201248263 六、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鍵盤。 【先前技術】 背光模組（backlight module )係將點光源或線光源發 出的光線，通過光學結構的設計而成為一面光源的光學模 組。而背光模組的應用領域除了液晶顯示裝置之外，還能 作為發光鍵盤的背光源，以及廣告燈箱等等。隨著產品愈 來愈傾向輕薄的趨勢，背光模組的輕薄化設計，也逐漸成 為一個重要的議題。 然而，在一些情況下，例如使用者很有可能會將液體 不小心灑落於鍵盤，而液體從鍵帽旁邊的縫隙滲入，或者 是放置在建築物外的液晶顯示裝置或廣告燈箱等，在雨天 時沒有良好的防滲措施，使得液體往下有可能直接接觸發 光單元，則會使得發光單元損壞或影響發光品質。 因此，如何提供一種背光模組及鍵盤，能夠防止液體 滲入其内而影響發光，已成為重要課題之一。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種能夠防止 液體直接接觸發光單元而影響發光之背光模組。 為達上述目的，本發明提出一種背光模組，其包含一 導光板、至少一發光單元以及一透光防渗層。導光板具有 201248263 一出光面。發光單元所發出之光線射至導光板。透光防滲 層設置於出光面。 在本發明之一實施例中，發光單元係埋設於導光板。 在本發明之一實施例中，發光單元係埋設於導光板之 出光面。 在本發明之一實施例中，透光防滲層係為一透明層。 在本發明之一實施例中，透光防滲層係藉由一黏著物 質而黏接於導光板。 在本發明之一實施例中，透光防滲層更包含至少一破 孔，而黏著物質設置於破孔周圍。破孔可讓背光模組進行 組裝，而黏著物質設置於破孔周圍可阻擋液體從破孔滲 入0 在本發明之一實施例中，背光模組更包含一光強度調 整圖案，其設置於透光防滲層，並對應發光單元設置。 在本發明之一實施例中，光強度調整圖案包括一白 色反射圖案。 在本發明之一實施例中，背光模組更包含一遮光膜， 其係設置於透光防滲層上。 在本發明之一實施例中，導光板更具有一底面以及至 少一侧面，而底面與出光面相對設置，而侧面連結出光面 與底面，且背光模組更包含一遮光膜，其尺寸大於導光板 之尺寸，其中，遮光膜具有一遮光部，且遮光部係覆蓋導 光板之側面。 在本發明之一實施例中，遮光膜覆蓋導光板之出光 201248263 面、或底面、或出光面與底面。 在本發明之一實施例中，遮光膜係具有複數開口，而 該等開口係分別對應導光板之複數微結構。 在本發明之一實施例中，透光防滲層更包含複數透光 部與複數遮光部。其中，複數透光部係分別對應導光板之 複數微結構。 為達上述目的，本發明更提出一種鍵盤，其包含一導 光板、至少一發光單元、一透光防滲層以及一鍵盤模組。 導光板具有一出光面。發光單元所發出之光線射至導光 板。透光防滲層設置於出光面。鍵盤模組設置於透光防滲 層上。 在本發明之一實施例中，發光單元係埋設於導光板。 在本發明之一實施例中，發光單元係埋設於導光板之 出光面。 在本發明之一實施例中，透光防滲層係為一透明層。 在本發明之一實施例中，透光防滲層係藉由一黏著物 質而黏接於導光板。 在本發明之一實施例中，透光防滲層更包含至少一破 孔，而黏著物質設置於破孔周圍。破孔可讓鍵盤進行組 裝，而黏著物質設置於破孔周圍可阻擋液體從破孔滲入。 在本發明之一實施例中，背光模組更包含一光強度調 整圖案，其設置於透光防滲層，並對應發光單元設置。 在本發明之一實施例中，光強度調整圖案包括一白 色反射圖案。 201248263 在本發明之一實施例中，背光模組更包含一遮光膜， 立係Ϊ置於遂光防滲層上。道 在本發明之一實施例中，導光板更具有一底面以及至 ,，而底面與出光面相對設置，而側面連結出光面 少一側面，叫 ， 办十工日鍵盤更包含一遮光膜，其尺寸大於導光板之尺 與底面，苏娜 寸，其中，遮光膜具有一遮光°卩，且遮光部係覆蓋導光板 之侧面。 在本發明之一實施例中，遮光膜覆蓋導光板之出光 面、或底面、或出光面與底面。 在本發明之一實施例中，遮光臈係具有複數開口，而 該等開口係分別對應導光板之複數微結構。 在本發明之一實施例中，透光防滲層更包含複數透光 部與複數遮光部。其中’複數透光部係分別對應導光板之 複數微結構。 承上所述，本發明之背光模組係將透光防滲層設置於 導光板上，藉此可避免液體滲入發光單元内，進而達到保 護發光單元之功效，也維持了發光品質。 【實施方式】 以下將參照相關圖式， 種背光模組及鍵盤’其令相 加以說明。 說明依本發明複數實施例之一 同的元件將以相同的參照符號 請參照圖1及圖2所示， 一種背光模組1的分解示意圖 圖1為本發明較佳實施例之 ，而圖2為本發明較佳實施 201248263 例之另-種背光模組1的分解示意圖。在本實施例中，背 光模組1包含一導光板u、—發光單元12以及一透光防 渗層13,其中，背光模組！可以應用於鍵盤、液晶顯示裝 置或是廣告燈箱，於此，係先以應用於鍵盤的背光模組】 為例。 導光板11具有一出光面η卜與出光面lu相對之一 底面n2以及一側面113，而側面113係與出光面ηι& 底面m相連接。其中，f光模组i可以在導光板u的底 面112或側面113增設一反射片14 (如圖2所示），以提 高導光板11的光線利用率。本實施例係以反射片丨4設置 於底面112為例。 發光單元12所發出之光線射至導光板u，藉由導光 板11將光線由出光面ηι射出。發光單元12可埋設於導 光板11之出光面ill，或可埋設於底面112、或側面ιΐ3、 或可不埋設於導光板11内，而是面對於導光板u之任何 一側面113或底面212來設置。本實施例係以發光單元12 埋設於導光板11之出光面1U為例。發光單元12係包含 已封裝的發光二極體或發光二極體晶粒。本實施例中，導 光板11的出光面111可具有複數微結構M，微結構乂可 將光線射出於導光板11之出光面1U。 透光防滲層13設置於出光面m，其中，透光防滲層 13可為一膜片，其材質可以是聚碳酸酯（PC)、或聚對苯 一甲酸乙二g旨（PET)、或其他防渗之可塑性材質，並不加 以限制。本實施例之透光防滲層13係以聚碳酸醋為例， 201248263201248263 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a backlight module and a keyboard. [Prior Art] A backlight module is a light module that emits light from a point source or a line source through the design of an optical structure. In addition to the liquid crystal display device, the application field of the backlight module can also serve as a backlight for the illuminated keyboard, as well as an advertising light box and the like. As products become more and more light and thin, the thin and light design of backlight modules has gradually become an important issue. However, in some cases, for example, the user is likely to accidentally spill liquid on the keyboard, and the liquid penetrates from the gap beside the keycap, or is placed in a liquid crystal display device or advertising light box outside the building, etc., in rainy days. When there is no good anti-seepage measure, the liquid may be directly contacted with the light-emitting unit, which may cause the light-emitting unit to be damaged or affect the light-emitting quality. Therefore, how to provide a backlight module and a keyboard, which can prevent liquid from penetrating into it and affecting light emission, has become one of the important topics. