201213734 六、發明說明： 【發明所屬之技術領域】 本發明係有關一種導光柱，特別是關於一種使光線 均勻出射的導光柱。 【先前技術】 近年來，使s led裝置的技術曰漸成熟，亮度也 曰益提升，已具有商業利用價值。但是由於LED近似 點光源容易形成眩光現象，尤其在高功率LED的應用 上，更容易造成使用者的眼睛不適。此外，LED的發光 角度約在⑽度以内，因此，比起白熾燈及鹵素燈，哪 燈的光線較集中在前方，側向的照射極不均勻，光照空 間較小。這些因素不利於LED的應用，因此有加以改 良的需求。 【發明内容】 本發明的目的，在於提出一種使光線均句出射的導 先柱，特別是在led燈上的應用。 ，據本發明’-種使光線均句出射的導光柱包含透 光人射圓錐柱的錐底連接該透光圓柱之一端， 另=射面’以及光出射球體連接該透光圓柱之 著今入4·/、有丄圓錐狀凹孔，該圓錐狀凹孔的錐角正對 由該入射面進入該導光柱内，然後從 先出射球體均勻射出，因而產生均勻的光照。 201213734 根據本發明，一種應用該導光柱的led燈包含led · 設置於該入射面處且正對著該導光柱。 【實施方式】 圖1係本發明導光柱10的側視圖，圖2、3係導光 柱10在不同視角下的立體圖。導光柱1〇具有透光圓柱 12、光入射圓錐柱14、光出射球體16。透光圓柱12連 接光入射圓錐柱14的錐底，入射圓錐柱14的錐頂具有 入射面18 ’較佳者，入射面18為碗狀曲面，其内可設 置光源。在其他實施例中，入射面18為平面，光源可 直接設置於入射面18下方。透光圓柱12的另—端連接 光出射球體16，光出射球體16上具有圓錐狀凹孔2〇， 圓錐狀凹孔20的錐角正對著入射面18。為了讓導光柱 10能夠與其他裝置結合在一起，可在入射面18之一側 設置定位部22供固定在其他裝置上，例如電路板或燈 頭。 導光柱10為透明材料製成，例如玻璃、透明塑膠 或透明樹脂。而透明塑膠例如聚曱基丙烯酸甲酉旨 (Polymethylmethacrylate，簡稱 PMMA，俗稱做壓克力 或有機玻璃）、聚碳酸S旨（Polycarbonate，簡稱pc)， 透明樹脂例如環氧樹脂、聚對苯二甲酸乙二酉旨 (Polyethylene terephthalate，簡稱 PET )。若是有顏色 上的需求可於該透明材料中加入顏料，或是於導光柱 10定形後，塗佈透明顏料於導光柱10之外表面。 201213734 在使用時，例如圖4所示，導光柱10之外表面為 粗糙表面，設置LED 26於碗狀曲面的入射面18下方， 其光線經入射面18進入導光柱10内，被光入射圓錐柱 14、透光圓柱12及光出射球體16散射成為出射光。， 可將。到達圓錐狀凹孔20的光線大部份被圓錐狀凹孔 20反射再散射，因此不但消除了 LED的眩光現象，而 且提高側向的光照。 在另一實施例中，光入射圓錐柱14之錐面24塗佈 或鍍上高反射率的反射材質，入射的光線經錐面24形 成的反射面反射，因而被導往透光圓柱12。 在另一實施例中，如圖5所示，於圓錐狀凹孔20 的表面塗佈或鍍上高反射率的反射材質，經透光圓柱 12到達光出射球體16的光線，被圓錐狀凹孔20形成 的反射面反射，因而全部成為側向的光照。 【圖式簡單說明】 圖1係本發明導光柱的側視圖； 圖2、3係圖1的導光柱在不同視角下的立體圖； 圖4係應用本發明導光柱的LED燈的剖視圖；以 及 圖5係應用本發明另一導光柱的LED燈的剖視圖。 【主要元件符號說明】 10 導光柱 201213734201213734 VI. Description of the Invention: [Technical Field] The present invention relates to a light guiding column, and more particularly to a light guiding column for uniformly emitting light. [Prior Art] In recent years, the technology of the s-led device has gradually matured, and the brightness has also been greatly improved, which has commercial value. However, since the LED approximate point light source is prone to glare, especially in the application of high power LED, it is more likely to cause eye discomfort to the user. In addition, the LED has an illumination angle of about (10) degrees. Therefore, compared with incandescent lamps and halogen lamps, the light of the lamp is concentrated in the front, and the lateral illumination is extremely uneven, and the illumination space is small. These factors are not conducive to the application of LEDs, so there is a need to improve them. SUMMARY OF THE INVENTION It is an object of the present invention to provide a pilot column for emitting light across a sentence, particularly for use on a led lamp. According to the invention, the light guide column that emits the light uniform sentence includes a cone bottom of the light-transmitting human cone, and one end of the light-transmitting cylinder is connected to the light-emitting cylinder, and the light-emitting sphere is connected to the light-emitting cylinder. Into the 4·/, there is a conical concave hole, the cone angle of the conical concave hole directly enters the light guide column from the incident surface, and then uniformly emitted from the first exiting sphere, thereby generating uniform illumination. 