201232114 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組，且特別是有關於一種 適用於立體液晶顯示器（3D LCD)之背光模組。 【先前技術】 請參照第1圖，其係繪示一種傳統背光模組之裝置示 意圖。此背光模組100主要包含導光板102與二光源模組 • ma與mb。導光板102具有二入光面1〇4與106，其中 此二入光面104與106位於導光板102之相對二側。每個 光源模組112a與112b主要包含數個發光二極體108與電 路板110。其中，這些發光二極體108設置在電路板110 上，並與電路板110電性連接。 在背光模組1〇〇中，此二光源模組112a與112b分別 鄰設於導光板102之入光面104與106。此外，這些光源 模組112a與112b之發光二極體108所發出之光均朝向其 • 所鄰近之入光面104與106。因此，此二光源模組112a與 112b分別朝向彼此發光。 每個二光源模組112a與112b所發出之光分別從導光 板102之入光面104與106射入導光板102，再經由導光 板102的傳導，而分別射向導光板102之入光面106與 104。然而，入光面106與104會反射入射光。 而當背光模組100單側發光時，亦即僅光源模組112a 或112b發光時，導光板102之反入光側所產生的反射將會 影響光的指向性。如此一來，此傳統背光模組1〇〇應用於201232114 VI. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a backlight module suitable for a stereoscopic liquid crystal display (3D LCD). [Prior Art] Referring to Fig. 1, a schematic diagram of a conventional backlight module is shown. The backlight module 100 mainly includes a light guide plate 102 and two light source modules • ma and mb. The light guide plate 102 has two light incident surfaces 1〇4 and 106, wherein the two light incident surfaces 104 and 106 are located on opposite sides of the light guide plate 102. Each of the light source modules 112a and 112b mainly includes a plurality of light emitting diodes 108 and a circuit board 110. The LEDs 108 are disposed on the circuit board 110 and electrically connected to the circuit board 110. In the backlight module 1 , the two light source modules 112 a and 112 b are respectively disposed adjacent to the light incident surfaces 104 and 106 of the light guide plate 102 . In addition, the light emitted by the light-emitting diodes 108 of the light source modules 112a and 112b are directed toward the light-incident surfaces 104 and 106 adjacent thereto. Therefore, the two light source modules 112a and 112b respectively emit light toward each other. The light emitted by each of the two light source modules 112a and 112b is incident on the light guide plate 102 from the light incident surfaces 104 and 106 of the light guide plate 102, and then transmitted through the light guide plate 102 to respectively enter the light incident surface 106 of the light guide plate 102. With 104. However, the light incident surfaces 106 and 104 reflect the incident light. When the backlight module 100 emits light on one side, that is, when only the light source module 112a or 112b emits light, the reflection caused by the light incident side of the light guide plate 102 will affect the directivity of the light. In this way, the conventional backlight module 1〇〇 is applied
I .j J 4 201232114 光源指向性要求高之產品，例如立體液晶顯示器等產品 時，會有殘影產生，而嚴重影響顯示品質。 【發明内容】 因此，本發明之一態樣就是在提供一種背光模組，其 在相對於導光板之入光側的另一側面上設置吸光層，如此 一來，可有效降低入光側之另一端反射回來之光線。 本發明之另一態樣是在提供一種背光模組，其應用於 具雙側入光之立體液晶顯示器中時，可提升單側光源模組 發光時的指向性，進而可避免殘影的產生。 根據本發明之上述目的，提出一種背光模組。此背光 模組包含一導光板、一第一光源模組以及一第二光源模 組。導光板包含相對之第一入光面與第二入光面。其中， 第一入光面設有複數個第一吸光層，且第二入光面設有複 數個第二吸光層。第一光源模組包含第一電路板、與複數 個第一發光二極體配置於第一電路板上。其中，第一光源 模組鄰設第一入光面，且前述之第一吸光層與這些第一發 光二極體交錯排列。第二光源模組包含第二電路板、與複 數個第二發光二極體配置於第二電路板上。其中，第二光 源模組鄰設第二入光面，且前述之第二吸光層與這些第二 發光二極體交錯排列。 依據本發明之一實施例，上述之每一第一吸光層與第 二吸光層可包含一黑色吸光材料，例如黑膠或黑漆。 依據本發明之另一實施例，上述之第一吸光層分別位 於第二發光二極體之相對面，且上述之第二吸光層分別位 201232114 於第一發光二極體之相對面。 依據本發明之又一實施例，上述之第一發光二極體之 相鄰二者的間隙可為介於此相鄰二者之第一吸光層所完全 或部分遮覆。 依據本發明之再一實施例，上述之第二發光二極體之 相鄰二者的間隙可為介於此相鄰二者之第二吸光層所完全 或部分遮覆。 依據本發明之再一實施例’上述之背光模組可為立體 Φ 液晶顯示器之背光模組。 運用本發明之實施方式，可有效降低入光側之另—端 反射回來之光線。因此，本發明之背光模組應用於具雙側 入，之立體液晶顯示器中時，可提升單側光源模組發光時 的指向性，進而可避免殘影的產生。 【實施方式】 請參照第2圖，其係繪示依照本發明之一實施方式的 籲 種者光模組之裝置示意圖。在本實施方式中，背光模組 200係一雙邊入光的背光模組。因此，背光模組2〇〇可為 立體液晶顯示器之背光模組。 背光模組200主要包含導光板2〇2、以及二光源模組 216與222。導光板202可導引射入其中之光線的方向，藉 此提高背光模組200整體之輝度與亮度的均勻度。