| Technology Profile
21-24 APR 2020 AMSTERDAM
SEEWOR Stand: 11.111
90Hz. When the light sources
of a test module are operating
in a pulse mode, no light flicker
is visible. This guarantees the
optical performance and
compliance with EN12966
standard.
standard and meet a better
optical performance.
Magnified observations
In terms of beam width, Seewor
has achieved B6 class by
developing an optical lens to
magnify the optical output
while restricting the light in a
required coverage area. In this
way, the optical performance
can be concentrated to reduce
stray light. When VMS is
installed in urban dense road
environments, VMS can only be
be so harmful to the life cycle
of the VMS.
The value of luminance ratio
(contrast) determines readability
and legibility of the product.
Seewor VMS has achieved the
highest level R3 and balanced
different required optical
performances by testing
different materials on the
mask of the test-module.
Seewor VMS adopt static
driving modes in the selected
IC and PCB design. This ensures
the frequency is higher than
Left: Gantry mounted
VMS in Pakistan
Below: Post mounted
VMS in China
seen from a specific angle,
which greatly reduces
unnecessary impacts to the
surrounding buildings, lighting,
or to unrelated side roads.
The lens design allows the
LED to reach a required
brightness (L3 in a low
operating led current), so as to
achieve a relatively low power
consumption. Compared to
other VMS, Seewor’s product
doesn’t need to increase the
LED current to meet the
required brightness, that can
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January/February 2020 Traffic Technology International 071
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