JP2006059541A - Light guide and led light source unit equipped with it - Google Patents

Light guide and led light source unit equipped with it Download PDF

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JP2006059541A
JP2006059541A JP2004237059A JP2004237059A JP2006059541A JP 2006059541 A JP2006059541 A JP 2006059541A JP 2004237059 A JP2004237059 A JP 2004237059A JP 2004237059 A JP2004237059 A JP 2004237059A JP 2006059541 A JP2006059541 A JP 2006059541A
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light guide
optical axis
led
lens
light
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Kiyohiro Akiyama
精宏 秋山
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Ichikoh Ind Ltd
市光工業株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a light guide and an LED light source unit using the light guide capable of irradiating out an illumination light in the optical axis direction by using a flat plate shaped LED substrate for a lens which is installed at a vehicle inclined against the optical axis of the illumination light irradiated outside the vehicle. <P>SOLUTION: The light guide 5 is installed between a lens 2 to be installed at the vehicle in a state of being inclined by an angle θ in the perpendicular direction to the optical axis of the illumination light irradiated out of the vehicle and an LED plane substrate 3 in which a plurality of LEDs 4 are installed and which is installed nearly in parallel with the lens 2. The light guide 5 has a first light guide part 7 to guide the illumination light emitted from the LEDs 4 in the perpendicular direction (α direction) to the LED plane substrate 3, a reflecting face 8 to reflect the illumination light guided by the first light guide part 7 in the optical axis direction (β direction) of the optical axis, and a second light guide part 9 to guide the illumination light reflected by the reflecting face 8 in the optical axis direction (β direction). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、レンズと、該レンズにほぼ平行に設置されるLED平面基板との間に設けられる導光体及びそれを備えたLED光源ユニットに関するものである。   The present invention relates to a light guide provided between a lens and an LED flat substrate installed substantially parallel to the lens, and an LED light source unit including the same.
従来より、消費電力の低減、光源ユニットの小型化・薄型化等を図るために、車両用灯具の光源としてLEDを用いたものが数多く知られている(例えば、特許文献1参照)。
特開2002−245813号公報(第2図、第3図、第4図)
2. Description of the Related Art Conventionally, many devices using LEDs as a light source of a vehicular lamp are known in order to reduce power consumption and reduce the size and thickness of a light source unit (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 2002-245813 (FIGS. 2, 3, and 4)
ところで、近時の車両デザインの傾向から、レンズが車外に照出される照明光の光軸に対して傾斜して設けられることが多くなっている。一方で、照明光源であるLEDは、LED光源の光軸が前述した光軸と同方向を臨むようにして灯具に設置する必要がある。   By the way, from the recent trend of vehicle design, the lens is often provided inclined with respect to the optical axis of the illumination light projected outside the vehicle. On the other hand, the LED that is the illumination light source needs to be installed in the lamp such that the optical axis of the LED light source faces the same direction as the optical axis described above.
そのため、車外に照出される照明光の光軸に対して傾斜させて車両に設置されるレンズに対して、LED平面基板を前述の光軸方向を臨むようにして設置する方法が用いられているが、この方法ではレンズとLED平面基板との間に通常より広めの空間が必要とされるので、灯具自体が大きくなってしまうという問題があった。   Therefore, a method is used in which the LED flat substrate is installed so as to face the optical axis direction described above, with respect to the lens installed in the vehicle inclined with respect to the optical axis of the illumination light emitted outside the vehicle. In this method, since a space larger than usual is required between the lens and the LED flat substrate, there is a problem that the lamp itself becomes large.
また、LEDをレンズ面の傾斜に合わせて階段状に設置する方法(特許文献1参照)も考えられているが、この方法ではLED基板を階段状に製造する必要が生じ、平面基板が使えないためコストの上昇を招くという問題があった。   Moreover, although the method (refer patent document 1) which installs LED stepwise according to the inclination of a lens surface is also considered, in this method, it will be necessary to manufacture an LED board in step shape, and a plane board cannot be used. Therefore, there was a problem that the cost increased.
