201025388 六、發明說明： 【發明所屬之技術頜域】 [0001]201025388 VI. Description of the invention: [Technology jaw domain to which the invention belongs] [0001]
本發明是有關一種按鍵導光結構，尤指一種可提昇 按鍵部位亮度’並確保亮度均勻之導光結構。 【先前技術] 目前常見具有按鍵的電子產品（如：計算機、/_動 電話），為便於在黑夜或光線不足之環境下使用， ’多會 於其内部提供一基本之照明光源，以維持操作按韃所需 之基本照明；較傳統者，有如第1圖所示，其主要包括. —不透光的按鍵61、一導光元件6 ,以及一發光元件62， 其中發光元件62配置於按鍵61背面，而發光元件62所產 生之光線係透過圍繞於按鍵61周圍之，導光元砵6朝向按鍵 61之前方透出，藉由導光元件6之導光能力以及重新配置 發光元件62位置之手段，可使光線均勻地散佈於導光元 件6上，以達光線均勻化且避免局部亮勤的目的。 但此種結構設計不但因為發光元件62設置數量較多 而直接增加製迭成本’同時其;整:體電路設計複雜性提高 且耗能增加，並不合乎經濟效益。 04] 另有如第2圖所示之結構，其主要係於一按鍵7下方 設置一橋板72，並於該橋板72下方另間隔設置一表側與 電路板73相結合之底板71，於該橋板72與電路板73 (底 板71)之間留有一光源傳導空間761，而於該光源傳導空 間761旁側設有一發射光源76，而該橋板72於對應各按鍵 7部位分別嵌設有至少一導光部75，且該導光部75並可向 下延伸至該光源傳導空間761内；使用時，該發射光源76 097149049 表單編號 A0101 第 4 頁/共 20 頁 0972080045-0 201025388 [0005] e [0006] 所產生之光線進入光源傳導空間7 61，經由導光部7 5導引 折射而可向上射至按鍵7形成背光照明。 如第3圖所示’其係另一種應用於鍵盤結構之背光模 組’其主要包括：一基底81，一導光板（LGP)8設於該基 底81頂側’一漫射層83附接於該導光板（LGP)8頂側，以 漫射該傳輸通過該導光板（LGP)8之光線，於該漫射層83 上設有複數穿孔831 ’ 一由光線傳輸材料所形成之鍵盤矩 陣電路層84設置於該漫射層83的頂側，一由光線傳輸材 料所形成之膜層85設置於該鍵盤矩陣電路層84上表側， 且該膜層85於對應各穿孔831位置上設有複數鐘形件851 ’一覆蓋件86安裝於膜層85上表側，以及複數按鍵87設 置於覆蓋件86上對應於各穿孔831位置，以及至少一發光 二極體（LED)82 ’設置於該基底81上臨導光板（LGP)8旁 側； 使該發光二極體（LED)82之光現可經由導光板 (LGP)8橫向傳輸’並向上導入漫射層83，利用該穿孔 831可供光線向上發散，並道過鍵盤矩陣電路層84及鐘形 件851 ’最後可於按鍵87及其周側形成較佳之背光照明效 果0 [0007] 097149049 然而’上述第2、3圖各結構其皆係利用導光元件將 光線向上導引’其重點均在於如何將導光元件内之光線 向外均勻擴散而加以設計改良，但在實際應用中，於導 光元件周邊有許多元件（例如：外殼、按鍵）都有光線 反射之特性，其會將由該導光元件射出之光線再一次反 射回導光元件内，而目前此一部份之光線大多並未善加 表單編號ΑΟΙΟί . 第5頁/共20頁 0972080045-0 201025388 利用，而任其隨意漫射’此亦形成背光模組之光線照明 效率無法進·一步提昇的主要原因之一。 [0008] [0009] ❹ [0010] [0011] [0012] [0013] 097149049 有鑑於習見之導光板結構有上述缺點，發明人乃針 對該些缺點研究改進之道’終於有本發明產生。 【發明内容】 本發明之主要目的在於提供一種按鍵導光結構，其 可有效利用周侧元件反射回導光板之光線，以提昇按鍵 部位周側之照明光線’進而避免背光陰影並確保亮度均 勻。 本發明之弄一目的在於提供一種按键導光結構，其 可提昇光線利用效率，增進背光照码亮度。 為達成上述目的及功效，本發明所採行的技術手段 具有一設置於鍵盤内部之導光板，且該導光板至少具有 :—入光面，可供光線導入該導光板内部；一出光面， • ' ：丨" ,’ | 與該入光面相交，於該出先面表側可被界4:出對應於按 鍵之操作區域，於該操作區域所涵t之範圍内佈設有至 少—擴散反射單元，且於ά擴散反射單元之表面設有反 光層。 依上述結構，其中該擴散反射單元係一凸出於出光 面之弧面。 依上述結構，其中該擴散反射單元係一凹陷於出光 面之凹弧面。 為使本發8月的上述目的、功效及特徵可獲致更具體 的瞭解，茲依下列附圖說明如下： 表單編號Α0101 第6頁/共20頁 〇97208〇〇45_〇 [0014] 201025388 【實施方式】 [0015] 第一實施例 [0016] ❹ 請參第4至6圖所示，可知本創作第一實施例之結構 包括一導光板1，該導光板}具有一入光面u，以及一與 該入光面11相交之出光面12，於該導光板丨上設有至少一 通孔13對應於操作之按鍵4位置，該通孔13係可呈一上窄 下寬之錐形孔，而於該出光面丨2上之通孔13周側（對應 於各按鍵4大小）界定出一操作區域131，於該操作區域 131内均勻佈設有複數擴散反射單元14，在本實施例中， 該擴散反射單元14係為凸出於出光面12表面之凸面、凸 弧面或半球體，且於該擴散反射單元14之表面設有反光 層15 ’該反光層15可為一反光塗料。 [0017] ❹ 上述導光板1於實際應用時，可配^ —電路板2及一 導電薄膜3形成一背光模組之基本架構，該電路板2係設 於導光板1下方，其上設有電導通接點21分別對應於導光 板1之通孔13，於該電路板2對應矻導光板丨之入光面^旁 侧設有至少一光源體20 (可為發光二極體LED、冷陰極燈 管或其它發光體）’而導電薄膜3則係設於該電路板2與 導光板1之間，於該導電薄膜3上設有凸起之彈性支持部 31對應於導光板1之各通孔13 (亦同時對應於電路板2之 電導通接點21)，使彈性支持部31可通過各通孔13而向 上與導光板1另一側（上方）之按鍵4相抵觸結合，且於 該彈性支持部31内容納有一導觸點（圖未示），該彈性 支持部31所具有的彈性機制，係容許該按鍵4受外力之了 壓操作時產生一變形量，使該導觸點可與電路板2之電導 097149049 表單編號A0101 第7頁/共20頁 0972080045-0 201025388 [0018] e ❹ [0019] [0020] 通接點21接觸形成電氣導通，並於該操作按鍵4之外力消 失時，利用該彈性支持部31變形之彈性驅使導觸點回復 至原位’同時殼蓋5可蓋合於導光板丨上方及各按鍵4 以外之部位（如第4、5圖所示）； 使用時，光源體20所產生之光線經由入光面u導入 該導光板1内，可於導光板丨内被導引擴散，並使大部份 之光線由出光面12導出，以於各按鍵4周側及殼蓋5上透 光部位形成適當之背光效果，另有部份光線會橫向傳輸 至通孔13旁侧，利用該通孔13呈錐形之斜面而可將光線 向上導引，以增進該按鍵4周側之背光照明效果（如第6 圖所示）；然而’上述之背光照明光線有一部份會由殼 蓋5内表面或按鍵4下表面反射回導光板丨表面而由於各 擴散反射單元14係分別設置於各通孔13周侧（即各按鍵4 下方），且係呈凸出於該出光面12表面之弧面或半球體 形狀，加以其表面反光層15之反光作用，可使部份反射 至該擴散反射單元14表面4光線再向上反射至各按鍵4及 其周側，如此，除了可有效避免於按鍵4及其周側產生陰 影之外，亦可充份利用光源體2所產生之光線，以提昇光 線利用效率。 