖中之光源模組2〇的剖面放大圖，該光 源模組20包括一發光二極體(LED)燈條22、一導光元件2〇〇及一固定件％。 u LED燈條22包含-長條型基板222及裝設於該長條型基板222上的複 數顆LED晶粒(die)224，用以發出光線。 該導光元件2〇0用以導入該LED燈條22所發出之光線，以將從咖 b曰粒224所發出之光線（本領域稱一次光學），經過該導光元件2⑽（二次 光學）傳輸到該文件10處。具體地說，該導光元件之材質是一種透光 的光學塑料’例如為聚f基丙騎f g|(PMMA)、聚碳義㈣或聚對苯二 甲乙自曰(PET)荨。該固疋件24用於固定該導光元件2〇〇在該led燈條22 201227014 上’並且還_反機规。值躲意的是，_定件24概為一預定顏 色塑料、如白色或其他顏色，可用以反射該些LED晶粒㈣似的側向光， 以增加光棚率，可大幅降低該LED燈條22的使用功率。 該導光元件200包括-長條型入射面22〇及一第一出射面24〇。需注意 的是’該長條型入射面220及該第一出射面⑽皆為垂直紙面延伸之碰 型。錄條型入射面220對應設置於該咖燈條22之上，以將從咖晶 粒從所發出之光線從該長條型入射面22〇進入該導光元件。 在第-實施例中’該第-出射面24〇在該長條型入射面22〇之—長邊 迦與該長條型入射謂失一第一銳角&，即⑽、㈣度，使得該光 線可從該第-出射面發出。第一銳角㊀丨角較佳地可為Μ度，或因應 其他設計所需之角度皆可實施。 請參照第3 ®及第4圖’第4 _第3圖中之導光元件的立體圖。 乂第出射面240具有複數個微結構。在此較佳實施例中，該些微結構係 垂直純邊迦排列的菱鏡結構，使得導入鱗光元件之光線可透過 «玄二菱鏡結構朝該長邊纖方向折射出來，使得咖晶粒以發出之光 ’在/長邊2202方向混合的較均勻。然而，本發明並不限於以菱鏡結構方 式實施該第一出射面24〇之微結構亦可選自金字塔型(咖响）、微透鏡 Crmerclem) '餘(lemieulai>)、規軌錢則結制組麟組之一。 參…、第5圖’第5圖為第—較佳實施例的導件的另一實施 樣態在第-較佳實施例的另一實施樣態中，該導光元件進一步包括 一第一出射面260。兮笛-山6丄τ 弟—出射面260與該長條型入射面220之另一長邊 2204夾一第二銳角㊀ 尸㊀2小於90度，使得該光線（如虛線箭頭所示） 201227014 可同時從該第-出射面24G及該第二出射面26G發出，達到分光的效果。 利用此設計可舰光線分為兩道*同方向之光，可藉著配置抑的反光鏡 收集該二分光，以增加光的利用率。同樣地，第二銳角θ2較佳地可為p 度，或因應其他設計所需之角度皆可實施。 請參考第6圖，第6圖為第5圖之立體爆炸圖。同樣地，該第二出射 面260具有該些微結構。具體來說，該些微結構係垂直該長邊迦及施 排列的菱鏡結構’使得導入該導光元件2()() <光線可透過該些菱鏡結構朝 該長邊迦方向折射出來，使得咖晶粒似發出之光線在該長邊繼 方向混合的較均勻，而，本發明並不限誠菱鏡結構方式實施，該第二 出射面240之機構亦可選自金字·、錢鏡、柱狀、酬及不規則結 構所組成群組之一。 以下將詳細說明本發明第二較佳實施例之用於接觸式影像感測器的導 光元件。請參照第7圖，第7 _本發„二較佳實施例之光源模組的立 體爆炸圖，其中係以元件符號4〇來代表此較佳實施例之高均句度高亮度的 光源模組。同樣地，該光源模組4〇包括-LED燈條22、一導光元件· 及-固定件24。該LED燈條22包含一長條録板222及裝設於該長條型 基板222的複數顆LED晶粒(die)224，用以發出光線。 該導光兀件400用以導入—咖燈條22所發出之光線201227014 VI. Description of the invention: - [Technical field to which the invention pertains] \ The invention relates to a contact image sensor (CIS), in particular to a light guiding system of a contact image sensor . [Prior Art] Contact image sensors are generally used in optoelectronic products such as scanners, facsimile machines and photocopiers, and are a common image sensor. Please refer to Fig. 1, which is a cross-sectional view of a conventional contact image sensing device. A conventional contact image sensor is mainly composed of a light emitting diode (LED) array 1, a light guiding element 2, and a photosensitive cell array 3 integrated in a strip shape box 4. When the document is scanned, the light emitting diode array 丨 is used as a light source to illuminate the light onto the document 10. After the incident light is reflected by the file 1 反射, the reflected light is transmitted to the photosensitive unit array 3 through the plurality of mirrors 5, and the photosensitive unit is processed by the photosensitive unit. The current signal generated by the array 3 can obtain the image information after the file scan. As shown in Fig. 1, each LED in the LED array 1 can be regarded as a light source. Therefore, most of the LEDs arranged along the vertical section will cause the document to be illuminated in the vertical J plane. There is a problem that the light cloth is not uniform. Although the above-mentioned light guiding element 2 can diffuse and guide the light emitted by each LED, the problem that the optical knife cloth is uneven in the vertical cross-section direction cannot be effectively solved. When the distribution is uneven, the file will be scanned and the money will be displayed on the #直伽纯丨__ limb, making the scan quality poor. Therefore, some people have proposed the design of a more light-converting element 2, which uses a bribe to distribute unevenness. Taiwan Patent No. 1315379 discloses that a dense tooth-shaped reflecting surface is formed on one side of the light guiding 7C member, and 201227014 diffuses the light in a uniform direction through the toothed reflecting surface, thereby improving the problem of unevenness. However, this design will not be able to effectively utilize the lateral light emitted by the LED, resulting in poor optical utilization, and the asymmetric structure also causes uneven illumination. