M332171 鍵99之間具有間隙’小型發光體96之部分光線無法全部導 入導光片20中’而是會有部分光線散射至導光片％上方之 不需照亮之區域’使得小型發光體96之光線無法全部有效 的利用。 為了減少散失於間隙之光線，於先前技術中，常获助 額外附加之遮光片98貼於導光片20上方，光線便無法^遮 光片98之貼附位置散失，以增加小型發光體％之光線導入 導光片96内的比率。但是，只要未貼遮光片98之其他部分 還是會產生光線的散失。 另外，當導光片20越長時，即表示光線傳遞距離增加， 若無法將小型發光體96的光線利用效率提升，距離小型發 光體96越遠則光線發散越多，極易導致按鍵99過暗或亮度 不平均。 一此外，若小型發光體96為侧向發光之發光二極體時， 當發光二極體之尺寸越高時，#光二極體之發光位置與導 ，片20的輯增加，亦即發光二極體之出光位置高於導光 片20之位置，因而導致較多光線無法導入 =導=2。與接賴之間的間隊中，因=光= =:先=術之導光結構—寸較 因此，有必要提供一種片狀導光結 增加聚光與減少光消耗，以改善先前技術所^的問題。、 【新型内容】 M332171 本創作之目的係在提供可增加聚光與減少光消耗之片 狀導光結構。 本創作之另一目的係在提供具有可增加聚光與減少光 消耗之片狀導光結構之電子裝置。 為達成上述之目的，本創作之具有片狀導光結構之電 子裝置包括印刷電路板、金屬彈片層、複數小型發光體、 片狀導光結構與複數按鍵。其中，片狀導光結構包括第一 反光層、第二反光層與導光片。其中’第一反光層係位於 金屬彈片層之上，第一反光層之至少一部份具有高反射材 質；第二反光層係位於複數按鍵之下，第二反光層之至少 一部份具有高反射材質；以及導光片係設置於第一反光層 與第二反光層之間，導光片係傳遞複數小型發光體之光 線。藉由上述結構，小型發光體之光線可經由片狀導光結 構傳遞以照亮複數按鍵，並且藉由第一反光層與第二反光 層以降低複數小型發光體之光線散失。 根據本創作其中之一實施方式，第一反光層、導光片 與第二反光層係結合為一體，第一反光層與第二反光層係 為白色橡膠，且折射部係為複數開孔。 【實施方式】 為讓本創作之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉出本創作之具體實施例，並配合所附圖式， 作詳細說明如下。 請先參考圖2,係本創作具有片狀導光結構之電子裝置 7 M332171 之示意圖。本創作之電子裝置90内部具有小型發光體96， 使得使用者於光線不足的場合中亦能看清按鍵99。舉例來 .說，電子裝置90可為手機、PDA等。 電子裝置90包括印刷電路板92、金屬彈片層94、複數 •小型發光體96、片狀導光結構1與複數按鍵99。其中，複數 _ 小型發光體96設置於印刷電路板92上，係為照亮複數按鍵 99之光源，於本實施例中，小型發光體96係為發光二極體 (LED)。金屬彈片層94位於印刷電路板92之上，片狀導光 φ 結構1位於金屬彈片層94之上，複數按鍵99位於片狀導光結 構1之上。藉由上述結構，小型發光體96之光線可經由片狀 導光結構1傳遞以照亮複數按鍵99，並且可降低小型發光體 96之光線散失。以下便詳細說明片狀導光結構丨之細部組成 結構與原理。 接著請參考圖3，係為本創作之片狀導光結構之示意 圖。片狀導光結構1位於金屬彈片層94與複數按鍵99之間， 包括第一反光層10、導光片20與第二反光層30。其中，導 • 光片20位於第一反光層1〇之上，第二反光層30位於導光片 20之上。 -· 於本實施例中，第一反光層10、導光片20與第二反光 層30係結合為一體，使得導光片2〇包覆於第一反光層10與 第二反光層30之間。導光片2〇(iight guide film，LGF或light ^ guide Plate，LGP)係為透明片體，其有助於導光，小型發光 體96之光線可藉由導光片2〇均勻導出。由於導光片2〇為習 知技術，因此不再贅述。 8 M332171 第—反光層10與第二反光層30之至少一部份包括具有 高反射與聚光效果之材質，使得導光片2〇藉由第一反光層 10與第二反光層30的輔助，可充分傳遞小型發光體96之光 線，減少不必要的光源散失。 當第一反光層10與第二反光層30為不透明時，為了協 助反光與導光，且避免產生吸光之光線消耗，至少一部份 之第一反光層10與第二反光層30(如靠近導光片20之部位） 係使用如淺色或亮色等利於聚光之顏色，以協助光線於第 一反光層10與第二反光層30中進行導光。於本實施例中， 第一反光層1〇與第二反光層30係為白色橡膠，白色橡膠可 將橡膠原料直接藉由染色的方式製成。 若第一反光層10與第二反光層30包括非不透明層（包 括透明與半透明）時，表示部分光線會穿透此非不透明層而 散失。此時必須另外附加一層不透明且具反光效果之塗 料’以增加反射效果與降低光線散失。 請參考圖4，係為片狀導光結構另一示意圖。片狀導光 結構la包括第一反光層10a、導光片2〇與第二反光層3〇a。 其中’導光片20位於第一反光層l〇a之上，第二反光層 位於導光片20之上。 第一反光層10a包括第一非不透明層12a與第一反光冷 料14a。第一反光塗料14a係塗布於第一非不透明層12&外 側’使得第一非不透明層12a位於導光片20與該第一反光冷 料14a之間。另外，第二反光層30a包括第二非不透明層3以 與第二反光塗料34a。第二反光塗料34a係塗布於第二非不 9There is a gap between the M332171 keys 99. Some of the light of the small illuminator 96 cannot be introduced into the light guide sheet 20, but some light is scattered to the area above the light guide sheet that does not need to be illuminated. The light cannot be fully utilized. In order to reduce the light that is lost in the gap, in the prior art, the additional light-shielding sheet 98 is often attached to the light-guiding sheet 20, and the light cannot be removed from the attachment position of the light-shielding sheet 98 to increase the small-sized light-emitting body. The ratio of light into the light guide 96. However, as long as the other portions of the light-shielding sheet 98 are not attached, light loss is generated. In addition, when the light guide sheet 20 is longer, it means that the light transmission distance is increased. If the light utilization efficiency of the small illuminator 96 cannot be improved, the farther the light illuminator 96 is, the more the light diverge, and the button 99 is easily caused. Dark or uneven brightness. In addition, if the small-sized illuminator 96 is a laterally-emitting illuminating diode, when the size of the illuminating diode is higher, the illuminating position and the guide of the photodiode are increased, that is, the illuminating two The light-emitting position of the polar body is higher than the position of the light guide sheet 20, so that more light cannot be introduced ===2. In the inter-team between the two, because of = light = =: first = the light guide structure of