五、新型說明： 【新型所屬之技術領域】 本創作係關於一種背光模組以及發光鍵盤，並且特別 地，本創作係關於一種能增加封裝可靠度以及降低發光二 極體數量之背光模組與發光鍵盤。 一 【先前技術】 近年來，由於資訊產業發展迅速，許多使用者可能在 不同環境下使用攜帶型資訊裝置，例如筆記型電腦或個人 數位助理等。在光線較弱的環境，例如投影機簡報場合， 使用者可能看不清楚鍵盤按鍵上所標示的數字以及文字， 造成作業困難。 請參閱圖一 ’圖一係繪示先前技術之發光鍵盤1的剖 面圖。如圖一所示，發光鍵盤1具有鍵盤模組1〇以及背光 模組12 ’其中鍵盤模組1〇可設置於背光模組12之上。背 光模組12具有發光源120設置於導光板122中，發光源 120可電連接印刷電路板(未緣示於圖中）並由印刷電路板 控制而發出光線入射導光板122。光線於導光板122中行 進’並被導光板122反射而可於導光板122中傳遞。導光 板122之一面可增設反射元件1220以反射光線，使光線能 穿出導光板122而朝向鍵盤模組10前進藉以讓使用者觀察 到光線。 . 圖一所用的發光源120是側光式的，亦即，作為發光 二極體的發光源120設置於導光板122之側面並自其侧面 入射先線。 一然而，側光式的發光源在發光二極體數量上的需求 向’亦即’侧光式的發光源的製造成本較高。 而父 【新型内容】V. New description: [New technical field] The present invention relates to a backlight module and an illuminated keyboard, and in particular, the present invention relates to a backlight module capable of increasing package reliability and reducing the number of light-emitting diodes. Illuminated keyboard. A [Prior Art] In recent years, due to the rapid development of the information industry, many users may use portable information devices such as notebook computers or personal digital assistants in different environments. In low-light environments, such as projector briefings, the user may not be able to see the numbers and text marked on the keyboard keys, making the operation difficult. Referring to Figure 1, there is shown a cross-sectional view of a prior art illuminated keyboard 1. As shown in FIG. 1 , the illuminated keyboard 1 has a keyboard module 1 〇 and a backlight module 12 ′ , wherein the keyboard module 1 〇 can be disposed on the backlight module 12 . The backlight module 12 has a light source 120 disposed in the light guide plate 122. The light source 120 can be electrically connected to the printed circuit board (not shown) and controlled by the printed circuit board to emit light into the light guide plate 122. The light is conducted in the light guide plate 122 and reflected by the light guide plate 122 to be transmitted in the light guide plate 122. A reflective element 1220 can be added to one side of the light guide plate 122 to reflect the light, so that the light can pass through the light guide plate 122 and advance toward the keyboard module 10 to allow the user to observe the light. The illumination source 120 used in Fig. 1 is of the side-light type, that is, the illumination source 120 as the light-emitting diode is disposed on the side of the light guide plate 122 and incident on the front line from the side surface thereof. However, the demand for the number of light-emitting diodes of the edge-light source is higher in the manufacturing cost of the 'sidelight' type of light source. Father [new content]
因此’本創作之—範噜在於提供—種上打式或下 =先模組，相對於側光式光源，上打式背光模組或^ ^月光模組可用較少的發光二極體來達到相同‘ 根據一具體實施例，本創作之背光模組包 及發光二極體。導光板具有第—面以及相對 一、弟-面4二面’印刷電路板則具有第三面以及相對於 :面之第四面’其中印刷電路板之第三面面對導之Therefore, 'the creation of the fan- 噜 噜 噜 噜 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 先 先Achieving the same ' According to a specific embodiment, the backlight module package and the light emitting diode of the present invention. The light guide plate has a first surface and a opposite side, and the second side of the printed circuit board has a third side and a fourth side opposite to the surface: wherein the third side of the printed circuit board faces the guide
—面，並且第二面上設置反射層。發光二極體A 刷電路板之上以電性連接其上之線路，發 17a face, and a reflective layer is provided on the second side. Light-emitting diode A is electrically connected to the circuit board above the circuit board.
光線至導祕。 科-極體可發射 藉由印刷電路板之第三面上的反射層，可幫 S反射，因此’發光二極體所發射之光線可於導光:: 其具有新Light to guide. The body-electrode can emit light by the reflective layer on the third side of the printed circuit board, so the light emitted by the light-emitting diode can be guided by light:
、本創作之另一範_在於提供一種發光鍵盤 式的背光模組，可解決先前技術之問題。I 、根據-具體實施例’本創作之發光鍵盤包含 =及鍵盤模組。背光模組進—步包含導光板 路板 以及發光二極體。導光板具有第一面以及相對:第〗= 5 〜面，印刷電路板則具有第三面以及相對於第三面之第四 ，丄其中印刷電路板之第三面面對導光板之第二面，並且 第一面上設置反射層。發光二極體係設置於印刷電路板之 上以電性連接其上之線路，發光二極體可發射光線至導光 板。鏈盤模組係設置於背光模組上。 藉由印刷電路板之第三面上的反射層以及鍵盤模組之 鐵板結構’可幫助導光板進行反射，因此，發光二極體所 發射之光線可於導光板中行進。 本創作之另一範缚在於提供一種新式的背光模組，可 解決先前技術之問題。 根據一具體實體例，本創作之背光模組包含印刷電路 板、反射板、導光板、發光二極體以及遮罩。反射板對應 印刷電路板之第一面而設置，並且反射板具有第二面面對 印刷電路板之第一面，此外，反射板具有相對第二面之反 射，以及第一孔洞。導光板係鄰近反射板之反射面，其具 有第三面面對反射板之反射面以及相對於第三面之地ς 面。發光二極體係設置於印刷電路板上並與印刷電路板上 t線路電性連接，其係用以發射光線至反射板之第二面並 穿透第一孔洞而到達導光板之第三面。遮罩係鄰近導光板 之第四面，其係用以部分反射自導光板第四面所射出之光 線。 藉由該反射板之反射面可幫助導光板進行反射，因 此，發光一極體所發射之光線可於導光板中行進。 本創作之另一範疇在於提供—種新式的背光模組， 解決先前技術之問題。 根據一具體實施例，士石 _ 板、導光板、反射板、‘創^月光她包含印刷電路 具第-面以及相對體=。印刷電路板 刷電路板之第-面$置1 “導光板係相對於印 之第四面，其中第;面传面3第:面面 ?’並且其具有反射面面:工:第::板::近： :設置於印刷電路板上，可用以發射光線至導光 笛遮罩接近印刷電路板n以部姐 板第二面所射出光線。 IW电硌 藉由反射板之反射面可幫助導光板進行反射，因此， 發光-極體所發射之光線可於導光板中行進。 關於本創作之優點與精神可以藉由以下的創作詳述及 所附圖式得到進一步的瞭解。 【實施方式】 ^印參閱圖二A，圖二A係繪示根據本創作之一具體實 加例之發光鍵盤2的示意圖。如圖二A所示，發光鍵盤2 =含背光模組20以及鍵盤模組22，其中，鍵盤模組22係 :又置於月光模組2〇之上’背光模組2〇所發出之光線可通 過鍵盤模組22而讓使用者能觀察到光線。圖二a所示之 背光模組20可視為上打式背光模組。 於本具體實施例中，背光模組2〇可包含導光板2〇〇、 (7尿I龟路板2〇2以及發光二極體204。導光板具有互相相 對之第面2〇〇〇以及第二面2002，印刷電路板202則具 有互相相對之第三面2020以及第四面2〇22。第三面2〇2〇 面對導光板200之第二面2002,並且其上設置反射層2024 以反射由導光板200所射出之光線。於實務中，反射層可 為，但不受限於’白漆、金屬薄膜、鍍铭或高分子。發光 二極體204係設置於印刷電路板202之第三面2020上，並 與印刷電路板202之線路(未繪示於圖式中）電性連接，發 光二極體204可被印刷電路板202控制而發射光線至導光 板200。请注思，本具體實施例中僅、繪示出一個發光二極 體，然而於實務中，發光二極體設置之數量可根據使用者 或設計者需求而定’並不受限於本具體實施例。 由於本具體實施例之發光二極體204設置於印刷電路 板202之第三面2020上，因此，導光板2〇〇可包含一凹陷 部2004，其位置對應發光二極體2〇4之位置。當背光模組 20組裝時，導光板2〇〇可設置於印刷電路板2〇2上，發光 二極體204則部分容納於凹陷部2〇〇4之中，如圖二b所 不，圖二B係繪示根據圖二八之背光模組2〇的示意圖。 請再參閱圖二A，背光模組20可進一步包含遮罩206 设置於導光板2〇〇以及鍵盤模組22之間。遮罩2〇6於實務 中"T 刀反射自導光板2〇〇之第一面2〇〇〇所射出之光線。 遮罩206具有一透光區2060讓光線通過。透光區2〇6〇可 使用透明材f或破孔方式讓光線穿透，例如，圖二A之透 光區2060係以透明材質製成，圖二B之透光區2060則為 一破孔。 U於本具體實施例中，發光二極體204可朝導光板200 于光線光線係於導光板200中行進並到達導光板之第 一面 2000，甘 a 再中，部分光線被反射並且部分光線穿透第一 M395202 面2000。穿透第一面2000之光線會到達遮罩206，遮罩 206則於透光區2060讓光線穿透至鍵盤模纟且22並且於其 他位置將光線吸收或反射。請注意，於實務中，此遮罩亦 可省略而藉由鍵盤模組之鐵板結構完成上述遮罩之功能。 被導光板200之第一面2000反射或被遮罩206反射之 光線會在導光板200中朝向印刷電路板202前進。當光線 到達導光板200之第二面2002或印刷電路板202之反射層 2024時’光線會再度被反射而朝向鍵盤模組η前進。 藉由上述結構’發光二極體可設置於導光板之正面， 並且於導光板中以反射之方式行進。相較於先前技術於導 光板側面設置發光源之方法，本具體實施例之背光模組其 發光源所發出之光線同樣容易被反射而可於導光板中傳 遞’並且其具有更高的封裝可靠度以及更低的生產成本。 於本具體實施例中’鍵盤模組22可包含基板220以及 設置於基板220上之鍵帽222，其中，基板220具有破孔 2200並且鍵帽222具有透光區2220。發光二極體204所發 出之光線穿過導光板200以及遮罩206後可到達基板 220，並且可經由破孔2200照射鍵帽222之透光區2220， 進一步可讓位於鍵帽222上方之使用者觀察到光線。請注 意’基板之透光設計並不限制於破孔，而是根據使用者或 設計者需求而定。舉例而言’於另一具體實施例，基板可 以透明材質構成而為透明基板，並且自導光板所發出的光 線可穿過此透明基板而照射鍵帽之透光區。 本具體實施例之發光二極體204係設置於印刷電路板 202之第三面2020上’因此背光模組2〇組裝時導光板200 9 M395202 j設置凹陷部2004以部分容納發光二極體綱。缺而， 發先-極體(發細)之㈣並不受崎本频實施例。 請參閱圖三，圖三係繪示根據本創 例之發光鍵盤3的示意圖，如圖三所示，與上述 例不同處’在於本具體實施例之背光模組3G之印刷電ς板 302可包含孔洞3026。發光二極體3G4係設置於印刷電路 板302之第四面3022上並對應孔洞3〇26之位置。本具體 實施例之發光二極體304之出光面係面對孔洞搬6，因此 所發射之光線會穿過孔洞3026而到達導光板3〇〇。本具體 實施=之發光鍵盤3之其他單元係與上述具體實施例之相 對應單元大體上相同’故於此不再贅述。由於發光二極體 304設置於印刷電路板之第四面3〇22上，因此導光板3〇〇 並不需另外設置凹陷部以容納發光二極體3〇4。此外，遮 罩306具有一透光區3060讓光線通過。同樣地，實務中透 光區3060可使用破孔或透明材質方式讓光線通過，於本具 體實施例中透光區3060係一破孔。 請參閱圖四，圖四係缘示根據本創作之另一具體實施-鲁 之發光鍵盤4的示意圖。如圖四所示，發光鍵盤4之背光 -模組40包含導光板400、印刷電路板402以及發光二極體 404。本具體實施例之背光模組40之各單元係與上述具體 實施例之相對應單元大體上相同，故於此不再贅述。背光 模組40進一步包含反射板406鄰近導光板400之第一面 4000 ’並且’鍵盤模組42係位於印刷電路板402之第四面 4022之上。圖四所示之背光模組40可視為下打式背光模 10 M395202 I · · 於本具體實施例中，發光二極體404與印刷電路板402 電性連接，且發光二極體404可容納於導光板400之凹陷 部4004，發光二極體404所發出之光線入射導光板4〇〇， 當光線於導光板400中行進至導光板400之第一面4000 時，部分光線會被反射並且部分光線穿透導光板4〇〇，接 著’穿透出導光板400之光線會再被反射板406所反射而 回到導光板4〇〇。請注意，於實務中，反射板亦可直接設 置於導光板之第一面上而直接反射大部分光線，因此光線 φ 不需再穿出導光板而行進至反射板。 被反射板406所反射之光線於導光板4〇〇中朝向印刷 電路板402行進，並且再被導光板4〇〇之第二面4〇〇2或反 射層4024所反射，故光線可於導光板4〇〇中傳遞。此外， 反射層4024具有一透光區4〇24〇讓光線通過。透光區 40240可使用破孔或透明材質方式讓光線通過。印刷電路 板402上可分別設置第一孔洞4〇28對應透光區4〇24〇，致 使光線能藉由第一孔洞4 〇 2 8穿透印刷電路板4 〇 2而到達鍵 • 盤模組4〇。請注意，於實務中，印刷電路板亦可以透明材 - 質所構成而為一透明印刷電路板，故不需另外設置第一孔 洞供光線通過。 同樣地，發光一極體於另一具體實施例中亦可設置於 印刷電路板之第四面並對應印刷電路板上之第二孔洞。發 光二極體所發出之光線穿過第二孔洞到達導光板，並且^ 線被導光板之第—面或反射板反射後再朝向印刷電路板扞 進’之後可被導光板之第二面或反射層所反射。於一特定 位置’反射層可讓光線通過，並且印刷電路板對應此特定 11 M395202 位置可設置第一孔洞以供光線穿透。此外，印刷電路板可 以透明材質所構成而為透明印刷電路板，故不需另外設置 第一孔洞以及第二孔洞供光線通過。 與上述具體實施例相同，本具體實施例之發光二極體 404所發出之光線穿透印刷電路板202而到達並穿過鍵盤 模組42 ’使用者則可透過鍵帽422之透光區4220觀察到 光線。 上述印刷電路板上設置反射層幫助光線於導光板中反 射之結構，亦可以反射板代替反射層。請參閱圖五，圖五鲁 係繪不根據本創作之另一具體實施例之背光模組的示 意圖。如圖五所示，背光模組5〇包含印刷電路板5〇〇、反 射板5〇2、導光板5〇4、發光二極體5〇6以及遮罩508。