Three- and two-dimensional images formed by suspended or transitory colorant in a volume

• US 6,644,768 B2
• Filed: 12/04/2000
• Issued: 11/11/2003
• Est. Priority Date: 12/04/2000
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Vega, Ramon, Murcia, Antoni, Borrell, Ramon, Girones, Xavier
• Primary Examiner(s): Nguyen, Judy
• Assistant Examiner(s): Huffman, Julian D.
• Application Number:
  US09/729,549
• Publication Number:
  US 20020067382A1
• Time in Patent Office: 1,072 Days
• Field of Search: 239/690.1, 239/693, 239/695, 239/20, 347/53, 347/52, 347/82, 347/73, 347/2, 347/589, 347/36, 347/6, 347/9, 347/12, 283/86, 283/91, 404/06, 404/07
• US Class Current: 347/12
• CPC Class Codes: B41J 2/01 Ink jet
• CPC Class Codes: G09F 19/125 Stereoscopic displays; 3D displays

Abstract

An arbitrary 3D or 2D shape is formed by construction from colorant in a volume—which may be cylindrical, annular, or of arbitrary cross-section, depending on form of the invention. In some forms, a 2D-extended array of colorant-ejecting nozzles is disposed in a particular linear direction relative to the volume, and a programmed processor controls ejection of colorant from the nozzles to pass through the volume. A 2D colorant-retrieving frame (ideally back-to-back with the array) is disposed in a second linear direction opposite to the one particular direction, from the array, to recover the colorant and thus erase the image—which can then be refreshed, with animation changes if desired, by the writing array. Colorant is moved through the volume by gravity, or by continuous ejection of material from the array and suction at the frame to form a suspending fluid flow—the array moving at equal but opposite velocity so that the image is stationary. The frame is a passive sump for colorant recovery, or has a pump for returning colorant to the array for reuse—in which case the array best ejects colorant of plural properties and the device has filters to separate retrieved colorant by those properties. In some forms, colorant is stroboscopically lighted to display apparent motion of an image element. A force field can be used to control, or help control, colorant position after ejection.

Claims

1. Apparatus for forming an arbitrary three-dimensional shape in a volume, by construction from colorant suspended in the volume;

said apparatus comprising;

disposed substantially in one particular direction relative to the volume, a two-dimensionally extended array of colorant-ejecting nozzles;

a programmed processor for controlling ejection of multiple droplets of colorant from the nozzles for suspension in the volume, forming such suspended arbitrary three-dimensional shape therein; and

a two-dimensional colorant-retrieving frame disposed substantially in a second direction opposite to the one particular direction, from the array, for recovering such suspended multiple droplets.

2. The apparatus of claim 1, further comprising:

means defining such volume between the array and the frame.

3. The apparatus of claim 2, further comprising:

means for providing relative motion of the colorant through the volume from the array to the frame.

4. The apparatus of claim 3, wherein:

the relative-motion providing means comprise orientation of the array and frame respectively above and below the volume;

whereby gravity induces said motion.

5. The apparatus of claim 4, wherein:

the frame is a substantially passive sump for recovering the colorant.

6. The apparatus of claim 4, wherein:

the frame comprises a pump for redirecting the colorant to the array for reuse.

7. The apparatus of claim 3, further comprising:

stroboscopic lighting for illuminating the colorant at successive instants selected to display apparent motion of an element in the image.

8. Apparatus for forming an arbitrary three-dimensional shape in a volume, by construction from colorant disposed in the volume;

said apparatus comprising;

disposed substantially in one particular linear direction relative to the volume, a two-dimensionally extended array of colorant-ejecting nozzles;

a programmed processor for controlling ejection of colorant from the nozzles to pass through the volume, forming such arbitrary three-dimensional shape therein; and

a two-dimensional colorant-retrieving frame disposed substantially in a second linear direction opposite to the one particular direction, from the array;

means defining such volume between the array and the is frame; and

means for providing relative motion of the colorant through the volume from the array to the frame; and

wherein;

the relative-motion providing means comprise orientation of the array and frame respectively above and below the volume;

whereby gravity induces said motion;

the frame is a substantially passive sump for recovering the colorant;

the frame comprises a pump for redirecting the colorant to the array for reuse;

the array ejects colorant of plural characteristics; and

further comprising filters for separating the retrieved colorant by said characteristics.