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a backlight module capable of preventing liquid from directly contacting a light emitting unit and affecting light emission. To achieve the above objective, the present invention provides a backlight module including a light guide plate, at least one light emitting unit, and a light transmissive barrier layer. The light guide plate has a light surface of 201248263. The light emitted by the light emitting unit is incident on the light guide plate. The transparent anti-seepage layer is disposed on the light-emitting surface. In an embodiment of the invention, the light emitting unit is embedded in the light guide plate. In an embodiment of the invention, the light emitting unit is embedded in the light emitting surface of the light guide plate. In an embodiment of the invention, the light transmissive barrier layer is a transparent layer. In an embodiment of the invention, the light transmissive barrier layer is adhered to the light guide plate by an adhesive substance. In an embodiment of the invention, the light transmissive barrier layer further comprises at least one broken hole, and the adhesive substance is disposed around the broken hole. The hole module can be assembled by the backlight module, and the adhesive material is disposed around the hole to block the penetration of the liquid from the hole. In one embodiment of the invention, the backlight module further comprises a light intensity adjustment pattern. Light barrier layer, and corresponding to the lighting unit settings. In an embodiment of the invention, the light intensity adjustment pattern comprises a white reflective pattern. In an embodiment of the invention, the backlight module further includes a light shielding film disposed on the light transmissive barrier layer. In an embodiment of the present invention, the light guide plate further has a bottom surface and at least one side surface, and the bottom surface is opposite to the light emitting surface, and the side surface is connected to the light surface and the bottom surface, and the backlight module further comprises a light shielding film, and the size thereof is larger than the guide. The size of the light plate, wherein the light shielding film has a light shielding portion, and the light shielding portion covers the side surface of the light guide plate. In an embodiment of the invention, the light shielding film covers the light exiting the light guide plate 201248263, or the bottom surface, or the light exit surface and the bottom surface. In an embodiment of the invention, the light shielding film has a plurality of openings, and the openings respectively correspond to the plurality of microstructures of the light guide plate. In an embodiment of the invention, the light transmissive barrier layer further comprises a plurality of light transmissive portions and a plurality of light shielding portions. Wherein, the plurality of light transmitting portions respectively correspond to the plurality of microstructures of the light guide plate. To achieve the above objective, the present invention further provides a keyboard comprising a light guide plate, at least one light emitting unit, a light transmissive barrier layer, and a keyboard module. The light guide plate has a light exit surface. The light emitted by the light unit is incident on the light guide plate. The transparent anti-seepage layer is disposed