本発明は上記の問題に鑑みてなされたものであり、車外に照出される照明光の光軸に対して傾斜させて車両に設置されたレンズに平板状のLED基板を用いて、照明光を前記光軸方向へ照出させることが可能な導光体及びその導光体を用いたLED光源ユニットを提供することを課題とする。   The present invention has been made in view of the above-described problem, and a flat LED substrate is used for a lens installed in a vehicle so as to be inclined with respect to the optical axis of the illumination light projected outside the vehicle. It is an object of the present invention to provide a light guide capable of projecting in the optical axis direction and an LED light source unit using the light guide.
上記課題を解決するために、本発明に係る導光体は、車外に照出される照明光の光軸に対して傾斜させて車両に設置されるレンズと、複数のLEDが設けられて前記レンズにほぼ平行に設置されるLED平面基板との間に設けられ、前記LEDより発せられた照明光を前記LED平面基板に垂直な方向へ導光する第1導光部と、該第1導光部により導光された照明光を前記光軸の光軸方向に反射する反射面と、該反射面で反射された照明光を前記光軸方向へ導光する第2導光部とを有することを特徴とする。   In order to solve the above-described problems, a light guide according to the present invention includes a lens installed on a vehicle that is inclined with respect to an optical axis of illumination light projected outside the vehicle, and a plurality of LEDs. And a first light guide part that guides illumination light emitted from the LED in a direction perpendicular to the LED flat substrate, and the first light guide. A reflective surface that reflects the illumination light guided by the optical unit in the optical axis direction of the optical axis, and a second light guide unit that guides the illumination light reflected by the reflective surface in the optical axis direction. It is characterized by.
とくに、前記レンズは前記光軸に垂直な方向に対してθだけ傾斜して設置され、前記反射面は、前記光軸に対してθ/2だけ傾斜して形成されることが好ましい。   In particular, it is preferable that the lens is installed with an inclination of θ with respect to a direction perpendicular to the optical axis, and the reflection surface is formed with an inclination of θ / 2 with respect to the optical axis.
また、本発明に係るLED光源ユニットは、車外に照出される照明光の光軸に対して傾斜させて車両に設置されるレンズと、複数のLEDが設けられて前記レンズにほぼ平行に設置されるLED平面基板と、前記LEDより発せられる照明光を前記光軸の光軸方向へ導く導光体とを有し、該導光体が、前記LEDより発せられた照明光を前記LED平面基板に垂直な方向へ導光する第1導光部と、該第1導光部により導光された照明光を前記光軸方向に反射する反射面と、該反射面で反射された照明光を前記光軸方向へ導光する第2導光部とを有することを特徴とする。   In addition, the LED light source unit according to the present invention includes a lens installed in the vehicle inclined with respect to the optical axis of the illumination light emitted outside the vehicle, and a plurality of LEDs provided and installed substantially parallel to the lens. And an LED light guide that guides illumination light emitted from the LED in the optical axis direction of the optical axis, and the light guide emits illumination light emitted from the LED. A first light guide section that guides light in a direction perpendicular to the first light guide section, a reflective surface that reflects illumination light guided by the first light guide section in the optical axis direction, and illumination light reflected by the reflective surface. And a second light guide part for guiding light in the optical axis direction.
本発明に係る導光体及びLED光源ユニットを用いることによって、レンズが車外に照出される照明光の光軸に対して傾斜した状態で車両に設置された場合であっても、平板状のLED基板(LED平面基板)を用いて照明光を前記光軸方向に照出させることが可能となる。   By using the light guide and the LED light source unit according to the present invention, even when the lens is installed in the vehicle in a state inclined with respect to the optical axis of the illumination light projected outside the vehicle, the flat LED Illumination light can be emitted in the optical axis direction using a substrate (LED flat substrate).
