Scalable and fast three dimensional printing system

Patent metadata

Field	Value
Publication number	US-11584085-B2
Application number	US-202017019600-A
Country	US
Kind code	B2
Filing date	Sep 14, 2020
Priority date	Feb 6, 2017
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

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 method of manufacturing a three dimensional article comprising:
providing a three dimensional printing system including:
a vessel containing photocure resin; and
a light engine including a controller and a light source that illuminates a spatial light modulator, the controller is configured to operate portions of the light engine; and

fabricating the three dimensional article by forming a sequence of selectively hardened layers of the photocure resin, the sequence of selectively hardened layers of photocure resin are individually formed by operating the three dimensional printing system including the following steps for an individual one of the sequence of selectively hardened layers:
processing an incoming slice energy data array to provide a defined image frame;
activating the light source to provide the light source in an ON state;
concurrent with the light source being in the ON state, repeatedly sending the defined image frame to the spatial light modulator; and

deactivate the light source to an OFF state.

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

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

4. The method of claim 1 wherein operating the three dimensional printer further includes receiving the incoming slice energy data array and processing the incoming slice energy data array.

5. The method of claim 1 wherein activating the light source occurs before repeatedly sending the defined image frame to the light modulator.

6. The method of claim 1 wherein activating the light source occurs while repeatedly sending the defined image frame to the light modulator.

7. The method of claim 1 wherein repeatedly sending the defined image frame consists of sending an integer number of the defined image frame image to the light modulator during a time period between the ON state and the OFF state of the light source.

8. The method of claim 1 wherein repeatedly sending the defined image frame consists of sending a non-integer number of the defined image frame to the light modulator during a time period between the ON state and the OFF state of the light source.

9. A method of manufacturing a three dimensional article comprising:
providing a three dimensional printing system including:
a vessel for containing a photocure resin;
a light engine including:
a system processor;
digital mirror device module including a digital mirror device; and
a light source module including a light source for illuminating the digital mirror device; and

fabricating the three dimensional article by forming a sequence of selectively hardened layers of the photocure resin, the sequence of selectively hardened layers of the photocure resin are individually formed by operating the three dimensional printing system including:
receiving and delivering an ON switching signal along a second data path from the system processor to the light source module to place the light source in an ON state;
concurrently with the light source being in the ON state, repeatedly delivering a defined image frame to the digital mirror device along a first data path; and
receiving and delivering an OFF signal along the second data path from the system processor to the light source module to place the light source in an OFF state.

10. The method of claim 9 wherein the spatial light modulator is a digital mirror array which includes at least one million individually controllable mirror elements.

11. The method of claim 9 wherein the defined image frame includes a binary sequence of bit planes having a varying time duration.

12. The method of claim 9 wherein operating the three dimensional printer further includes receiving an incoming slice energy data array and processing the incoming slice energy data array to define the defined image frame.

13. The method of claim 12 wherein the light engine includes a digital mirror device module containing a digital mirror device formatter and the digital mirror device.

14. The method of claim 13 wherein the digital mirror device formatter receives the incoming slice energy data array and then repeatedly generates the defined image frame.

15. The method of claim 9 wherein an integer number of the defined image frame is sent to the light modulator during a time period between the ON state and the OFF state of the light source.

16. The method of claim 9 wherein a non-integer number of the defined image frame is sent to the light modulator during a time period between the ON state and the OFF state of the light source.

17. A method of manufacturing a three dimensional article comprising:
providing a three dimensional printing system including:
a vessel for containing photocure resin;
a first light engine including a first system processor and a first light source that illuminates a first spatial light modulator, the first light engine configured to illuminate a first build field within the vessel;
a second light engine including a second system processor and a second light source that illuminates a second spatial light modulator, the second light engine configured to illuminate a second build field within the vessel, the first build field and the second build field partly but do not completely overlap;
fabricating the three dimensional article by forming a sequence of layers, an individual layer of the sequence of layers formed by operating the three dimensional printing system including:
activating the first and second light sources to provide both the first and second light sources in an ON state;
concurrent with the ON state of both the first and second light sources, repeatedly sending a first defined image frame to the first spatial light modulator and repeatedly sending a second defined image frame to the second spatial light modulator; and
deactivating the first and second light sources to an OFF state.

18. The method of claim 17 wherein the first spatial light modulator is a digital mirror array which includes at least one million individually controllable mirror elements.

19. The method of claim 17 wherein an integer number of each of the first defined image frame and the second defined image frame are sent to the first light modulator and the second light modulator respectively during a time period between the ON state and the OFF state of the first and second light sources.

20. The method of claim 17 wherein a non-integer number of each of the first defined image frame and the second defined image frame image frames are sent to first light modulator and the second light modulator respectively during a time period between the ON state and the OFF state of the first and second light sources.

Assignees

• 3D Systems Inc

Inventors

• Wynne Ben
• Mueller Robert

Classifications

• B33Y50/00

  Data acquisition or data processing for additive manufacturing · CPC title

• B33Y30/00 Primary

  Apparatus for additive manufacturing; Details thereof or accessories therefor · 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

• B29K2105/0058

  Liquid or visquous · CPC title