on the light-emitting surface. The keyboard module is disposed on the transparent barrier layer. In an embodiment of the invention, the light emitting unit is embedded in the light guide plate. In an embodiment of the invention, the light emitting unit is embedded in the light emitting surface of the light guide plate. In an embodiment of the invention, the light transmissive barrier layer is a transparent layer. In an embodiment of the invention, the light transmissive barrier layer is adhered to the light guide plate by an adhesive substance. In an embodiment of the invention, the light transmissive barrier layer further comprises at least one broken hole, and the adhesive substance is disposed around the broken hole. The holes allow the keyboard to be assembled, and the adhesive material is placed around the holes to prevent liquid from penetrating through the holes. In an embodiment of the invention, the backlight module further includes a light intensity adjustment pattern disposed on the light transmissive barrier layer and disposed corresponding to the light emitting unit. In an embodiment of the invention, the light intensity adjustment pattern comprises a white reflective pattern. 201248263 In an embodiment of the invention, the backlight module further comprises a light shielding film, and the vertical raft is disposed on the glazing barrier layer. In an embodiment of the present invention, the light guide plate further has a bottom surface and a bottom surface, and the bottom surface is opposite to the light-emitting surface, and the side surface is connected with the light surface and has one side surface, and the keyboard has a light-shielding film. The size is larger than the ruler and the bottom surface of the light guide plate, wherein the light shielding film has a light shielding layer, and the light shielding portion covers the side surface of the light guide plate. In one embodiment of the invention, the light shielding film covers the light exit surface, or the bottom surface, or the light exit surface and the bottom surface of the light guide plate. In an embodiment of the invention, the shading system has a plurality of openings, and the openings respectively correspond to the plurality of microstructures of the light guide plate. In an embodiment of the invention, the light transmissive barrier layer further comprises a plurality of light transmissive portions and a plurality of light shielding portions. Wherein the plurality of light transmitting portions respectively correspond to the plurality of microstructures of the light guide plate. As described above, the backlight module of the present invention has a light-transmitting and impermeable layer disposed on the light guide plate, thereby preventing liquid from penetrating into the light-emitting unit, thereby achieving the effect of protecting the light-emitting unit and maintaining the light-emitting quality. [Embodiment] Hereinafter, a backlight module and a keyboard will be described with reference to the related drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 and FIG. 2, an exemplary embodiment of a plurality of embodiments of the present invention will be described with reference to FIG. 1 and FIG. 2. FIG. 1 is a schematic view of a preferred embodiment of the present invention, and FIG. The present invention preferably implements an exploded view of another backlight module 1 of the example of 201248263. In this embodiment, the backlight module 1 includes a light guide plate u, a light emitting unit 12, and a light transmissive layer 13, wherein the backlight module! It can be applied to keyboards, liquid