Lighting apparatus with conversion device
A technology for lighting devices and conversion devices, which is applied to lighting devices, fixed lighting devices, components of lighting devices, etc., and can solve problems such as low optical density
Active Publication Date: 2016-10-12
OSRAM GMBH
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, the optical density that can be achieved is relatively small
Method used
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[0041] figure 1 The lighting device 1 according to the first exemplary embodiment is shown in a cross-sectional side view. The lighting device 1 has a primary light source in the form of a laser 2 , which radiates blue primary light P into the guide optics. The guide optics are here designed as light mixing conductors in the form of light mixing rods 3 made of transparent glass or plastic. The first end face 4 of the light mixing rod 3 serves as a light entry face for the primary light rays P. As shown in FIG. The primary light rays P pass through the light mixing rod 3 in their longitudinal direction and are mixed there. On the second end face 5 of the light mixing rod 3 used as the light exit face, a uniform light spot is obtained with respect to its intensity. This light spot is largely independent of the exact position of the primary beam P on the first end face 3 . In order to support a uniform light spot on the second end surface 5, the cross-sectional shape of the ...
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Abstract
The lighting apparatus (1) comprises at least one primary light source (2) for generating primary light (P), a reflector (7-9) having two spaced-apart focal spots (BF1, BF2), a guiding optical unit (3) disposed downstream of the at least one primary light source (2) and serving for guiding the primary light (P) to a first focal spot (BF1) of the reflector (7-9), and a conversion device (10-16) for at least partly converting the primary light (P) into secondary light (S) having a different wavelength which is situated at the second focal spot (BF2), wherein the reflector (7-9) has a first reflective partial region (8), to which the two focal spots (BF1, BF2) are assigned, and a second reflective partial region (9), which is a partial region retroreflective for the second focal spot (BF2), and wherein the primary light (P) emitted by the at least one primary light source (2) is incident on the first partial region (8). The invention is applicable in particular to the field of vehicle lighting systems, in particular exterior lighting, e.g. for generating an additional light, a daytime running light, etc.
Description
technical field [0001] The invention relates to a lighting device having: at least one primary light source for generating primary light; a reflector with two spaced apart focal spots; a guiding optic connected downstream of the at least one primary light source for directing the primary light a first focal spot directed to the reflector; and conversion means for at least partially converting the primary light into secondary light having a different wavelength. The invention can be used in particular in the field of motor vehicle lighting, in particular exterior lighting, for example for generating additional light, daytime running light and the like. Background technique [0002] Illumination devices with light-emitting diodes (“LEDs”) are known which partially convert the blue primary light generated by the LED into yellow light by means of wavelength-converting phosphors and generate blue-yellow or white mixed light. The white mixed light can be used, for example, to gen...
Claims
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IPC IPC(8): F21S8/10
CPCF21S41/16F21S41/24F21S41/36F21S41/365F21S41/176F21S41/331F21V7/0025F21V7/0033F21Y2115/10F21Y2115/30G02B1/11G02B6/0008
Inventor 斯特凡·哈德拉斯
Owner OSRAM GMBH