Abstract:
This document includes a definition of the concept of modulation frequencies for light-emitting diodes (LEDs), a discussion on their applications to LED lighting, a descr...Show MoreScope:The scope of this recommended practices document is to Define the concept of modulation frequencies for light-emitting diodes (LEDs) and discuss their applications to L...Show More
Purpose:Presently, there are no standards on safe modulating frequencies for high-brightness LEDs. Vendors suggest various driving frequenciessome at low frequencies and others a...Show More
Metadata
Abstract:
This document includes a definition of the concept of modulation frequencies for light-emitting diodes (LEDs), a discussion on their applications to LED lighting, a description of LED lighting applications in which modulation frequencies pose possible health risks to users, a discussion of the dimming of LEDs by modulating the frequency of driving currents/voltage, and recommendations for modulation frequencies (flicker) for LED lighting and dimming applications to help protect against known potential adverse health effects.
Scope:
The scope of this recommended practices document is to Define the concept of modulation frequencies for light-emitting diodes (LEDs) and discuss their applications to LED lighting.- Describe LED lighting applications in which modulation frequencies pose possible health risks to users.- Discuss the dimming of LEDs by modulating the frequency of driving currents/voltage.- Present recommendations for modulation frequencies (flicker) for LED lighting and dimming applications to help protect against known potential adverse health effects.
Purpose:
Presently, there are no standards on safe modulating frequencies for high-brightness LEDs. Vendors suggest various driving frequenciessome at low frequencies and others at high frequencies. In the late 1980s and early 1990s, studies showed that office fluorescent lighting with magnetic ballasts modulating at twice the ac line frequency increased the incidence of health-related problems, such as headaches, eyestrain, and, when the lamps were in failure, epileptic seizures. The detrimental effects depend on factors such as brightness, angle of viewing, wavelength, and depth of modulation, among others. The purpose of this document is to describe some possible ...
Date of Publication: 05 June 2015
Electronic ISBN:978-0-7381-9644-2
ICS Code: 13.180 - Ergonomics
Persistent Link: https://ieeexplore.ieee.org/servlet/opac?punumber=7118616