印 刷電路板500具有第一面5〇〇〇，反射板502則對應第一面 5000而設置’並且其具有第二面5020面對印刷電路板5〇〇 之第一面5000、反射面R1以及第一孔洞5〇22。導光板5〇4 鄰近反射板502，其具有第三面5040面對反射板502之反 射面R1以及第四面5042。遮罩508係鄰近於導光板504 '· 之第四面5042。發光二極體506可設置於印刷電路板500 ' 之第一面5000上並與其上之線路電性連接。發光二極體 506與印刷電路板500電性連接，且發光二極體506可容 納於導光板504之凹陷部5044中。 發光二極體506所發出之光線可穿過反射板502之第 一孔洞5022並到達導光板504之第三面5040，接著，光 線可被第三面5040、第四面5042或遮罩508所反射而朝 向反射板502行進。反射板502之反射面ri將第三面 12 M395202 5040、第四面5042或遮罩508所反射之光線再反射 朝向遮罩508行進。於實務中，遮罩508具有—透光區5呢〇 可讓光線通過，致使光線可到達鍵盤模組。同樣地，實務 中透光區5_可_透日質或破孔方式讓光線通過^於 本具體實施例中透光區5080係以透明材質製成。 同樣地，本具體實施例發光二極體於實務中亦可設置 於印刷電路板之相對於第一面之第五面上，其發出之=線 則可穿過設置於印刷電路板之第二孔洞或是本身為透明材 質之印刷電路板而抵達反射板。 凊參閱圖六，圖六係緣示根據本創作之另一具體實施 例之背光模組60的示意圖。如圖六所示，背光模組6〇包 含印刷電路板600、反射板602、導光板6〇4、發光二極體 606以及遮罩608。印刷電路板600具有第一面6〇〇〇以及 第二面6002 ’導光板604具有第三面6040面對印刷電路 板600之第一面6000，以及相對於第三面6〇4〇之第四面 6042。反射板602鄰近導光板604並且其反射面R2面對 導光板604之第四面6042。遮罩608係鄰近於印刷電路板 600之第二面6002。發光二極體606可設置於印刷電路板 600之第一面6000上並與其上之線路電性連接。發光二極 體606與印刷電路板600電性連接，且發光二極體606可 谷納於導光板604之凹陷部6044中。 發光二極體606所發出之光線可穿過導光板604並被 導光板604之第三面6〇4〇、第四面6042以及反射板602 之反射面R2所反射。於本具體實施例中，印刷電路板6〇〇 係一透明印刷電路板’因此，被反射之光線可再經由導光 13 M395202 板604之第三面6040以及遮罩6〇8所反射。藉由反射板 602以及遮罩608，光線可產生反射而於導光板中行 進此外，於貝務中，遮罩608具有一透光區6080可讓光 線通過，致使光線可到達鍵盤模組。同樣地，透光區 可採用翻材質或破孔方式讓光_過， 中透光區6_係以透明材質製成。 Λ也例 ，上所述，本創作之背光模組可藉由反射板或於其印 =板上設置之反射層幫助光線反射，因此，本創作之 ^拉組結構可於導歧之正面設置發顧、。相較於 =值Ϊ創作之f光模組除了具有容·反射而可於㈣ ==成:光式的發光源具有更高的縣可靠 藉由以上較佳具體實施例之詳， 述本創作之特徵與精神，而並非以上清楚描 實施例來對本創作之範，加以限制。相反較佳具體 相等性的安排於本創作； '· 專利粑圍的崎内。因此，本創作&欲申靖之 _應絲據上獅朗作最寬廣的％利範圍的範 有可能的改變以及具相等性的安排。 乂致使其涵蓋所 14 M395202 【圖式簡單說明】 圖一係繪示先前技術之發光鍵盤的剖面圖。 圖二A係繪示根據本創作之一具體實施例之發光鍵盤 的示意圖。 圖二B係繪示根據圖二A之背光模組的示意圖。 圖三係繪示根據本創作之另一具體實施例之發光鍵盤 的示意圖。 圖四係繪示根據本創作之另一具體實施之發光鍵盤的 示意圖。 圖五係繪示根據本創作之另一具體實施例之背光模組 的示意圖。 圖六係繪示根據本創作之另一具體實施例之背光模組 的示意圖。 【主要元件符號說明】 10 :鍵盤模組 120 :發光源 1220 :反射元件 1 :發光鍵盤 12 :背光模組 122 :導光板 2、3、4 :發光鍵盤 20、30、40、50、60 :背光模組 15 M395202 22、32、42 :鍵盤模組 200、300、400、504、604 :導光板 202、302、402、500、600 :印刷電路板 2〇4、304、404、506、606 :發光二極體 206、306、406、508、608 :遮罩 2000、3000、4000、5000、6000 :第一面 2002、3002、4002、5020、6002 :第二面 2020、3020、4020、5040、6040 :第三面 2022、3022、4022、5042、6042 :第四面 2024、3024、4024 :反射層 2004、4004、5044、6044 :凹陷部 220、320、420 :基板 222、322、422 :鍵帽 2200、3200、4200 :破孔 2220、3220、4220 :透光區 3026 :孔洞 4028、5022 :第一孔洞 406、502、602 :反射板 Rl、R2 :反射面 16 M395202 2060、3060、40240、5080、6080 :透光區 17Another example of the present invention is to provide an illuminated keyboard type backlight module that solves the problems of the prior art. I. According to the specific embodiment, the illuminated keyboard of the present invention comprises a & keyboard module. The backlight module further includes a light guide plate and a light emitting diode. The light guide plate has a first surface and an opposite: 〖=5 〜 face, the printed circuit board has a third surface and a fourth surface opposite to the third surface, wherein the third side of the printed circuit board faces the second light guide plate The face is provided with a reflective layer on the first side. The light emitting diode system is disposed on the printed circuit board to electrically connect the wires thereon, and the light emitting diode emits light to the light guide plate. The chain module is disposed on the backlight module. The light guide plate can be reflected by the reflective layer on the third side of the printed circuit board and the iron plate structure of the keyboard module. Therefore, the light emitted by the light emitting diode can travel in the light guide plate. Another stipulation of this creation is to provide a new type of backlight module that solves the problems of the prior art. According to a specific example, the backlight module of the present invention comprises a printed circuit board, a reflector, a light guide plate, a light emitting diode, and a mask. The reflector is disposed corresponding to the first side of the printed circuit board, and the reflector has a second side facing the first side of the printed circuit board. Further, the reflector has a reflection opposite the second side, and the first aperture. The light guide plate is adjacent