1358004 100年.09月27日修正_丨 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種背光模組，尤其涉及一種出光均勻之背 光模組》 【先前技術】 [0002] 液晶顯示面板（LCD Panel )、地磚塾（Floor Mat)及廣 告看板（Advertising Board)等顯示裝置已經廣泛應用 於人們之日常生活中。由於該種顯示裝置具非自發光性 質，因此通常需要提供一外部光源元件作為該種顯示裝 置之背光模組以向其提供背光照明。目前，發光二極體 (Light Emitting Diode, LED)因具高亮度、長使用 壽命'廣色域（Wide Color Gamut)等特性而逐漸取代 冷陰極榮光燈（Cold Cathode Fluorescent Lamp， CCFL)以用作該種光源組件之光源，具體可參見Chen等 人於文獻IEEE Transactions on Power Electronics, Vol. 22， No.3 (2007年5 月） 中發表之 “Sequential Color LED Backlight Driving System for LCD Panels” 一文。 [0003] —種典型之光源元件包括一導光板及一光源。該光源由 複數以陣列方式排布之發光二極體（Light Emitting Diode, LED)構成。該光源發出之光經由導光板轉換成 面光源後可向液晶顯示面板、地磚墊及大尺寸看板等顯 示裝置提供背光照明。然而，由於發光二極體為點光源 ，其輻射角度通常小於等於120度；因此導光板之與每個 發光二極體相對之出光區域之中心亮度較高而周邊亮度 096137453 表單編號Α0101 第3頁/共13頁 1003352824-0 1358004 100年.09月27日梭正替換頁. 相對較低，導致整個光源元件之出光均勻性較差，進而 使得採用該種光源元件之顯示裝置之顯示效果不夠理想 〇 【發明内容】 [0004] 下面將以實施例說明一種具有良好出光均勻性之背光模 組及相應之導光板。 [0005] —種背光模組，其包括一導光板及一光源。該導光板包 括一出光面，一與該出光面相對之底面，至少一從該導 光板之底面向内凹陷之容置孔以及至少一臨近該容置孔 之凹槽，該容置孔包括一靠近該導光板出光面設置之第 一反射面以及至少一與該反射面相連接之入光面，該凹 槽包括一相對於該入光面之第二反射面。該光源設置於 該容置孔内。 [0006] —種導光板包括一出光面，一與該出光面相對之底面， 至少一從該導光板之底面向内凹陷之容置孔，以及至少 一臨近該容置孔之凹槽，該容置孔包括一靠近該導光板 出光面設置之第一反射面以及至少一與該反射面相連接 之入光面，該凹槽包括一相對於該入光面之第二反射面 [0007] 相對於先前技術，該背光模組之光源所發出之光並不是 直接從出光面中相對于光源之區域發射出去，其利用第 一反射面及第二反射面兩次反射後，才將光源所發出之 光從出光面中相對于光源之區域發射出去，因此，可減 小該出光面中相對于光源之區域之亮度，使整個背光模 組之出光均勻性得到提高，以使採用該背光模組之顯示 096137453 表單編號 A0101 第 4 頁/共 13 頁 1003352824-0 1358004 1100年.09月 日 裝置得到理想之顯示效果β 【實施方式】 [0008] [0009] [0010] 下面結合附圖將對本發明實施例作進一步之詳細說明。 請參閱圖1，為本發明第一實施例提供之一種背光模組 100。該背光模組1〇〇包括一導光板110及至少一個與該 導光板110光學耦合之光源120。 該導光板110包括一出光面111，一與該出光面相對之底 面112，至少一個從該底面112向内凹陷之容置孔113， 以及與該至少一個容置孔113相對應之且臨近該容置孔 113設置之至少一個凹槽114 β該容置孔113包括一靠近 該導光板110之出光面111設置之第一反射面115以及一 與該第一反射面115相連接之入光面116。該凹槽114包 括一個相對於該入光面Π6之第二反射面117。該第一反 射面115及第二反射面117上均可塗覆一層反射層，以充 分反射照射於其上之光。 [0011] 該至少一個光源12 0分別相應地設置於該至少一個容置孔 113内。優選之，該光源120為一個LED點光源，其正對 於該容置孔113之第一反射面115。於本實施例中，該第 一反射面115為一平面，其平行於該導光板ho之出光面 111。該第一反射面115之反射率大於或等於99%，以將 該光源120朝向該第一反射面115發出之絕大多數之光都 被反射回去。 [0012] 096137453 該凹槽114可為一個圍繞該容置孔113設置之連續性凹槽 。於本實施例中，該凹槽114之橫截面為v形，其包括一 表單編號A0101 第5頁/共13頁 1003352824-0 1358004 100年.09月日修正替換頁. 第二反射面117，該第二反射面117相對於該入光面116 設置’且該第二反射面117上可塗覆一層反射層以增加其 反射率。該凹槽114也可為反射型之網點結構，其只姜具 有與該入光面116相對設置之第二反射面即可》 [0013] 該導光板11〇可採用一種折射率介於1. 4至1. 6之間之透 明材料所製成。 [0014] 當該背光模組100工作時，該光源120所發出之光，一部 分從該入光面116直接進入至導光板11〇，然後再從該導 光板110之出射面111發射出去》而另一部分則照射至該 第一反射面115，被該第一反射面115反射後通過入光面 11 6進入導光板11〇，該被第一反射面n 5反射進入導光 板110之光中’一部分被導光板110之底面112所反射， 從導光板之出射面111發射出去，而另一部分則被凹槽 114之第二反射面Η?所反射，並從導光板11〇之出射面 111中正對於該光源120之區域發射出去。 [0015] [0016] 096137453 相較於先前技術，本發明所提供之背光模組1〇〇之光源 120所發出之光經由第一反射面115及第二反射面117兩 次反射後’才將光源120所發出之光從出光面111中相對 于光源120之區域發射出去’因此’可減小該出光面111 中相對于光源120之區域之亮度，使整個背光模組1〇〇之 出光均勻性得到提高，以使採用該背光模組之顯示裝置 得到理想之顯示效果。 °月參閱圖2，為本發明第二實施例所提供之另一種背光模 組200 °該背光模組200與第一實施例所提供之背光模組 表單瑪號A0101 第6頁/共13頁 1003352824-0 1358004 100年.09月2>日 100相似，其不同在於’該導光板210中之凹槽213所包 括之第*r反射面215為一圓弧面，該圓弧狀之第一反射面 215朝该四槽213方向凹陷。 [0017] 請參蘭圖3，為本發明第三實施例所提供之另一種背光模 組3〇(^該背光模組300與第一實施例所提供之背光模組 100相似’其不同在於’該導光板310中之凹槽313所包 括之第〆反射面315之橫截面為’其由兩個成一定夾 角之ip·面所構成。 [0018] 綜上所述’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 ，皆應涵蓋於以下申請專利範圍内。 