200819854 九、發明說明 【發明所屬之技術領域】 本發明是有關於一種直下式發光二極體（Light • ting Diode，LED)背光模組，且特別是有關於一種運用 具有導光圖案的透明板之直下式LED背光模組。 【先前技術】 背光模組主要做為液晶顯示器的光源提供者，由於液晶 本身並不具發光性，因此需藉由背光模組提供光源。背光模 組依光源位置可分成側光式與直下式兩種，前者主要應用於 監視器與筆記型電腦等之中小型面板，後者主要應用於液晶 電視等之大型面板。在傳統大型背光模組中，光源多採用冷 陰極螢光 $且管（Cold Cathode Fluorescent Lamp ; CCFL)。然 而近年來，由於環保意識抬頭，具省電、環保、體積小、色 純度高、堅固及壽命長等優點之發光二極體（LED)可望在不 久將來逐漸取代含汞成分之CCFL。 請參照第1圖，其係根據習知技術所繪示的一種直下式 led月光模組之剖面示意圖。大體而言，led直下式背光 模組100 —般係由複數個LED光源101，設置於led光源 1 〇 1上方之擴散板1 20以及設置於擴散板i 20上方之光學膜 片130所組成。在此直下式led背光模組100外更可設有 塑膠框件或鐵件（圖未緣示），以用來容置彼些LED光源 101、擴散板120及光學膜片130。 上述之L E D光源1 〇 1 —般係以矩陣或其他排列方式設 200819854 於底板102上，J：中危4亡t “ 八底板1 02可例如印刷電路板，使LED 先/原1 01電性連接至底 受到封裝結構_=1?而，由於LED光源101 曰所獒（、的光線〗03多為軸向光，因此 運用在为光模組時容县泮# 參^ 、 易k成、，工、綠、藍三色混光不均的現 船1二了改4此—現象’在考量混光效果與封裝成本下，-又节木用二合-(3如1)LED晶粒的封裝方式，即將三原色 晶粒、綠⑹光LED晶粒與藍⑻光led晶 RGB 载體上’進而形成三合—LED光源，以解決 ΰ二色混光距離較具 · ^ 罕乂長的問超，然而又受限於LED為點光 源’即使已混合成白#， 九/、先強度仍然不均，必須增加模组 厚度才能解決，這使得LED直下式背光模組⑽的厚度盈 :去減少’難以符合輕薄短小的設計需求。另一種解決方式係 错由增加LED光源的數量來提高亮度以增進混光效果；不 過LED光源的數量增加後，成本過高，難為市場接受。此 外，又-種解決方式係藉由增加擴散板12〇霧度以增進混光 政果；不過此舉會造成LED直下式背光模組⑽的輝度下 降0 【發明内容】 有鑑於此，本發明的觀點之一是在提供一種直下式發光 二極體（LED)背光模組，此直下式咖背光模組至少包:複 數個LED光源、透明板及擴散板’其中上述之透明板係設 於彼些LED光源及擴散板之間。透明板具有互相平行之人 光面及出光面’其中人光面及/或出光面可為平滑面或粗链 200819854 面，且入光面係面對於彼些led光源之面。此透明板之入 ^ 出光面上5又有複數個導光圖案，且此些導光圖案係於 每LED光源上方形成相交區，使得LED光源產生之入射 光線經過其上方的相交區時，可於此透明板中產生全反射並 充分混光後，再自上述之出光面射出。 本心月的另—觀點是在提供一種用於直下式LED背光 模組之透明板，盆孫α y 八係/、有互相平行之入光面及出光面，苴中 入以及/或出光面可為平滑面或粗縫面，且入光面係面對 於複數個LBD弁〉7$。a、杀。口丄 數個導光圖宰，且此此板之入光面及出光面上設有複 ”且此二蛉光圖案係於每一 LED光源上方相 交㈣成相交區’使得LED光源之人射光線經過其上方的 ,品$可於此透明板中產生全反射並充分混光後，再自 上述之出光面射出。 根據本电明之上述觀點，提出—種直下式LEd背光模 〆已3 ·複數個led光源、設置於此些LED光源上 方之透明板以及設置於透明板上方之擴散板，其中透明板之 入光面及出光面可為平滑面或粗輪面，且入光面及/或出光 :上設有複數個導光圖案，而此些導光圖案係於每一 LED 源上方相交而形成複數個相交區，藉以使每一 LED光源 y射光線經過其上方的相交區時，於透明板中產生全 ::後再自上述之出光面射出。詳言之，透明板具有互 ;=面及出光面，且其入光面及/或出光面上設有上述 U案。此些導光圖案係於每一 LED光源上方相交而形 成此二相交區。因此LED光源產生之入射光線經過其上方 200819854 的相父區時，可於、乐 了於透明板令產生全反射並充分混光後，再自 上述之出光面射出。 4本發明_較佳實施例，上述之導光圖案可例如複數 3L U溝槽，而此些導光圖案可相交於彼些相交區或其 下方、或分別越過於上述各相交區之上下方處。 ^ ^ 康本1明之其他觀點，提出一種用於直下式LED背 光模、·且之透明板，其中此透明板之人光面及/或出光面上設 有複數個導光圖案’且入光面及出光面可為平滑面或粗趟 面’而，些導光圖案係於每一 LED光源上方相交而形成複 數個相父區’藉以使每一 LED光源產生之入射光線經過其 上方的相交區時’於此透明板中產生全反射後再自上述之出 光面射出。詳言之，透明板具有互相平行之入光面及出光 面:其中入光面係面對於彼些LED光源。此些導光圖案係 於每一 LED光源上方相交而形成此些相交區。led光源之 入射光線經過其上方的相交區時，可於此透明板中產生全反 射並充分混光後，再自上述之出光面射出。 應用上述之直下式LED背光模組時’由於此直下式 LED背光模組係於LED光源及擴散板之間設置透明板，且 此透明板之入光面及出光面上設有複數個導光圖案，且此些 導光圖案係於每一 LED光源上方相交而形成相交區，藉： 使每一 LED光源之入射光線經過其上方的相交區時產2全 反射，可於此透明板中產生全反射並充分混光後，再自上述 之出光面射出。如此一來，可大幅提昇LED光源之混光效 果’解決習知直下式LED背光模組的明暗不均及輝度不足 200819854 等問題。 【實施方式】 本發明的目的就是在提供一種直下式LED背光模組， 以解決習知直下式LED背光模組的明暗不均及輝度不足等 問題。為了使本發明之特徵與技術優勢能有更清楚的呈現， 以下係舉數個直下式LED背光模組作為較佳實施例來加以 詳細說明。 " 晴麥照第2A圖，其係根據本發明較佳實施例所繪示之 、 直下式LED月光模組的剖面示意圖。此直下式lED背光模 組200至少包含複數個LED光源2〇卜設置於led光源 上方之透明板210以及設置於透明板21〇上方之擴散板 220 ’其中透明板210之入光面211及/或出光面213係設有 禝數個導光圖案217，而此些導光圖案217係於每一 led 光源201上方相交而形成複數個相交區214，藉以使每一 LED光源201之入射光線2〇3經過其上方的相交區214時， (； 於此透明板210中產生全反射後再自上述之出光面213射 • 出。 ， 申言之，彼些led光源201之型式不拘，然以三合一 LED光源為較佳。一般而言，彼些LED光源可例如以200819854 IX. Description of the Invention [Technical Field] The present invention relates to a direct-lighting diode (LED) backlight module, and more particularly to a transparent board having a light guiding pattern Straight down LED backlight module. [Prior Art] The backlight module is mainly used as a light source provider of a liquid crystal display. Since the liquid crystal itself is not illuminating, it is necessary to provide a light source by the backlight module. The backlight module can be divided into two types: sidelight type and direct type according to the position of the light source. The former is mainly applied to small and medium panels such as monitors and notebook computers, and the