201005388 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組，特別是指—種可撓曲 式背光模組。 【先前技術】 參閱圖1，以一種利用光纖全反射原理傳輸光線的背光 • 額1為例’主要包含有—導純11、以陣列方式排列在 該導光板11 一板面lu的數光纖12，及設置在該等光纖 ® 一端側的一光源13。 當該光源13相對該等光纖12入射光線時，該等光纖 12可以藉由全反射原理傳輸光線行進，並導引光線入射至 該導光板11，進而將線光源轉成面光源，達到照明的目的 〇 以陣列方式排列在該導光板丨丨板面丨丨i的大量光纖12 ，雖然可以使該光源13的設置及數量，更符合空間效益及 φ 經濟效益，惟，不但會增加整體的厚度，且會阻礙該導光 板11撓曲，因此，這類的背光模組i並不能滿足可撓曲式 • 面板的需求。 ^ 參閱圖2、圖3,為改善前述導光板11不能撓曲的缺失 ，遂有業者直接將多數個發光二極體14或至少一冷陰極燈 管15設置在該導光板丨丨不被撓曲的二邊側il2，使該導光 板11可依循另外二邊侧113的曲率撓彎。藉此，該等發光 一極體14或該冷陰極燈管15光纖14同樣可以入射光線至 该導光板11，進而將線光源轉成面光源，達到照明的目的 201005388 惟’若該導光板ii的邊側m有撓曲的情形時，可能 會造成該等發光二極體！4位移及麟’或造成該冷陰極燈 管15毀損及折斷，因此，該導光板^雖然可以撓曲，卻只 能依循該等邊側113的曲率以單一的特定方向撓曲，有使用 受限、使用不便等不符合使用需求的缺失。 【發明内容】 因此，本發明之目的，即在提供一種撓曲方向不受限 制的可撓曲式背光模組。 於是，該可撓曲式背光模組，包含一可撓性導光板， 及至少一可撓性光纜。該光纜是與該導光板併鄰，可連同 該導光板依循相同的曲率撓彎，且依據全反射原理傳輸光 線，並具有形成在一外表面的數微結構，該等微結構是用 於破壞全反射路徑而導引光線入射至該導光板 本發明的功效是藉由該光纜可隨同該導光板撓彎的特 性，使該導光板的撓曲方向不受光源或該光纜的限制，而 能符合使用需求，及提昇使用上的實用性。 【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 以下配合參考圖式之數較佳實施例的詳細說明中，將可清 楚的呈現》 參閱圖4、圖5,本發明可撓曲式背光模組的一第一較 佳實施例包含一可撓性導光板3、一可撓性光纜4、一反光 元件組5，及一光源6。 201005388 §導光板3具有反向相對的二第一邊侧31，及反向相 對且鄰接該等第-邊側的二第二邊側32。 口 i光纜4在本較佳實施例為高數值孔徑的光纖或是任 可一種可以依據全反射原理傳輸光線的光導管。該光纜* 是與該導光板3其中—第—邊側31併鄰，並具有形成在一 , 側且面對該導光板3第—邊側31的-導光面41、形成在另 -側且面對該導光面41的―反射面42、形成在該反射面 42的數微結構43，及形成在二端的一入光端44與一出光 私45該等微結構43可以是凸部、凹部及此等之一組合， 在本較佳實施例中，該等微結構43的造型為V型，也可以 疋梯垔半圓型、網點及此等之一組合。該導光面41與該 反射面42在本較佳實施例分別為一水平面。 該反光元件組5具有形成在該光纜4出光端45的一第 反光件51，及覆蓋在該光瘦4反射面42上的一第二反光 件52。該第一反光件5 2在本較佳實施例為一鋁泊片，與該 第反光件51同樣用於反射光線’可提昇該光纜4内光線 的利用率。 * 該光源6是相對該光纜4的入光端44入射光線。該光 - 源6在本較佳實施為發光二極體（LED)。 參閱圖4、圖5 ’及附件i，當該光源6相對該光纜4 的入光端44入射光線時，該光纜4可以依據全反射原理， 及該第一反光件51、第二反光件52的反射作用，傳輸光線 依循該光規4行進，由於該等微結構43會破壞光行進的全 反射’使光線由預期方向射出，且該導光面41與反射面42 7 201005388 可以改變光線的折射角度，提高光線朝向該導光板3的入 光通量’因此，在光線依循該光規4行進的過程中，會因 為該等微結構43'該導光面41、該反射面42產生光折射 的現象’而導？丨光線由該第—邊側3丨人射至該導光板3， 進而將線光源轉成面光源，達到照明的目的。 參閱圖6’及附件2’由於該光纜4是設置在該第一邊-側31，因此，當該導光板3依循該等第二邊側32的曲率撓 f時’該光規4並不受該導光板3撓曲角度的影響，而同 樣能導引光線由該第—邊側31人射至該導光板3，進而將◎ 線光源轉成面光源，達到照明的目的。 參閱圖7、圖8，及附件3、4，當該導光板3依循該等 第一邊側31的曲率撓彎時，該光纜4也會依循該第一邊侧 31的曲率撓彎，由於該光纜4是隨同該導光板3撓曲且 撓曲方向相同，因此，對於該導光板3與該光纜4每一微 小的橫向斷面（切線方向）而言，該光纜4幾乎可以將直線行 進的光線完全導引至該導光板3内，藉此，將線光源轉成 面光源’達到照明的目的。 © 參閱圖9，及附件5，是本發明一第二較佳實施例，其 -與該第一較佳實施例大致相同，不同處在於，該第二較佳 實施包含有分別與該導光板3第一邊側31併鄰的二光纜4 ’及分別相對該光纜4的入光端44入射光線的二光源6。 該等光源6同樣可以是發光二極體（LED)。 由附件5可以看出，二條光纜4所形成的加乘效果， 可以大幅提高該導光板3的入光通量，藉此，使本發明在 8 201005388 可以撓曲的刖題下’提昇該導光板的亮度及光輝度。 參閱圖10,是本發明一第三較佳實施例，其與該第— 第較佳實施例大致相同，不同處在於，該光規4的斷 面概呈梯形’且更具有鄰接該導光面41與該反射面42且 分別形成有一傾角0的二折射面46。 藉此，該等折射面46也可以改變光線的折射角度，提 同光線朝向該導光;^ 3的人光通量，使該導光板3可以獲 得更優良的亮度及光輝度。 參閱附件6、7 ’值得—提的是，該光鏡4上每一微結 構43的深度、折射面夾角的變化，及配置時的疏、密變化 都會改變光折射的效果，而能依據實際需求，對該等微 結構43做適當的配置，以獲得最佳的亮度及光輝度。 ^且由附件6、7可知道’當該光纜4改以梯形截面(第三 較佳實施例）時的人光通量比圓形或橢圓形截面的光缆4佳（ 第一' 二較佳實施例），尤其在該折射面46的0角低於175 。時，出光效率會有明顯的增加，當該折射面邨的0角低 於5 A光效率可以增加近2〇%，而能大幅提昇入光通量 〇 據上所述可知，本發明之可撓曲式背光模組具有下列 優點及功效： 1.由於該光纔4是設置在該導光板3的第一邊側31， 其高度最小可以略小於該導光板3的厚度，或等於、或略 大於該導光板3的厚度，因此，對於整體的厚度而言，幾 乎可以忽略該缝4,而能縮減整㈣厚度，提昇配置時的 9 201005388 空間效益。 2·由於該光緵4具有可掩曲的姓认 m /、, !視曲的特性，因此，該 除了可以在不影響光缦4的情形下，依循該等第二邊側32 的曲率撓料，也可與該紐4依循料[邊側3 率撓彎’使該導練3沒有撓曲方向的限制， 撓曲的導光板3與光纜4而言，該光 、 凡1』从順利的將直 線行進的光線導引至該導光板3内，達 心4，，、、啊的目的，進 ❹ 而有效提昇使用上的方便性與實用性，使本發明且 泛的適用性。 、有更廣 以上所述只是本發明之較佳實施例而者 田个能以此 限定本發明實施之範圍，即大凡依本發明巾請專利範圍及 發明說明内容所作之簡單的等效變化與修飾， 明專利涵蓋之範圍内。 10 201005388 【圖式簡單說明】 圖1是一立體圖’說明一般使用光纖陣列的背光模組 ， 圖2是一立體圖，說明另一種使用發光二極體且可撓 曲的背光模組； 圖3是一立體圖’說明另一種使用冷陰極燈管且可撓 ' 曲的背光模組； 圖4是一立體圖，說明本發明可撓曲式背光模組的一 參 第一較佳實施例； 圖5是該第一較佳實施例的一剖視圖； 圖6是該第一較佳實施例依循二第二邊側撓曲的一立 體圖； 圖7是該第一較佳實施例依循二第一邊侧撓曲的一立 體圖； 圖8是該第一較佳實施例撓曲的一侧視圖； 圖9是一立體圖’說明本發明可撓曲式背光模組的一 ❹ 第二較佳實施例；及 圖10是一立體圖，說明本發明可撓曲式背光模組的一 , 第一較佳實施例。 