201005387 九、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’特別是關於一種在背光模組 之一底座之相對二侧邊設有二階梯侧壁以供與一液晶面板直 接進行組裝之背光模組。 【先前技術】 背光模組通常包含有一外框，外框内容置一光源組及一光 ❹ 學膜片組’其中光源組發射出光線，通過由擴散板及各種不同 功能之光學膜片所組成的光學膜片組而投射至一液晶面板 上，以提供液晶面板所需的背光光源。第1圖中顯示出一種習 甩之背光模組的分解立體圖，習用之背光模組包含有一底座 801、一光源組802、一光學膜片組803及一背光模組外框804。 底座801具有一背板811，以及相對之二第一側邊8〇la及相 對之二第二侧邊801b。二第一側邊801a上分別設有二側壁 ❿ 812，而二第二側邊801b上則分別設有二卡合側壁813，且背 板811、二侧壁812及二卡合側壁813共同形成一容置空間 801c。二側壁812通常由背板811之材料延伸彎折而形成。二 卡合侧壁813通常為塑膠射出成型件，其每一者之内側面開設 有一~^合槽831。光源組802係設於容置空間801c内。光學 膜片組803設於光源組802之上方’且具有相對之二第一光學 膜片侧邊803a及相對之二第二光學膜片側邊8〇3b，二第一光 學膜片側邊803a是分別由側壁812之支撐緣821所支撐，二 5 201005387 第二光學膜片侧邊803b則卡固於卡合侧壁813之卡合槽831 内。 請再參照第1、2A及2B圖所示，其揭示一種習用背光模 組之局部組合剖視圖，底座801與光學膜片組803之外部再套 设背光模組外框804，用以構成一完整之背光模組。在背光模 組外框804之頂面内緣設有緩衝條895，用以構成一具有緩衝 功能之接觸面’以保護將放置於接觸面上方之組件。背光模組 ❹ 外框804提供保護及固定底座801與光學膜片組803之功能， 也便於裝運背光模組，使背光模組能運送到下一個地點進行組 裝。 請再參照第3圖所示，其揭示一種習用背光模組與一液晶 面板805之局部組合剖視圖，液晶面板8〇5是組裝於背光模組 的上方，而以液晶面板8〇5之底部接觸支撐緩衝條的5，因此 支撐緩衝條895可避免脆弱之液晶面板8〇5因組裝之壓力而破 裂。另外，一顯示器模組外框8〇6則套設於背光模組與液晶 板805之組合的外部’不但可將液晶面板5固定於背光模組之 上，也使整個組件成為一完整的液晶顯示模組。 然而，如上述之背光模組外框為背光模組最大尺寸之零 件，相對的也佔有不少之材料與組裝成本，同時亦增加零件物 料管理的複雜度。故，有必要思考如何提供一種背光模組，以 省略習用之背光模組外框，而直接與一液晶面板進行組裝，以 解決習用之背光模組存在的組裝成本及物料管理等問題。 【發明内容】 6 201005387 本發明-實_在於提供—種f光·，縣模組之一底 座之相對一側邊設有二階梯側壁以供與一液晶面板直接進行 組裝，使背光模組能節省製造成本與提高組裝之效率。 本發明-實_在於提供-種f光模組，縣敝之二階 梯侧壁之第-階表面設有定位孔，在光學膜片組設有相對應之 定位孔’在定位孔間穿設一定位銷，使光學膜片組定位於第一 階表面上，使本發明具有準確及快速定位光學膜片組之功能。 φ 本發明—實施例在補^供—種tsu f絲組與液晶 面板之接觸面設有緩衝條，以保護液晶面板，使背光模組具有 安全組裝及防震之功效。 本發明的其他目的和優點可以從本發明所揭露的技術特 徵中得到進一步的瞭解。 為達上述之一或部份或全部目的，本發明一實施例提供一 種背光模組，包含有：一底座、光源組以及一光學膜片組，底 ，座包含有一背板及二階梯側壁，該背板具有相對之二第一側邊 及相對之二第二側邊；二階梯侧壁，分別設於背板之該些第一 侧邊’且每一階梯側壁具有相連之一第一階表面與一第二階表 面，其中第二階表面之高度高於第一階表面之高度，且背板及 該些階梯侧壁形成一容置空間。光源組設置於容置空間内。光 學膜片組位於光源組之上方’且光學膜片組之相對兩侧邊分別 設置於階梯側壁之第一階表面上。本發明之實施例在一背光模 組之一底座的相對二侧邊設有二階梯侧壁，每一階梯侧壁分別 包含一支撐顯示器模組外框之第二階表面，及一支撐内部光學 201005387 膜片組與液晶面板之第一階表面，故在不需另設一背光模組外 框的刖題下’即可直接與一液晶面板進行組裝。因此，本發明 之實施例確實能簡化背光模組之構造，進而節省製造成本與提 高組裝之效率。 為讓本發明之上述特徵和優點能更明顯易懂，下文特 舉實施例，並配合所附圖式，作詳細說明如下。 【實施方式】 下列各實施例的說明是參考附加的圖式，用以例示本發明 可用以實施之特定實施例。本發明所提到的方向用語，例如 「上」、「下」、「前」、「後」、「左」、「右」等，僅是參考附加圖 式的方向。因此’本發明以下實施例中所提到的方向用語是用 來說明本發明，而非用來限制本發明。 請參照第4圖所示之本發明一實施例之背光模組的分解 立體圖，本發明之實施例的背光模包含有一底座丨、一光源組 2及一光學膜片組3。在本實施例中，底座1具有略呈矩形的 結構’底座1包含一背板11及二階梯側壁。背板u具有 相對之二第一側邊la及相對之二第二側邊lb。該些侧壁14 分別設於該些第一侧邊la，’而底座1更包含二卡合側壁η , 且該些卡合側13壁分別設置於該些第二侧邊比，因此背板 11、該些階梯侧壁14及該些卡合侧壁13共同形成一容置空間 ’可供光源組2容置於容置空間内。 201005387 請參照第5圖’其中顯示出本發明一實施例之背光模組底 座階梯側壁的局部立體圖，每一階梯側壁14具有透過一表面 142相連之一第二階表面141及一第一階表面143，，第一階 表面143位於第二階表面141的下方，亦即第二階表面141之 高度高於第一階表面143之高度。階梯侧壁η較佳是與背板 11形成為一體，例如由背板1之材料延伸彎折而形成，在本 實施例中’背板1是由一金屬板所構成，而階梯侧壁14亦由 0 金屬板彎折而成。在背板11的内面可選擇性地加設一反射層 (未標號）’以提高容置空間1c内之光線反射效果。 卡合侧壁13可由任何適當的材料製做，最好是塑膠材料 的射出成型件’設置於背板11的第二側邊上而連接於二階 梯侧壁14之間。卡合侧壁13具有一頂面及一-合槽131，大 致上對應於階梯側壁14的第一階表面143。 如第4圖所示，在本實施例的背光模組中，光學膜片組3 _ 係设置於光源組2之上方，且光學膜片組3至少包含有一擴散 板31，光學膜片組3具有相對之二第一光學膜片侧邊知及相 對之二第二光學膜片側邊3b，分別對應於底座1的二階梯侧 壁14及二卡合侧壁13。光學膜片組3可依需要而進一步包含 有至少一光學膜片32，疊合於擴散板31上，使擴散板31位 於光源組2與光學膜片32之間。基於此種4合的關係，在下 文申，為簡化說明起見，“第一光學膜片侧邊3a”及“第二 ^學膜片側邊3b”係同時代表由擴散板 31及光學膜片32疊 α在一起而形成的光學膜片組3、或是擴散板31、或是光學膜 201005387 * 片32個別的侧邊。 3光學臈版3 (或是擴散板的二第-光學膜片側邊 a疋刀別由底座丨的階梯側壁14之第—階表面⑷所支撲， *第—S學膜片侧邊3b則是卡合於底座1的二卡合侧壁Η之 卡合槽131内。 在光學膜片組3與階梯側壁14、二卡合側壁13之組合過 程中’有可能會因零件尺寸公差與裕度而不容易保持精準，針 ❹ 對此’如第4 ®麻，底座丨之至少—階梯讎14的 第階表面143上開設至少一第一定位孔144，此第一定位孔 144最好疋一貫穿孔或是設有内螺紋的螺孔。在帛4圖所示的 實=例卜底座1的二階梯侧壁14僅有-者的第—階表面143 上設置第一定位孔144，而另一階梯侧壁14上則未設置第一 疋位孔’且在本實施例中’該一階梯側壁14的第一階表面143 上係設置三個第一定位孔144，這些第一定位孔144沿著第一 | 階表面143分隔開（最好是等間距）設置。但可以理解的，如 有需要，亦可於底座1的每-階梯碰14的第-階表面143 上均設置一個或多個第一定位孔144，而該些階梯側壁14上 的第一定位孔可以對稱或非對稱設置。 對應於每—第―定位孔144，在擴散板31 _對應第一 光學膜片侧邊3a邱設有-第二定位孔3n，此第二定位孔 311可以疋—貫穿孔或是一缺口。一定位銷33穿過擴散板31 的每一第二定位孔311，並結合於階梯側壁14之第一階表面 143上的第一定位孔144内，以將擴散板31定位並固定於第 201005387 -階表面M3上。在階梯侧壁14之第—階表面i43上的第— 定位孔144為設有内螺紋的螺孔時，定位銷％上可以設置外 螺紋（未顯示以供與第一定位孔144的内螺紋螺合，或者 在第定位孔144為貫穿孔時，定位銷143亦可設有外螺紋， 以供螺合-螺帽（未_ );再或者，定位銷％可以卿接方式 將擴散板31固定於階梯側壁μ上。 在光學膜片組3除了擴散板31以外另包含有光學膜片幻 ❹ 的情形中，光學膜片32可透過任何適當的方式固定至擴散板 31上’或者如第4圖所示’在本實施例中，光學膜片犯上對 應於階梯讎丨4的第-光學膜片側邊知上開設至少一第三定 位孔321，對應於階梯側壁14上的至少一第一定位孔144或 是對應於_讎14上的每―第—定魏144。該第三定位 孔321較佳為-缺口，但亦可為一貫穿孔或其他適合的結構。 定位銷33則依序穿過光學膜片％之第三定位孔Μ卜紐板 齡 31之第二定位孔311及階梯側壁14之第一階表面143上的第 一定位孔144，以將光學膜片32及擴散板Μ定位並固定於階 梯側壁14的第一階表面143上。