2D Polygon Scanner Facet Tilt for HD Display Scanning
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Solution Overview
Problem
High-definition display systems face challenges in meeting scanning requirements due to high scanning rates and limited space for optical paths, making it difficult for conventional vertical scanners to accommodate high resolution and rapid refresh rates.
Innovation Solution
A two-dimensional polygon scanner with reflective facets tilted at different angles is used to scan optical beams horizontally, eliminating the need for simultaneous vertical scanning, and a vertical adjuster is employed to adjust beam positions during blanking times, allowing for interlaced scanning patterns without the conventional vertical scanner's performance constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional vertical scanners are used to scan optical beams horizontally and vertically, then high-definition display requirements can be met, but the system requires large space for optical paths and cannot achieve high scanning rates
Solution Approach 1:
The patent combines horizontal and vertical scanning functions into a single two-dimensional polygon scanner. The polygon scanner has multiple facets tilted at different angles, where each facet performs both horizontal scanning (through rotation) and vertical positioning (through fixed tilt angle), eliminating the need for separate vertical scanner and reducing optical path space while maintaining high scanning rates
Solution Approach 2:
The two-dimensional polygon scanner serves multiple functions simultaneously: it performs horizontal scanning through rotation, vertical beam positioning through differently tilted facets, and beam deflection all in one device. This multi-functional design replaces conventional separate scanners and reduces the overall system space requirement
2Manufacturing precision
If conventional vertical scanners are used to accommodate high resolution, then scanning requirements can be met, but the device complexity increases
Solution Approach 1:
The patent merges the vertical scanner and horizontal polygon scanner into a single integrated two-dimensional polygon scanner. This consolidation reduces device complexity by eliminating the need for multiple separate scanning components while maintaining high manufacturing precision through the carefully designed facet tilt angles that enable both horizontal and vertical scanning functions
Solution Approach 2:
The polygon scanner is segmented into multiple facets, each with specific tilt angles, where each facet independently handles a portion of the scanning task. This segmentation allows the system to achieve high resolution through multiple discrete scanning lines while keeping each individual facet's manufacturing requirements manageable
3Ease of operation
If a two-dimensional polygon scanner with multiple tilted facets is used to scan optical beams horizontally at different vertical positions, then the technical performance requirements for vertical adjusters are reduced, but the polygon scanner complexity increases
Solution Approach 1:
The two-dimensional polygon scanner is designed to perform both horizontal scanning and vertical beam positioning functions within a single device. By incorporating facets with different fixed tilt angles, the scanner eliminates the need for complex vertical adjusters, as the vertical positioning is inherently built into the facet geometry rather than requiring active adjustment mechanisms
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 approach reduces the technical performance requirements for vertical adjusters, enabling the use of alternative beam deflection devices and improving image quality by maintaining horizontal scanning while adjusting vertical positions, thus supporting high-definition displays with enhanced efficiency and flexibility.
Implementation Method 1
a polygon scanner positioned in optical paths of the optical beams. The polygon scanner includes a rotation axis around which the polygon scanner rotates to scan the optical beams horizontally on the surface
Implementation Method 2
a plurality of polygon facets that are sized to simultaneously receive the optical beams and comprise a plurality of reflective polygon facets are tilted with respect to the rotation axis at different facet tilt angles, respectively, to scan the optical beams horizontally at different vertical positions on the surface, respectively
Data Source
AI summary
Scanning beam systems based on a two-dimensional polygon scanner with different reflective polygon facets tilted at different tilt facet angles to use rotations of the polygon scanner to scan one or more optical beams both horizontally and vertically on a surface which can be a display screen or a printing surface.