Variable Intensity Light Exposure for Flat-Top Printing Plate Features
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Solution Overview
Problem
Current methods for producing digital printing plates struggle to create flat-top features, as they often result in rounded surfaces due to the difficulty in controlling the shape of three-dimensional printing features like halftone dots during the curing process, especially when using digital processes.
Innovation Solution
An apparatus and method that utilize a light exposure unit capable of generating multiple illumination intensities and a drive mechanism to control the relative motion between the light source and the printing plate, allowing for the production of either flat-top or round-top features by adjusting the illumination intensity during the curing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital process is used to produce printing plates, then productivity and ease of operation are improved, but manufacturing precision of flat-top features deteriorates
Solution Approach 1:
The patent applies dynamics by making the illumination intensity variable during the curing process. The system transitions from a static single-intensity light source to a dynamic multi-intensity system that can adjust illumination levels in real-time. This is achieved through multiple light sources with different intensities or a single light source with variable intensity control, allowing the operator to switch between intensities to produce either flat-top or round-top features while maintaining digital process efficiency.
Solution Approach 2:
The patent implements parameter changes by varying the illumination intensity parameter during curing. Different illumination intensities produce different curing depths and rates, which directly control the shape of the printed features. By changing this physical parameter (light intensity) during the process, the system can switch between producing flat-top features (higher intensity) and round-top features (lower intensity), thereby achieving precision control over feature geometry while maintaining digital process productivity.
2Device complexity
If single illumination intensity is used during curing, then device complexity is reduced, but adaptability to produce different feature shapes deteriorates
Solution Approach 1:
The system transitions from a static single-intensity configuration to a dynamic multi-intensity system. This is achieved through multiple light sources (e.g., first and second light sources with different intensities) or a single light source with variable intensity control capability. The dynamic adjustment of illumination intensity allows the same device to adapt and produce different feature shapes (flat-top or round-top) without requiring complex mechanical changes, thus maintaining relatively simple device structure while achieving high versatility.
Solution Approach 2:
The patent achieves universality by designing a light exposure system that can perform multiple functions using the same basic apparatus. The system can produce both flat-top features and round-top features by simply adjusting the illumination intensity parameter, eliminating the need for different specialized equipment. This multi-functionality is achieved through multiple light sources or variable intensity control, allowing one device to serve multiple purposes and produce different feature geometries as needed.
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
Enables the operator to choose between flat-top and round-top features on digital printing plates using the same digital workflow equipment, improving the precision and versatility of digital printing by effectively controlling the shape of three-dimensional printing features.
Implementation Method 1
Photo-curable means curable by photons, e.g., light, e.g., light in the ultraviolet range or some other range. The apparatus comprises a light exposure unit including a light source to produce light energy at a wavelength or wavelengths suitable for curing the photo-curable material
Data Source
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AI summary
An aspect relates to the use of an apparatus for curing a printing plate made of or having a photo-curable material, the apparatus comprising a light exposure unit including a light source to produce light energy at a wavelength or wavelengths suitable for curing the photo-curable material, the light exposure unit being capable of generating at least two different illumination intensities, wherein the illumination intensity of the light exposure unit is controlled to control a top shape of three-dimensional printing features on the printing plate.