the surgery - inch, therefore, it is necessary to provide a sheet-shaped light guide junction to increase the concentration of light and reduce light consumption, to improve the prior art ^ The problem. [New Content] M332171 The purpose of this creation is to provide a sheet-shaped light guiding structure that can increase the concentration of light and reduce the light consumption. Another object of the present invention is to provide an electronic device having a sheet-like light guiding structure that can increase concentrating and reduce light consumption. In order to achieve the above object, the electronic device having the sheet-shaped light guiding structure comprises a printed circuit board, a metal dome layer, a plurality of small illuminators, a sheet-shaped light guiding structure and a plurality of buttons. The sheet light guiding structure includes a first light reflecting layer, a second light reflecting layer and a light guiding sheet. Wherein the first reflective layer is located above the metal dome layer, at least a portion of the first reflective layer has a highly reflective material; the second reflective layer is located under the plurality of keys, and at least a portion of the second reflective layer has a high The reflective material is disposed between the first light reflecting layer and the second light reflecting layer, and the light guiding sheet transmits the light of the plurality of small light emitting bodies. With the above structure, the light of the small illuminator can be transmitted through the sheet-like light guiding structure to illuminate the plurality of keys, and the first reflecting layer and the second reflecting layer can be used to reduce the light loss of the plurality of small illuminators. According to one embodiment of the present invention, the first light reflecting layer, the light guiding sheet and the second light reflecting layer are integrated, the first light reflecting layer and the second light reflecting layer are white rubber, and the refracting portion is a plurality of openings. [Embodiment] The above and other objects, features and advantages of the present invention will become more apparent and understood. Please refer to FIG. 2 first, which is a schematic diagram of an electronic device 7 M332171 having a sheet-shaped light guiding structure. The electronic device 90 of the present invention has a small illuminator 96 inside, so that the user can see the button 99 in the case of insufficient light. For example, the electronic device 90 can be a mobile phone, a PDA, or the like. The electronic device 90 includes a printed circuit board 92, a metal dome layer 94, a plurality of small illuminators 96, a sheet-like light guiding structure 1 and a plurality of buttons 99. The plurality of small illuminators 96 are disposed on the printed circuit board 92 to illuminate the light source of the plurality of keys 99. In the present embodiment, the small illuminators 96 are light emitting diodes (LEDs). The metal dome layer 94 is positioned over the printed circuit board 92, the sheet-shaped light guide φ structure 1 is positioned over the metal dome layer 94, and the plurality of buttons 99 are located above the sheet-like light guiding structure 1. With the above structure, the light of the small illuminator 96 can be transmitted through the sheet-like light guiding structure 1 to illuminate the plurality of keys 99, and the light loss of the small illuminating body 96 can be reduced. The details of the structure and principle of the detailed structure of the sheet-shaped light guiding structure will be described below. Next, please refer to FIG. 3, which is a schematic diagram of the sheet-shaped light guiding structure of the present invention. The sheet-shaped light guiding structure 1 is located between the metal dome layer 