JP4123564B2 - Vehicle signal lights - Google Patents

Vehicle signal lights Download PDF

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Publication number
JP4123564B2
JP4123564B2 JP11698198A JP11698198A JP4123564B2 JP 4123564 B2 JP4123564 B2 JP 4123564B2 JP 11698198 A JP11698198 A JP 11698198A JP 11698198 A JP11698198 A JP 11698198A JP 4123564 B2 JP4123564 B2 JP 4123564B2
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JP
Japan
Prior art keywords
side wall
signal lamp
reflecting surface
reflection surface
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP11698198A
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Japanese (ja)
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JPH11306809A (en
Inventor
俊弘 青山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
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Stanley Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to JP11698198A priority Critical patent/JP4123564B2/en
Publication of JPH11306809A publication Critical patent/JPH11306809A/en
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Anticipated expiration legal-status Critical
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Description

【0001】
【発明の属する技術分野】
本発明は、ストップランプ、テールランプあるいはターンシグナルランプなど車両の信号用灯具に関するものであり、詳細には前記信号用灯具において照射効率を向上させるための反射面の構成に係るものである。
【0002】
【従来の技術】
従来のこの種の車両用信号灯具の構成の例を、複合反射面91を採用した車両用信号灯具90の例で示すものが図5であり、複合反射面91は前記車両用信号灯具90の車両への取付状態における垂直方向の断面には光源93を焦点とする放物面が表れ、図示の水平方向への断面には凸の円弧92aが表れるユニット反射面92の複数個の複合とし形成されている。
【0003】
このように形成することで、前記車両用信号灯具90からの照射光は水平方向に拡散され、垂直方向には略平行光線に収束されるものとなり、車両用信号灯具90に要求される配光特性をほヾ満足するものとなるので、レンズ94に施すレンズカット(図示は省略する)は不要、もしくは、軽微なものとすることができ、透明感が高く、奥行感があり外観に優れる車両用信号灯具90の実現を可能とするものである。
【0004】
【発明が解決しようとする課題】
しかしながら、上記の構成とした車両用信号灯具90においては、灯具の構成上で奥まった位置にある複合反射面91(ユニット反射面92)で水平方向に光を拡散するものであるので、反射光の一部が複合反射面91とレンズ94とを接続するために設けられている側壁95に当接し、無効となる光を生じるものとなる。
【0005】
このときに、前記ユニット反射面92は、それぞれが水平方向への断面が凸の円弧92aとして形成されているものであるので、ユニット反射面92の複数のものが無効となる光を生じるものとなり、これを更に詳細に観察すれば、複数のユニット反射面92の上記した凸の円弧92aの一部に無効となる光を生じる無効部分92bが存在するものとなる。
【0006】
また、ユニット反射面92の各々を観察してみると、図6に示すように、ユニット反射面92同士を接続するための接続用側壁96も必要となり、この接続用側壁96に対しても反射光が当接する無効部分92bも生じ、結果として、複合反射面91を採用した車両用信号灯具90においては、光源93に対する光束利用率が低下し、暗い灯具となる問題点を生じ、この点の解決が課題とされるものとなっていた。
【0007】
【課題を解決するための手段】
本発明は前記した従来の課題を解決するための具体的な手段として、反射面の一部に反射光が側壁と干渉する無効部分を生じる車両用信号灯具において、前記無効部分には反射光を前記側壁と略平行方向もしくはこの灯具の光軸方向として反射し、水平方向の断面で光源を略焦点とする放物線又は前記光源を第一焦点とし前記光軸の近傍を第二焦点とする楕円の何れかから成る補正反射面が設けられていることを特徴とする車両用信号灯具、及び、前記反射面が複数のユニット反射面が複合された複合反射面であり、前記補正反射面がそれぞれのユニット反射面の前記無効部分に対して設けられていることを特徴とする車両用信号灯具を提供することで課題を解決するものである。
【0008】
【発明の実施の形態】
