【発明の名称】ＬＥＤ灯具[Title of the Invention] LED lighting
【０００１】
【発明の属する技術分野】
本発明は、特に、テールランプ、ストップランプ、ターンシグナルランプなど主として信号用に使用される灯具に関するものであり、詳細には、光源としてＬＥＤランプを採用する灯具の構成に係るものである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lamp mainly used for a signal, such as a tail lamp, a stop lamp, and a turn signal lamp, and more particularly to a configuration of a lamp employing an LED lamp as a light source.
【０００８】
【課題を解決するための手段】
本発明は上記した従来の課題を解決するための具体的手段として、灯具の中心軸から略等距離の円周上とし且つ前記中心軸と光軸とは適宜距離の一点で交差するように複数のＬＥＤランプを配置すると共に、それぞれのＬＥＤランプに対し前記中心軸側の略半部に前記光軸に略平行な半円筒状反射面を設け残りの略半部にこのＬＥＤランプからの光の進行方向に向い開くコニカルホーン状反射面を設け前記一点の近傍でこれらの半円筒状反射面とコニカルホーン状反射面とを一体化させて１つの開口部を有し前記一点の近傍を疑似焦点とする光源ユニットを形成し、且つ、前記中心軸上には前記疑似焦点を第一焦点とする双曲線の第二焦点とこの第二焦点を焦点とする回転双曲面反射面を設けると共に前記第一焦点側には前記第二焦点を焦点とする回転放物面系反射面を設けたことを特徴とするＬＥＤ灯具を提供することで、点灯時の見え方を白熱電球を光源とする灯具に近づけることを可能として課題を解決するものである。[0008]
[Means for Solving the Problems]
As a specific means for solving the above-mentioned conventional problems, the present invention is directed to a method in which the center axis and the optical axis are arranged on a circumference substantially equidistant from the center axis of the lamp so that the center axis and the optical axis intersect at one point at an appropriate distance. And a semi-cylindrical reflecting surface substantially parallel to the optical axis is provided in a substantially half portion on the central axis side for each LED lamp, and light from the LED lamp is provided in the remaining substantially half portion. A conical horn-shaped reflecting surface that opens in the traveling direction is provided, and the semi-cylindrical reflecting surface and the conical horn-shaped reflecting surface are integrated near the one point to have one opening, and a pseudo focus near the one point is provided. And a second hyperbolic focal point having the pseudo focal point as a first focal point and a rotating hyperboloid reflecting surface having the second focal point as a focal point are provided on the central axis. Focus the second focus on the focal side The object of the present invention is to solve the problem by providing an LED lamp characterized by providing a rotating parabolic reflective surface, which makes it possible to make the appearance at the time of lighting closer to a lamp using an incandescent bulb as a light source. .
【００３４】
【発明の効果】
以上に説明したように本発明により、灯具の中心軸から略等距離の円周上とし且つ前記中心軸と光軸とは適宜距離の一点で交差するように複数のＬＥＤランプを配置すると共に、それぞれのＬＥＤランプに対し前記中心軸側の略半部に前記光軸に略平行な半円筒状反射面を設け残りの略半部にこのＬＥＤランプからの光の進行方向に向い開くコニカルホーン状反射面を設け前記一点の近傍でこれらの半円筒状反射面とコニカルホーン状反射面とを一体化させて１つの開口部を有し前記一点の近傍を疑似焦点とする光源ユニットを形成し、且つ、前記中心軸上には前記疑似焦点を第一焦点とする双曲線の第二焦点とこの第二焦点を焦点とする回転双曲面反射面を設けると共に前記第一焦点側には前記第二焦点を焦点とする回転放物面系反射面を設けたＬＥＤ灯具としたことで、光源ユニットにより複数のＬＥＤランプからの光を疑似焦点に収束し、回転双曲面反射面で照射角を拡げて回転放物面系反射面に入射させるものとなり、あたかも白熱電球を光源として採用した灯具のような点灯フィーリングを得られるものとする。よって、従来のＬＥＤランプを光源とする灯具のように光ムラも生ぜず観視者に違和感を生じさせないものとなり、この種のＬＥＤ灯具の美観の向上に極めて優れた効果を奏するものである。また、同じ発光面積であればＬＥＤランプの必要数は大幅に低減されるものとなり、この種のＬＥＤ灯具のコストダウンにも極めて優れた効果を奏するものとなる。[0034]
【The invention's effect】
As described above, according to the present invention, a plurality of LED lamps are arranged on a circumference substantially equidistant from the central axis of the lamp, and the central axis and the optical axis intersect at one point at an appropriate distance. A semi-cylindrical reflecting surface substantially parallel to the optical axis is provided in a substantially half portion of the center axis side for each LED lamp, and a conical horn shape is provided in the remaining substantially half portion in a direction in which light from the LED lamp travels. A light source unit having a reflective surface and integrating the semi-cylindrical reflective surface and the conical horn-shaped reflective surface in the vicinity of the one point to form a light source unit having one opening and having the vicinity of the one point as a pseudo focus is formed. A second focal point of a hyperbola having the pseudo focal point as a first focal point and a rotating hyperboloid reflecting surface having a focal point of the second focal point are provided on the central axis, and the second focal point is provided on the first focal point side. Parabolic reflective surface With the LED light fixture, the light source unit converges the light from the plurality of LED lamps to the pseudo-focus, expands the irradiation angle on the rotating hyperboloid reflecting surface, and makes it incident on the rotating parabolic reflecting surface. A lighting feeling like a lamp using an incandescent light bulb as a light source can be obtained. Therefore, unlike a lamp using a conventional LED lamp as a light source, light unevenness does not occur and a viewer does not feel uncomfortable, and this type of LED lamp has an extremely excellent effect on improving the aesthetic appearance. In addition, if the light emitting area is the same, the required number of LED lamps is greatly reduced, and this type of LED lamp has an extremely excellent effect on cost reduction.