200835965 九、發明說明： 【發明所屬之技術領域】 種應用於薄 本發明是有關於一種導光&，特別是指— 型化光學模組的導光板。 【先前技術】 參閱圖卜目前的-種導光板2G包括相反的—頂面2ι =-底面22,及-連接該頂、底面21、22之相對應邊的入 先面23’光束是自該人光面23射人該導光板2〇,且往遠 離於該入光面23的方向傳遞，並自該頂面21射出 板 20。 ^ 該導光板20在光學領域的應用極廣，參_ 2，即為 設置該導光板20的-背光模組⑽，該f光模組⑽還包 括依序疊置於該導光板2G之頂面21上的—擴散片⑻、二 增亮片咖及-保護片1G3、_疊置於該導光板2()之底面 22下的反射片104,及一設置於該導光板2〇之入光面幻 的光源10 5。 、由於为光杈組的發展趨勢是朝向薄型化邁進，直觀上 ’減小該導純2G的厚度（即該導光板2()的頂 '底面a 、22之間的距離），應是有助於該背光模组ι〇〇的薄型化， 然而’當該導光板20之厚度小於該光源1()5的發光面長度 時，部分光束將無法耦合入該導光板2〇，導致該導光板汕 的輕光效率下降，並呈線性衰減，且藉由模擬實驗，發現 該導光板20的厚度每下降（M毫米，輕光效率將; 18.57% 〇 牛 5 200835965 、，參閱圖3’為目前另一種侧視剖面呈楔形的導光板 ’亚設置於一背光模組1〇〇中，妙 …、句此種態樣的導光板 20在厚度降低的同時，亦產生耦光效率下降的缺失。 因此’在製造薄型化的背光模組同時，兼顧該導光板 2〇的耦光效率，儼然成為目前各界共同努力的目標。 【發明内容】 因此，本發明之目的，即在提供一種導光板，可應用 於製造薄型化的光學模組，且兼顧自身的耦光效率。 於是，本發明導光板是包含一板本體，及一耦光體。 該板本體包括相反的一頂面及一底面。 該耦光體是自該板本體一體延伸，並包括一遠離於該 板本體並供光束入射的入光面、一連接該入光面之頂邊與 該板本體之頂面的頂連接面，及一連接該入光面之底邊與 該板本體之底面的底連接面，該頂、底連接面之間的距離 不小於該板本體之頂、底面之間的距離，該入光面頂邊突 出於該板本體的頂面，且該頂連接面與該頂面共同形成彎 折的平面。 本發明的功效在於自該板本體一體延伸該轉光體，當 應用於一光學模組時，該光學模組的元件可疊置於該板本 體之頂面上’並藉由減小該板本體的厚度，達到薄型化該 光學模組，同時，利用該耦光體維持該導光板的耦光效率 〇 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 200835965 以下配合參考圖式之三個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖4,本發明導光板之第一較佳實施例包含一板本 體3，及一耦光體4。 該板本體3之侧視剖面是呈矩形，並包括相反的一頂 面31及一底面32 該耦光體4是自該板本體3 一體延伸，並包括一遠離 於該板本體3並供光束入射的入光面41、一連接該入光面 41之頂邊與該板本體3之頂面31的頂連接面42，及一連 接該入光面41之底邊與該板本體3之底面32的底連接面 43，該頂、底連接面42、43之間的距離不小於該板本體3 之頂、底面31、32之間的距離，該入光面41頂邊突出於 該板本體3的頂面31，且該頂連接面42與該頂面31共同 形成彎折的平面。 該頂連接面42具有一自該入光面41往該板本體3 方向延伸，且與該板本體3相間隔，並與該入光面41頂 ，於同一水平面上的第一頂面部421，及一連接該第一頂 邛421與該板本體3之頂面31，且向下傾斜的第二頂面 422。 ' 光束是自該入光面41射入該導光板，並往該板本體3 的方向傳遞，且自該板本體3的頂面31射出該導光板。 接著，參閱圖5,將該導光板應用於一光學模組，此例 7 200835965 中，該光學模組是以一昔#4 ^ 月九核組100為例說明。該背光模 組100還包括依序疊置於兮道 置於該導先板之板本體3的頂面31上 之一擴散片101、二增亮片102及 該板本體3的底面32下之反射片 面41的光源1〇5。 一保護片103、一疊置於 104，及一設置於該入光 為達到薄型化該背光模組1⑼，可藉由減小該板本體3 的厚度（即該板本體3_、底面31、32之_距離）， f 即可降低該背光模Μ⑽的整體厚度，同時，藉由該叙光 體4維持該導光板的耦光效率。 *相較於目前的導光板應用於背光模組，為使背光模組 薄型化’需減少導光板的厚度，卻也造成導光板的叙光效 率降低；本發明導光板’則可利用降低該板本體3的厚度 使該背光模組1GG達到薄型化’並以該麵光體4維持該導 光板的耦光效率。 以下再藉由模擬實驗驗證上面所述，然，需先說明， 貫驗中，光源之發光面長度為〇·45毫米，實驗結果如下： 當目前的導光板厚度為〇·3毫米時，導光板的耦光效率 是為58%。 當本發明導光板的板本體3厚度為0.3毫米時（該輕光 體4之入光面41的厚度為〇·45毫米，該第_頂面區42丨的 長度是〇·7毫米，該第二頂面區422的長度是17毫米）， 該導光板的耦光效率為72%。 因此’對照上述實驗數據，確實可證明本發明導光板 的設計在應用於製造薄型化的光學模組同時，兼顧該導光 8 200835965 板的轉光效率。 :閱圖6，本發明導光板之第二較佳實施例大致上類似 接以弟-較佳實施例，其不同點僅在於㈣光冑4的底連 面43，在本例中，該底連接面43具有一自該入光面“ ^亥板本體3时向延伸，且與該板本體3相間隔，並與 :入光面41底邊位於同一水平面上的第一底面部431，及 一連接該第—底面部431與該板本體3之底面32，且向上 傾斜的第二底面部432。 光束是自該人光面41射人該導光板，並往該板本體3 的方向傳遞，且自該板本體3的頂、底面31、32射出該導 光板。因&，本例的設計是為可雙面出光的導光板（參閱 圖7 ) 〇 參閱圖8,本發明導光板之第三較隹實施例大致上亦類 似於該第-較佳實施例，其不同點是在於：該板本體3的 侧視剖面是呈楔形，該頂、底面31、32之間的距離是往遠 離於該輕光體4的方向線性遞減，且該頂面31位於同一水 平面上’該㈣體4的底連接面43與該板本體3的底面32 切齊。 光束是自該入光® 41射入該導光板，並往該板本體3 的方向傳遞，S自該板本體3的頂面31射出該導光板。 本例中，該側視剖面呈楔形的板本體3可提高光束自 該頂面3 1射出該導光板的機率。 縱上所述，本發明導光板利用自該板本體3 一體延伸 該耦光體4，當該導光板應用於一光學模組時，可藉由減小 9 200835965 該板本體3的厚度而達到薄型化該光學模組，並藉由該耦 光體4兼顧該導光板的耦光效率，確實達到本發明的目的 〇 惟以上所述者’僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1疋一側視圖，說明目前的一種導光板 圖2是一側視示意圖，說明圖i的導光板設置於背光 模組中； 圖3是一侧視示意圖，說明目前另一種導光板，並設 置於背光模組中； 圖4是一側視圖，說明本發明的導光板之第一較佳實 施例； 圖5是一側視示意圖，說明圖4之導光板設置於_背 光模組中； 圖6是一側視圖，說明本發明導光板之第二較佳實施 例； 圖7是一側視示意圖，說明圖6之導光板設置於—背 光模組中；及 圖8是一側視圖，說明本發明導光板之第三較佳實施 例0 10 200835965 【主要元件符號說明】 100… •…背光模組 4…… •…耦光體 101… 擴政片 41 ••… —入光面 102… …·增亮片 42••… •…頂連接面 103… •…保護片 421 ··· —弟 頂面部 104… •…反射片 422… 弟—頂面ap 105… •…光源 43 ••… •…底連接面 3 ....... •…板本體 431 ··· …·第一底面部 31…… •…頂面 432… …·第二底面部 32…… •…底面 A: 11200835965 IX. Description of the invention: [Technical field to which the invention pertains] The invention relates to a light guide plate, and in particular to a light guide plate of a type of optical module. [Prior Art] Referring to the present invention, the light guide plate 2G includes the opposite - top surface 2 i = the bottom surface 22, and - the front surface 23' beam connecting the corresponding sides of the top and bottom surfaces 21, 22 