Spatial Light Modulator Tile Resolution for Gap Filling
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Solution Overview
Problem
Existing projection devices for spatial light communication face challenges in filling gaps between dots constituting an image displayed by projection light, particularly without using mechanically operating mechanisms.
Innovation Solution
A projection device that includes a light source emitting parallel light, a spatial light modulator with a modulation part that modulates the phase of the parallel light, and a control unit that tiles the modulation part with tiles of at least two resolutions, setting a phase image on each tile, and directing the light source to radiate parallel light towards the modulation part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the technique of PTL 1 is applied to spatial light communication, then a high-definition image can be projected without a projection lens, but a gap is generated between dots constituting an image formed by projection light, preventing communication with targets entering between dots
Solution Approach 1:
The modulation part is divided into multiple tiles of different resolutions. Higher-resolution tiles are positioned to fill gaps between dots, while lower-resolution tiles maintain overall image structure. This segmentation allows precise control of light distribution to eliminate gaps without compromising image definition.
Solution Approach 2:
Different regions of the modulation part have different local qualities through varying tile resolutions. Areas requiring gap filling use higher-resolution tiles, while other areas use lower-resolution tiles appropriate to their function. This local differentiation resolves the contradiction between image definition and gap elimination.
2Object-generated harmful factors
If Lissajous scanning using a biaxial resonant MEMS mirror is used, then gaps between dots can be eliminated, but mechanical operation is required to fill the gaps
Solution Approach 1:
The patent replaces the mechanical MEMS mirror scanning system with a static modulation part that uses optical diffraction principles. By designing the modulation part with specific tile configurations, gap filling is achieved through optical physics rather than mechanical movement, eliminating the need for complex mechanical operation.
Solution Approach 2:
Instead of using a single high-resolution tile, the patent uses multiple tiles of different resolutions that collectively reproduce the effect of a high-resolution image. The higher-resolution tiles are positioned strategically to fill gaps, creating a composite effect equivalent to mechanical scanning without the mechanical complexity.
3Object-generated harmful factors
If a light scanning means is used to scan light flux from a light modulation element, then gaps between dots can be eliminated, but mechanical operation is required to fill the gaps
Solution Approach 1:
The patent eliminates the need for light scanning means by using a static modulation part with strategically positioned tiles of different resolutions. The gap-filling effect is achieved through the optical diffraction properties of the tile configuration rather than mechanical scanning, replacing a complex mechanical system with a simpler optical design.
4Object-generated harmful factors
If multiple tiles of different resolutions are used, then gaps between dots can be complemented without mechanical mechanisms, but the device complexity increases
Solution Approach 1:
The modulation part is segmented into multiple tiles of different resolutions, with higher-resolution tiles positioned to fill gaps between dots. This segmentation allows the system to achieve gap filling without mechanical mechanisms, as each tile independently contributes to the overall light distribution pattern.
Solution Approach 2:
The patent changes the resolution parameter of different tiles to optimize their function. Higher-resolution tiles are used where gap filling is critical, while lower-resolution tiles are used where they can maintain structural integrity. This parameter differentiation achieves gap complementation through controlled optical diffraction without requiring complex mechanical operation.
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 enables the projection device to complement gaps between dots in the image without mechanical mechanisms, ensuring effective communication and image display in spatial light communication.
Implementation Method 1
a spatial light modulator including a modulation part that modulates a phase of the parallel light emitted from the light source
Implementation Method 2
a projection optical system that projects light modulated by the spatial light modulator as the projection light
Data Source
AI summary
A projection device includes a light source that emits parallel light, a spatial light modulator including a modulation part that modulates a phase of the parallel light emitted from the light source, a control unit that tiles the modulation part with tiles of at least two resolutions in which a phase image related to an image displayed by projection light being set, sets the phase image to each of the plurality of tiles that are tiled, and causes the light source to radiate the parallel light toward the modulation part in which the phase image is set; and, and a projection optical system that projects light modulated by the spatial light modulator as the projection light.