Tilted Grating Elements for Autostereoscopic Display
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Solution Overview
Problem
Conventional autostereoscopic display devices often suffer from Moire patterns due to the interference between regularly spaced grating elements and the underlying display panel grid, which detracts from the 3D viewing experience by creating uncomfortable dark bands.
Innovation Solution
The autostereoscopic display apparatus features a grating device with tilted grating elements that form a non-zero angle with respect to the diagonal direction of the display elements, reducing Moire patterns by guiding light into predetermined viewing directions, and a controller for image processing to compensate for irregularities in the intersection between grating and display elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If regularly spaced grating elements are used in conventional autostereoscopic display apparatus, then the 3D display function is achieved, but Moire patterns appear as dark bands across the screen
Solution Approach 1:
The patent applies asymmetry by tilting the grating elements at a specific angle (e.g., 45 degrees) relative to the horizontal direction, rather than aligning them horizontally or vertically. This asymmetric orientation disrupts the periodic alignment between grating elements and display panel pixels, thereby eliminating Moire patterns while preserving the 3D display function.
Solution Approach 2:
The patent changes the orientation parameter of the grating elements from conventional horizontal/vertical alignment to a tilted angle (e.g., 45 degrees). This parameter change fundamentally alters the interference pattern between grating and display panel, transforming the harmful Moire patterns into acceptable or invisible patterns while maintaining 3D viewing capability.
2Object-generated harmful factors
If grating elements are tilted to reduce Moire patterns, then Moire pattern is reduced, but the complexity of device configuration increases
Solution Approach 1:
The patent simplifies the configuration process by establishing a standard tilted angle (e.g., 45 degrees) as the preferred parameter setting. This standardized parameter reduces the complexity of device configuration, as manufacturers only need to adjust the tilt angle rather than designing custom grating orientations for each application.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces or eliminates Moire patterns, enhancing the 3D viewing experience by ensuring even light separation and display quality, with adjustable angles and shifts in the grating elements to accommodate various display panels.
Implementation Method 1
grating elements configured to cover the plurality of display elements to guide lights associated with three-dimensional (3D) display into predetermined viewing directions
Implementation Method 2
grating elements... to guide lights associated with three-dimensional (3D) display into predetermined viewing directions
Data Source
AI summary
An autostereoscopic display apparatus is provided for three-dimensional (3D) display. The autostereoscopic display apparatus includes a display panel having a plurality of display elements arranged in a two-dimensional array. The autostereoscopic display apparatus also includes a grating device coupled to the display device and having a plurality of grating elements to guide lights associated with 3D display into predetermined viewing directions. Further, the plurality of grating elements cover the plurality of display elements and are tilted such that a tilted direction of the plurality of grating elements form a non-zero angle with respect to a diagonal direction of the plurality display elements.