Multi-cell DLP Printer Using Light-Magnetic Field Coupling
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Solution Overview
Problem
Conventional multi-cell digital light processing printing faces challenges with low material changing efficiency, cross-contamination, and poor biological activity in multi-vat material changing, as well as the inability to directly control cells magnetically and coordinate material changing and printing processes effectively.
Innovation Solution
A multi-cell digital light processing printing system utilizing 'light field-magnetic field' coupling, where cells are prepared in magnetic microspheres, allowing magnetic field assistance to control their movement, enabling parallel material changing and printing processes in a single vat, reducing cross-contamination and improving printing efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual material changing or multi-vat material changing is used in conventional DLP printing, then multi-material printing capability is achieved, but material changing efficiency is low and cross-contamination occurs
Solution Approach 1:
The patent merges multiple materials into a single vat by suspending different types of magnetic microspheres (each carrying different cells) in the same bio-ink medium. The magnetic field can selectively aggregate or disperse specific microsphere types, enabling multi-material printing capability while eliminating the need for multiple vats and manual material changing operations, thus improving material changing efficiency and eliminating cross-contamination.
Solution Approach 2:
The patent introduces magnetic field as an intermediary control mechanism to manage material switching. By equipping different microspheres with different magnetic properties (different magnetic contents), the magnetic field acts as a mediator that can selectively manipulate specific microsphere populations without physical contact, enabling efficient and contamination-free material changing.
2Adaptability or versatility
If multi-vat material changing is used, then different materials can be stored separately, but cross-contamination and poor biological activity occur
Solution Approach 1:
The magnetic field serves as a non-contact intermediary that enables selective manipulation of different microsphere types within a single shared medium. This eliminates the harmful interface between multiple vats while maintaining the ability to keep different materials distinct through magnetic property differentiation, thereby preserving biological activity.
Solution Approach 2:
The single vat containing bio-ink with suspended magnetic microspheres creates a unified, controlled environment that eliminates the cross-contamination risks associated with multiple vats. The magnetic microspheres remain dormant and separated until magnetically activated, maintaining a clean and biologically friendly environment throughout the printing process.
3Productivity
If magnetic field assistance is introduced to control microsphere movement, then printing efficiency is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical material changing systems (manual or automated multi-vat switching mechanisms) with a magnetic field-based control system. This substitution eliminates complex mechanical structures for material handling while introducing electromagnetic components (magnet arrays or electromagnets) that provide precise, contactless control of microsphere positioning and aggregation, ultimately simplifying the overall system architecture.
4Ease of operation
If cells are prepared in magnetic microspheres, then non-contact material changing is achieved, but new equipment requirements are introduced
Solution Approach 1:
The patent replaces mechanical handling and contact-based material changing with magnetic field-based manipulation. Cells encapsulated in magnetic microspheres respond to magnetic field gradients and forces, enabling non-contact positioning, aggregation, and dispensing. This substitution introduces electromagnetic equipment but eliminates complex mechanical material transfer mechanisms, improving ease of operation.
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 achieves high accuracy, high efficiency, and high cell activity in biomanufacturing by using cell microspheres as printing units, allowing arbitrary distribution of cells in 3D space and reducing cross-contamination, thereby enabling the simultaneous construction of multi-cell tissues with improved printing speed and accuracy.
Implementation Method 1
the magnetic field generating device is used to generate a magnetic field to control aggregation and dispersion of corresponding magnetic microspheres carrying different cells
Implementation Method 2
the attraction of the magnetic field to the magnetic particles is used to control the movement of the cell-containing magnetic microspheres
Implementation Method 3
the light curing device is used to control bio ink containing the target cells to solidify and form at the target printing position
Data Source
AI summary
The invention discloses a multi-cell digital light processing printer and method controlled by “light field-magnetic field” coupling. The invention couples a magnetic field generating device and a light curing device, and uses the magnetic field to control the material changing of microspheres carrying different cells and different magnetic contents in the vat, so that the material changing process and the printing process are in parallel, and the printing efficiency is improved; at the same time, a single vat is used for non-contact material changing, which reduces cross-contamination and can produce multi-cell biological structures with “high accuracy, high efficiency, and high cell activity”.