Scalable Laser Marking Fonts for Thin Film Substrates
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Solution Overview
Problem
Existing laser marking systems are limited by fixed font definitions that do not scale, leading to inconsistent mark quality and increased risk of substrate puncture, especially on thin films, as they require multiple fonts for different resolutions and cannot effectively trade off speed and quality without changing fonts.
Innovation Solution
A scalable font definition system that defines character segments instead of individual pixels, allowing for uniform pixel spacing and adjustable resolution, enabling a single font to scale to any size while maintaining consistent mark quality and reducing the risk of substrate puncture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fixed pixel grid fonts are used for laser marking, then the marking speed can be maintained at constant levels, but the image quality becomes inconsistent and the risk of substrate puncture increases
Solution Approach 1:
The patent implements dynamic pixel spacing where the distance between adjacent pixels varies based on their position within the character. Pixels along continuous paths (especially diagonals) have larger spacing to reduce cumulative energy deposition, while pixels at character boundaries or isolated positions have smaller spacing to maintain definition. This dynamic adjustment resolves the contradiction by adapting pixel distribution to local requirements, improving image quality while reducing substrate puncture risk.
Solution Approach 2:
The patent applies different pixel spacing strategies to different regions within a character. Boundary pixels use smaller spacing to define character edges clearly, while interior pixels along continuous strokes use larger spacing to reduce energy accumulation. This local differentiation allows the system to maintain manufacturing precision at critical locations while minimizing harmful effects in regions where they are less critical.
2Adaptability or versatility
If multiple fixed-resolution fonts are maintained for different quality levels, then various mark qualities can be achieved, but the device complexity increases
Solution Approach 1:
The patent creates a universal font structure that can adapt to different quality requirements through a single parameter: pixel spacing. Instead of maintaining separate font files for different resolutions, the system uses one font definition with dynamic pixel spacing calculations that adjust based on the desired quality level and character size. This single font serves multiple functions across different quality settings, eliminating the need to maintain multiple fixed-resolution fonts.
Solution Approach 2:
The patent changes the pixel spacing parameter dynamically based on character position, size, and desired quality level. By adjusting this single parameter rather than changing entire font definitions, the system achieves versatility in quality adjustment while maintaining simplicity. The same font file can produce different quality outputs by modifying pixel spacing calculations, eliminating the need for multiple font files.
3Ease of manufacture
If uniform pixel spacing is used in dot matrix fonts, then the marking process is simple, but the visual appeal and consistency of character shapes deteriorate
Solution Approach 1:
The patent implements dynamic pixel spacing where the distance between adjacent pixels varies based on their position within the character. Pixels along continuous paths (especially diagonals) have larger spacing to reduce cumulative energy deposition, while pixels at character boundaries or isolated positions have smaller spacing to maintain definition. This dynamic adjustment resolves the contradiction by adapting pixel distribution to local requirements, improving image quality while reducing substrate puncture risk.
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
The scalable font system improves image quality, reduces the risk of substrate puncture, and allows for flexible trade-offs between marking speed and quality without changing fonts, enhancing the usability and reliability of laser marking systems, particularly on thin film packaging.
Implementation Method 1
a laser marking system that employs step-and-repeat, variable dwell time laser printing to mark products
Data Source
Figure 1A~1B
Figure 2~3A
Figure 3B~3C
AI summary
A system directs a laser beam to mark a material with an alphanumeric code. Character and quality information corresponding to a mark to apply to the material with the laser beam can be received, a font definition that specifies character segments can be obtained, a set of multiple spaced locations can be generated from the character segments in accordance with the character and quality information, and the material can be marked with the laser beam by directing the laser beam to dwell at the locations and move between the locations without deactivating the laser beam.