RID, light source aspects - first considerations - SLR-28-09 RID, light source aspects - first considerations - W. Schlager 21-02-2019

“Timing” requirements linked to gas-discharges RID, AFS, 5.3.1.4.4.: “4 seconds after cold ignition” Not-integrated ballast >=37500cd in HV of driving beam >=3100cd in 50V of passing beam (… and FF, 5.5.3.1.) >=1080cd in 2°D-V of fog lamp RID, passing beam “class D”, 5.2.2.: “Passing-beam headlamps with gas-discharge light sources shall meet these luminous intensities only after more than 10 minutes after ignition.” R99, under run-up, 3.6.2.: min. flux after 1s and after 4s R99, under hot-restrike, 3.6.3.: min. flux after 1s ERROR: 4s-requirement from R98 is missing here!

“Timing” requirements linked to LEDs RID, cornering lamps, 5.6.3.3.: after 1 min and after 10 min RID, all lamps with LEDs, Annex 9, 4.3.: after 1 min and photometric stability LSD, reversing and maneuvering lamps, 4.8.2.3.1.: after 1 min and after 10 min LSD, all other lamps, 4.8.2.3.2.: after 1 min and after 30 min LSD, sequential activation of indicators, 5.6.11.: <= 200 ms (all kind of light sources) R128, different aspects: after 1 min and after 30 min

In a nutshell Gas-discharges LEDs Filaments A minimum intensity or flux is required after several seconds Beam pattern compliance (min. and max.) is required after several minutes LEDs Beam pattern compliance (min. and max.) is required after 1min, 10min, 30min and/or at photometric stability No variation of sequentially activated indicators after 200ms (not limited to LEDs) Filaments No explicit testing requirements with respect to time

“Conclusions” Gas-discharge technology  fear of “insufficient light at start-up” LED technology  fear of “too much light at start-up and/or critical drop after longer time” Filament technology  always taken “as a given” Compared to gas-discharges considered as fast run-up Compared to LEDs considered as stable over time BUT: for “immediate” signals (e.g. stop) LEDs might outperform filaments BUT: for “high usage” lamps (e.g. low-beam) LEDs might have better luminous flux maintenance

“Ideas” for RID/LSD stage 2 approach – with respect to light sources Technology-neutral requirements, e.g. Allow in general all light source technologies (approved LS, modules, non-replaceables) Allow mixing, but limit differences in CCT within one function Lamp/function-dependent timing requirements, e.g. [Require min. intensity after “milliseconds” for time critical signals (stop, direction)] Require min. intensity after “seconds” for time critical illumination (low-beam, high beam) Require min. and max. intensity after “minutes” for all functions Only testing stays technology-specific, e.g. In case of gas-discharge technology mandatory check of min. value after “seconds” In case of LED technology mandatory check at 1min and after several minutes For all technologies mandatory check after photometric stabilization