crystal display devices or advertising light boxes. Here, the backlight module applied to the keyboard is taken as an example. The light guide plate 11 has a light-emitting surface n opposite to the light-emitting surface lu, a bottom surface n2 and a side surface 113, and the side surface 113 is connected to the light-emitting surface ηι& The f-light module i can add a reflective sheet 14 (shown in FIG. 2) to the bottom surface 112 or the side surface 113 of the light guide plate u to improve the light utilization efficiency of the light guide plate 11. In this embodiment, the reflection sheet 4 is disposed on the bottom surface 112 as an example. The light emitted from the light-emitting unit 12 is incident on the light guide plate u, and the light is emitted from the light-emitting surface η by the light guide plate 11. The light-emitting unit 12 may be embedded in the light-emitting surface ill of the light guide plate 11 or may be embedded in the bottom surface 112 or the side surface ι 3 or may not be embedded in the light guide plate 11 but may face any one side 113 or bottom surface 212 of the light guide plate u. Settings. In this embodiment, the light-emitting surface 12 is embedded in the light-emitting surface 1U of the light guide plate 11 as an example. The light emitting unit 12 includes encapsulated light emitting diodes or light emitting diode crystal grains. In this embodiment, the light-emitting surface 111 of the light guide plate 11 may have a plurality of microstructures M, and the microstructures may emit light to the light-emitting surface 1U of the light guide plate 11. The light-transmitting and impermeable layer 13 is disposed on the light-emitting surface m, wherein the light-transmitting and impermeable layer 13 can be a film, and the material thereof can be polycarbonate (PC) or polyethylene terephthalate (PET). Or other impervious plastic materials are not limited. The light-transmitting and anti-seepage layer 13 of this embodiment is taken as an example of polycarbonate. 201248263
出光面111黏接。 透光防滲® η且一、丨…乂…-一黏著物 之膠體或 11之出光面ill黏接。The light-emitting surface 111 is bonded. Translucent anti-seepage® η and one, 丨...乂...-- an adhesive or a glaze of 11 is bonded.
，用於背光模組1與其他部件（例 0，且For backlight module 1 and other components (example 0, and
影響發光品質。 如底........ 圍， 請參照圖3Α及圖3Β所示，其為本發明較佳實施例之 再種煮光模組2的剖面示意圖。在本實施例中，背光模 組2更包含一光強度調整圖案25，其設置於透光防滲層 23之下表面，並對應各發光單元22設置。藉由光強度調 整圖案25的設置，可減少發光單元22處的光線過量， 以避免在對應發光單元22的位置處所產生的局部光線 太強現象，進而使背光模組2整體亮度更加均勻。 請參照圖3Α所示，光強度調整圖案25設置於透光 防滲層23 ’例如是靠近導光板21之表面，當然，也可以 設置於透光防滲層23遠離導光板21之表面，並不做限 制’本發明以設置於透光防滲層23靠近導光板21之表 面為例。光強度調整圖案25是局部地設置在對應發光 單元22處之透光防滲層23、且光強度調整圖案25可圍 繞於發光單元22的周圍而設置。 在本實施例中，光強度調整圖案25可以是白色反〜 201248263 射圖案。如此，可以將直接來自發光單元22的光線反 射回導光板21中，以提昇光線的使用效率。當然，光 強度調整圖案25也可以是不透光圖案，如此一來，可 以吸收直接來自於發光單元22的光線，減少光線過量 射出’可防止造成鍵盤整體亮度不均。 請參照目3B所示，在本實施例中，力強度調整圖案 5更可覆蓋在發光單元22的上方而設置，以發揮更好 的光強度調整效果，亦即，可將直接來 的光線反射回導先板21中，以提昇光線的使？:率2: j，還可防止來自發光單元22的光線直接射出，而 對應發光單元22的位置處所產生的局部光線太 5$現冢。 …請參照® 4所示，其為本發明較佳實_之再一種背 光模組3的分解示意圖。在本實施例中，與前述實施例之 主要不同處為’背錢組3更可包含—遮光膜％，遮光膜 36設置於透光防滲層33上。其中，遮光膜％係具有複數 開口 36!，而該等開口 361係分別對應於導光板31之複數 微結構M，而微結構μ增加光線射出的比例，而遮光膜 36則能減少該等開口 361之間的漏光現象。 請參照圖5人至5D所示，其為本發明較佳實施例之又 一變化態樣的分解示意圖，其中，破孔〇及微結構Μ # 令略沒有”。在本實施财，與前述實_背光模組3 it要m為’遮光臈46可為—可撓性騎，而遮光 Γ/^ 板41之尺寸，其中，遮光膜46具 有-遽先4 462，且遮光部462係覆蓋導光板4ι之側面 201248263 413，以減少導光板41側面413的漏光。 請參照圖5A所示，本實施例中，遮光膜46係具有一 對應於導光板41複數側面413的遮光部462，當遮光膜 46由底面412往上包覆住導光板41之底面412以及複數 側面413時，遮光部462對應該等側面413設置。當然， 遮光膜46可將反射片44 一併包覆，本實施例以遮光膜46 將反射>1 44 一併包覆為例。另外，可將反射片44與遮光 膜46黏合固定。遮光部462係以遮蔽住導光板41之複數 側面413為例，需注意的是，只要遮光膜46有遮蔽住至 少一側面413，即可有助於減少背光模組4的漏光現象。 請參照圖5B所示，本實施例中，其與圖5A實施例之 背光模組4大致相同的結構。