また、LED平面基板をレンズとほぼ平行にして取り付けることができるので、レンズとLED平面基板との間隔を最小限にすることができ、灯具の小型化を図ることが容易となる。さらに、LED基板を階段状に形成する必要が無いので、コストの低減を図ることが容易となる。   Further, since the LED flat substrate can be mounted substantially parallel to the lens, the distance between the lens and the LED flat substrate can be minimized, and the lamp can be easily downsized. Furthermore, since it is not necessary to form the LED substrate in a step shape, it becomes easy to reduce the cost.
以下、本発明に係るLED光源ユニットを、テールランプとして用いる場合を例示し、図面を用いて説明する。   Hereinafter, a case where the LED light source unit according to the present invention is used as a tail lamp will be described with reference to the drawings.
図1に示すように、LED光源ユニットであるテールランプ1は、レンズ2と、LED平面基板3と、LED平面基板3上に等間隔に配設された複数のLED4と、導光体5とを有している。   As shown in FIG. 1, a tail lamp 1 that is an LED light source unit includes a lens 2, an LED flat substrate 3, a plurality of LEDs 4 arranged at equal intervals on the LED flat substrate 3, and a light guide 5. Have.
レンズ2は、車外に照出される照明光の光軸に垂直な方向、例えば車幅方向に対して、θだけ傾斜させた状態で車両本体に設けられている。LED平板基板3は、レンズ2とほぼ平行に車両本体に取り付けられている。このため、LED平板基板3は、車幅方向(光軸に垂直な方向)に対してθだけ傾斜された状態となる。   The lens 2 is provided in the vehicle body in a state where the lens 2 is inclined by θ with respect to a direction perpendicular to the optical axis of the illumination light emitted outside the vehicle, for example, the vehicle width direction. The LED flat substrate 3 is attached to the vehicle body substantially parallel to the lens 2. For this reason, the LED flat substrate 3 is inclined by θ with respect to the vehicle width direction (direction perpendicular to the optical axis).
LED4は、LED4の光軸がLED平面基板3に垂直な方向に向かうようにして、LED平面基板3上に等間隔に複数設置されている。導光体5は、レンズ2とLED平面基板3との間に設けられている。なお、以下、説明の便宜上、LED平面基板に垂直な方向をα方向とし、車外に照出される照明光の光軸方向、本実施例においては車両後方をβ方向とする。   A plurality of LEDs 4 are installed at equal intervals on the LED flat substrate 3 such that the optical axis of the LED 4 is directed in a direction perpendicular to the LED flat substrate 3. The light guide 5 is provided between the lens 2 and the LED flat substrate 3. Hereinafter, for convenience of explanation, the direction perpendicular to the LED plane substrate is defined as α direction, the optical axis direction of the illumination light emitted outside the vehicle, and in this embodiment, the vehicle rear direction is defined as β direction.
図2は、導光体5を示した拡大平面図であり、図3は導光体5を示した斜視図である。導光体5は透光性の高い材料、例えば、ポリカーボネート等の合成樹脂によって形成されている。導光体5は、LED4より発せられた照明光をLED平面基板3に垂直な方向(α方向)へ導光する第1導光部7と、第1導光部7により導光された照明光を車両後方(光軸方向:β方向)に反射する反射面8と、反射面8で反射された照明光を車両後方(光軸方向:β方向)へ導光する第2導光部9とを有している。   FIG. 2 is an enlarged plan view showing the light guide 5, and FIG. 3 is a perspective view showing the light guide 5. The light guide 5 is made of a highly translucent material, for example, a synthetic resin such as polycarbonate. The light guide 5 includes a first light guide 7 that guides illumination light emitted from the LEDs 4 in a direction (α direction) perpendicular to the LED flat substrate 3, and illumination guided by the first light guide 7. A reflective surface 8 that reflects light rearward of the vehicle (optical axis direction: β direction) and a second light guide unit 9 that guides illumination light reflected by the reflective surface 8 rearward of the vehicle (optical axis direction: β direction). And have.
