Display Medium Information Code Structure for Reliable Gray-Level Reading
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Solution Overview
Problem
Existing information codes are prone to reading failures due to difficulty in distinguishing light and dark gray cells caused by light incidence, leading to inconsistent code recognition.
Innovation Solution
The information code is generated by combining a first and second code, incorporating central light and dark color cells with surrounding regions to maintain distinct cell identities, allowing for robust reading even under varying light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If light gray cells and dark gray cells are used in information codes, then more information can be encoded, but reading failures increase due to difficulty in distinguishing cells under varying light conditions
Solution Approach 1:
The patent segments each cell into multiple distinct regions (central region and outer region) with different color patterns. This segmentation allows the code to encode more information through region combinations while maintaining clear visual distinction between cell types, resolving the contradiction between information capacity and reading reliability.
Solution Approach 2:
The patent applies different color patterns to different regions within cells - central light color cells have light central regions with dark outer regions, while central dark color cells have dark central regions with light outer regions. This local quality differentiation ensures that each cell type has a unique visual signature that can be reliably distinguished under varying light conditions, while still enabling expanded information encoding.
2Reliability
If central light color cells and central dark color cells with surrounding regions are introduced, then cell distinction under varying light conditions is improved, but code structure complexity increases
Solution Approach 1:
The patent introduces asymmetry in cell structure by creating central light color cells with light central regions and dark outer regions, versus central dark color cells with dark central regions and light outer regions. This asymmetric design provides clear visual distinction for reliable reading while maintaining a systematic structure that can be generated through consistent rules, thus managing complexity.
Solution Approach 2:
The patent implements a nested structure where central regions are surrounded by outer regions within each cell. This nesting approach allows the code to maintain a hierarchical organization that simplifies generation and interpretation, even though individual cells have complex multi-region structures. The nested design enables systematic processing while achieving enhanced reliability.
Data Source
AI summary
An information code, which is displayed on a display medium, is generated by combining a first code and a second code. In each of the first code and the second code, information is recorded by multiple cells arranged in a two-dimensional array. The information code includes: a light color cell; a dark color cell; a central light color cell which includes a central light color region and an outer dark color region, the central light color region being surrounded by the outer dark color region within the central light color cell; and a central dark color cell which includes a central dark color region and an outer light color region, the central dark color region being surrounded by the outer light color region within the central dark color cell.