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US 10,648,636 B2Granted
LED headlamp projection lighting device
AssigneeLumileds Holding B.V.
InventorsFelix Chen, Ping Wu, Meng Han
Life of this patent
Estimating the term…
Abstract
A lighting device includes an LED light source and a concave reflector. The light source is arranged such that light emitted is reflected by the reflector. The shield is arranged in front of the reflector. A projection lens is arranged to project light passing the shield. In order to efficiently use light emitted from the LED light source and to enable a projected illumination beam of high luminous flux, the LED light source is arranged below an optical axis L of the projection lens.
Claims13
Lighting device, comprising at least
- an LED light source,
- a concave reflector comprising a reflector axis, said LED light source being arranged to emit light to be reflected by said reflector,
- a shield being arranged in front of said reflector,
- a projection lens being arranged to project light passing said shield, said projection lens comprising an optical axis,
- wherein the reflector axis is inclined relative to the optical axis
- wherein said LED light source is arranged below the optical axis,
- wherein said shield comprises an upper edge to cut off a portion of said light reflected by said reflector,
- wherein the upper edge of the shield is provided with a first portion, which first portion is horizontal in the direction of the optical axis, and a second portion, which second portion is slightly inclined in the direction of the optical axis,
- wherein the second portion of the shield is located between the LED light source and the first portion, and
- wherein the second portion of the shield is inclined with respect to the horizontal portion with an angle between 5°-30°.
7 more elements
Lighting device, comprising at least
- an LED light source,
- a concave reflector comprising a reflector axis, said LED light source being arranged to emit light to be reflected by said reflector,
- a shield being arranged in front of said reflector,
- a projection lens being arranged to project light passing said shield, said projection lens comprising an optical axis,
- wherein the reflector axis is inclined relative to the optical axis
- wherein said LED light source is arranged below the optical axis,
- wherein said shield comprises an upper edge to cut off a portion of said light reflected by said reflector,
- wherein the upper edge of the shield is provided with a first portion, which first portion is horizontal in the direction of the optical axis, and a second portion, which second portion is slightly inclined in the direction of the optical axis,
- wherein the second portion of the shield is located between the LED light source and the first portion, and
- wherein said reflector comprises at least a first focus, said LED light source being arranged at said first focus.
7 more elements
Lighting device, comprising at least
- an LED light source,
- a concave reflector comprising a reflector axis, said LED light source being arranged to emit light to be reflected by said reflector,
- a shield being arranged in front of said reflector,
- a projection lens being arranged to project light passing said shield, said projection lens comprising an optical axis,
- wherein the reflector axis is inclined relative to the optical axis
- wherein said LED light source is arranged below the optical axis,
- wherein said shield comprises an upper edge to cut off a portion of said light reflected by said reflector,
- wherein the upper edge of the shield is provided with a first portion, which first portion is horizontal in the direction of the optical axis, and a second portion, which second portion is slightly inclined in the direction of the optical axis,
- wherein the second portion of the shield is located between the LED light source and the first portion, and
- wherein at least a portion of said shield is arranged within a focus of said projection lens.
7 more elements
Lighting device, comprising at least
- an LED light source,
- a concave reflector comprising a reflector axis, said LED light source being arranged to emit light to be reflected by said reflector,
- a shield being arranged in front of said reflector,
- a projection lens being arranged to project light passing said shield, said projection lens comprising an optical axis,
- wherein the reflector axis is inclined relative to the optical axis
- wherein said LED light source is arranged below the optical axis,
- wherein said shield comprises an upper edge to cut off a portion of said light reflected by said reflector,
- wherein the upper edge of the shield is provided with a first portion, which first portion is horizontal in the direction of the optical axis, and a second portion, which second portion is slightly inclined in the direction of the optical axis,
- wherein the second portion of the shield is located between the LED light source and the first portion, and
- wherein said reflector is shaped as a half dome arranged above said LED light source.
7 more elements
Lighting device, comprising at least
- an LED light source,
- a concave reflector comprising a reflector axis, said LED light source being arranged to emit light to be reflected by said reflector,
- a shield being arranged in front of said reflector,
- a projection lens being arranged to project light passing said shield, said projection lens comprising an optical axis,
- wherein the reflector axis is inclined relative to the optical axis
- wherein said LED light source is arranged below the optical axis,
- wherein said shield comprises an upper edge to cut off a portion of said light reflected by said reflector,
- wherein the upper edge of the shield is provided with a first portion, which first portion is horizontal in the direction of the optical axis, and a second portion, which second portion is slightly inclined in the direction of the optical axis,
- wherein the second portion of the shield is located between the LED light source and the first portion, and
- wherein said LED light source is arranged on a flat surface arranged inclined relatively to said optical axis of said projection lens.
7 more elements
Lighting device, comprising at least
- an LED light source,
- a concave reflector comprising a reflector axis, said LED light source being arranged to emit light to be reflected by said reflector,
- a shield being arranged in front of said reflector,
- a projection lens being arranged to project light passing said shield, said projection lens comprising an optical axis,
- wherein the reflector axis is inclined relative to the optical axis
- wherein said LED light source is arranged below the optical axis,
- wherein said shield comprises an upper edge to cut off a portion of said light reflected by said reflector,
- wherein the upper edge of the shield is provided with a first portion, which first portion is horizontal in the direction of the optical axis, and a second portion, which second portion is slightly inclined in the direction of the optical axis,
- wherein the second portion of the shield is located between the LED light source and the first portion, and
- wherein said reflector or said LED light source are mounted on a heat sink body.
7 more elements
Vehicle headlight comprising a lighting device having at least:
- an LED light source,
- a concave reflector comprising a reflector axis, said LED light source being arranged to emit light to be reflected by said reflector,
- a shield being arranged in front of said reflector,
- a projection lens being arranged to project light passing said shield, said projection lens comprising an optical axis,
- wherein the reflector axis is inclined relative to the optical axis
- wherein said LED light source is arranged below the optical axis,
- wherein said shield comprises an upper edge to cut off a portion of said light reflected by said reflector,
- wherein the upper edge of the shield is provided with a first portion, which first portion is horizontal in the direction of the optical axis, and a second portion, which second portion is slightly inclined in the direction of the optical axis, and
- wherein the second portion of the shield is located between the LED light source and the first portion.
6 more elements
Dependencies are inferred from the claim text.