Transmissive Liquid Crystal Panel with Quantum Dot Layer for 3D Printing
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Solution Overview
Problem
Existing 3D printers have high costs and low near ultraviolet light transmittance, which limits the efficiency of liquid crystal displays in 3D printing processes.
Innovation Solution
A transmissive liquid crystal panel with a monochromatic quantum dot layer that generates light in the range of 385 nm-420 nm when excited by near ultraviolet light, improving light transmittance and utilization in 3D printing, replacing the conventional chromatic filter layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional liquid crystal display panel with chromatic filter layer is used in 3D printing, then the display function is achieved, but the near ultraviolet light transmittance is low and the cost is high
Solution Approach 1:
The patent changes the optical parameters of the liquid crystal panel by replacing the chromatic filter layer with a monochromatic quantum dot layer that emits at 385-420nm wavelength range. This parameter change enables high near-ultraviolet light transmittance (greater than 90%) while maintaining the display function, directly resolving the contradiction between display performance and UV light transmission efficiency
Solution Approach 2:
The patent adopts a cost-effective quantum dot layer structure that can be integrated into existing liquid crystal panel manufacturing processes. By using monochromatic quantum dots with specific size control (2-5nm) rather than expensive complex chromatic filters, the solution reduces manufacturing cost while achieving superior near-ultraviolet light transmission for 3D printing applications
2Productivity
If a liquid crystal display panel is used in 3D printing, then the patterning function is achieved, but the photographic efficiency of photosensitive resin is low due to high dark-state transmittance
Solution Approach 1:
The patent applies local quality enhancement by using a monochromatic quantum dot layer that provides uniform, single-wavelength emission (385-420nm) across the display area. This localized monochromatic light source ensures consistent photopolymerization efficiency throughout the printing field, eliminating the wavelength variability that reduces photographic efficiency in conventional displays
Solution Approach 2:
The patent utilizes the liquid crystal panel's inherent periodic switching capability to control light transmission in precise cycles during 3D printing. The panel alternates between high-transmission states (for pattern formation) and low-transmission dark states (for pattern definition), with the monochromatic quantum dot layer ensuring that each transmission cycle delivers optimal 385-420nm wavelength light for photosensitive resin curing, thereby improving both printing speed and photographic efficiency
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
Enhances the photographic efficiency of photosensitive resin and printing speed by improving near-ultraviolet light utilization, reducing waste and increasing the quality of printed patterns while lowering the cost of 3D printing.
Implementation Method 1
a monochromatic quantum dot layer covering the aperture areas, the monochromatic quantum dot layer being excitable under near ultraviolet light to generate light having a wavelength in a range of 385 nm-420 nm
Implementation Method 2
a liquid crystal layer located between the first substrate and the second substrate
Data Source
AI summary
Transmissive liquid crystal panel and 3D printer including the same, the panel includes: a first substrate including a plurality of data lines and scan lines, data lines intersecting with scan lines to define a plurality of pixels; a second substrate; a liquid crystal layer located between the first and second substrate; a black matrix defining a plurality of aperture areas corresponding to the pixels; a monochromatic quantum dot layer covering the aperture areas, the monochromatic quantum dot layer being excitable under near ultraviolet light to generate light having a wavelength in a range of 385 nm-420 nm. The panel does not use chromatic filter layer, which improves transmittance of the panel with respect to near ultraviolet light, when the panel is applied in 3D printer, photographic efficiency of photosensitive resin and printing speed are improved, and utilization of near-ultraviolet light emitted by the backlight source is improved.