而不同之處在於，本實施例 中之遮光膜46係由導光板41的出光面411往下來包覆導 光板41之出光面411及至少一側面413。另外，也可合併 圖5A和圖5B之實施態樣，遮光膜46完全包覆住導光板 41之底面412，此變化態樣將詳細說明於後。當然，遮光 膜46可一併包覆透光防滲層43，本實施例以遮光膜46 — 併包覆透光防滲層43為例。同樣地，為了固定遮光膜46， 可更彎折遮光膜46並包覆住部分底面412或部分反射片 44，再進行固定。 需特別說明的是，於本實施例中，包覆住出光面411 的遮光膜46係具有一透光部463，透光部463係對應出光 面411設置，其可具有幾乎與出光面411相等、或略小、 或略大的面積，因而使遮光膜46包覆整個出光面411的 10 201248263 同時，光線仍可由出光面411透出。 請參照圖5C所示，本實施例中，其與圖5B實施例之 背光模組4大致相同的結構。而主要不同之處在於，將遮 光膜46沿折線L對折後，接著將導光板41、發光單元42 或者是將導光板4卜發光單元42及反射片44 一併包覆於 遮光膜46内。 請參照圖5D所示’本實施例中，其與圖5A至圖5C 實施例之背光模組4大致相同的結構。而主要不同之處在 於，遮光膜40包含一第一遮光膜464及一第二遮光膜 465。當然，在其他實施例中，遮光膜46可包含三個以上 之膜材，於此係以遮光膜46包含兩膜材464、465為例。 於此，第一遮光膜464鄰設於透光防滲層43，第二遮光膜 465鄰設於反射片44,且第一遮光膜464與第二遮光膜465 可藉由一黏著物質而連結’當然第一遮光膜464可設置 於透光防滲層43與導光板41之間或第二遮光膜465可設 置於反射片44與導光板41之間，在本實施例中以第一遮 光膜464鄰設於透光防滲層43 ’第二遮光膜465鄰設於反 射片44為例。 請參照圖6所示’其為本發明較佳實施例之再一種背 光模組5的分解示意圖。在本實施例中，與前述實施例背 光模組3之主要不同處為’透光防滲層53可利用印刷或 是塗佈技術’將原來的透明層形成複數透光部531與複數 遮光部532，複數透光部531係對應導光板51之複數微結 構M。本實施例係將遮光層直接圖案化於透光防滲層53 201248263 上，使得透光防滲層53兼具遮光膜及防滲層的功效。如 此一來，可不需再另設一遮光膜，不但可節省材料成本， 還可有利於背光模組的薄型化。 睛參照圖7所示，圖7為本發明較佳實施例之一種鍵 盤ό之分解示意圖。在本實施例中’鍵盤6包含一導光板 61、至少一發光單元62、一透光防滲層63以及一鍵盤模 組67。其中，鍵盤6中的導光板61、發光單元62以及透 光防滲層63，即組合了前述實施例中的背光模組，其元件 的技術特徵與連結關係於前面實施例中已有詳述，於此不 再贅述。 在本實施例中，鍵盤模組67係設置於透光防滲層63 上’鍵盤模組67例如包含複數鍵帽671及一導電膜672。 鍵帽671設置於導電膜672上，藉由導電膜672可傳送被 按壓之鍵帽671的訊號。藉由透光防滲層63的設置，即 使使用者不小心灑落的液體由鍵盤模組67之鍵帽671的 側邊滲入時，也不會直接與發光單元62接觸，故也不會 損壞而影響發光單元62的出光。另外，鍵盤6更可包含 一底板68，背光模組係容置於鍵帽671與底板68之間。Affect the quality of light. As shown in FIG. 3A and FIG. 3B, it is a cross-sectional view of a further brewing module 2 according to a preferred embodiment of the present invention. In this embodiment, the backlight module 2 further includes a light intensity adjustment pattern 25 disposed on the lower surface of the light-transmitting barrier layer 23 and disposed corresponding to each of the light-emitting units 22. By setting the light intensity adjustment pattern 25, the excessive light at the light-emitting unit 22 can be reduced to avoid the local light generated at the position corresponding to the light-emitting unit 22, and the overall brightness of the backlight module 2 is more uniform. As shown in FIG. 3A, the light intensity adjustment pattern 25 is disposed on the surface of the light guide plate 21, for example, close to the surface of the light guide plate 21, and may be disposed on the surface of the light transmission barrier layer 23 away from the light guide plate 21, and The present invention is exemplified by a surface provided on the surface of the light-transmitting barrier layer 23 close to the light guide plate 21. The light intensity adjustment pattern 25 is provided partially at the light-transmitting barrier layer 23 at the corresponding light-emitting unit 22, and the light intensity adjustment pattern 25 is disposed around the periphery of the light-emitting unit 22. In the present embodiment, the light intensity adjustment pattern 25 may be a white reverse ~ 201248263 shot pattern. In this way, light directly from the light-emitting unit 22 can be reflected back into the light guide plate 21 to improve the efficiency of use of the light. Of course, the light intensity adjustment pattern 25 may also be an opaque pattern, so that light directly from the light-emitting unit 22 can be absorbed, and excessive light emission can be reduced to prevent uneven brightness of the entire keyboard. Referring to FIG. 3B, in the embodiment, the force intensity adjustment pattern 5 can be disposed over the light-emitting unit 22 to provide a better light intensity adjustment effect, that is, direct light reflection can be performed. Returning to the first board 21 to enhance the light? The rate 2: j also prevents the light from