Curved Grating Structure for Naked Eye 3D Display Viewing Area
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Solution Overview
Problem
Current naked eye 3D display technologies using curved grating structures have limited optimum viewing areas, leading to interference when viewers move relative to the display, restricting the longitudinal viewing space and overall 3D experience.
Innovation Solution
A curved grating structure with progressively decreasing grating intervals from the center to the terminal, designed using a nonlinear formula (Wn = an^2 * a1^2 + a2^2 + ... + aN^2 * θ^2 * R) and symmetrical grating intervals on either side of the normal vector, expands the optimum viewing area in the longitudinal direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a curved grating structure with uniform grating intervals is used, then the structure is simple to manufacture, but the optimum viewing area is limited and crosstalk occurs when viewers move
Solution Approach 1:
The patent applies local quality by varying the grating intervals according to position - the intervals are smaller near the center of the curved grating structure and larger toward the edges. This non-uniform distribution is designed to expand the optimum viewing area in the longitudinal direction while maintaining manufacturing feasibility through a defined mathematical relationship
Solution Approach 2:
The patent changes the grating interval parameter along the length of the curved grating structure. Specifically, the grating interval decreases from the center toward both ends according to a quadratic relationship, which optimizes the viewing area expansion while reducing crosstalk between different viewpoint images
2Area of stationary object
If the grating intervals are decreased uniformly across the structure, then the viewing area expands, but the structure becomes asymmetric and harder to manufacture
Solution Approach 1:
The patent intentionally introduces asymmetry in the grating interval distribution relative to the curvature direction, with intervals varying quadratically from center to edge. However, it maintains symmetry about the central axis perpendicular to the curvature plane, balancing manufacturing ease with viewing area expansion
Solution Approach 2:
The patent utilizes the curved geometry of the grating structure and relates the grating intervals to the curvature radius. The quadratic relationship between grating interval and position along the curve leverages the curved surface geometry to achieve viewing area expansion while maintaining a manufacturable structure
Data Source
AI summary
A curved grating structure, a display panel and the display device are provided. The curved grating structure includes multiple grating strips spaced from each other. Grating intervals between adjacent grating strips are successively decreased from a center point of the curved grating structure to a terminal of the curved grating structure. The grating interval between two adjacent grating strips is a distance in a first direction between center points of the two adjacent grating strips, and the first direction is a direction perpendicular to a normal vector of the curved grating structure passing through a center point of the curved grating structure.