Comparison of Properties of White LED and Blue LED with External Phosphor Layer

Vitasek, Jan; Stratil, Tomas; Wilcek, Zdenek; Kolář, Jakub; Hub, Michal

doi:10.1109/icton.2019.8840376

Cited by 2 publications

(2 citation statements)

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“…It also concluded that rise time and fall time of blue LED with an external phosphorous layer and are shorter than white LED. an amplitude ratio (Amp1MHz/Amp4MHz) is shorter / smaller for the blue LED with the external phosphor layer than for the white LED5500K [7].…”

Section: Introductionmentioning

confidence: 94%

“…For CCT 5700 K initial average photocurrent is maximum due to its higher transmit power but afterwards at higher range both the CCTs 2200 K and 3000 K due to higher responsivity of the detector for red and yellowish green wavelength have displayed more average photocurrent. - Colum (4,5,6) for fixed data rate of 180 Mbps and distance varied from 1 m to 5 m Colum (7,8,9) for fixed distance of 5 m and data rate varied from 100 to 500 Mbps Colum (10,11,12) for fixed distance of 5m and data rate varied from 130 to 170 Mbps…”

Section: Detector S5107mentioning

confidence: 99%

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Analysis of effects of Correlated Color Temperature (CCT) on the performance of Visible Light Communication (VLC) Link.

Paliwal,

Patel,

Atieh

2024

Preprint

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CA system model for the Line-of-Sight (LoS) Lambertian radiation pattern has been designed with commercially used high power white phosphorous converted white light emitting diode (PLED) of CCTs 2200K, 3000K and 5700 K and three photodiodes of quite different specifications. This system has been successfully tested for the maximum data rate of 300 Mbps and 170 Mbps for RC constant and electron life time 0.5 ns and 1 ns, respectively. The CCTs 2200k and 3000k irrespective of any particular detector have provided maximum data rates. One CCT 5700K with detector model of S5107 or S7686 for the values 0.5 ns and 1 ns has provided slight lower data rate of 200 Mbps or 150 Mbps, respectively with required BER of 10-6 for stable communication. This CCT 5700 K performance with another detector S5973/-01 has been noticed altogether different and could not sustained the VLC link and signals were not detected by the detector. It is thus concluded that both the CCTs 2200K and 3000K have performed satisfactorily with all the three detectors but one CCT 5700K with combination of detector S5973/-01 found completely mismatched as this could not even establish the link. This CCT 5700 K despite of having higher brightness and transmit power due to lower responsivity of the detector as compared with the other two CCTs supported slight lower data rates. All the three detectors have varied responsivity and other specifications which have affected performance of VLC link. For CCT 5700 K both the detectors, S5107 and S7686 have almost equal responsivity support but the detector S5973/-01 provided slight lesser as compared to other detectors. This exhibited that all the three detectors have varied performance for CCT 5700 K due to dominating in blue wavelength beside other limitations of responsivity and photo sensing area of the detectors.

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Section: Introductionmentioning

confidence: 94%