つぎに、本発明を図に示す実施形態に基づいて詳細に説明する。図1および図2に符号1で示すものは本発明に係る車両用信号灯具であり、図1は車両用信号灯具1の全体図、図2はその車両用信号灯具1の要部を拡大して示すの詳細図である。
【0009】
この車両用信号灯具1は反射面が、車両用信号灯具1の車両への取付状態における垂直方向の断面には光源4を焦点とする放物面が表れ、水平方向への断面には凸の円弧3aが表れるユニット反射面3の複数個の複合とされた複合反射面2として形成されるものである点は従来例のものと同様である。
【0010】
従って、前記複合反射面2を構成するユニット反射面3の内には、前記複合反射面2とレンズ5とを接続させるための側壁6に反射光が当接してしまう無効部分3bを生じる可能性があり、また、ユニット反射面3同士を接続するための接続用側壁7に対しても無効部分3bを生じる可能性があるものである点も従来例のものと同様である。
【0011】
本発明では前記側壁6および接続用側壁7による無効部分3bに対応する位置に補正反射面8を設けるものである。尚、以下の説明においては、側壁6による無効部分3bに設ける補正反射面8も、接続用側壁7による無効部分3bに設ける補正反射面8も設けるための手法は同一であるので、説明の煩雑化を避けるために特に異なる部分を除き両者は一括して説明する。
【0012】
この実施形態においては前記補正反射面8は、水平方向の断面を光源4を略焦点とする放物線として形成される。形成時において、前記側壁6および接続用側壁7を含み前記複合反射面2は樹脂成形、プレス成形など金型で形成されるものであり、また金型の抜き方向Xは複合反射面2の光軸Z(図1参照)と一致している場合が通常であるので、前記側壁6および接続用側壁7は光軸Zと略平行な状態となっている。
【0013】
従って、従来は無効部分3bと成っていた部分を光源4を略焦点とする放物線とした補正反射面8で形成することで、この補正反射面8に当接した光源4からの光は前記側壁6および接続用側壁7と平行方向、言い換えれば、複合反射面2の光軸Zと平行方向に反射するものとなり、即ち、側壁6および接続用側壁7に当接することはなく照射方向へ向かうものとなり、光量の損失を生じないものとすることが可能となる。
【0014】
尚、本発明においては、上記補正反射面8の水平方向断面に表れる形状は、上記の放物線に限定されるものではなく、図示は省略するが、例えば光源4を第一焦点とし、光軸Zの近傍を第二焦点とする楕円としても良く、この場合には、前記補正反射面8の反射光は、一旦、第二焦点に向かうものとなるので、上記と同様に側壁6および接続用側壁7に当接することはなくなる。
【0015】
図3は本発明の別の実施形態であり、前の実施形態では複合反射面2は水平方向への断面にのみ凸の円弧が表れるユニット反射面3が複合されるものとして説明したが、この実施形態では水平方向の断面にも、垂直方向への断面にも凸の円弧9aが表れる略方形のユニット反射面9が縦横に接続されて複合反射面2が形成されている。
【0016】
この場合には各ユニット反射面9の垂直方向および水平方向の双方に側壁6、接続用側壁7の何れか、または双方が存在するものとなるので、上記した無効部分9bもユニット反射面9の上記二方向に生じるものとなる。従って、この実施形態の複合反射面2においては、補正反射面8は必要に応じて垂直方向および水平方向の二方向に設けられるものとなる。
【0017】
図4は本発明の更に別の実施形態であり、上記の何れの実施形態も複合反射面2に対して実施した例で説明したが、本発明は反射面10が例えば回転放物面10aなど一面で形成されている場合にも実施が可能である。例えば、車体への取付時の制約により、回転放物面の反射面10であっても、この反射面10の光軸Zと、金型からの抜き方向Xとが一致しない場合がある。
【0018】
この場合には、側壁6は抜き方向Xに対し略平行として形成されるものとなるので、光軸Zと平行な反射光を生じる反射面10の一部には無効部分10bを生じるものとなる。従って、この実施形態においても前記無効部分10aに相当する部分に、例えば抜き方向Xと平行な光軸を有する回転放物面などの補正反射面8を形成すれば、この補正反射面8からの反射光は側壁6と平行方向となり当接が回避されて、光量の損失を生じないものとすることが可能となる。
【0019】
【発明の効果】
以上に説明したように本発明により、無効部分には反射光を前記側壁と略平行方向もしくはこの灯具の光軸方向として反射し、水平方向の断面で光源を略焦点とする放物線又は前記光源を第一焦点とし前記光軸の近傍を第二焦点とする楕円の何れかから成る補正反射面が設けられている車両用信号灯具としたことで、従来は側壁に当接し灯具の照射光として使用されることのない無効部分の光も利用できるものとして、外観を損なうことなく明るい灯具の実現を可能とし、この種の車両用信号灯具の性能向上に極めて優れた効果を奏するものである。
【図面の簡単な説明】
【図1】 本発明に係る車両用信号灯具の実施形態を示す断面図である。
【図2】 同じ実施形態の要部を示す断面図である。
【図3】 同じく本発明に係る車両用信号灯具の別の実施形態を示す説明図である。
【図4】 同じく本発明に係る車両用信号灯具の更に別の実施形態を示す断面図である。
【図5】 従来例を示す断面図である。
【図6】 従来例を要部で示す断面図である。
【符号の説明】
1……車両用信号灯具
2……複合反射面
3、9……ユニット反射面
3a、9a……円弧
3b、9b……無効部分
4……光源
5……レンズ
6……側壁
7……接続用側壁
8……補正反射面
10……反射面
10a……回転放物面
10b……無効部分
Z……光軸
X……抜き方向
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular signal lamp such as a stop lamp, a tail lamp, or a turn signal lamp, and particularly relates to a configuration of a reflecting surface for improving irradiation efficiency in the signal lamp.