to the reflecting surface of the reflecting plate, and has a reflecting surface of the third surface facing the reflecting plate and a surface facing the third surface. The light-emitting diode system is disposed on the printed circuit board and electrically connected to the t-line of the printed circuit board for emitting light to the second surface of the reflective plate and penetrating through the first hole to reach the third surface of the light guide plate. The mask is adjacent to the fourth side of the light guide plate for partially reflecting the light emitted from the fourth side of the light guide plate. The reflecting surface of the reflecting plate can help the light guide plate to reflect, so that the light emitted by the light emitting body can travel in the light guide plate. Another area of the creation is to provide a new type of backlight module that solves the problems of the prior art. According to a specific embodiment, the stone plate, the light guide plate, the reflector plate, and the </ br> </ br> comprise the printed circuit with the first side and the opposite body. The first surface of the printed circuit board brush circuit board is set to 1 "the light guide plate is opposite to the fourth side of the printing, wherein the first; the surface transmission surface 3: face?" and it has a reflective surface: work:::: :: Near: : Set on the printed circuit board, it can be used to emit light to the light guide flute mask to approach the printed circuit board n to emit light on the second side of the board. IW power can help by the reflective surface of the reflector The light guide plate is reflected, so that the light emitted by the light-emitting body can travel in the light guide plate. The advantages and spirit of the present invention can be further understood by the following detailed description and the drawings. Fig. 2A shows a schematic diagram of an illuminated keyboard 2 according to one embodiment of the present invention. As shown in Fig. 2A, the illuminated keyboard 2 includes a backlight module 20 and a keyboard module. 22, wherein the keyboard module 22 is placed on the moonlight module 2 '. The light emitted by the backlight module 2 可 can be used by the keyboard module 22 to allow the user to observe the light. The backlight module 20 can be regarded as a top-mounted backlight module. In this embodiment, The light module 2〇 may include a light guide plate 2〇〇, (7 urine I turtle board 2〇2, and a light emitting diode 204. The light guide plate has a first surface 2〇〇〇 and a second surface 2002 opposite to each other, and the printed circuit The plate 202 has a third surface 2020 and a fourth surface 2 22 opposite to each other. The third surface 2〇2〇 faces the second surface 2002 of the light guide plate 200, and a reflective layer 2024 is disposed thereon to be reflected by the light guide plate 200. The light emitted. In practice, the reflective layer can be, but is not limited to, 'white paint, metal film, plated or polymer. The light emitting diode 204 is disposed on the third side 2020 of the printed circuit board 202. And electrically connected to the circuit of the printed circuit board 202 (not shown in the drawings), the light emitting diode 204 can be controlled by the printed circuit board 202 to emit light to the light guide plate 200. Please note that this embodiment Only one light-emitting diode is shown, but in practice, the number of light-emitting diodes can be set according to the needs of the user or the designer' and is not limited to the specific embodiment. The light emitting diode 204 is disposed on the third side 2020 of the printed circuit board 202, because The light guide plate 2A can include a recessed portion 2004 corresponding to the position of the light emitting diode 2〇4. When the backlight module 20 is assembled, the light guide plate 2 can be disposed on the printed circuit board 2〇2. The light-emitting diode 204 is partially