JP4636678B2 - Traffic lights - Google Patents

Traffic lights Download PDF

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Publication number
JP4636678B2
JP4636678B2 JP2000381462A JP2000381462A JP4636678B2 JP 4636678 B2 JP4636678 B2 JP 4636678B2 JP 2000381462 A JP2000381462 A JP 2000381462A JP 2000381462 A JP2000381462 A JP 2000381462A JP 4636678 B2 JP4636678 B2 JP 4636678B2
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Japan
Prior art keywords
led element
light
lens
convex lens
signal lamp
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JP2000381462A
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Japanese (ja)
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JP2002183891A (en
Inventor
政広 興梠
剛 遠藤
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SHINGO DENZAI CO., LTD.
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SHINGO DENZAI CO., LTD.
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Priority to JP2000381462A priority Critical patent/JP4636678B2/en
Priority to TW090112158A priority patent/TW508543B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Description

【０００１】
【発明の属する技術分野】
本発明は発光ダイオード（以下「ＬＥＤ素子」と称する。）を光源に用いた信号灯に関し、更に詳しくは遠・近距離への配光を目的としたＬＥＤ信号灯に関するものである。
【０００２】
【従来の技術】
従来のＬＥＤ素子を光源に用いた信号灯は、プリント基板上にＬＥＤ素子を正立させその前方に無色透明または淡有色の透明性レンズカバーを設けた構造が殆どである。
【０００３】
しかし年々ＬＥＤ素子の発光出力が改善され、それに伴って信号灯１台に使用されるＬＥＤ素子数量は減ってきており、信号灯の必要光度値は確保できてもＬＥＤ素子使用個数の低下で一個一個のＬＥＤ素子発光が近距離より分かるようになり電球式のように面発光に見えなくなってきた。
又ＬＥＤ素子数量が減るにつれて、個々のＬＥＤ素子の発光を効率よく集光する必要が生じてきた。
【０００４】
そこで図１７に示すように、プリント基板ａに多数の同一特性のＬＥＤ素子ｂが並列配置され、各ＬＥＤ素子ｂによる光源前面に集光用凸レンズｃを配置した構成のものがある。
【０００５】
このＬＥＤ素子ｂから発光される光線ｄは、集光用凸レンズｃによって集光されて水平方向へ出力されることとなる。
【０００６】
従って信号灯より１００メートル離れた地点での視認における信号灯の必要光度値は充分に確保できることとなる。
【０００７】
【発明が解決しようとする課題】
しかしながら集光用凸レンズｃによる集光の場合には、光線ｄが直進方向へ配光されるために、信号灯から近距離の地点では光線ｄの配光から外れた状態となるために、信号灯の発光の視認が困難となる問題がある。
【０００８】
又朝日や西日による信号灯の擬似点灯防止として各ＬＥＤ素子間の基板上を黒色とするなどの防止策が採られているが、朝日や西日による外光が集光用凸レンズによって各ＬＥＤ素子に集光され、各ＬＥＤ素子が反射して擬似点灯を起こす問題が生じる。
【０００９】
そこで本発明では遠・近距離地点での信号灯の視認が行えると共に、各ＬＥＤ素子の反射による擬似点灯を防止する機構としたＬＥＤ信号灯を提供することを目的とする。
【００１０】
【課題を解決するための手段】
本発明は、請求項１は、その開口部にレンズカバーが装着される信号灯器本体内にプリント基板上に所要数のＬＥＤ素子を正立配置し、各ＬＥＤ素子の前方に集光用凸レンズを前傾させ、かつＬＥＤ素子の光源が集光用凸レンズの焦点位置より前の位置となるように配設したことを特徴とする。
【００１１】
請求項２は、請求項１の集光用凸レンズの表面若しくは裏面の少なくとも一方に微小なプリズムカット面を形成したことを特徴とする。
【００１２】
請求項３は、請求項１又は請求項２のレンズカバー裏面に適宜間隔ごとに光拡散用のプリズムを形成したことを特徴する。
【００１３】
請求項４は、その開口部にレンズカバーが装着される信号灯器本体内にプリント基板上に所要数のＬＥＤ素子を正立配置し、各ＬＥＤ素子の前方にフレネルレンズを前傾させ、かつＬＥＤ素子の光源がフレネルレンズの焦点位置より前の位置となるように配設したことを特徴とする。