以此方式，可以藉由定位銷 33及第-、第二、第三定位孔144、川、321來準確且快速 定位光學膜片組3的組裴於底座1上。 請參照第4、6A及6B圖所示，在本發明一實施例的背光 模組中’光學膜片組3之二第—光學膜片側邊如的至少一者 上設有至少-第-支魏触a，林實施射，光學膜片組 3的每-第-光學則侧邊3a上触有_第—支撐緩衝條&。 201005387 另外，在圖中所示的實施例中，光學膜片組3包含有光學膜片 32 ’疊置於擴散板31上’因此第一支撐緩衝條a係設置於光 學膜片32的上方表面上。為能得到適當的力量支撐，第一支 樓緩衝條a的設置位置是位於底座1之階梯侧壁14的第一階 表面143上方’使光學膜片組3位於第一支撐緩衝條&及底座 1之階梯侧壁14的第一階表面143之間，如第6A圖中所示。 另外，對應於設置在光學膜片組3上的定位銷33，第一 支擇緩衝條a上可錢置有？减缺，賴容峡位銷％。 在本實施例中’第-支樓緩衝條a係分約成為數個片段，相鄰 二片段間形成一缺口（未標號），以容納定位銷33於其内。另 -方面’在本實施例中’定位銷33僅設置於光學膜片組3的 二第-光學膜片侧邊3a之-者上，因此另—第—光學膜片側 邊3a上若亦設有第一支稽緩衝條a，則此另一第一光學膜片側 邊3a上的第-支撐緩衝條&可以是完整單條的結構，無需因 應定位銷33而分割成數個片段。 再者’卡合側壁之頂面上設有至少—第二支撐緩衝條 b，且光學膜片組3上的第一支撐緩衝條a及卡合側壁13上的 第-支撐麟條b二者在垂直方向上的尺寸（高度）係可使第 -及第二支賴衝條a、b的上方表面制構成-支撐接觸 面’將用以承載-平板狀元件，例如一液晶面板（未顯示）。 但第-支撐缓衝條a及第二支魏衝條b的上方表面的高度應 低於階梯讎14之$二階表面141的高度，以確保能在光學 膜片組3及第第—支樓緩衝條a、b上方形成-可供放置 12 201005387 液晶面板之組裝空間，且液晶面板可由階梯側壁14的表面i42 加以定位。 第一及第二支撐緩衝條a、b是由撓性或軟性材料或是可 彈性變形材料製做’用以對被支樓於第一及第二支擇緩衝條 a、b上的液晶面板提供緩衝、避震及保護等功用。適合用於 製做第-及第二支標緩衝條a、b之材料的例子包括有橡勝。 這些支標緩衝條a、b可以由任何已知的技術來加以固定在光 ❹ 學膜片組3及卡合侧壁13的頂面上，例如可在支撐緩衝條a、 b上加設一層背膠，藉以黏合於光學膜片組3及卡合侧壁 的頂面上。 另外，階梯侧壁14之表面142上設有一限位緩衝條c， 可供對應並抵接液晶面板，做為液晶面板關向防護緩衝裝 置。限位緩衝條c亦是由撓性或軟性材料或可彈性變形材料製 成，例如橡膠，且係由適當的方式加以固定在階梯侧壁14的 表面142上，例如設置背膠來加以黏合至表面142上。 m 睛再參照第7圖所示之本發明一實施例之背光模組與一 平板狀元件（如液晶面板）之局部組合剖視圖，其中平板狀元 件或液晶面板是以虛線繪示，並以標號5加以標示。如第7周 中之背光模組與-平板狀元件（液晶面板）組合狀態所示，在 組裝時’是將液晶面板5放置於由光學膜月組3及第一、第二 支撐緩衝條a、b上方所界定出的组裝空間内，並由第一、第 二支撐缓衝條a、b加以支撐於光學膜片組3的上方。接著再 於液晶面板5的外部套設一顯示器模組外框6，以構成一完整 13 201005387 的液晶顯示模組。在此’液晶面板5係組裝於光學膜片組3上 方之組裝空_，且由第—支雜衝條a及第二支魏衝條b 所共同支撐’第-支撲緩衝條a及第二支撑緩衝條b可提供緩 衝及保護的功能，防止液晶面板5因組裝之壓合力而破裂。另 外，液晶面板5之侧邊與限位緩衝條c相抵接，因此限位緩衝 條c可防止液晶面板5之側邊與階梯侧壁14之表面丨犯直接 接觸，避免關驗晶面板與其他硬f表面，制是金屬材質 直接接觸時，因碰撞或震動而造成損壞。 請再參照第8圖所示之本發明另一實施例之背光模組與 液晶面板之局部組合剖視圖，相較於本發明顯示於第7圖内的 前-實施例，本發明之此另一實施例的支撑緩衝條&不是設在 光學膜片組3之第一光學膜片侧邊3a上，而是直接設在階梯 侧壁14之第一階表面143上，且第一支樓緩衝條&之高度較 佳係大於光學膜片組3之高度，以使第一支撐緩衝條a的上方 表面高於光學膜片組3。目時，第一支揮緩衝條a之位置是位 於階梯側壁14之表面142與光學膜片組3之第一光學膜片側 邊3a之間。藉此，可使得液晶面板5之^量與組裝之壓合力 不會施加在光學組3上，妓施加在更為堅@之階梯侧壁 14之第一階表面143上。 特別值得-提的是，通常-般财之液晶顯示^之組裝步 驟’都疋先在背光模組廠完成背光模組之組裝再運到另一處進 行與液晶面板之組裝。因此，必須在背光模組之外部加裝一外 框’以便於固定及裝運背光模組。但在本發明之實施例甲，除 201005387 了能使用上述之組裝步驟來實施外，組裝步驟也可於同一地點 進行，即同時將背光模組、液晶面板與顯示賭組外框組裝為 一成品’不但節省一背光模組之外框的製造與組裝成本，也提 高了整體之組裝效率。 因此’相較於習用之背光模組必需在一底座及一光學膜片 組外再套設-背光模組外框，才能與一液晶面板進行組裝。第 4圖所示之本發明之實施例藉由設於底座之相對二侧緣之二階 〇 梯侧壁，二階梯侧壁之第一階表面支擇一光學膜片組，並形成 一組裝空間承載-液晶面板。藉此，背光模組不需再額外套設 一背光模組外框，研直接與-液晶面板進行組裝，有效的簡 化背光模組之構造。 综上所述，本發明確已符合發明專利之要件，爰依法提出 專利申請。惟，本發明已以較佳實施例揭露如上，然其並非用 以限定本發明，任何所屬技術領域中具有通常知識者在不脫 象離本發明之精神和範圍内，當可作些許之更動與潤飾，因此本 發明之保護範圍當視後附之申請專利範圍所界定者為準。另 外，本發_任-實施例或巾請專利範圍不須達成本發明所揭 露之全部目的或優點或特點。此外，摘要部分和標題僅是用來 辅助專利文件搜尋之用，並非用來限制本發明之權利範圍。 【圖式簡單說明】 第1圖是一種習用背光模組之分解立體圖。 第2A圖是一種習用背光模組之局部組合剖視圖。 第2B圖是一種習用背光模組之局部組合剖視圖。 15 201005387 第3圖是一種習用背光模組與液晶面板之局部組合剖視 圖。 第4圖是本發明一實施例之背光模組之分解立體圖。 第5圖是本發明一實施例之階梯侧壁之局部立體圖。 第6A圖是本發明一實施例之階梯侧壁之局部組合剖視 圖。 第6B圖是本發明一實施例之卡合侧壁之局部組合剖視 圖。. 第7圖是本發明一實施例之背光模組與液晶面板之局部 組合剖視圖。 第8圖是本發明另一實施例之背光模組與液晶面板之局 部組合剖視圖。 【主要元件符號說明】 1 底座 11 背板 la 第一側邊 lb 第二側邊 lc 容置空間 12 側壁 121 支撐緣 13 卡合側壁 131 卡合槽 14 階梯側壁 141 第二階表面 142 表面 143 第一階表面 144 第一定位孔 2 光源組 3 光學膜片組 31 擴散板 311 第二定位孔 32 光學膜片 321 第三定位孔 201005387 33 定位銷 3a 第一側邊 3b 第二侧邊 4 背光模組外框 5 液晶面板 6 顯示器模組外框 801 底座 801a 第一侧邊 801b 第二側邊 801c 容置空間 802 光源組 803 光學膜片組 803a 第一侧邊 803b 第二侧邊 804 背光模組外框 805 液晶面板 806 顯示器模組外框 811 背板 812 侧壁 813 卡合侧壁 821 支撐緣 831 卡合槽 895 緩衝條 a 第一支撐緩衝條 b 第二支撐緩衝條 c 限位緩衝條201005387 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a liquid crystal panel provided with two stepped sidewalls on opposite sides of a base of a backlight module. Directly assembled backlight module. [Prior Art] The backlight module usually includes an outer frame, and the outer frame is provided with a light source group and a photo diaphragm group. The light source group emits light, and is composed of a diffusion plate and optical films of various functions. The optical film set is projected onto a liquid crystal panel to provide a backlight source required for the liquid crystal panel. FIG. 1 is an exploded perspective view of a conventional backlight module. The conventional backlight module includes a base 801, a light source group 802, an optical film group 803, and a backlight