【圖式簡單説明】 [0019] 圖1係本發明第一實施例所提供之一種背光模組之示竟圖 〇 [0020]圖2係本發明第二實施例所提供之一種背光模組之示专圖 〇 [0021] 圖3係本發明第三實施例所提供之一種背光模組之示意圖 〇 【主要元件符號說明】 [0022] 背光模組：100、200、300 [0023] 導光板：110、210、310 096137453 表單編號A0101 第7頁/共13頁 1003352824-0 100年.09月27日核正替^頁， 1358004 [0024] 出光面：111 [0025] 底面：112 [0026] 容置孔：113、213、313 [0027] 凹槽：114 [0028] 第一反射面：115、215、315 [0029] 入光面：116 [0030] 第二反射面：117 [0031] 光源：120 096137453 表單编號A0101 第8頁/共13頁 1003352824-01358004 100 years. September 27th revision _ 丨 、, invention description: [Technical field of invention] [0001] The present invention relates to a backlight module, and more particularly to a backlight module with uniform light emission. [Prior Art] [0002] Display devices such as LCD Panels, Floor Mats, and Advertising Boards have been widely used in people's daily lives. Since such display devices are non-self-luminous, it is often desirable to provide an external light source component as a backlight module for such display devices to provide backlighting thereto. At present, the Light Emitting Diode (LED) is gradually replacing the Cold Cathode Fluorescent Lamp (CCFL) for its high brightness and long life span (Wide Color Gamut). For a light source of such a light source module, see "Sequential Color LED Backlight Driving System for LCD Panels" by Chen et al., IEEE Transactions on Power Electronics, Vol. 22, No. 3 (May 2007). A typical light source component includes a light guide plate and a light source. The light source is composed of a plurality of light emitting diodes (LEDs) arranged in an array. The light emitted by the light source is converted into a surface light source via a light guide plate to provide backlighting to a display device such as a liquid crystal display panel, a floor tile pad, and a large size kanban. However, since the light-emitting diode is a point light source, the radiation angle is usually less than or equal to 120 degrees; therefore, the center brightness of the light-emitting area opposite to each light-emitting diode is higher and the peripheral brightness is 096137453. Form No. Α0101 Page 3 / Total 13 pages 1003352824-0 1358004 100 years. September 27th shuttle replacement page. Relatively low, resulting in poor uniformity of the light output of the entire light source component, which makes the display device using the light source component display effect is not ideal. SUMMARY OF THE INVENTION [0004] Hereinafter, a backlight module having good light uniformity and a corresponding light guide plate will be described by way of embodiments. [0005] A backlight module includes a light guide plate and a light source. The light guide plate includes a light emitting surface, a bottom surface opposite to the light emitting surface, at least one receiving hole recessed from the bottom surface of the light guiding plate, and at least one recess adjacent to the receiving hole, the receiving hole includes a receiving hole a first reflecting surface disposed adjacent to the light emitting surface of the light guide plate and at least one light incident surface connected to the reflecting surface, the groove including a second reflecting surface opposite to the light incident surface. The light source is disposed in the receiving hole. [0006] A light guide plate includes a light emitting surface, a bottom surface opposite to the light emitting surface, at least one receiving hole recessed from a bottom surface of the light guiding plate, and at least one groove adjacent to the receiving hole, The accommodating hole includes a first reflecting surface disposed adjacent to the light emitting surface of the light guide plate and at least one light incident surface connected to the reflecting surface, the groove including a second reflecting surface relative to the light incident surface [0007] In the prior art, the light emitted by the light source of the backlight module is not directly emitted from the light emitting surface relative