[0002]
[Prior art]
FIG. 5 shows an example of the configuration of a conventional vehicle signal lamp of this type as an example of a vehicle signal lamp 90 that employs a composite reflection surface 91, and the composite reflection surface 91 is formed of the vehicle signal lamp 90. A parabolic surface with the light source 93 as a focal point appears in the vertical cross section in the state where it is mounted on the vehicle, and a plurality of unit reflecting surfaces 92 in which a convex arc 92a appears in the horizontal cross section shown in FIG. Has been.
[0003]
By forming in this way, the irradiation light from the vehicle signal lamp 90 is diffused in the horizontal direction and converged into substantially parallel light beams in the vertical direction, and the light distribution required for the vehicle signal lamp 90 Since the lens will satisfy the characteristics, a lens cut (not shown) applied to the lens 94 is unnecessary or can be made light, and has a high transparency and a sense of depth and an excellent appearance. It is possible to realize the signal lamp 90 for use.
[0004]
[Problems to be solved by the invention]
However, in the vehicular signal lamp 90 having the above-described configuration, the light is diffused in the horizontal direction by the composite reflection surface 91 (unit reflection surface 92) located at a deep position in the configuration of the lamp. A part of the light abuts against a side wall 95 provided to connect the composite reflecting surface 91 and the lens 94, and invalid light is generated.
[0005]
At this time, each of the unit reflecting surfaces 92 is formed as a circular arc 92a having a convex cross section in the horizontal direction, so that a plurality of unit reflecting surfaces 92 generate light that becomes invalid. If this is observed in more detail, an ineffective portion 92b that generates ineffective light is present in a part of the convex arc 92a of the plurality of unit reflecting surfaces 92 described above.
[0006]
Further, when each of the unit reflection surfaces 92 is observed, a connection side wall 96 for connecting the unit reflection surfaces 92 to each other is required as shown in FIG. As a result, the ineffective portion 92b with which the light abuts is also generated, and as a result, in the vehicle signal lamp 90 adopting the composite reflecting surface 91, the luminous flux utilization rate with respect to the light source 93 is lowered, resulting in a problem of becoming a dark lamp. The solution was a problem.
