Method of measuring volumes of ink droplets and method of controlling nozzles of inkjet head using the method
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsWou-sik Kim, Byung-hun Kim, Sang-il Kim
Life of this patent
Estimating the term…
Abstract
A method of measuring the volumes of ink droplets is provided that includes repeatedly forming print patterns each including a plurality of ink droplets ejected from the inkjet head, photographing ink droplets which correspond to each other in terms of ejection order among the ink droplets of the repeatedly formed print patterns and measuring the volumes of the photographed ink droplets.
Claims25
A method of measuring volumes of ink droplets ejected from an inkjet head, the method comprising:
- repeatedly forming print patterns each including a plurality of ink droplets ejected from the inkjet head;
- photographing ink droplets which correspond to each other in terms of an ejection order among the ink droplets of the repeatedly formed print patterns;
- and
- measuring the volumes of the photographed ink droplets.
A method of controlling nozzles of an inkjet head, the method comprising:
- repeatedly forming print patterns each including a plurality of ink droplets ejected from the nozzles of the inkjet head;
- photographing only ink droplets which correspond to each other in terms of an ejection order among ink droplets constituting the print patterns;
- measuring the volumes of the photographed ink droplets;
- and
- determining driving waveforms of the nozzles corresponding to the print patterns using the measured volumes.
A method of measuring uniformity of ink droplets corresponding to an inkjet printhead having a plurality of nozzles, the method comprising:
- forming a first print pattern by a respective nozzle of the inkjet printhead discharging a first sequence of ink droplets;
- forming a second print pattern substantially similar to the first print pattern by the respective nozzle of the inkjet printhead discharging a second sequence of ink droplets;
- comparing each ink droplet of the first sequence with a corresponding ink droplet of the second sequence;
- and
- measuring a volume for each of the compared ink droplets of the first sequence and the second sequence.
A computer-readable recording medium having embodied thereon a computer program to execute a method, wherein the method comprises:
- forming a first print pattern by a respective nozzle of the inkjet printhead discharging a first sequence of ink droplets;
- forming a second print pattern substantially similar to the first print pattern by the respective nozzle of the inkjet printhead discharging a second sequence of ink droplets;
- comparing each ink droplet of the first sequence with a corresponding ink droplet of the second sequence;
- and
- measuring a volume for each of the compared ink droplets of the first sequence and the second sequence.
An inkjet printing system, comprising:
- an inkjet printhead having a plurality of nozzles to form a first print pattern by discharging a first sequence of ink droplets, and to form a second print pattern substantially similar to the first print pattern by discharging a second sequence of ink droplets;
- and
- a measuring unit disposed proximate to the inkjet printhead to compare each ink droplet of the first sequence with a corresponding ink droplet in the second sequence, and to measure a volume for each of the compared ink droplets of the first sequence and the second sequence.
Dependencies are inferred from the claim text.