第1導光部7は、LED平面基板3に垂直な方向(α方向)に延びる導光帯により形成されている。導光体5は、LED4が第1導光部7のLED平面基板3側端部に形成された略半球状の凹所10を臨むようにして設置される。LED4より照射された照明光は、LED平面基板3側に形成される曲部11の曲面と湾曲状凸部12の内面とで屈折又は反射されて、LED平面基板3に対して垂直な方向(α方向)に照射される。α方向に照射方向が整えられた照明光は、第1導光部7によって反射面8へと導光される。   The first light guide 7 is formed by a light guide band extending in a direction (α direction) perpendicular to the LED flat substrate 3. The light guide 5 is installed so that the LED 4 faces a substantially hemispherical recess 10 formed at the end of the first light guide 7 on the LED flat substrate 3 side. The illumination light emitted from the LED 4 is refracted or reflected by the curved surface of the curved portion 11 formed on the LED flat substrate 3 side and the inner surface of the curved convex portion 12, and is perpendicular to the LED flat substrate 3 ( Irradiated in the α direction). The illumination light whose irradiation direction is adjusted in the α direction is guided to the reflection surface 8 by the first light guide unit 7.
第2導光部9は、車両後方(光軸方向:β方向)に延設された導光帯によって構成されており、第2導光部9内を通る照射光は、車両後方(光軸方向:β方向)に平行に導光される。第2導光部9のレンズ2側端部には拡散プリズム面13が階段状に形成されている。   The second light guide unit 9 is configured by a light guide band extending rearward of the vehicle (optical axis direction: β direction). Irradiation light passing through the second light guide unit 9 is rearward of the vehicle (optical axis). Direction: β direction). A diffusion prism surface 13 is formed in a stepped shape at the end of the second light guide 9 on the lens 2 side.
反射面8は、車両前方(光軸の反光軸方向:−β方向)に対してθ/2だけ傾斜して形成されている。反射面8のLED平面基板3側の端点Bは、第1導光部7の湾曲状凸部12の一端点Aからα方向へ延びる延長線と、第2導光部9の一端点Fから−β方向へと延びる延長線(図2に示す二点鎖線)との交点に位置し、反射面8のレンズ2側の端点Dは、第1導光部7の湾曲状凸部12の他端点Gからα方向へ延びる延長線(図2に示す二点鎖線)と、第2導光部の他端点Eから−β方向へと延びる延長線との交点に位置する。また、図2に示す交点Cは、他端点Gのα方向に延びる延長線と端点Bからβ方向に延びる延長線(図2に示す二点鎖線)との交点である。   The reflecting surface 8 is formed to be inclined by θ / 2 with respect to the front of the vehicle (the direction opposite to the optical axis of the optical axis: -β direction). The end point B of the reflecting surface 8 on the LED flat substrate 3 side is from an extension line extending in the α direction from one end point A of the curved convex portion 12 of the first light guide portion 7 and one end point F of the second light guide portion 9. The end point D on the lens 2 side of the reflecting surface 8 is located at the intersection with the extension line (two-dot chain line shown in FIG. 2) extending in the −β direction. It is located at the intersection of an extension line (two-dot chain line shown in FIG. 2) extending from the end point G in the α direction and an extension line extending from the other end point E of the second light guide portion in the −β direction. 2 is an intersection of an extension line extending from the other end point G in the α direction and an extension line extending from the end point B in the β direction (two-dot chain line shown in FIG. 2).