【００１４】
請求項５は、請求項４のフレネルレンズの裏面に微小なプリズムカット面を形成したことを特徴とする。
【００１５】
請求項６は、請求項４又は請求項５のレンズカバー裏面に適宜間隔ごとに光拡散用のプリズムを形成したことを特徴する。
【００１６】
本発明ではＬＥＤ素子光軸上の集光用凸レンズ又はフレネルレンズを２０〜４０度までの範囲で前傾させ、かつＬＥＤ素子の光源が集光用凸レンズ又はフレネルレンズの焦点位置より前となるように配置することによって集光度合いが増すと共に、集光用凸レンズ又はフレネルレンズによって集光された出射光は水平方向から下方向へ配光され、遠・近距離からの視認が可能となる。
【００１７】
又西日などの外光は集光用凸レンズ又はフレネルレンズによって集光される場合には、ＬＥＤ素子の光源位置が上記集光用凸レンズ又はフレネルレンズの焦点位置と異なるために、ＬＥＤ素子が反射することによる擬似点灯を防止する効果を奏するものである。
【００１８】
更に集光用凸レンズ表面若しくは裏面に微小なプリズムカット面を形成する、あるいはフレネルレンズの裏面に微小なプリズムカット面を形成することによりＬＥＤ素子の光源からの出射光が分散されて信号灯の面発光による視認が可能となる。
【００１９】
なお信号灯器本体の開口部に装着されるレンズカバー裏面に適宜間隔ごとに光拡散用のプリズムを設けることによってより一層の下方向への出射光の配光および分散が行え近距離おいても確実なる面発光による視認が可能となる。
【００２０】
【発明の実施の形態】
以下本発明の実施の形態を、その実施例を示す図面を参酌しながら詳述する。
実施例１
図１および図２にそれぞれ示すように、前部が開口状とした信号灯器本体１内にプリント基板２が設けられ、このプリント基板２上に一定間隔ごとにＬＥＤ素子３、３、・・が並列配置される。
【００２１】
そして各ＬＥＤ素子３の光軸上前方に集光用凸レンズ４を前傾させた集光用凸レンズ集合体５を設け、更に信号灯器本体１の開口部に透明状のレンズカバー６を装着した構成とするものである。
【００２２】
そこで図３に示すように、各ＬＥＤ素子３の光軸上前方の集光用凸レンズ４を２０〜４０度までの範囲で前傾させ、かつＬＥＤ素子３が集光用凸レンズ４の焦点位置Ａより前に配置された構成とするものである。
【００２３】
次に図４に示すように、各ＬＥＤ素子３の光軸上前方の集光用凸レンズ４を２０〜４０度までの範囲で前傾させ、かつＬＥＤ素子３が集光用凸レンズ４の焦点位置より前に配置され、更に上記集光用凸レンズ４の裏面（ＬＥＤ素子側面）を微小なプリズムカット面７とした構成とするものである。
【００２４】
又図５に示すのは、実施例１における信号灯器本体１の開口部に装着されるレンズカバー６の裏面にプリズム８を設けた状態を示すものである。
【００２５】
実施例２
図６に示すように、プリント基板２上の各ＬＥＤ素子３の光軸上前方にフレネルレンズ９を２０〜４０度までの範囲で前傾させ、かつＬＥＤ素子３がフレネルレンズ９の焦点位置Ａより前に配置された構成とするものである。
【００２６】
次に図７に示すように、各ＬＥＤ素子３の光軸上前方のフレネルレンズ９を２０〜４０度までの範囲で前傾させ、かつＬＥＤ素子３がフレネルレンズ９の焦点位置より前に配置され、更に上記フレネルレンズ９の裏面（ＬＥＤ素子側面）を微小なプリズムカット面７とした構成とするものである。
【００２７】
又図８に示すのは、実施例２における信号灯器本体１の開口部に装着されるレンズカバー６の裏面にプリズム８を設けた状態を示すものである。
【００２８】
なお本発明ではプリント基板２上の各ＬＥＤ素子３間および一体成型される集光用凸レンズ集合体５およびフレネルレンズ集合体１０のつなぎ平面部１１面をつや消し状とすることによって西日などによって入射する光の反射を防ぐ構成とすることは勿論のことである。
【００２９】
又各集光用凸レンズ４および各フレネルレンズ９を一体成型により集光用凸レンズ集合体５およびフレネルレンズ集合体１０とする以外に、図９および図１０にそれぞれ示すように、各ＬＥＤ素子３に対してカップ状とした各集光用凸レンズ４および各フレネルレンズ９を被せた構成とすることも考えられる。
【００３０】
本発明の実施例１では図１１に示すように、各ＬＥＤ素子３から水平より上方へ出射される出射光Ｌａは、集光用凸レンズ４を通って水平方向正面に集光し、又各ＬＥＤ素子３から水平より下方へ出射される出射光Ｌａは集光用凸レンズ４を通って水平方向から下方向へ集光される。
更にレンズカバー６の裏面にプリズム８を通過する出射光Ｌａは下方向へ制御されることによって広範囲での下方向への配光が可能となる。
【００３１】
図１２に示すように、各ＬＥＤ素子３から水平より上方へ出射される出射光Ｌａは集光用凸レンズ４裏面の微小なプリズムカット面７によって細かく分散されて集光用凸レンズ４を通って水平方向正面に集光し、又各ＬＥＤ素子３から水平より下方へ出射される出射光Ｌａは集光用凸レンズ４裏面の微小なプリズムカット面７によって細かく分散されて集光用凸レンズ４を通って水平方向から下方向へ集光される。
【００３２】
更にレンズカバー６の裏面にプリズム８を通過する出射光Ｌａは下方向へ制御されることによって広範囲での下方向への配光が可能となる。
なお集光用凸レンズ４の表面に微小なプリズムカット面７を設けた場合又は表裏両面に微小なプリズムカット面７を設けた場合でも同様な作用効果を得ることができるものである。
【００３３】
