201100922 ^ 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及液晶顯示技術領域，尤其涉及一種背光模組 〇 [0002] 【先前技術] 由於液晶面板本身不具發光性，液晶顯示裝置中需設置 背光模組來提供液晶顯示裝置照明光源。傳統背光模組 包括光源、導光板、反射板、擴散板及棱鏡板。其中， 該光源為線光源或點光源，其設置於導光板一側或兩相 對側並將光線發射至該導光板。該導光板用於引導光線 傳輸方向，使光線由導光板.的出.光面均.勻...出.射。反射板 δ史置於該導光板的底面一側，以將由導光板底面出射的 光線再次反射入該導光板内。擴散板與棱鏡板則依次設 G [0003] 置於導光板的出光面一侧’以使自導光板出射的光線分 佈更加均勻。為進一步提高液晶顯示器面板輝度及控制 亮度均勻’通常於導光板的與光入光面相對的底面設置 網點來k 1¾點光源發射出的光線的散射性。 惟，習知背光模組的光源均設置於導光板外，導致液晶 顯示裝置較厚，不利於液晶顯示裝置的輕薄化。另欲 於導光板底面設置網點’則必需於模仁開發期内開展複 雜且精細的圖案設計來於模仁表面形成網點，以利用該 模仁生產㈣有賴·_導光板，耗tAf人力及物力 0 [0004] 有鑑於此’提供-種背光模組來簡化背光模組結構及降 低生產成本實為必要。 098120015 表單編號A0101 第3頁/共11頁 0982034048-0 201100922 * ‘ > 【發明内容】 ατα實^*例為例說明—種結構簡單成本低廉的背光 模组。 _ μ包括光源、反射件、擴散板及基板。該擴散 具有相對的入光面及出光面。該基板具有與該入光面 相對的非球面’並自該非球面向其内部開設有容置槽。 該非球面形成有反射膜。該光源收容於該容置槽内。該 mu亥擴散板’並與該光源相對。該光源發出的 反射件反射至該反射膜後由該反射膜反射至該 入光面，並自該出光面射出。 [酬本技術方案提供㈣光模_套制反射件及反射膜， 利用反射原理’將光源發出的光線經反射膜轉換為面光 源後自出光面射出。與先前技術相比，該背光模組直接 將光源設於基板與擴散板之間，縮小了背光模組的體積 ’無需投入人力及物力來於模仁表面進行圖案設計從而 於基板表面設置網點，由此。大大降低成本。 【實施方式】 [0008] 以下結合附圖及實施例對本技術方案提供的背光模組進 行詳細說明。 [0009] 參見圖1 ’本技術方案第一實施例提供的背光模組1〇〇包 括擴散板10、基板20、光源30及反射件40。 [0010] 擴散板10呈平直板狀’其具有相對的入光面丨丨及出光面 12。 [0011] 基板20設於擴散板1〇下方，其具有第一表面24及與第一 098120015 表單編號 A0101 第 4 頁/共 u 頁 0982034048-0 201100922 〇 表面24相對的第二表面25。第一表面24與入光面丨丨相對 基板20自第一表面24向第二表面25開設有凹槽，由此 件到與入光面11相對的非球面21。基板2〇還自非球面21 朝第二表面25開設有容置槽22。基板2〇可為透明材料， 如丙烯酸樹脂、聚碳酸酯或聚乙烯樹脂等本領域常用於 1作導光板的材料，經射出成型而成。非球面2丨形成有 反射膜23。反射膜23材質為銀、鎂、金、鉑、五氧化鈦 、二氧化鈦、氧化鈮或五氧化二鈕等具有較高反射性的 材料，其可採用化學氣相沉積法、電子束蒸鍍法、濺鍍 法等方法形成於非球面21 ^容置槽22用於收容光源30 ’ 其中心軸與基板2 〇的中心軸共線。 [0012] 光源30收容於容置槽22内，用以提供背光楱組1〇〇的照明 光線。光源30可為複數發光二極體或冷陰極螢光管。 [0013] 反射件40固定於擴散板1 〇的入光面11 其與光源30相對 ’用於將光源30發出的光線反射至反射膜21。反射件40 可為本領域常用的反射片。 〇 [0014] • 本實施例的背光模組100藉由將光源30收容於基板20内， 利用位於基板20中心轴線的反射件40將光源30發出的光 線反射至反射膜23，再利用反射膜23將光線完全反射至 擴散板10的入光面11後自出光面12射出，達成將光源30 轉化為面光源，由此縮小背光模組100的體積。另’本實 施例的背光模組100無需於基板20表面形成網點’由此無 需花費人力及無力於模仁表面設置網點圖案來於基板20 表面加工成型網點，因而可大大降低成本。 098120015 第5頁/共11頁 0982034048-0 表單编號A0101 201100922 [0015] 為確保光線反射至整個反射膜21，反射件240可呈其他幾 何形狀，如球狀；反射件40可設於非球面21的焦點，所 述焦點係指過位於非球面21的所有點，作與該點處非球 面21的切線相垂直的直線，所有直線的交點。 [0016] 請參見圖2，本技術方案第二實施例提供的背光模組200 與背光模組100的結構類似，其區域在於：光源230直接 固定於基板220的非球面221的幾何中心；背光模組200 的反射件240嵌設於擴散片210内，且反射件240的反射 面241與擴散片210的入光Φ211共面。 [0017] [0018] 另，反射件240可以部分插入擴散片210内、部分自入光 面211暴露出來的方式嵌設释擴散板210。 综上所述，本發明確已符合發明專利之要件，遂依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施方 式’自不能以此限制本案之申請專利範圍。舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化 〇 皆應涵蓋於以下申請專利範圍内 【圖式簡單說明】 [0019] 圖1係本技術方案第一實施例提供的背光模組的示意圖。 [0020] 圖2係本技術方案第二實施例提供的背光模組的示意圖。 【主要元件符號說明】 [0021] 背光模組 100 、 200 擴散板 10 基板 20 、 220 光源 30 、 230 表單編號A0101 第6頁/共11頁 0982034048-0 098120015 反射件 40 ' 240 入光面 11 、 211 出光面 12 第一表面 24 第一表面 25 非球面 21 、 221 容置槽 22 反射膜 23 擴散片 210 反射面 241 201100922 ❹ 098120015201100922 ^ Sixth, the invention: [0001] The present invention relates to the field of liquid crystal display technology, and more particularly to a backlight module [0002] [Prior Art] Since the liquid crystal panel itself does not have illuminance, the liquid crystal display device A backlight module is required to provide an illumination source for the liquid crystal display device. The conventional backlight module includes a light source, a light guide plate, a reflection plate, a diffusion plate, and a prism plate. The light source is a line source or a point source, which is disposed on one side or two opposite sides of the light guide plate and emits light to the light guide plate. The light guide plate is used for guiding the light transmission direction, so that the light is emitted from the light surface of the light guide plate. The reflection plate δ is placed on the bottom surface side of the light guide plate to reflect the light emitted from the bottom surface of the light guide plate into the light guide plate again. The diffusion plate and the prism plate are sequentially disposed on the side of the light-emitting surface of the light guide plate to make the light distribution from the light guide plate more uniform. In order to further improve the