module outer frame 804. The base 801 has a back plate 811, and two opposite first side edges 8a and two opposite second side edges 801b. Two first side walls 801a are respectively provided with two side walls 812, and two second side sides 801b are respectively provided with two engaging side walls 813, and the back plate 811, the two side walls 812 and the two engaging side walls 813 are formed together. A housing space 801c. The two side walls 812 are generally formed by bending and extending the material of the backing plate 811. The two engaging side walls 813 are generally plastic injection molded parts, and each of the inner side surfaces has a fitting groove 831. The light source group 802 is disposed in the accommodating space 801c. The optical film set 803 is disposed above the light source group 802 and has two opposite first optical film side edges 803a and two opposite second optical film side edges 8〇3b, and two first optical film side edges 803a. The second optical film side 803b is fastened in the engaging groove 831 of the engaging side wall 813. Referring to FIG. 1 , 2A and 2B , a partial sectional view of a conventional backlight module is disclosed. The base 801 and the outer portion of the optical film set 803 are further provided with a backlight module outer frame 804 for forming a complete Backlight module. A buffer strip 895 is provided on the inner edge of the top surface of the backlight module outer frame 804 for forming a buffering contact surface to protect the components to be placed above the contact surface. Backlight Module ❹ The outer frame 804 provides the functions of protecting and fixing the base 801 and the optical film set 803, and also facilitates the shipment of the backlight module, so that the backlight module can be transported to the next place for assembly. Referring to FIG. 3 again, a partial sectional view of a conventional backlight module and a liquid crystal panel 805 is disclosed. The liquid crystal panel 8〇5 is assembled above the backlight module and contacts the bottom of the liquid crystal panel 8〇5. The baffle 5 is supported, so that the baffle 895 is supported to prevent the fragile liquid crystal panel 8〇5 from being broken by the pressure of assembly. In addition, a display module outer frame 8〇6 is sleeved on the outside of the combination of the backlight module and the liquid crystal panel 805. In addition, the liquid crystal panel 5 can be fixed on the backlight module, and the whole component becomes a complete liquid crystal. Display module. However, as described above, the outer frame of the backlight module is the largest part of the backlight module, which also occupies a considerable amount of material and assembly costs, and also increases the complexity of the management of the parts and materials. Therefore, it is necessary to think about how to provide a backlight module to omit the conventional backlight module frame and directly assemble it with a liquid crystal panel to solve the assembly cost and material management problems of the conventional backlight module. SUMMARY OF THE INVENTION 6 201005387 The present invention-real is to provide a kind of f-light, one side of a base of the county module is provided with two stepped side walls for direct assembly with a liquid crystal panel, so that the backlight module can Save manufacturing costs and increase assembly efficiency. The present invention is a method for providing a f-light module, wherein a first-order surface of a stepped sidewall of the county is provided with a positioning hole, and a corresponding positioning hole is disposed in the optical film group to be disposed between the positioning holes. A locating pin that positions the optical film set on the first step surface provides the present invention with the ability to accurately and quickly position the optical film set. φ The present invention—in the embodiment, is provided with a buffer strip on the contact surface of the tsu f wire group and the liquid crystal panel to protect the liquid crystal panel, so that the backlight module has the functions of safe assembly and shockproof. Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. To achieve one or a part or all of the above, an embodiment of the present invention provides a backlight module, including: a base, a light source group, and an optical film set. The bottom portion includes a back plate and two stepped sidewalls. The back plate has two opposite first side edges and two opposite second side edges; the two step side walls are respectively disposed on the first side edges of the back board and each step side wall has a first step connected The surface and a second step surface, wherein the height of the second step surface is higher than the height of the first step surface, and the back plate and the step side walls form an accommodating space. The light source group is disposed in the accommodating space. The optical film set is located above the light source group and the opposite side edges of the optical film set are respectively disposed on the first step surface of the stepped side wall. Embodiments of the present invention provide two stepped sidewalls on opposite sides of a base of a backlight module, each of the stepped sidewalls respectively including a second-order surface supporting the outer frame of the display module, and a supporting internal optical 201005387 The first step surface of the diaphragm group and the liquid crystal panel, so it can be directly assembled with a liquid crystal panel without the need to set a frame of the backlight module. Therefore, the embodiment of the present invention can simplify the construction of the backlight module, thereby saving manufacturing costs and improving assembly efficiency. The above described features and advantages of the present invention will be more apparent from the following description. The following description of the various embodiments is intended to be illustrative of the specific embodiments of the invention. The directional terms mentioned in the present invention, such as "upper", "lower", "before", "after", "left", "right", etc., are merely directions in which additional drawings are referred. Therefore, the directional terms used in the following examples of the invention are intended to illustrate the invention and not to limit the invention. Referring to FIG. 4, an exploded perspective view of a backlight module according to an embodiment of the present invention includes a base cymbal, a light source group 2, and an optical film group 3. In the present embodiment, the base 1 has a slightly rectangular structure. The base 1 includes a back plate 11 and two stepped side walls. The backing plate u has two opposite first side edges la and two opposite second side edges lb. The side walls 14 are respectively disposed on the first side edges 1a, and the base 1 further includes two engaging side walls η, and the engaging side 13 walls are respectively disposed on the second side edges, so the back plate 11. The stepped sidewalls 14 and the latching sidewalls 13 together form an accommodating space ′ for the light source group 2 to be accommodated in the accommodating space. 201005387 Please refer to FIG. 5, which is a partial perspective view showing a stepped side wall of a backlight module according to an embodiment of the present invention. Each stepped sidewall 14 has a second step surface 141 and a first step surface connected through a surface 142. 