つまり、図2に示すように、端点Bは一端点Aからα方向であって所定距離だけ離れた位置にあり、交点Cは、他端点Gからα線方向ありかつ端点Bのβ方向に位置し、一端点Fは交点Cのβ方向に位置し、端点Dは端点Bからβ方向に対してθ/2の角度で、かつ、交点Cのα方向の位置にあり、他端点Eは端点Dからβ方向の所定距離にある。なお、端点Bと一端点Aとの所定距離及び端点Dと他端点Eとの所定距離は、レンズ2とLED平面基板3との位置関係により決定され、レンズ2とLED平面基板3との間隔に応じて延短される。   That is, as shown in FIG. 2, the end point B is in the α direction from the one end point A at a predetermined distance, and the intersection C is in the α line direction from the other end point G and in the β direction of the end point B. One end point F is located in the β direction of the intersection point C, the end point D is at an angle θ / 2 with respect to the β direction from the end point B, and is located in the α direction of the intersection point C, and the other end point E is the end point It is a predetermined distance in the β direction from D. The predetermined distance between the end point B and the one end point A and the predetermined distance between the end point D and the other end point E are determined by the positional relationship between the lens 2 and the LED flat substrate 3, and the distance between the lens 2 and the LED flat substrate 3. It is shortened according to.
導光体5は、図1及び図3に示すように、第1導光部7と第2導光部9と反射面8とが複数連結して構成される棒状態(導光棒)でレンズ2とLED平面基板3との間に設置される。導光体5は、レンズ2の面積の大きさに応じて複数用いられる。   As shown in FIGS. 1 and 3, the light guide 5 is in a bar state (light guide bar) configured by connecting a plurality of first light guide parts 7, second light guide parts 9, and reflecting surfaces 8. It is installed between the lens 2 and the LED flat substrate 3. A plurality of light guides 5 are used according to the size of the area of the lens 2.
上述した導光体5が設けられたテールランプ(LED光源ユニット)1において、LED4が点灯すると、LED4の照明光が導光体5の曲部11の曲面及び湾曲状凸部12の内面で反射・屈折されてα方向に平行な平行線として第1導光部7内を進む。第1導光部7に導光された照明光は反射面8で内反射されてβ方向に進行方向を変更して第2導光部9内を進む。第2導光部9に導光された照明光は、第2導光部9のレンズ側端部に形成された階段状の拡散プリズム面13により拡散された状態で車両後方へ照出され、レンズ2の灯光を行う。   In the tail lamp (LED light source unit) 1 provided with the light guide 5 described above, when the LED 4 is turned on, the illumination light of the LED 4 is reflected / curved on the curved surface of the curved portion 11 and the inner surface of the curved convex portion 12. The light is refracted and travels through the first light guide 7 as parallel lines parallel to the α direction. The illumination light guided to the first light guide unit 7 is internally reflected by the reflection surface 8 and travels in the second light guide unit 9 while changing the traveling direction in the β direction. The illumination light guided to the second light guide unit 9 is emitted toward the rear of the vehicle while being diffused by the step-like diffusion prism surface 13 formed at the lens side end of the second light guide unit 9. The lens 2 is lit.
上述したような導光体5を用いることによって、レンズ2が光軸方向に対して傾斜して設置される場合であっても、平板状のLED基板(LED平面基板3)を用いて照明光を光軸方向に照出することができる。   By using the light guide 5 as described above, even if the lens 2 is installed inclined with respect to the optical axis direction, illumination light is emitted using a flat LED substrate (LED flat substrate 3). Can be projected in the optical axis direction.
また、LED平面基板3をレンズ2とほぼ平行にして取り付けることができるので、レンズ2とLED平面基板3との間隔を最小限にすることができ、灯具の小型化を図ることが容易となる。さらに、LED基板を階段状に形成する必要が無いので、コストの低減を図ることが容易となる。   In addition, since the LED flat substrate 3 can be mounted substantially parallel to the lens 2, the distance between the lens 2 and the LED flat substrate 3 can be minimized, and the lamp can be easily downsized. . Furthermore, since it is not necessary to form the LED substrate in a step shape, it becomes easy to reduce the cost.
