200815865 九、發明說明： 【發明所屬之技術領域】 本發明疋有關於一種液晶_千哭中& 4日日硝不為零組件，特別是指 種採用LED作為光源的背光模組。 【先前技術】 參閱圖1，一種現有側光式背光模組10，包含一具有 一入光面⑴及-出光面112的導光、—鄰近該;;光 面的LED㈣12、一設置在該導光板u上方且鄰近該出 光面112的下擴散片13、一設置在該導光板11下方的反射 片14、一没置在該下擴散片13上方的增益片15、及一設 置在該等增益片15上方的上擴散片16。其中，該挪光 源12包括多數顆呈一直線狀排列的led燈i2i，並發射光 線=該入光面1U進入該導光板u ;當光線在該導光板U 内部依反射或折射作用行進之後，最終大部份光線經折射 後由該出光面112射出，少部份光線則會在射出該出光面 之兩，由该導光板11射向該反射片14，經反射後再回 」w亥V光板11内；該下擴散片丨3可將由該出光面！〗2射出 之光線均勻地擴散至該等增益片15;每一增益片15各包括 多數條相間隔設置的稜鏡部151，且其中之一增益片15，上 的多數稜鏡部151，是與另一增益片15，，上的多數稜鏡部 151，相互垂直的，當光線穿過該等增益片15時，利用該等 牙文鏡°卩151將光線聚集到一特定方向上，使該光線沿該特 定方向穿過該上擴散片16，達到以均勻地且集中在該特定 向地進入一液晶面板（Liquid Crystal Panel)(圖未示）。 5 200815865 d上述„亥led光源12㊣提供所需要的光通量，但 使用多數翻立封裝的LED帛121作為㈣财下列的缺 黑占· 一、 因為每一顆的LED燈121在亮度與色度的表現上 會有所不同，在使用前，需要對每一顆㈣燈i2i進行檢 測’依照亮度與色度分類，之後，將性能表現相似的同一 類LED燈121集合一定的數量後方可製成-LED光源12 ’例如一個長：寬是16: 9的12英对背光模組需要48顆 性能表現相似的^!>燈12卜方可製成一 LED光源Μ，如 此，造成過高的LED燈121分類與儲存成本。 二、 在對一電路基板進行LED燈121的焊接時，即俗 稱的打件，因為每一顆LED燈121皆是單獨封裝，所以對 每一顆LED燈121都必需要進行打件，如此，造成過高的 打件成本。 三、 每一顆LED燈121的發光，會隨發射光線角度的 改變而有不同的發光亮度，如此，當發射光線的角度過大 而無法有效進入鄰近的該入光面111時，其中一部份光線最 終會被其它零組件的表面吸收，造成整體LED光源12光通 量的流失與浪費。 【發明内容】 因此’本發明之目的，即在提供一種可以有效降低製 造成本及減少光通量流失的背光模組。 於是，本發明背光模組是包含有一導光板及一光源。 該導光板包括一入光面、分別連接於該入光面長方向上兩 6, 200815865 相反侧的一出光面與一底面，及容 及夕數概呈四角錐體並點狀 分佈於該底面之反射部；該光泝由 、，、 "尤/原包括多數鄰近於該入光面 並沿該入光面一長方向上相間陪士 — 々间1同地排列的LED燈組；其中 ，每一 LED燈組具有一電路其々土 λ 书路基板、多數顆設置於該電路基 板並面向該入光面的led單亓，Α 西# 平凡，及一覆蓋於該等LED單元 並呈透明可導光的保護材。 〜 本發明之功效在於覆蓋於多數顆led單元並呈透明可 :光的保護材’可將内部每-顆咖單元過大的發射光線 角度導正成整組LED燈組鲂盔隹▲ n ☆ 且、、且季乂為集中的發射光線角度，另外 ，不需要對每—顆LED單元都進行打件，Μ要對該等 LED燈組打件即可，確實能達到本發明之目的。 【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二個較 平乂仏只轭例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述 3 义又刖要庄思的是，在以下的說 月内谷中’類似的元件是 卞疋以相同的編號來表示。 參閱圖2、圖3，1 , 口 祝明本發明背光模組的一第一較佳實 施例，該背光模組包含··一 、 ¥尤板2、一反射片3、一下擴 散片4、二增益片$、_ l & 、 ^ 一上擴散片6，及一光源7。 呑亥導光板2是申缚人认 . ▲疋甲明人的一系列發明，參閱申請案號第 95120231 $虎，該導糸起 、 已括一供該光源7發射光線進入 的入光面21、分別連接 资亥入先面21 一長方向X上兩相反 側的一出光面22與一启而^ ^ ^ -面23、及夕數一體成型地設置於該 200815865 底面23亚概呈四角錐形的反射部24。在本實施 反射部24以等間跖从士 a 4 , Ψ 該等 7 陣列凹設於該底面23,並且位在 的反射部24，其表面積大於位在其它位置反射 4 /表面積’如此’具有較大表面積的反射部24可以 反射較多光線補償該位置不足的亮度。 本二射部24最小尺寸甚至可縮到4。_，而在 =:=::清楚，_式㈣等反射… 該反射片3是設置於鄰近該導光板2底面23,並包括 一可反射該底面23射出光線的反射面31。 遠下擴散片4是設置於鄰近該導光板2出光面22，並 σ字/出光面22射出之光線均勻地擴散至該等增益片$。 該等增益片5是設置於該下擴散片4上方，每一增益 片5各包括多數條相間隔設置的棱鏡$ : 增益片5,上的多數棱鏡部51，是與另一增益片而二二 棱鏡部5 1 ’’相互垂直的。 該上擴散片6是設置於該等增益片5上方，當光線穿 過該等增W 5時，藉由該等稜鏡部51將光線聚集到一特 定方向上’使該光線沿該特定方向穿過該上擴散片6,達到 以均勾地且集中在該特定方向地進入—液晶面板 Crystal Panel)(圖未示）。 該光源7是設置於鄰近該導光板2人光面2i，並包括 多數沿該人光® 21 -長方向上相間隔地排列的led燈組 71，每—LED燈、组71具有一電路基板711、多數顆設置於 200815865 該電路基板並面向該入光面的LED單元712，及一覆蓋於 该等LED單元712並呈透明可導光的保護材713。在本實 施例中，對一個長··寬是16 ·· 9的12英吋背光模組，該光 源7包括有6組LED燈組71，該等LED燈組71是呈一直 線狀地排列，且每一 led燈組71具有6顆1^£>單元712 。另外’如果單一顆LED單元712亮度能再提高，則每一 LED燈組71可由具有6顆LED單元712減為4顆LED單 元712，相反地，如果單一顆LED單元712亮度無法滿足 所而，則母一 LED燈組71必需由具有6顆LED單元7 i 2 增為8顆LED單元712。 以下說明本發明背光模組第一較佳實施例所具有的優 點： 、製成一光源7時需要的是6組性能表現相似的 led燈組71;而因為每一 LED燈組71内具有6顆led單 兀712 ,所以每一 LED燈組71的性能表現是由該6顆單顆 LED單元712性能表現的總和；依照統計學上的原則：將 N個樣品分配成Μ個次組合，其中M小於N，則該等次組 合之間的差異性小於該等樣品之間的差異性，換句話說， 即挑選特徵相似的次組合相較於挑選特徵相似的樣品機率 較高。對照本實施例，即挑選性能表現相似的lED燈組71 相較於挑選性能表現相似的LED單元712機率較高，如此 ，可有效降低LED單元712分類與儲存成本。 二、配合參閱圖4，在製成一 LED燈組71時，是使用 個透明可導光的保護材7丨3被覆在該等LED單元712上 200815865 ，通常保護材713是一種環氧樹酯封裝材料，如此，可使 得被覆的該等LED單元712所發出的光線在該保護材713 内進行反射後以較集中的角度發射光線，有效減少光通量 的飢失’在本實施例中，每一 LED燈組是具有約度的 發射光線角度。 歸納上述，本發明背光模組之光源7在該第一較佳實 靶例中，將現有使用48顆單獨封裝的[ED燈改變成6組 led燈組71，每組6顆LED單元712，如此，檢測與打件 的費用則從原有的48次大幅減少至6次，而且，在挑選性 月b表現相似的LED燈組71時，相較於挑選性能表現相似的 LED單元712機率更高，可有效降低lED單元712分類與 儲存成本。另外，使用一個透明可導光的保護材713被覆 在違等LED單元712上，也可以使該等LED單元712所發 出的光線在该保護材713内進行反射後以較集中的角度發 射光線，有效減少光通量的流失，確實能達到本發明之目 的。 翏閱圖5,說明本發明背光模組的一第二較佳實施例， 其中，與該第一較佳實施例的差異處在於：該導光板2的 底面23疋一平面，沒有其它凹設於底面23的反射部24 而且違入光面21是沿該長方向彎折區分成3個副入光面 211 ’而-位在兩端的兩個副入光面2ΐι，與中間的副入光面 2U刀別夾设有二個呈鈍角的夾角A，並且該光源的多數 k、、且71區分成3個組合。