200825562 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及其製造方法。 【先前技術】 ，隨著數位科技的發展，液晶顯示產品已廣泛地應用在 曰常生活的各個層面中，對液晶顯示螢幕的晝質要求也逐 步提高。但是液晶本身不會發光，需要有光源不斷提供光 線射入液晶顯示螢幕，方可實現晝面顯示，在液晶顯示產 品中’通常選擇背光模組來提供光線。 請參閱圖1，係一種先前技術所揭露之背光模組之截 面示意圖。該背光模組i包括一稜鏡片10、一擴散片n、 —光源12、一光源罩13、一導光板14、一膠框15、一反 射片16及一金屬框17。其中，該光源罩13收容該光源 該稜鏡片1G、該擴散片u、該導光板14及該反射片16 依次重S設置，該膠框15與該金屬框17配合收容該棱鏡 片10、該擴散片u、該光源罩13、該導光板14及該反射 片16 〇 該導光板14係—矩形平板，其具有―人光面i4i… j面142及底面143。該出光面142與該底面143相 署：且分別與該入光面141相鄰。該底面143間隔設 置復數半球形網點144。 漁光极組1用於液晶顯示裝置以提供背光時，該光 "、 的光線自該入光面141導入該導光板14，該入 200825562 射光線藉由該導光板14處理後由該出光面142射出，並經 由該擴散片11及該棱鏡片10提供給液晶顯示面板。 然而，上述背光模組1中，由於該導光板14之底面 143設置複數網點144,故該導光板14與該反射片16之間 存在間隙，如圖2所示。在被該反射片16反射的光線中， 現假設恰好經過該導光板14底面143邊緣的反射光線的反 射角為α，則反射角小於α的反射光線均會射入該導光板 14 ’而反射角大於α的光線均會射入該膠框15並被吸收， 造成部份光線的損失，從而使該光源12光利用率降低； 且，組裝該背光模組1時，該導光板14需藉由該膠框Μ 固持，這將增加組裝工序及組裝時間，從而提高組裝成本。 【發明内容】 有鑑於此，提供一種能有效提高光源光利用率及降低 組裝成本的背光模組實為必需。 同時’有必要提供一種該背光模組的製造方法。 一種月光杈組，其包括一光源及一金屬框，該金屬框 已括底板及‘光層，该底板表面具有複數網點，該導 光層覆蓋該網點，該導光層與該金屬框係一體的，該光源 設於該底板表面且靠近該導光層侧面設置。 一種背光模組的製造方法，其包括以下步驟··提供一 金屬框，該金屬框包括一底板；將該底板分成二相鄰區域， 並在其中一區域的表面製造複數間隔分佈的網點；在該網 點及該區域的表面形成一導光層，該導光層與該金屬框係 200825562 :體的；在該底板㈣—區域設置—光源，該光源靠近該 v光層側面設置，完成該背光模組的製造過程。 相較於先前技術，本發明之背光模組中，該導光層盈 該金屬框係-體的，該導光層與該底板之間不存在心？ 故被該底板反射的光線均射進該導光層，避免光線射出間 隙而造成光線損失，從而提高該㈣的光利用帛，增 光，輝度，且’該月光模組利用該底板作為反射元件，省 去單獨的反射片元件，從而降低材料成本。 相較於先前技術，本發明之背光模組之製造方法中， 本發明之背光模組由於該導光層形成於該網點及該區域的 表面’故不需要用膠框來固持該導光I，使得製造工序簡 單’同時也減少製造工時，降低製造成本；且，該導光層 與該金屬框係-體形成的’該導光層與該區域之間不存： 間隙，被該區域反射的光線均射進該導光層，避免光線射 出間隙而造成光線損失’從而提高該光源的光利用率，增 強背光的輝度；另’該背光模組利用該底板之—區域作為 反射凡件，省去單獨的反射片元件，從而降低材料成本。 【實施方式】 請參考圖3,係本發明之背光模組第一實施方式的截 面示意圖。該背光模組2包括一稜鏡片2〇、一擴散片21、 一光源22、一光源罩23及—金屬框25。 、曾該金屬框25具有一矩形底板251、四個侧壁252及一 導光層254。其中’該四個侧壁252均垂直設置於該底板 200825562 251之四邊緣，且首尾相接。 該底板251具有二相鄰的第一區域258及第二區域 259。其中，該底板251係一具有光反射特性的金屬板，故 該第一區域258亦具有反射特性。該第一區域258表面具 有間隔分佈的複數網點253，該網點253係半球形突起。 該導光層254設於該第一區域258並覆蓋該複數網點 253，該導光層254與該金屬框25係一體的。 該導光層254具有一入光面255及一出光面256，該 入光面255與該出光面256相鄰設置，該入光面255垂直 於該底板251，該出光面256遠離該底板251且與該底板 251平行。 該光源罩23收容該光源22，並設置於該第二區域 259，使該光源22面對該導光層254的入光面255 —側。 該擴散片21及該稜鏡片20依次層疊設置於該導光層254 的出光面256 —側，並收容於該金屬框25内。 當該背光模組2用於液晶顯示裝置以提供背光時，該 光源22產生的光線自該入光面255導入該導光層254，該 入射光線藉由該導光層254處理後由該出光面256射出， 並經由該擴散片21及該稜鏡片20提供給液晶顯示面板以 實現圖像顯示。 請參閱圖4，係上述背光模組2局部放大的光路示意 圖。由於該導光層254與該金屬框25係一體的，故該導光 層254與該金屬框25之間不存在間隙，被該第一區域258 反射的光線均進入該導光層254，被該金屬框25之側壁252 200825562 反射的光線亦均進入該導光層254。 當然，本實施方式中的網點253亦可為其他形狀的突 起’如矩形突起或其他形狀的突起。 相較於先前技術，本發明之背光模組2中，由於該導 光層254與該金屬框25係一體的，故使該導光層254與該 金屬框25之間不存在間隙’被該第—區域⑽反射的光線 均射進該導光層254,被該金屬框25之側壁反射的光 線亦均進人該導光| 254,避免光線射出間隙而造成光線 才貝失，從而提高該光源22的光利用率，增強背光的輝度； 且’該背光模組2利用該金屬框25之第一區域258作為反 射儿件’省去單獨的反射片元件，從而降低材料成本。 該背β光模組2的製造方法，其包括以下步驟： a. 提供一金屬框25，該金屬框25包括一底板251及 四:側壁252,該四個側壁252垂直設置在該底板251的 四邊緣’並首尾相接。 b. 將該底板251分成二相鄰的第_區域—及第二區 t Μ二並藉由機械加工的方法在該第-區域258表面製 仏複數間隔分佈的網點25 3。 兮笛^L該底板251係一具有光反射特性的金屬板，故 ==:说亦具有反射特性。該複數網點253加工為 :、=二起’同時’亦可加工為矩形或者其他形狀的突起。 亦可藉由化學刻餘的方法製造於該第-區 1由射出成形技術，於該第一區域258及該網點 200825562 253的表面注入透明塑膠材料，形成一導光層254，該導光 -層254與該金屬框25係一體形成的。 ' 其中，所形成的導光層254具有一入光面255及一出 光面256該入光面255與該出光面256相鄰，該入光面 255垂直於該底板251，該出光面256遠離該底板251且與 該底板251平行。該透明塑膠材料採用聚甲基丙烯酸曱 酯，除此之外亦可採用高分子碳酸脂材料。 d•在該第二區域259上設置一光源罩23及一光源 22，該光源22收容於該光源罩23内。 卫e·於該V光層254之出光面256 一側依次層疊設置一 擴政片21及一稜鏡片2〇,並收容於該金屬框内，從而 完成該背光模組2的製造過程。 相較於先前技術，本發明之背光模組2之製造方法 :’該導光層254形成於該網點253及該第—區域—的 表面，故不需要用膠框來固持該導光層254,使得植裝工 $簡單’同時也減少組裝工時’降低了組裝成本；且，該 =光層254與該金屬框25係一體形成的，該導光層254 :::屬框25之間不存在間隙’被該第-區域258反射的 先線均射進該導光層254,被該金屬框25之側壁 =線：均進入該導…54,避免光線射出間隙而造成 „，從而提高該光源22的光利用率，增強背光的輝 該背光模組2利用該金屬框25之第一區域258 :為反射元件’省去單獨的反射片元件，從而降低材料成 11 200825562 ^閱圖5’係本發明之背光模組第二實施方式的截 ’ Γ:二：背光模組3之結構與第一實施方式大致相 ‘同八區別在於.該底板351及該網點353的表 層具高反射率的金屬膜357，太奢浐表面叹有一 357 丌了為一銀膜。猎由該金屬膜357 “該底板351第—區域358與設置於該第一區域说 的網點353的反射率，、或j、止細c ό丄士 古減線 ^的損失，更好地提 冋該先源32的先利用率，從而增強該背光模組3的輝度。 本實施方式之背光模組3的製造方法與第一實施方式 大致相同’其區別在於:在步驟b中，採用化學沉積方法， =板351表面及該網點353的表面形成一層 的金屬膜357,該金屬膜357可以係一㈣，亦可以係一 銀膜。上述金屬膜357亦可採用濺鍍的方法形成。 