201213734 According to the present invention, a LED lamp using the light guide column includes a LED disposed at the incident surface and facing the light guide column. [Embodiment] Fig. 1 is a side view of a light guiding rod 10 of the present invention, and Figs. 2 and 3 are perspective views of the light guiding rod 10 at different viewing angles. The light guide column 1 has a light transmitting cylinder 12, a light incident cone 14, and a light exiting sphere 16. The light-transmissive cylinder 12 is connected to the cone bottom of the light incident cone 14, the cone top of the entrance cone 14 has an entrance surface 18', and the entrance surface 18 is a bowl-shaped curved surface in which a light source can be disposed. In other embodiments, the entrance face 18 is planar and the light source can be disposed directly below the entrance face 18. The other end of the light-transmissive cylinder 12 is connected to the light-emitting sphere 16, and the light-emitting sphere 16 has a conical recess 2〇, and the cone-shaped recess 20 has a taper angle facing the incident surface 18. In order to allow the light guiding rod 10 to be combined with other devices, a positioning portion 22 may be provided on one side of the incident surface 18 for attachment to other devices such as a circuit board or a lamp head. The light guide column 10 is made of a transparent material such as glass, transparent plastic or transparent resin. Transparent plastics such as Polymethylmethacrylate (PMMA, commonly known as acrylic or plexiglass), Polycarbonate (PC), transparent resins such as epoxy resin, polyterephthalic acid Polyethylene terephthalate (PET). If there is a color requirement, a pigment may be added to the transparent material, or after the light guide column 10 is shaped, a transparent pigment may be applied to the outer surface of the light guide column 10. 201213734 In use, for example, as shown in FIG. 4, the outer surface of the light guiding rod 10 is a rough surface, and the LED 26 is disposed below the incident surface 18 of the bowl-shaped curved surface, and the light enters the light guiding column 10 through the incident surface 18, and is incident on the light guiding cone. The column 14, the light-transmissive cylinder 12, and the light-emitting sphere 16 are scattered to emit light. , can be. Most of the light reaching the conical recess 20 is reflected and scattered by the conical recess 20, thereby eliminating the glare of the LED and improving the lateral illumination. In another embodiment, the tapered surface 24 of the light incident cone 14 is coated or plated with a highly reflective reflective material that is reflected by the reflective surface formed by the tapered surface 24 and thus directed to the light-transmissive cylinder 12. In another embodiment, as shown in FIG. 5, a highly reflective reflective material is coated or plated on the surface of the conical recessed hole 20, and the light that has passed through the light-transmitting cylinder 12 to reach the light-emitting sphere 16 is conically concave. The reflecting surface formed by the holes 20 is reflected, and thus all become lateral illumination. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a light guide column of the present invention; FIGS. 2 and 3 are perspective views of the light guide column of FIG. 1 at different viewing angles; FIG. 4 is a cross-sectional view of an LED lamp to which the light guide column of the present invention is applied; 5 is a cross-sectional view of an LED lamp to which another light guide of the present invention is applied. [Main component symbol description] 10 light guide column 201213734
12 透光圓柱 14 光入射圓錐柱 16 光出射球體 18 入射面 20 圓錐狀凹孔 22 定位部 24 光入射圓錐柱的錐面 26 LED12 Translucent cylinder 14 Light incident cone 16 Light exit sphere 18 Incidence surface 20 Conical recess 22 Positioning section 24 Cone surface of light incident cone 26 LED