九、發明說明： 【發明所屬之技術領域】 本發明係有關於背光模組，尤其係指一種用於背光模組之固定結 構。 【先前技術】 4參閱圖卜習知背光模組固定擴散片u之方式，係於擴散片 11上設置一圓孔12’於背光模組之殼體（圖未示）上設置一柱狀體（圖 未不）’透過圓孔12套於柱狀體上，以將擴散片11固定於殼體上； 然而擴散片11上的圓孔12係透過裁切擴散片u而形成，而裁切下 來的圓形廢4若直接脫落容㈣傷擴散片u，造成擴散片丨丨光學性 質不良ϋ若廢屑未直接脫落，又須以人卫方式使綱脫離擴散 片11，耗費人力與工時，降低生產效率。 凊參閱圖2 ’習知另—種背光模組gj定擴散片u，之方式，係於 擴散片11’的兩側邊上設置一呈半圓形的缺口 13，利用缺口 13將 擴政片11固义於背光模組之殼體上，但此種方式擴散片11，容易 滑動而不易定位，故會增加組裝背光模組之困難度。 【發明内容】 本發明之—目的’係提供無廢相擾，具有良好@]跋果，且容 易加工及組裝之背光模組。 為達上述目的’本發明之背光模組包括-殼體'-光源及-光學 材料片’殼體具有-定位凸起部，光學材料片之一側邊上沿一水平 方向延伸設置—叫，凸耳上設置—具有—開Π之定減，當光學 材料片織於殼體時，定位凸起料套人定位孔内，此時定位凸起 部被開口關崎持於定位孔内，藉峨_繼生滑動及 位移。 【實施方式】 有關本發明為達到上述目的’所剌之技術手段及其餘 功效，兹舉較佳實施例，並配合圖式加以說明如下： 請參閱圖3及圖4，本發明背光模組2〇包含一殼體2卜 至少-光源22及-光學材料片23。其中光源22係設置於 殼體21内’用以提供-光束’光源22例如為冷陰極勞光 燈管或發光二極體，本實施例中，光源22包含複數個等距 且相互平行排設於殼艘21内之燈管，但並不以此為限；光 學材料片23設置於光源22之上方’例如為擴散片或稜鏡片等。 光源22提供之光束經光學材料片23進行擴散及準直等處理後，可 提供一均勻的面光源至一顯示面板（圖未示 殼體21接近光學材料片23之-表面211之相對兩側邊沿水 平方向（即X軸）分別延伸一凸出部212,凸出部212上朝光 學材料片22方向（即Υ軸）垂直設置有一定位凸起部213,定位 凸起部213可為一柱狀體；光學材料片23之相對兩側邊231沿水 平方向分別延伸設置一凸耳232’凸耳232上設置—具有一開口 2331 1343502 • 之定位孔233，開口 2331係位於凸耳232遠離殼體21之一端上， 定位凸起部213係設置於定位孔233内，且定位凸起部213之最小 外徑係大於開口 2331之最大寬度W。其中，定位孔233可為圓形或 橢圓形，本實施例中，定位孔233為圓形（如圖4所示），定位凸起 部213為一圓柱狀體，且開口 2331的最大寬度w係小於定位凸起部 213之圓柱狀體的直徑])。 • 請參閱圖5，當光學材料片23由殼體21沿垂直方向（即丫軸） 組裝於殼體21上時，定位凸起部213係套入定位孔233内，此時定 位凸起部213被開口 2331限制而維持於定位孔233内，藉以避免光 學材料片23於水平面（即Xz平面）上滑動及位移。 由於本發明之定位孔233具有開口 2331，故可不需使用習知的裁 切程序來製作’因此，不會有廢層產生，且透過開口 2331與定位凸 起部213特殊的尺寸設計，可使光學材料片23具有良好定位以及固 ^ 定效果。 另外π參咖6 ’本發明另—本實施例之背光模组，本實施例 與圖3實施例之不同在於：光學材料片23，具有四個定位孔·、 233Β 233C 233D ’其中，粒孔测、233Β為圓形並設置於光學 材料片23之對角，定位孔233c、233D為摘圓形並設置於光學 材料片23之另對角。其中定位孔就其擴圓形之長袖平行於 水平面之左右水平方向（即X轴）時，使定位凸起部213可沿長軸 1343502 方向移動而調整光學材料片23’左右水平方向的位移。定位孔2331) 其橢圓形之長轴平行於水平面之上下水平方向（即Z軸）時，使定位 凸起部213可沿長軸方向移動而調整光學材料片上下水平方向的位 移。當組裝光學材料片23,至殼體（圖未示）上時，橢圓形之定位孔 233C、233D之設置可提供光學材料片23,位置的微調，以吸收背光 模組各元件於製造及組裝時之公差，讓光學材料片33，可糊組裝 至殼體上，增加組裝時的彈性及便利性。 以上所述，僅㈣方便訓本發明之較佳實施例，本發明之範圍 不限於該等較佳實施例，凡依本發明所做的任何變更，於不脫離本 發明之精神下，皆屬本發明申請專利範圍。 【圖式簡單說明】 圖1係習知一種擴散片之固定結構。 圖2係習知另一種擴散片之固定結構。 圖3係本發明背光模組之示意圖。 圖4係本發明背光模組之光學材料片之局部放大圖。 圖5係本發明背光模組固定結構之局部組合圖。 圖6係本發明背光模組另一實施例之示意圓。 【年要元件符號說明1 背光模組 ---- 20 殼體 *-------— ------ 21 1343502IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a fixed structure for a backlight module. [Prior Art] 4 Referring to the conventional method of fixing the diffusion sheet u of the backlight module, a circular hole 12' is disposed on the diffusion sheet 11 to provide a columnar body on the casing (not shown) of the backlight module (not shown) No) 'the sleeve 12 is sleeved on the column to fix the diffusion sheet 11 to the housing; however, the circular hole 12 in the diffusion sheet 11 is formed by cutting the diffusion sheet u, and the cut circle is formed. If the waste 4 is directly detached (4) the diffusing film u is caused, the optical properties of the diffuser are poor. If the waste does not fall off directly, it must be removed from the diffuser 11 by the human guard. It takes labor and man-hours to reduce production. effectiveness. Referring to FIG. 2, a conventional backlight module gj defines a diffusion sheet u in such a manner that a semi-circular notch 13 is provided on both sides of the diffusion sheet 11', and the expansion sheet is used by the notch 13. 