Patent ID: 8325401
Filing Date: 2012-12-04
Classification: G03H

Abstract:
1. Method for the real-time generation of video holograms for a holographic display device with at least one light modulator means on which a scene is to be encoded as an entire hologram and is to be seen as a reconstruction from a visibility region which lies within one periodicity interval of the reconstruction of the video hologram, with a 3D rendering graphics pipeline which structures the scene into object points, where the scene is represented by image data with depth information, and which thereafter determines and provides at least colour and depth information for the object points, where a single object point of the scene is generated by one sub-hologram which is to be encoded on a limited sub-region of the light modulator means, and where the entire hologram is formed by way of a superposition of sub-holograms, and with a holographic pipeline for the generation of the complex hologram values of the object points, whereby the holographic pipeline immediately determines complex hologram values for each object point which is visible from the actual observer position as soon as for that object point depth information and colour information are provided for the first time or currently updated in that (A) the sub-hologram SHN and a corresponding differential sub-hologram SD which correspond to that visible object point are determined, whereby the differential sub-hologram SD with SD=SHN−SHX is defined to be the difference of the corresponding sub-hologram SHN of the visible object point and the sub-hologram SHX of an object point which is now obsolete, i.e. no longer visible, (B) the differential sub-hologram SD is added to the entire hologram, and (C) the information link of the object point and of the sub-hologram SHN of this object point is made available in at least one sub-hologram memory.