3D Printer LED Light Control for LCD Illumination Uniformity
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Solution Overview
Problem
The service life of selective light-transmitting displays in three-dimensional printing devices is short due to the absorption of UV light, which affects light consistency and transmittance, leading to reduced printing quality and increased maintenance costs.
Innovation Solution
A method and mechanism for controlling the light source in a three-dimensional printing device by adjusting the driving currents of LED lamp sets to achieve consistent illumination, using a current adjustment mechanism and light detection to ensure uniform light emission, thereby reducing the need for UV light absorption by the selective light-transmitting display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If UV light is used for photocuring 3D printing with LCD, then printing function is achieved, but service life of selective light-transmitting display is reduced
Solution Approach 1:
The patent introduces a wavelength conversion layer as an intermediary between the blue LED light source and the LCD screen. This layer converts part of the blue light (430-470nm) to UV light (380-405nm), reducing the intensity of blue light that would otherwise be absorbed by the LCD, thereby extending its service life while still providing sufficient UV for photocuring
Solution Approach 2:
The patent changes the spectral parameters of the light source by using a wavelength conversion layer that transforms the emission spectrum. The blue LED emits at 430-470nm, and the conversion layer modifies this to include 380-405nm UV components, altering the light characteristics to reduce harmful absorption while maintaining printing functionality
2Illumination intensity
If ordinary LCD with 405nm UV LED is used, then photocuring 3D printing is achieved, but light consistency and transmittance are insufficient
Solution Approach 1:
The patent applies local quality optimization by using a blue LED light source with wavelength conversion rather than uniform 405nm UV LEDs. The wavelength conversion layer creates localized spectral transformation, allowing different regions of the LCD to receive optimized light wavelengths, improving overall light consistency and transmittance
Solution Approach 2:
The patent uses composite material structure combining blue LED chips with wavelength conversion phosphor materials. This composite light source produces a combined spectrum of blue light and converted UV light, achieving superior light consistency and transmittance compared to single-wavelength 405nm UV 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 approach improves light consistency and transmittance, prolongs the service life of the selective light-transmitting display, and enhances printing quality by minimizing UV light absorption, thus reducing maintenance frequency and costs.
Implementation Method 1
the light source comprises a plurality of LED lamp sets
Implementation Method 2
The service life of selective light-transmitting displays in three-dimensional printing devices is short due to the absorption of UV light
Implementation Method 3
to achieve the photocuring 3D printing with LCD
Data Source
AI summary
The present disclosure relates to the technical field of light source control, and provides a three-dimensional printing device and a light source controlling method and mechanism thereof. The three-dimensional printing device comprises a selective light-transmitting display, a light source comprises a plurality of LED lamp sets, and the method for controlling the light source comprises: supplying currents to the plurality of LED lamp sets; obtaining a plurality of first illumination data of light emitted by the LED lamp sets and passing through the selective light-transmitting display; and adjusting a driving current of a corresponding LED lamp set according to a relationship between the plurality of pieces of first illumination data, to make the first illumination data of the plurality of LED lamp sets consistent.