六、發明說明： ， 【發明所屬之技術領域】 本發明係關於一種背光模組，尤指一種應用於液晶顯示器、出光· ' 均勻度較高之背光模組。 ° , 【先前技術】 由於液晶顯示器具輕、薄、耗電小等優點，廣泛應用於筆記本電 腦、行動電話、個人數位助理等現代化資訊設備。因液晶本身不具發 鲁光特性’需為其提供背光模組以實現顯示功能。背光模奴需具有較高 之出光均勻度’從而提昇採用該背光模組之液晶顯示 度、全屏輝度效果及可視角度。 琴 先别技術背絲組包括光軌導光板，光源係姉導光板之光入 射面設置’該導光板引導自光源發出光束之傳輸方向，將線光源或點‘ 光源轉換成面光源出射。 . 、，目刖-般採用冷陰極榮光燈管作為光源，雖然冷陰極營光燈管之 出光輝度有不錯之顯示效果，但其存在以下缺陷：冷陰極螢光燈管之 籲二端發光輝度相對中間部分低，造成背光模組出光均句度不高；冷陰 極螢光燈了必須要高壓且由交流電源供應，此對便攜式顯示器係—項籲 不利之缺2且交流喊會影響並干擾液晶顯示器之影像訊號；冷陰 ，勞$燈^為圓柱體發光’就利用率低；冷陰極螢光燈管之壽命會 又到皿度:響而大崎低；另，使用冷陰極螢光燈管之液晶顯示器相 對成本較南。 /月參閱第―® ’為克服冷陰極螢級管之雜，先前技術背光模. 且採用發光—極體等點光源。該背光模組工包括點光源η、導光板1〇 及反射板13 ;其中’該點光源η位於該導光板入光面ιοί -側，該 1333102 反射板13位㈣導光板底面1〇3 一側。為增強出光均勾度，該導光板 底面103分佈有網點121，出光面設有聚光圖案122 ;惟，該先前 技術背光齡1存林足··絲組使魏紐、U，艇垂直入光 面101方向光強分佈不均勾，另，光利用率亦不高。 ^鑑於此’提供—種光能利用率高且出光均勻度高之背光模 為必需。 【發明内容】 模組本發明之目的在提供一種於光能利用率高且出光均勻度高之背光 本模組包括至少—點光源、至少—與該點光源連接之偶 “、至少-與該轉合器連接且傳輸點光源 狀光束之導光光纖及-上導光基板盘一下導来其& 轉換為線 姆應之簡微擾結構來祕料光光纖使得 ^光光難生凹顧嫌之料，料光光纖包細該上導光基板 =之複數彎曲部’該點光源所發光束自該複數料部直接向上導光 土出射，且隨遠離點光源端，該凹槽微擾結構深度逐漸增加。 =先前麟概’本判背賴_用導光賴將點光源發出之 含束句=入導光板内部’由於導光光纖與點光源之間之偶合效率 光—用率利用上下導光基板之凹微擾結構，使得 ^束=絲咖狀纽雜件得到破壞，另，因賴微擾結構越 木、漏錢量越大，又因為距辆额総 微擾結構較深，達到各處出光能量均衡之效果。故疋離點先源處 【實施方式】 請參閱第二圖及第三圖，係本發明背光模組第—實施方式。該背 5 1333102 光杈組200包括點光源210、一‘偶合器250、一組傳輸點光源210所發 光束之導光光纖240及挾持該組導光光纖24〇之導光基板22〇、230。 該點光源210可以是小分子發光二極體或高分子發光二極體，亦 可採用雷射二極體以增加輝度。 該組導光光纖240係用以傳輪點光源21〇所發出之光束，其易於 與點光源21〇相偶合，可有效提昇背光模組i㈤之光能利用率，從而 增力:輝度。該組導光光纖24〇 一般係高純度之玻璃抽絲材質，其為光 束提供低彳貝失之傳輸路徑，其亦可為耐熱塑膠光纖，其半徑約為1〇〇〇 微米以下。 該導光基板220、230挾持導光光纖24〇,其相對之表面222及232 設置凹槽婦結構（未標示）以眺導光光纖·，其巾，隨遠離點 光源210端凹槽深度逐漸增加，使得部分光束因為導光光纖24〇之全 反射條件被破壞而均勻輸出，且光束自上導光基板22Q之表面出 射。 一併參閱第四圖，該導光基板22〇、230之材質選自光學級丙烯酸 φ類聚合物、高分子聚合物、高分子碳化物、玻璃或石英其中之一係 採用射出成型錢切法製造，雜纽呈平行六面體，其相對之表面 222及2幻之凹槽微擾結構可經由精密加工絲，使得挾持於其間之 導光光纖240產生所需之曲率半徑R，從而破壞光束於導光光纖施 内部之全反射條件’實現所需之雜光源之功能。 該上導光基板220之表面221佈設微透鏡陣列223，以聚集自表 面221出射之光束’從而提高背光模組2〇〇之輝度。該微透鏡陣列您 包括複數連續設置之微透鏡條（未標示），惟，複數微魏條亦可間 隔設置。該微透鏡條之橫戴面呈三角形，惟，其亦可為矩形、梯形等 1333102 形狀。該上導光基板220之表面亦可開設凹槽以替代該微透鏡陣列 223。 該下導光基板230之表面231設置反射膜（圖未示），該反射膜係 由Si02與Τι02交替形成之多層薄膜，使投射於其上之光束反射，以 防止光束自該表面231逸出，該反射膜可採用化學氣相沈積法、電子 束洛錢法、賤鑛法等方法形成，其在可見光區之反射率可達98%以上。 准該反射膜亦可為銀、銘等金屬反射膜，亦可鄰近該表面231設置· 一反射板（圖未示）以替代反射膜實現該功能。 . =參閱第五®，係本發明背趙組第二實施方式。該實施方式與· 第-實施方式不同之處在於：該背光模組3⑻包括一組點光源則、 -組偶合器350、每-點光源通與一導光光纖35()偶合。 讀背光模組300亦包括一組傳輸點光源31〇所發光束之導光光纖‘ 34〇及挟持該組導光光纖娜之導基板獨观。 · 擁光源310可以是小分子發光二極體或高分子發光二極體亦 可採用雷射二極體以增加輝度。 "亥組導光光纖34〇係用以傳輸點光源31〇所發出之光束，其易於 ί 31G相偶合’可有效提昇背光模組細之光能率，從而 θ加輝度。該組導光先纖34〇 一般係高純度之玻璃抽絲材質且為光 j供低敎之雜雜，其柯為耐熱瓣賴，其半麵為麵 米以下。 設置板32G、33G挾持導光光纖⑽，其相對之表面322及332 。又θ錢結構（未標*)叫配導絲纖34G，其巾，隨遠離點 深度逐漸增加，使得部分光束因為導光二= 反射條件被破壞而均勾輸出，且光束自上導光基板32〇之表面321出 1333102 射。 . 當然，本發明還可有其他改進婦換。如，可進-步在鄰近上導 光基^ 220、320之上表面一側設置擴散板及棱鏡片（圖未示）。 ，综上所述，本發明確已符合發明專利要件，爰依法提出專利申請。 准’以上輯者僅為本㈣之雛實酬，軌縣、本紐藝之人士， ^援依本案發明精神所作之等效修飾或變化，皆^ 專利範圍内。 I甲5月 1333102 【圖式簡單說明】 第一圖係一種先前技術背光模組之立體圖。 第二圖係本發明背光模組第一實施方式之立體分解 圖 第三圖係第二圖所示背光模組之側面示意圖。 第四圖係第三圖之局部放大圖。 第五圖係本發明背光模組第二實施方式之立體圖。 元件符號說明】 點光源 導光光纖 210、310 240、340 背光模組 微透鏡陣列 偶合器 導光基板 導光基板表面 200、300 223'323 250 ' 350 220 、 230 、 320 、 330 221、222、231、232、321、322、331 332VI. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a backlight module applied to a liquid crystal display and having a high uniformity. °, [Prior Art] Due to its advantages of lightness, thinness, and low power consumption, liquid crystal display devices are widely used in modern information equipment such as notebook computers, mobile phones, and personal digital assistants. Since the liquid crystal itself does not have a lulight characteristic, it is necessary to provide a backlight module for display function. The backlight mode slave needs to have a higher uniformity of light emission' to improve the liquid crystal display degree, the full-screen brightness effect and the viewing angle of the backlight module. The first technical back wire group includes a light rail light guide plate, and the light source is disposed on the light incident surface of the light guide plate. The light guide plate guides the direction of light emitted from the light source, and converts the line light source or the point light source into a surface light source. The cold cathode glory lamp is used as the light source. Although the brightness of the cold cathode lamp has a good display effect, it has the following defects: the cold cathode fluorescent lamp The low relative to the middle part causes the backlight module to emit light with a low degree of uniformity; the cold cathode fluorescent lamp must be high voltage and supplied by the AC power supply, which is unfavorable for the portable display system and the communication shout will affect and interfere. The image signal of the liquid crystal display; cold and yin, the light of the lamp is a cylinder, and the utilization rate is low; the life of the cold cathode fluorescent lamp will be again to the degree of the dish: loud and low; and, in addition, the cold cathode fluorescent lamp is used. The liquid crystal display of the tube is relatively cost-effective. / month refers to the “-®” to overcome the cold cathode fluorescent tube, the prior art backlight module, and uses a point source such as a light-emitting body. The backlight module includes a point light source η, a light guide plate 1〇 and a reflection plate 13; wherein the point light source η is located on the light-incident surface ιοί- side of the light guide plate, and the 1333102 reflection plate 13 positions (four) the light guide plate bottom surface 1〇3 side. In order to enhance the light-emitting uniformity, the bottom surface 103 of the light guide plate is distributed with a mesh point 121, and the light-emitting surface is provided with a condensed pattern 122; however, the prior art backlight age 1 saves the forest foot·· silk group makes Wei New, U, boat vertical The light intensity distribution in the direction of the smooth surface 101 is uneven, and the light utilization rate is not high. ^ In view of this, it is necessary to provide a backlight mode with high utilization of light energy and high uniformity of light emission. SUMMARY OF THE INVENTION The object of the present invention is to provide a backlight having a high utilization rate of light energy and a high uniformity of light emission. The present module includes at least a point light source, at least - an even "connection" to the point light source, at least - The light guide fiber connected to the transducer and transmitting the light source beam and the upper light guide substrate are guided to convert it into a simple perturbation structure of the wire to make the optical fiber difficult to infuse The material is light, and the optical fiber package is thin. The upper light guide substrate=the plurality of curved portions. The light beam emitted from the light source directly exits the light-emitting material from the plurality of material portions, and the groove is perturbed away from the point source end. The depth of the structure is gradually increased. = The previous syllabus 