在本實 施方式中，配合二光源模組216與222的採用，導光板2〇2 可對應包含二入光面204與206。其中，此二入光面204 與206位於導光板2〇2之相對二側。 201232114 在背光模組200中，導光板202之入光面204與206 可分別設有吸光層208與210。在入光面204與206上分 別設置吸光層208與210時，可利用例如印刷、塗布或貼 附高吸光材質的方式來形成吸光層208與210。吸光層208 與210可例如包含黑色吸光材料。在一實施例中，吸光層 208與210可包含黑膠。在另一實施例中，吸光層208與 210可包含黑漆。 光源模組216包含電路板214與數個發光二極體212。 這些發光二極體212配置在電路板214上，且與電路板214 電性連接。發光二極體212較佳係均勻排列在電路板214 之表面上，以提高背光模組200之亮度的均勻度。電路板 214可為一般之印刷電路板(PCB)或軟性電路板(FPC)。 相同地，光源模組222包含電路板220與數個發光二 極體218。這些發光二極體218配置在電路板220上，且 與電路板220電性連接。發光二極體218較佳亦均勻排列 在電路板220之表面上，以利提高背光模組200之亮度的 均勻度。電路板220可為一般之印刷電路板或軟性電路板。 在背光模組200中，光源模組216鄰設於導光板202 之入光面204，且發光二極體212之出光面直接面對此入 光面204。此外，這些發光二極體212與導光板202之入 光面204上的吸光層208交錯排列。亦即，在第2圖所示 之實施例中，除了最外兩側之發光二極體212外，光源模 組216之每個發光二極體212均介於相鄰二吸光層208之 間。 在一實施例中，如第2圖所示，相鄰二發光二極體212 2〇1232114 吸伞=間隙224 ’被介於此相鄰二發光二極體212之間的 極體；ι;08兀王遮覆住。在另一實施例中’相鄰二發光二 二極體9《間的間隙224，可未完全被介於此相鄰二發光 應 12之間的吸光層208遮覆住，此間隙224僅被對 吸光層208所部分遮覆。 且路^源模組222則鄰設於導光板搬之另—入光面206, “一極體218之出光面直接面對此入光面2〇6。類似I .j J 4 201232114 Products with high directivity requirements for light source, such as stereo LCD monitors, have residual images that can seriously affect display quality. SUMMARY OF THE INVENTION Therefore, an aspect of the present invention provides a backlight module that is provided with a light absorbing layer on the other side of the light incident side of the light guide plate, thereby effectively reducing the light entering side. The light reflected back at the other end. Another aspect of the present invention is to provide a backlight module, which can improve the directivity of a single-side light source module when illuminated in a stereoscopic liquid crystal display with double-sided light input, thereby avoiding the generation of residual images. . According to the above object of the present invention, a backlight module is proposed. The backlight module comprises a light guide plate, a first light source module and a second light source module. The light guide plate includes a first light incident surface and a second light incident surface. The first light incident surface is provided with a plurality of first light absorbing layers, and the second light incident surface is provided with a plurality of second light absorbing layers. The first light source module includes a first circuit board and a plurality of first light emitting diodes disposed on the first circuit board. The first light source module is adjacent to the first light incident surface, and the first light absorbing layer is staggered with the first light emitting diodes. The second light source module includes a second circuit board and a plurality of second light emitting diodes disposed on the second circuit board. The second light source module is adjacent to the second light incident surface, and the second light absorbing layer is staggered with the second light emitting diodes. According to an embodiment of the invention, each of the first light absorbing layer and the second light absorbing layer may comprise a black light absorbing material such as black glue or black lacquer. According to another embodiment of the present invention, the first light absorbing layer is respectively located on the opposite side of the second light emitting diode, and the second light absorbing layer is located at 201232114 on the opposite side of the first light emitting diode. According to still another embodiment of the present invention, the gap between adjacent ones of the first light emitting diodes may be completely or partially covered by the first light absorbing layer adjacent to the two adjacent