accommodated in the recessed portion 2〇〇4, as shown in FIG. 2b. FIG. 2B is a schematic diagram of the backlight module 2〇 according to FIG. 28A. Please refer to FIG. 2A again. The backlight module 20 may further include a mask 206 disposed between the light guide plate 2 and the keyboard module 22. The mask 2〇6 is in practice and the T knife is reflected from the first side of the light guide plate 2 The light emitted by the cymbal. The mask 206 has a light transmissive area 2060 for light to pass through. The light-transmitting area 2〇6〇 can use transparent material f or broken hole to penetrate the light. For example, the light-transmitting area 2060 of Figure 2A is made of transparent material, and the light-transmissive area 2060 of Figure 2B is broken. hole. In this embodiment, the light-emitting diode 204 can travel toward the light guide plate 200 in the light-guide plate 200 and reach the first surface 2000 of the light guide plate, and the light is reflected and partially ray. Penetrate the first M395202 face 2000. Light that penetrates the first side 2000 will reach the mask 206, which in the light transmissive region 2060 will allow light to penetrate the keyboard mold and 22 and absorb or reflect light at other locations. Please note that in practice, this mask can also be omitted and the above mask function can be accomplished by the iron plate structure of the keyboard module. Light reflected by the first side 2000 of the light guide plate 200 or reflected by the mask 206 may advance toward the printed circuit board 202 in the light guide plate 200. When the light reaches the second side 2002 of the light guide plate 200 or the reflective layer 2024 of the printed circuit board 202, the light is again reflected and advanced toward the keyboard module η. With the above structure, the light-emitting diode can be disposed on the front surface of the light guide plate and travel in a reflective manner in the light guide plate. Compared with the prior art method of disposing a light source on the side of the light guide plate, the light emitted by the light source of the backlight module of the embodiment is also easily reflected and can be transmitted in the light guide plate and has a higher package reliability. Degree and lower production costs. In the present embodiment, the keyboard module 22 can include a substrate 220 and a key cap 222 disposed on the substrate 220, wherein the substrate 220 has a hole 2200 and the key cap 222 has a light transmitting region 2220. The light emitted by the light-emitting diode 204 passes through the light guide plate 200 and the mask 206 to reach the substrate 220, and the light-transmitting region 2220 of the key cap 222 can be irradiated through the hole 2200, and further can be placed above the key cap 222. The user observes the light. Please note that the light transmission design of the substrate is not limited to the hole, but is based on the needs of the user or the designer. For example, in another embodiment, the substrate can be made of a transparent material to be a transparent substrate, and the light emitted from the light guide plate can pass through the transparent substrate to illuminate the light transmitting region of the key cap. The light-emitting diode 204 of the embodiment is disposed on the third surface 2020 of the printed circuit board 202. Therefore, when the backlight module 2 is assembled, the light guide plate 200 9 M395202 j is provided with a recess portion 2004 to partially accommodate the light-emitting diode. . In the absence of the first-polar body (fine) (four) is not subject to the Sakimoto frequency embodiment. Referring to FIG. 3, FIG. 3 is a schematic diagram of the illuminated keyboard 3 according to the present embodiment. As shown in FIG. 3, the printed circuit board 302 of the backlight module 3G of the specific embodiment is different from the above example. A hole 3026 is included. The light-emitting diode 3G4 is disposed