第二實施例 另請參第7、8圖，可知本創作第二實施例之導光板 10具有與前述第一實施例之導光板丨相同之入光面u、出 光面12及通孔13等基本結構，其差異乃在於：導光板1〇 於出光面12上各通孔13周緣之操作區域131内佈設有至少 一擴散反射單元104，於本實施例中，該擴散反射單元 097149049 表單編號A0101 第8頁/共20頁 0972080045-0 201025388 104乃係凹陷於出光面12表面之凹坑、凹弧面或半球狀凹 孔’且於各擴散反射單元1〇4表面設有反光層1〇5，該反 光層Μδ可為一反光塗料； [0021] Ο [0022] ❹ [0023] [0024] [0025] [0026] 上述導光板10可如第一實施例般地設置於導電薄联3 與各按鍵4之間，且由入光面11接受光源體20所產生之光 線，當導光板10内之光線由出光面12 (或錐形之通孔j 3 内表面）向上導出後，部份光線受到殼蓋6或按鍵5内表 面之阻擋而向下反射，藉由上述擴散反射單元1〇4凹陷於 出光面12表面之凹坑、凹弧面或半球狀凹孔的形狀，配 合該反光層105冬反光作用，可使上述向下反射至擴散反 射單元104表面之光線，再向上反射至各按_4及其周侧 ，以達到類似於第一實施例之反射及擴散效|，適足以 減少先線之損失，提高背光之明亮度。 综合g上所述，本發明按鍵導光結構確可達成加強 按鍵部位亮度’避免陰影彦生之功效，實夸-具新穎性 及非顯而易知性之發明，爰依法提出申請發明專利；惟 上述說明之内容，僅德本發明之較隹實施例說明 ，舉凡 依本發明之技術手段與範疇所延伸之變化、修飾、改變 或等效置換者，亦皆應落入本發明之專利申請範圍内。 【圖式簡單說明】 第1圖係一習見按鍵部位之背光結構說明圖。 第2圖係另一習見按鍵部位之背光結構說明圖。 第3圖係又一習見按鍵部位之背光結構說明圖。 第4圖係本發明第一實施例之構造分解圖。 097149049 表單編號A0101 第9頁/共20頁 0972080045-0 201025388 [0027]The present invention relates to a push button light guiding structure, and more particularly to a light guiding structure which can improve the brightness of a button portion and ensure uniform brightness. [Prior Art] At present, electronic products with buttons (such as computer, /_mobile phone) are commonly used. In order to facilitate use in the night or under-light environment, 'more will provide a basic illumination source inside to maintain operation. The basic illumination required for pressing ;; more conventionally, as shown in FIG. 1 , which mainly includes: an opaque button 61 , a light guiding element 6 , and a light emitting element 62 , wherein the light emitting element 62 is disposed on the button The back side of the 61, and the light generated by the light-emitting element 62 is transmitted around the periphery of the button 61, and the light guide element 6 is exposed to the front of the button 61, and the light guiding capability of the light guiding element 6 and the position of the light-emitting element 62 are reconfigured. The method can evenly distribute the light on the light guiding element 6 to achieve uniformity of the light and avoid the purpose of partial brightening. However, such a structural design not only directly increases the cost of fabrication due to the large number of light-emitting elements 62 disposed at the same time; the complexity of the overall circuit design is increased and the energy consumption is increased, which is not economical. 04] Further, as shown in FIG. 2, a bridge 72 is disposed under a button 7, and a bottom plate 71, which is combined with the circuit board 73, is disposed at a distance below the bridge 72. A light source conducting space 761 is disposed between the board 72 and the circuit board 73 (the bottom plate 71), and a light emitting source 76 is disposed on the side of the light source conducting space 761, and the bridge board 72 is respectively embedded in the corresponding button 7 portions. a light guiding portion 75, and the light guiding portion 75 can extend downward into the light source conducting space 761; in use, the emitting light source 76 097149049 Form No. A0101 Page 4 of 20 9772080045-0 201025388 [0005] e [0006] The generated light enters the light source conduction space 7 61, and is guided to refract via the light guiding portion 75 to be incident on the button 7 to form backlight. As shown in FIG. 3, 'the other backlight module applied to the keyboard structure' mainly includes: a substrate 81, a light guide plate (LGP) 8 is disposed on the top side of the substrate 81, and a diffusing