is from The human light surface 23 shoots the light guide plate 2〇 and transmits it in a direction away from the light incident surface 23, and the plate 20 is ejected from the top surface 21. The light guide plate 20 is widely used in the field of optics, and the backlight module (10) is disposed on the light guide plate 20, and the f-light module (10) further includes a stack of the light guide plate 2G. a diffusion sheet (8) on the surface 21, two brightness enhancement sheets and a protective sheet 1G3, a reflection sheet 104 stacked under the bottom surface 22 of the light guide plate 2, and a light incident on the light guide plate 2 A fascinating light source 10 5 . Since the development trend of the optical group is toward thinning, it is intuitive to 'reduce the thickness of the pure 2G (that is, the distance between the tops a and 22 of the top of the light guide 2). Helping the backlight module to be thinned, but when the thickness of the light guide plate 20 is smaller than the length of the light-emitting surface of the light source 1 () 5, part of the light beam cannot be coupled into the light guide plate 2, resulting in the guide The light-light efficiency of the light plate is reduced and linearly attenuated, and by simulation experiments, it is found that the thickness of the light guide plate 20 decreases (M mm, light and light efficiency will be; 18.57% yak 5 200835965, see Fig. 3' At present, another light guide plate having a wedge-shaped side view is disposed in a backlight module 1 ,, and the light guide plate 20 in such a manner has a reduced thickness and a loss of coupling light efficiency. Therefore, in the manufacture of a thinned backlight module and the coupling efficiency of the light guide plate 2, it has become a goal of joint efforts at present. [Invention] Therefore, an object of the present invention is to provide a light guide plate. Can be applied to manufacturing thin The optical module of the present invention comprises a board body and a light coupling body. The board body includes an opposite top surface and a bottom surface. The coupling body is Extending integrally from the board body, and comprising a light incident surface away from the board body for incident light beam, a top connecting surface connecting the top edge of the light incident surface and a top surface of the board body, and a connection connection a bottom connecting surface of the smooth surface and a bottom connecting surface of the bottom surface of the board body, wherein a distance between the top and bottom connecting surfaces is not less than a distance between a top surface and a bottom surface of the board body, and a top edge of the light incident surface protrudes from the board The top surface of the body, and the top connecting surface and the top surface together form a curved plane. The effect of the present invention is to integrally extend the light-converting body from the board body, and when applied to an optical module, the optical module The component can be stacked on the top surface of the board body and the optical module can be thinned by reducing the thickness of the board body, and the light coupling efficiency of the light guide plate is maintained by the light coupling body. Embodiments of the Invention and Other Techniques Related to the Invention The details, features, and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the accompanying drawings, which are set forth below. The same components are denoted by the same reference numerals. Referring to Figure 4, a first preferred embodiment of the light guide plate of the present invention comprises a plate body 3 and a light coupling body 4. The side view of the plate body 3 is Rectangular and including an opposite top surface 31 and a