M435661 五、新型說明： 【新型所屬之技術領域】 本新型是有關於一種發光鍵盤，特別是指一種發光 鍵盤的背光模組。 【先前技術】 現有的發光鍵盤包括一按鍵模組，及一設置在按鍵 模組下方的背光模組。背光模組包括一發光單元，發光 單元的線路大都是透過鍍銅、覆膜、顯影及蝕刻的加工 步驟成形於軟性電路板上，由於線路製作過程複雜且 使用的材料單價成本高，因此，使得背光模組的製造成 本較高。另一方面，由於軟性電路板是透過上下堆疊的 方式與背光模組的其他元件（例如為遮罩、導光板或反射 板）相堆疊在一起，使得發光鍵盤的整體厚度較厚，無法 使發光鍵盤更進一步薄型化。 【新型内容】M435661 V. New description: [New technical field] The present invention relates to an illuminated keyboard, and more particularly to a backlight module for an illuminated keyboard. [Prior Art] The existing illuminated keyboard includes a button module and a backlight module disposed under the button module. The backlight module comprises a light-emitting unit, and the lines of the light-emitting unit are mostly formed on the flexible circuit board through the processing steps of copper plating, film coating, development and etching, because the circuit manufacturing process is complicated and the material used cost is high, so that The manufacturing cost of the backlight module is high. On the other hand, since the flexible circuit board is stacked with other components of the backlight module (for example, a mask, a light guide plate, or a reflective plate) by stacking up and down, the overall thickness of the illuminated keyboard is thick, and the light cannot be made. The keyboard is further thinned. [New content]
因此，本新型之目的，即在提供一種簡化製程、降 低材料成本，並能朝向輕薄化方式設計的發光鍵盤。 於疋本新型發光鍵盤，包含多個鍵帽、一導光板 、一反射板、一遮罩、一薄膜電路板及一發光單元。 該導光板設置在所述鍵帽下方。該反射板設置於該導光板 下方。該遽罩設置於所述鍵帽下方且在該導光板上方。該 薄膜電路板設置於所述鍵帽下方且該遮罩上方。該發光單 兀具有-導電線路，及—電連接於該導電線路上的發光元 件，該導電線路是以絲網印刷方式成形於該反射板該遮 3 罩及該薄膜電路板其中之一上的銀線線路，該發光元件入 射該導光板光線，透過該遮罩、該導光板及該反射板相配 合，使射出的光線朝對應的所述鍵帽照明。 較佳地’該反射板具有一上表面，該導電線路印刷 成形於該上表面。 較佳地’該導光板形成一供該發光元件穿設的穿孔 0 較佳地，該發光單元還具有一設置於該反射板的上 表面且蓋覆該導電線路的蓋體，該蓋體形成一供該發光 元件穿設的通孔。 較佳地’ 3亥遮罩具有一下表面’該導電線路印刷成 形於該遮罩的下表面。 較佳地’該導光板形成一供該發光元件穿設的穿孔 〇 較佳地，該發光單元還具有一設置於該遮罩的下表 面且蓋覆該導電線路的蓋體，該蓋體形成一供該發光元 件穿設的通孔》 較佳地，該薄膜電路板具有一下表面，該導電線路 印刷成形於該薄膜電路板的下表面。 較佳地’該發光鍵盤還包含一設置在該遮罩與該薄 膜電路板間的底板，該遮罩、該底板與該導光板分別一 供該發光元件穿設的穿孔。 較佳地，該發光單元還具有一設置於該薄膜電路板 的下表面且蓋覆該導電線路的蓋體，該蓋體形成一供該 M435661 發光元件穿設的通孔。 本新型之功效在於：藉由導電線路以絲網印刷成形 於薄膜電路板、遮罩及反射板其中之一上’能省略現有 的發光裝置所需的軟性電路板，而更呈薄型化’且不需 繁複的製程，進而節省製造工時及製造成本。 【實施方式】 有關本新型之前述及其他技術内容、特點與功效， 在以下配合參考圖式之三個較佳實施例的詳細說明中， 將可清楚地呈現。 參閱圖1’本新型發光鍵盤的第一實施例包含發光鍵 盤包含一頂蓋1、多個鍵帽21、對應設置於所述鍵帽21 下方的多個剪式支架22及多個彈性元件（Rubber Dome， 圖未示）、一設置在所述剪式支架22及彈性元件下方的薄 膜3、一設置在薄膜3下方的薄膜電路板4，及一設置在 薄膜電路板4下方的底板5。具體來說，頂蓋1形成多個 開口 11，所述鍵帽21對應地分別凸伸於所述開口丨丨而 外露出頂蓋1。薄膜3、薄膜電路板4、底板5分別與頂 蓋1之間是透過熱溶方式固定在—起。當鍵帽21被按壓 時，鍵帽會壓縮對應的彈性元件使其與薄膜電路板4 上的對應電性接點（圖未示）接觸導通，產生對應按壓的電 路訊號。在本實施例中於鍵帽21上的符號是以透明材質 所製成以形成一符號區域（圖未示），可供光線穿透。薄膜 3為塑膠薄膜（Mylar)。 參閱圖i、圖2與圖3,發光鍵盤還包含一設置於底 5 板5下方的遮罩（Masking) 6、一設置於遮罩6下方的導 光板（LGP) 7 、一設置於導光板7下方的反射板 (Reflector) 8’及一發光單元9，底板5、遮罩6、導光板 7，及反射板8是透過如背膠的膠合方式，上下堆疊固定 。發光單元9具有一導電線路91，及多個彼此相間隔排 列且電連接於導電線路91上的發光元件92。 更確切的說’反射板8具有一上表面81，導電線路 91是以絲網印刷方式成形於上表面8 1的銀線線路，發光 單元9還具有一設置於反射板8的上表面81且蓋覆導電· 線路91的蓋體93，蓋體93形成數量對應發光元件92數 量的通孔94，各發光元件92穿設的對應的通孔94，且 各發光元件92凸伸出對應的通孔94而外露出蓋體93。 參閱圖3與圖4’需先說明的是圖4僅顯示一個鍵帽 21 ’來說明從發光元件92到鍵帽21的光線行進路徑。 導光板7形成數量對應發光元件92數量且供發光元件92 穿設的穿孔71(見圖1)。遮罩6形成有一不透光區61， 及複數分別對應與所述鍵帽21位置的透光區62，透光區_ 62可透出光線。再者，薄膜3、薄膜電路板4、底板5分 別形成對應各鍵帽21的貫孔31、41、51。發光元件92 所產生的光線入射至導光板7並在導光板7傳導行進， 經由導光板7傳導至遮罩6的一部分光線會經過遮罩6 的透光區62,及底板5、薄膜電路板4、薄獏3對應鍵帽 21的貫孔51、41、31而對鍵帽21的符號區域產生照明 效果。另外，經由導光板7傳導至遮罩6的另一部分光 M435661 線會被遮罩6的不透光區61反射回導光板7，且反射板 8也可將射入的光線反射回導光板7，以增加光線在導光 板7行進的利用率。較佳地，導光板7的對應各鍵帽21 的下表面塗佈光反射層（如反光油墨，圖未示），光線行經 光反射層反射光線進入導光板7時，會提高光線反射率 ’使透出鍵帽21的符號區域的光線更加明亮；而在導光 板7非屬對應各鍵帽21的區域，則是利用反射板8反射 光線進入導光板7。 在本實施例中，蓋體93形成多個間隔排列的通孔94 ’導光板7形成多個間隔排列的穿孔7 i，各發光元件92 可穿設於對應的通孔94與穿孔71。