'this judgment depends on _ using the light guide to emit the singularity of the point source = into the inside of the light guide plate' due to the coupling efficiency between the light guiding fiber and the point source. The concave perturbation structure of the upper and lower light guiding substrates makes the beam = wire coffee-like miscellaneous pieces damaged, and the more the wooden structure, the larger the amount of money leakage, and the deeper the perturbation structure , to achieve the effect of the balance of light energy everywhere. [Embodiment] Please refer to the second and third figures, which are the first embodiment of the backlight module of the present invention. The back 5 1333102 optical array 200 includes a point light source 210, a 'coupler 250, and a set of transmission point light sources. The light guiding fiber 240 of the 210 light beam and the light guiding substrate 22〇, 230 holding the light guiding fiber 24〇. The point source 210 may be a small molecule light emitting diode or a polymer light emitting diode, or may be used The laser diode 240 is used to transmit the light beam emitted by the point source 21〇, which is easy to couple with the point source 21〇, and can effectively improve the light energy utilization of the backlight module i (5). Rate, and thus force: brightness. The group of light guiding fibers 24 〇 is generally a high-purity glass spinning material, which provides a low-belly loss transmission path for the light beam, and can also be a heat-resistant plastic fiber with a radius of about 1 The light guiding substrate 220, 230 holds the light guiding fiber 24〇, and the opposite surfaces 222 and 232 are provided with a groove structure (not labeled) to guide the optical fiber, and the towel is away from the point source. The depth of the groove at the end of the 210 is gradually increased, making the part The beam is uniformly output because the total reflection condition of the light guiding fiber 24 is broken, and the light beam is emitted from the surface of the upper light guiding substrate 22Q. Referring to the fourth figure, the material of the light guiding substrate 22〇, 230 is selected from the optical level. One of acrylic φ polymer, high molecular polymer, high molecular carbide, glass or quartz is manufactured by injection molding, and the hybrid is in parallelepiped, and its opposite surface 222 and 2 phantom groove The perturbation structure can pass through the precision processing wire so that the light guiding fiber 240 held therebetween generates a desired radius of curvature R, thereby destroying the total reflection condition of the beam inside the light guiding fiber to achieve the function of the required hybrid light source. The surface 221 of the upper light guiding substrate 220 is provided with a microlens array 223 to collect the light beam emitted from the surface 221 to improve the brightness of the backlight module 2 . The microlens array includes a plurality of lenticular strips (not labeled) that are continuously set. However, the plurality of micro-wei strips can also be spaced apart. The lenticular strip has a triangular cross-sectional shape, but it may also have a shape of 1333102 such as a rectangle or a trapezoid. The surface of the upper light guiding substrate 220 may also have a groove instead of the microlens array 223. The surface 231 of the lower light guiding substrate 