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a light guiding element for a contact image sensor, which has an overview structure on the armor and/or the human face, except for the light. Simultaneously increase the light utilization rate toward the uniform direction, and solve the above problem once. Another object of the present invention is to provide a high-degree high-brightness light source module having the above-mentioned light guiding element, which provides a fixing member for fixing the light guiding element on the light-emitting diode light strip, and reflecting light through the fixing member Lateral light from the diode to increase light utilization. For the purpose of the present invention, the present invention provides a light guide 7G member for introducing a light-emitting diode light strip, the light guide member includes a light source. Long strip type human face and - first - exit surface. The elongated human face is disposed on the light-emitting diode strip. The first exit surface has a first acute angle between the long side of the elongated incident surface and the elongated incident surface, wherein the first exit surface has a plurality of microstructures. In another embodiment of the first preferred embodiment, the light guiding component further includes a second exit surface, and the other long side of the elongated human face is clipped by a second acute angle, wherein the second The exit face has the microstructures. Specifically, the microstructures are perpendicular to the long-side arrangement of the prism structure, or selected from the group consisting of pyramid, microlens, columnar, regular and irregular structures. In addition, the present invention further provides a high uniformity high brightness light source module having the above light guiding element, comprising a light emitting diode light strip, the light guiding element and a fixing member. The light-emitting diode strip is used to emit light to the county element for guiding the light. The fixing member is used for fixing 201227014. The light guiding element is disposed on the light emitting diode strip and used to reflect the light. It is worth noting that the fixing member is a predetermined color plastic for reflecting the lateral light of the light emitting diode to increase the light utilization rate, which can greatly reduce the power consumption of the light emitting diode light strip. A second embodiment of the present invention further provides a light guiding element for a contact image sensor for guiding light emitted by a light emitting diode strip. The light guiding element includes a long incident surface. And an exit surface. The elongated incident surface is at an acute angle to one of the short sides of the light-emitting diode strip, wherein the elongated incident surface has a plurality of microstructures. The exit faces are parallel and spaced a distance from the elongated entry face. In another embodiment of the second preferred embodiment, the exit surface has the microstructures. Similarly, the microstructures are perpendicular to the long-side arrangement of the prism structure, or one selected from the group consisting of a pyramid type, a microlens and a columnar, a regular and an irregular structure. In addition, the second embodiment of the present invention further provides a high-equal-degree high-definition light source module having the above-mentioned light guiding element, comprising a light-emitting diode light bar, the above-mentioned light guiding element and a fixing member. The illuminating-pole light strip is used to emit light. The light guiding element described above is used to introduce the light. The fixing member is configured to fix the light guiding element on the light emitting diode strip and to reflect the light. It is worth noting that the stator is any colored surface, and the rib reflects the light-emitting diode-side light to increase the light utilization rate, which can greatly reduce the power consumption of the light-emitting diode strip. According to the light guiding element of the present invention and the high uniformity high brightness light source module having the squaring element, a plurality of structures, such as a Wei structure, are formed on the emitting surface and/or the human emitting surface, The problem is that the light is unevenly distributed in the direction of the long side of the light-emitting diode, and the lateral light of the light-emitting diode is also reflected by the fixing member, and is effectively utilized to overcome the optical utilization rate of the conventional technology. Poor question. In order to make the above description of the present invention more comprehensible, the preferred embodiments are described below, and are described in detail below with reference to the accompanying drawings. [Embodiment] Hereinafter, a first preferred embodiment of the light guiding element of the