US20250363960
2025-11-27
Physics
G09G3/3413
The patent application introduces a method and apparatus for multi-modal illumination and display systems that enhance color rendering, power efficiency, health, and eye safety. The technology involves electronically controlling the emission spectrum of lighting and displays to optimize for human vision safety, color accuracy, and energy efficiency. The system includes components like light-emitting chips, electronic control devices, and display panels. It can operate in various modes to provide eye-safe color rendering by minimizing harmful wavelengths and adjusting brightness configurations.
Traditional light sources like incandescent bulbs emit a broad spectrum of light with a bias towards red wavelengths, which is perceived as warm light but is inefficient due to energy loss as heat. Modern solid-state lighting technologies such as LEDs offer narrow-band emissions with higher energy efficiency, making them suitable for compact displays and portable devices. However, concerns have arisen about the excessive blue light emitted by LEDs, which can negatively impact health and vision.
Sunlight encompasses a broad spectrum of visible and invisible wavelengths, with blue light being more prominent at midday. As evening approaches, blue light diminishes due to atmospheric scattering, signaling biological changes in living organisms. Human vision compensates for changes in ambient light conditions, allowing us to perceive consistent colors even as lighting conditions vary. Blue-cyan light is crucial for maintaining circadian rhythms and alertness.
The human perception of color is mapped using the Chromaticity Color Diagram, which illustrates how different colors are perceived based on photoreceptor responses in the retina. White light can be described using a color temperature scale in Kelvin, indicating whether it appears warm or cool. Luminous efficiency measures perceived brightness relative to radiant power, with units like lumens and candela used to quantify light intensity and brightness.
LEDs are narrow-spectrum emitters that produce highly saturated light within specific wavebands. Early white LEDs combined blue, green, and red LEDs to create synthetic white light but faced challenges related to cost and differential aging of components. The current invention aims to address these issues by providing a more efficient and eye-safe lighting solution that can dynamically adjust emission spectra for various applications.