DLP / LCD — projector-based resin 3D printing
DLP (Digital Light Processing) is a resin printing technology that cures resin a whole layer at a time using a projector or an LCD light source instead of a laser.
How it works
The light source projects an image of a layer onto the resin surface all at once and solidifies the entire layer in a single exposure. The platform rises, fresh resin flows in and the next layer is cured. Time per layer is independent of the number of parts on the layer.
Key properties
- Layer time is constant because the layer is cured in one exposure.
- Screen resolution determines detail (e.g. 4K/8K).
- High surface quality; pixel lines may be visible.
- Washing and UV curing are required.
- Common and accessible among desktop resin printers.
Use cases
- Miniature and figure production
- Jewellery and models
- Dental laboratory applications
- Fast detailed prototyping
Compatible materials
Frequently asked questions
Is DLP faster than SLA?
Because DLP/LCD cures the whole layer in one exposure, it can be faster, especially when the build plate is largely full; SLA scans point by point with a laser.
What determines detail in DLP printing?
The resolution of the light source (e.g. a 4K/8K screen) and the pixel size; on small parts the X/Y resolution is decisive.
Are DLP and LCD the same?
They work on a similar principle; DLP uses a digital micromirror device (DMD) projector, while LCD printers use a high-resolution screen as a mask.