to the light source, and is reflected by the first reflecting surface and the second reflecting surface twice before the light source is emitted. The light is emitted from the light emitting surface relative to the region of the light source. Therefore, the brightness of the light emitting surface relative to the light source region can be reduced, so that the light uniformity of the entire backlight module is improved, so that the backlight module is used. Display 096137453 Form No. A0101 Page 4 of 13 1003352824-0 1358004 1100. The date of the device is expected to be the desired display effect β [Embodiment] [0008] [0009] [0010] The embodiments of the present invention will be further described in detail. Please refer to FIG. 1 , which illustrates a backlight module 100 according to a first embodiment of the present invention. The backlight module 1A includes a light guide plate 110 and at least one light source 120 optically coupled to the light guide plate 110. The light guide plate 110 includes a light emitting surface 111, a bottom surface 112 opposite to the light emitting surface, at least one receiving hole 113 recessed inwardly from the bottom surface 112, and corresponding to the at least one receiving hole 113 and adjacent thereto. The accommodating hole 113 includes a first reflecting surface 115 disposed adjacent to the light emitting surface 111 of the light guide plate 110 and a light incident surface connected to the first reflecting surface 115. 116. The recess 114 includes a second reflecting surface 117 with respect to the light entrance pupil 6. The first reflective surface 115 and the second reflective surface 117 may each be coated with a reflective layer to sufficiently reflect the light irradiated thereon. [0011] The at least one light source 120 is respectively disposed in the at least one receiving hole 113. Preferably, the light source 120 is an LED point light source that faces the first reflecting surface 115 of the receiving hole 113. In this embodiment, the first reflecting surface 115 is a plane parallel to the light emitting surface 111 of the light guide plate ho. The reflectivity of the first reflecting surface 115 is greater than or equal to 99%, so that most of the light emitted by the light source 120 toward the first reflecting surface 115 is reflected back. [0012] 096137453 The groove 114 can be a continuous groove disposed around the receiving hole 113. In this embodiment, the groove 114 has a V-shaped cross section, and includes a form number A0101, page 5/13 pages, 1003352824-0, 1358004, 100. September, date correction replacement page. Second reflection surface 117, The second reflective surface 117 is disposed with respect to the light incident surface 116 and the second reflective surface 117 may be coated with a reflective layer to increase its reflectivity. The groove 114 can also be a reflective dot structure, and only the ginger has a second reflecting surface disposed opposite to the light incident surface 116. [0013] The light guide plate 11 can adopt a refractive index of 1. Made of a transparent material between 4 and 1.6. [0014] When the backlight module 100 is in operation, part of the light emitted by the light source 120 directly enters the light guide plate 11 from the light incident surface 116, and then is emitted from the exit surface 111 of the light guide plate 110. The other part is irradiated to the first reflective surface 115, reflected by the first reflective surface 115, and then enters