9. The apparatus of claim 8, wherein the characteristics comprise both:

colors; and

associated physical characteristics for facilitating said separating by the filters.

10. Apparatus for forming an arbitrary three-dimensional image in a volume, by construction from multiple drops of colorant disposed in the volume;

said apparatus comprising;

a two-dimensionally extended array of colorant-ejecting nozzles;

a programmed processor for controlling ejection of multiple droplets of colorant from the nozzles to form such three-dimensional image;

a two-dimensional colorant-retrieving frame disposed in complementary relation to the array for recovering such suspended multiple droplets; and

means for providing relative motion of the suspended colorant from the array to the frame through the volume;

wherein the relative-motion providing means comprise a flow of fluid ejected with the colorant from the array and suspending the colorant in the volume.

11. The apparatus of claim 10, wherein:

the relative-motion providing means further comprise a mounting that supports the array for motion in a direction which, at least at an instant of said ejection, is opposite said flow of fluid, to thereby suspend the colorant in the volume.

12. The apparatus of claim 11, wherein:

the fluid flow with respect to the array and the array motion with respect to the volume are substantially equal in magnitude of velocity but opposite in direction;

whereby such image appears substantially stationary in the volume.

13. The apparatus of claim 12, wherein:

the volume-defining means comprise a substantially cylindrical chamber; and

the mounting comprises means for supporting the array for rotational motion, substantially about a center of the chamber.

14. The apparatus of claim 12, wherein:

the frame is mounted back-to-back with the array, for rotational motion therewith.

15. The apparatus of claim 14, wherein:

the volume-defining means comprise a substantially cylindrical chamber; and

the mounting comprises means for supporting the array for rotational motion, substantially about a center of the chamber.

16. The apparatus of claim 11, further comprising:

means for moving the array in a substantially cylindrical path; and

means for moving the frame in a complementary disposition with the array.

17. The apparatus of claim 11, wherein:

the frame is a substantially passive sump for recovering the colorant.

18. The apparatus of claim 17, wherein:

the frame comprises a pump for redirecting the colorant to the array for reuse.

19. The apparatus of claim 18:

wherein the array ejects colorant of plural characteristics; and

further comprising filters for separating the retrieved colorant by said characteristics.

20. The apparatus of claim 19, wherein the characteristics comprise both:

colors; and

associated physical characteristics for facilitating said separating by the filters.

21. Apparatus for forming an arbitrary three-dimensional shape suspended in a volume, by construction from colorant disposed in the volume;

said apparatus comprising;

a two-dimensionally extended array of colorant-ejecting nozzles;

means for closely defining such volume and for suspending said colorant therein, said defining-and-suspending means comprising an enclosed chamber that closely defines such volume; and

means for controlling ejection of colorant from the nozzles to form such arbitrary suspended shape, said controlling means comprising a programmed processor.

22. The apparatus of claim 21, further comprising:

electrostatic or electromagnetic means for controlling the colorant position in the chamber after ejection.

23. Apparatus for forming an arbitrary two-dimensional image suspended transitorily by construction from multiple droplets of colorant;

said apparatus comprising;

a generally one-dimensional array of colorant-ejecting nozzles;

means for mounting the array to form such suspended a image by sweeping along a path while ejecting said multiple droplets of colorant;

means for controlling ejection of colorant from the nozzles to form such arbitrary image, said controlling means comprising a programmed processor for controlling said ejection; and

means for collecting the colorant that forms such arbitrary image, said collecting means comprising a colorant-retrieving frame, disposed in complementary relation to the array.

24. The apparatus of claim 23, wherein:

the frame is mounted generally back-to-back with and moves with the array.