又図１３に示すように、西日などによって信号灯器本体１内へ入射する外光Ｌｂで集光用凸レンズ４を通る外光Ｌｂは各ＬＥＤ素子３から外れた位置で集光されることでＬＥＤ素子への反射による擬似点灯が防止できる構成となる。
なお集光用凸レンズ４裏面の微小なプリズムカット面７を設けた場合においても図１３に示す効果を奏するものである。
【００３４】
本発明の実施例２では図１４に示すように、各ＬＥＤ素子３から水平より上方へ出射される出射光Ｌａはフレネルレンズ９を通って水平方向正面に集光し、又各ＬＥＤ素子３から水平より下方へ出射される出射光Ｌａはフレネルレンズ９を通って水平方向から下方向へ集光される。
更にレンズカバー６の裏面にプリズム８を通過する出射光Ｌａは下方向へ制御されることによって広範囲での下方向への配光が可能となる。
【００３５】
図１５に示すように、各ＬＥＤ素子３から水平より上方へ出射される出射光Ｌａはフレネルレンズ９裏面の微小なプリズムカット面７によって細かく分散されてフレネルレンズ９を通って水平方向正面に集光し、又各ＬＥＤ素子３から水平より下方へ出射される出射光Ｌａはフレネルレンズ９裏面の微小なプリズムカット面７によって細かく分散されてフレネルレンズ９を通って水平方向から下方向へ集光される。
更にレンズカバー６の裏面にプリズム８を通過する出射光Ｌａは下方向へ制御されることによって広範囲での下方向への配光が可能となる。
【００３６】
又図１６に示すように、西日などによって信号灯器本体１内へ入射する外光Ｌｂでフレネルレンズ９を通る外光Ｌｂは各ＬＥＤ素子３から外れた位置で集光されることでＬＥＤ素子への反射による擬似点灯が防止できる構成となる。
なおフレネルレンズ９裏面の微小なプリズムカット面７を設けた場合においても図１６に示す効果を奏するものである。
【００３７】
【発明の効果】
以上述べて来た如く本発明によれば、ＬＥＤ素子による光源を、集光用凸レンズおよびフレネルレンズの焦点距離より短い位置とすることにより、集光度合いが増すと共に集光用凸レンズおよびフレネルレンズを前傾させることで、遠・近距離への配光を可能とするものである。
【００３８】
又西日などによる外光による信号灯内への入射の場合には、ＬＥＤ素子位置と集光用凸レンズおよびフレネルレンズの焦点位置とが異なるために、ＬＥＤ素子に集光されることがなく、ＬＥＤ素子への反射による擬似点灯を防止することが可能となる。
【図面の簡単な説明】
【図１】本発明の信号灯の断面説明図である。
【図２】本発明の信号灯の正面説明図である。
【図３】本発明の実施例１における要部拡大説明図である。
【図４】本発明の実施例１における集光用凸レンズ裏面にプリズムを設けた状態の要部拡大説明図である。
【図５】本発明の実施例１におけるレンズカバー裏面にプリズムを設けた状態を示す説明図である。
【図６】本発明の実施例２における要部拡大説明図である。
【図７】本発明の実施例２におけるフレネルレンズ裏面にプリズムを設けた状態の要部拡大説明図である。
【図８】本発明の実施例２におけるレンズカバー裏面にプリズムを設けた状態を示す説明図である。
【図９】本発明の実施例１における集光用凸レンズの他の取り付け例を示す要部拡大説明図である。
【図１０】本発明の実施例２におけるフレネルレンズの他の取り付け例を示す要部拡大説明図である。
【図１１】本発明の実施例１における集光用凸レンズによる集光状態を示す説明図である。
【図１２】本発明の実施例１における集光用凸レンズ裏面にプリズムを設けた場合の集光状態を示す説明図である。
【図１３】本発明の実施例１における外光による集光状態を示す説明図である。
【図１４】本発明の実施例２におけるフレネルレンズによる集光状態を示す説明図である。
【図１５】本発明の実施例２におけるフレネルレンズ裏面にプリズムを設けた場合の集光状態を示す説明図である。
【図１６】本発明の実施例２における外光による集光状態を示す説明図である。
【図１７】従来のＬＥＤ素子による信号灯の一例を示す説明図である。
【符号の説明】
１ 信号灯器本体
２ プリント基板
３ ＬＥＤ素子
４ 集合用凸レンズ
６ レンズカバー
７ プリズムカット面
８ プリズム
９ フレネルレンズ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a signal lamp using a light-emitting diode (hereinafter referred to as “LED element”) as a light source, and more particularly to an LED signal lamp for the purpose of light distribution to a long distance.
[0002]
[Prior art]
Most signal lights using conventional LED elements as light sources have a structure in which an LED element is erected on a printed circuit board and a transparent lens cover of colorless or light color is provided in front of the LED element.
[0003]