在本實施例中，該夾角a是 150度，上述LED燈組71的數量是4並被區分成1、2及1 10200815865 IX. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal _ 千 crying & 4 day niobium non-zero component, in particular, a backlight module using LED as a light source. [Prior Art] Referring to FIG. 1, a conventional edge-lit backlight module 10 includes a light guide having a light incident surface (1) and a light exit surface 112, adjacent to the light-emitting surface (LED) 12, and a light-emitting surface (12). a lower diffusion sheet 13 above the light plate u and adjacent to the light-emitting surface 112, a reflection sheet 14 disposed under the light guide plate 11, a gain piece 15 not disposed above the lower diffusion sheet 13, and a gain set at the same Upper diffuser 16 above sheet 15. The light source 12 includes a plurality of led lights i2i arranged in a line shape, and emits light = the light incident surface 1U enters the light guide plate u; when the light travels inside the light guide plate U by reflection or refraction, finally Most of the light is refracted and emitted from the light-emitting surface 112. A small portion of the light is emitted from the light-emitting surface, and the light-guide plate 11 is directed toward the reflective sheet 14. After being reflected, it is returned to the "Whai V-plate". 11 inside; the lower diffuser 丨 3 can be used by the illuminating surface! The emitted light is evenly diffused to the gain sheets 15; each of the gain sheets 15 includes a plurality of strips 151 spaced apart from each other, and one of the plurality of fins 151 on the gain sheet 15 is And the plurality of the top portions 151 of the other gain piece 15, perpendicular to each other, when the light passes through the gain pieces 15, the light beams are collected by the dental mirrors 151 to a specific direction, so that The light passes through the upper diffusion sheet 16 in the specific direction to achieve uniformity and concentration in the specific direction into a liquid crystal panel (not shown). 5 200815865 d The above-mentioned "Hailed Light Source 12 is providing the required luminous flux, but the LED 帛121 using most of the vertical package is used as the (4) below the lack of black, because each LED light 121 is in brightness and chromaticity. The performance will be different. Before use, each (four) lamp i2i needs to be tested 'classified according to brightness and chromaticity. Then, the same type of LED lamps 121 with similar performance can be assembled to a certain amount. - LED light source 12 ' For example, a 12-inch pair of backlight modules with a width of 16:9 requires 48 performances similar to each other! ^> Lights can be made into an LED light source, thus causing excessive The classification and storage cost of the LED lamp 121. 2. When the LED lamp 121 is soldered to a circuit substrate, it is commonly called a hit piece, because each LED lamp 121 is separately packaged, so for each LED lamp 121 It is necessary to carry out the hitting, thus causing excessive cost of hitting. 3. The illumination of each LED lamp 121 will have different brightness with the change of the angle of the emitted light, so that when the angle of the emitted light is too large Unable to effectively enter adjacent When entering the light surface 111, a part of the light is eventually absorbed by the surface of the other components, resulting in loss and waste of the luminous flux of the entire LED light source 12. [Invention] Therefore, the object of the present invention is to provide an effective reduction The backlight module of the present invention comprises a light guide plate and a light source. The light guide plate includes a light incident surface and is respectively connected to the length direction of the light incident surface. 