Light from - and for - the future: BMW pixel light



The revolutionary pixel headlights provides a brand-new standard of
ultra-precise light distribution. "We see pixel headlights as the third
stage of BMW's lights technology following the bi-xenon module and
Adaptive
Headlights. This is not only an intelligent, but also a free
programmable
headlights technology", states Dr Martin Enders, BMW Group Director of
Lights Technology.



The basic principle of the pixel headlights is the same as in a regular
video projector: Contrary to conventional headlights where a large
element
bundles the incoming light and focuses it in the desired direction,
pixel
headlights are based on DMD (Digital Micro mirror Device) technology.



A DMD chip incorporates 480,000 minute micro mirrors taking over the
function of a conventional reflector. Light from the beam is diverted
by
these micro mirrors and transmitted to the road ahead. Each
micro-reflector
representing one pixel can be controlled and moved individually by
means of
computer circuits. This provides brand-new, unprecedented functions
such as
anti-dazzle permanent high-beam illumination, with the beam being
cancelled
out in the area around the eye and vision lines of a motorist coming
the
other way. Further advantages are the particularly bright illumination
of
road markings and the projection of navigation as well as warning
messages
straight on to the road ahead.



In the first phase of development, pixel headlights will be used as an
additional element supplementing conventional light systems. In this
case
the standard front headlights will ensure the necessary illumination of
contours to the side, whilst the pixel lights beam will serve at a
spotlight
illuminating specific areas more brightly whenever required.



Then, going beyond this interim step, pixel lights will be used
subsequently
to provide all the illumination required at the front - offering a wide
range of applications for a significant improvement of both motoring
comfort
and road safety.