However, the light emission output of LED elements has been improved year by year, and the number of LED elements used for one signal lamp has been reduced accordingly, and even if the required light intensity value of the signal lamp can be secured, the number of LED elements used decreases one by one. LED element light emission can be understood from a short distance, and surface light emission has become invisible like a light bulb type.
Further, as the number of LED elements decreases, it has become necessary to efficiently collect the light emitted from the individual LED elements.
[0004]
Therefore, as shown in FIG. 17, there is a configuration in which a large number of LED elements b having the same characteristics are arranged in parallel on a printed circuit board a, and a condensing convex lens c is arranged in front of the light source of each LED element b.
[0005]
The light beam d emitted from the LED element b is condensed by the condensing convex lens c and output in the horizontal direction.
[0006]
Therefore, the necessary light intensity value of the signal lamp for visual recognition at a point 100 meters away from the signal lamp can be sufficiently secured.
[0007]
[Problems to be solved by the invention]
However, in the case of condensing by the condensing convex lens c, the light beam d is distributed in the straight traveling direction, so that it is out of the light distribution of the light beam d at a short distance from the signal lamp. There is a problem that it is difficult to visually recognize emitted light.
[0008]
In addition, to prevent false lighting of signal lights due to the morning sun or the sun, prevention measures such as blackening the substrate between the LED elements are taken. There is a problem that each LED element is reflected to cause false lighting.
[0009]
Accordingly, an object of the present invention is to provide an LED signal lamp that can visually recognize a signal lamp at a far or short distance point and that has a mechanism for preventing false lighting due to reflection of each LED element.
[0010]
[Means for Solving the Problems]
According to the present invention, claim 1 arranges a required number of LED elements upright on a printed circuit board in a signal lamp body in which a lens cover is attached to an opening thereof, and a condensing convex lens is arranged in front of each LED element. It is characterized in that it is tilted forward and the light source of the LED element is disposed at a position before the focal position of the condensing convex lens.