layer 83 is attached. On the top side of the light guide plate (LGP) 8, the light transmitted through the light guide plate (LGP) 8 is diffused, and a plurality of perforations 831' are provided on the diffusing layer 83. A keyboard matrix formed by a light transmitting material The circuit layer 84 is disposed on the top side of the diffusing layer 83. A film layer 85 formed of a light transmitting material is disposed on the front side of the keyboard matrix circuit layer 84, and the film layer 85 is disposed at a position corresponding to each of the through holes 831. A plurality of bells 851' are mounted on the front side of the film layer 85, and a plurality of buttons 87 are disposed on the cover member 86 corresponding to the positions of the respective through holes 831, and at least one light emitting diode (LED) 82' is disposed thereon. The substrate 81 is adjacent to the side of the light guide plate (LGP) 8; the light of the light emitting diode (LED) 82 is now laterally transmitted through the light guide plate (LGP) 8 and is introduced upward into the diffusing layer 83, by which the through hole 831 can be used. For the light to diverge upwards, and pass the keyboard matrix circuit layer 84 and the bell 851 'finally The button 87 and its peripheral side form a better backlighting effect. [0007] 097149049 However, each of the above structures 2 and 3 uses a light guiding element to guide the light upwards. The focus is on how to place the light guiding element. The light is uniformly spread outward and is designed and improved. However, in practical applications, there are many components (for example, the outer casing and the button) around the light guiding element, which have the characteristic of light reflection, which will emit light from the light guiding element. One reflection back into the light-guide element, and most of the current part of the light is not well-formed with the form number ΑΟΙΟί. Page 5 of 20 pages 0972080045-0 201025388 use, and let it randomly diffuse 'this also forms a backlight mode One of the main reasons why the lighting efficiency of the group cannot be improved. [0009] [0013] [0013] [0013] 097149049 In view of the above-mentioned shortcomings of the light guide plate structure, the inventors have studied the improvement of these shortcomings. Finally, the present invention has been produced. SUMMARY OF THE INVENTION The main object of the present invention is to provide a button light guiding structure which can effectively utilize the light reflected from the peripheral side element back to the light guide plate to enhance the illumination light on the peripheral side of the button portion, thereby avoiding backlight shadow and ensuring uniform brightness. An object of the present invention is to provide a button light guiding structure, which can improve light utilization efficiency and improve backlight brightness. In order to achieve the above object and effect, the technical means adopted by the present invention has a light guide plate disposed inside the keyboard, and the light guide plate has at least: a light incident surface for introducing light into the light guide plate; • ' :丨" ,' | intersects the illuminating surface, and the boundary surface can be bounded by 4: the operating area corresponding to the button, and at least the diffuse reflection