Abstract: The invention relates to a method and device for tracking the sweet spots of a sweets spot unit for a transmissive electronic display. The aim of the invention is to improve the reproduction quality and the uniformity of illumination in displays of this type. The display contains a sweet spot unit consisting of an illumination matrix (1) and reproduction elements, in addition to an image matrix (4). Once the position of at least one observer's eye (6) has been determined by a control unit using inverse ray tracing, address data for activating illumination elements (LE) of the illumination matrix (1) is provided from the position data in order to prepare the defined sweet spots (5) for said observer's eye (6). To improve the reproduction quality, an additional optical component is used in ray path for the inverse ray tracing process.

Abstract: An autostereoscopic display is disclosed, in which light radiated from activated illumination elements of a light modulator is projected by an imaging means in a parallel ray bundle directed by an image reproduction matrix to one eye of a viewer as region of visibility in each case. It may be used in autostereoscopic displays so that image information for several viewers can be represented selectively either in 2D or 3D mode or in mixed mode. A multitude of illumination elements is assigned to each imaging element of the imaging means. Those illumination elements are determined that are required to generate parallel ray bundles for the current viewer position. Slight differences in the number of being activated illumination elements result in imaging disturbances in form of stray light. The stray light illuminates not only the accompanying lenticule but also adjacent lenticules, generating additional secondary parallel ray bundles.

Abstract: The invention relates to a method and device for tracking the sweet spots of a sweets spot unit for a transmissive electronic display. The aim of the invention is to improve the reproduction quality and the uniformity of illumination in displays of this type. The display contains a sweet spot unit consisting of an illumination matrix (1) and reproduction elements, in addition to an image matrix (4). Once the position of at least one observer's eye (6) has been determined by a control unit using inverse ray tracing, address data for activating illumination elements (LE) of the illumination matrix (1) is provided from the position data in order to prepare the defined sweet spots (5) for said observer's eye (6). To improve the reproduction quality, an additional optical component is used in ray path for the inverse ray tracing process.