latter is mainly applied to large panels such as LCD TVs. In the traditional large-scale backlight module, the light source is mostly a cold cathode fluorescent lamp (CCFL) and a tube (Cold Cathode Fluorescent Lamp; CCFL). However, in recent years, due to environmental awareness, light-emitting diodes (LEDs) with advantages of power saving, environmental protection, small size, high color purity, robustness and long life are expected to gradually replace CCFLs containing mercury components in the near future. Please refer to FIG. 1 , which is a schematic cross-sectional view of a direct type led moonlight module according to the prior art. In general, the LED direct-lit backlight module 100 is generally composed of a plurality of LED light sources 101, a diffusion plate 110 disposed above the LED light source 1 〇 1, and an optical film 130 disposed above the diffusion plate i20. In addition, a plastic frame member or an iron member (not shown) may be disposed outside the direct-lit LED backlight module 100 for accommodating the LED light source 101, the diffusion plate 120, and the optical film 130. The above-mentioned LED light source 1 〇1 is generally set in matrix or other arrangement on 200819854 on the bottom plate 102, J: Zhongwei 4 death t "eight bottom plate 102 can be, for example, a printed circuit board, so that the LED first / original 01 electrical The connection to the bottom is subject to the package structure _=1?, and since the LED light source 101 is 獒 (, the light ray 03 is mostly axial light, so when used as a light module, Rongxian 泮# ^^, Yikcheng, , the current, green, blue and blue mixed light uneven ship 1 2 has changed 4 - the phenomenon 'in consideration of the mixed light effect and packaging cost, - and the wood use two - (3 such as 1) LED die The packaging method is to form three-primary color crystal grains, green (6) light LED crystal grains and blue (8) light-emitting crystal RGB carriers to form a triple-LED light source to solve the two-color mixed light distance. Q is super, but it is limited by the fact that the LED is a point source. Even if it has been mixed into white #, the intensity is still uneven, and the thickness of the module must be increased to solve the problem. This makes the thickness of the LED direct-lit backlight module (10): To reduce 'difficult to meet the light and short design requirements. Another solution is to increase the number of LED light sources to improve the brightness In order to enhance the light mixing effect; however, after the number of LED light sources increases, the cost is too high, which is difficult for the market to accept. In addition, the solution is to increase the diffusing effect by increasing the haze of the diffuser 12; however, this will result in In view of the above, one of the viewpoints of the present invention is to provide a direct-lit light-emitting diode (LED) backlight module, and the direct-type coffee backlight module is at least Package: a plurality of LED light sources, a transparent plate and a diffusing plate. The transparent plate is disposed between the LED light source and the diffusing plate. The transparent plate has a smooth surface and a light emitting surface parallel to each other. Or the light-emitting surface may be a smooth surface or a thick chain of 200819854, and the light-incident surface is opposite to the surface of the led light source. The transparent light-emitting surface of the transparent plate has a plurality of light guiding patterns, and the light guiding light The pattern forms an intersection region above each LED light source, so that when the incident light