專利Ϊί所本發明確已符合發明之要件，麦依法提出 明 ，以上所述者僅為本發明之較佳實施方式， 發明之範圍並不以上述實施方式為限，舉凡熟習本案技 ^人士援依本發明之精神所作之等效修倚或變化，皆應 涵盍於以下申請專利範圍内。 【圖式簡單說明】 圖1係先前技術所揭露之背光模組之截面示意圖。 圖2係圖1所示背光模組之局部放大的光路示意圖。 圖3係本發明之背光模組第一實施方式的截面示意 12 200825562 圖4係圖3所示背光模組之局部放大的光路示意圖。 γ 圖5係本發明之背光模組第二實施方式的截面示意 .圖0 【附圖標記說明】 背光模組 2、3 網點 253、353 稜鏡片 20 導光層 254 擴散片 21 入光面 255 光源 22、32 出光面 256 光源罩 23 第一區域 258、358 金屬框 25 第二區域 259 底板 251 、 351 金屬膜 357 側壁 252 13200825562 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a backlight module and a method of fabricating the same. [Prior Art] With the development of digital technology, liquid crystal display products have been widely used in various aspects of everyday life, and the requirements for the quality of liquid crystal display screens have gradually increased. However, the liquid crystal itself does not emit light, and a light source is required to continuously provide light to the liquid crystal display screen to realize the kneading surface display. In the liquid crystal display product, a backlight module is usually selected to provide light. Please refer to FIG. 1, which is a cross-sectional view of a backlight module disclosed in the prior art. The backlight module i includes a cymbal 10, a diffusion sheet n, a light source 12, a light source cover 13, a light guide plate 14, a plastic frame 15, a reflective sheet 16, and a metal frame 17. The light source cover 13 accommodates the light source, the cymbal sheet 1G, the diffusion sheet u, the light guide plate 14 and the reflection sheet 16 are sequentially disposed in a weight S, and the plastic frame 15 and the metal frame 17 cooperate to receive the prism sheet 10, The diffuser u, the light source cover 13, the light guide plate 14, and the reflective sheet 16 are a rectangular flat plate having a human light surface i4i...j surface 142 and a bottom surface 143. The light exit surface 142 is associated with the bottom surface 143 and is adjacent to the light incident surface 141, respectively. The bottom surface 143 is spaced apart from the plurality of hemispherical dots 144. When the fishing light pole set 1 is used in a liquid crystal display device to provide a backlight, the light of the light is introduced into the light guide plate 14 from the light incident surface 141, and the light entering the 200825562 is processed by the light guide plate 14 to be emitted by the light guide plate 14 The surface 142 is emitted and supplied to the liquid crystal display panel via the diffusion sheet 11 and the prism sheet 10. However, in the above backlight module 1, since the bottom surface 143 of the light guide plate 14 is provided with a plurality of dots 144, there is a gap between the light guide plate 14 and the reflection sheet 16, as shown in FIG. In the light reflected by the reflection sheet 16, it is assumed that the reflection angle of the reflected light passing through the edge of the bottom surface 143 of the light guide plate 14 is α, and the reflected light having a reflection angle smaller than α is incident on the light guide plate 14' and reflected. Light having an angle greater than α will be incident on the frame 15 and absorbed, causing loss of part of the light, thereby reducing the light utilization rate of the light source 12; and when the backlight module 1 is assembled, the light guide plate 14 is required to be borrowed. It is held by the plastic frame ,, which will increase the assembly process and assembly time, thereby increasing the assembly cost. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a backlight module that can effectively improve light source utilization and reduce assembly cost. At the same time, it is necessary to provide a method of manufacturing the backlight module. A moonlight group includes a light source and a metal frame, the metal frame includes a bottom plate and a 'light layer, the bottom surface has a plurality of dots, the light guiding layer covers the dot, and the light guiding layer is integrated with the metal frame The light source is disposed on the surface of the bottom plate and disposed adjacent to a side of the light guiding layer. A manufacturing method of a backlight module, comprising the steps of: providing a metal frame, the metal frame comprising a bottom plate; dividing the bottom plate into two adjacent regions, and fabricating a plurality of spaced-apart dots on a surface of one of the regions; The mesh point and the surface of the area form a light guiding layer, the light guiding layer and the metal frame are 200825562: a light source is arranged in the bottom plate (four) region, and the light source is disposed near the side of the v light layer to complete the backlight The manufacturing process of the module. Compared with the prior art, in the backlight module of the present invention, the light guiding layer is in the metal frame body, and there is no heart between the light guiding layer and the bottom plate. Therefore, the light reflected by the bottom plate is incident on the light guiding layer to prevent light from being emitted from the gap and causing light loss, thereby improving the light utilization, brightness, and brightness of the (4) light, and the moonlight module uses the bottom plate as a reflective element. The individual reflector elements are eliminated, thereby reducing material costs. Compared with the prior art, in the manufacturing method of the backlight module of the present invention, the backlight module of the present invention is formed on the mesh point and the surface of the region by the light guiding layer, so that the light guide frame is not required to hold the light guiding I. , the manufacturing process is simple 'while also reducing manufacturing man-hours, reducing manufacturing costs; and the light guiding layer and the metal frame body - formed between the light guiding layer and the region: gap, by the region The reflected light is incident on the light guiding layer to prevent the light from being emitted into the gap and causing light loss, thereby improving the light utilization efficiency of the light source and enhancing the brightness of the backlight; and the backlight module uses the area of the bottom plate as a reflecting object. , eliminating the need for separate reflector components, thereby reducing material costs. [Embodiment] Please refer to Fig. 3, which is a cross-sectional view showing a first embodiment of a backlight module of the present invention. The backlight module 2 includes a cymbal 2 〇, a diffusion sheet 21, a light source 22, a light source cover 23, and a metal frame 25. The metal frame 25 has a rectangular bottom plate 251, four side walls 252, and a light guiding layer 254. The four side walls 252 are vertically disposed on the four edges of the bottom plate 200825562 251, and are connected end to end. The bottom plate 251 has two adjacent first regions 258 and second regions 259. The bottom plate 251 is a metal plate having light reflection characteristics, so the first region 258 also has a reflection property. The first region 258 has a plurality of dots 253 spaced apart on its surface, the dots 253 being hemispherical protrusions. The light guiding layer 254 is disposed on the first region 258 and covers the plurality of dots 253. The light guiding layer 254 is integral with the metal frame 25. The light guiding layer 254 has a light incident surface 255 and a light emitting surface 256. The light incident surface 255 is disposed adjacent to the light emitting surface 256. The light incident surface 255 is perpendicular to the bottom plate 251, and