但是在設計上，發光 元件92數量不限於多個，也可只有一個發光元件92的 情形’蓋體93也可只對應形成一個通孔94，且導光板7 也可只對應形成一個穿孔71。 本實施例是直接將導電線路91以絲網印刷方式成形 於反射板8的上表面81，省略現有的發光裝置所需的軟 性電路板，與現有技術相較更呈薄型化，且不需經過繁 複的鍍銅 '覆膜、顯影及姓刻加工步驟，可節省製造工 時及製造成本，進而提高市場競爭力。 參閱圖5、圖6與圖7，為本新型發光鍵盤的第二實 施例大致與第-實施例相同’主要差異處為發光單元9設 置於遮罩6的下表面63。 遮罩6具有一下表面63，導電線路91是以絲網印刷 成形於遮罩6的下表面63的銀線線路。發光單元9還具 7 有—設置於遮罩6的下表面63且蓋覆導電線路91的蓋 體93’蓋體93形成數量對應發光元件92數量且供發光 疋件92穿設的通孔94。另外，導光板7形成有數量對應 發光元件92數量且供發光元件92穿設的穿孔71。在本 實施例中’蓋體93形成多個間隔排列的通孔94，導光板 7形成多個間隔排列的穿孔7丨。但是在設計上，發光元 件92數量不限於多個，也可只有一個發光元件92的情 形，蓋體93也可只對應形成一個通孔94，且導光板7也 可只對應形成一個穿孔71。 參閱圖8，僅示意一個鍵帽21用以說明第二實施例 的發光元件92到鍵帽21光線行進路徑，其與圖4所示 的第一實施例光線行進路徑大致相同，主要差異處為發 光單元9設置於遮罩6的下表面63(見圖7)，故在此不詳 加贅述。 參閱圖9、圖1〇與圖u，為本新型發光鍵盤的第三 實施例大致與第一實施例相同，主要差異處為發光單元9 設置於薄膜電路板4的下表面42。 薄膜電路板4具有一下表面42，導電線路91是以絲 網印刷成形於薄膜電路板4的下表面42的銀線線路發光 單兀9還具有一設置於薄膜電路板4的下表面42且蓋覆 導電線路91的蓋體93，蓋體93形成數量對應發光元件 92數量且供發光元件92穿設的通孔％。底板5、遮罩6 與導光板7分別形成數量對應發光元件92數量且供發光 το件92穿設的穿孔52、64、71。在本實施例中蓋體 8 M435661 93形成多個間隔排列的通孔94，底板5、遮罩6與導光 板7分別形成多個間隔排列的穿孔52、64、71❶但是在 設計上’發光元件92 &量不限於多個，也可只有一個發 光元件92的情形’蓋體93也可只對應形成一個通孔％ ’底板5、遮罩6與導光板7也可只分別對應形成一個穿 孔 52、64、71。 參閱圊12，僅示意一個鍵帽21帛以說明第三實施例 的發光το件92到鍵帽21光線行進路徑，其與圖4所示 的第一實施例的光線行進路徑大致相同，主要差異處為 發光單元9 δ又置於薄膜電路板4的下表面41(見圖u): 故在此不詳加贅述。 ‘'上所述，本新型發光鍵盤，藉由導電線路91以絲 網印刷成形於薄膜電路板4、遮罩6及反射板8其中之— 上，能省略現有的發光裝置所需的軟性電路板，而更呈 薄Ϊ•化且不⑥繁複製程，進而節省製造工時及製造成 本，故確實能達成本新型之目的。 惟以上所述者，僅為本新型之較佳實施例而已，當 不能以此限定本新型實施之範圍，即大凡依本新型申請 專利範圍及新型說明内容所作之簡單的等效變化與修飾 ’皆仍屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一立體分解圖’說明本新型發光鍵盤的第一較 佳實施例； 圖2是一局部的立體分解圖，說明一發光單元設置在 9 M435661 一反射板的上表面； 圖3是一局部放大圖，說明該發光單元設置在該反射 板的上表面； 圖4疋一剖視示意圖，說明第一較佳實施例的發光元 件到鍵帽的光線行進路徑，圖中僅示意一個鍵帽 9 圖5疋一立體分解圖，說明本新型發光鍵盤的第二較 佳實施例； 圖6是一局部的立體分解圖，說明一發光單元設置在 一遮罩的下表面； 圖7是一局部放大圖，說明該發光單元設置在該遮罩 的下表面； 圖8是一剖視示意圖’說明第二較佳實施例的發光元 件到鍵帽的光線行進路徑，圖中僅示意一個鍵帽 9 圖9是一立體分解圖’說明本新型發光鍵盤的第三較 佳實施例； 圖10是一局部的立體分解圖，說明一發光單元設置在 一薄膜電路板的下表面； 圖11是一局部放大圖，說明該發光單元設置在該薄膜 電路板的下表面；及 圖12是一剖視示意圖，說明第三較佳實施例的發光元 件到鍵帽的光線行進路徑，圖中僅示意一個鍵帽 10 M435661 【主要元件符號說明】 I ..........頂蓋 II .........開口 21 .........鍵帽 22 .........剪式支架 3 ..........薄膜 31.........貫孔 4 ..........薄膜電路板 41 .........貫孔 42 .........下表面 5 ..........底板 51 .........貫孔 52 .........穿孔 6 ..........遮罩 61 .........不透光區 62 .........透光區 63 .........下表面 64 .........穿孔 7 ..........導光板 71.........穿孔 8 ..........反射板 81.........上表面 9 ..........發光單元 91 .........導電線路 92 .........發光元件 93 .........蓋體 94 .........通孔Therefore, the object of the present invention is to provide an illuminated keyboard that is simplified in process, reduces material cost, and can be designed in a slim and light manner. The novel illuminated keyboard comprises a plurality of key caps, a light guide plate, a reflector, a mask, a film circuit board and an illumination unit. The light guide plate is disposed under the keycap. The reflector is disposed below the light guide plate. The hood is disposed under the keycap and above the light guide plate. The thin film circuit board is disposed under the keycap and above the mask. The light-emitting unit has a conductive line, and a light-emitting element electrically connected to the conductive line, and the conductive line is formed by screen printing on the reflective plate and the thin film circuit board. In the silver line, the light-emitting element enters the light of the light guide plate, and the light guide plate and the reflector are matched by the mask, so that the emitted light is illuminated toward the corresponding keycap. Preferably, the reflecting plate has an upper surface on which the