generated by the LED light source passes through the intersection region above the LED light source, total reflection can be generated in the transparent plate and fully mixed, and then emitted from the light exit surface. heart Another point of view of the month is to provide a transparent plate for a direct-lit LED backlight module, which has a parallel illuminating surface and a illuminating surface, and the lining and/or the illuminating surface can be Smooth surface or rough surface, and the entrance surface of the light surface is for a plurality of LBD 弁>7$.a, kill. Several light guides are slaughtered, and the plate has a complex surface on the light surface and the light surface And the two light patterns intersect each other (four) in the intersection area of the LED light source, so that the light source of the LED light source passes over the light source, and the product can be totally reflected in the transparent plate and fully mixed, and then According to the above viewpoint of the present invention, it is proposed that a direct type LEd backlight module has 3, a plurality of LED light sources, a transparent plate disposed above the LED light sources, and a diffusion plate disposed above the transparent plate. The light-incident surface and the light-emitting surface of the transparent plate may be a smooth surface or a coarse wheel surface, and the light-incident surface and/or the light-emitting surface are provided with a plurality of light guiding patterns, and the light guiding patterns are attached to each LED source. The upper intersecting forms a plurality of intersecting regions, so that each LED light source y emits light When the intersection area above it is generated, all the :: is generated in the transparent plate and then emitted from the above-mentioned light-emitting surface. In detail, the transparent plate has a mutual surface and a light-emitting surface, and the above-mentioned U case is provided on the light-incident surface and/or the light-emitting surface. The light directing patterns intersect above each of the LED sources to form the two intersecting regions. Therefore, when the incident light generated by the LED light source passes through the phase of the parent region of 200819854, it can be used in the transparent plate to produce total reflection and fully mixed, and then emitted from the above-mentioned light emitting surface. In the preferred embodiment of the present invention, the light guiding pattern may be, for example, a plurality of 3L U grooves, and the light guiding patterns may intersect at or below the intersection regions, or may be respectively above and below the respective intersection regions. At the office. ^ ^ Other views of Kang Ben 1 Ming, proposed a transparent plate for a direct-lit LED backlight module, wherein the transparent plate has a plurality of light guiding patterns on the light surface and/or the light-emitting surface and enters the light The surface and the illuminating surface may be a smooth surface or a rough surface. The light guiding patterns intersect above each LED light source to form a plurality of phase parent regions, so that the incident light generated by each LED light source passes through the intersection thereof. When the zone is totally reflected in the transparent plate, it is emitted from the above-mentioned light-emitting surface. In particular, the transparent plate has mutually parallel entrance and exit surfaces: the entrance surface is for the LED light sources. The light directing patterns intersect above each of the LED sources to form such intersecting regions. When the