on the fourth surface 3022 of the printed circuit board 302 and corresponds to the position of the hole 3〇26. The light-emitting surface of the light-emitting diode 304 of the present embodiment faces the hole 6 so that the emitted light passes through the hole 3026 and reaches the light guide plate 3〇〇. The other elements of the illuminated keyboard 3 of the present embodiment are substantially the same as the corresponding units of the above-described embodiments, and thus will not be described again. Since the light-emitting diode 304 is disposed on the fourth surface 3〇22 of the printed circuit board, the light guide plate 3〇〇 does not need to be additionally provided with a recess to accommodate the light-emitting diodes 3〇4. In addition, the mask 306 has a light transmissive region 3060 for light to pass through. Similarly, in practice, the light transmissive region 3060 can pass light through a perforated or transparent material. In the present embodiment, the light transmissive region 3060 is a broken hole. Referring to FIG. 4, FIG. 4 is a schematic diagram showing another embodiment of the present invention, Lu Luguang keyboard 4. As shown in FIG. 4, the backlight-module 40 of the illuminated keyboard 4 includes a light guide plate 400, a printed circuit board 402, and a light-emitting diode 404. The units of the backlight module 40 of the present embodiment are substantially the same as the corresponding units of the above-described specific embodiments, and thus will not be further described herein. The backlight module 40 further includes a reflector 406 adjacent the first side 4000' of the light guide 400 and the keyboard module 42 is located above the fourth side 4022 of the printed circuit board 402. The backlight module 40 shown in FIG. 4 can be regarded as a lower-type backlight module 10 M395202 I · · In this embodiment, the LED 404 is electrically connected to the printed circuit board 402, and the LED 404 can be accommodated. In the recessed portion 4004 of the light guide plate 400, the light emitted by the light emitting diode 404 is incident on the light guide plate 4, and when the light travels in the light guide plate 400 to the first surface 4000 of the light guide plate 400, part of the light is reflected and Part of the light passes through the light guide plate 4, and then the light that passes through the light guide plate 400 is reflected by the reflection plate 406 and returns to the light guide plate 4''. Please note that in practice, the reflector can also be placed directly on the first side of the light guide to directly reflect most of the light, so the light φ does not need to pass through the light guide and travel to the reflector. The light reflected by the reflector 406 travels toward the printed circuit board 402 in the light guide plate 4, and is reflected by the second surface 4〇〇2 or the reflective layer 4024 of the light guide plate 4, so that the light can be guided. The light board is transferred in 4 turns. In addition, the reflective layer 4024 has a light transmissive region 4〇24 for light to pass through. Light Transmissive Zone 40240 allows light to pass through through holes or transparent materials. The first hole 4 〇 28 corresponding to the light transmitting area 4 〇 24 可 can be respectively disposed on the printed circuit board 402, so that light can pass through the first hole 4 〇 2 8 through the printed circuit board 4 〇 2 to reach the key disk module 4〇. Please note that in practice, the printed circuit board can also be made of a transparent material - a transparent printed circuit board, so there is no need to provide a first hole for light to pass through. Similarly, the light-emitting body may be disposed on the fourth side of the printed circuit board and corresponding to the second hole in the printed circuit board in another embodiment. The light emitted by the light emitting diode passes through the second hole to reach the light guide