P‐145: Blue Light Hazards and Methods of Quantification

Abstract

Blue light emitting from the white light for displays and lighting imposes threat to eyes and physiology. We will present here an action spectrum of melatonin generation suppression and the function of photoretinitis, and the methods of quantifying the blue hazards. Orange light of around 610nm is recommended as the basic lighting component for both applications.

Permissible viewing times of educational projector and TV

“…To explore if some of the threats can be quantified, a few studies were carried out about the effect of wavelength on photoretinitis [ [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] ]. The threat was quantified via the use of a permissible exposure-limit [ [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] ]. For examples, Okuno et al used the permissible exposure-limit to evaluate the blue-light hazard of various light sources [ 24 ].…”

“…It covered the detection of blue-hazard as well as the influences of blue light on eye and circadian rhythms [ 30 ]. Besides the maximum permissible exposure limit (MPE), Jou et al also applied a new index, melatonin suppression sensitivity (MSS), to quantify the threat of light at night on melatonin secretion [ 35 ]. They also applied MPE and MSS to demonstrate a fabricated candlelight-style OLED to be eye- and physiologically-more friendly than the blue enriched counterparts [ [32] , [33] , [34] , [35] , [36] , [37] ].…”

“…Besides the maximum permissible exposure limit (MPE), Jou et al also applied a new index, melatonin suppression sensitivity (MSS), to quantify the threat of light at night on melatonin secretion [ 35 ]. They also applied MPE and MSS to demonstrate a fabricated candlelight-style OLED to be eye- and physiologically-more friendly than the blue enriched counterparts [ [32] , [33] , [34] , [35] , [36] , [37] ]. Furthermore, Jou et al reported an easy-to-apply formula and a ready-to-use table derived therefrom to enable a quick determination of the maximum permissible exposure limit (MPE) of any given desk lamp by knowing its labelled color temperature and luminous flux [ 38 ].…”