A revolutionarynew artificial retinal device developed by the investigators at the International Centre for Materials Nanoarchitectonics is the first of its kind. It increases the edge contrast between lighter and darker areas of an image utilizing ionic migration and interaction within solid.
FREMONT, CA: According to a recent news report presented by the WPI-MANA, the proposed new artificial retinal device has enormous prospects in developing compact, energy-efficient visual sensing and image-processing hardware systems capable of processing analog signals. Lately, artificial intelligence system developers have shown keen interest and fascination in researching various sensors and analog information-processing systems inspired by the human senses. AI systems primarily work on advanced software and complex circuit configurations, including custom-designed processing modules. However, the major problem with these systems is that they are bulky and consume more power.
Based on the information expressed in the center’s report, the team at the International Centre for Materials Nanoarchitechtonics has built a multiple ionic device system.Each device system has a lithium cobalt oxide channel arranged on a common lithium phosphorus oxynitride electrolyte. The devices were highly interactional because of the migration of Li-ions between the channels through the electrolyte, similar to the human retinal neurons, such asthe photoreceptors, horizontal, and bipolar cells.The input voltage pulses cause the ions within the electrolyte to migrate across the channels, changing the output channel current.
The artificial retinal device was able to read input image signals and create an image with increased edge contrast between darker and lighter areas, a significant point noted by the center located in Ibaraki, Japan. They further stated that this development has the ability to increase edge contrast between brightness differences by means of visual lateral inhibition that is similar to the human optical system.
The human eye generates various optical illusions related to tilt angle, size, colour, and movement, alongside processing differences between darkness and lightness.This process is considered to play a key role in the visual identification of different objects as specified by the investigators at WPI-MANA.The center further revealed that the artificial retinal device created by the team could be used to procreate these types of optical illusions. They say that there is a newfound hope to develop visual sensing systems capable of performing, mimicking, human retinal functions by merging their device with other components that also include photoreceptor circuits.