A group of scientists has created novel color sensors with a unique microlens arrangement. The sensors, which can be formed directly on a chip, combine multiple functions in a small space. The sensors’ ultra-slim design makes them suitable for various applications, including mobile devices and color-adjustable LED lamps.
Such color sensors could help to generate true colors in displays, LEDs, and other devices. Their creation necessitates the use of specialized nanoplasmonic structures. These structures filter the incident light, allowing only specific regions of the color spectrum to reach the detector surface.
Controlling the angle of incidence is critical to properly operating the color filters. Traditional sensors include macroscopic elements to improve filter accuracy and avoid false colors by masking the light from undesirable angles. Still, these extra elements significantly increase the component’s build size.
Researchers are working on an all-in-one solution that combines multiple functions in a small space to address this shortcoming. The color sensor chip incorporates color-filter structures, angular filters to regulate incident light, evaluation circuits for signal processing, and photodiodes to convert light energy into electrical energy. In addition to their large scale of integration, which allows a maximum number of functions to be packed onto a small surface, the new sensors are simpler and thus less expensive to manufacture than their predecessors.