以上、本発明に係るLED光源ユニットを、図面を用いて説明したが、本発明に係るLED光源ユニット及び導光体は、上述したものに限定されるものではない。例えば、導光体のレンズ側端部に形成された階段状の拡散プリズム面を設けずに平面状態とすることによって、LEDの照明光を拡散させることなく車両後方に照出させることが可能となる。   As mentioned above, although the LED light source unit which concerns on this invention was demonstrated using drawing, the LED light source unit and light guide which concern on this invention are not limited to what was mentioned above. For example, by providing a planar state without providing a step-like diffusion prism surface formed at the lens side end of the light guide, it is possible to illuminate the rear of the vehicle without diffusing the illumination light of the LED Become.
また、本発明に係る導光体及びLED光源ユニットは、光軸方向が車両後方となるテールランプに用いられる場合に限定されるものではなく、光軸方向が車両後方以外の方向を示す光源ユニット、例えばクリアランスランプ等に用いるものであっても良い。   Further, the light guide and the LED light source unit according to the present invention are not limited to the case where the optical axis direction is used for a tail lamp whose rear side is the vehicle, and the light source unit indicates a direction other than the rear side of the vehicle, For example, it may be used for a clearance lamp or the like.
本発明に係るLED光源ユニットを示した平面図である。It is the top view which showed the LED light source unit which concerns on this invention. 本発明に係る導光体を示す拡大平面図である。It is an enlarged plan view which shows the light guide which concerns on this invention. 本発明に係る導光体を示す斜視図である。It is a perspective view which shows the light guide which concerns on this invention.
符号の説明Explanation of symbols
1 テールランプ(LED光源ユニット)
2 レンズ
3 LED平面基板
4 LED
5 導光体
7 第1導光部
8 反射面
9 第2導光部
13 拡散プリズム
1 Tail lamp (LED light source unit)
2 Lens 3 LED flat substrate 4 LED
5 Light Guide 7 First Light Guide 8 Reflecting Surface 9 Second Light Guide 13 Diffusion Prism

Claims (3)

  1. 車外に照出される照明光の光軸に対して傾斜させて車両に設置されるレンズと、複数のLEDが設けられて前記レンズにほぼ平行に設置されるLED平面基板との間に設けられ、
    前記LEDより発せられた照明光を前記LED平面基板に垂直な方向へ導光する第1導光部と、該第1導光部により導光された照明光を前記光軸の光軸方向に反射する反射面と、該反射面で反射された照明光を前記光軸方向へ導光する第2導光部とを有することを特徴とする導光体。
    Inclined with respect to the optical axis of the illumination light emitted outside the vehicle, provided between the lens installed in the vehicle and the LED flat substrate provided with a plurality of LEDs and installed substantially parallel to the lens,
    A first light guide for guiding the illumination light emitted from the LED in a direction perpendicular to the LED planar substrate; and the illumination light guided by the first light guide in the optical axis direction of the optical axis. A light guide comprising: a reflective surface that reflects; and a second light guide that guides illumination light reflected by the reflective surface in the optical axis direction.
  2. 前記レンズは前記光軸に垂直な方向に対してθだけ傾斜して設置され、
    前記反射面は、前記光軸に対してθ/2だけ傾斜して形成されることを特徴とする請求項1に記載の導光体。
    The lens is installed with an inclination of θ with respect to a direction perpendicular to the optical axis,
    The light guide according to claim 1, wherein the reflection surface is formed to be inclined by θ / 2 with respect to the optical axis.
  3. 車外に照出される照明光の光軸に対して傾斜させて車両に設置されるレンズと、複数のLEDが設けられて前記レンズにほぼ平行に設置されるLED平面基板と、前記LEDより発せられる照明光を前記光軸の光軸方向へ導く導光体とを有し、
    該導光体は、前記LEDより発せられた照明光を前記LED平面基板に垂直な方向へ導光する第1導光部と、該第1導光部により導光された照明光を前記光軸方向に反射する反射面と、該反射面で反射された照明光を前記光軸方向へ導光する第2導光部とを有することを特徴とするLED光源ユニット。
    A lens installed on the vehicle inclined with respect to the optical axis of the illumination light emitted outside the vehicle, an LED flat substrate provided with a plurality of LEDs and installed substantially parallel to the lenses, and emitted from the LEDs A light guide for guiding illumination light in the optical axis direction of the optical axis,
    The light guide includes a first light guide unit that guides illumination light emitted from the LEDs in a direction perpendicular to the LED flat substrate, and illumination light guided by the first light guide unit. An LED light source unit comprising: a reflective surface that reflects in an axial direction; and a second light guide unit that guides illumination light reflected by the reflective surface in the optical axis direction.