incident light of the led light source passes through the intersection region above it, it can be totally reflected in the transparent plate and fully mixed, and then emitted from the light exit surface. When the above-mentioned direct-type LED backlight module is applied, 'the direct-lit LED backlight module is provided with a transparent plate between the LED light source and the diffusion plate, and a plurality of light guides are arranged on the light-incident surface and the light-emitting surface of the transparent plate. a pattern, and the light guiding patterns intersect at each of the LED light sources to form an intersection region, by: causing the incident light of each LED light source to pass through the intersection region above it to produce 2 total reflection, which can be generated in the transparent plate After total reflection and full light mixing, it is then emitted from the above-mentioned light-emitting surface. In this way, the light-mixing effect of the LED light source can be greatly improved. </ RTI> The problems of the light and dark unevenness and the lack of brightness of the conventional direct-lit LED backlight module are solved. [Embodiment] The object of the present invention is to provide a direct-lit LED backlight module to solve the problems of light and dark unevenness and insufficient brightness of the conventional direct-lit LED backlight module. In order to provide a clearer representation of the features and technical advantages of the present invention, several direct-lit LED backlight modules are described in detail below as preferred embodiments. " Qing Mai Zhao 2A, which is a cross-sectional view of a direct-lit LED moonlight module according to a preferred embodiment of the present invention. The direct-lit lED backlight module 200 includes at least a plurality of LED light sources 2, a transparent plate 210 disposed above the LED light source, and a diffusing plate 220 disposed above the transparent plate 21', wherein the light-incident surface 211 of the transparent plate 210 and/or Or the light-emitting surface 213 is provided with a plurality of light guiding patterns 217, and the light guiding patterns 217 are intersected above each of the LED light sources 201 to form a plurality of intersecting regions 214, so that the incident light rays of each of the LED light sources 201 are 2 When the 〇3 passes through the intersection area 214 above it, (; after the total reflection occurs in the transparent plate 210, the light-emitting surface 213 is emitted from the above-mentioned light-emitting surface 213. In other words, the types of the LED light sources 201 are not limited, A three-in-one LED light source is preferred. In general, some of the LED light sources can be, for example,
矩陣方式設於底板202上，然本發明不限於此，上述LED 光源201亦可以其他排列方式設於底板2〇2上，其中底板 202可例如印刷電路板，使LED光源2〇丨電性連接至底板 202。 一 9 200819854 透明板21〇之材質可例如屢克力材料、聚碳酸醋材料、 聚苯乙烯材料或環烯烴聚合材料，其係具有互相平行之入光 面211及出光面213，其中入光面2U係面對於彼些LED 先源2(H。-般而言，透明板21〇係利用凸設於底板上 之支撐結構（未緣示）而架設於彼些咖光源训之上方， 並與擴散板220相距-預設高度H，其中此預設高度η係 以介於0至200毫米（mm)之間為較佳。 一〜π 阅，丹γ弟2JB圖係根據第 2A圖之區域240所儉元夕其丄门 ^ 吓日不之局部放大圖。上述導光圖案217 係於每一 L E D光源、2 Ο 1 l· 士 & > ^ , 上方相父而形成彼些相交區2 1 4， 用以使LED光源201產生之入射光線2()3於透明板2㈣ 產生全反射。在本發明一較佳實施例中，上述之入光面 及/或出光面213可為平滑面。然而，在另一較佳實施例中， 入光面211及/或出光面213可經由喷砂製程形成粗链面⑽ 未繪示），以增進透明板21〇之混光效果，進而提昇其出光 均勻度。此外，請參照第2C圖至第2E圖，其係根據本發 明又一較佳實施例所繪示之透明板的局部立體示意圖。在本 發明又一較佳實施例中，上述之入光面211及出光面213 更可分別選擇性設有條狀分布之複數個導光圖案217。此些 導光圖案217可只設於出光面213(如第2C圖所示），亦可 只設於入光面211(如第2D圖所示），或分別設於入光面211 及出光面213(如第2E圖所示）。此些導光圖案217可於透 明板210之製程中一體成型而製得，或於透明板21〇之表面 上經由再加工製得，藉此可大幅提升直下式LED背光模組 10 200819854 2〇0之輝度，減少光學膜片230的使用，更 產成本。 