[0007]
[Means for Solving the Problems]
As a specific means for solving the above-described conventional problems, the present invention provides a vehicular signal lamp that generates an ineffective portion where reflected light interferes with a side wall on a part of a reflecting surface. Reflected as a direction substantially parallel to the side wall or the optical axis direction of the lamp, and a parabola having a light source as a substantially focal point in a horizontal section or an ellipse having the light source as a first focal point and the vicinity of the optical axis as a second focal point A signal lamp for a vehicle characterized in that a correction reflection surface made of any one of the above is provided, and the reflection surface is a composite reflection surface in which a plurality of unit reflection surfaces are combined. The problem is solved by providing a vehicular signal lamp characterized by being provided for the invalid portion of the unit reflection surface.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Below, this invention is demonstrated in detail based on embodiment shown in a figure. 1 and FIG. 2 shows a vehicle signal lamp according to the present invention, FIG. 1 is an overall view of the vehicle signal lamp 1, and FIG. 2 is an enlarged view of a main part of the vehicle signal lamp 1. FIG.
[0009]
The vehicular signal lamp 1 has a reflecting surface, a parabolic surface focusing on the light source 4 appears in a vertical section when the vehicular signal lamp 1 is mounted on the vehicle, and a convex section in the horizontal section. It is the same as that of the conventional example in that it is formed as a composite reflection surface 2 that is a plurality of composites of the unit reflection surface 3 in which the arc 3a appears.
[0010]
Therefore, there is a possibility that an ineffective portion 3b in which the reflected light comes into contact with the side wall 6 for connecting the composite reflective surface 2 and the lens 5 is generated in the unit reflective surface 3 constituting the composite reflective surface 2. In addition, it is the same as that of the conventional example in that there is a possibility that the ineffective portion 3b may be generated on the connecting side wall 7 for connecting the unit reflecting surfaces 3 to each other.
[0011]
In the present invention, the correction reflecting surface 8 is provided at a position corresponding to the ineffective portion 3 b formed by the side wall 6 and the connecting side wall 7. In the following description, since the method for providing the correction reflection surface 8 provided on the invalid portion 3b by the side wall 6 and the correction reflection surface 8 provided on the invalid portion 3b by the connection side wall 7 are the same, the description is complicated. In order to avoid conversion, both will be explained together except for different parts.
[0012]
In this embodiment, the correction reflecting surface 8 is formed as a parabola whose horizontal cross section is substantially focused on the light source 4. At the time of formation, the composite reflecting surface 2 including the side wall 6 and the connecting side wall 7 is formed by a mold such as resin molding or press molding, and the mold drawing direction X is the light of the composite reflecting surface 2. Since it is normal to coincide with the axis Z (see FIG. 1), the side wall 6 and the connecting side wall 7 are substantially parallel to the optical axis Z.
[0013]
Therefore, by forming the portion which has conventionally become the ineffective portion 3b with the correction reflection surface 8 having a parabola with the light source 4 as a focal point, the light from the light source 4 in contact with the correction reflection surface 8 is transmitted through the side wall. 6 and the connecting side wall 7 in a direction parallel to the optical axis Z of the composite reflecting surface 2, that is, in the direction of irradiation without contacting the side wall 6 and the connecting side wall 7. Thus, it is possible to prevent loss of light quantity.
[0014]
In the present invention, the shape appearing in the horizontal cross section of the correction reflecting surface 8 is not limited to the parabola, and is not shown. For example, the light source 4 is the first focal point, and the optical axis Z In this case, the reflected light of the correction reflecting surface 8 is once directed to the second focal point, so that the side wall 6 and the connecting side wall are the same as described above. 7 no longer abuts.
[0015]
FIG. 3 shows another embodiment of the present invention. In the previous embodiment, the composite reflecting surface 2 has been described as a unit reflecting surface 3 in which a convex arc appears only in a cross section in the horizontal direction. In the embodiment, the substantially square unit reflecting surface 9 in which the convex arc 9a appears in both the horizontal cross section and the vertical cross section is connected vertically and horizontally to form the composite reflecting surface 2.
[0016]
In this case, since either or both of the side wall 6 and the connecting side wall 7 exist in both the vertical direction and the horizontal direction of each unit reflecting surface 9, the above-described invalid portion 9 b is also included in the unit reflecting surface 9. It occurs in the above two directions. Therefore, in the composite reflecting surface 2 of this embodiment, the correction reflecting surface 8 is provided in two directions, the vertical direction and the horizontal direction, as necessary.
