Asymmetrical Deflectors for Light Guide Plate Image Formation
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Solution Overview
Problem
The manufacturing cost of light guide plates increases with the size of the surface area filled with deflectors, and the ability to transmit light decreases due to the need for a larger surface area of deflectors, which affects the efficiency of displaying two-dimensional images stereoscopically.
Innovation Solution
The optical device employs a light guide plate with deflectors configured to converge or radiate light towards specific convergence points or lines, allowing for asymmetrical and oriented deflection surfaces that reduce the required surface area of deflectors, ensuring light rays pass through specific observation positions, thereby optimizing image formation and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surface area of deflectors on the light guide plate is increased to improve image formation, then the manufacturing cost increases and light transmission ability decreases
Solution Approach 1:
The deflector is designed with asymmetrical orientation where one surface has a first orientation and the other surface has a second orientation different from the first. This asymmetrical configuration allows the deflector to effectively guide light to specific convergence points while minimizing the required surface area, thereby reducing manufacturing cost while maintaining image formation capability
Solution Approach 2:
Different surfaces of the deflector are configured with different orientations tailored to specific functional requirements. The first surface is oriented to receive light from one direction while the second surface is oriented to direct light to a specific convergence point, optimizing light guidance efficiency with minimal surface area
2Reliability
If the surface area of deflectors on the light guide plate is increased to improve image formation, then the light transmission ability of the light guide plate decreases
Solution Approach 1:
The asymmetrical deflector configuration with differently oriented surfaces enables efficient light redirection with minimal surface area occupation. This reduces the overall deflector coverage on the light guide plate, preserving more transparent areas for optimal light transmission while maintaining effective image formation capability
Solution Approach 2:
The light guide plate is designed with discrete, segmented deflectors positioned at specific locations rather than continuous coverage. Each deflector is strategically placed and oriented to handle specific light paths, minimizing the total surface area occupied by deflectors and maximizing the transparent areas for light transmission
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 configuration enhances the efficiency of light transmission and reduces manufacturing costs by minimizing the surface area needed for deflectors, while ensuring effective image formation and perception, even when the observer's position is predictable.
Implementation Method 1
a plurality of deflectors configured to deflect light guided thereto by the light guide plate, causing light forming an image in a space outside the light guide plate to exit from the emission surface
Data Source
AI summary
An optical device includes a light guide plate configured to guide light within a plane parallel to an emission surface, and a plurality of deflectors configured to deflect light guided thereto by the light guide plate, causing light forming an image in a space outside the light guide plate to exit from the emission surface. Each deflector in the plurality of deflectors cause the light to exit from the emission surface toward a direction substantially converging onto a single convergence point or convergence line in the space, or to substantially radiate from a single convergence point or convergence line in the space. The convergence point or the convergence line is mutually different among the plurality of deflectors with a grouping of a plurality of the convergence points or the convergence lines forming the image in the space.