is arranged within the range of t The unit is provided with a reflective layer on the surface of the ά diffuse reflection unit. According to the above structure, the diffuse reflection unit is protruded from the curved surface of the light exiting surface. According to the above structure, the diffuse reflection unit is recessed on the concave curved surface of the light exit surface. In order to obtain a more specific understanding of the above objectives, effects and features of the August issue, the following figures are explained as follows: Form No. Α0101 Page 6 of 20 〇97208〇〇45_〇[0014] 201025388 [ [0015] The first embodiment [0016] ❹ Referring to FIGS. 4 to 6, it can be seen that the structure of the first embodiment of the present invention includes a light guide plate 1 having a light incident surface u. And a light-emitting surface 12 intersecting the light-incident surface 11 , wherein the light-guiding plate is provided with at least one through hole 13 corresponding to the position of the operated button 4 , and the through hole 13 can be a narrow hole with a narrow width An operation area 131 is defined on the peripheral side of the through hole 13 (corresponding to the size of each button 4) on the light-emitting surface 2, and a plurality of diffusion reflection units 14 are uniformly disposed in the operation area 131, in this embodiment. The diffuse reflection unit 14 is a convex surface, a convex curved surface or a hemisphere protruding from the surface of the light-emitting surface 12, and a reflective layer 15 is disposed on the surface of the diffuse reflection unit 14. The reflective layer 15 can be a reflective paint. [0017] ❹ In the practical application, the light guide plate 1 can be configured to form a basic structure of a backlight module, and the circuit board 2 is disposed under the light guide plate 1 and is provided thereon. The electrical conduction contacts 21 respectively correspond to the through holes 13 of the light guide plate 1 , and at least one light source body 20 is disposed on the side of the light incident surface of the circuit board 2 corresponding to the light guide plate ( (which may be a light emitting diode LED, cold a cathode lamp tube or other illuminator) and a conductive film 3 is disposed between the circuit board 2 and the light guide plate 1. The elastic support portion 31 provided with a protrusion on the conductive film 3 corresponds to each of the light guide plates 1. The through hole 13 (also corresponding to the electrical conduction contact 21 of the circuit board 2) allows the elastic support portion 31 to be inwardly coupled to the button 4 on the other side (upper side) of the light guide plate 1 through the through holes 13 and A guide contact (not shown) is disposed in the elastic support portion 31. The elastic support portion 31 has an elastic mechanism for allowing the button 4 to generate a deformation amount when the external force is pressed, so that the guide is touched. Point can be electrically connected to circuit board 2 097149049 Form No. A0101 Page 7 / Total 20 pages 0972080045-0 201025 [0018] e ❹ [0020] [0020] The contact point 21 contacts to form electrical conduction, and when the external force of the operation button 4 disappears, the elastic deformation of the elastic support portion 31 drives the conduction contact