brightness of the liquid crystal display panel and control the brightness uniformity, the scattering point of the light emitted by the light source is usually set at the bottom surface of the light guide plate opposite to the light entrance surface. However, the light source of the conventional backlight module is disposed outside the light guide plate, which results in a thick liquid crystal display device, which is disadvantageous for the thinness and thinness of the liquid crystal display device. In addition, it is necessary to set a dot on the bottom surface of the light guide plate. It is necessary to carry out complex and fine pattern design during the development period of the mold core to form a mesh point on the surface of the mold core, so as to use the mold core to produce (4) depending on the light guide plate, which consumes tAf manpower and material resources. 0 [0004] In view of this, it is necessary to provide a backlight module to simplify the structure of the backlight module and reduce the production cost. 098120015 Form No. A0101 Page 3 of 11 0982034048-0 201100922 * ‘ > [Invention] The ατα real example is an example of a backlight module with a simple structure and low cost. _ μ includes a light source, a reflector, a diffuser, and a substrate. The diffusion has a relative light incident surface and a light exit surface. The substrate has an aspherical surface opposite to the light incident surface, and a receiving groove is formed in the inner surface of the substrate. The aspherical surface is formed with a reflective film. The light source is received in the accommodating groove. The mu-diffusion plate' is opposed to the light source. The reflecting member from the light source is reflected by the reflecting film, and is reflected by the reflecting film to the incident surface, and is emitted from the light emitting surface. [Remuneration technology provides (4) optical mode _ sheathed reflector and reflective film, using the principle of reflection 'the light emitted by the light source is converted into a surface light source through the reflective film and then emitted from the light surface. Compared with the prior art, the backlight module directly sets the light source between the substrate and the diffusion plate, and reduces the volume of the backlight module. No need to put in manpower and material force to design the surface of the mold to set the mesh on the surface of the substrate. thus. Greatly reduce costs. [Embodiment] The backlight module provided by the present technical solution will be described in detail below with reference to the accompanying drawings and embodiments. Referring to FIG. 1 , the backlight module 1 provided in the first embodiment of the present invention includes a diffusion plate 10 , a substrate 20 , a light source 30 , and a reflector 40 . [0010] The diffuser panel 10 has a flat plate shape 'having an opposite light incident surface and a light exit surface 12 . [0011] The substrate 20 is disposed under the diffusion plate 1B, and has a first surface 24 and a second surface 25 opposite to the first surface of the first 098120015 Form No. A0101, No. 482034048-0 201100922. The first surface 24 is opposite to the light incident surface. The substrate 20 is provided with a recess from the first surface 24 to the second surface 25, thereby passing the member to the aspheric surface 21 opposite to the light incident surface 11. The substrate 2 is also provided with a receiving groove 22 from the aspheric surface 21 toward the second surface 25. The substrate 2 can be a transparent material, such as an acrylic resin, a polycarbonate or a polyethylene resin, which is commonly used in the art as a light guide plate, and is formed by injection molding. The aspherical surface 2 is formed with a reflection film 23. The reflective film 23 is made of a material having high reflectivity such as silver, magnesium, gold, platinum, pentoxide, titania, yttria or