94 and the plurality of buttons 99, and includes a first light reflecting layer 10, a light guiding sheet 20 and a second light reflecting layer 30. The light guide 20 is located above the first light reflecting layer 1 , and the second light reflecting layer 30 is located above the light guide sheet 20 . In the embodiment, the first light reflecting layer 10, the light guiding sheet 20 and the second light reflecting layer 30 are integrated, so that the light guiding sheet 2 is covered by the first light reflecting layer 10 and the second light reflecting layer 30. between. The iight guide film (LGF or light ^ guide plate, LGP) is a transparent sheet which helps to guide light, and the light of the small illuminator 96 can be uniformly led out by the light guide sheet 2 . Since the light guide sheet 2 is a conventional technique, it will not be described again. 8 M332171 The at least one portion of the first reflective layer 10 and the second reflective layer 30 includes a material having a high reflection and condensing effect, so that the light guide sheet 2 is assisted by the first reflective layer 10 and the second reflective layer 30. The light of the small illuminator 96 can be fully transmitted, and unnecessary light source loss can be reduced. When the first light-reflecting layer 10 and the second light-reflecting layer 30 are opaque, at least a portion of the first light-reflecting layer 10 and the second light-reflecting layer 30 (such as near) in order to assist the light-reflecting and light-conducting, and to avoid the light-consuming light absorption. The light guide sheet 20 is formed by using a color such as a light color or a bright color to facilitate the light collection in the first light reflecting layer 10 and the second light reflecting layer 30. In the embodiment, the first light reflecting layer 1〇 and the second light reflecting layer 30 are made of white rubber, and the white rubber can be made by directly dyeing the rubber raw material. If the first light reflecting layer 10 and the second light reflecting layer 30 comprise a non-opaque layer (including transparent and translucent), it means that part of the light will pass through the non-opaque layer and be lost. In this case, an additional opaque and reflective coating must be added to increase the reflection and reduce the loss of light. Please refer to FIG. 4 , which is another schematic diagram of a sheet-shaped light guiding structure. The sheet-like light guiding structure 1a includes a first light reflecting layer 10a, a light guiding sheet 2'', and a second light reflecting layer 3''. Wherein the light guide sheet 20 is located above the first light reflecting layer 10a, and the second light reflecting layer is located above the light guiding sheet 20. The first light reflecting layer 10a includes a first non-opaque layer 12a and a first reflective chill 14a. The first reflective coating 14a is applied to the first non-opaque layer 12 & outer side such that the first non-opaque layer 12a is positioned between the light guiding sheet 20 and the first reflective cooling material 14a. Further, the second light reflecting layer 30a includes a second non-opaque layer 3 to be combined with the second reflective paint 34a. The second reflective coating 34a is applied to the second non-nine 9
