Flicker Modeling of White Light Emitting Diode With Sinusoidal Waveform

Chen, Huan-Ting; Zhang, Wenjie; Lin, Shou-De; Shen, Xuehua; Chen, Cihai; Qinyu, Gan; Hexun, Lin

doi:10.1109/ted.2022.3215930

Cited by 2 publications

(1 citation statement)

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“…Though the luminous flux is generally dependent on junction temperature and current intensity. However, if the thermal design of LED system is suitable enough (such as, an excellent heatsink with a small thermal resistance or a temperature-controlled heatsink is adopted to ensure good thermal conduction), the impact of junction temperature will be slight and thus can be neglected [27]. On this occasion, coefficients in (12), i.e., β R1 , β R2 , β G1 , and β G2 can be treated as constants.…”

Section: Tunable Dimming Models Of Described Led Systemsmentioning

confidence: 99%

Analysis and Tunable Models for Phosphor-Converted White Light-Emitting Diode Based on Spectral Compensation

et al. 2023

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The correlated color temperature (CCT) and color rendering index (CRI) are two significant indicators related to the color appearance and visual effects of illumination. This paper concentrates on dynamic dimming for phosphor-converted (PC) white LEDs to achieve tunable CCT and adequate CRI, via compensation of red/green spectra. The LED systems described have a simple configuration consisting of a PC white LED, a monochrome green LED and a monochrome red LED, which can be individually driven. Compared to individual PC white LEDs, both the spectral continuity and uniformity of the mixed white light are enhanced. The tunable dimming models are proposed by combination of spectral colorimetry and photo-electro-thermal (PET) theory, thus multi-physics effects are involved. From the modeling process and results, the nonlinear characteristics are observed. Experimental verifications present good agreement existing between calculations and measurements, both in terms of values and variation trends. These proposed models could be effective tools to figure out photometric characteristics and visual perception of illumination. On the other hand, they could provide schemes of reference to improve the illumination environment adapting to various special occasions and personal preferences.

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Section: Tunable Dimming Models Of Described Led Systemsmentioning

confidence: 99%