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EP-4399444-B1 - VEHICLE LIGHT AND VEHICLE COMPRISING THE VEHICLE LIGHT

EP4399444B1EP 4399444 B1EP4399444 B1EP 4399444B1EP-4399444-B1

Inventors

  • GROSS, MARTIN
  • LANGKABEL, FRANK
  • HABERKORN, ROUVEN
  • NDJEUNDOUN, Paul

Dates

Publication Date
20260506
Application Date
20211026

Claims (9)

  1. Vehicle light comprising a first light source (12), a second light source (14), at least one optical element (16) comprising a light exit surface (18), a first collimator surface (20) and a second collimator surface (22), wherein the first light source (12) is arranged on the first collimator surface (20) such that the first light source (12) emits first light rays through the first collimator surface (20), wherein a first optical path (24) of the first light rays extends from the first collimator surface (20) through the light exit surface (18), wherein the second light source (14) is arranged on the second collimator surface (22) such that the second light source (14) emits second light rays through the second collimator surface (22), characterized in that a second optical path (26) of the second light rays extends from the second collimator surface (22) through the light exit surface (18), wherein the second optical path (26) overlaps with the first optical path (24) at the light exit surface (18) and wherein, at the light exit surface (18), the second light rays have a different color than the first light rays; characterized in that the at least one optical element (16) further comprises at least one colored portion (34) being arranged in the second optical path (26) between the light exit surface (18) and the second collimator surface (22), and is configured to change the color of collimated light of the second light source (14); and the at least one colored portion (34) comprises the second collimator surface (22), so that the light radiating from the second light source (14) through the collimator surface (22) immediately enter the colored portion (34).
  2. Vehicle light according to claim 1, characterized in that the at least one optical element (16) comprises a double reflective element being arranged in the second optical path (26).
  3. Vehicle light according to claim 2, characterized in that the double reflective element comprises two reflective surfaces (30, 32) in a periscope arrangement.
  4. Vehicle light according to one of claims 1 to 3, characterized in that the first light source (12) is configured to emit white light, wherein the first light source (12) preferably is a white light emitting diode.
  5. Vehicle light according to one of claims 1 to 4, characterized in that the second light source (14) is configured to emit monochromatic light, wherein the second light source (14) preferably is a monochromatic light emitting diode.
  6. Vehicle light according to one of claims 1 to 4, characterized in that the second light source (14) is configured to emit white light, wherein the second light source (14) preferably is a white light emitting diode.
  7. Vehicle light according to one of claims 1 to 6, characterized in that the at least one colored portion (34) is a separate part being attached to the at least one optical element (16).
  8. Vehicle light according to one of claims 1 to 6, characterized in that the at least one colored portion (34) is an inseparable part of to the at least one optical element (16).
  9. Vehicle comprising at least one vehicle light (10) according to one of claims 1 to 8, a front end (42) and a rear end (44) wherein at least one vehicle light (10) is attached to the front end (42) and/or the rear end (44).

Description

The invention relates to vehicle light and a vehicle comprising that vehicle light. Vehicles comprise light elements for lightening up darkness, to increase visibility and/or for communicating with further road users. For increasing visibility, for example, the vehicles may comprise daytime running lights. For communicating with further road users, the vehicles may comprise turn lights and/or stop lights. From DE 10 2014205606 A1, it is known to provide a lamp with multiple laser diodes. The laser diodes couple in light into a light entrance surface of a light mixing rod. Mixed light exits the light mixing rod. That light is led into an optical element, which guides a portion of the light to a wavelength conversion device, which changes the color of the portion of the light. Thus, the lamp emits light rays with different colors. FR 2 918 439 A1 discloses a light signaling device for a motor vehicle comprising at least a first light source and a second rear light source which are capable of being activated alternatively and each of which is capable of forming a longitudinal light signaling beam. EP 3 572 723 A1 relates to a lighting tool for a vehicle with a first light source and a second light source. From US 2012/057362 A1, a device for optional coupling of light into at least one light conductor in an illuminating element is known. FR 2 966 223 A1 discloses a device with two light sources such as LEDs, wherein each LED is associated with an optical device. WO 2021/136235 A1 relates to a light guide component, a lighting apparatus and a vehicle. DE 28 20 113 A1 discloses a headlight-lamp unit with a diffuser body made of soft glasses. From EP 0 768 491 A1, a multilayered lens for a lamp is known. US 2008/278962 A1 discloses a light system for a vehicle headlight unit, the system comprising a light source (11),a lamp reflector (12) and a substantially rod-shaped transparent light guide (2), wherein the reflector (12) projects light from the light source (11) into the light guide (2), the light guide comprises a glass guide part (21)and a plastic guide part (22), and the glass guide part (21) extends between the light source (11)and the plastic part (22). KR 101295825 B1 discloses a car color light guide application lamp using the light source tinged with the chromatics or irradiates with the mixing of the chromatics of light in the desired color by using the light guide etc. including the chromatics layer. The car color light guide application lamp comprises the light source irradiating the light of the first chromatics, and the light guide in which a part has the second chromatics. And the third color herbs generated by the mixing of the second chromatics and the first chromatics the light of the first chromatics passes through the light guide. EP 2047307 A1 relates to an optical fiber system having a first optical fiber (LL1 ) and a second optical fiber (LL2), wherein the second optical fiber (LL2) is disposed downstream to the first optical fiber (LL1 ) in the light propagation direction, wherein the first optical fiber (LL1 ) is more temperature tolerant than the second optical fiber (LL2), and wherein the first optical fiber (LL1 ) and the second optical fiber (LL2) have at least one mutual absorption line in the infrared spectral region. CN 112240536 A provides a light source device, a light guide and a method of manufacturing the light guide. The light guide includes a transparent tube (100) and a light guide medium (200) disposed within the transparent tube, the light guide medium including an adhesive material (210) and fluorescent powder (220), a distance between the adhesive material and the transparent tube being less than 780 nm. According to the invention, the bonding material and the transparent tube with similar refractive indexes are selected, and then the slurry containing the fluorescent powder and the bonding material is cured in the smooth transparent tube, so that the transparent tube can provide a smooth surface after the auxiliary light guide medium is formed, and the outer wall of the transparent tube isused as the side surface of the light guide. The surface of the light guide medium does not need to be polished, so that the preparation process of the light guide is simplified. The technical object may be providing an improved vehicle light having a simple configuration and which provides an increased flexibility in light colors. The invention is set out in the appended set of claims. In an aspect of the invention, a vehicle light comprising a first light source, a second light source, at least one optical element comprising a light exit surface, a first collimator surface and a second collimator surface, wherein the first light source is arranged on the first collimator surface such that the first light source emits first light rays through the first collimator surface, wherein a first optical path of the first light rays extends from the first collimator surface through the ligh