[0011]
According to a second aspect of the present invention, a minute prism cut surface is formed on at least one of the front surface and the rear surface of the condensing convex lens of the first aspect.
[0012]
According to a third aspect of the present invention, prisms for light diffusion are formed on the rear surface of the lens cover according to the first or second aspect at appropriate intervals.
[0013]
According to a fourth aspect of the present invention, a required number of LED elements are arranged upright on a printed circuit board in a signal lamp body in which a lens cover is attached to the opening, a Fresnel lens is tilted forward in front of each LED element, and the LED The light source of the element is disposed so as to be in a position before the focal position of the Fresnel lens.
[0014]
A fifth aspect is characterized in that a minute prism cut surface is formed on the back surface of the Fresnel lens according to the fourth aspect.
[0015]
A sixth aspect is characterized in that light diffusion prisms are formed at appropriate intervals on the rear surface of the lens cover according to the fourth or fifth aspect.
[0016]
In the present invention, the convex lens or Fresnel lens for condensing on the optical axis of the LED element is tilted forward in the range of 20 to 40 degrees, and the light source of the LED element is in front of the focal position of the convex lens or Fresnel lens for condensing. In addition to increasing the degree of condensing, the emitted light collected by the condensing convex lens or Fresnel lens is distributed downward from the horizontal direction, and can be viewed from a long distance.
[0017]
In addition, when outside light such as a western sun is condensed by a condensing convex lens or Fresnel lens, the light source position of the LED element is different from the focal position of the condensing convex lens or Fresnel lens. This has the effect of preventing pseudo lighting caused by the operation.
[0018]
Furthermore, by forming a minute prism cut surface on the front or back surface of the convex lens for condensing, or by forming a minute prism cut surface on the back surface of the Fresnel lens, the emitted light from the light source of the LED element is dispersed, and the signal lamp surface emission Can be visually recognized.
[0019]
In addition, by providing light diffusion prisms at appropriate intervals on the back of the lens cover that is attached to the opening of the signal lamp body, light distribution and dispersion of the emitted light can be further reduced, even at short distances. Visual recognition by surface emission becomes possible.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings illustrating the embodiments.
Example 1
As shown in FIGS. 1 and 2, a printed circuit board 2 is provided in a signal lamp body 1 having an opening at the front, and LED elements 3, 3,. Arranged in parallel.
[0021]
A condensing convex lens assembly 5 in which the condensing convex lens 4 is tilted forward is provided in front of the optical axis of each LED element 3, and a transparent lens cover 6 is attached to the opening of the signal lamp body 1. It is what.
[0022]
Therefore, as shown in FIG. 3, the condensing convex lens 4 on the front of the optical axis of each LED element 3 is tilted forward in the range of 20 to 40 degrees, and the LED element 3 is in the focal position A of the converging convex lens 4. It is set as the structure arrange | positioned before.
[0023]
Next, as shown in FIG. 4, the condensing convex lens 4 on the front of the optical axis of each LED element 3 is tilted forward in the range of 20 to 40 degrees, and the LED element 3 is in the focal position of the converging convex lens 4. Further, the arrangement is such that the back surface (side surface of the LED element) of the condensing convex lens 4 is a minute prism cut surface 7.
[0024]
FIG. 5 shows a state in which the prism 8 is provided on the back surface of the lens cover 6 attached to the opening of the signal lamp body 1 in the first embodiment.
[0025]
Example 2
As shown in FIG. 6, the Fresnel lens 9 is tilted forward in the range of 20 to 40 degrees on the optical axis of each LED element 3 on the printed circuit board 2, and the LED element 3 has a focal position A of the Fresnel lens 9. It is set as the structure arrange | positioned before.
[0026]
Next, as shown in FIG. 7, the front Fresnel lens 9 on the optical axis of each LED element 3 is tilted forward in the range of 20 to 40 degrees, and the LED element 3 is disposed before the focal position of the Fresnel lens 9. In addition, the back surface (LED element side surface) of the Fresnel lens 9 is formed as a minute prism cut surface 7.
[0027]
FIG. 8 shows a state in which the prism 8 is provided on the back surface of the lens cover 6 attached to the opening of the signal lamp body 1 in the second embodiment.
