Massive Monolithic LED Arrays for High-Speed Photoreceptive Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high resolution imaging methods on photoreceptive materials are constrained by speed and cost, particularly in manufacturing processes like semiconductor device production and offset printing, where achieving precise and accurate imaging is challenging due to limitations in light source adaptability and imaging mechanism precision.
Innovation Solution
The development of massive monolithic arrays of individually addressable light emitting diodes (LEDs) that can be controlled for intensity and activation timing, combined with a two-axis motion system for precise imaging, allowing for high-speed and cost-effective imaging by adapting the light source to the spectral sensitivity of the substrate and ensuring accurate pixel density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional imaging methods (lens projection or laser scanning) are used to achieve high resolution imaging on photoreceptive materials, then imaging precision can be maintained, but imaging speed is constrained and cost increases
Solution Approach 1:
The imaging system is segmented into multiple independently controllable LED light sources arranged in arrays, allowing parallel illumination of different regions of the photoreceptive material. This segmentation enables simultaneous exposure of multiple areas, dramatically increasing imaging speed while maintaining resolution through individual addressability of each LED element.
Solution Approach 2:
The patent replaces mechanical scanning systems (lasers that physically scan across the substrate) with a static array of individually addressable LED light sources. This substitution eliminates the need for high-precision mechanical movement and scanning mechanisms, enabling faster imaging without compromising precision through electronic control of light source activation patterns.
2Manufacturing precision
If complex expensive mechanisms are used to scan the surface of the substrate to achieve high resolution, then imaging precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the complex mechanical scanning mechanisms from the imaging system. Instead of using moving parts to scan the substrate surface, the invention uses a fixed array of LEDs that can be electronically controlled to illuminate specific regions, removing the need for complex scanning hardware while maintaining imaging precision.
Solution Approach 2:
The patent uses multiple LED light sources that replicate the function of a single scanning light source. Each LED in the array can be individually activated to mimic the position and function of a scanning beam, providing the same imaging precision through parallel static light sources rather than sequential mechanical scanning.
3Adaptability or versatility
If conventional light sources are used for imaging, then simplicity is maintained, but adaptability to spectral sensitivity of different substrates is limited
Solution Approach 1:
The patent implements a universal imaging system using LED arrays that can be adapted to different substrate types and spectral sensitivities. By individually controlling the wavelength and intensity of each LED in the array, the system can be configured for various photoreceptive materials (semiconductor photoresists, printing plates, etc.), providing multi-functionality without requiring separate imaging systems for each application.
Solution Approach 2:
The patent enables dynamic adjustment of light source parameters (wavelength, intensity, duration) for each LED in the array to match the spectral sensitivity characteristics of different photoreceptive substrates. This parameter control allows the same hardware system to be optimized for various materials by changing electrical control parameters rather than physical components.
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
This approach enables high-speed, high-resolution imaging with improved precision and accuracy, enhancing the quality and efficiency of imaging processes in manufacturing applications by allowing for precise control of each LED and movement of the imaging system over the substrate.
Implementation Method 1
massive monolithic arrays of individually addressable light emitting diodes (LEDs)
Implementation Method 2
the photoreceptive material may be exposed in a manner such as to create a desired image that, when additional steps are taken, produces a usable differentiation in the photoreceptive material in the exposed areas and unexposed areas
Data Source
AI summary
Methods and apparatus are provided to fabricate massive monolithic arrays of individually addressable light emitting diodes, assemble a plurality of such massive monolithic arrays of individually addressable light emitting diodes, control each individual light emitting diode, and to assemble the same in manner to achieve the accuracy and stability for a massive number of individually controlled light emitting diodes that can then be focused using projection optics on to a photoreceptive surface. In addition methods and apparatus are provided to move the imaging system thus described relative to the photoreceptive surface in two axes orthogonal to each other thus exposing the photoreceptive surface.