the light guide plate 11 through the light incident surface 116, which is reflected into the light of the light guide plate 110 by the first reflective surface n5' A portion is reflected by the bottom surface 112 of the light guide plate 110, is emitted from the exit surface 111 of the light guide plate, and the other portion is reflected by the second reflective surface of the groove 114, and is reflected from the exit surface 111 of the light guide plate 11 The area of the light source 120 is emitted. [0016] 096137453 Compared with the prior art, the light emitted by the light source 120 of the backlight module 1 provided by the present invention is reflected twice by the first reflective surface 115 and the second reflective surface 117. The light emitted by the light source 120 is emitted from the light emitting surface 111 relative to the area of the light source 120. Therefore, the brightness of the light emitting surface 111 relative to the light source 120 can be reduced, so that the entire backlight module 1 emits light uniformly. The performance is improved to achieve a desired display effect by the display device using the backlight module. Referring to FIG. 2, another backlight module 200 is provided according to a second embodiment of the present invention. The backlight module 200 and the backlight module provided in the first embodiment are in the form of a page number A0101. Page 6 of 13 1003352824-0 1358004 100 years. September 2> The same as the day 100, the difference is that the *r reflecting surface 215 included in the groove 213 of the light guide plate 210 is a circular arc surface, and the arc first The reflecting surface 215 is recessed toward the four grooves 213. [0017] Please refer to FIG. 3, which is another backlight module 3 provided in the third embodiment of the present invention. (The backlight module 300 is similar to the backlight module 100 provided in the first embodiment. The cross section of the third reflecting surface 315 included in the groove 313 of the light guiding plate 310 is 'which is composed of two ip faces which are at an angle. [0018] In summary, the present invention has been met. The patent application is filed according to law, but the above description is only a preferred embodiment of the present invention, and the scope of the patent application of the present invention cannot be limited thereby. Those who are familiar with the skill of the present invention are in accordance with the spirit of the present invention. The equivalent modifications or variations are to be included in the following claims. [FIG. 1] FIG. 1 is a schematic diagram of a backlight module according to a first embodiment of the present invention [0020] 2 is a schematic diagram of a backlight module according to a second embodiment of the present invention. [0021] FIG. 3 is a schematic diagram of a backlight module according to a third embodiment of the present invention. [Main component symbol description] [0022] backlight module: 100, 200 300 [0023] Light guide plate: 110, 210, 310 096137453 Form number A0101 Page 7 / Total 13 pages 1003352824-0 100 years. September 27th nuclear replacement ^ page, 1358004 [0024] Light surface: 111 [0025 Bottom surface: 112 [0026] accommodating holes: 113, 213, 313 [0027] Groove: 114 [0028] First reflecting surface: 115, 215, 315 [0029] Light-incident surface: 116 [0030] Second reflection Surface: 117 [0031] Light source: 120 096137453 Form number A0101 Page 8 / Total 13 pages 1003352824-0