Autostereoscopic Display Sub-pixel Weighting for Viewpoint Expansion
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Solution Overview
Problem
Current autostereoscopic displays using optical lenses or barriers have a narrow 'sweet spot' for viewing 3D images, limiting the number of expressible viewpoints and resulting in restricted viewing angles, which hampers the effective rendering of 3D images without the use of filters like glasses.
Innovation Solution
A rendering system and method that utilizes an inclined lens to represent multiple viewpoints as a single sub-pixel, with a pixel value change unit applying a coverage ratio as a weighted value to pixel values of sub-pixels, allowing for the representation of a wider range of viewpoints and improved rendering by adjusting pixel values based on the lens's pitch and slope.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical lenses or barriers are used for autostereoscopic display, then 3D images can be displayed without filters, but the viewing angle and number of expressible viewpoints are significantly limited
Solution Approach 1:
The patent divides each pixel into multiple sub-pixels (e.g., 3 sub-pixels per pixel in RGB arrangement) and assigns each sub-pixel to represent a specific viewpoint. This segmentation allows multiple viewpoints to be encoded within the existing pixel structure, increasing the number of expressible viewpoints without requiring additional optical devices for each viewpoint.
Solution Approach 2:
The patent introduces a viewpoint dimension by tilting the lenses at a specific angle (e.g., 45 degrees) relative to the sub-pixels. This dimensional change allows each sub-pixel to be directed toward a specific viewpoint through the tilted lens, enabling multiple viewpoints to be represented within the same physical space without increasing device complexity.
2Adaptability or versatility
If inclined lenses are used to represent multiple viewpoints per sub-pixel, then viewing angle is widened, but color distortion occurs due to the lens inclination
Solution Approach 1:
The patent applies different pixel values to different sub-pixels within the same pixel based on their specific viewpoint assignments. Each sub-pixel is treated with local quality consideration, receiving appropriately adjusted pixel values that account for the lens tilt and viewpoint direction, thereby compensating for color distortion while maintaining the widened viewing angle.
Solution Approach 2:
The patent modifies pixel values based on the lens pitch, slope, and coverage ratio to compensate for color distortion. By dynamically adjusting pixel parameters (brightness, color intensity) according to the geometric properties of the inclined lens and the assigned viewpoint, the system maintains color accuracy across multiple viewpoints while preserving the expanded viewing angle.
3Measurement precision
If pixel values are adjusted using coverage ratio as weighted value, then rendering accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent pre-calculates the coverage ratio for each sub-pixel based on the lens pitch, slope, and geometric relationships during the display setup phase. These pre-computed coverage ratios are stored and reused during rendering operations, eliminating the need for real-time complex geometric calculations and reducing processing complexity while maintaining high rendering accuracy.
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 approach enhances the rendering of 3D images by increasing the number of expressible viewpoints and widening the viewing angle, reducing color distortion caused by inclined lenses, and enabling more effective autostereoscopic multi-view displays.
Implementation Method 1
an image may be spatially divided using an optical device... As an optical lens, a lenticular lens may be used by which respective pixel images are displayed only in a predetermined direction
Data Source
AI summary
A rendering system and method based on a weighted value of a sub-pixel region are provided. The rendering system may change a pixel value of a single sub-pixel using pixel values of sub-pixels that represent, as respective central viewpoints, a plurality of viewpoints represented by the single sub-pixel based on an inclined lens, and may perform rendering using the changed pixel value.