light emitting diodes. According to still another embodiment of the present invention, the gap between adjacent ones of the second light emitting diodes may be completely or partially covered by the second light absorbing layer adjacent to the two adjacent light emitting diodes. According to still another embodiment of the present invention, the backlight module may be a backlight module of a stereo Φ liquid crystal display. By using the embodiment of the present invention, the light reflected from the other end of the light incident side can be effectively reduced. Therefore, when the backlight module of the present invention is applied to a stereoscopic liquid crystal display having a double-sided input, the directivity of the single-side light source module during illumination can be improved, thereby preventing generation of residual images. [Embodiment] Please refer to FIG. 2, which is a schematic diagram of an apparatus for an optical module of an applicant according to an embodiment of the present invention. In this embodiment, the backlight module 200 is a backlight module that is bilaterally incident light. Therefore, the backlight module 2 can be a backlight module of the stereoscopic liquid crystal display. The backlight module 200 mainly includes a light guide plate 2〇2 and two light source modules 216 and 222. The light guide plate 202 can guide the direction of the light incident therein, thereby improving the uniformity of brightness and brightness of the backlight module 200 as a whole. In this embodiment, the light guide plate 2〇2 can include the two light entrance surfaces 204 and 206 corresponding to the use of the two light source modules 216 and 222. The two light incident surfaces 204 and 206 are located on opposite sides of the light guide plate 2〇2. 201232114 In the backlight module 200, the light incident surfaces 204 and 206 of the light guide plate 202 may be respectively provided with light absorbing layers 208 and 210. When the light absorbing layers 208 and 210 are separately disposed on the light incident surfaces 204 and 206, the light absorbing layers 208 and 210 can be formed by, for example, printing, coating, or attaching a highly light absorbing material. Light absorbing layers 208 and 210 can, for example, comprise a black light absorbing material. In an embodiment, the light absorbing layers 208 and 210 may comprise black glue. In another embodiment, light absorbing layers 208 and 210 may comprise black lacquer. The light source module 216 includes a circuit board 214 and a plurality of light emitting diodes 212. The LEDs 212 are disposed on the circuit board 214 and electrically connected to the circuit board 214. The LEDs 212 are preferably evenly arranged on the surface of the circuit board 214 to improve the uniformity of the brightness of the backlight module 200. Circuit board 214 can be a general printed circuit board (PCB) or a flexible circuit board (FPC). Similarly, the light source module 222 includes a circuit board 220 and a plurality of light emitting diodes 218. The LEDs 218 are disposed on the circuit board 220 and electrically connected to the circuit board 220. Preferably, the LEDs 218 are evenly arranged on the surface of the circuit board 220 to improve the uniformity of the brightness of the backlight module 200. The circuit board 220 can be a general printed circuit board or a flexible circuit board. In the backlight module 200, the light source module 216 is disposed adjacent to the light incident surface 204 of the light guide plate 202, and the light emitting