System and method of fluid delivery

A method for providing a repeating surface fluid pattern comprising an array of pixels made of at least a first fluid, a second fluid, a third fluid, and a fourth fluid, the method executed by a processor of a computer system controlling a fluid delivery system including a fluid delivery device having a plurality of surface openings, and a pump system for modulating flow of the at least four different fluids to and from the plurality of surface openings, the method comprising:

• generating a first pixel of the array of pixels by causing injection of the first fluid through at least a first surface opening of the plurality of surface openings and by causing aspiration of the first fluid through at least a second, third, and fourth surface opening of the plurality of surface openings, wherein the injection and aspiration are performed simultaneously;
• generating a second pixel by causing injection of a second fluid through at least a fifth surface opening of the plurality of surface openings and by causing aspiration of the second fluid through at least the second and third surface openings of the plurality of surface openings, wherein the second pixel is in a same row and different column of the array as the first pixel;
• generating a third pixel by causing injection of the third fluid through at least a sixth opening of the plurality of surface openings and by causing aspiration of the third fluid through at least the third surface opening, wherein the third pixel is in a different row and a different column of the array as the first pixel;
• and
• generating a fourth pixel by causing injection of the fourth fluid through at least a seventh opening of the plurality of surface openings and by causing aspiration of the fourth fluid through at least the third and fourth surface openings, wherein the fourth pixel is in a different row and same column of the array as the first pixel, wherein each of the first pixel, second pixel, third pixel, and fourth pixel are individually hydrodynamically confined, and wherein a respective edge of each of the first pixel, second pixel, third pixel, and fourth pixel is in direct contact with a respective edge of another pixel in the array of pixels.

A method for providing a repeating surface fluid pattern comprising an array of pixels made of at least two different fluids, the method executed by a processor of a computer system controlling a fluid delivery system including a fluid delivery device having a plurality of surface openings, and a pump system for modulating flow of the at least two different fluids to and from the plurality of surface openings, the method comprising:

• generating a first pixel of the array of pixels by causing injection of a first fluid of the at least two different fluids through at least a first surface opening of the plurality of surface openings and by causing aspiration of the first fluid and a second fluid of the at least two different fluids through at least a second, third, and fourth surface opening of the plurality of surface openings, wherein the injection and aspiration are performed simultaneously;
• generating a second pixel by causing injection of the first fluid of the at least two different fluids through at least a fifth surface opening of the plurality of surface openings and via aspiration of the first fluid through at least the second and third surface openings of the plurality of surface openings, wherein the second pixel is in a same row and different column of the array as the first pixel;
• generating a third pixel by causing injection of the second fluid through at least a sixth opening of the plurality of surface openings and via aspiration of the second fluid through at least the third surface opening, wherein the third pixel is in a different row and a different column of the array as the first pixel;
• and
• generating a fourth pixel by causing injection of the second fluid through at least a seventh opening of the plurality of surface openings and via aspiration of the second fluid through at least the third and fourth surface openings, wherein the fourth pixel is in a different row and same column of the array as the first pixel, wherein each of the first pixel, second pixel, third pixel, and fourth pixel are individually hydrodynamically confined, and wherein every edge of the first pixel, second pixel, third pixel, and fourth pixel is directly adjacent to an edge of another pixel in the array of pixels.