the light-emitting unit 22 from being directly emitted, and the local light generated at the position corresponding to the light-emitting unit 22 is too low. ...refer to the description of Fig. 4, which is a schematic exploded view of still another backlight module 3 of the present invention. In the present embodiment, the main difference from the foregoing embodiment is that the 'back money group 3 may include the light-shielding film %, and the light-shielding film 36 is disposed on the light-transmitting barrier layer 33. Wherein, the light shielding film % has a plurality of openings 36, and the openings 361 correspond to the plurality of microstructures M of the light guide plate 31, respectively, and the microstructure μ increases the proportion of light emitted, and the light shielding film 36 can reduce the openings. Light leakage between 361. 5 to 5D, which is an exploded perspective view of still another variation of the preferred embodiment of the present invention, wherein the broken hole and the microstructure Μ# are slightly omitted. The backlight module 3 it is required to be 'the shading 46 can be a flexible ride, and the size of the shading plate ^ 41, wherein the light shielding film 46 has a first 4 462, and the light shielding portion 462 is covered. The light guide plate 46 has a side surface of the light guide plate 41. The light shielding film 46 has a light shielding portion 462 corresponding to the plurality of side surfaces 413 of the light guide plate 41. When the light shielding film 46 covers the bottom surface 412 and the plurality of side surfaces 413 of the light guide plate 41 from the bottom surface 412, the light shielding portion 462 is disposed corresponding to the side surface 413. Of course, the light shielding film 46 can cover the reflection sheet 44 together. For example, the reflection film 44 is coated with the light-shielding film 46. The reflection sheet 44 and the light-shielding film 46 may be adhered and fixed. The light-shielding portion 462 is exemplified by shielding the plurality of side surfaces 413 of the light guide plate 41. Note that as long as the light shielding film 46 has at least one side surface 413, there is The light leakage phenomenon of the backlight module 4 is reduced. Referring to FIG. 5B, in this embodiment, the backlight module 4 of the embodiment of FIG. 5A has substantially the same structure. The difference is that the light shielding in this embodiment is The film 46 is covered by the light-emitting surface 411 of the light guide plate 41 to cover the light-emitting surface 411 of the light guide plate 41 and at least one side surface 413. Alternatively, the embodiment of FIGS. 5A and 5B may be combined, and the light-shielding film 46 is completely covered. The bottom surface 412 of the light guide plate 41, this variation will be described in detail later. Of course, the light shielding film 46 can be coated with the light transmissive barrier layer 43, and the light shielding film 46 is coated with the light shielding layer. 43. Similarly, in order to fix the light shielding film 46, the light shielding film 46 may be further bent and covered with a part of the bottom surface 412 or a partial reflection sheet 44, and then fixed. Specifically, in this embodiment, the package The light shielding film 46 covering the light exit surface 411 has a light transmitting portion 463, and the light transmitting portion 463 is disposed corresponding to the light emitting surface 411, and may have an area almost equal to, or slightly smaller than, or slightly larger than the light emitting surface 411, thereby The light