"Recommending practices for
modulating current in High Brightness LEDs for mitigating health risks
to viewers"
History:
Officially sanctioned by IEEE (Power
Electronics Standards Association) in October 2008, the process for
forming a working group began 9 months earlier. Working with
standards associations within NEMA and CIE, it was realized that many
LED lamp manufacturers and LED driver manufacturers are concerned with
making sure they are driving LED lamps at safe modulating frequencies.
But, there is confusion as to what these frequencies are for different
LED applications. Standards Chair, Brad Lehman, began to contact
leading experts/researchers in LED lamp design, lighting environmental
psychologists, health experts, LED driver designers and organized the
working group. The group will publish recommended practices in IEEE.
The report will also be submitted to appropriate CIE and NEMA
standards groups, who have representation/liasons in the IEEE working
group as well.
Status:
Draft subcommittee reports are being written
on specific topics that include photosensitive epiliepsy, definitions,
methods for driving LEDs. (7/09)
