| US 7,588,320 B2 | ||
| Droplet ejection device and method using electrostatic field | ||
| Suk-Han Lee, Suwon-si (Korea, Republic of); Han-Seo Ko, Suwon-si (Korea, Republic of); Do-Young Byun, Seoul (Korea, Republic of); Sang-Joon Han, Suwon-si (Korea, Republic of); Yong-Jae Kim, Suwon-si (Korea, Republic of); Sang-Uk Son, Suwon-si (Korea, Republic of); Jung-Taek Oh, Suwon-si (Japan); and Ji-Hye Yang, Seoul (Korea, Republic of) | ||
| Assigned to In-G Co., Ltd., Suwon (Korea, Republic of) | ||
| Filed on Oct. 28, 2005, as Appl. No. 11/260,689. | ||
| Prior Publication US 2007/0097177 A1, May 03, 2007 | ||
| Int. Cl. B41J 2/06 (2006.01) | ||
| U.S. Cl. 347—55 [347/63; 347/54; 347/9] | 4 Claims |
| 1. A method of ejecting ink using an electrostatic field, the method comprising:
applying substantially simultaneously at least two different voltage levels from each of at least two separate power sources
to each of at least two different electrode layers respectively that surround at least a part of the circumference of a nozzle,
wherein a magnitude of the applied voltage levels supplied to each of the at least two electrode layers increases toward a
discharge port of the nozzle, and
wherein an insulating layer surrounding at least a part of the circumference of the nozzle is provided between each of the
at least two electrode layers, the insulating layer substantially filling the volume between each of the at least two electrode
layers;
supplying ink or ink containing particles to the nozzle;
forming a single ink droplet; and
ejecting the single ink droplet through the discharge port of the nozzle.
|