VS - Lighting Systems - Lighting - 998542

13. High and low beams optical systems

13.6. Xenon Bi-function technology

The shutter has two functions: l Creates the cut-off in low beam by masking part of the lamp luminous flux. l Releases the cut-off mask to switch to high beam.

Xenon Bi-function systems can produce both low and high beams with a single Xenon lamp. This makes road illuminance rendering (colour) a key advantage of this technology.

Xenon Bi-function can be designed with both reflector-type and elliptical-type lamps.

The actuation is performed either by a solenoid actuator or by an electro-mechanical system.

13.6.1. Xenon Bi-function with elliptic projector In Xenon Bi-function elliptic projectors, the shield is not fixed. It becomes a shutter that switches over from low to high beam and vice versa.

Xenon Bi-function shutter mechanism

Mobile shield for the cut-off

Low beam in Xenon Bi-function elliptical module

Reflector (elliptical)

Lens

Light bulb

Shield to build up the low beam

Elliptic reflectors can build high and low beams with a unique lamp.

Headlamp for Ford - C-Max with D3S lamp and Xenon Bi-function ellipical technology

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