Scalable and fast three dimensional printing system

Patent metadata

Field	Value
Publication number	US-10773510-B2
Application number	US-201715425289-A
Country	US
Kind code	B2
Filing date	Feb 6, 2017
Priority date	Feb 6, 2017
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A three dimensional printing system includes a light engine having a spatial light modulator for curing individual layers of a photocure resin to form a three dimensional article of manufacture. The light engine is configured to: (1) receive a slice image that defines an array of energy values for curing a layer, (2) process the slice image to define an image frame compatible with the spatial light modulator, (3) receive an on signal, (4) activate the first light source in response to the on signal; (5) repeatedly send the first defined image frame to the first spatial light modulator during a defined cure time for the single layer of resin; (6) receive an off signal; (7) deactivate the first light source in response to the off signal; and (8) repeat steps (1)-(7) until the three dimensional article of manufacture is formed.

First claim

What we claim is:

1. A three dimensional printing system which forms a three dimensional article of manufacture through a layer-by-layer process with each layer being formed by the operation of a first light engine selectively curing photocure resin onto a face of the three dimensional article of manufacture comprising:
a vessel for containing the photocure resin;
the first light engine including a first system controller and a first light source that illuminates a first spatial light modulator, the first system controller configured to operate portions of the first light engine to:
(a) receive a first incoming slice energy data array;
(b) process the first incoming slice energy data array to define a first image frame;
(c) receive an on signal;
(d) activate the first light source in response to the on signal;
(e) repeatedly send the first defined image frame to the first spatial light modulator during a defined cure time for a layer of the resin;
(f) receive an off signal;
(g) deactivate the first light source in response to the off signal; and
(h) repeat steps (a)-(g) until the three dimensional article of manufacture is formed.

2. The three dimensional printing system of claim 1 wherein the first spatial light modulator is a digital mirror array which includes at least one million individually controllable mirror elements.

3. The three dimensional printing system of claim 1 wherein the defined image frame includes a binary sequence of bit planes having a varying time duration.

4. The three dimensional printing system of claim 1 wherein (b) includes processing the array of energy values to provide one or more of correction, calibration, scaling, and stitching.

5. The three dimensional printing system of claim 1 wherein the first light source is activated simultaneously with a temporal leading edge of one of the defined image frames.

6. The three dimensional printing system of claim 1 wherein an integer number of the defined image frames are received by the first spatial light modulator between the activation and the deactivation of the first light source.

7. The three dimensional printing system of claim 1 wherein a non-integer number of the defined image frames are received by the first spatial light modulator between the activation and the deactivation of the first light source.

8. The three dimensional printing system of claim 1 further comprising:
a second light engine including a second system controller and a second light source that illuminates a second spatial light modulator, the second system controller configured to operate portions of the second light engine to:
(a) receive a second incoming slice energy data array, the second incoming slice energy data array is complementary with the first incoming slice energy data array to allow the first and second light engines to have different but partially overlapping build fields;
(b) process the incoming slice energy data array to define a second image frame;
(c) receive the on signal from the first light engine;
(d) activate the second light source in response to the on signal;
(e) repeatedly send the second defined image frame to the second spatial light modulator during the defined cure time for the layer of the resin;
(f) receive the off signal from the first light engine;
(g) deactivate the second light source in response to the off signal; and
(h) repeat steps (a)-(h) until the three dimensional article of manufacture is formed.

9. The three dimensional printing system of claim 1 wherein the first system controller sends the incoming slice energy data array along a first data path to a digital mirror device module and sends the on and off signals along a second data path to a first light source module.

10. A three dimensional printing system which forms a three dimensional article of manufacture through a layer-by-layer process with each layer being formed by selectively curing photocure resin onto a face of the three dimensional article of manufacture comprising:
a vessel for containing the photocure resin;
a plurality of light engines including a master light engine and at least one subsidiary light engine, the master light engine including:
a system processor configured to:
(a) receive an incoming slice energy data array specific to the master light engine;
(b) receive light source switching signals;
(c) route the incoming slice energy data array specific to a digital mirror device module that is within the master light engine;
(d) apply the switching signals to a light source module that is within the master light engine; and
(e) route the switching signals to the at least one subsidiary light engine.

11. The three dimensional printing system of claim 10 wherein the digital mirror device module includes an image scaler, a digital mirror device formatter, and a digital mirror device.

12. The three dimensional printing system of claim 11 wherein the image scaler processes the incoming slice energy data array to define a scaled energy data array and the digital mirror device formatter processes the scaled energy data array to define an image frame and to repeatedly send the image frame to the digital mirror device.

13. The three dimensional printing system of claim 12 wherein the switching signals includes an on signal and an off signal, an integer number of the image frames are sent to the digital mirror device during a time duration between the on signal and the off signal.

14. The three dimensional printing system of claim 12 wherein the switching signals includes an on signal and an off signal, a non-integer number of the image frames are sent to the digital mirror device during a time duration between the on signal and the off signal.

Assignees

• 3D Systems Inc

Inventors

• Wynne Ben
• Mueller Robert

Classifications

• B29C64/386 Primary

  Data acquisition or data processing for additive manufacturing · CPC title

• B33Y30/00 Primary

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B33Y50/02 Primary

  for controlling or regulating additive manufacturing processes · CPC title

• B29C64/135

  the energy source being concentrated, e.g. scanning lasers or focused light sources · CPC title

• B29C64/277

  using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED] · CPC title