conductive trace is printed. Preferably, the light guide plate defines a through hole 0 for the light emitting element to pass through. Preferably, the light emitting unit further has a cover body disposed on the upper surface of the reflective plate and covering the conductive line, and the cover body is formed. A through hole for the light emitting element to pass through. Preferably, the <3"""""" Preferably, the light guide plate forms a perforation for the light-emitting element. Preferably, the light-emitting unit further has a cover disposed on the lower surface of the cover and covering the conductive line, and the cover is formed. A through hole for the light emitting element to pass through. Preferably, the thin film circuit board has a lower surface, and the conductive line is printed and formed on the lower surface of the thin film circuit board. Preferably, the illuminated keyboard further includes a bottom plate disposed between the mask and the film circuit board, and the mask, the bottom plate and the light guide plate respectively provide a through hole for the light emitting element to pass through. Preferably, the light emitting unit further has a cover disposed on the lower surface of the thin film circuit board and covering the conductive line, and the cover forms a through hole through which the M435661 light emitting element is disposed. The effect of the present invention is that the screen is formed on one of the thin film circuit board, the mask and the reflective plate by a conductive circuit, and the flexible circuit board required for the existing light-emitting device can be omitted, and the thickness is further reduced. No complicated process is required, which saves manufacturing man-hours and manufacturing costs. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to FIG. 1 , a first embodiment of the present illuminated keyboard includes a top cover 1 , a plurality of key caps 21 , a plurality of scissor brackets 22 disposed under the key caps 21 , and a plurality of elastic elements ( A rubber dome (not shown), a film 3 disposed under the scissor holder 22 and the elastic member, a film circuit board 4 disposed under the film 3, and a bottom plate 5 disposed under the film circuit board 4. Specifically, the top cover 1 defines a plurality of openings 11, and the key caps 21 respectively protrude from the opening 丨丨 to expose the top cover 1. The film 3, the film circuit board 4, and the bottom plate 5 are fixed to the top cover 1 by heat-dissipating means. When the keycap 21 is pressed, the keycap compresses the corresponding elastic member to make contact with a corresponding electrical contact (not shown) on the thin film circuit board 4 to generate a correspondingly pressed circuit signal. The symbol on the keycap 21 in this embodiment is made of a transparent material to form a symbol area (not shown) for light to pass through. The film 3 is a plastic film (Mylar). Referring to FIG. 2, FIG. 2 and FIG. 3, the illuminated keyboard further comprises a masking 6 disposed under the bottom 5 panel 5, a light guide panel (LGP) 7 disposed under the mask 6, and a light guide panel disposed on the light guide panel. 