the light emitting surface 256 is away from the bottom plate 251. And parallel to the bottom plate 251. The light source cover 23 houses the light source 22 and is disposed in the second region 259 such that the light source 22 faces the light incident surface 255 of the light guiding layer 254. The diffusion sheet 21 and the cymbal sheet 20 are sequentially stacked on the light-emitting surface 256 side of the light guiding layer 254 and housed in the metal frame 25. When the backlight module 2 is used in a liquid crystal display device to provide a backlight, the light generated by the light source 22 is introduced into the light guiding layer 254 from the light incident surface 255, and the incident light is processed by the light guiding layer 254 to be emitted by the light guiding layer 254. The surface 256 is ejected and supplied to the liquid crystal display panel via the diffusion sheet 21 and the cymbal sheet 20 to realize image display. Please refer to FIG. 4, which is a partially enlarged optical path diagram of the backlight module 2. Since the light guiding layer 254 is integrated with the metal frame 25, there is no gap between the light guiding layer 254 and the metal frame 25, and the light reflected by the first region 258 enters the light guiding layer 254. The light reflected by the side wall 252 200825562 of the metal frame 25 also enters the light guiding layer 254. Of course, the dots 253 in the present embodiment may also be protrusions of other shapes such as rectangular protrusions or protrusions of other shapes. Compared with the prior art, in the backlight module 2 of the present invention, since the light guiding layer 254 is integrated with the metal frame 25, there is no gap between the light guiding layer 254 and the metal frame 25. The light reflected by the first region (10) is incident on the light guiding layer 254, and the light reflected by the sidewall of the metal frame 25 is also introduced into the light guide | 254 to prevent the light from being emitted from the gap and causing the light to be lost. The light utilization of the light source 22 enhances the brightness of the backlight; and the backlight module 2 utilizes the first region 258 of the metal frame 25 as a reflective member to eliminate individual reflective sheet elements, thereby reducing material costs. The manufacturing method of the back beta optical module 2 includes the following steps: a. providing a metal frame 25, the metal frame 25 including a bottom plate 251 and four: sidewalls 252, the four sidewalls 252 are vertically disposed on the bottom plate 251 The four edges are connected end to end. b. The bottom plate 251 is divided into two adjacent _ regions and a second region t Μ and a plurality of spaced apart dots 25 3 are formed on the surface of the first region 258 by mechanical processing. The bottom plate 251 is a metal plate having light reflection characteristics, so that ==: it also has a reflection characteristic. The plurality of dots 253 are processed into: , = two, and simultaneously processed into rectangles or protrusions of other shapes. The first region 258 and the surface of the dot 200825562 253 may be injected with a transparent plastic material by a chemical engraving method to form a light guiding layer 254. Layer 254 is integrally formed with the metal frame 25. The light guide layer 254 has a light incident surface 255 and a light exit surface 256. The light incident surface 255 is adjacent to the light exit surface 256. The light incident surface 255 is perpendicular to the bottom plate 251, and the light exit surface 256 is away from the bottom surface. The bottom plate 251 is parallel to the bottom plate 251. The transparent plastic material is made of polymethyl methacrylate, and