bottom surface 32. The light coupling body 4 extends integrally from the board body 3 and includes a light incident surface 41 and a connection away from the board body 3 for incident light beams. a top connecting surface 42 of the top surface of the light incident surface 41 and a top surface 31 of the board body 3, and a bottom connecting surface 43 connecting the bottom edge of the light incident surface 41 and the bottom surface 32 of the board body 3, the top The distance between the bottom connecting surfaces 42 and 43 is not less than the distance between the top and bottom surfaces 31 and 32 of the board body 3. The top edge of the light incident surface 41 protrudes from the top surface 31 of the board body 3, and the top The connecting surface 42 and the top surface 31 together form a curved plane. The top connecting surface 42 has a first top surface portion 421 extending from the light incident surface 41 toward the board body 3 and spaced apart from the board body 3 and on the same horizontal plane as the light incident surface 41. And a second top surface 422 that connects the first top ridge 421 and the top surface 31 of the board body 3 and is inclined downward. The light beam is incident on the light guide plate from the light incident surface 41, and is transmitted to the plate body 3, and the light guide plate is emitted from the top surface 31 of the plate body 3. Next, referring to FIG. 5, the light guide plate is applied to an optical module. In this example, in 200835965, the optical module is illustrated by a conventional #4^月九核组100. The backlight module 100 further includes a reflection of a diffusion sheet 101, two brightness enhancement sheets 102, and a bottom surface 32 of the board body 3 on the top surface 31 of the board body 3 of the guide board. The light source of the one side 41 is 1〇5. A protective sheet 103, a stack of 104, and a backlight module 1 (9) disposed on the light to reduce the thickness of the board body 3 (ie, the board body 3_, the bottom surface 31, 32) The distance _, f can reduce the overall thickness of the backlight module (10), and at the same time, the light coupling efficiency of the light guide plate is maintained by the light body 4. * Compared with the current light guide plate applied to the backlight module, in order to make the backlight module thinner, the thickness of the light guide plate needs to be reduced, but the light-reducing efficiency of the light guide plate is also reduced; the light guide plate of the present invention can be used to reduce the light guide plate. The thickness of the board body 3 makes the backlight module 1GG thinner and maintains the light coupling efficiency of the light guide plate with the surface light body 4. The following is to verify the above by simulation experiments. However, it should be noted that the length of the light-emitting surface of the light source is 〇·45 mm. The experimental results are as follows: When the current thickness of the light guide plate is 〇·3 mm, The light coupling efficiency of the light panel is 58%. When the thickness of the plate body 3 of the light guide plate of the present invention is 0.3 mm (the thickness of the light incident surface 41 of the light body 4 is 〇·45 mm, the length of the first top surface region 42丨 is 〇·7 mm, The length of the second top surface region 422 is 17 mm), and the light coupling efficiency of the light guide plate is 72%. Therefore, it can be confirmed from the above experimental data that the design of the light guide plate of the present invention is applied to the manufacture of a thinned optical module while taking into consideration the light conversion efficiency of the light guide 8 200835965. Referring to Figure 6, a second preferred embodiment of the light