present invention will be described in detail with reference to the accompanying drawings, wherein the same reference numerals in the different drawings represent the same or similar elements. Referring to FIG. 2, FIG. 2 is a cross-sectional view showing the contact image device of the first preferred embodiment of the present invention. The component symbol 20 is used to represent the light source module of the preferred embodiment. The symbol 2A represents the light guiding element of the preferred embodiment. The contact image sensor comprises a high uniformity and high brightness light source module 2, a photosensitive unit array 3, a strip square box 4, a plurality of mirrors 5, and a light transmissive plate 9. When scanning the document ι〇, the light source module 20 is on the wire riding element 1G, and the human ray_file 1 () anti-reflection light is transmitted to the photosensitive unit array 3 through the plurality of mirrors 5, by processing the photosensitive unit array 3 The generated current signal can obtain the image information after the file is scanned. Please refer to the enlarged view of the light source module 2A in FIG. 3, which is a light-emitting diode (LED) light bar 22 and a light guiding element. And a fixed piece %. The LED strip 22 includes a long strip substrate 222 and a plurality of LED dies 224 mounted on the strip substrate 222 for emitting light. The light guiding element 2〇0 is used to introduce the light emitted by the LED light bar 22, and the light emitted from the coffee grain 224 (referred to as primary optical in the art) passes through the light guiding element 2 (10) (secondary optics) Transfer to the file 10. Specifically, the material of the light guiding member is a light transmissive optical plastic such as polyf-based propylene fg| (PMMA), polycarbide (tetra) or poly(p-phenylene bromide). The fixing member 24 is configured to fix the light guiding member 2 on the led light bar 22 201227014' and also to reverse the gauge. The value is that the _piece 24 is a predetermined color plastic, such as white or other colors, which can be used to reflect the lateral light of the LED dies (four) to increase the light shed rate and greatly reduce the LED light. The power used by strip 22. The light guiding element 200 includes a long strip type incident surface 22A and a first exit surface 24A. It should be noted that both the elongated incident surface 220 and the first exit surface (10) are perpendicular to the surface of the paper. The line-type incident surface 220 is disposed on the light bar 22 so as to enter the light guiding element from the emitted light from the elongated incident surface 22 into the light guiding element. In the first embodiment, the first exit surface 24 is at the long incident surface 22, and the long side is offset from the long incident by a first acute angle &, ie, (10), (four) degrees, The light can be emitted from the first exit surface. The first acute angle - the corner angle may preferably be a twist or may be implemented in accordance with the angle required for other designs. Please refer to the perspective view of the light guiding elements in the 3rd and 4th drawings of the 3rd and 4th drawings. The first exit surface 240 has a plurality of microstructures. In the preferred embodiment, the microstructures are arranged in a vertical prismatic arrangement, so that the light introduced into the scale element can be refracted through the "Xuan Erling mirror structure" toward the long side fiber, so that the crystal grain It is more uniform in the direction of the emitted light 'in the long side 2202'. However, the present invention is not limited to the implementation of the microstructure of the first exit surface 24〇 in a prismatic configuration, and may also be selected from the group consisting of a pyramid type, a microlens Crmerclem, a 'lemieulai> One of the group formations. 5, FIG. 5 is another embodiment of the guide of the first preferred embodiment. In another embodiment of the first preferred embodiment, the light guiding element further includes a first Exit surface 260.