surface of the light emitting diode 212 directly faces the light incident surface 204. In addition, the light-emitting diodes 212 are staggered with the light-absorbing layer 208 on the light-incident surface 204 of the light guide plate 202. That is, in the embodiment shown in FIG. 2, in addition to the outermost two-layer LED 212, each of the light-emitting diodes 216 of the light source module 216 is interposed between the adjacent two light-absorbing layers 208. . In an embodiment, as shown in FIG. 2, adjacent two light-emitting diodes 212 2 〇 1232114 absorbing umbrella = gap 224 ′ is interposed between the adjacent two light-emitting diodes 212; 08 Yu Wang covered. In another embodiment, the gap 224 between the adjacent two-light-emitting diodes 9 may not be completely covered by the light-absorbing layer 208 between the adjacent two-light-emitting layers 12, and the gap 224 is only Partially obscuring the light absorbing layer 208. And the path source module 222 is adjacent to the other light-incident surface 206 of the light guide plate, and the light-emitting surface of the one-pole body 218 directly faces the light-incident surface 2〇6.
^些發光二極體218與導敍逝之入光面施上的 先層210交錯排列。也就是說，在第2圖所示之實施例 光源模組222之每個發光二極體218均介於相鄰二吸 光層21 〇之間。 在實施例中，如第2圖所示，相鄰二發光二極體218 之間的間隙226 ’被介於此相鄰二發光二極體218之間的 吸光層210完全遮覆住。然而，在另一實施例中，相鄰二 發光二極體218之間的間隙226,可未完全被介於此相鄰 二發光二極體218之間的吸光層21()遮覆住，此間隙⑽ 僅被對應之吸光層210所部分遮覆。 ，在一較佳實施例中，如第2圖所示，導光板2〇2之入 光面204上的吸光層208可分別與對側之光源模經奶上 的發光二極體218相面對’而另—入光面施上的吸光層 210則可分別與對側之光源· 216上的發光二極體212 相面對。也就是說’為了達到更有效地降低導光板皿之 入光側的另i對於入射光線的反射’導光板搬之入光 面204的吸光層208較佳係正對相對側之光源模組222的 發光二極體218 ;而相對側之入光面施的吸光層21〇較 201232114 佳則係正對相對側之光源模組216的發光二極體212。 當然，在另一些實施例中，導光板202之入光面204 上的吸光層208亦可不正對對側之光源模組222上的發光 二極體218,而另一入光面206上的吸光層210可不正對 對側之光源模組216上的發光二極體212。 由於，立體液晶顯示器在運轉時，雙邊入光之背光模 組中的二光源模組與係輪流啟動。因此，當本實施方式之 背光模組200應用在立體液晶顯示器中時，分別設置於導 光板202之入光面204與206上的吸光層208與210可有 效降低入光側之另一端反射回來之光線。故，本實施方式 之背光模組應用於立體液晶顯示器時，可大幅改善殘影問 題，達到提升顯示品質的目的。 由上述之實施方式可知，本發明之一優點就是因為本 發明之背光模組在相對於導光板之入光侧的另一側面上設 置吸光層，因此可有效降低入光側之另一端反射回來之光 線。 由上述之實施方式可知，本發明之另一優點就是因為 本發明之背光模組應用於具雙側入光之立體液晶顯示器中 時，可提升單側光源模組發光時的指向性，進而可避免殘 影的產生。 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，任何在此技術領域中具有通常知識者，在不脫離 本發明之精神和範圍内，當可作各種之更動與潤飾，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 201232114 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之說明如下： 第1圖係繪示一種傳統背光模組之裝置示意圖。 第2圖係繪示依照本發明之一實施方式的一種背光模 組之裝置示意圖。 φ 【主要元件符號說明】 100 :背光模組 102 ： 導光板 104 :入光面 106 ： 入光面 108 :發光二極體 110 ： 電路板 112a :光源模組 112b :光源模組 200 :背光模組 202 ： 導光板 204 :入光面 206 ： 入光面 208 :吸光層 210 ： 吸光層 212 :發光二極體 214 ： 電路板 216 :光源模組 218 ： 發光二極體 220 :電路板 222 ： 光源模組 224 :間隙 226 ： 間隙 10The light-emitting diodes 218 are staggered with the first layer 210 applied to the light-emitting surface. That is to say, each of the light-emitting diodes 218 of the light source module 222 of the embodiment shown in Fig. 2 is interposed between the adjacent two light absorbing layers 21 。. In the embodiment, as shown in Fig. 2, the gap 226' between the adjacent two light-emitting diodes 218 is completely covered by the light absorbing layer 210 interposed between the adjacent two light-emitting diodes 218. However, in another embodiment, the gap 226 between the adjacent two LEDs 218 may not be completely covered by the light absorbing layer 21 () between the adjacent two LEDs 218, This gap (10) is only partially covered by the corresponding light absorbing layer 210. In a preferred embodiment, as shown in FIG. 2, the light absorbing layer 208 on the light incident surface 204 of the light guide plate 2〇2 can respectively face the light source diode 218 on