6 , 200815865 a light-emitting surface and a bottom surface on the opposite side, and a rectangular pyramid and a point-shaped distribution on the reflection portion of the bottom surface; the light traces from, and, " And an LED lamp group arranged along the longitudinal direction of the light-incident surface, wherein each LED lamp group has a circuit, and the plurality of electrodes are disposed on the circuit. The substrate and the led surface facing the light-incident surface, the #西# ordinary, and a protective material covering the LED unit and transparently guiding the light. 〜 The effect of the invention is to cover the plurality of led units and to be transparent Yes: The protective material of light can guide the angle of the emitted light from the inside of each coffee unit to the whole set of LED light sets. 鲂 n n ☆ and , and the quarter is the concentrated angle of the emitted light. In addition, it is not necessary. For each of the LED units, it is possible to achieve the purpose of the present invention. It is possible to achieve the object of the present invention. [Embodiment] The foregoing and other technical contents, features and effects of the present invention are In the following detailed description of the two flat yoke examples with reference to the reference drawings, the present invention will be clearly described. In the present invention, it is described in detail in the following. 'Similar components are denoted by the same number. Referring to FIG. 2, FIG. 3, and FIG. 1, a first preferred embodiment of the backlight module of the present invention is provided. The backlight module includes a first plate, a reflective plate 3, and a lower diffusion plate 4. Two gain sheets $, _ l & , ^ an upper diffusion sheet 6, and a light source 7.呑海光光板2 is a series of inventions of the 缚甲人. ▲ 疋甲明人's invention, see application number 95120231 $虎, the guide has picked up, has included a light-emitting surface for the light source 7 to emit light into the light 21 A light-emitting surface 22, which is connected to the opposite side of the long-distance direction X, and a light-emitting surface 22, which are opposite to each other, are respectively integrally formed on the bottom surface of the 200815865. Conical reflecting portion 24. In the present embodiment, the reflecting portion 24 is equi-arranged from the a4, Ψ, and the 7 arrays are recessed on the bottom surface 23, and the reflecting portion 24 is located at a surface area larger than the position at other positions to reflect the 4/surface area. The larger surface area of the reflecting portion 24 can reflect more light to compensate for the insufficient brightness of the position. The minimum size of the second projection 24 can even be reduced to four. _, and in the =:=:: clear, _ (four) and other reflections... The reflection sheet 3 is disposed adjacent to the bottom surface 23 of the light guide plate 2, and includes a reflection surface 31 that reflects the bottom surface 23 to emit light. The far lower diffusion sheet 4 is disposed adjacent to the light exit surface 22 of the light guide plate 2, and the light emitted from the σ/light exit surface 22 is uniformly diffused to the gain sheets $. The gain sheets 5 are disposed above the lower diffusion sheet 4, and each of the gain sheets 5 includes a plurality of prisms spaced apart from each other: a plurality of prism portions 51 on the gain sheet 5, and another gain sheet The two prism portions 5 1 '' are perpendicular to each other. The upper diffusion sheet 6 is