guide of the present invention is substantially similar to the preferred embodiment, except that the bottom surface 43 of the aperture 4 is in the fourth embodiment. In this example, the bottom The connecting surface 43 has a first bottom surface portion 431 extending from the light incident surface and extending from the main plate body 3 and spaced apart from the bottom surface of the light incident surface 41, and a second bottom surface portion 432 which is connected to the bottom surface portion 431 and the bottom surface 32 of the plate body 3 and which is inclined upward. The light beam is incident on the light guide plate from the human light surface 41 and is transmitted to the plate body 3 And the light guide plate is emitted from the top and bottom surfaces 31 and 32 of the board body 3. Because of this, the design of the present example is a light guide plate capable of emitting light on both sides (refer to FIG. 7). Referring to FIG. 8, the light guide plate of the present invention The third embodiment is substantially similar to the first preferred embodiment in that the side view of the plate body 3 is wedge-shaped, and the distance between the top and bottom surfaces 31, 32 is Linearly decreasing in a direction away from the light body 4, and the top surface 31 is on the same horizontal surface 'the bottom connection surface 43 of the (four) body 4 The bottom surface 32 of the plate body 3 is aligned. The light beam is incident on the light guide plate from the light entrance plate 41, and is transmitted to the plate body 3, and the light guide plate is emitted from the top surface 31 of the plate body 3. In the example, the plate body 3 having a wedge-shaped side view can increase the probability of the light beam exiting the light guide plate from the top surface 31. In the longitudinal direction, the light guide plate of the present invention integrally extends the light coupling body from the plate body 3. 4. When the light guide plate is applied to an optical module, the optical module can be thinned by reducing the thickness of the board body 3 of 200835965, and the coupling of the light guide plate is balanced by the light coupling body 4. The light efficiency is indeed the object of the present invention, and the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the scope of the patent application and the description of the invention are generally applicable to the present invention. The simple equivalent changes and modifications are still within the scope of the present invention. [Simplified Schematic] FIG. 1 is a side view showing a current light guide plate FIG. 2 is a side view, illustrating i light guide plate is set in backlight FIG. 3 is a side view showing another light guide plate and disposed in the backlight module; FIG. 4 is a side view showing the first preferred embodiment of the light guide plate of the present invention; FIG. 6 is a side view showing a second preferred embodiment of the light guide plate of the present invention; FIG. 7 is a side view of the light guide plate of FIG. The light guide plate is disposed in the backlight module; and FIG. 8 is a side view illustrating the third preferred embodiment of the light guide plate of the present invention. 0 10 200835965 [Main component symbol description] 100... •... backlight module 4... •...Coupling body 101... Expansion sheet 41 ••... —Into the light surface 102...··Brightening sheet 42••... •...Top connection surface 103...•...Protection sheet 421 ··· —Dimed face 104... ...reflector 422... brother - top surface ap 105... •...light source 43 ••... •...bottom connection surface 3 ....... •...plate body 431 ·····first bottom surface portion 31... ... top surface 432...·second bottom surface portion 32... •... bottom surface A: 11