Tiled Fiber Scanner Array for High-Resolution Micro-Display
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Solution Overview
Problem
Fiber scanned displays face limitations in achieving high-resolution images, particularly for high-definition or video content due to the small size of fiber scanners, which restricts their resolution and ability to handle high-definition image projection effectively.
Innovation Solution
A tiled array of fiber scanners arranged in a polygonal pattern, such as hexagonal, with multiple fiber scanners operating at various scan frequencies to produce high-resolution images, including a 12-mm diagonal with resolutions of five-megapixels or higher, and incorporating techniques like Monte Carlo simulations and geometric registration for seamless image production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single fiber scanner is used, then the device size is small, but the image resolution is limited
Solution Approach 1:
The display system is divided into multiple fiber scanner modules arranged in a tiled array. Each module contains a fiber scanner that scans a portion of the overall image, with multiple scanners working in parallel to collectively produce the complete high-resolution image, thereby achieving both compact size and high resolution
2Manufacturing precision
If multiple fiber scanners are tiled together, then the image resolution increases, but the device complexity increases
Solution Approach 1:
Multiple fiber scanner modules are combined into a tiled array configuration where each module integrates the fiber scanner, piezoelectric actuator, and projection optics into a unified compact unit. This merging approach allows parallel operation of multiple scanners while managing system complexity through modular integration
3Productivity
If fiber scanners operate at high scan frequencies, then the refresh rate increases, but the image quality may deteriorate
Solution Approach 1:
The fiber scanners operate at controlled periodic scan frequencies (e.g., 10-50 kHz) with synchronized scanning patterns across all modules. This periodic action enables high refresh rates while maintaining image quality through coordinated timing and consistent scan parameters across the tiled array
4Area of stationary object
If a hexagonal pattern is used for fiber scanners, then the image coverage is improved, but the alignment precision requirements increase
Solution Approach 1:
The fiber scanners are arranged in a hexagonal (polygonal) pattern rather than a traditional rectangular grid, providing improved circular image coverage and reducing unused display area. This asymmetric geometric arrangement optimizes space utilization while managing alignment requirements through the inherent symmetry of the hexagonal configuration
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 the creation of high-resolution, seamless images with improved Michelson contrast and flexibility in aspect ratios, suitable for applications like head-mounted displays, by effectively combining the outputs of multiple fiber scanners to achieve resolutions over 5 mega-pixels with Michelson contrast of 0.5 or better.
Implementation Method 1
a single-core or multi-core scan fiber disposed within a piezoelectric actuator tube
Implementation Method 2
Fiber scanned displays involve the use of an optical fiber cantilever scanned in one or two dimensions to project light out of the end of the fiber to form an image
Data Source
AI summary
The tiled array of fiber scanners includes multiple fiber scanners arranged in a polygonal pattern determined based on analysis results. Multiple fiber scanners generate multiple component images tiled to form a seamless overall image. A fiber scanner is devised through analysis and includes projector optics, a single-core or multi-core scan fiber disposed within an actuator tube coupled with the projector optics within a housing tube according to analysis results and one or more compensators.