JP2010232044A - 車両用灯具 - Google Patents
車両用灯具 Download PDFInfo
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- JP2010232044A JP2010232044A JP2009079054A JP2009079054A JP2010232044A JP 2010232044 A JP2010232044 A JP 2010232044A JP 2009079054 A JP2009079054 A JP 2009079054A JP 2009079054 A JP2009079054 A JP 2009079054A JP 2010232044 A JP2010232044 A JP 2010232044A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/18—Combination of light sources of different types or shapes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/16—Laser light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
すれ違いビーム用の配光パターンを形成するLED光源を用いた車両用灯具のカットオフ近傍に輝度が高い光源を配置し、遠方視認性の高い安全な車両用灯具を提供すること。
【解決手段】
すれ違いビーム用の配光パターンを形成するLED光源5と、レーザー光源7からの光を受けて発光することにより配光パターンのカットオフ近傍へ光を照射するレーザー用蛍光体6と、により構成される発光部2を備えることによりカットオフ部の輝度を向上させる。
【選択図】図1
Description
発光サイズ縦0.5mm、横2.5mmのレーザー励起発光方式の平均輝度は58.6Mnitと最も高い輝度を示す。発光サイズ縦1.0mm、横4.4mmの白色LED発光方式の平均輝度は21.7Mnitで最も低く、発光サイズ縦0.5mm、横4.4mmのHID方式の平均輝度は45.6Mnitと前者両タイプの中間値となる。図9にレーザー励起発光方式の発光面積と平均輝度との相関グラフを示す。図9には、図8に示す3方式の発光サイズに対する平均輝度もプロットしている。図9よりレーザー励起発光方式は発光面積が小さくなるほど平均輝度は高くなるため、カットオフ近傍の輝度を高めたい本発明の目的に適合した細長く高輝度な光源に適していることが分かる。白色LED発光方式は発光面積が大きいのに対して平均輝度が低く、HID方式の平均輝度は比較的高いが発光面積をこれ以上小さくすることが出来ない。また、両方式共に発光面積が増えるほど光束が落ちるため、レーザー励起発光方式のように平均輝度が増加することがない。このように本実施の形態のレーザー励起発光方式のみが、図10(A)に示すLED光源5のみと比べ図10(B)に示すように高輝度の光をカットオフ部へ照射してカットオフ部に高輝度領域Hを形成して遠方視認性が高い配光を形成する。
Claims (7)
- すれ違いビーム用の配光パターンを形成するLED光源と、
レーザー光源からの光を受けて発光することにより前記配光パターンのカットオフ近傍へ光を照射するレーザー光源用蛍光体と、により構成される発光部を備えたことを特徴とする車両用灯具。 - 前記レーザー光源用蛍光体は平面形状、半円柱形状、三角柱形状、球面形状または放物面形状であることを特徴とする請求項1に記載の車両用灯具。
- 前記LED光源と前記レーザー光源用蛍光体は1つの基板上または個々の基板上に分かれて取り付けられていることを特徴とする請求項1または請求項2に記載の車両用灯具。
- 焦点位置近傍に設けられた前記発光部からの光を拡大投影照射するレンズを備えたことを特徴とする請求項1、2、または3のいずれか1項に記載の車両用灯具。
- 前記発光部と、前記LED光源からの光をすれ違いビーム用の配光パターンの主配光となるように反射し前記レーザー光源用蛍光体からの光をすれ違いビーム用の配光パターンのカットオフ近傍へ反射するリフレクタとを備えており、前記レーザー光源用蛍光体は照射方向に対してLED光源よりも前方に配置されているリフレクタ型灯具であることを特徴とする請求項1、2、または3のいずれか1項に記載の車両用灯具。
- 前記発光部と、レンズと、遮光板と、前記LED光源からの光をすれ違いビーム用の配光パターンの主配光となるように反射し前記レーザー光源用蛍光体からの光をすれ違いビーム用の配光パターンのカットオフ近傍へ反射するリフレクタとを備えており、前記レーザー光源用蛍光体は照射方向に対してLED光源よりも前方に配置されているプロジェクタ型灯具であることを特徴とする請求項1、2、または3のいずれか1項に記載の車両用灯具。
- 前記発光部の直近もしくは直上にはカットオフラインを形成する遮光板が配置されていることを特徴とする請求項1、2、3、4、または5のいずれか1項に記載の車両用灯具。
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JP2009079054A JP5266605B2 (ja) | 2009-03-27 | 2009-03-27 | 車両用灯具 |
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