Scanning Led Array Based Volumetric Display

A novel quasi-holographic display concept is developed using light emitting diode (LED) arrays on scanning platform. The display system is capable of providing smooth motion parallax and solving the accommodation-vergence rivalry. Each scanner module contains 1D LED array mounted on a polymer scanner with a lens for imaging the LEDs onto a special diffuser screen. The scanning modules are actuated electromagnetically and the LEDs are driven with an external LED driving field programmable gate array (FPGA) circuitry designed for the purpose. The scanners have a natural frequency of 12.7 Hz, scan line of 21.5deg total optical scan angle (TOSA) and a quality factor of 20. The three dimensional (3D) display concept is proved with two of these modules by displaying two points sequentially at two different depths.