3d printing device and imaging system thereof

Patent metadata

Field	Value
Publication number	US-2017151717-A1
Application number	US-201515122388-A
Country	US
Kind code	A1
Filing date	Sep 17, 2015
Priority date	May 15, 2015
Publication date	Jun 1, 2017
Grant date	—

Abstract

Embodiments of the invention provide a 3D printing device and an imaging system thereof. The imaging system comprises a display panel having a plurality of pixels, a storage apparatus for storing a liquid light curable material, and a control component for controlling the display panel to performing imaging. The display panel is an active light emitting panel. The imaging system does not need a polarizer, so as to avoid the polarizer from absorbing the light emitted by the light source system. On the other hand, because there is not backlight, and the image projection is formed by directly using the light emitted by the display panel, the light path is shortened and the optical loss is reduced, consequently, the utilization ratio of light is improved and the power consumption of the whole system is reduced.

First claim

1 . An imaging system for a 3D printing device, the imaging system comprising:
a display panel comprising a plurality of pixels; a storage apparatus arranged in a light path of the display panel for storing a liquid light curable material, and a control component for controlling the display panel to perform imaging, wherein the display panel performs imaging on an interface of the light curable material, so as to enable the light curable material to be cured at the interface to form a pattern, and the display panel is an active light emitting panel.

2 . The imaging system according to claim 1 , wherein the imaging system further comprises a microlens array, which is arranged in the light path between the display panel and the storage apparatus for adjusting the light path.

3 . The imaging system according to claim 2 , wherein the microlens array comprises a plurality of microlenses arranged on a light emitting surface of the display panel,
wherein a side of the microlens away from the display panel is a convex surface, and a projection of a center of any of the microlenses and a projection of a center of a corresponding pixel coincide on the display panel.

4 . The imaging system according to claim 3 , wherein a focal plane of the microlens and the interface where the light curable material is cured are in a same plane.

5 . The imaging system according to claim 1 4 , wherein the display panel further comprises a light blocking matrix, which is arranged at a position on the light emitting surface of the display panel corresponding to a non-pixel area.

6 . The imaging system according to claim 5 , wherein a thickness of the light blocking matrix is 1 to 3 times of a thickness of the pixel.

7 . The imaging system according to claim 1 , wherein the display panel comprises a light emitting diode display panel, the light emitting diode display panel contains a plurality of pixels consisting of light emitting diode units.

8 . The imaging system according to claim 7 , wherein a spectrum range of the light emitting diode unit is 400 nm to 420 nm.

9 . The imaging system according to claim 7 , wherein a light emitting material of the light emitting diode comprises gallium nitride or aluminum nitride.

10 . The imaging system according to claim 1 , wherein the display panel comprises an organic light emitting diode display panel.

11 . The imaging system according to claim 10 , wherein a characteristic of a light emitting layer material of the organic light emitting diode meets a condition of ΔE=2.79˜3.14,
wherein ΔE is an energy level difference of a ground state and an excited state of the light emitting layer material of the organic light emitting diode.

12 . The imaging system according to claim 1 , wherein the display panel comprises a plasma display panel.

13 . The imaging system according to claim 1 , wherein the control component controls the display panel to perform imaging such that the pixels thereof are only in an open state or a closed state.

14 . A 3D printing device comprising an imaging system, the imaging system comprising:
a display panel comprising a plurality of pixels; a storage apparatus arranged in a light path of the display panel for storing a liquid light curable material; and a control component for controlling the display panel to perform imaging, wherein the display panel performs imaging on an interface of the light curable material, so as to enable the light curable material to be cured at the interface to form a pattern, and the display panel is an active light emitting panel.

15 . The imaging system according to claim 2 , wherein the display panel further comprises a light blocking matrix, which is arranged at a position on the light emitting surface of the display panel corresponding to a non-pixel area.

16 . The imaging system according to claim 3 , wherein the display panel further comprises a light blocking matrix, which is arranged at a position on the light emitting surface of the display panel corresponding to a non-pixel area.

17 . The imaging system according to claim 4 , wherein the display panel further comprises a light blocking matrix, which is arranged at a position on the light emitting surface of the display panel corresponding to a non-pixel area.

18 . The 3D printing device according to claim 14 , wherein the imaging system further comprises a microlens array, which is arranged in the light path between the display panel and the storage apparatus for adjusting the light path.

19 . The 3D printing device according to claim 18 , wherein the microlens array comprises a plurality of microlenses arranged on a light emitting surface of the display panel,
wherein a side of the microlens away from the display panel is a convex surface, and a projection of a center of any of the microlenses and a projection of a center of a corresponding pixel coincide on the display panel.

20 . The 3D printing device according to claim 19 , wherein a focal plane of the microlens and the interface where the light curable material is cured are in a same plane.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Wenbo

Classifications

• B22F12/42

  Light-emitting diodes [LED] · CPC title

• B29C35/0805

  using electromagnetic radiation · CPC title

• B22F10/12

  by photopolymerisation, e.g. stereolithography [SLA] or digital light processing [DLP] · CPC title

• B22F12/20

  Cooling means · CPC title

• B22F12/44

  characterised by the configuration of the radiation means · CPC title