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Lens body and respective headlamp for vehicle
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一种透镜体、车辆的技术，应用在车头灯、道路车辆、车辆部件等方向，能够解决光利用效率降低等问题
Active Publication Date: 2018-11-02
STANLEY ELECTRIC CO LTD
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Abstract
Description
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Therefore, there is a problem that the light utilization efficiency decreases due to the loss of light on the reflective surface.
Method used
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no. 1 Embodiment approach
[0044] Next, the lens body 40 and the vehicle lamp 10 having the lens body 40 according to the first embodiment of the present invention will be described with reference to the drawings.
[0045]In the following description, the front-rear direction refers to the front-rear direction of the vehicle on which the lens body 40 or the vehicle lamp 10 is mounted, and the vehicle lamp 10 emits light toward the front. In addition, unless otherwise specified, the front-rear direction refers to one direction in the horizontal plane. In addition, unless otherwise specified, the left-right direction refers to one direction in the horizontal plane, and is a direction perpendicular to the front-rear direction.
[0046] Strictly speaking, extending in the front-rear direction (or extending along the front-rear direction) in this specification includes not only extending in the front-rear direction, but also extending in a direction inclined within a range of less than 45° relative to the fr...
no. 2 Embodiment approach ＞
[0129] Next, the lens body 140 of the second embodiment will be described. Compared with the first embodiment, the lens body 140 of the second embodiment differs mainly in the configurations of the first reflection surface 144 and the output surface 148 . In addition, the same code|symbol is attached|subjected to the structural element of the same form as the above-mentioned embodiment, and the description is abbreviate|omitted.
[0130] Figure 11A with Figure 11B It is a top view of the lens body 140, showing the optical path of the light irradiated from the center point 26a of the light source. Figure 11A with Figure 11B The optical paths of light irradiated in different directions from the light source center point 26 a are respectively shown.
[0131] The lens body 140 has a front and rear reference axis AX 140 Solid polygonal lens body of extended shape. In addition, in this embodiment, the front-rear reference axis AX 140 It is a reference axis extending along...
Embodiment
[0146] Below, the effects of the present invention will be clarified through examples. In addition, this invention is not limited to the following Example, It can change suitably in the range which does not change the summary, and can implement. .
[0147]
[0148] In the vehicle lighting device 10 according to the first embodiment described above, a simulation of a light distribution pattern was performed on a virtual vertical screen facing the lens body 40 in front of the lens body 40 .
[0149] Figure 12A ~ Figure 12C is a light distribution pattern of light irradiated from different regions of the emission surface 48 .
[0150] Figure 12A It is a figure which shows the light distribution pattern P48A of the light irradiated from 48 A of 1st left-right direction emission regions.
[0151] Figure 12B is to show when viewed from the upper side, from the front and rear reference axis AX 40 The diagram of the light distribution pattern P48BL of the light irradiated b...
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Abstract
The invention provides a lens body and respective headlamp for a vehicle. The lens body includes a first reflecting surface totally reflecting entered light, a second reflecting surface totally reflecting at least some of the light totally reflected at the first reflecting surface, and a light emitting surface emitting light passed through forward, wherein the first reflecting surface includes anelliptical spherical shape with reference to a front focal point and a rear focal point disposed parallel with each other in the forward / rearward direction, the rear focal point disposed in a vicinityof a light source, the light emitting surface has a first leftward / rightward emission region and a second leftward / rightward emission region adjacent to the first leftward / rightward emission region in a leftward / rightward direction, the first leftward / rightward emission region refracts the entered light in a direction approaching a forward / rearward reference axis, and the second leftward / rightward emission region refracts at least some of the entered light in a direction getting away from the forward / rearward reference axis.
Description
technical field [0001] The invention relates to a lens body and a vehicle lamp. Background technique [0002] Conventionally, a vehicle lamp combining a light source and a lens body has been proposed (for example, see Japanese Patent No. 4047186). In a vehicle lamp, light from a light source enters the lens body from an incident portion of the lens body, part of the light is reflected by the reflective surface of the lens body, and then the light is emitted from the output surface of the lens body to the outside of the lens body. Contents of the invention [0003] In a conventional vehicle lamp, a metal reflective film (reflective surface) is formed on the surface of a lens body by metal vapor deposition, and light reflected by the metal reflective film is irradiated forward. Therefore, there is a problem in that light loss occurs on the reflective surface, resulting in a decrease in light utilization efficiency. In addition, there is another problem that, in the vehicle...
Claims
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Application Information
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