於本實施例中 M332171 透明層32a外侧，使得第二非不透明層32a位於導光片20與 第二反光塗料34a之間。 舉例來說，第一反光塗料14a與第二反光塗料34a可 為白漆或其他反光塗料，其可藉由喷塗方式分別塗佈於第 一非不透明層12a與第二非不透明層32a外側。惟須注意 的是，第一反光塗料14a與第二反光塗料34a分別塗佈於 第一非不透明層12a與第二非不透明層32a外侧，係為酉己 合片狀導光結構1目前可行的製程方式，若於技術層面許 可的情況下，第一反光塗料14a與第二反光塗料34a亦可 分別位於第一非不透明層12a與第二非不透明層32a内 側，使得第一反光塗料14a位於第一非不透明層i2a與導 光片20之間，第二反光塗料34a位於第二非不透明層32a 與設置於導光片20之間。 接著請參考圖5，係為本創作之片狀導光結構搭配正向 型發光二極體之示意圖。為了使導光片2〇内的光線能順^ 由按鍵99位置射出，導光片20於按鍵99之相對應位置包括 折射部22，小型發光體96之光線可經由導光片2〇之折射 22折射後以照亮複數按鍵99。 " , 斫射部22係為複數開孔，行經導光片 =_開孔時產生折射，引導光線朝向所需= 文鍵"，其光線行徑路線如圖5之箭頭方向所示。 線折^射Μ2除了為開孔之外，亦可為其他結構以達成光 、、之目的。以下舉出兩種不同形式之折射部： M332171 (1) 折射部包括折射塗料。舉例來說，可在透明之導光 片20上以特殊排列方式印刷白色圓點，使得光線於折射部 • 產生光阻’光線便從折射部折射至按鍵99方向。 (2) 折射部係為複數槽口，其係為斜向（如呈v字形）且 •未貫穿之槽口，亦可將光線折射至按鍵99方向。 - 藉由上述構造，小型發光體96之光線可經由設置於第 一反光層10與第二反光層30之間的導光片20進行傳遞，光 線於導光片20之折射部22折射至複數按鍵99，以均勻照亮 _ 複數按鍵99。在傳遞光線的過程中，本創作之片狀導光結 構可將光線的損耗降至最低。 本創作之片狀導光結構可適用於搭配正向發光型或側 向發光型之發光二極體。請參考圖5，係為本創作之片狀導 光結構搭配正向發光型發光二極體之示意圖。於本實施例 中小型發光體96a係為正向發光型發光二極體，其出光方 向如箭頭所示，光線係從小型發光體96a上方射出。小塑發 ，體96a穿過第一反光層1〇，將光線直接導入導光片，而 • It由與導光片2G相鄰接之第—反光層1G與第二反光層獅 射作用，使知光線的散失降至最低。在導光片20内傳遞 • 光線ϋ卩伤於折射部22之位置折射以照亮複數按鍵99， 剩餘光線則沿著導光片20繼續傳遞。 U，參考圖6,係為本創作之片狀導光結構搭配侧向發光 里發光二極體之示意圖。於本實施例中，小型發光體96b 係為尺寸較高之側向發光型發光二極體，其出^方向如箭 =所示，光線係從小型發光體96b右方射出。片&導光結構 包括第一反光層l〇b、導光片20與第二反光層3〇,為配合 11 M332171 尺寸較高之小型發光體96b，第一反光層l〇b較厚，使其配 合小型發光體96b之出光位置。小型發光體96b將光線導入 導光片20,而藉由與導光片20相鄰接之第一反光層l〇b與第 二反光層3〇的反射作用，使得光線的散失降至最低。在導 光片20内傳遞之光線，部分於折射部22位置折射並照亮按 鍵99，剩餘光線則沿著導光片20繼續傳遞。 ;上返各貫施例中，第二反光層30與按鍵99係分 鄰之兩部份。惟須注4的是，亦可將第二反光_In the present embodiment, M332171 is outside the transparent layer 32a such that the second non-opaque layer 32a is located between the light guide sheet 20 and the second reflective paint 34a. For example, the first reflective coating 14a and the second reflective coating 34a may be white lacquer or other reflective coating, which may be separately applied to the outside of the first non-opaque layer 12a and the second non-opaque layer 32a by spraying. It should be noted that the first reflective coating 14a and the second reflective coating 34a are respectively coated on the outer side of the first non-opaque layer 12a and the second non-opaque layer 32a, which is currently feasible for the sheet-like light guiding structure 1 In the process mode, if the technical level permits, the first reflective coating 14a and the second reflective coating 34a may also be located inside the first non-opaque layer 12a and the second non-opaque layer 32a, respectively, so that the first reflective coating 14a is located at the first Between a non-opaque layer i2a and the light guide sheet 20, the second reflective paint 34a is located between the second non-opaque layer 32a and the light guide sheet 20. Next, please refer to FIG. 5, which is a schematic diagram of the strip-shaped light guiding structure of the present invention combined with a forward-type light-emitting diode. In order to enable the light in the light guide 2 to be emitted from the position of the button 99, the light guide 20 includes a refracting portion 22 at a corresponding position of the button 99, and the light of the small illuminator 96 can be refracted through the light guide 2 22 is refracted to illuminate the plural button 99. " , 斫 部 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 In addition to the opening, the line folding 2 can also be used for other purposes to achieve light and purpose. Two different forms of refraction are given below: M332171 (1) The refraction includes a refractive coating. For example, white dots may be printed on the transparent light guide 20 in a special arrangement such that light is incident on the refracting portion. The light is refracted from the refractive portion to the direction of the button 99. (2) The refracting section is a plurality of notches that are oblique (eg, v-shaped) and • not pierced, and can refract light to the direction of button 99. With the above configuration, the light of the small illuminator 96 can be transmitted through the light guide sheet 20 disposed between the first light reflecting layer 10 and the second light reflecting layer 30, and the light is refracted to the plural portion of the refracting portion 22 of the light guiding sheet 20. Press button 99 to evenly illuminate _ plural button 99. In the process of transmitting light, the created sheet-shaped light guiding structure minimizes the loss of light. The sheet-shaped