shielding film 46 covers the entire light emitting surface 411 10 201248263 at the same time, the light The light-emitting surface 411 can be seen through the light-emitting surface 411. Referring to Fig. 5C, in the present embodiment, it has substantially the same structure as the backlight module 4 of the embodiment of Fig. 5B. The main difference is that the light-shielding film 46 is folded along the fold line L. Then, the light guide plate 41, the light-emitting unit 42 or the light-guide plate 4 and the light-reflecting sheet 42 are collectively covered in the light-shielding film 46. Referring to FIG. 5D, in the present embodiment, 5A to 5C The backlight module 4 of the embodiment has substantially the same structure, and the main difference is that the light shielding film 40 includes a first light shielding film 464 and a second light shielding film 465. Of course, in other embodiments, the light shielding film 46 may include three or more film materials, and the light shielding film 46 includes two film materials 464 and 465 as an example. The first light-shielding film 464 is adjacent to the light-transmitting barrier layer 43 , and the second light-shielding film 465 is adjacent to the reflective sheet 44 , and the first light-shielding film 464 and the second light-shielding film 465 can be connected by an adhesive substance. 'Of course, the first light-shielding film 464 may be disposed between the light-transmitting barrier layer 43 and the light guide plate 41 or the second light-shielding film 465 may be disposed between the reflective sheet 44 and the light guide plate 41. The film 464 is disposed adjacent to the light-transmitting and impermeable layer 43 ′. The second light-shielding film 465 is adjacent to the reflective sheet 44 as an example. Please refer to FIG. 6 for an exploded view of a further backlight module 5 according to a preferred embodiment of the present invention. In this embodiment, the main difference from the backlight module 3 of the foregoing embodiment is that the transparent transparent layer 53 can form a plurality of transparent portions 531 and a plurality of light shielding portions by using a printing or coating technique. 532. The plurality of light transmitting portions 531 correspond to the plurality of microstructures M of the light guide plate 51. In this embodiment, the light shielding layer is directly patterned on the transparent anti-seepage layer 53 201248263, so that the light-transmitting anti-seepage layer 53 has the functions of the light-shielding film and the anti-seepage layer. As a result, there is no need to provide another light shielding film, which not only saves material cost, but also contributes to thinning of the backlight module. Referring to Figure 7, Figure 7 is an exploded perspective view of a keyboard cartridge in accordance with a preferred embodiment of the present invention. In the present embodiment, the keyboard 6 includes a light guide plate 61, at least one light emitting unit 62, a light transmissive barrier layer 63, and a keyboard module 67. The light guide plate 61, the light-emitting unit 62, and the light-transmitting and impermeable layer 63 in the keyboard 6 are combined with the backlight module in the foregoing embodiment, and the technical features and connection relationships of the components are as detailed in the previous embodiment. This will not be repeated here. In the present embodiment, the keyboard module 67 is disposed on the transparent barrier layer 63. The keyboard module 67 includes, for example, a plurality of keycaps 671 and a conductive film 672. The key cap 671 is disposed on the