Phantom array and stroboscopic effect visibility under combinations of TLM parameters

Abstract

Solid-state light sources can be more prone to larger temporal light modulation (TLM) than conventional sources. TLM visibility depends on wave shape, frequency, modulation depth and duty cycle, and is affected by the sensitivity of the observer. TLM can be visible well above the critical flicker fusion frequency, when there is relative movement between the observer’s eyes and light source, lighted space or moving objects in the field of view. This human subjects experiment explored visibility of the stroboscopic effect (SE) versus the phantom array effect (PAE) with targeted tasks under 74 TLM waveforms. The results showed the SE visibility peaks between 90 Hz and 120 Hz, while the PAE visibility peaks between 500 Hz and 1000 Hz. The phantom array is visible to sensitive participants at 6000 Hz. Both effects are more visible under rectangular versus sinusoidal TLM, higher modulation, and when duty cycles are 10% or 30% versus 50%. Higher sensitivity participants, differentiated using the Leiden Visual Sensitivity Scale, rated TLM waveforms as more visible, especially those inherently harder to see. This work lays a foundation for a PAE metric and guides driver and dimmer designers toward electronic circuits that minimize the visibility of TLM in LED products.

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References

IEEE. IEEE Recommended Practices for Modulating Current in High-Brightness LEDs for Mitigating Health Risks to Viewers. IEEE 1789-2015. New York, NY: IEEE Power Electronics Society, 2015.

Wilkins

Nimmo-Smith

Slater

Bedocs

. Fluorescent lighting, headaches and eye-strain. Lighting Research and Technology 1989; 21: 11–18.

Bullough

Sweater Hickcox

Klein

Narendran

. Effects of flicker characteristics from solid-state lighting on detection, acceptability and comfort. Lighting Research and Technology 2011; 43: 337–348.

Bullough

Sweater Hickcox

Klein

Lok

Narendran

. Detection and acceptability of stroboscopic effects from flicker. Lighting Research and Technology 2012; 44: 477–483.

Bullough

Skinner

Sweater Hickox

. Visual performance and perceived lighting quality under flickering illumination. LL20, Proceedings of the 13th International Symposium on the Science and Technology of Lighting, Troy, NY, USA, 2012.

Vogels

Sekulovski

Perz

. Visible artefacts of LEDs. Proceedings of 27th Session of CIE South Africa, Sun City, South Africa, 9–16 July 2011: 46–51.

Perz

Sekulovski

Vogels

Heynderickx

. Stroboscopic effect: contrast threshold function and dependence on illumination level. Journal of the Optical Society of America A 2018; 35: 309–319.

Brown

Foulsham

Lee

Chan-Su

Wilkins

. Research Note: Visibility of temporal light artefact from flicker at 11 kHz. Lighting Research and Technology 2020; 52: 371–376.

Wang

Cheng

Perz

Sekulovski

. The visibility of the phantom array effect under office lighting condition. Proceedings of the CIE Session, Washington, DC, USA, 2019: 17–21.

10.

Park

Lee

C-S

Kang

Pak

Wilkins

. Visibility of the phantom array effect according to luminance, chromaticity and geometry. Lighting Research and Technology 2020; 52: 377–388.

11.

Porter

. Contributions to the study of flicker. Paper II. Proceedings of the Royal Society of London 1902; 431: 63.

12.

De Lange

. Research into the dynamic nature of the human fovea systems with intermittent and modulated light. I. Attenuation characteristic with white and colored light. Journal of the Optical Society of America 1958; 48: 777–784.

13.

Hanson

Short

Flood

Cherup

Miller

. Cortical neural arousal is differentially affected by type of physical exercise performed. Experimental Brain Research 2018; 236: 1643–1649.

14.

Poplawski

Miller

. Flicker in solid-state lighting: measurement techniques, and proposed reporting and application criteria. Proceedings of CIE Centenary Conference “Towards a New Century of Light”, Paris, France, 15–16 April 2013: 188–202.

15.

Perz

Vogels

IMLC

Sekulovski

Wang

Heynderickx

IEJ

. Modeling the visibility of the stroboscopic effect occurring in temporally modulated light systems. Lighting Research and Technology 2015; 47: 281–300.

16.

Hershberger

Jordon

. The phantom array: a perisaccadic illusion of visual direction. The Psychological Record 1998; 48: 21–32.

17.

Roberts

Wilkins

. Flicker can be perceived during saccades at frequencies in excess of 1 kHz. Lighting Research and Technology 2012; 45: 124–132.

18.

Wang

Perz

Sekulovski

. Influence of frequency, waveform and colour on the visibility of the phantom array effect. CIE Conference Proceedings, Taipei, 26–27 April 2018: 138–146.

19.

Miller

Leon

Tan

Irvin

. Flicker: a review of temporal light modulation stimulus, responses, and measures. Lighting Research and Technology 2023; 55: 5–35.

20.

Commission Internationale de l’Eclairage. Visual Aspects of Time-Modulated Lighting Systems. CIE 249-2022. Vienna: CIE, 2022.

21.

Perenboom

MJL

Zamanipoor Najafabadi

Zielman

Carpay

Ferrari

. Quantifying visual allodynia across migraine subtypes: the Leiden Visual Sensitivity Scale. Pain 2018; 159: 2375–2382.

22.

Baloh

Sills

Kumley

Honrubia

. Quantitative measurement of saccade amplitude, duration, and velocity. Neurology 1975; 25: 1065–1070.

23.

Campbell

Robson

. Application of Fourier analysis to the visibility of gratings. Journal of Physiology 1968: 197; 551–566.

24.

Lehman

Wilkins

Berman

Poplawski

Johnson Miller

. Proposing measures of flicker in the low frequencies for lighting applications. IEEE Energy Conversion Congress and Exposition, Phoenix, AZ, USA, 2011: 2865–2872.

25.

Levinson

. Fusion of complex flicker II. Science 1960; 131: 1438–1440.

26.

Kelly

. Visual response to time-dependent stimuli. I. Amplitude sensitivity measurements. Journal of the Optical Society of America 1961; 51: 422–429.

27.

Wilkins

. Visual Stress. Oxford: Oxford University Press, 1995.

28.

Veitch

Martinsons

. Correspondence: On the state of knowledge concerning the effects of temporal light modulation. Lighting Research and Technology 2021; 53: 89–92.

29.

Commission Internationale de l’Éclairage. Guidance on the Measurement of Temporal Light Modulation of Light Sources and Lighting Systems. TN 012:2021. Vienna: CIE, 2021.

30.

Illuminating Engineering Society. Lighting Science: Vision – Perceptions and Performance. ANSI/IES LS-8-20. New York, NY: Illuminating Engineering Society, 2020.

31.

Commission Internationale de l’Éclairage. Visual Aspects of Time-Modulated Lighting Systems – Definitions and Measurement Models. TN 006:2016. Vienna: CIE, 2016.

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