更了有效的降低生 砰而言之，上述導光圖案217 微溝槽2l7a，而上述導光 H锼數個V型（V-Cut) 圖案217設於屮冰上丄 相交於每-LED光源2〇1上方之出光面==⑴時’可 式，此4b導光圊處。另一種方 一 V先圖案217例如複數個v 光面211時，可相I倣溝槽217a設於入 〇11 * 母一 LED光源201上方之入 211。或者，此此導#岡安上万之入光面 分別H:丄 複數個V型微溝槽217a 刀別5又於设於出光面213及入 一咖光源201上方之 =211…可分別越過於每 上万之出先面213及入光面211。 ”=::圖，其係根據第2°圖所綠示之透明板的局 β立體不思圖。以上述之v型微溝槽幻化 如V型（V-Cut)到刀、a旦 為彳’可利用例 ,0 铽衫蝕刻或雷射切削等方式，在透明 ^ 10上形成—道道結構極微小、類似於稜鏡且呈連續均勻 =布=V型微溝槽217a。舉例而言’在本發明的一個例子 中，M LED光源加係以矩陣方式排列時 217例如V型微溝槽心即以十字交錯方式設置^第 2C圖至帛2E圖所示。然而在其他例子中，當LED光源201 係以蜂巢狀排料，此些導光圖案217則彼此約呈的。角交 錯方式設置（圖未纷示），俾使上述導光圖案217相交一 LED光源201上方。 值得-提的是，本發明透明板210上之導光圖案217 係以相交方式增加導光圖案217之密度，且彼些導光圖宰 2^7係相交於每一 LED光源2〇1上方，藉此提昇直下式led 200819854 背光模組·之輝度，故此導光圖案217之相交形式端視其 下方遍光源2(H之排列方式而|，並不限於前述所舉。 入射光線203自入光面211射入透明板21〇後，在透明板 2i〇内反覆反射’並朝向與入射光線加相反方向前進。入 射光線2G3反射時’部分的光線可被透明板21()表面的粗經 面及/或導光圖案217擴散’再從透明板21〇之出光面213 經由擴散板220及光學膜片23〇射出。此外，透明板21〇 的厚度越薄’透明板210内入射光線2〇3的反射次數越多， 相對的從透明板2H)之出光面2n射出的光線也越強。易古 之:利用本發明之透明板2 i 〇進行混光，取代傳統直下式背 光模組以較大之混光距離進行混光的方式，可大幅縮減直下 式LED背光模組200的整體厚度。 在實施時，本發明之直下式LED背光模組扇除了上 述=件外，在擴散板220上方更至少包含一光學膜片23〇, 如第2A圖之所示，其中此光學膜片23〇可運用習知之各種 光學膜片，以調整此直下式LED背光模組2〇〇之光學表現。 再者’此直下式LED背光模組2〇〇亦可視需求再設有塑膠 框件或鐵件（圖未繪示），以用來容置上述LED光源Μ〗、透 明板210、擴散板220及光學膜片23〇。 、由以上本發明數個較佳實施例可知，應用本發明之直下 式LED月光模組時，其優點在於此直下式led背光模組係 於LED光源及擴散板之間設置透明板，且此透明板之入光 面及出光面上設有複數個導光圖案，且此些導光圖案係於每 一 LED光源上方相交而形成相交區，藉以使每一 光源 12 200819854 線經過其上方的相交區時’可於此透明板中產生全 混光後，再自上述之出光面射出。如此-來; 大幅長：汁LED光源之、、曰古4坦 π 、吧先效果，解決習知直下式LED背光 杈、、且的明暗不均或輝度不足等問題。 定本：：本：：已以較佳實施例揭露如上，然其並非用以限 不㈣/ 所屬技術領域中任何具有通常知識者，在The matrix mode is disposed on the bottom plate 202. However, the present invention is not limited thereto. The LED light source 201 may be disposed on the bottom plate 2〇2 in other arrangements. The bottom plate 202 may be, for example, a printed circuit board, so that the LED light source 2 is electrically connected. To the bottom plate 202.九 200819854 The material of the transparent plate 21〇 can be, for example, a acryl material, a polycarbonate material, a polystyrene material or a cyclic olefin polymer material, which has a light-incident surface 211 and a light-emitting surface 213 which are parallel to each other, wherein the light-incident surface 2U façade for some of the LED source 2 (H. - Generally, the transparent plate 21 利用 is erected on the support structure (not shown) protruding from the bottom plate and is placed above the training of the other people, and The diffuser plate 220 is spaced apart from the preset height H, wherein the preset height η is preferably between 0 and 200 millimeters (mm). One to π, the Dan γ brother 2JB image is based on the area of the second drawing 240 俭 夕 夕 丄 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 2 1 4, the incident light 2() 3 generated by the LED light source 201 is totally reflected on the transparent plate 2 (4). In a preferred embodiment of the invention, the light incident surface and/or the light exit surface 213 may be smoothed. However, in another preferred embodiment, the light incident surface 211 and/or the light exit surface 213 may form a thick chain through a sand blasting process. ⑽ not shown) to enhance the transparent plate 21〇 the light mixing effect, thereby enhancing its light uniformity. In addition, please refer to FIG. 2C to FIG. 2E, which are partial perspective views of a transparent plate according to another preferred embodiment of the present invention. In another preferred embodiment of the present invention, the light incident surface 211 and the light exiting surface 213 are respectively selectively provided with a plurality of light guiding patterns 217 distributed in a strip shape. The light guiding patterns 217 may be disposed only on the light emitting surface 213 (as shown in FIG. 2C), or may be disposed