Self Powering Camera Developed by Columbia University Scientists
Tired of your cameras and mobile phones running out of battery because you took too many pictures with it?
Well how about a camera that would actually get charged using the image that you take? Apparently, a group of researchers at the Columbia University have developed a self powering camera that uses the photodiode of the pixels too turn the light that comes in while taking a picture into energy.
We have designed a simple pixel circuit, where the pixel’s photodiode can be used to not only measure the incident light level, but also to convert the incident light into electrical energy. A sensor architecture is developed where, during each image capture cycle, the pixels are used first to record and read out the image and then used to harvest energy and charge the sensor’s power supply. We have conducted several experiments using off-the-shelf discrete components to validate the practical feasibility of our approach
All the experimentation started with one single pixel that was used physically to scan the images and then a camera producing 30×40 images was developed.
Now they have achieved where they can generate enough energy to power “a scene that is around 300 lux in brightness.” For such an image, they say that “the voltage across the supercap remains well above the minimum needed for the camera to indefinitely produce an image per second.”
Obviously, the self powering camera is at the very initial stages right now, but seeing that it is working for a 30×40 picture, I am sure they are on the right path and would soon be able to turn in something that is usable in real life.