201007088 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種導光裝置及其應用之發光裝置。 【先前技術】 在一些電子產品中，常要使用導光柱來控制光源發出 之光線。在這些導光柱中，常採用拋光塑膠鏡作為反射鏡 來改變光線傳播方向。但是，由於塑膝本身材質與顏色等 因素之影響，使得反射鏡之反射率不高，許多光能被吸收， ❹因此不僅導致出光亮度不高，而且還會產生發熱問題。 【發明内容】 有鑒於此，有必要提供一種出光效率高之導光裝置及 其應用之發光裝置。201007088 IX. Description of the Invention: [Technical Field] The present invention relates to a light guiding device and a lighting device therefor. [Prior Art] In some electronic products, a light guide bar is often used to control the light emitted by the light source. In these light guides, a polished plastic mirror is often used as a mirror to change the direction of light propagation. However, due to the influence of the material and color of the knee, the reflectivity of the mirror is not high, and many light energy is absorbed, so that not only the brightness of the light is not high, but also the heat generation problem. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a light guiding device having high light extraction efficiency and a light emitting device to which the same is applied.
一種導光裝置，其包括一具有鋸齒結構之入射面、一 反射面及-出射面。所述入射面、反射面及出射面依次首 尾相接戶斤述反射面為一曲面。所述入射面包括至少兩個 用於將入射光線折射至所述反射面之斜面，每兩個斜面之 =通過-連接㈣行連接’且所述斜面之面積大於所述連 接面之面積。從所述出射面指向所述反射面之視角看，所 述至少兩個斜面向所述導光裝置内部傾斜。 置。：=裝置’其包括至少一個具有光源及-導光裝 述導光裝置包括-具有鑛齒結構之 面及一出射面。斛汁汉对 接。所述反射面為二 射面及出射面依次首尾相 將入…所述入射面包括至少兩個用於 ， '·'射至所述反射面之斜面，每兩個斜面之間通 6 201007088 ^連接面進行連接，且所述斜面之面積大於所述連接面 積從所述出射面指向所述反射面之視角看，所述至 .t兩個斜面向所料光I置内部傾斜。所述光源設於所述 .v光裝置之入射面之側方，用力向所述導光裝置發射光線。 相較於先前技術，所述導光裝置及其應用之發光裝置 在所述入射面設置至少兩個向導光裝置内部傾斜之斜面， 並設置反射面為曲面，以提高大部分光線進入所述反射面 之入射角，從而使從所述反射面反射到所述出射面之反射 ©光增加，提高了出光效率。 【實施方式】 下面將結合附圖，舉以下較佳實施方式並配合圖式詳 細描述如下。 請參閱圖1至圖3,為本發明第一實施方式提供之導 光裝置1。該導光裝置1為透光材料製成之類三角形棱柱， 其包括一入射面10、一反射面12及一出射面14。所述入 射面10、反射面12及出射面14依次首尾相接。 Ο 所述入射面10連接在所述出射面14與反射面12之 間，與所述出射面14大致垂直，並與所述反射面12呈一 傾角。所述入射面10上設置有鋸齒結構，其包括至少兩個 用於將入射光線折射至所述反射面12之斜面。在本實施方 式中，所述入射面10包括四個斜面1〇〇、1〇2、1〇4、1Q6。 所述四個斜面100、102、104、106之間通過連接面1〇1、 103、105進行連接，且每個斜面之面積大於所述連接面之 面積。所述從所述出射面14指向所述反射面12之視角看， 所述四個斜面100、102、104、106向所述導光裝置^内部 7 201007088 傾斜。該四個斜面l〇〇、l〇2、l〇4、1〇6可使與之成正入射 角之入射光線經其折射至所述反射面12之入射角大於該 入射光線未經折射直接到所述反射面12之入射角。所述正 .入射角是指位於介面法線左側之入射光線所具有之入射 角。反之，則為負入射角。請參閱圖3，一與斜面1〇4成 正入射角之光線L1，其經斜面104折射至所述反射面12 之入射角cxl大於其未經折射直接到該反射面12之入射角 。先前技術中，一般將光源正對導光裝置之入射面設 β置。因此使用具有鋸齒結構之入射面1〇之導光裝置丄時， 可使相對於所述四個斜面100、1〇2、1〇4、1〇6具有正入射 角之入射光線多於具有負入射角之光線，從而使大部分入 射光線經該四個斜面100、102、1〇4、1〇6折射後到所述反 射面12之入射角變大，增加反射光之能量。優選地該鋸 齒結構為菲埋爾（Fresnel )結構。 所述反射面12相對於所述入射面1〇與出射面14傾斜 設置’用於將投射在該反射面12上之光線反射並從所述出 ©射面Μ射出。優選地，所述反射面12為一弧形曲面，其 曲率疋使從所述入射面10折射至該反射面12之光線相對 於該反射面12具有較大之入射角，以增加反射光。可多次 改變該反射面12之曲率，並測量對應之所述出射面“之 出光量，選取所述出射面14之出光量最大時之曲率作為該 反射面12之最終曲率。 所述出射面14為一平面，從所述入射面忉與反射面 12入射及反射之光線經由該出射面14射出。所述出射面 14亦可為一曲面或者其它形狀。 8 201007088 所述導光裝置1優選地採用透光且具有較高折射率之 樹脂、塑膠、高分子材料或者玻璃製成。 - 清參閱圖4，為本發明第二實施方式提供之導光裝置 _ 2,其與第一實施方式提供之導光裝置i之不同之處在於， 所述出射面24設有一透光之柱體26，所述出射面24上未 與所述柱體26連接之部位塗有阻光層28。從所述入射面 20進入所述導光裝置2之光線，經該入射面2〇之折射及 反射面22之反射後，從所述柱體26射出。該柱體26使該 ©導光裝置2出光面積較大，出光方向較多，能更好地起到 指示燈之作用。 請參閱圖5,為利用圖1之導光裝置i之發光裝置3， 其包括一上述導光裝置1及至少一個光源4。 所述光源4設於所述導光裝置工之入射面1〇之一侧， 該光源4發射光線至所述導光装置卫之入射面1〇。該光源 4可以為發光二極體。 、 所述光源4發出之光線被所述導光裝置i之入射面ι〇 ❹折射，其中一部分被折射至所述出射面14,另一部分被折 射至所述反射面12,並由所述反射面12反射至所述出射 面14。該光源4發出之光線最終從所述出射 相較於先前技術，所述導光裳置及其應用之=出裳置 在所述入射面設置至少兩個向導光裝置内部傾斜之斜面， 並設置反射面為曲面，以提高大部分光線進入所述反射面 之入射角，從而使從所述反射面反射到所述出射面之反 光增加，提高了出光效率。 綜上所述，本發明符合發明專利要件’爰依法提出專 201007088 利申請。惟，以上所述者僅為本發明之較佳實施方式，本 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技藝 之人士援依本發明之精神所作之等效修飾或變化，皆應涵 蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1為本發明第一實施方式提供之導光裝置立體圖； 圖2為圖1中之導光裝置之侧視圖； 圖3為圖1中之導光裝置之工作狀態示意圖； 圖4為本發明第二實施方式提供之導光裝置示意圖； 圖5為應用圖χ中之導光裝置之發光裝置示意圖。 導光裝置 【主要元件符號說明】 10,20 101,103,105 14,24 斜面 反射面 1，2 入射面 100,102,104,106 連接面 丄2,22 出射面 發光裝置 26 阻光層 3 光源 28A light guiding device comprising an incident surface having a sawtooth structure, a reflecting surface and an emitting surface. The incident surface, the reflecting surface and the emitting surface are sequentially connected end to end to form a curved surface. The entrance face includes at least two ramps for refracting incident light to the reflective face, each of the two ramps being connected by a -four (four) row and having an area greater than the area of the connector face. The at least two oblique faces are inclined toward the inside of the light guiding device from a viewing angle of the exit surface toward the reflecting surface. Set. The == device' includes at least one light source and a light directing light directing device comprising - a face having a mineral tooth structure and an exit face.