Per-Pixel Shifting Display Apparatus for Moiré Elimination
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Solution Overview
Problem
Conventional display devices with fixed grids of pixels suffer from limited contrast resolution, leading to suboptimal reproduction of non-horizontal or vertical features, such as jagged edges, and undesirable effects like the moiré effect, resulting in poor image quality.
Innovation Solution
A display apparatus incorporating per-pixel shifting, utilizing a liquid-crystal device and control circuit to shift light from pixels to precise target positions on an image plane, with individual drive signals generated for each pixel to achieve sub-micrometer accuracy, thereby enhancing contrast resolution and eliminating moiré effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed grid of pixels is used for displaying images, then the device structure is simple and easy to manufacture, but the contrast resolution is limited and non-horizontal or vertical features appear jagged
Solution Approach 1:
The patent divides the pixel array into multiple groups (e.g., first group and second group of pixels) with different orientations. Each group's light can be independently controlled by corresponding liquid crystal portions, allowing selective shifting of light from different pixel groups to different target positions. This segmentation enables precise control over light propagation directions to achieve high contrast resolution for features at various orientations.
Solution Approach 2:
The patent introduces dynamically controllable liquid crystal structures between the pixel array and image plane that can change their light-shifting properties in real-time. By applying different voltages to different portions of the liquid crystal structure, the system can dynamically adjust which pixel groups direct light to which target positions, enabling adaptive optimization of image quality for different display content.
2Manufacturing precision
If a fixed grid of pixels is used, then the manufacturing process is simple, but slanting edges appear jagged and sharp features produce moiré effects
Solution Approach 1:
The patent introduces liquid crystal structures as intermediary elements between the fixed pixel grid and the image plane. These liquid crystal portions act as mediators that can shift light from pixels to different target positions, effectively decoupling the fixed manufacturing grid from the desired image features. This intermediary layer enables smooth rendering of slanting edges by redirecting light to compensate for the fixed grid limitations.
3Measurement precision
If individual drive signals are generated for each pixel to shift light to precise target positions, then sub-micrometer accuracy is achieved and moiré effects are eliminated, but the control circuit complexity increases
Solution Approach 1:
The patent combines multiple pixel groups (first group and second group) that share common control characteristics into groups controlled by the same liquid crystal portions. Instead of requiring completely independent control for every single pixel, the system merges control functions at the liquid crystal portion level, reducing the total number of independent control channels needed while maintaining precise light shifting capability.
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
The solution enables high-quality, high-contrast image rendering with precise control of light shifting, ensuring that features like slanting edges appear accurate and smooth, significantly improving the viewing experience by achieving infinite contrast resolution.
Implementation Method 1
a liquid-crystal structure arranged in front of the array of pixels, wherein a plurality of portions of the liquid-crystal structure are arranged in front of corresponding pixels of said array
Implementation Method 2
a control circuit comprising a plurality of circuit elements that are to be employed to electrically control corresponding portions of the liquid-crystal structure to shift light emanating from the corresponding pixels to corresponding target positions on an image plane
Data Source
AI summary
A display apparatus including: image renderer having array of pixels; liquid-crystal device comprising: liquid-crystal structure, wherein portions of liquid-crystal structure are arranged in front of corresponding pixels of said array; and control circuit including circuit elements employed to electrically control corresponding portions of liquid-crystal structure to shift light emanating from corresponding pixels to corresponding target positions; and processor(s) configured to: generate individual drive signals for circuit elements, based on corresponding target positions to which light emanating from corresponding pixels are to be shifted upon passing through corresponding portions of liquid-crystal structure; and send individual drive signals to control circuit to drive circuit elements to address corresponding portions of liquid-crystal structure separately, whilst displaying output image frame via image renderer.