Character Size Gradient for Perspective Compensation
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Solution Overview
Problem
When reading materials placed on a horizontal surface, characters appear smaller at the top than at the bottom due to perspective distortion, leading to discomfort and eye fatigue during extended reading sessions.
Innovation Solution
A printing method where characters are gradually enlarged from the bottom to the top of the page, with specific size magnification ratios to maintain perceived character size consistency across the page, allowing for comfortable reading without eye strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If characters are printed with uniform size across the page, then manufacturing is simple and consistent, but characters appear smaller at the top when viewed from a diagonal position on a horizontal surface
Solution Approach 1:
The patent applies local quality by varying character sizes across different regions of the page. Characters at the top are printed larger than those at the bottom, creating a gradient effect that compensates for perspective distortion. This local variation in character size ensures that all characters appear approximately the same size when viewed from a diagonal position on a horizontal surface, thereby improving reading comfort without requiring complex manufacturing processes.
2Ease of operation
If the printing surface is positioned perpendicular to the viewing direction to eliminate perspective distortion, then character size perception is consistent, but reading comfort deteriorates due to extended viewing time
Solution Approach 1:
The patent applies parameter changes by modifying the character size parameter across the vertical dimension of the page. Instead of changing the physical orientation of the printing surface, the invention varies the size parameter of characters at different positions. This creates an optical illusion that compensates for perspective effects, allowing readers to maintain a comfortable horizontal viewing position while perceiving consistent character sizes throughout the text.
Data Source
AI summary
A printing method is provided, in which character sizes are enlarged gradually as going from a lower portion to an upper portion of a printing surface which may be a page of a book or an article region on which an article of a newspaper is printed. The longitudinal size (height) of characters at a lowest portion in each page of the book or in the article region is k times larger than a longitudinal size of characters at a highest portion, and wherein a value of k is about 1.28˜1.79. The horizontal size (width) of characters at the lowest portion in each page of the book or in the article region is k′ times larger than a longitudinal size of characters at a highest portion, and wherein a value of k′ is about 0.7˜1.0 times larger than the k.