| Keywords |
Human centric lighting; Melatonin regulation; Light source; Lighting device; Patent analysis |
| Abstract |
This study analyzes patent trends in melatonin regulation technologies within the broader development of human centric lighting. A total of 283 patents were identified and categorized into light source technologies and lighting device technologies, and further grouped into four functional areas: melatonin suppression, reduction, promotion, and control. Patent activity has increased steadily since the mid 2010s, peaking between 2019 and 2021. China, the United States, and Japan accounted for more than 80 percent of all filings. China showed rapid growth in light source and control technologies, while the United States and Japan focused on application oriented lighting device innovations. Recent developments show a transition from basic melatonin suppression toward more precise and dynamic regulation of human circadian rhythms. Major companies such as Panasonic, Nichia, and Philips have advanced wavelength conversion materials, multi phosphor spectral designs, and adaptive radiation control to improve melatonin regulation. Application fields include driving safety, productivity enhancement, sleep and healthcare support, and personalized circadian lighting. Overall, melatonin regulation is emerging as a core component of human centric lighting, indicating the need for future personalized lighting systems using real time biological signals from sensors and wearable devices. |