A dimmable LED light source along the Planckian locus
Year: 2024
Type: article
Abstract: ) values <0, lower brightness, luminous efficacy, and color rendering index (CRI), lower power density, exceeding the standard deviation of color matching (SDCM), unconstant power, poor color consistencies, and high costs persist. We present a three-channel LED light source featuring an integrated chip-on-board (COB) package structure. The channels are separated by a white dam to reduce reabsorption problems and improve color consistencies between different color temperatures. Additionally, the complementary channel M uses layered phosphor excitation for more accurate and efficient spectral compensation during dimming. Ultimately, this solution enables dimming along the Planck curve with constant power, improving CRI, luminous efficacy, and brightness at intermediate temperatures, while being cost-effective and minimizing the impact on initial color temperatures, offering a high-quality dimmable LED option for intelligent applications.
Source: iScience
Authors: Yuanbao Du, Lixia Zhao, Riguang Zhang, Yaohua Zhang
Institution: Tiangong University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,150
OpenAlex ID: W4405650906