【附件簡單說明】 附件1:該第一較佳實施例未撓曲時的入光通量模擬圖 * 附件2 :該第一較佳實施例依循二第二邊側撓曲時的入 11 201005388 光通量模擬圖； 邊側撓曲時的入 附件3 :該第一較佳實施例依循二第一 光通量模擬圖； 附件4 :該第一較佳實施例撓曲時光線沿橫向行進至 縱向斷面的入光通量模擬圖； 附件5 :該第二較佳實施例撓曲時的入光通量模擬圖。 附件6 :出光效率比較表；及 附件7 :入光通量比較表。 ❹ 12 201005388 【主要元件符號說明】 3…… ••…導光板 44 •…入光端 31…· .....第 邊侧 45.··· …·出光端 32.… …··第二邊侧 46·.··. -----折射面 .....土礙 C ...... ....CZ >?> /4* Ln 4..... 元規 3 汉尤兀彳千組 41…· .....導光面 51 ··..· •…第一反光件 42·.·. .....反射面 52·.··. •…第二反光件 43.…. ••…微結構 6…… -----光源 13201005388 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a flexible backlight module. [Prior Art] Referring to Fig. 1, a backlight using the principle of total reflection of optical fibers to transmit light is used as an example of 'a main part of the optical fiber 12 which is arranged in an array and arranged in an array on the surface of the light guide plate 11 And a light source 13 disposed on one end side of the optical fiber®. When the light source 13 is incident on the optical fibers 12, the optical fibers 12 can transmit light by the principle of total reflection, and guide the light to be incident on the light guide plate 11, thereby converting the line light source into a surface light source to achieve illumination. The purpose is to arrange a large number of optical fibers 12 on the surface of the light guide plate in an array, although the arrangement and number of the light sources 13 can be more in line with space efficiency and economic benefits, but not only increase the overall thickness. And the light guide plate 11 is hindered from flexing, and therefore, the backlight module i of this type cannot meet the requirements of the flexible panel. Referring to FIG. 2 and FIG. 3, in order to improve the lack of deflection of the light guide plate 11, the manufacturer directly places a plurality of light-emitting diodes 14 or at least one cold cathode lamp 15 on the light guide plate without being scratched. The two sides il2 of the curved piece enable the light guide plate 11 to flex according to the curvature of the other two sides 113. Thereby, the light-emitting body 14 or the cold cathode lamp 15 fiber 14 can also inject light into the light guide plate 11, thereby converting the line source into a surface light source for illumination purposes 201005388, if the light guide plate ii When the side m has a flexing condition, the light-emitting diodes may be caused! 4 displacement and Lin' or cause the cold cathode lamp 15 to be damaged and broken. Therefore, although the light guide plate can be flexed, it can only flex in a single specific direction according to the curvature of the sides 113. Limitations, inconveniences, etc. do not meet the lack of use requirements. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a flexible backlight module in which the direction of deflection is not limited. Therefore, the flexible backlight module comprises a flexible light guide plate and at least one flexible optical cable. The optical cable is adjacent to the light guide plate, can be bent along with the same curvature along the light guide plate, and transmits light according to the principle of total reflection, and has a plurality of microstructures formed on an outer surface, and the microstructures are used for destruction The effect of the present invention is that the optical fiber cable can be flexibly bent along with the light guide plate, so that the deflection direction of the light guide plate is not restricted by the light source or the optical cable, and Meet the needs of use, and improve the practicality of use. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments with reference to the drawings. Referring to FIG. 4 and FIG. A first preferred embodiment of the flexible backlight module includes a flexible light guide plate 3, a flexible optical cable 4, a reflective component group 5, and a light source 6. 201005388 § Light guide plate 3 has two opposite first side sides 31, and two second side sides 32 opposite in opposite directions and adjacent to the first side. The port i cable 4 is a high numerical aperture fiber in the preferred embodiment or a light pipe which can transmit light in accordance with the principle of total reflection. The optical cable* is adjacent to the first side 31 of the light guide plate 3, and has a light guiding surface 41 formed on one side and facing the first side 31 of the light guiding plate 3, and formed on the other side. And facing the reflecting surface 42 of the light guiding surface 41, the micro-structure 43 formed on the reflecting surface 42, and the light-incident end 44 formed at the two ends and a light-emitting end 45. The microstructures 43 may be convex portions. In the preferred embodiment, the microstructures 43 are V-shaped, and may be combined with a semi-circular shape, a halftone dot, and the like. The light guiding surface 41 and the reflecting surface 42 are respectively a horizontal plane in the preferred embodiment. The retroreflective element group 5 has a first reflecting member 51 formed on the light exiting end 45 of the optical cable 4, and a second reflecting member 52 covering the light thin 4 reflecting surface 42. The first reflecting member 52 is an aluminum plate in the preferred embodiment, and is used to reflect light as in the reflecting member 51 to increase the utilization of light in the cable 4. * The light source 6 is incident on the light incident end 44 of the optical cable 4. The light source 6 is preferably embodied as a light emitting diode (LED). Referring to FIG. 4, FIG. 5' and the accessory i, when the light source 6 is incident on the light incident end 44 of the optical cable 4, the optical cable 4 can be based on the principle of total reflection, and the first reflector 51 and the second reflector 52. The reflection effect, the transmitted light travels along the optical gauge 4, because the microstructures 43 will destroy the total reflection of the light travel', causing the light to be emitted from the intended direction, and the light guiding surface 41 and the reflecting surface 42 7 201005388 can change the light. The angle of refraction increases the incoming light flux of the light toward the light guide plate 3. Therefore, in the process of the light traveling along the light gauge 4, the light guide surface 41 and the reflective surface 42 generate light refraction due to the microstructures 43'. Phenomenon's guidance? The ray light is emitted from the first side to the light guide plate 3, and the line light source is converted into a surface light source to achieve the purpose of illumination. Referring to FIG. 6' and the accessory 2', since the optical cable 4 is disposed on the first side-side 31, when the light guide plate 3 follows the curvature of the second side 32, the optical gauge 4 does not Under the influence of the deflection angle of the light guide plate 3, the light can be guided from the first side 31 to the light guide plate 3, and the ◎ line light source can be converted into a surface light