斛 斛 对 对 。. The reflecting surface is a two-plane and an exiting surface, and the first and second phases are arranged in sequence. The incident surface includes at least two inclined surfaces for the '·' to be incident on the reflecting surface, and the passage between each two inclined surfaces is 6 201007088 ^ The connecting surface is connected, and the area of the inclined surface is larger than the connecting area from the perspective of the emitting surface toward the reflecting surface, and the two oblique surfaces are inclined to the inside. The light source is disposed on a side of the incident surface of the .v optical device, and strongly emits light to the light guiding device. Compared with the prior art, the light guiding device and the lighting device of the same are disposed on the incident surface with at least two inclined inclined surfaces of the guiding light device, and the reflecting surface is curved to increase most of the light entering the reflection. The angle of incidence of the surface increases the amount of reflection © reflected from the reflective surface to the exit surface, improving light extraction efficiency. [Embodiment] Hereinafter, the following preferred embodiments will be described in detail with reference to the accompanying drawings. 1 to 3, a light guiding device 1 according to a first embodiment of the present invention is provided. The light guiding device 1 is a triangular prism made of a light transmissive material, and includes an incident surface 10, a reflecting surface 12 and an emitting surface 14. The entrance surface 10, the reflection surface 12, and the exit surface 14 are sequentially connected end to end. The entrance surface 10 is connected between the exit surface 14 and the reflective surface 12, is substantially perpendicular to the exit surface 14, and is at an oblique angle to the reflective surface 12. The entrance face 10 is provided with a sawtooth structure comprising at least two ramps for refracting incident light to the reflective face 12. In the present embodiment, the incident surface 10 includes four slopes 1〇〇, 1〇2, 1〇4, 1Q6. The four inclined faces 100, 102, 104, 106 are connected by connecting faces 1, 1 , 103, 105, and the area of each inclined face is larger than the area of the connecting face. The four inclined faces 100, 102, 104, 106 are inclined toward the light guiding device interior 7 201007088 from the perspective of the exit surface 14 directed toward the reflecting surface 12. The four slopes l〇〇, l〇2, l〇4, 1〇6 can cause the incident light rays incident at a normal incident angle thereof to be refracted to the reflection surface 12 by an incident angle greater than the incident light rays being directly refracted to The incident angle of the reflecting surface 12. The positive incident angle refers to the incident angle of the incident ray located to the left of the interface normal. Otherwise, it is a negative incident angle. Referring to Fig. 3, a light ray L1 having a normal incident angle with the inclined surface 1 ,4 is refracted by the inclined surface 104 to an incident angle cxl of the reflecting surface 12 which is larger than an incident angle thereof which is not refracted directly to the reflecting surface 12. In the prior art, the light source is generally set to the incident surface of the light guiding device. Therefore, when the light guiding device 具有 having the incident surface of the sawtooth structure is used, the incident light having a normal incident angle with respect to the four inclined surfaces 100, 1〇2, 1〇4, and 1〇6 can be made more negative. The light of the incident angle is such that the incident angle of most of the incident light rays refracted through the four inclined faces 100, 102, 1〇4, and 1〇6 to