7 The lower reflector 8' and a light-emitting unit 9, the bottom plate 5, the mask 6, the light guide plate 7, and the reflection plate 8 are stacked and fixed by being glued by a glue. The light unit 9 has a conductive line 91 and a plurality of light emitting elements 92 spaced apart from each other and electrically connected to the conductive line 91. More specifically, the reflecting plate 8 has an upper surface 81, the conductive line 91 is a silver line formed on the upper surface 81 by screen printing, and the light emitting unit 9 further has an upper surface 81 disposed on the reflecting plate 8 and Covering the cover 93 of the conductive line 91, the cover 93 forms a number of through holes 94 corresponding to the number of the light-emitting elements 92, the corresponding through holes 94 of the light-emitting elements 92, and the light-emitting elements 92 protrude correspondingly. The cover 94 is exposed outside the hole 94. Referring to Figures 3 and 4', it is to be noted that Figure 4 shows only one keycap 21' to illustrate the path of light travel from the light-emitting element 92 to the keycap 21. The light guide plate 7 is formed with a number of perforations 71 corresponding to the number of light-emitting elements 92 and for the light-emitting elements 92 to pass through (see Fig. 1). The mask 6 is formed with an opaque region 61, and a plurality of transparent regions 62 respectively corresponding to the positions of the keycaps 21, and the light-transmitting regions _62 can transmit light. Further, the film 3, the film board 4, and the bottom plate 5 are formed with through holes 31, 41, and 51 corresponding to the key caps 21, respectively. The light generated by the light-emitting element 92 is incident on the light guide plate 7 and conducts on the light guide plate 7. A part of the light transmitted to the mask 6 via the light guide plate 7 passes through the light-transmitting region 62 of the mask 6, and the bottom plate 5 and the thin film circuit board. 4. The thin raft 3 corresponds to the through holes 51, 41, 31 of the keycap 21 to illuminate the symbol area of the keycap 21. In addition, another portion of the light M435661 line that is conducted to the mask 6 via the light guide plate 7 is reflected back to the light guide plate 7 by the opaque region 61 of the mask 6, and the reflection plate 8 can also reflect the incident light back to the light guide plate 7. In order to increase the utilization rate of light traveling on the light guide plate 7. Preferably, the lower surface of the corresponding keycap 21 of the light guide plate 7 is coated with a light reflecting layer (such as a reflective ink, not shown), and when the light passes through the light reflecting layer to enter the light guiding plate 7, the light reflectivity is improved. The light that has passed through the symbol area of the keycap 21 is made brighter. When the light guide plate 7 is not in the area corresponding to each of the keycaps 21, the light is reflected by the reflecting plate 8 and enters the light guide plate 7. In the present embodiment, the cover body 93 is formed with a plurality of spaced-apart through holes 94. The light guide plate 7 defines a plurality of spaced-apartted through holes 7i. The light-emitting elements 92 can be disposed through the corresponding through holes 94 and the through holes 71. However, in the design, the number of the light-emitting elements 92 is not limited to a plurality, and only one of the light-emitting elements 92 may be used. The cover body 93 may also be formed with only one through hole 94, and the light guide plate 7 may have only one through hole 71 corresponding