source to achieve the purpose of illumination. Referring to FIG. 7 and FIG. 8 and the attachments 3 and 4, when the light guide plate 3 is bent according to the curvature of the first side 31, the optical cable 4 also follows the curvature of the first side 31, because The optical cable 4 is flexed with the light guide plate 3 and has the same direction of deflection. Therefore, for each of the light transverse sections (tangential direction) of the light guide plate 3 and the optical cable 4, the optical cable 4 can almost travel straight. The light is completely guided into the light guide plate 3, thereby converting the line source into a surface light source to achieve the purpose of illumination. Referring to FIG. 9 and FIG. 5, a second preferred embodiment of the present invention is substantially the same as the first preferred embodiment, except that the second preferred embodiment includes a light guide plate and a light guide plate respectively. 3, two optical cables 4' adjacent to the first side 31 and two light sources 6 respectively entering the light with respect to the light incident end 44 of the optical cable 4. The light sources 6 can likewise be light-emitting diodes (LEDs). It can be seen from the attachment 5 that the multiplication effect formed by the two optical cables 4 can greatly increase the luminous flux of the light guide plate 3, thereby making the invention improve the light guide plate under the problem that the 8 201005388 can be flexed. Brightness and brightness. Referring to FIG. 10, a third preferred embodiment of the present invention is substantially the same as the first preferred embodiment except that the optical gauge 4 has a trapezoidal shape and is adjacent to the light guide. The face 41 and the reflecting surface 42 are respectively formed with a two-refractive surface 46 having an inclination angle of zero. Thereby, the refractive surfaces 46 can also change the angle of refraction of the light, and the light is directed toward the light guide; the luminous flux of the human light can make the light guide plate 3 obtain better brightness and brightness. Refer to Attachment 6, 7 'Worth- mentioning that the depth of each microstructure 43 on the light mirror 4, the change of the angle between the refractive surfaces, and the change of the density during the configuration will change the effect of light refraction, and can be based on the actual The microstructures 43 are suitably configured to achieve optimum brightness and brightness. ^ And it can be known from the attachments 6, 7 that the human luminous flux when the optical cable 4 is changed to the trapezoidal cross section (the third preferred embodiment) is better than the optical cable 4 of the circular or elliptical cross section (the first 'two preferred embodiment> In particular, the 0 angle of the refractive surface 46 is lower than 175. When there is a significant increase in light extraction efficiency, when the 0-angle of the refractive surface is lower than 5 A, the light efficiency can be increased by nearly 2%, and the luminous flux can be greatly increased. As described above, the flexibleness of the present invention is known. The backlight module has the following advantages and effects: 1. Since the light 4 is disposed on the first side 31 of the light guide plate 3, the height thereof may be slightly smaller than the thickness of the light guide plate 3, or equal to, or slightly larger than The thickness of the light guide plate 3, therefore, for the overall thickness, the slit 4 can be almost ignored, and the thickness of the whole (four) can be reduced, and the space benefit of the 9 201005388 when the configuration is improved. 