light guiding structure of the present invention can be applied to a light-emitting diode of a forward light-emitting type or a lateral light-emitting type. Please refer to FIG. 5, which is a schematic diagram of the strip-shaped light guiding structure of the present invention combined with a forward-emitting light-emitting diode. In the present embodiment, the small-sized illuminator 96a is a forward-emission type light-emitting diode, and the light-emitting direction is as indicated by an arrow, and the light is emitted from above the small-sized illuminator 96a. The small plastic hair, the body 96a passes through the first light reflecting layer 1〇, and the light is directly introduced into the light guiding sheet, and • It is caused by the first reflective layer 1G adjacent to the light guiding sheet 2G and the second reflective layer. Minimize the loss of light. Passing in the light guide sheet 20 • The light is punctured at the position of the refracting portion 22 to illuminate the plurality of buttons 99, and the remaining light is continuously transmitted along the light guide sheet 20. U, referring to FIG. 6, is a schematic diagram of the sheet-shaped light guiding structure of the present invention and the lateral light-emitting diode. In the present embodiment, the small-sized illuminator 96b is a laterally illuminating light-emitting diode having a relatively high size, and the light-emitting direction is as shown by the arrow =, and the light is emitted from the right side of the small-sized illuminator 96b. The sheet & light guiding structure comprises a first light reflecting layer 10b, a light guiding sheet 20 and a second light reflecting layer 3〇, and is matched with a small illuminating body 96b of a size of 11 M332171, the first reflecting layer 10b is thick, It is adapted to match the light exiting position of the small illuminator 96b. The small illuminator 96b introduces light into the light guide sheet 20, and the light reflection loss is minimized by the reflection of the first light reflecting layer 10b and the second light reflecting layer 3'' adjacent to the light guiding sheet 20. The light transmitted in the light guide sheet 20 is partially refracted at the position of the refracting portion 22 and illuminates the button 99, and the remaining light is continuously transmitted along the light guide sheet 20. In the above embodiments, the second light reflecting layer 30 and the button 99 are in two parts. Only note 4 is that the second reflection can also be
99合併為同一層，亦即第二反光層3〇除了作為反” ' 外，同時亦可作為使用者直接接觸之按鍵。‘、、、、’之用 於二結構’係將導光片設置 於-汉柄之間’措由—反光層以利聚光 本身的導光特性，以便將發散於空氣中 曰、光片 低’並可增加光線沿著導光片之傳遞距離， 果。此外，可藉㈣變反光叙厚度 效 寸之小型發光體。 π於搭配不同尺 綜上所陳，本創作無論就目的、手 顯示其迥異於習知技術之特徵。惟須注咅，I效，在在均 為例示性說明本創作之原理及其功戈/思，上述實施例僅 =。本創作之權利保護範圍應二== 【圖式簡單說明】 圖1係先前技術之導光結構示意圖。99 is merged into the same layer, that is, the second reflective layer 3 is not only used as an anti-", but also can be used as a button for direct contact with the user. ',,,, 'for the two structures' is to set the light guide Between the - handles - the reflection layer to concentrate the light guiding characteristics of the light itself, so as to divergence in the air, the light sheet is low, and can increase the transmission distance of the light along the light guide sheet. You can borrow (4) a small illuminator that is reflective and reflective in thickness. π is used in combination with different scales. This creation is different from the characteristics of conventional technology in terms of purpose and hand. The above embodiments are merely illustrative of the principles of the present invention and the above-mentioned embodiments are only =. The scope of protection of the present invention should be two == [Simplified description of the drawings] Figure 1 is a schematic diagram of the light guiding structure of the prior art .