a polymer carbonate material can also be used. d. A light source cover 23 and a light source 22 are disposed on the second area 259, and the light source 22 is received in the light source cover 23. On the light-emitting surface 256 side of the V-light layer 254, the welcoming e-layer 21 and a cymbal sheet 2 are sequentially stacked and housed in the metal frame to complete the manufacturing process of the backlight module 2. Compared with the prior art, the manufacturing method of the backlight module 2 of the present invention: 'the light guiding layer 254 is formed on the surface of the dot 253 and the first region—so that the light guiding layer 254 is not required to be held by the plastic frame. , so that the planter's simple 'while also reducing the assembly man-hours' reduces the assembly cost; and the = light layer 254 is integrally formed with the metal frame 25, the light guide layer 254 ::: between the frame 25 There is no gap 'the first line reflected by the first region 258 is incident on the light guiding layer 254, and the side wall = line of the metal frame 25 enters the guiding portion 54 to prevent the light from being emitted from the gap, thereby increasing The light utilization rate of the light source 22 enhances the backlight. The backlight module 2 utilizes the first region 258 of the metal frame 25: a separate reflective sheet member is omitted for the reflective element, thereby reducing the material into 11 200825562. The second embodiment of the backlight module of the present invention is the same as the first embodiment. The structure of the backlight module 3 is substantially the same as that of the first embodiment. The surface of the bottom plate 351 and the dot 353 are highly reflective. The rate of the metal film 357, too extravagant surface sighs a 357 丌 for a silver film The hunting of the metal film 357 "the bottom plate 351 first region 358 and the reflectivity of the mesh point 353 provided in the first region, or the loss of the j, the stop c, the gentleman minus the line ^ better The first utilization of the source 32 increases the luminance of the backlight module 3. The manufacturing method of the backlight module 3 of the present embodiment is substantially the same as that of the first embodiment. The difference is that in the step b, a metal film 357 is formed on the surface of the plate 351 and the surface of the dot 353 by a chemical deposition method. The metal film 357 may be one (four) or a silver film. The above metal film 357 can also be formed by sputtering. The invention has indeed met the requirements of the invention, and it is said that the above is only a preferred embodiment of the present invention, and the scope of the invention is not limited to the above embodiment, and those skilled in the art are skilled in the art. Equivalent modifications or variations made in accordance with the spirit of the invention are intended to be within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a backlight module disclosed in the prior art. FIG. 2 is a partially enlarged optical path diagram of the backlight module shown in FIG. 1. FIG. 3 is a schematic cross-sectional view of a first embodiment of a backlight module of the present invention. 12 200825562 FIG. 4 is a partially enlarged optical path diagram of the backlight module shown in FIG. γ FIG. 5 is a schematic cross-sectional view of a second embodiment of the backlight module of the present invention. FIG. 0 [Description of Reference Signs] Backlight Module 2, 3 Dot 253, 353 Bake 20 Light Guide Layer 254 Diffuser 21 Light Entry Surface 255 Light source 22, 32 light exit surface 256 light source cover 23 first region 258, 358 metal frame 25 second region 259 bottom plate 251, 351 metal film 357 side wall 252 13