[0028]
In the present invention, the incident light is incident between the LED elements 3 on the printed circuit board 2 and the surface 11 of the converging convex lens assembly 5 and the Fresnel lens assembly 10 which are integrally molded by matting. Of course, it is configured to prevent reflection of light.
[0029]
In addition to forming the condensing convex lens assembly 5 and the Fresnel lens assembly 10 by integrally molding each condensing convex lens 4 and each Fresnel lens 9, as shown in FIG. 9 and FIG. On the other hand, it is also conceivable to cover each condensing convex lens 4 and Fresnel lens 9 in a cup shape.
[0030]
In Embodiment 1 of the present invention, as shown in FIG. 11, the emitted light La emitted upward from the horizontal from each LED element 3 is condensed in front of the horizontal direction through the condensing convex lens 4, and each LED The outgoing light La emitted from the element 3 downward from the horizontal passes through the condensing convex lens 4 and is condensed from the horizontal direction to the downward direction.
Furthermore, the outgoing light La that passes through the prism 8 on the back surface of the lens cover 6 is controlled downward, so that light can be distributed downward in a wide range.
[0031]
As shown in FIG. 12, the outgoing light La emitted upward from the horizontal from each LED element 3 is finely dispersed by the minute prism cut surface 7 on the back surface of the condensing convex lens 4 and passes through the condensing convex lens 4 to be horizontal. The outgoing light La that is condensed in front of the direction and emitted downward from the horizontal from each LED element 3 is finely dispersed by the minute prism cut surface 7 on the back surface of the condensing convex lens 4 and passes through the condensing convex lens 4. It is condensed from the horizontal direction to the downward direction.
[0032]
Furthermore, the outgoing light La that passes through the prism 8 on the back surface of the lens cover 6 is controlled downward, so that light can be distributed downward in a wide range.
The same effect can be obtained even when a minute prism cut surface 7 is provided on the surface of the condensing convex lens 4 or when a minute prism cut surface 7 is provided on both the front and back surfaces.
[0033]
Further, as shown in FIG. 13, the external light Lb that enters the signal lamp main body 1 due to the sun or the like and passes through the convex lens 4 for condensing is condensed at a position deviated from each LED element 3. It becomes the structure which can prevent the pseudo lighting by reflection to an LED element.
Even when the minute prism cut surface 7 on the back surface of the condensing convex lens 4 is provided, the effect shown in FIG. 13 is obtained.
[0034]
In Example 2 of the present invention, as shown in FIG. 14, the emitted light La emitted upward from the horizontal from each LED element 3 is condensed in front of the horizontal direction through the Fresnel lens 9, and from each LED element 3. The outgoing light La emitted downward from the horizontal passes through the Fresnel lens 9 and is condensed from the horizontal direction to the downward direction.
Furthermore, the outgoing light La that passes through the prism 8 on the back surface of the lens cover 6 is controlled downward, so that light can be distributed downward in a wide range.
[0035]
As shown in FIG. 15, the outgoing light La emitted upward from the horizontal from each LED element 3 is finely dispersed by the minute prism cut surface 7 on the back surface of the Fresnel lens 9 and passes through the Fresnel lens 9 and gathers in the front in the horizontal direction. The emitted light La emitted from each LED element 3 downward from the horizontal is finely dispersed by the minute prism cut surface 7 on the back surface of the Fresnel lens 9 and condensed through the Fresnel lens 9 from the horizontal direction to the downward direction. Is done.
Furthermore, the outgoing light La that passes through the prism 8 on the back surface of the lens cover 6 is controlled downward, so that light can be distributed downward in a wide range.
[0036]
In addition, as shown in FIG. 16, the external light Lb that passes through the Fresnel lens 9 by the external light Lb incident into the signal lamp main body 1 due to the sun or the like is condensed at a position off the LED elements 3, thereby the LED elements. It becomes the structure which can prevent the pseudo lighting by reflection in the.
Even when the minute prism cut surface 7 on the back surface of the Fresnel lens 9 is provided, the effect shown in FIG. 16 is achieved.
[0037]
【The invention's effect】
As described above, according to the present invention, by setting the light source by the LED element to a position shorter than the focal length of the condensing convex lens and the Fresnel lens, the degree of condensing increases and the condensing convex lens and the Fresnel lens are provided. By tilting forward, light distribution over long and short distances is possible.