JP2004237059A 2004-08-17 2004-08-17 Light guide and led light source unit equipped with it Pending JP2006059541A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
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JP2007280689A (en) * 2006-04-04 2007-10-25 Koito Mfg Co Ltd Vehicle lighting tool
JP2008010227A (en) * 2006-06-28 2008-01-17 Koito Mfg Co Ltd Vehicle lamp
JP2008123718A (en) * 2006-11-08 2008-05-29 Ichikoh Ind Ltd Vehicular lighting fixture
JP2008293797A (en) * 2007-05-24 2008-12-04 Stanley Electric Co Ltd Lighting device and lens body
JP2015008081A (en) * 2013-06-25 2015-01-15 スタンレー電気株式会社 Led light source unit with light guide body and lighting apparatus with light guide body
FR3008778A1 (en) * 2013-07-22 2015-01-23 Renault Sa LIGHTING SYSTEM, IN PARTICULAR FOR A MOTOR VEHICLE LIGHTING BODY, WITH A PRINTED CIRCUIT BOARD IN RELATION TO THE DIRECTION OF LIGHTING
US9285531B2 (en) 2008-08-08 2016-03-15 3M Innovative Properties Company Lightguide having a viscoelastic layer for managing light
EP2363738A3 (en) * 2010-02-24 2016-04-13 Stanley Electric Co., Ltd. Lighting device for vehicle
US10228507B2 (en) 2008-07-10 2019-03-12 3M Innovative Properties Company Light source and optical article including viscoelastic lightguide disposed on a substrate

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007280689A (en) * 2006-04-04 2007-10-25 Koito Mfg Co Ltd Vehicle lighting tool
JP4683648B2 (en) * 2006-04-04 2011-05-18 株式会社小糸製作所 Vehicle lamp
JP2008010227A (en) * 2006-06-28 2008-01-17 Koito Mfg Co Ltd Vehicle lamp
JP2008123718A (en) * 2006-11-08 2008-05-29 Ichikoh Ind Ltd Vehicular lighting fixture
JP2008293797A (en) * 2007-05-24 2008-12-04 Stanley Electric Co Ltd Lighting device and lens body
US10228507B2 (en) 2008-07-10 2019-03-12 3M Innovative Properties Company Light source and optical article including viscoelastic lightguide disposed on a substrate
US9285531B2 (en) 2008-08-08 2016-03-15 3M Innovative Properties Company Lightguide having a viscoelastic layer for managing light
EP2363738A3 (en) * 2010-02-24 2016-04-13 Stanley Electric Co., Ltd. Lighting device for vehicle
JP2015008081A (en) * 2013-06-25 2015-01-15 スタンレー電気株式会社 Led light source unit with light guide body and lighting apparatus with light guide body
FR3008778A1 (en) * 2013-07-22 2015-01-23 Renault Sa LIGHTING SYSTEM, IN PARTICULAR FOR A MOTOR VEHICLE LIGHTING BODY, WITH A PRINTED CIRCUIT BOARD IN RELATION TO THE DIRECTION OF LIGHTING
WO2015011378A1 (en) * 2013-07-22 2015-01-29 Renault Lighting system, in particular for a motor vehicle lighting member, comprising a printed circuit board inclined in relation to the lighting direction
CN105492254A (en) * 2013-07-22 2016-04-13 雷诺股份公司 Lighting system, in particular for a motor vehicle lighting member, comprising a printed circuit board inclined in relation to the lighting direction

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