兮 - 山 山 山 山 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — 260 260 260 260 260 260 260 260 260 260 260 260 260 260 260 260 At the same time, it is emitted from the first exit surface 24G and the second exit surface 26G to achieve the effect of splitting. With this design, the ship's light can be divided into two channels of the same direction, and the dichotomy can be collected by the configured mirror to increase the utilization of light. Likewise, the second acute angle θ2 may preferably be p degrees or may be implemented in response to other designs. Please refer to Figure 6, which is a three-dimensional exploded view of Figure 5. Likewise, the second exit surface 260 has the microstructures. Specifically, the microstructures are perpendicular to the long side and the arranging structure of the arrangement is such that the light guiding element 2() is introduced into the light guiding element 2 to be refracted through the prism structure. Therefore, the light emitted by the coffee grains is more uniform in the direction of the long side. However, the present invention is not limited to the structure of the mirror, and the mechanism of the second exit surface 240 may also be selected from the golden characters and money. One of the groups consisting of mirrors, columns, rewards and irregular structures. Hereinafter, a light guiding element for a contact image sensor according to a second preferred embodiment of the present invention will be described in detail. Please refer to FIG. 7 , a perspective exploded view of the light source module of the second preferred embodiment, wherein the high-evenness and high-brightness light source mode of the preferred embodiment is represented by the component symbol 4 〇. Similarly, the light source module 4 includes an LED strip 22, a light guiding element, and a fixing member 24. The LED strip 22 includes a long strip 222 and is mounted on the strip substrate. a plurality of LED dies 224 for emitting light 222. The light guiding element 400 is used to introduce the light emitted by the light bar 22
，以將從LED b曰粒224所發出之光線（本領域稱—次光學），經過該導光元件(二次 光學）傳輸到該文件10處。該固定件％用於固定該導光元件在該咖 燈條22上’並且還用以反射該光線。值得注意的是，該固定件％為一預 疋顏色歸、如自色或其他親m觸些led晶粒㈣224的側向 201227014 光，以增加光利用率’可大幅降低該燈條22的使用功率。 - 該導光元件400包括一長條型入射面420及-出射面440。該長條型入 ；射面420與該LED燈條22之一短邊2206夾-銳角”即φ小於9〇度， 該出射面440平行並相距於該長條型入射面42〇 —距離。該銳角讀佳地 可為45度’或因應其他設計所需之角度皆可實施。該長條型入射面具 有複數個微結構。在此較佳實施例中，該些微結構係垂直該LED燈條22 之該長邊施排列的魏結構’使得該光線可從該些魏結構折射進入該 •導光元件4〇0,再從該出射1發出，使得LED晶粒224發出之光線在 該長邊2202彳向混合的較均勻。然:而，本發明並;^限於以菱鏡結構方式實 施，該第一出射面240之微結構亦可選自金字塔型(pyramid)、微透鏡 (microlens)、柱狀(lenticular)、規則及不規則結構所組成群組之一。 請參照第8圖，第8圖為第二較佳實施例之光源模組4〇另一實施樣態 的立體爆炸圖，其中係以元件符號500來代表此實施樣態之導光元件。在 第二較佳實施例的另一實施樣態中，同樣地，該導光元件5⑻包括一長條 鲁型入射面52〇及一出射面540。該出射面540與前一實施樣態之出射面44〇 不同的是’該出射面540同樣具有該些微結構。舉例來說，該些微結構係 垂直該LED燈條22之該長邊2202排列的菱鏡結構，使得該光線可從該些 菱鏡結構（即長條型入射面520)折射進入該導光元件4〇〇 (即二次光學）， 再從該出射面540的菱鏡結構折出來（即三次光學），使得led晶粒224 發出之光線在該長邊2202方向混合的更均勻、出光效率更好，可大幅降低 該發光二極體燈條的使用功率。然而，本發明並不限於以菱鏡結構方式實 施’該出射面540之微結構亦可選自金字塔型(Pyramid)、微透鏡 201227014 (microlens)、柱狀(lenticular)、規則及不規則結構所組成群組之一。The light emitted from the LED b granules 224 (referred to in the art as sub-optical) is transmitted to the document 10 via the light guiding element (secondary optics). The fixing member % is used to fix the light guiding member on the coffee light strip 22' and is also used to reflect the light. It is worth noting that the % of the fixing member is a pre-dial color, such as self-color or other pro-m touch to some of the led die (four) 224 lateral 201227014 light to increase the light utilization rate 'to greatly reduce the use of the light bar 22 power. - The light guiding element 400 comprises an elongated incident surface 420 and an exit surface 440. The elongated surface is formed; the emitting surface 420 is clipped with the short side 2206 of the LED light bar 22 by an acute angle, that is, φ is less than 9 degrees, and the exit surface 440 is parallel and spaced apart from the elongated incident surface 42〇-distance. The acute angle reading can preferably be 45 degrees ' or can be implemented at an angle required by other designs. The elongated incident surface has a plurality of microstructures. In the preferred embodiment, the microstructures are perpendicular to the LED light. The long side of the strip 22 is arranged such that the light can be refracted from the Wei structure into the light guiding element 4〇0, and then emitted from the exit 1 so that the light emitted by the LED die 224 is long. The edge 2202 is more uniform in mixing. However, the present invention is limited to being implemented in a prismatic structure, and the microstructure of the first exit surface 240 may also be selected from a pyramid type and a microlens. One of the groups of lenticular, regular, and irregular