3D Printer Quantum Dot LED Exposure Matrix
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 3D printing technologies, such as stereolithography and digital light processing, face inefficiencies in curing larger areas due to time-consuming beam deflection and potential distortions, and 3D printers with LCD displays suffer from heat-related malfunctions.
Innovation Solution
A 3D printer utilizing a two-dimensional matrix of individually controllable quantum dot light-emitting diodes as an exposure element, arranged parallel to a flat mounting plate, with adjustable distance, reducing heat generation and enabling faster, more precise curing without beam deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a focused laser beam is deflected by a swiveling mirror to scan and cure resin point by point, then curing can be achieved, but the process becomes time-consuming and large areas take excessive time to cure
Solution Approach 1:
The exposure element is divided into a two-dimensional matrix of closely adjacent individually controllable light-emitting elements, allowing parallel curing of multiple points simultaneously across the entire resin surface, transforming sequential point-by-point curing into parallel area-based curing
Solution Approach 2:
The exposure approach transitions from one-dimensional linear scanning (laser beam moving across the resin surface) to two-dimensional matrix illumination (array of light-emitting elements covering the resin surface), enabling simultaneous exposure of multiple points across the entire area
2Manufacturing precision
If a swiveling mirror is used to deflect and direct the laser beam, then selective curing can be achieved, but the device requires a large amount of space
Solution Approach 1:
The complex beam deflection mechanism (swiveling mirror and associated actuators) is completely removed from the system, replacing it with a fixed two-dimensional matrix of light-emitting elements that directly illuminate the resin without requiring mechanical beam steering
Solution Approach 2:
The mechanical beam deflection system (mirrors, actuators, and moving components) is replaced with a static optical system using a two-dimensional array of light-emitting diodes, eliminating mechanical complexity while maintaining selective curing capability
3Manufacturing precision
If an LCD display backlit by a surface light source is used to cure resin, then selective curing can be achieved, but the LCD display heats up and may malfunction
Solution Approach 1:
The patent uses light-emitting diodes (LEDs) instead of LCD displays, effectively replacing a complex, heat-prone component with simpler, more reliable light-emitting elements that generate minimal heat and are less prone to thermal malfunction
Solution Approach 2:
The system changes the fundamental operating parameters by using electrically excited light-emitting diodes instead of optically illuminated LCD pixels, fundamentally altering how the exposure element generates light and thereby eliminating the heat generation problem inherent in backlit LCD displays
4Manufacturing precision
If light sources are positioned close to the resin to improve resolution, then curing precision improves, but heat-related problems worsen
Solution Approach 1:
The patent changes the fundamental characteristics of the light-emitting elements by using quantum dot light-emitting diodes with specific emission wavelengths that match the resin's absorption spectrum, enabling effective curing at close distances with minimal heat generation due to the high efficiency and narrow emission bands of quantum dot LEDs
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 solution allows for a compact 3D printer with improved printing speed and resolution, reducing heat-related issues and maintaining print quality over time, while ensuring effective curing of resin across larger areas with minimal distortion.
Implementation Method 1
the exposure element is a two-dimensional matrix of closely adjacent, individually controllable quantum dot light-emitting diodes
Implementation Method 2
quantum dot light-emitting diodes
Implementation Method 3
a suitable liquid resin or monomer formulation is cured point by point by targeted exposure
Data Source
Figure 1
AI summary
The application relates to a 3D printer (1) comprising a flat base panel (4) and an exposure element (10) which is arranged opposite and parallel to the base panel (4), the distance between the base panel (4) and the exposure element (10) being adjustable with the aid of a drive unit (6), and the base panel (4) and/or the exposure element (10) being arranged in a reservoir (3) filled with resin (2) such that the region bordering the base panel (4) between the base panel (4) and the exposure element (10) is occupied by the resin (2) in the reservoir (3). According to the invention, the exposure element (10) is formed as a two-dimensional matrix of quantum dot light-emitting diodes (11) which are situated closely next to one another and can be activated individually.