back to the original position' At the same time, the cover 5 can be attached to the upper portion of the light guide plate and the portions other than the buttons 4 (as shown in FIGS. 4 and 5); when used, the light generated by the light source body 20 is introduced into the light guide plate through the light incident surface u. The inner light guide plate can be guided and diffused in the light guide plate, and a large part of the light is led out from the light exit surface 12 to form an appropriate backlight effect on the four sides of each button and the light transmitting portion on the cover 5, and another portion. The light is transmitted laterally to the side of the through hole 13 , and the through hole 13 has a tapered slope to guide the light upward to enhance the backlighting effect of the four sides of the button (as shown in FIG. 6 ); However, a part of the above backlight illumination light is reflected from the inner surface of the cover 5 or the lower surface of the button 4 back to the surface of the light guide plate, and each of the diffusion reflection units 14 is disposed on the circumferential side of each of the through holes 13 (ie, each button 4) Bottom), and is a curved surface or hemisphere protruding from the surface of the light-emitting surface 12 The shape of the body is reflected by the surface of the reflective layer 15 to partially reflect the light reflected on the surface 4 of the diffuse reflection unit 14 to the respective buttons 4 and its peripheral side, so that the button 4 can be effectively avoided. In addition to the shadow on the side of the circumference, the light generated by the light source body 2 can also be fully utilized to improve the light utilization efficiency. The second embodiment is also shown in FIGS. 7 and 8. It can be seen that the light guide plate 10 of the second embodiment of the present invention has the same light incident surface u, light exit surface 12, through hole 13 and the like as the light guide plate 第一 of the first embodiment. The basic structure is different in that the light guide plate 1 is disposed in the operation area 131 of the periphery of each of the through holes 13 on the light-emitting surface 12, and at least one diffusion reflection unit 104 is disposed. In the embodiment, the diffusion reflection unit 097149049 is in the form number A0101. Page 8 / 20 pages 0972080045-0 201025388 104 is a concave, concave curved surface or hemispherical concave hole recessed on the surface of the light-emitting surface 12 and is provided with a reflective layer 1〇5 on the surface of each diffusion reflection unit 1〇4. The reflective layer Μδ can be a reflective coating; [0021] ❹ [0024] [0025] [0025] [0025] The light guide plate 10 can be disposed on the conductive thin film 3 as in the first embodiment Between each of the buttons 4, the light generated by the light source body 20 is received by the light incident surface 11, and the light in the light guide plate 10 is led upward from the light exit surface 12 (or the inner surface of the tapered through hole j3). The light is reflected downward by the cover 6 or the inner surface of the button 5, by the above diffusion The unit 1〇4 is recessed in the shape of a pit, a concave curved surface or a hemispherical concave hole on the surface of the light-emitting surface 12, and the