143, the first step surface 143 is located below the second step surface 141, that is, the height of the second step surface 141 is higher than the height of the first step surface 143. The stepped side wall η is preferably formed integrally with the backing plate 11, for example, by extending and bending the material of the backing plate 1. In the present embodiment, the 'backing plate 1 is formed of a metal plate, and the stepped side wall 14 is formed. Also made of 0 metal plate bent. A reflective layer (not labeled) can be selectively added to the inner surface of the backing plate 11 to enhance the light reflecting effect in the accommodating space 1c. The engaging side walls 13 may be formed of any suitable material, preferably an injection molded member of plastic material disposed on the second side of the backing plate 11 and connected between the second stepped side walls 14. The engaging side wall 13 has a top surface and a merging groove 131, which substantially corresponds to the first step surface 143 of the step side wall 14. As shown in FIG. 4, in the backlight module of the embodiment, the optical film group 3_ is disposed above the light source group 2, and the optical film group 3 includes at least one diffusion plate 31, and the optical film group 3 The two second optical film side edges 3b are opposite to the opposite sides of the first optical film, respectively corresponding to the two stepped side walls 14 and the two engaging side walls 13 of the base 1. The optical film group 3 may further include at least one optical film 32 as needed to be superposed on the diffusion plate 31 such that the diffusion plate 31 is positioned between the light source group 2 and the optical film 32. Based on such a 4-way relationship, in the following description, for the sake of simplicity, the "first optical film side 3a" and the "second optical film side 3b" are simultaneously represented by the diffusion plate 31 and the optical film. The sheet 32 is formed by stacking the optical film group 3 formed by α together, or the diffusing plate 31, or the optical film 201005387 * the individual side of the sheet 32. 3 optical 臈 plate 3 (or the second side of the diffuser plate - the side edge of the optical film a 疋 别 别 别 别 别 , , , * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Then, it is engaged in the engaging groove 131 of the two engaging side wall Η of the base 1. During the combination of the optical film set 3 and the stepped side wall 14 and the two engaging side walls 13, it may be due to the dimensional tolerance of the part. The margin is not easy to maintain accuracy, and the at least one first positioning hole 144 is formed on the first surface 143 of the step 雠 14 such as the fourth cymbal, at least the base 丨 14 , and the first positioning hole 144 is preferably疋 a permanent perforation or a screw hole provided with an internal thread. A first positioning hole 144 is provided on the first step surface 143 of the two stepped side wall 14 of the base 1 of the base 1 shown in FIG. The first stepped hole is not disposed on the other stepped side wall 14 and three first positioning holes 144 are disposed on the first step surface 143 of the stepped side wall 14 in the embodiment. The apertures 144 are spaced apart (preferably equally spaced) along the first |step surface 143. However, it is understood that, if desired, the base 1 One or more first positioning holes 144 are disposed on the first-order surface 143 of the step bump 14 , and the first positioning holes on the step side walls 14 may be symmetrically or asymmetrically disposed. Corresponding to each—the first positioning hole 144, in the diffusion plate 31_ corresponding to the first optical film side 3a, there is a second positioning hole 3n, the second positioning hole 311 can be a through hole or a notch. A positioning pin 33 passes through the diffusion plate Each second positioning hole 311 of the 31 is coupled to the first positioning hole 144 on the first step surface 143 of the stepped sidewall 14 to position and fix the diffusion plate 31 on the 201005387-order surface M3. When the first positioning hole 144 on the first-order surface i43 of the side wall 14 is a screw hole provided with an internal thread, the positioning pin may be provided with an external thread (not shown for screwing with the internal thread of the first positioning hole 144). Or when the positioning hole 144 is a through hole, the positioning pin 143 may also be provided with an external thread for the screw-nut (not _); or, the positioning pin % can