structures. Referring to FIG. 8, FIG. 8 is a perspective exploded view of another embodiment of the light source module 4 of the second preferred embodiment. Wherein the light-guiding element of this embodiment is represented by the component symbol 500. In the second preferred embodiment In another embodiment of the example, the light guiding element 5 (8) includes a long arc-shaped incident surface 52A and an exit surface 540. The exit surface 540 is different from the exit surface 44 of the previous embodiment. The exit surface 540 also has the microstructures. For example, the microstructures are perpendicular to the long side 2202 of the LED strip 22 so that the light can be from the mirror structure (ie, long). The strip-shaped incident surface 520) is refracted into the light guiding element 4 (ie, secondary optics), and then folded out from the prism structure of the exit surface 540 (ie, three times of optics), so that the light emitted by the LED die 224 is in the The mixing of the long side 2202 is more uniform and the light extraction efficiency is better, and the power consumption of the light emitting diode strip can be greatly reduced. However, the present invention is not limited to the implementation of the microstructure of the exit surface 540 by the prism structure. It may be selected from the group consisting of Pyramid, Microlens 201227014 (microlens), lenticular, regular and irregular structures.
依據本發明之導光元件及具有該導光元件之光源模組，其透過在一出 射面及/或入射面上形成複數個微結構，例如菱鏡結構，以將光線朝混光均 勻的方向擴散’以解決LED燈條長邊方向上的光線不均勻的問題，並且LED 的侧向出光也透過固定件反射，做有效的利用，克服習知技術光學利用率 不佳的問題。 雖然本發明已用較佳實施例揭露如上，然其並非用以限定本發明，本 發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍内， 當可作各種之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範 圍所界定者為準。 【圖式簡單說明】 第1圖為習知的接觸式影像感測器之剖面圖。 第2圖繪示本發明第一較佳實施例之接觸式影像感測器的剖面示意圖。 第3圖係第2圖中之光源模組的剖面放大圖。 第4圖係第3圖中之導光元件的立體圖。 第5圖為第一較佳實施例的導光元件的另一實施樣態。 第6圖為第5圖之立體爆炸圖。 第7圖係本發明第二較佳實施例之光源模組的立體爆炸圖。 第8圖為第二較佳實施例之光源模組另一實施樣態的立體爆炸圖 【主要元件符號說明】 1 發光—極體陣列 2 導光元件 3 感光單元陣列 4 條狀方型盒 201227014 5 反射鏡 9 透光板 10 文件 20 光源模組 22 發光二極體燈條 24 固定件 200 導光元件 220 長條型入射面 222 長條型基板 224 LED晶粒 240 第一出射面 260 第二出射面 400 導光元件 420 長條型入射面 440 出射面 500 導光元件 520 長條型入射面 540 出射面 2202 長邊 2204 另一長邊 2206 短邊 Θ! 第一銳角 θ2 第二銳角 Ψ 銳角 11According to the light guiding device of the present invention and the light source module having the light guiding element, a plurality of microstructures, such as a prism structure, are formed on an exit surface and/or an incident surface to uniformly direct the light toward the light mixing direction. Diffusion' solves the problem of uneven light in the direction of the long side of the LED strip, and the lateral light of the LED is also reflected by the fixing member, and is effectively utilized to overcome the problem of poor optical utilization of the conventional technology. While the present invention has been described above in terms of the preferred embodiments, the invention is not intended to be limited thereto, and the invention may be practiced otherwise without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view of a conventional contact image sensor. 2 is a cross-sectional view showing a contact image sensor according to a first preferred embodiment of the present invention. Fig. 3 is an enlarged cross-sectional view showing the light source module in Fig. 2. Fig. 4 is a perspective view of the light guiding element in Fig. 3. Fig. 5 is another embodiment of the light guiding element of the first preferred embodiment. Figure 6 is a perspective exploded view of Figure 5. Figure 7 is a perspective exploded view of a light source module according to a second preferred embodiment of the present invention. Figure 8 is a perspective exploded view of another embodiment of the light source module of the second preferred embodiment. [Main component symbol description] 1 Light-emitting body array 2 Light-guiding element 3 Photosensitive unit array 4 Strip-shaped square box 201227014 5 Mirror 9 Translucent plate 10 Document 20 Light source module 22 Light-emitting diode light bar 24 Fixing member 200 Light-guiding element 220 Long-shaped incident surface 222 Strip-shaped substrate 224 LED die 240 First exit face 260 Second Exit surface 400 light guiding element 420 elongated incident surface 440 exit surface 500 light guiding element 520 long strip type incident surface 540 exit surface 2202 long side 2204 another long side 2206 short side Θ! first acute angle θ2 second acute angle 锐 acute angle 11