Light-field Display Microlens Pixel Mapping
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Solution Overview
Problem
3-D displays often yield distortions in the perceived light-field due to the flat display surface causing focus cues to specify the depth of the monitor rather than the depicted scene, leading to an inaccurate representation of the 3-D structure.
Innovation Solution
A light-field display system that uses a microlens array positioned in front of a monitor, dynamically assigning pixels to microlenses based on the position of viewing apertures, ensuring that each pixel is visible through at most one microlens, and re-rendering pixels as the apertures change, allowing accurate rendering of a light-field at multiple viewing positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat display surface is used to present images, then the device complexity is reduced and ease of manufacture is improved, but the accuracy of light-field representation deteriorates due to focus cues specifying the depth of the monitor rather than the depicted scene
Solution Approach 1:
The display surface is segmented into multiple independent light sources (LEDs arranged in a grid pattern) that can be individually controlled. This segmentation allows different regions of the display to emit light with different focal depths, enabling accurate light-field representation while maintaining manufacturing simplicity through modular LED construction.
Solution Approach 2:
The invention transitions from a two-dimensional flat display surface to a three-dimensional light-field display by adding the depth dimension through multiple focal planes. LEDs are positioned at different depths and angles to create light rays that converge at various focal points, accurately representing the 3-D structure of portrayed objects.
2Manufacturing precision
If a microlens array is added to enable accurate light-field rendering, then the accuracy of 3-D representation is improved, but the device complexity increases
Solution Approach 1:
The microlens array component is extracted and replaced with individual microlenses positioned directly over each LED or group of LEDs. This simplification removes the need for a complex integrated microlens array while maintaining the light-field rendering capability through simpler, separately positionable microlenses.
Solution Approach 2:
The system dynamically adjusts which LEDs are activated and their emission characteristics based on the desired focal depth and viewing angle. This dynamic control allows the same physical structure to render light-fields at multiple depths without requiring complex mechanical adjustments or additional components.
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 solution enhances the accuracy of the 3-D light-field representation by ensuring that focus cues correctly indicate the depth of the virtual objects, reducing distortions and providing a more faithful impression of the 3-D structure, thereby improving the viewer's perception of depth.
Implementation Method 1
A microlens array may be positioned in front of a display at a separation distance
Data Source
AI summary
A light-field display is provided that renders a light-field at one or more viewing apertures through a microlens array. The light-field display includes a display such as a monitor that is positioned behind the microlens array. The monitor and the microlens array are positioned so that light emitted from a pixel of the monitor reaches the one or more apertures through at most one microlens from the microlens array. For each microlens in the microlens array, the pixels of the monitor visible through that microlens of the microlens array at the one or more apertures is determined, and a light-field is then rendered at each of the one or more viewing apertures by rendering the determined pixels corresponding to each microlens.