fix the diffusion plate 31 to the splicing manner The optical film group 3 includes an optical film in addition to the diffusion plate 31. In the case of ❹, the optical film 32 can be fixed to the diffusion plate 31 by any suitable means 'or as shown in Fig. 4'. In the present embodiment, the optical film commits the first optical corresponding to the step 雠丨4. At least one third positioning hole 321 is defined in the side of the diaphragm, corresponding to at least one first positioning hole 144 on the step side wall 14 or corresponding to each of the first wei 144 on the _ 雠 14 . The hole 321 is preferably a notch, but may be a permanent perforation or other suitable structure. The positioning pin 33 sequentially passes through the third positioning hole 311 of the third positioning hole of the optical film A first positioning hole 144 is formed in the first step surface 143 of the stepped sidewall 14 to position and fix the optical film 32 and the diffusion plate 于 on the first step surface 143 of the stepped sidewall 14. In this way, the set of the optical film groups 3 can be accurately and quickly positioned on the base 1 by the positioning pins 33 and the first, second, third positioning holes 144, Chuan, and 321 . Referring to FIGS. 4, 6A and 6B, in the backlight module according to an embodiment of the present invention, at least one of the side edges of the optical film group 3 and the optical film is provided at least one- When the Wei touches a, the forest performs the shot, and the per-the-optical side of the optical film group 3 touches the _th-support buffer strip & 201005387 In addition, in the embodiment shown in the figures, the optical film set 3 includes an optical film 32' stacked on the diffusion plate 31. Thus, the first support buffer a is disposed on the upper surface of the optical film 32. on. In order to obtain proper power support, the first floor buffer strip a is disposed above the first step surface 143 of the stepped side wall 14 of the base 1 'to position the optical film set 3 at the first support buffer strip & Between the first step surfaces 143 of the stepped side walls 14 of the base 1, as shown in Figure 6A. Further, corresponding to the positioning pin 33 provided on the optical film group 3, the first control buffer bar a can be placed on the money? Reduce the shortage, Lai Rongxia sales%. In the present embodiment, the 'the first-floor buffer strip a is divided into a plurality of segments, and a notch (not numbered) is formed between the adjacent two segments to accommodate the positioning pin 33 therein. In another aspect, in the present embodiment, the positioning pin 33 is disposed only on the side of the two-optical film side 3a of the optical film group 3, so that the other side of the optical film side 3a is also With the first buffer strip a, the first support buffer strip & on the other first optical film side 3a can be a complete single structure without being divided into several segments in response to the positioning pin 33. Further, at least the second supporting buffer strip b is disposed on the top surface of the engaging side wall, and the first supporting buffer strip a on the optical film group 3 and the first supporting strip b on the engaging side wall 13 are both The dimension (height) in the vertical direction is such that the upper surface of the first and second support strips a, b is formed - the support contact surface will be used to carry a flat element, such as a liquid crystal panel (not shown) ). However, the height of the upper surface of the first-support buffer strip a and the second branch strip b should be lower than the height of the second-order surface 141 of the step 雠 14 to ensure the optical film group 3 and the first branch. Formed above the buffer strips a, b - an assembly space for the 12 201005387 liquid crystal panel can be placed, and the liquid crystal panel can be positioned by the surface i42 of the stepped side wall 14. The first and second support buffer strips a, b are made