Surface Embedded Information Grids for Stylus Positioning
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Solution Overview
Problem
Electronic devices face challenges in competing with the simplicity, reliability, and cost-effectiveness of traditional writing tools like pens and paper, particularly in accurately detecting the position and orientation of a stylus on a surface with embedded information, which is essential for effective data encoding and security features.
Innovation Solution
The use of surfaces with embedded information patterns, including grid marks and information marks, that encode data based on the position of marks relative to a grid, allowing for secure and efficient data storage and retrieval, while minimizing visual impact and using standard printing technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If surfaces include many visually detectable marks for high information density, then information encoding capacity increases, but visual clarity and aesthetic appearance deteriorate
Solution Approach 1:
The surface is divided into multiple data pages, each containing a limited number of data grids (e.g., 3x3 or 5x5 arrays). This segmentation allows high information density to be achieved across the entire surface while maintaining visual clarity within each individual data page, as the marks are distributed across multiple organized sections rather than concentrated in one area.
2Reliability
If specialized equipment is used to detect embedded information, then security and anti-counterfeiting capabilities improve, but cost and accessibility worsen
Solution Approach 1:
The encoding system is designed to be detected by multiple types of devices including electronic styluses with cameras, optical scanners, and even manual visual inspection. This multi-functionality allows the same surface marks to serve both security purposes (through automated electronic detection) and accessibility purposes (through simple visual or manual reading), eliminating the need for specialized expensive equipment while maintaining security features.
3Measurement precision
If grid marks occupy a large percentage of visually detectable marks, then position reference accuracy improves, but information encoding capacity deteriorates
Solution Approach 1:
Different regions of the surface have different mark densities and functions. Corner regions contain grid marks for position reference and orientation, while central regions contain information marks for data encoding. This local differentiation allows the grid marks to occupy only the necessary minimum space (less than 45% of total marks) while maintaining high position reference accuracy in critical areas and maximizing information encoding capacity in data-bearing areas.
Data Source
AI summary
A surface including: a plurality of visually detectable marks, wherein the visually detectable marks include: a first group of grid marks forming a grid and a second group of information marks encoding information based on positions of information marks of the second group of marks relative to the data page, wherein grid marks are less than 45% of the visually detectable marks on the surface.