# US 2019/0168504 A1 · Image processing method, automatic image printing method, and automatic printing apparatus nozzle

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- Number: US 2019/0168504 A1
- Document ID: US20190168504A1
- Status: Published application
- Kind: A1
- Application number: 16/268,368
- Filed: 2019-02-05
- Published: 2019-06-06
- Earliest claimed: 2017-05-12
- Assignees: Roboprint Co., Ltd.
- Applicants: Roboprint Co., Ltd.
- Inventors: Jung Kyu PARK
- Web page: https://patentgrep.com/patent/US20190168504A1

## CPC

- B41J 2/04508: {aiming at correcting other parameters}
- B41J 2/04581: {controlling heads based on piezoelectric elements}
- G06T 3/403: Edge-driven scaling; Edge-based scaling
- G06T 3/4038: Image mosaicing, e.g. composing plane images from plane sub-images
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

An image processing method includes a first step of matching the image to the target surface, a second step of dividing the target surface into a plurality of preliminary divided regions, a third step of acquiring a first preliminary divided region among the plurality of preliminary divided regions, a fourth step of dividing the target surface into a plurality of final divided regions, on the basis of a preliminary divided image included in the first preliminary divided region of the image matched to the target surface, and a fifth step of setting a print starting position for respective final divided images included in the plurality of final divided regions by using a boundary line that defines the plurality of final divided regions.

## Claims

### Claim 1

A nozzle for an automatic printing apparatus provided in the automatic printing apparatus for automatically printing an image on a target surface of a structure, the nozzle comprising:
a nozzle tip including an ejection hole for ejecting ink;
a main body part configured to fix the nozzle tip to a predetermined position, the main body part including an inlet passage, through which ink is introduced, that is configured to communicate with the ejection hole, a recovery passage configured to communicate with the inlet passage so that ink remaining in the inlet passage is recovered, and a compressed air passage for compressed air to be supplied so that the compressed air is ejected around the nozzle tip; and
a piezoelectric part disposed in the main body part and configured to cause closing and opening of the ejection hole to be repeated by repeating elongation and contraction according to an applied voltage so that the ink is ejected through the ejection hole.

### Claim 2 (depends on 1)

The nozzle of claim 1, wherein:
the piezoelectric part includes a recessed part formed to be recessed at an end side closing the ejection hole; and
the recessed part temporarily stores ink before the ink is ejected through the ejection hole.

### Claim 3 (depends on 2)

The nozzle of claim 2, wherein:
the piezoelectric part is disposed in the main body part such that a gap is formed between the piezoelectric part and the main body part; and
the ink introduced through the inlet passage is introduced into the gap.

### Claim 4 (depends on 3)

The nozzle of claim 3, wherein the piezoelectric part includes a drain hole configured to cause the recessed part and the gap to communicate and, when the ink is ejected through the ejection hole, prevents the ink from stagnating in the recessed part.