of a flexible or soft material or an elastically deformable material for the liquid crystal panel on the first and second support buffer strips a and b Provide buffer, shock and protection functions. Examples of materials suitable for making the first and second sub-buffer strips a, b include rubber wins. These sub-buffer strips a, b can be attached to the top surface of the optical film stack 3 and the engaging side walls 13 by any known technique, for example, a layer can be added to the support buffer strips a, b. The adhesive is adhered to the top surface of the optical film set 3 and the engaging side walls. In addition, a surface of the stepped sidewall 14 is provided with a limiting buffer strip c for correspondingly contacting and abutting the liquid crystal panel as a liquid crystal panel closing protection buffer. The limit buffer strip c is also made of a flexible or soft material or an elastically deformable material, such as rubber, and is fixed to the surface 142 of the stepped side wall 14 by a suitable means, for example, by providing a backing glue to be bonded thereto. On the surface 142. Referring again to FIG. 7 , a partial sectional view of a backlight module and a flat member (such as a liquid crystal panel) according to an embodiment of the present invention, wherein the flat member or the liquid crystal panel is indicated by a dotted line and labeled 5 marked. As shown in the combination of the backlight module and the flat panel element (liquid crystal panel) in the seventh week, the liquid crystal panel 5 is placed in the optical film panel 3 and the first and second support buffer strips a, b during assembly. The assembly space defined above is supported by the first and second support buffer strips a, b above the optical film group 3. Then, a display module outer frame 6 is disposed outside the liquid crystal panel 5 to form a complete liquid crystal display module of 13 201005387. Here, the 'liquid crystal panel 5 is assembled in the assembly space _ above the optical film group 3, and is supported by the first branch strip a and the second branch strip b together. The two supporting buffer strips b provide a buffering and protecting function to prevent the liquid crystal panel 5 from being broken due to the pressing force of the assembly. In addition, the side of the liquid crystal panel 5 abuts against the limiting buffer strip c, so the limiting buffer strip c can prevent the side of the liquid crystal panel 5 from directly contacting the surface of the stepped sidewall 14 to avoid checking the crystal panel and other Hard f surface, which is damaged by collision or vibration when the metal material is in direct contact. Referring again to a partial cross-sectional view of a backlight module and a liquid crystal panel according to another embodiment of the present invention shown in FIG. 8, compared with the pre-embodiment of the present invention shown in FIG. 7, the other of the present invention The support buffer strips of the embodiment are not disposed on the first optical film side 3a of the optical film group 3, but are directly disposed on the first step surface 143 of the step side wall 14, and the first branch buffer The height of the strips & is preferably greater than the height of the optical film set 3 such that the upper surface of the first support buffer strip a is higher than the optical film set 3. In this case, the position of the first volley baffle a is between the surface 142 of the stepped side wall 14 and the first optical film side 3a of the optical film set 3. Thereby, the pressing force of the liquid crystal panel 5 and the assembly can be prevented from being applied to the optical group 3, and the crucible is applied to the first step surface 143 of the stepped side wall 14 of the more rigid. It is particularly worthwhile to mention that, in general, the assembly process of the liquid crystal display ^ is completed by assembling the backlight module in the backlight module factory and transporting it to another place for assembly with the liquid crystal panel. Therefore, an outer frame must be added outside the backlight module to facilitate the mounting and shipping of the backlight module. However, in the embodiment A of the present invention, except that 201005387 can be implemented by using the above-mentioned assembly steps, the assembly steps can also be performed at the same place, that is, the backlight module, the liquid crystal panel and the display bezel frame are assembled into one finished product at the same time. 