only on the light incident surface 211 (as shown in FIG. 2D), or respectively disposed on the light incident surface 211 and the light emitting surface. Face 213 (as shown in Figure 2E). The light guiding patterns 217 can be integrally formed in the process of the transparent plate 210, or can be obtained by reworking on the surface of the transparent plate 21, thereby greatly improving the direct type LED backlight module 10 200819854 2〇 The brightness of 0 reduces the use of the optical film 230 and is more cost effective. In order to effectively reduce the oysters, the light guiding pattern 217 is slightly grooved 2l7a, and the light guiding H 锼 V-Cut pattern 217 is disposed on the 屮 ice and intersects each LED light source. 2出1 above the light surface == (1) when 'can be used, this 4b light guide. When the other V-first pattern 217 is, for example, a plurality of v-planes 211, the phase-injection trench 217a is provided in the entrance 211 of the input light source 201. Or, this guide #冈安的万光光面 H: 丄 a plurality of V-shaped micro-grooves 217a knife 5 is placed on the light-emitting surface 213 and into a coffee source 201 = 211 ... can be more than Every tens of thousands of out of the face 213 and into the light side 211. ”=::Fig., which is based on the local β stereoscopic view of the transparent plate shown in Fig. 2°. The above v-type micro-groove illusion such as V-type (V-Cut) to the knife, a可 'Available examples, 0 etched or laser cut, etc., formed on the transparent ^ 10 - the track structure is extremely small, similar to 稜鏡 and continuous uniform = cloth = V-type micro-trench 217a. For example In an example of the present invention, when the M LED light sources are arranged in a matrix manner, for example, the V-type micro-trench cores are arranged in a cross-staggered manner, as shown in the second to fourth diagrams. However, in other examples, When the LED light source 201 is arranged in a honeycomb shape, the light guiding patterns 217 are arranged adjacent to each other. The angles are arranged in an interlaced manner (not shown), so that the light guiding patterns 217 are intersected above one of the LED light sources 201. It is noted that the light guiding pattern 217 on the transparent plate 210 of the present invention increases the density of the light guiding pattern 217 in an intersecting manner, and the light guiding patterns 2^7 are intersected above each LED light source 2〇1, This enhances the brightness of the direct-lit LED 200819854 backlight module, so the intersection form of the light guiding pattern 217 is viewed from below. The source 2 (the arrangement of H) is not limited to the above. The incident light ray 203 is incident on the transparent plate 21〇 from the light incident surface 211, and is reflected in the transparent plate 2i〇 and is oriented in the opposite direction to the incident light. When the incident light 2G3 is reflected, part of the light can be diffused by the rough surface of the transparent plate 21 () and/or the light guiding pattern 217, and then the light emitting surface 213 from the transparent plate 21 passes through the diffusion plate 220 and the optical film. In addition, the thinner the thickness of the transparent plate 21〇, the more the number of reflections of the incident light 2〇3 in the transparent plate 210, the stronger the light emitted from the light-emitting surface 2n of the transparent plate 2H). The use of the transparent plate 2 i 本 of the present invention for light mixing can replace the traditional direct-type backlight module to mix light with a large mixed light distance, and the overall thickness