[0038]
In addition, in the case of incident light into the signal lamp due to external light such as the West, the LED element position is different from the focal position of the condensing convex lens and the Fresnel lens, so that the LED element is not condensed and the LED element is not condensed. It is possible to prevent pseudo lighting due to reflection on the element.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view of a signal lamp of the present invention.
FIG. 2 is an explanatory front view of the signal lamp of the present invention.
FIG. 3 is an enlarged explanatory view of a main part in Embodiment 1 of the present invention.
FIG. 4 is an enlarged explanatory view of a main part in a state in which a prism is provided on the back surface of the condensing convex lens in Example 1 of the present invention.
FIG. 5 is an explanatory diagram illustrating a state in which a prism is provided on the back surface of the lens cover according to the first exemplary embodiment of the present invention.
FIG. 6 is an enlarged explanatory view of a main part in Embodiment 2 of the present invention.
FIG. 7 is an enlarged explanatory view of a main part in a state in which a prism is provided on the back surface of the Fresnel lens in Embodiment 2 of the present invention.
FIG. 8 is an explanatory view showing a state in which a prism is provided on the rear surface of the lens cover in Embodiment 2 of the present invention.
FIG. 9 is a main part enlarged explanatory view showing another example of attaching a condensing convex lens in Example 1 of the present invention.
FIG. 10 is an enlarged explanatory view of a main part showing another example of attaching a Fresnel lens in Example 2 of the present invention.
FIG. 11 is an explanatory diagram showing a condensing state by a condensing convex lens in Example 1 of the present invention.
FIG. 12 is an explanatory diagram showing a condensing state when a prism is provided on the back surface of the condensing convex lens in Example 1 of the present invention.
FIG. 13 is an explanatory diagram showing a light collection state by external light according to the first embodiment of the present invention.
FIG. 14 is an explanatory diagram showing a condensing state by a Fresnel lens in Embodiment 2 of the present invention.
FIG. 15 is an explanatory diagram showing a light collection state when a prism is provided on the back surface of the Fresnel lens in Embodiment 2 of the present invention.
FIG. 16 is an explanatory diagram showing a light collection state by external light according to the second embodiment of the present invention.
FIG. 17 is an explanatory diagram showing an example of a signal lamp using a conventional LED element.
[Explanation of symbols]
1 Signal Lamp Body 2 Printed Circuit Board 3 LED Element 4 Convex Convex Lens 6 Lens Cover 7 Prism Cut Surface 8 Prism 9 Fresnel Lens

Claims (3)

その開口部にレンズカバーが装着される信号灯器本体と、
該信号灯器本体内のプリント基板上に正立配置された所要数のＬＥＤ素子と、
該ＬＥＤ素子と１：１に対応して同ＬＥＤ素子の光軸上前方に配置されると共に、前記ＬＥＤ素子の光軸となす角度が２０度超〜４０度未満の範囲内であり、更に、その焦点位置が対応する前記ＬＥＤ素子の光源よりも光軸上後方である集光用凸レンズと、
該集光用凸レンズ間に形成されたつや消し状のつなぎ平面部とを備える
交通信号灯。 A signal lamp body with a lens cover attached to the opening,
A required number of LED elements arranged upright on a printed circuit board in the signal lamp body; and
The LED element is arranged in front of the LED element in a 1: 1 ratio, and the angle formed with the optical axis of the LED element is in the range of more than 20 degrees to less than 40 degrees, A condensing convex lens whose focal position is behind the light source of the corresponding LED element on the optical axis;
A mat-shaped connecting flat surface portion formed between the converging convex lenses.
Traffic light . 上記集光用凸レンズの表面若しくは裏面の少なくとも一方に微小なプリズムカット面を形成した
請求項１記載の交通信号灯。A minute prism cut surface was formed on at least one of the front surface or the back surface of the converging convex lens.
The traffic light according to claim 1 . 上記レンズカバー裏面に適宜間隔ごとに光拡散用のプリズムを形成した
請求項１又は請求項２記載の交通信号灯。Light diffusion prisms were formed at appropriate intervals on the back surface of the lens cover.
The traffic signal lamp according to claim 1 or 2 .
JP2000381462A 2000-12-15 2000-12-15 Traffic lights Expired - Fee Related JP4636678B2 (en)

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