Modular Light Ring for Bioprinter Crosslinking
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Solution Overview
Problem
Conventional light sources used in bioprinting are limited by their single wavelength capability, non-axisymmetric exposure profiles, and lack of modularity, which restricts their application and introduces contamination risks during the crosslinking process of bioinks.
Innovation Solution
A modular light ring system with multiple LEDs arranged in annular rows, each controllable for unique light output characteristics, removably attachable to bioprinter end effectors, allowing for customizable light exposure to match specific bioinks and minimize contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional single-wavelength light sources are used, then the device structure is simple, but the adaptability to different bioinks is limited
Solution Approach 1:
The light source is divided into multiple independent LED elements, each emitting at a different wavelength. These segmented LED elements can be individually selected and activated based on the specific bioink requirements, enabling wavelength customization without requiring a completely different light source system.
Solution Approach 2:
A single modular light ring assembly integrates multiple LED types (UV, blue, green, red) that can address different bioink photoinitiators. This multi-functional design allows the same hardware platform to serve multiple crosslinking applications by simply changing which LED elements are activated, rather than requiring separate devices for each wavelength.
2Manufacturing precision
If conventional mounted light wands are used, then the mounting is simple, but the exposure profile becomes non-axisymmetric
Solution Approach 1:
The light source is configured as a complete annular ring rather than a linear wand, providing 360-degree symmetric illumination around the dispensing tip. This circular geometry ensures uniform exposure distribution in all radial directions, creating an axisymmetric exposure profile that matches the rotational symmetry of typical bioprinting processes.
Solution Approach 2:
Multiple LED elements arranged in concentric annular patterns are merged into a single integrated light ring assembly. This combination of multiple light sources in a unified circular structure achieves both the symmetric exposure profile and modular replaceability, resolving the contradiction between structural simplicity and exposure uniformity.
3Reliability
If conventional non-modular light sources are used, then the device design is straightforward, but contamination risks increase during crosslinking
Solution Approach 1:
The light source system is segmented into modular, independently replaceable light ring assemblies. Each module can be removed and replaced without affecting the rest of the bioprinter system, allowing for easy sterilization, replacement of contaminated components, and maintenance of sterile conditions during crosslinking operations.
Solution Approach 2:
The light ring assembly is extracted as a separate, removable module from the main bioprinter system. This extraction allows the light source to be independently handled for sterilization purposes and replaced if contamination occurs, preventing contamination spread to other system components while maintaining reliable crosslinking functionality.
4Productivity
If single-wavelength LEDs are used, then the light source is simple, but the ability to optimize for specific bioinks is reduced
Solution Approach 1:
Different regions of the annular light ring are assigned different LED types with specific wavelengths optimized for different bioink photoinitiators. This local differentiation allows selection of the optimal wavelength for each specific bioink formulation, maximizing crosslinking efficiency while keeping the overall device architecture relatively simple through selective activation of specific LED segments.
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 efficient and precise crosslinking of bioinks with customizable light wavelengths and intensities, reducing cell viability loss and improving the modularity and cleanliness of the bioprinting process.
Implementation Method 1
A modular light ring system with multiple LEDs arranged in annular rows
Implementation Method 2
One way this crosslinking may be achieved is through a photoinitiatior when irradiated with light
Data Source
AI summary
A modular light for removably attaching to a bio-printer robot end effector, where the light includes: an annular modular light ring housing with an annular opening for receiving the end effector of the bioprinting robot; the housing substantially surrounding a dispensing tip of the end effector; a power supply interface to receive electrical power from the end effector; a plurality of LEDs positioned annularly around the end effector within the annular modular light ring housing, where the plurality of LEDs are spaced in at least two annular rows, where each of the at least two annular rows are at a unique elevational position within the annular modular light ring housing with respect to a light output plane of the annular modular light ring housing; the LEDs are in electrical communication with the power supply interface; and a controller communicatively coupled with the LEDs and the power supply interface.