230 is provided with a reflective film (not shown) which is a multilayer film formed by alternately forming SiO 2 and Τ ι 02, and reflects the light beam projected thereon to prevent the light beam from escaping from the surface 231. The reflective film can be formed by a chemical vapor deposition method, an electron beam method, a bismuth ore method, and the reflectance in the visible light region can be more than 98%. The reflective film may be a metal reflective film such as silver or metal, or may be disposed adjacent to the surface 231. A reflective plate (not shown) may be used instead of the reflective film to perform the function. = Refer to the fifth®, which is the second embodiment of the present invention. This embodiment differs from the first embodiment in that the backlight module 3 (8) includes a set of point light sources, a group coupler 350, and a per-point source pass coupled with a light guiding fiber 35(). The read backlight module 300 also includes a set of light guiding fibers 348 that transmit the point light source 31 发光 and a guide substrate that holds the set of light guiding fibers. The light source 310 may be a small molecule light emitting diode or a polymer light emitting diode or a laser diode to increase the luminance. "Hai group light guiding fiber 34 用以 is used to transmit the light beam emitted by the point source 31〇, which is easy to ί 31G phase coupling' can effectively improve the light energy rate of the backlight module, and thus θ plus brightness. This group of light guiding fiber 34 〇 is generally a high-purity glass spinning material and is used for light j. The ke is a heat-resistant valve, and its half surface is below the surface. The setting plates 32G, 33G hold the light guiding fibers (10) opposite to the surfaces 322 and 332. The θ money structure (not marked *) is called the guide wire fiber 34G, and the towel gradually increases with the depth away from the point, so that part of the light beam is outputted due to the destruction of the light guiding light=reflection condition, and the light beam is from the upper light guiding substrate 32. The surface of the 321 321 out of 1333102 shot. Of course, the present invention may have other improvements. For example, a diffusion plate and a prism sheet (not shown) may be disposed on the upper surface side adjacent to the upper light guiding substrate 220, 320. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. The above-mentioned series is only for the remuneration of the (4), the people of the county, the New Zealand art, and the equivalent modifications or changes made by the invention in the spirit of the invention. I A May 1333102 [Simple description of the drawings] The first figure is a perspective view of a prior art backlight module. The second figure is a perspective view of the first embodiment of the backlight module of the present invention. The third figure is a side view of the backlight module shown in the second figure. The fourth figure is a partial enlarged view of the third figure. Figure 5 is a perspective view of a second embodiment of the backlight module of the present invention. Element symbol description] Point source light guiding fiber 210, 310 240, 340 backlight module microlens array coupling light guiding substrate light guiding substrate surface 200, 300 223 '323 250 ' 350 220 , 230 , 320 , 330 221 , 222 , 231, 232, 321, 322, 331 332