Tileable Horizontal Parallax Light Field Display with Low Cross-Talk
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Solution Overview
Problem
Existing 3D displays face challenges in providing a high number of horizontal views without restricting viewer position, managing cross-talk between adjacent views, and ensuring seamless transitions and scalable resolution.
Innovation Solution
A freeform lenslet array is used to collimate light from a collimated pixel display, producing M×N unique horizontal viewing directions with controlled vertical spread, and a collimated backlight structure minimizes light spill-over and adjusts brightness for seamless tiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If slanted cylindrical lenticular lenses are applied to increase the number of horizontal views, then the number of views increases by a factor of 3, but the vertical resolution is divided by 3 and cross-talk between adjacent images occurs
Solution Approach 1:
The display is divided into multiple viewing zones, each associated with a specific view angle. The parallax barrier is segmented into multiple layers or regions, each controlling light for a particular view direction, allowing independent optimization of each zone to reduce cross-talk while maintaining high view counts.
Solution Approach 2:
The patent transitions from 2D display to 3D light field display by adding the viewing angle dimension. Multiple views are created by controlling light propagation in different angular directions, effectively adding a third dimension to the display space without sacrificing vertical resolution.
2Manufacturing precision
If the number of horizontal views is increased to provide high-resolution displays, then viewing resolution improves, but cross-talk between adjacent views increases and blends views together
Solution Approach 1:
A parallax barrier or lens array is introduced as an intermediary optical element between the display and the viewer. This intermediary selectively directs light from different pixels to different viewing angles, acting as a mediator that separates views spatially and prevents cross-talk while maintaining high horizontal resolution.
Solution Approach 2:
Different regions of the display are optimized for different viewing characteristics. The parallax barrier or lens array is designed with locally varying properties, where each region is tailored to control light for a specific view angle, ensuring high resolution and minimal cross-talk in each local viewing zone.
3Quantity of substance
If optical view replication is applied to replicate multiple views in discrete viewing zones, then the same set of multiple views are replicated, but viewer positions are restricted to limited zones and freedom to move is limited
Solution Approach 1:
The display system dynamically adapts to viewer position by continuously providing appropriate parallax views. Instead of static viewing zones, the system uses dynamic control of light direction through the parallax barrier or lens array, allowing viewers to move freely while maintaining correct view assignment based on their current position.
Solution Approach 2:
The display system is designed to serve multiple viewing angles and positions simultaneously. The parallax barrier or lens array is configured to provide correct view assignment for a wide range of viewing positions, making the system universally applicable to different viewer locations without restriction.
4Ease of operation
If cylindrical lenticular lenses are used to deflect light in one direction, then horizontal viewing angles are controlled, but light spill-over occurs and transition between adjacent views is poor
Solution Approach 1:
Cylindrical lenticular lenses with curved surfaces are used to deflect light in horizontal directions. The curved lens surfaces provide precise angular control of light rays, creating well-defined viewing zones with smooth transitions between adjacent views and minimizing light spill-over.
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 a high-resolution, scalable, and seamless 3D display with minimal cross-talk and controlled transitions, allowing viewers to move freely and maintain consistent brightness across viewing angles.
Implementation Method 1
A freeform lenslet array receiving the collimated light from the M by N collimated pixel display portion and directing light from each pixel into a defined horizontal viewing angle while spreading the light over a range of vertical viewing angles
Implementation Method 2
The light from each pixel in the M by N matrix being collimated
Data Source
AI summary
A tileable collimated multi-view pixel display with horizontal parallax, comprising a novel arrangement of horizontal parallax multi-view pixel elements that are placed in front of a collimated pixel display. The display provides a horizontal parallax multi-view pixel element out of an arbitrary portion of a collimated pixel display of M horizontal by N vertical pixels (collimated pixel display portion) to generate M×N unique horizontal viewing directions.