PROBLEM TO BE SOLVED: To provide a retroreflective license plate that can facilitate both reduction in occurrence of halation in an IR detector and improvement in visibility from drivers of following vehicles.SOLUTION: A retroreflective license plate according to one embodiment of the present invention is the retroreflective license plate that has an identification display, and the retroreflective license plate comprises: a plate base 10; a retroreflective sheet 20 that is provided on the plate base 10, and has a cube corner element 80. In a case where the retroreflective sheet 20 defines an upper part and lower part depending upon a direction of the identification display, when light is incident from a position deviated towards an upper part side from a normal line direction Rx of the retroreflective sheet 20, a retroreflective coefficient decreases as an angle of incidence of the light increases, and the retroreflective coefficient when the angle of incidence of the light forms 20 degrees towards the upper part side is equal to or less than 20 cd/lx/m.SELECTED DRAWING: Figure 1

    【課題】赤外線検出器におけるハレーションの発生の低減と後続車両のドライバーからの視認性の向上とを両立し易くなる再帰性反射ライセンスプレートを提供する。【解決手段】本発明の一形態に係る再帰性反射ライセンスプレートは、識別表示を有する再帰性反射ライセンスプレートであって、プレートベース10と、プレートベース10上に設けられ、且つキューブコーナー素子80を有する再帰性反射シート20と、を備え、再帰性反射シート20は、識別表示の向きにより上部及び下部を規定する場合において、光が当該再帰性反射シート20の法線方向Rxから上部側にずれた位置から入射されるとき、光の入射角が増大するに従って再帰反射係数が減少し、光の入射角が上部側に20度をなすときの再帰反射係数が、20cd/lx/m2以下である。【選択図】図1


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    Title :

    RETROREFLECTIVE LICENSE PLATE AND RETROREFLECTIVE SHEET


    Additional title:

    再帰性反射ライセンスプレート、及び再帰性反射シート


    Contributors:

    Publication date :

    2017-06-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen



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