Fold Mirror Two-Axis Beam Scanner for Compact Display Depth
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Solution Overview
Problem
Scanning-beam display systems face challenges in reducing depth without increasing cost, particularly in large-scale displays where complex optical paths are often required to address multiple display regions.
Innovation Solution
The integration of a fold mirror into a two-axis scanner system, which includes a resonant mirror and a linear mirror chip, allows for reduced depth and cost by eliminating the need for complex beam splitting optics and polygon mirror scanners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If complex optical paths are used to address multiple display regions in large-scale displays, then the display can cover larger areas, but the depth of the system increases
Solution Approach 1:
The patent introduces a fold mirror that changes the optical path from a linear sequence to a folded configuration, effectively using spatial dimensionality to reduce the depth required for addressing multiple display regions while maintaining the same scanning functionality
2Adaptability or versatility
If complex optical paths and polygon mirror scanners are used, then multiple display regions can be addressed, but the system cost increases
Solution Approach 1:
The patent extracts and eliminates the need for polygon mirror scanners and complex beam splitting optics by using a simpler fold mirror configuration combined with resonant and linear mirrors, thereby reducing device complexity while maintaining the ability to address multiple display regions
Solution Approach 2:
The patent merges the functions of multiple optical components (beam splitting, polygon scanning, fold mirrors) into a more integrated and simpler configuration using resonant mirrors, linear mirrors, and fold mirrors, reducing the overall number of components and system complexity
3Adaptability or versatility
If complex beam splitting optics and polygon mirror scanners are used, then multiple display regions can be addressed, but the manufacturing cost increases
Solution Approach 1:
The patent replaces expensive polygon mirror scanners and complex beam splitting optics with more affordable resonant mirrors, linear mirrors, and fold mirrors that can be manufactured at lower cost while achieving the same multi-region addressing capability
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 decreases the depth of the display system while maintaining image quality, reducing optical distortions, and lowering costs, as it allows for a more compact and efficient scanning mechanism.
Implementation Method 1
a resonant mirror configured to scan the light beam along a first scanning direction
Implementation Method 2
a linear mirror chip configured to scan the light beam along a second scanning direction... the linear mirror arranged to redirect the light beam from the resonant mirror
Implementation Method 3
The fold mirror is positioned to reflect the light beam from the light source to the resonant mirror
Implementation Method 4
Some display screens comprise fluorescent material, and the optical beam causes portions of the fluorescent material to fluoresce to the form images
Data Source
AI summary
A display system includes a display screen, a light source to generate a light beam to be modulated in accordance with image data, and a beam scanning module to receive the light beams and to direct the light beam onto an associated display region of the display screen. The beam scanning module includes a resonant mirror configured to scan the light beam along a first scanning direction across the associated display region, and a linear scanning mirror to scan the light beam along a second scanning direction across the associated display region. The beam scanning module also includes an integral fold mirror positioned to reflect the light beam from the light source to the resonant mirror.