LED vehicle lamp including reflector with paraboloidal sections
First Claim
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1. A vehicle lamp comprising:
- a light emitting diode that emits light;
a lamp lens having a light emission area;
a plurality of reflection surfaces that reflect the light emitted by the light emitting diode;
a plurality of mirror finished surfaces that are arranged so as not to reflect the light emitted by the light emitting diode but to reflect an outside light incident from the lamp lens; and
an inner housing having an inner surface facing the light emission area, whereinthe reflection surfaces and the mirror finished surfaces are alternately provided over the inner surface of the inner housing,the reflection surfaces are arranged mostly within a range of an illumination angle of the light emitted by the light emitting diode,each of the reflection surfaces is a part of a rotational paraboloid having a focus on a light emission source of the light emitting diode such that the paraboloids corresponding to the reflection surfaces that are farther from the light emitting diode have longer focal lengths, andeach of the mirror finished surfaces is arranged to follow along and parallel to a segment that connects the light emission source of the light emitting diode to one of boundaries between the reflection surfaces and the mirror finished surfaces.
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Accused Products
Abstract
A vehicle lamp includes a set of alternatively provided first and second reflection surfaces that reflect the light emitted by a first and second respective diodes toward a lamp lens. Each of the first and second reflection surface is a part of a rotational paraboloid having a focus on a light emission source of a respective one of the first and second diodes such that the paraboloids corresponding to reflection surfaces that are farther from the their respective diodes have longer focal lengths.
45 Citations
19 Claims
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1. A vehicle lamp comprising:
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a light emitting diode that emits light; a lamp lens having a light emission area; a plurality of reflection surfaces that reflect the light emitted by the light emitting diode; a plurality of mirror finished surfaces that are arranged so as not to reflect the light emitted by the light emitting diode but to reflect an outside light incident from the lamp lens; and an inner housing having an inner surface facing the light emission area, wherein the reflection surfaces and the mirror finished surfaces are alternately provided over the inner surface of the inner housing, the reflection surfaces are arranged mostly within a range of an illumination angle of the light emitted by the light emitting diode, each of the reflection surfaces is a part of a rotational paraboloid having a focus on a light emission source of the light emitting diode such that the paraboloids corresponding to the reflection surfaces that are farther from the light emitting diode have longer focal lengths, and each of the mirror finished surfaces is arranged to follow along and parallel to a segment that connects the light emission source of the light emitting diode to one of boundaries between the reflection surfaces and the mirror finished surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vehicle lamp comprising:
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at least one light emitting diode that emits light; a lamp lens having a light emission area; a plurality of reflection surfaces that reflect the light emitted by the at least one light emitting diode; a plurality of mirror finished surfaces arranged so as not to reflect the light emitted by the light emitting diode but to reflect a light incident from outside the lamp lens; and an inner housing having an inner surface facing the light emission area, wherein the reflection surfaces and the mirror finished surfaces are alternately provided over the inner surface of the inner housing, the reflection surfaces are arranged mostly within a range of an illumination angle of the light emitted by the at least one light emitting diode, each of the reflection surfaces is defined by a rotational paraboloid having a focus on a light emission source of the at least one light emitting diode such that the paraboloids corresponding to the reflection surfaces that are farther from the at least one light emitting diode have longer focal lengths, and each of the mirror finished surfaces is arranged to follow along and parallel to a segment that connects the light emission source of the at least one light emitting diode to one of boundaries between the reflection surfaces and the mirror finished surfaces. - View Dependent Claims (12)
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13. A vehicle lamp comprising:
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a first light emitting diode that is arranged at a first location and that emits light in a first area; a second light emitting diode that is arranged at a second location different from the first location and that emits light in a second area; a lamp lens having a light emission area; a plurality of first reflection surfaces that reflect the light emitted by the first light emitting diode toward the lamp lens; a plurality of second reflection surfaces that reflect light emitted by the second light emitting diode toward the lamp lens; a plurality of first linear Fresnel prism elements arranged between the first light emitting diode and the first reflection surfaces; a plurality of second linear Fresnel prism elements arranged between the second light emitting diode and the second reflection surfaces; and an inner housing having an inner surface facing the light emission area, wherein the first reflection surfaces and the second reflection surfaces are alternately provided over almost entire of the inner surface of the inner housing, the first reflection surfaces are arranged mostly in the first area, the second reflection surfaces are arranged mostly in the second area, each of the first reflection surfaces is a part of a rotational paraboloid having a focus on a light emission source of the first light emitting diode such that the paraboloids corresponding to the first reflection surfaces that are farther from the first light emitting diode have longer focal lengths, and each of the second reflection surfaces is a part of a rotational paraboloid having a focus on a light emission source of the second light emitting diode such that the paraboloids corresponding to the second reflection surfaces that are farther from the second light emitting diode have longer focal lengths, wherein the first linear Fresnel prism elements transmit the light emitted by the first light emitting diode mostly along the direction the light is emitted in a cross section that includes the first light emitting diode and the first reflection surfaces, and refract and transmit the light emitted by the first light emitting diode as almost parallel light in a cross section orthogonal to a light reflection direction of the first reflection surfaces, and the second linear Fresnel prism elements transmit the light emitted by the second light emitting diode mostly along the direction the light is emitted in a cross section that includes the second light emitting diode and the second reflection surfaces, and refract and transmit the light from the second light emitting diode as almost parallel light in a cross section orthogonal to a light reflection direction of the second reflection surfaces. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A vehicle lamp comprising:
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at least one first light emitting diode arranged at a first location and that emits light in a first area; at least one second light emitting diode arranged at a second location different from the first location and that emits light in a second area; a lamp lens having a light emission area; a plurality of first reflection surfaces that reflect the light emitted by the at least one first light emitting diode toward the lamp lens; a plurality of second reflection surfaces that reflect light emitted by the at least one second light emitting diode toward the lamp lens; and an inner housing having an inner surface facing the light emission area, wherein the first reflection surfaces and the second reflection surfaces are alternately provided over the inner surface of the inner housing, the first reflection surfaces are arranged in the first area, the second reflection surfaces are arranged in the second area, each of the first reflection surfaces is defined by a rotational paraboloid having a focus on a light emission source of the at least one first light emitting diode such that the paraboloids corresponding to the first reflection surfaces that are farther from the at least one first light emitting diodes have longer focal lengths, and each of the second reflection surfaces is defined by a rotational paraboloid having a focus on a light emission source of the at least one second light emitting diode such that the paraboloids corresponding to the second reflection surfaces that are farther from the at least one second light emitting diode have longer focal lengths, wherein the lamp lens includes; an outer lens; and an inner lens, wherein a plurality of at least one of concave portions or convex portions are provided, in portions of the inner lens almost corresponding to ranges in which reflected lights from the first reflection surfaces are incident, respectively, in such a manner that the concave portions recess on an opposite side to a first reflection surfaces-side and the convex portions project on the first reflection surfaces-side, and a plurality of at least one of concave portions or convex portions are provided, in portions of the inner lens almost corresponding to ranges in which reflected lights from the second reflection surfaces are incident, respectively, in such a manner that the convex portions project on a second reflection surfaces-side and the concave portions recess on an opposite side to the second reflection surfaces-side, and the concave portions and the convex portions of the inner lens are alternately provided in the light emission area of the lamp lens almost over the entire light emission area to correspond to the first reflection surfaces and the second reflection surfaces, respectively.
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Specification