[0017]
FIG. 4 shows still another embodiment of the present invention, and any of the above embodiments has been described with respect to the composite reflecting surface 2. However, in the present invention, the reflecting surface 10 is, for example, a rotating paraboloid 10a. It can also be implemented when it is formed on one side. For example, the optical axis Z of the reflecting surface 10 and the extraction direction X from the mold may not coincide with each other even when the reflecting surface 10 is a paraboloidal surface due to restrictions during attachment to the vehicle body.
[0018]
In this case, since the side wall 6 is formed substantially parallel to the drawing direction X, an ineffective portion 10b is generated in a part of the reflection surface 10 that generates reflected light parallel to the optical axis Z. . Therefore, also in this embodiment, if a correction reflecting surface 8 such as a rotating paraboloid having an optical axis parallel to the drawing direction X is formed in a portion corresponding to the invalid portion 10a, the correction reflecting surface 8 The reflected light is parallel to the side wall 6 and contact is avoided, so that it is possible to prevent loss of light quantity.
[0019]
【The invention's effect】
As described above, according to the present invention, the ineffective portion reflects the reflected light in a direction substantially parallel to the side wall or the optical axis direction of the lamp, and a parabola or the light source having a light source as a substantially focal point in a horizontal section. The vehicle signal lamp is provided with a correction reflecting surface composed of an ellipse having a first focal point and the vicinity of the optical axis as a second focal point . Conventionally, it is in contact with the side wall and used as illumination light for the lamp. As a result, it is possible to use a light of an ineffective portion that is not used, so that a bright lamp can be realized without impairing the appearance, and the performance of this type of vehicle signal lamp is greatly improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a vehicular signal lamp according to the present invention.
FIG. 2 is a cross-sectional view showing a main part of the same embodiment.
FIG. 3 is an explanatory view showing another embodiment of the vehicular signal lamp according to the present invention.
FIG. 4 is a cross-sectional view showing still another embodiment of the vehicular signal lamp according to the present invention.
FIG. 5 is a cross-sectional view showing a conventional example.
FIG. 6 is a cross-sectional view showing a main part of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Vehicle signal lamp 2 ... Compound reflective surface 3, 9 ... Unit reflective surface 3a, 9a ... Arc 3b, 9b ... Invalid part 4 ... Light source 5 ... Lens 6 ... Side wall 7 ... Connection Side wall 8 …… Correction reflective surface 10 …… Reflection surface 10a …… Rotating paraboloid 10b …… Invalid part Z …… Optical axis X …… Drawing direction

Claims (2)

反射面の一部に反射光が側壁と干渉する無効部分を生じる車両用信号灯具において、前記無効部分には反射光を前記側壁と略平行方向もしくはこの灯具の光軸方向として反射し、水平方向の断面で光源を略焦点とする放物線又は前記光源を第一焦点とし前記光軸の近傍を第二焦点とする楕円の何れかから成る補正反射面が設けられていることを特徴とする車両用信号灯具。In a vehicular signal lamp that generates an ineffective portion where reflected light interferes with a side wall on a part of the reflecting surface, the ineffective portion reflects the reflected light in a direction substantially parallel to the side wall or in the optical axis direction of the lamp , and in a horizontal direction. And a correction reflecting surface comprising a parabola having a light source as a substantially focal point or an ellipse having the light source as a first focus and the vicinity of the optical axis as a second focus . Signal lamp. 前記反射面が複数のユニット反射面が複合された複合反射面であり、前記補正反射面がそれぞれのユニット反射面の前記無効部分に対して設けられていることを特徴とする請求項1記載の車両用信号灯具。2. The reflection surface according to claim 1, wherein the reflection surface is a composite reflection surface in which a plurality of unit reflection surfaces are combined, and the correction reflection surface is provided for the invalid portion of each unit reflection surface. Signal lamp for vehicles.
JP11698198A 1998-04-27 1998-04-27 Vehicle signal lights Expired - Fee Related JP4123564B2 (en)

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JP4123564B2 true JP4123564B2 (en) 2008-07-23

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CN110657399A (en) * 2018-06-29 2020-01-07 法雷奥市光(中国)车灯有限公司 Light distribution member, lighting or signal indicating device and motor vehicle

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