'Not only saves the manufacturing and assembly costs of a frame outside the backlight module, but also improves the overall assembly efficiency. Therefore, compared with the conventional backlight module, it is necessary to assemble a backlight module outer frame outside a base and an optical film group to assemble with a liquid crystal panel. The embodiment of the present invention shown in FIG. 4 is formed by the second-order stepped sidewalls disposed on opposite side edges of the base, and the first step surface of the two stepped sidewalls supports an optical film set and forms an assembly space. Carrying - LCD panel. Therefore, the backlight module does not need to additionally set a backlight module outer frame, and is directly assembled with the liquid crystal panel to effectively simplify the structure of the backlight module. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the present invention has been disclosed in the above preferred embodiments. However, it is not intended to limit the invention, and any one of ordinary skill in the art can make a few changes without departing from the spirit and scope of the invention. And the scope of the present invention is defined by the scope of the appended claims. In addition, the present invention is not intended to limit the scope of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. [Simple Description of the Drawing] Fig. 1 is an exploded perspective view of a conventional backlight module. 2A is a partial sectional view of a conventional backlight module. Figure 2B is a partial assembled cross-sectional view of a conventional backlight module. 15 201005387 Figure 3 is a partial cross-sectional view of a conventional backlight module and a liquid crystal panel. Fig. 4 is an exploded perspective view showing a backlight module according to an embodiment of the present invention. Fig. 5 is a partial perspective view of a stepped side wall according to an embodiment of the present invention. Fig. 6A is a partial sectional view showing the step side wall of an embodiment of the present invention. Fig. 6B is a partial cross-sectional view showing the engaging side wall of an embodiment of the present invention. Fig. 7 is a partial sectional view showing a combination of a backlight module and a liquid crystal panel according to an embodiment of the present invention. Figure 8 is a cross-sectional view showing a combination of a backlight module and a liquid crystal panel according to another embodiment of the present invention. [Main component symbol description] 1 Base 11 Back plate la First side lb Second side lc Housing space 12 Side wall 121 Support edge 13 Engagement side wall 131 Engagement groove 14 Step side wall 141 Second stage surface 142 Surface 143 First-order surface 144 First positioning hole 2 Light source group 3 Optical film group 31 Diffusion plate 311 Second positioning hole 32 Optical film 321 Third positioning hole 201005387 33 Positioning pin 3a First side 3b Second side 4 Backlight mode Group frame 5 LCD panel 6 Display module frame 801 Base 801a First side 801b Second side 801c accommodating space 802 Light source group 803 Optical film group 803a First side 803b Second side 804 Backlight module Outer frame 805 LCD panel 806 Display module frame 811 Back plate 812 Side wall 813 Engagement side wall 821 Support edge 831 Engagement groove 895 Buffer bar a First support buffer b Second support buffer c C Limit buffer
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