Patent ID: 7726854

Claim:
A device for a motor vehicle, comprising at least one light source emitting a light beam and at least one optical guide in which said light beam propagates, said at least one optical guide comprising: a first face forming an exit face for said light beam to exit the device outside said motor vehicle, and a second face, opposite to said exit face, forming a reflection face for said light beam, wherein said at least one optical guide is associated with a diffusing screen disposed relative to said reflection face of said at least one optical guide, so that when viewed relative to a direction or path of a light beam diffused by said diffusing screen, said diffusing screen is encountered first, followed by said reflection face and then said exit face; wherein a portion of said light beam is reflected by said reflection face toward said exit face and another portion of said light beam escapes said at least one optical guide through said reflection face and encounters said diffusing screen, which directs it back through said reflection face and toward said exit face.