Autostereoscopic Screen Overlapping Subpixel Strips
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Solution Overview
Problem
Conventional autostereoscopic screens produce annoying strip patterns due to head position variations, which are not effectively mitigated by existing tracking methods, leading to disturbances in the viewer's experience.
Innovation Solution
The autostereoscopic screen is designed such that adjacent subpixel strips overlap, allowing subpixels from their intersection to be activated with averaged intensity values, balancing image data from two subsets to minimize these artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tracking methods are used to adapt to changing head position, then the screen can maintain stereo image reproduction, but annoying strip patterns remain visible and shift with head movements
Solution Approach 1:
The patent applies local quality by differentiating the treatment of subpixels based on their location. Subpixels at the boundaries between strips of different subsets are identified and assigned averaged intensity values, while other subpixels use standard intensity values from their assigned subset. This localized modification at critical boundary regions eliminates the strip patterns without affecting the overall stereo image reproduction capability.
Solution Approach 2:
The patent changes the intensity parameter for specific subpixels located at strip boundaries. Instead of using the intensity value from a single subset, these boundary subpixels use an averaged intensity value calculated from both adjacent subsets. This parameter change at the boundary regions compensates for the deviations caused by head position variations and eliminates the visible strip patterns.
2Measurement precision
If subsets are defined with non-overlapping strips for clear image assignment, then each viewing zone receives dedicated subpixels, but head position variations cause visible strip patterns
Solution Approach 1:
The patent maintains the clear assignment of viewing zones to subsets for most subpixels, but introduces a local exception at the boundaries. Subpixels located at the edges where strips of different subsets meet are assigned averaged intensity values from both adjacent subsets. This localized approach preserves the unambiguous viewing zone assignment while eliminating the strip patterns that arise from head position variations.
Solution Approach 2:
The patent performs a preliminary action by pre-calculating and assigning averaged intensity values to boundary subpixels before image display. This anticipatory measure ensures that when viewers experience head position variations, the strip patterns are already compensated for in the displayed image, preventing the harmful visual artifacts before they can appear.
Data Source
AI summary
The present invention relates to an autostereoscopic screen for the simultaneous reproduction of at least two different images, in a manner such that each of these images is visible from at least one of different viewing zones, comprising a subpixel matrix, an optical element and a control unit, wherein the control unit is configured, on the subpixel matrix, to define different subsets of subpixels such that each of the subsets forms a family of parallel strips and is assigned to at least one of the viewing zones, wherein the strips of the different subsets cyclically alternate, and to activate the subpixels in dependence on image data such that each of the images is reproduced on one of the subsets, wherein the optical element has a grating-like structure aligned according to the strips, in order to lead light departing from the subpixels of each of the subsets into the viewing zone assigned to this subgroup. Thereby, the control unit is further configured to define the subsets such that two of subsets overlap, and to activate the subpixels within an intersection of these subsets, in each case with an averaged intensity value. The invention further relates to a suitable method for reproducing image information on an autostereoscopic screen.