the opposite side of the light source die. The light absorbing layer 210 applied to the other light incident surface may face the light emitting diode 212 on the opposite side light source 216, respectively. That is to say, in order to achieve more effective reduction of the light incident side of the light guide plate, the light absorbing layer 208 of the light guide surface of the light guide plate is preferably opposite to the light source module 222 of the opposite side. The light-emitting diode 21 of the light source module 216 on the opposite side is better than the 201232114. Of course, in other embodiments, the light absorbing layer 208 on the light incident surface 204 of the light guide plate 202 may not be opposite to the light emitting diode 218 on the opposite side light source module 222, and the other light incident surface 206 The light absorbing layer 210 may not face the light emitting diode 212 on the opposite side light source module 216. Since, when the stereoscopic liquid crystal display is in operation, the two light source modules and the system in the bilaterally-incorporated backlight module are activated in turn. Therefore, when the backlight module 200 of the present embodiment is applied to a stereoscopic liquid crystal display, the light absorbing layers 208 and 210 respectively disposed on the light incident surfaces 204 and 206 of the light guide plate 202 can effectively reduce the reflection of the other end of the light incident side. Light. Therefore, when the backlight module of the present embodiment is applied to a stereoscopic liquid crystal display, the problem of image sticking can be greatly improved, and the display quality can be improved. According to the above embodiments, an advantage of the present invention is that the backlight module of the present invention is provided with a light absorbing layer on the other side of the light incident side of the light guide plate, so that the other end of the light incident side can be effectively reflected back. Light. It can be seen from the above embodiments that another advantage of the present invention is that the backlight module of the present invention can improve the directivity of the single-side light source module when it is applied to a stereoscopic liquid crystal display with two sides. Avoid the generation of afterimages. While the present invention has been described above by way of example, it is not intended to be construed as a limitation of the scope of the invention. Therefore, the scope of the present invention is defined by the scope of the appended claims, which are defined by the appended claims. The present invention and the other objects, features, advantages and embodiments of the present invention can be more clearly understood. The description of the formula is as follows: FIG. 1 is a schematic diagram of a device of a conventional backlight module. 2 is a schematic view of a device of a backlight module according to an embodiment of the present invention. Φ [Main component symbol description] 100: backlight module 102: light guide plate 104: light incident surface 106: light incident surface 108: light emitting diode 110: circuit board 112a: light source module 112b: light source module 200: backlight mode Group 202: light guide plate 204: light incident surface 206: light incident surface 208: light absorbing layer 210: light absorbing layer 212: light emitting diode 214: circuit board 216: light source module 218: light emitting diode 220: circuit board 222: Light source module 224: gap 226: gap 10