11 is fixed on the casing of the backlight module, but the diffusion sheet 11 in this manner is easy to slide and is not easy to position, so the difficulty in assembling the backlight module is increased. SUMMARY OF THE INVENTION The object of the present invention is to provide a backlight module which has no waste crosstalk, has a good @] effect, and is easy to process and assemble. In order to achieve the above object, the backlight module of the present invention includes a casing-light source and an optical material sheet housing having a positioning protrusion, and a side of one of the optical material sheets extends along a horizontal direction. The protrusion on the lug has a certain reduction of the opening. When the optical material sheet is woven in the housing, the positioning protrusion is positioned in the positioning hole, and the positioning protrusion is opened in the positioning hole by the opening.峨 _ secondary sliding and displacement. [Embodiment] The technical means and other functions of the present invention in order to achieve the above object are described as follows. Referring to FIG. 3 and FIG. 4, the backlight module 2 of the present invention is described. The crucible comprises a housing 2 at least a light source 22 and an optical material sheet 23. The light source 22 is disposed in the housing 21 to provide a light beam. The light source 22 is, for example, a cold cathode fluorescent tube or a light emitting diode. In this embodiment, the light source 22 includes a plurality of equidistant and parallel rows. The lamp tube in the shell 21 is not limited thereto; the optical material sheet 23 is disposed above the light source 22, such as a diffusion sheet or a cymbal sheet. After the light beam provided by the light source 22 is diffused and collimated by the optical material sheet 23, a uniform surface light source can be provided to a display panel (the housing 21 is not shown to be close to the opposite sides of the surface 211 of the optical material sheet 23). A protrusion portion 212 is defined in the horizontal direction of the edge (ie, the X-axis), and a positioning protrusion portion 213 is disposed on the protrusion portion 212 in the direction of the optical material sheet 22 (ie, the Υ axis). The positioning protrusion portion 213 can be a The cylindrical body; the opposite side edges 231 of the optical material sheet 23 respectively extend in the horizontal direction, and a lug 232' is provided on the lug 232. The positioning hole 233 is provided with an opening 2331 1343502. The opening 2331 is located away from the lug 232. On one end of the housing 21, the positioning protrusion 213 is disposed in the positioning hole 233, and the minimum outer diameter of the positioning protrusion 213 is greater than the maximum width W of the opening 2331. The positioning hole 233 may be circular or elliptical. In this embodiment, the positioning hole 233 is circular (as shown in FIG. 4), the positioning protrusion 213 is a cylindrical body, and the maximum width w of the opening 2331 is smaller than the cylindrical body of the positioning protrusion 213. diameter of]). • Referring to FIG. 5, when the optical material sheet 23 is assembled on the housing 21 by the housing 21 in the vertical direction (ie, the 丫 axis), the positioning protrusion 213 is sleeved into