thereto. In this embodiment, the conductive line 91 is directly formed on the upper surface 81 of the reflector 8 by screen printing, and the flexible circuit board required for the conventional light-emitting device is omitted, which is thinner than the prior art and does not need to go through. The complicated copper plating 'filming, development and surname processing steps can save manufacturing man-hours and manufacturing costs, thereby improving market competitiveness. Referring to Figures 5, 6 and 7, the second embodiment of the present illuminated keyboard is substantially identical to the first embodiment. The main difference is that the illumination unit 9 is disposed on the lower surface 63 of the mask 6. The mask 6 has a lower surface 63, and the conductive line 91 is a silver line formed by screen printing on the lower surface 63 of the mask 6. The light-emitting unit 9 further has a cover 93 that is disposed on the lower surface 63 of the mask 6 and covers the conductive line 91. The cover 93 forms a number of through holes 94 corresponding to the number of the light-emitting elements 92 and for the light-emitting elements 92 to pass through. . Further, the light guide plate 7 is formed with a number of perforations 71 corresponding to the number of light-emitting elements 92 and for the light-emitting elements 92 to pass through. In the present embodiment, the cover 93 is formed with a plurality of spaced-apart through holes 94, and the light guide plate 7 is formed with a plurality of spaced-apart perforations 7'. However, in the design, the number of the light-emitting elements 92 is not limited to a plurality, and only one light-emitting element 92 may be formed. The cover body 93 may also form a through-hole 94 only, and the light guide plate 7 may also form a single through-hole 71. Referring to FIG. 8, only one keycap 21 is illustrated to illustrate the light path of the light-emitting element 92 of the second embodiment to the keycap 21, which is substantially the same as the light travel path of the first embodiment shown in FIG. 4, and the main difference is The light emitting unit 9 is disposed on the lower surface 63 of the mask 6 (see FIG. 7), and thus will not be described in detail herein. Referring to Fig. 9, Fig. 1 and Fig. u, the third embodiment of the novel illuminated keyboard is substantially the same as the first embodiment. The main difference is that the light emitting unit 9 is disposed on the lower surface 42 of the thin film circuit board 4. The thin film circuit board 4 has a lower surface 42. The conductive line 91 is screen printed on the lower surface 42 of the thin film circuit board 4. The silver line illuminating unit 9 further has a lower surface 42 disposed on the thin film circuit board 4 and covered. The cover 93 of the conductive line 91 is covered, and the cover 93 is formed with a number of through holes % corresponding to the number of the light-emitting elements 92 and for the light-emitting elements 92 to pass through. The bottom plate 5, the mask 6 and the light guide plate 7 respectively form perforations 52, 64, 71 for the number of light-emitting elements 92 and for the light-emitting elements 92 to pass through. In the present embodiment, the cover 8 M435661 93 forms a plurality of spaced-apart through holes 94. The bottom plate 5, the mask 6 and the light guide plate 7 respectively form a plurality of spaced-apart perforations 52, 64, 71, but are designed to be 'light-emitting elements. The amount of 92 & is not limited to a plurality, and there may be only one light-emitting element 92. 