the reflecting surface 12 becomes large, and the energy of the reflected light is increased. Preferably the sawtooth structure is a Fresnel structure. The reflecting surface 12 is disposed obliquely with respect to the incident surface 1 〇 and the exit surface 14 for reflecting light incident on the reflecting surface 12 and ejecting it from the exit surface. Preferably, the reflecting surface 12 is a curved curved surface whose curvature such that the light refracted from the incident surface 10 to the reflecting surface 12 has a larger incident angle with respect to the reflecting surface 12 to increase the reflected light. The curvature of the reflecting surface 12 may be changed a plurality of times, and the amount of light corresponding to the exit surface may be measured, and the curvature of the exit surface 14 may be selected as the final curvature of the reflecting surface 12. 14 is a plane through which the light incident and reflected from the entrance surface 忉 and the reflection surface 12 is emitted. The exit surface 14 may also be a curved surface or other shape. 8 201007088 The light guiding device 1 is preferably The invention is made of a resin, a plastic, a polymer material or a glass having a high refractive index and a high refractive index. - Referring to FIG. 4, a light guiding device _ 2 according to a second embodiment of the present invention is provided, which is compatible with the first embodiment. The light guiding device i is provided in that the exit surface 24 is provided with a light-transmissive cylinder 26, and the portion of the exit surface 24 that is not connected to the pillar 26 is coated with a light-blocking layer 28. The light entering the light guiding device 2 on the incident surface 20 is reflected by the refractive surface of the incident surface 2 and reflected from the reflecting surface 22, and then emitted from the column 26. The column 26 makes the light guiding device 2 The light-emitting area is large, and the light-emitting direction is more, which can better Referring to FIG. 5, the illuminating device 3 using the light guiding device i of FIG. 1 includes a light guiding device 1 and at least one light source 4. The light source 4 is disposed on the light guiding device. The light source 4 emits light to the incident surface of the light guide device. The light source 4 may be a light emitting diode. The light emitted by the light source 4 is guided by the light source 4 The incident surface ι of the optical device i is refracted, a portion of which is refracted to the exit surface 14, and another portion is refracted to the reflective surface 12 and reflected by the reflective surface 12 to the exit surface 14. 4, the emitted light is finally emitted from the exiting, compared to the prior art, the light guiding skirt and the application thereof are disposed on the incident surface, and at least two inclined surfaces of the guiding light device are inclined, and the reflecting surface is disposed. The surface is curved to increase the incident angle of most of the light entering the reflecting surface, thereby increasing the reflection from the reflecting surface to the emitting surface, thereby improving the light extraction efficiency. In summary, the invention complies with the invention patent requirement. '爰Proposed according to law 201007088 The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be able to modify the equivalent modifications according to the spirit of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a light guiding device according to a first embodiment of the present invention; FIG. 2 is a side view of the light guiding device of FIG. 1; FIG. 4 is a schematic diagram of a light guiding device according to a second embodiment of the present invention; and FIG. 5 is a schematic diagram of a light emitting device using the light guiding device in the drawing. Component symbol description] 10,20 101,103,105 14,24 Bevel reflection surface 1,2 Incidence surface 100,102,104,106 Connection surface 丄2,22 Exit surface illuminating device 26 Light blocking layer 3 Light source 28