pentoxide, which can be subjected to chemical vapor deposition, electron beam evaporation, or the like. A sputtering method or the like is formed on the aspheric surface 21. The accommodating groove 22 is for accommodating the light source 30', and its central axis is collinear with the central axis of the substrate 2''. [0012] The light source 30 is received in the accommodating groove 22 for providing illumination light of the backlight unit 1〇〇. Light source 30 can be a complex light emitting diode or a cold cathode fluorescent tube. [0013] The reflecting member 40 is fixed to the light incident surface 11 of the diffusing plate 1 其 which is opposite to the light source 30 for reflecting the light emitted from the light source 30 to the reflecting film 21. The reflecting member 40 can be a reflecting sheet commonly used in the art. [0014] The backlight module 100 of the present embodiment, by accommodating the light source 30 in the substrate 20, reflects the light emitted from the light source 30 to the reflective film 23 by using the reflecting member 40 located at the central axis of the substrate 20, and then uses the reflection. The film 23 completely reflects the light to the light incident surface 11 of the diffusing plate 10, and then emits the light from the light emitting surface 12, thereby converting the light source 30 into a surface light source, thereby reducing the volume of the backlight module 100. Further, the backlight module 100 of the present embodiment does not need to form dots on the surface of the substrate 20, thereby eliminating the need for labor and force on the surface of the mold to form a dot pattern on the surface of the substrate 20, thereby greatly reducing the cost. 098120015 Page 5 of 11 0982034048-0 Form No. A0101 201100922 [0015] In order to ensure that light is reflected to the entire reflective film 21, the reflecting member 240 may have other geometric shapes, such as a spherical shape; the reflecting member 40 may be disposed on the aspheric surface. The focus of 21, which refers to all points on the aspheric surface 21, a straight line perpendicular to the tangent of the aspheric surface 21 at the point, the intersection of all the straight lines. [0016] Referring to FIG. 2, the backlight module 200 of the second embodiment of the present invention is similar in structure to the backlight module 100, and the area is that the light source 230 is directly fixed to the geometric center of the aspheric surface 221 of the substrate 220; The reflector 240 of the module 200 is embedded in the diffusion sheet 210, and the reflection surface 241 of the reflector 240 is coplanar with the incident light Φ211 of the diffusion sheet 210. [0018] In addition, the reflection member 240 may be partially inserted into the diffusion sheet 210, and the diffusion plate 210 may be embedded in a manner partially exposed from the light incident surface 211. In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, which is not intended to limit the scope of the patent application of the present invention. The equivalent modifications or variations made by those skilled in the art to the spirit of the present invention are intended to be included in the following claims. [FIG. 1] FIG. 1 is a first embodiment of the present technical solution. A schematic diagram of a backlight module. 2 is a schematic diagram of a backlight module according to a second embodiment of the present technical solution. [Description of main component symbols] [0021] backlight module 100, 200 diffuser 10 substrate 20, 220 light source 30, 230 form number A0101 page 6 / total 11 page 0992034048-0 098120015 reflector 40 '240 into the light surface 11, 211 light-emitting surface 12 first surface 24 first surface 25 aspheric surface 21, 221 accommodating groove 22 reflective film 23 diffusion sheet 210 reflective surface 241 201100922 ❹ 098120015
表單編號A0101 第7頁/共11頁 0982034048-0Form No. A0101 Page 7 of 11 0982034048-0