plate, and the wire is reflected by the first surface of the light guide plate or the reflective plate and then penetrates toward the printed circuit board, and then can be the second side of the light guide plate or Reflected by the reflective layer. The reflective layer allows light to pass through at a specific location, and the printed circuit board can be placed with a first hole for light to penetrate through this particular 11 M395202 position. In addition, the printed circuit board can be made of a transparent material and is a transparent printed circuit board, so that it is not necessary to separately provide a first hole and a second hole for light to pass through. The light emitted by the LED 404 of the present embodiment penetrates the printed circuit board 202 and passes through the keyboard module 42'. The user can pass through the transparent area 4220 of the keycap 422. Light was observed. A reflective layer is disposed on the printed circuit board to help reflect light in the light guide plate, and a reflective plate may be used instead of the reflective layer. Referring to FIG. 5, FIG. 5 is a schematic diagram of a backlight module not according to another embodiment of the present invention. As shown in FIG. 5, the backlight module 5A includes a printed circuit board 5A, a reflective plate 5〇2, a light guide plate 5〇4, a light-emitting diode 5〇6, and a mask 508. The printed circuit board 500 has a first surface 5〇〇〇, and the reflective plate 502 is disposed corresponding to the first surface 5000 and has a second surface 5020 facing the first surface 5000 of the printed circuit board 5, the reflective surface R1, and The first hole is 5〇22. The light guide plate 5〇4 is adjacent to the reflection plate 502, and has a third surface 5040 facing the reflection surface R1 and the fourth surface 5042 of the reflection plate 502. The mask 508 is adjacent to the fourth side 5042 of the light guide plate 504'. The LED 506 can be disposed on the first side 5000 of the printed circuit board 500' and electrically connected to the line thereon. The LED 506 is electrically connected to the printed circuit board 500, and the LED 506 is received in the recess 5044 of the light guide plate 504. The light emitted by the LED 506 can pass through the first hole 5022 of the reflector 502 and reach the third surface 5040 of the light guide plate 504. Then, the light can be used by the third surface 5040, the fourth surface 5042 or the mask 508. Reflected toward the reflector 502. The reflecting surface ri of the reflecting plate 502 re-reflects the light reflected by the third surface 12 M395202 5040, the fourth surface 5042 or the mask 508 toward the mask 508. In practice, the mask 508 has a light transmissive area 5 that allows light to pass through, allowing light to reach the keyboard module. Similarly, in the practice, the light-transmissive region 5_ can pass through the solar or perforated manner to allow light to pass through. In the specific embodiment, the light-transmitting region 5080 is made of a transparent material. Similarly, in the embodiment, the LED can be disposed on the fifth side of the printed circuit board opposite to the first surface, and the emitted line can pass through the second layer disposed on the printed circuit board. The holes or the printed circuit board itself is a transparent material that reaches the reflector. Referring to Figure 6, Figure 6 is a schematic illustration of a backlight module 60 in accordance with another embodiment of the present invention. As shown in FIG. 6, the backlight module 6A includes a printed circuit board 600, a reflective plate 602, a light guide plate 〇4, a light-emitting diode 606, and a mask 608. The printed circuit board 600 has a first side 6〇〇〇 and a second side 6002. The light guide plate 604 has a third side 6040 facing the first side 6000 of the printed circuit board 600, and the third side 6〇4〇 Four sides 6042. The reflecting plate 