conductive film 672, and the signal of the pressed key cap 671 can be transmitted through the conductive film 672. By the arrangement of the transparent anti-seepage layer 63, even if the liquid that the user accidentally spills penetrates from the side of the key cap 671 of the keyboard module 67, it does not directly contact the light-emitting unit 62, so it is not damaged. The light emitted from the light emitting unit 62 is affected. In addition, the keyboard 6 further includes a bottom plate 68, and the backlight module is disposed between the keycap 671 and the bottom plate 68.
综上所述，本發明之背光模組及鍵盤係將透光防滲層 設置於導光板上，藉此可避免液體滲入發光單元内’進而 達到保護發光單元之功效，也維持了發光品質。此外，在 本發明之一實施例中，透光防滲層包含至少一破孔’而黏 著物質設置於破孔周圍，破孔可讓背光模組進行組裝，而 黏著物質設置於破孔周圍可阻擋液體從破孔滲入。 S 12 201248263 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1為本發明較佳實施例之一種背光模組的分解示意 圖； 圖2為本發明較佳實施例之另一種背光模組的分解示 意圖； 圖3A及圖3B為本發明較佳實施例之再一種背光模組 的剖面示意圖； . 圖4為本發明較佳實施例之再一種背光模組的分解示 意圖， 圖5A及圖5D為本發明較佳實施例之再一種背光模組 的分解示意圖； 圖6為本發明較佳實施例之再一種背光模組的分解示 意圖；以及 圖7為本發明較佳實施例之一種鍵盤之分解示意圖。。 【主要元件符號說明】 I、 2、3、4、5 :背光模組 II、 21、31、41、51、61 :導光板 11卜 211、31卜 411、511、611 :出光面 112、212、312、412、512、612 :底面 13 201248263 113、213、313、413、513、613 :側面 12 ' 22 ' 32 ' 42、52、62 :發光單元 13、 23、33、43、53、63 :透光防滲層 14、 24、34、44、54、64 :反射片 25 :光強度調整圖案 36、46、56、66 :遮光膜 361 :開口 462、 531 :遮光部 463、 532 :透光部 464 :第一遮光膜 465 :第二遮光膜 6 :鍵盤 67 :鍵盤模組 671 :鍵帽 672 :導電膜 Ο :破孔 Μ :微結構 L :折線 14In summary, the backlight module and the keyboard of the present invention are provided with a light-transmitting and impermeable layer on the light guide plate, thereby preventing liquid from penetrating into the light-emitting unit, thereby achieving the effect of protecting the light-emitting unit and maintaining the light-emitting quality. In addition, in an embodiment of the invention, the transparent anti-seepage layer comprises at least one broken hole and the adhesive substance is disposed around the broken hole, and the broken hole allows the backlight module to be assembled, and the adhesive substance is disposed around the broken hole. Blocking liquid from penetrating through the hole. S 12 201248263 The above description is for illustrative purposes only and not as a limitation. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a backlight module according to a preferred embodiment of the present invention; FIG. 2 is an exploded perspective view of another backlight module according to a preferred embodiment of the present invention; FIG. 3A and FIG. FIG. 4 is an exploded perspective view of still another backlight module according to a preferred embodiment of the present invention. FIGS. 5A and 5D are still another preferred embodiment of the present invention. FIG. 6 is an exploded perspective view of a backlight module according to a preferred embodiment of the present invention; and FIG. 7 is an exploded perspective view of a keyboard according to a preferred embodiment of the present invention. . [Main component symbol description] I, 2, 3, 4, 5: backlight module II, 21, 31, 41, 51, 61: light guide plate 11 211, 31 411, 511, 611: light-emitting surface 112, 212 312, 412, 512, 612: bottom surface 13 201248263 113, 213, 313, 413, 513, 613: side 12 ' 22 ' 32 ' 42, 52, 62: light-emitting units 13, 23, 33, 43, 53, 63 : light-transmitting barrier layer 14, 24, 34, 44, 54, 64: reflection sheet 25: light intensity adjustment patterns 36, 46, 56, 66: light-shielding film 361: openings 462, 531: light-shielding portions 463, 532: Light portion 464: first light shielding film 465: second light shielding film 6: keyboard 67: keyboard module 671: key cap 672: conductive film Ο: broken hole Μ: microstructure L: broken line 14
II