disposed above the gain sheet 5, and when the light passes through the increased W5, the light is collected by the jaws 51 in a specific direction to make the light along the specific direction. Through the upper diffusion sheet 6, it is achieved to enter the liquid crystal panel (not shown) in a uniform manner and concentrated in the specific direction. The light source 7 is disposed adjacent to the human light surface 2i of the light guide plate 2, and includes a plurality of LED light groups 71 arranged at intervals along the longitudinal direction of the human light, and each of the LED lamps and the group 71 has a circuit substrate. 711. A plurality of LED units 712 disposed on the circuit substrate and facing the light incident surface, and a protective material 713 covering the LED units 712 and transparently guiding the light. In this embodiment, for a 12-inch backlight module having a length and a width of 16··9, the light source 7 includes six sets of LED light groups 71, and the LED light groups 71 are arranged in a straight line. And each LED lamp group 71 has six cells 1 712. In addition, if the brightness of a single LED unit 712 can be further increased, each LED light group 71 can be reduced from having 6 LED units 712 to 4 LED units 712. Conversely, if the brightness of a single LED unit 712 cannot be satisfied, The mother-LED group 71 must be increased from 6 LED units 7 i 2 to 8 LED units 712. The following describes the advantages of the first preferred embodiment of the backlight module of the present invention: When forming a light source 7, six sets of LED lamp sets 71 having similar performance are required; and because each LED lamp set 71 has 6 The LED single lamp 712, so the performance of each LED lamp group 71 is the sum of the performance of the six single LED units 712; according to the statistical principle: N samples are assigned into a sub-combination, wherein If M is less than N, the difference between the equal combinations is less than the difference between the samples, in other words, the selection of similar sub-combinations is higher than that of the samples with similar features. Compared with the present embodiment, the lED lamp group 71 with similar performance is selected to have a higher probability than the LED unit 712 with similar performance performance, so that the classification and storage cost of the LED unit 712 can be effectively reduced. 2. Referring to FIG. 4, when an LED lamp group 71 is fabricated, a transparent light-conducting protective material 7丨3 is coated on the LED units 712 200815865. Generally, the protective material 713 is an epoxy resin. The encapsulating material is such that the light emitted by the coated LED units 712 is reflected in the protective material 713 to emit light at a relatively concentrated angle, thereby effectively reducing the hunger of the luminous flux. In this embodiment, each The LED light group is an angle of emitted light having an approximate degree. In summary, the light source 7 of the backlight module of the present invention is used in the first preferred target example to change the existing ED lamp into 48 groups of LED lamps 71, each group of 6 LED units 712. In this way, the cost of detecting and writing is greatly reduced from the original 48 times to 6 times, and when the LED lamp group 71 having similar performance in the selected month b is compared, the probability of selecting the LED unit 712 having similar performance is more. High, can effectively reduce the classification and storage cost of the lED unit 712. In addition, a transparent light-conducting protective material 713 is coated on the illegal