of the direct-lit LED backlight module 200 can be greatly reduced. In the implementation, the direct-type LED backlight module fan of the present invention further comprises at least one optical film 23 上方 above the diffusion plate 220, as shown in FIG. 2A, wherein the optical film 23 〇 Use a variety of optical diaphragms to adjust this straight The optical performance of the lower-type LED backlight module 2。. In addition, this direct-lit LED backlight module 2〇〇 can also be provided with plastic frame parts or iron pieces (not shown) for receiving. The LED light source 、, the transparent plate 210, the diffusion plate 220, and the optical film 23〇. According to the above several preferred embodiments of the present invention, when the direct-lit LED moonlight module of the present invention is applied, the advantages are as follows. The LED backlight module is provided with a transparent plate between the LED light source and the diffusion plate, and a plurality of light guiding patterns are arranged on the light incident surface and the light emitting surface of the transparent plate, and the light guiding patterns are attached to each LED light source. The upper intersections form an intersection region, so that each light source 12 200819854 passes through the intersection region above it, and then the full light is mixed in the transparent plate, and then the light exit surface is emitted. So-to-have; large-length: juice LED light source, 曰古四坦 π, first effect, to solve the problem of conventional direct-lit LED backlight 杈, and the uneven brightness or lack of brightness. The present invention has been disclosed above in the preferred embodiment, but it is not intended to be used in any of the technical fields of the art.
Ltli 精神和範圍内，#可作各種之更動與潤飾， 為準。H護範圍當視後附之申請專利範圍所界定者 【圖式簡單說明】 本發明的較佳實施例已於前載 圖式作更詳細的闡述 〜口几％人于 其中： 一種直下式LED背光 第1圖係根據習知技術所繪示的 模組之剖面示意圖； 北第2A圖係根據本發明較佳實施例所繪示之直下式led 背光模組的剖面示意圖； 第2B圖係根據帛2八圖之區域24〇所纷示之局部放大 第2C圖至第2E圖，其係根據本發明又一較佳實施例 所綠不之透明板的局部立體示意圖；以及 弟2F圖係根據第2C圖所繪示之透明板的局部立體示 13 200819854 【主要元件符號說明】 100 ： LED直下式背光模組 101 ： 102 ： 底板 103 ： 120 ： 擴散板 130 ： 200 ： LED直下式背光模組 201 ： 202 ： 底板 203 ： 210 ： 透明板 211 ： 213 ： 出光面 214 ： 217 ： 導光圖案 217a 220 ： 擴散板 230 ： 240 ： 區域 Η ： f LED光源 光線 光學膜片 LED光源 入射光線 入光面 相父區 :V型微溝槽 光學膜片 ί設高度 14Within the spirit and scope of Ltli, # can be made into a variety of changes and retouching, whichever is the case. H protection range is defined by the scope of the appended patent application [Simplified description of the drawings] The preferred embodiment of the present invention has been described in more detail in the front loading pattern. 1A is a schematic cross-sectional view of a module according to a preferred embodiment of the present invention; FIG. 2B is a cross-sectional view of a direct-lit LED backlight module according to a preferred embodiment of the present invention; 2A to 2E, which is a partial perspective view of a green transparent plate according to still another preferred embodiment of the present invention; and a 2F drawing according to another embodiment of the present invention. Partial perspective view of the transparent plate shown in FIG. 2C 200819854 [Description of main component symbols] 100: LED direct backlight module 101: 102: bottom plate 103: 120: diffusion plate 130: 200: LED direct backlight module 201 : 202 : bottom plate 203 : 210 : transparent plate 211 : 213 : light emitting surface 214 : 217 : light guiding pattern 217a 220 : diffusing plate 230 : 240 : area Η : f LED light source optical film LED light Xiangfu incident light into the surface region: V-type micro channel 14 the height of the optical film provided ί