'The cover body 93 may also be formed corresponding to only one through hole % 'the bottom plate 5, the mask 6 and the light guide plate 7 may also respectively form a perforation correspondingly. 52, 64, 71. Referring to FIG. 12, only one keycap 21''''''''''''''''''''''''' The light-emitting unit 9 δ is again placed on the lower surface 41 of the thin film circuit board 4 (see FIG. 9): therefore, it will not be described in detail herein. The above-mentioned light-emitting keyboard is formed by screen printing on the thin film circuit board 4, the mask 6 and the reflection plate 8 by the conductive line 91, and the soft circuit required for the existing light-emitting device can be omitted. The board is thinner and more versatile and does not have a complicated reproduction process, thereby saving manufacturing man-hours and manufacturing costs, so that the purpose of the present invention can be achieved. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the new description content. All remain within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view illustrating a first preferred embodiment of the present illuminated keyboard; FIG. 2 is a partial exploded perspective view showing a light emitting unit disposed on a reflector of 9 M435661 Figure 3 is a partially enlarged view showing the light-emitting unit disposed on the upper surface of the reflector; Figure 4 is a cross-sectional view showing the light path of the light-emitting element to the keycap of the first preferred embodiment, FIG. 6 is a partially exploded perspective view showing a light emitting unit disposed on a lower surface of a mask; FIG. 6 is a partially exploded perspective view of the present invention; FIG. FIG. 7 is a partially enlarged view showing the light emitting unit disposed on the lower surface of the mask; FIG. 8 is a cross-sectional view illustrating the light traveling path of the light emitting element to the key cap of the second preferred embodiment, in which FIG. 9 is a perspective exploded view illustrating a third preferred embodiment of the present illuminated keyboard; FIG. 10 is a partial exploded perspective view showing a light emitting unit disposed in a thin film circuit FIG. 11 is a partially enlarged view showing the light emitting unit disposed on the lower surface of the thin film circuit board; and FIG. 12 is a cross-sectional view showing the light of the light emitting element to the key cap of the third preferred embodiment Travel path, only one keycap 10 M435661 is shown in the figure. [Main component symbol description] I .......... top cover II ......... opening 21 ....... .. key cap 22 ......... scissor bracket 3 .......... film 31 ... ... through hole 4 ........ .. film circuit board 41 ... ... through hole 42 ... ... lower surface 5 .......... bottom plate 51 ........ Through hole 52 ... ... perforation 6 ..... mask 61 ... ... opaque area 62 ........ Light transmissive area 63 ... ... lower surface 64 ... ... perforation 7 .......... light guide plate 71 ......... Perforation 8 ..........reflecting plate 81 .... upper surface 9 ..... light emitting unit 91 ... ... conductive Line 92 .... illuminating element 93 ... ... cover 94 ... ... through hole
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