Work

Spectral optimization of healthy laser-based displays applied for people of different age groups

Year: 2026

Type: article

Abstract: With the discovery of intrinsically photosensitive retinal ganglion cells (ipRGCs), the circadian effect of lighting has drawn great attention from the community. The optimization of spectral power distribution (SPD) in laser-based displays (LBDs) has gained substantial interest. In this paper, we propose a comprehensive spectral optimization method for both three-primary and four-primary LBDs, tailored for users across different age groups (1–100 years old). By employing a Gaussian spectral model and genetic algorithm (GA) optimization under constraints such as color gamut coverage (Rec. 2020) and correlated color temperature (CCT), we identify optimal SPDs that minimize or maximize melanopic efficacy of luminous radiation (MELR). The results reveal that the MELR decreases with age and increases with CCT, and that four-primary LBDs offer higher circadian tunability than three-primary LBDs. These findings establish a framework for the design of age-adaptive healthy display technologies that balance circadian impact, visual performance, and photobiological safety.

Source: Results in Engineering

DOI: 10.1016/j.rineng.2026.110238

Authors: Yanfei Chen, Jiehao Huang, Xinyuan Liu, Zhong Chen, Ziquan Guo

Institution: Xiamen University

Language: English

Topic: Color Science and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $1,940