light reflecting effect of the reflective layer 105 on the surface of the diffusing reflection unit 104 can be reflected downward. Reflecting upwards to each of _4 and its circumference to achieve reflection and diffusion effect similar to the first embodiment, it is sufficient to reduce the loss of the first line and improve the brightness of the backlight. According to the above, the button light guiding structure of the invention can achieve the effect of strengthening the brightness of the button part, avoiding the effect of the shadow Yan Yan, real boasting - novelty and non-obvious and easy to know, and applying for invention patent according to law; The above description of the present invention is only to be construed as illustrative, and variations, modifications, alterations, or equivalent substitutions of the technical means and scope of the present invention are also intended to fall within the scope of the present invention. Inside. [Simple description of the drawing] Fig. 1 is a diagram showing the backlight structure of the button portion. Fig. 2 is an explanatory view of another backlight structure of a button portion. Fig. 3 is a further explanatory view of the backlight structure of the button portion. Fig. 4 is an exploded perspective view showing the first embodiment of the present invention. 097149049 Form No. A0101 Page 9 of 20 0972080045-0 201025388 [0027]
第5圖係本發明第一實施例之組合剖面圖。 [0028] 第6圖係本發明第 一實施例之光線散射示意圖。 [0029] 第7圖係本發明第 二實施例之組合剖面圖。 [0030] 第8圖係本發明第 二實施例之光線散射示意圖。 【主要元彳牛符號說明】 [0031] 1、10----導光板 62----發光元件 [0032] 11...入光面 71----底板 [0033] 12...出光面 72....橋板 [0034] 13...通孔 75....導光部 [0035] 131·..操作區域 761....光源傳導空間 [0036] 14、104..擴散反射單元 76. · ·.發射光源 [0037] 15、105..反光層 8——.導光板 [0038] 20...光源體 81.，..基底 [0039] 2、73....電路_ 82.· ...發光二極體 [0040] 21...電導通接點 83____漫射層 [0041] 3____導電薄膜 831...穿孔 [0042] 31.....彈性支持部 84.·..鍵盤矩陣電路層 [0043] 4 ' 61 ' 7 ' 87/----按鍵 85....膜層 [0044] 5....殼蓋 851...鐘形件 [0045] 6____導光元件 86----覆蓋件 表單煸號A0101 第1〇頁/共20頁 097149049 0972080045-0Fig. 5 is a sectional view showing the combination of the first embodiment of the present invention. Figure 6 is a schematic diagram of light scattering in accordance with a first embodiment of the present invention. Figure 7 is a sectional view showing the combination of the second embodiment of the present invention. Figure 8 is a schematic diagram of light scattering in accordance with a second embodiment of the present invention. [Main Elementary Yak Symbol Description] [0031] 1, 10----Light Guide Plate 62----Light-emitting Element [0032] 11... Light-in Surface 71----Backplane [0033] 12... Light-emitting surface 72....bridge [0034] 13...through hole 75....light guide [0035] 131·.. operation area 761....light source conduction space [0036] 14,104. Diffuse reflection unit 76. · ·. Emitter light source [0037] 15, 105.. Reflective layer 8 - Light guide plate [0038] 20... Light source body 81.,.. Base [0039] 2, 73.. .. Circuit _ 82.·...Light Emitting Diode [0040] 21... Electrical Conduction Contact 83____ Diffuse Layer [0041] 3____ Conductive Film 831...Perforated [0042] 31.... Elastic support portion 84... keyboard matrix circuit layer [0043] 4 ' 61 ' 7 ' 87/----button 85....film layer [0044] 5....shell cover 851... Bell-shaped member [0045] 6____ Light-guiding element 86----covering form nickname A0101 Page 1 of 20/Total 20 pages 097149049 0972080045-0