602 is adjacent to the light guiding plate 604 and its reflecting surface R2 faces the fourth surface 6042 of the light guiding plate 604. The mask 608 is adjacent to the second side 6002 of the printed circuit board 600. The LED 606 can be disposed on the first side 6000 of the printed circuit board 600 and electrically connected to the line thereon. The LED 606 is electrically connected to the printed circuit board 600, and the LED 606 is disposed in the recess 6044 of the light guide plate 604. The light emitted by the LED 606 can pass through the light guide plate 604 and be reflected by the third surface 6〇4〇 of the light guide plate 604, the fourth surface 6042, and the reflection surface R2 of the reflection plate 602. In the present embodiment, the printed circuit board 6 is a transparent printed circuit board. Thus, the reflected light can be reflected by the third side 6040 of the light guide 13 M395202 board 604 and the mask 6〇8. By means of the reflector 602 and the mask 608, the light can be reflected and moved in the light guide. In the peripheral, the mask 608 has a light transmissive area 6080 for the light to pass through, so that the light can reach the keyboard module. Similarly, the light-transmissive area can be made of a material of a transparent material by using a flipping material or a hole-breaking method. For example, as described above, the backlight module of the present invention can help the light to reflect by the reflective plate or the reflective layer provided on the printing plate. Therefore, the structure of the present invention can be set on the front side of the guide. Care, Compared with the value of =, the f-light module can be used in addition to having a capacitance and reflection. (4) == into: the light-type illumination source has a higher county reliability, and the above-mentioned preferred embodiment is described in detail. The characteristics and spirit of the present invention are not limited to the embodiments described above. On the contrary, the specific equality is arranged in this creation; '. Therefore, this creation & want to apply for the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 14 M395202 [Simplified Schematic] FIG. 1 is a cross-sectional view showing a prior art illuminated keyboard. Figure 2A is a schematic illustration of an illuminated keyboard in accordance with one embodiment of the present invention. FIG. 2B is a schematic diagram of the backlight module according to FIG. 2A. Figure 3 is a schematic illustration of an illuminated keyboard in accordance with another embodiment of the present invention. Figure 4 is a schematic illustration of an illuminated keyboard in accordance with another embodiment of the present invention. Figure 5 is a schematic diagram showing a backlight module according to another embodiment of the present invention. Figure 6 is a schematic diagram showing a backlight module according to another embodiment of the present invention. [Main component symbol description] 10: keyboard module 120: illumination source 1220: reflective component 1: illumination keyboard 12: backlight module 122: light guide plates 2, 3, 4: illuminated keyboard 20, 30, 40, 50, 60: Backlight module 15 M395202 22, 32, 42: keyboard module 200, 300, 400, 504, 604: light guide plate 202, 302, 402, 500, 600: printed circuit board 2〇4, 304, 404, 506, 606 : Light-emitting diodes 206, 306, 406, 508, 608: masks 2000, 3000, 4000, 5000, 6000: first faces 2002, 3002, 4002, 5020, 6002: second faces 2020, 3020, 4020, 5040 6040: third surface 2022, 3022, 4022, 5042, 6042: fourth surface 2024, 3024, 4024: reflective layer 2004, 4004, 5044, 6044: recessed portions 220, 320, 420: substrate 222, 322, 422: Key caps 2200, 3200, 4200: broken holes 2220, 3220, 4220: light transmitting area 3026: holes 4028, 5022: first holes 406, 502, 602: reflecting plates Rl, R2: reflecting surface 16 M395202 2060, 3060, 40240 , 5080, 6080: light transmission area 17