Patent ID: 9182605
Filing Date: 2015-11-10
Classification: G02B,G03B,H04N

Abstract:
1. A front-projection autostereoscopic three-dimensional (3D) display system for forming a plurality of perspective views of 3D images of an object or scene in a field of view, comprising: a display component for generating a sequence of 2-dimensional (2D) images, the display component having a display surface for displaying 2D images, a data input for updating 2D images, and a synchronization input; an optical scanning assembly for transforming optical beams emanating from each 2D image on the displaying surface and sending transformed optical beams in the direction of the corresponding perspective view in the field of view, the optical scanning assembly including: a first lens array, an optical beam shifting device, an optical projection block, and a reflection screen including a second converging lens array and a mirror (reflector), wherein the first lens array, the optical projection block and the reflection screen being stationary with respect to each other and to the display component, and wherein each lens of the first lens array being optically coupled to one respective area of the display surface along a respective optical axis, and each lens of the second lens array being optically coupled to one respective lens of the first lens array through the optical projection block and the optical beam shifting device, whereas the mirror and the second lens array being disposed from each other at or close to a distance of half of the focal length of lenses of the second lens array; the optical beam shifting device including: an optical component for shifting optical beams passing therethrough and a driver having a control input; the optical projection block being configured for focusing each optical beam on one respective lens of the second lens array and sending the optical beam reflected from the mirror further through the same lens of the second lens array in the direction of the respective perspective view; a sensor configured for sensing the position of shifted optical beams, the sensor having a synchrosignal output; and a controller configured for controlling scanning parameters and synchronisation of 2D images displayed on the display surface with the position of shifted optical beams, the controller having a synchrosignal input being connected to the synchrosignal output of the sensor, a synchronization output being connected to the synchronization input of the display component, and a control output being connected to the control input of the driver of the optical beam shifting device.