the positioning hole 233, and the positioning protrusion is positioned at this time. The 213 is restrained by the opening 2331 and maintained in the positioning hole 233 to prevent the optical material sheet 23 from sliding and dislodging in the horizontal plane (i.e., the Xz plane). Since the positioning hole 233 of the present invention has the opening 2331, it can be fabricated without using a conventional cutting program. Therefore, no waste layer is generated, and the special size design of the opening 2331 and the positioning protrusion 213 can be adopted. The optical material sheet 23 has a good positioning and fixing effect. In addition, the backlight module of the present embodiment is different from the embodiment of FIG. 3 in that the optical material sheet 23 has four positioning holes · 233 Β 233C 233D ' 233 Β is circular and disposed at a diagonal of the optical material sheet 23, and the positioning holes 233c and 233D are rounded and disposed at opposite corners of the optical material sheet 23. When the positioning hole is parallel to the horizontal direction of the horizontal plane (i.e., the X-axis), the positioning projection 213 is movable in the direction of the long axis 1343502 to adjust the displacement of the optical material sheet 23' in the horizontal direction. The positioning hole 2331), when the long axis of the elliptical shape is parallel to the upper horizontal direction (i.e., the Z axis) above the horizontal plane, allows the positioning convex portion 213 to move in the long axis direction to adjust the horizontal displacement of the optical material sheet in the horizontal direction. When the optical material sheet 23 is assembled onto the casing (not shown), the elliptical positioning holes 233C, 233D are provided to provide the optical material sheet 23, and the position is finely adjusted to absorb the components of the backlight module for manufacturing and assembly. The tolerance of the time allows the optical material sheet 33 to be paste-assembled onto the casing, thereby increasing the flexibility and convenience in assembly. The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the preferred embodiments, and any changes made in accordance with the present invention are not departing from the spirit of the present invention. The scope of the patent application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a conventional fixed structure of a diffusion sheet. Figure 2 is a conventional fixed structure of a diffusion sheet. 3 is a schematic view of a backlight module of the present invention. 4 is a partial enlarged view of an optical material sheet of the backlight module of the present invention. FIG. 5 is a partial assembled view of a fixing structure of a backlight module of the present invention. 6 is a schematic circle of another embodiment of the backlight module of the present invention. [Year of the component symbol description 1 backlight module ---- 20 housing *-------------- 21 1343502
表面 211 凸出部 212 定位凸起部 213 光源 22 光學材料片 23、23， 側邊 231 凸耳 232 定位孔 233、233A、233B、233C、233D 開口 2331Surface 211 Projection 212 Positioning boss 213 Light source 22 Sheet of optical material 23, 23, side 231 Lug 232 Positioning hole 233, 233A, 233B, 233C, 233D Opening 2331