LED unit 712, and the light emitted by the LED units 712 can be reflected in the protective material 713 to emit light at a concentrated angle. Effectively reducing the loss of luminous flux can indeed achieve the object of the present invention. Referring to FIG. 5, a second preferred embodiment of the backlight module of the present invention is illustrated. The difference from the first preferred embodiment is that the bottom surface 23 of the light guide plate 2 is flat and has no other recesses. The reflecting portion 24 on the bottom surface 23 and the light-receiving surface 21 are divided into three sub-light-incident surfaces 211' in the longitudinal direction, and the two sub-light-incident surfaces 2ΐ at the two ends, and the sub-light incident light in the middle The face 2U knife is provided with two angles A at an obtuse angle, and the majority k, and 71 of the light source are divided into three combinations. In this embodiment, the angle a is 150 degrees, and the number of the LED lamp sets 71 is 4 and is divided into 1, 2, and 1 10
200815865 等3個組合，分別設置於鄰近該等副入光面211。如此，分 別位於兩端的二LED燈組7;1，射發線光線經由對應的該 田|J入光面211’進入該導光板2，照射對應中間副入光面 ^1”的二組LED燈組71之間光線未交集的區域；B，減少該 V光板2上呈現有明亮區與陰暗區相互分佈的現象。 ^惟以上所述者，僅為本發明之較佳實施例而已，當不 ，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，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是現有一種側光式背光模組之一立體分解圖； 圖2疋一立體分解圖，說明本發明背光模組之一第一 較佳實施例； 圖3疋上述第一較佳實施例之一側視示意圖； 、圖4疋上述第一較佳實施例其中一組燈組之一 視示意圖；及 ^圖5疋正視示意圖，說明本發明背光模組之一第二 較佳實施例，复φ _ 、 ，、中一冷光板入光面沿一長方向彎折區分成3 200815865Three combinations, such as 200815865, are disposed adjacent to the sub-light incident surfaces 211, respectively. In this way, the two LED lamp groups 7; 1 respectively located at the two ends, the hairline rays enter the light guide plate 2 via the corresponding field entrance surface 211', and illuminate the two groups of LEDs corresponding to the intermediate sub-input light surface ^1" The area where the light between the lamp groups 71 does not overlap; B, the phenomenon that the bright area and the dark area are distributed on the V-plate 2 is reduced. However, the above is only the preferred embodiment of the present invention. The scope of the present invention is not limited by the scope of the invention, and the simple equivalent changes and modifications made by the invention in the scope of the invention and the description of the invention are still within the scope of the invention. 1 is an exploded perspective view of a front side backlight module; FIG. 2 is an exploded perspective view showing a first preferred embodiment of the backlight module of the present invention; FIG. FIG. 4 is a schematic view showing one of a group of lamp groups in the first preferred embodiment; and FIG. 5 is a front view showing a second preferred embodiment of the backlight module of the present invention. , complex φ _, ,, medium luminescent plate into the glossy surface Bending along a long direction into 3 200815865
【主要元件符號說明】 2……·…導光板 21………入光面 211 、 211’ 、 211” ……副入光面 22…… ……出光面 6 ···· 23.·… •…·底面 7 ····, 24··… •…反射部 71 ·… 3…… •…反射片 711 ·· 31 . •…反射面 712 *· 4…… •…下擴散片 713 ·· 5、5,、5，， …………增益片 5 1、51、5 1， 棱鏡部 γ擴散片 光源 LED燈組 <電路基板 LED單元 保護材 12[Description of main component symbols] 2...·...Light guide plate 21.........light incident surface 211, 211', 211"...sub-lighting surface 22.........lighting surface 6 ···· 23.·... ...·Bottom surface 7····, 24··... •...reflecting portion 71 ·... 3... •...reflecting sheet 711 ·· 31 . •...reflecting surface 712 *· 4... •...lower diffusing sheet 713 ·· 5, 5, 5,, ..., gain sheet 5 1, 51, 5 1, prism portion γ diffusion sheet light source LED lamp group < circuit board LED unit protection material 12