2. Since the aperture 4 has a property of being able to be masked, the characteristics of the visual recognition are m/, , and therefore, the division can follow the curvature of the second side 32 without affecting the aperture 4. Material, can also be used with the New 4 to follow the material [side 3 rate bending] so that the guidance 3 has no deflection direction limitation, the deflecting light guide plate 3 and the optical cable 4, the light, the 1" from the smooth The light traveling in a straight line is guided into the light guide plate 3 to achieve the purpose of the heart 4,,, and ah, thereby effectively improving the convenience and practicability in use, and the applicability of the present invention. The above description is only a preferred embodiment of the present invention, and the scope of the present invention can be limited by the scope of the invention, that is, the simple equivalent change of the patent scope and the description of the invention according to the invention. Modifications, within the scope of the patent. 10 201005388 [Simplified Schematic] FIG. 1 is a perspective view illustrating a backlight module generally using an optical fiber array, and FIG. 2 is a perspective view showing another flexible backlight module using a light-emitting diode; FIG. A perspective view 'illustrates another backlight module that uses a cold cathode lamp and is flexible. FIG. 4 is a perspective view showing a first preferred embodiment of the flexible backlight module of the present invention; FIG. FIG. 6 is a perspective view of the first preferred embodiment following the flexion of the second side; FIG. 7 is the first preferred embodiment following the first side of the first side. Figure 8 is a side elevational view of the first preferred embodiment; Figure 9 is a perspective view of a second preferred embodiment of the flexible backlight module of the present invention; 10 is a perspective view showing a first preferred embodiment of the flexible backlight module of the present invention. [A Brief Description of the Attachment] Attachment 1: Simulation of the incident light flux when the first preferred embodiment is not flexed * Attachment 2: The first preferred embodiment follows the entry of 11 when the second side is deflected. 201005388 Luminous flux simulation Figure 3: Inlet attachment 3 when the side is flexed: The first preferred embodiment follows two first luminous flux simulation diagrams; Annex 4: The light travels in the lateral direction to the longitudinal section when the first preferred embodiment flexes Luminous flux simulation diagram; Annex 5: simulation of the luminous flux at the time of deflection of the second preferred embodiment. Annex 6: Comparison table of light emission efficiency; and Annex 7: Comparison table of light fluxes. ❹ 12 201005388 [Description of main component symbols] 3... ••...Light guide plate 44 •...light input end 31...·..... side side 45.·····light-emitting end 32..........· Two sides 46·.··. -----Reflecting surface.....Early obstacle C............CZ >?> /4* Ln 4..... Yuanzhang 3 Han Youyi thousand group 41...·... light guide surface 51 ······...first reflector 42·.·......reflection surface 52·.··. •...second reflector 43..... ••...microstructure 6... -----Light source 13