Projecting images at a diagonal angle on a flat or an uneven surface using a smartphone projector tends to produce out of focus projections. To combat the problem, researchers at the Fraunhofer Institute for Applied Optics and Precision Engineering in Germany have developed a new prototype LED projector for smartphones that can produce distortion-free, bright and crisp display at non-perpendicular angles and on onto irregular surfaces. Using the bio-mechanism that compound eyes of insects possess, an array of 200 micro projectors are used in the system that output the identical complete images and superimpose them on the wall or any other surface on top of one another which allows the system to adjust the focus of its image independently via each micro projector.
To provide the necessary data, a camera and the position sensor of the smartphone can be integrated into the system depending on the distance of the projector from the surface. This would allow the array to gauge its own unique distance and custom focus micro projectors to reflect an image perfectly even it is projected on a curved surface.
A grid of infrared lines also overlays the image that allows users to interact with the projected image as well. According to researchers, the system is well-suited to mass-projector since the whole LED projector system measures just 0.79 x 0.79 inches or 2 x 2 centimeters though it could only be available in regular smartphones only a few years from now.