Image forming apparatus
US-9193155-B2 · Nov 24, 2015 · US
Droplet inspection module and droplet inspection method
US2021122154A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021122154-A1 |
| Application number | US-202017079029-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 23, 2020 |
| Priority date | Oct 23, 2019 |
| Publication date | Apr 29, 2021 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An inspection module is disclosed for inspecting a droplet from an ink jet head. The inspection module includes a sensor located under the ink jet head and measuring a distance between the droplet and the sensor in real time; a variable lens changing an operating distance based on the measured distance of the sensor; and a camera for capturing an image of the droplet. The inspection module further includes a droplet inspecting part inspecting the droplet image captured by the camera.
First claim
Opening claim text (preview).
What is claimed is: 1 . An inspecting module for inspecting a droplet ejected from an ink jet head, the inspecting module comprising: a sensor located under the ink jet head and measuring a distance between the droplet and the sensor in real time; a variable lens changing an operating distance based on the measured distance; and, a camera for capturing an image of the droplet. 2 . The inspecting module according to claim 1 , further comprising a droplet inspecting part for inspecting the droplet captured by the camera. 3 . The inspecting module according to claim 2 , wherein the sensor is TOF (Time of Flight) sensor. 4 . The inspecting module according to claim 2 , wherein the variable lens is disposed outside of an area interfering with the ink jet head. 5 . The inspecting module according to claim 4 , wherein the area interfering with the ink jet head is under the ink jet head of which the ink is ejected. 6 . The inspecting module according to claim 5 , further comprising an illumination part. 7 . The inspecting module according to claim 6 , wherein the illumination part is white light telecentric illumination. 8 . The inspecting module according to claim 6 , wherein the illumination part is a RGB light source. 9 . The inspecting module according to claim 8 , wherein the droplet inspecting part obtains and inspects an image of the droplet per wavelength band using the RGB light source. 10 . The inspecting module according to claim 9 , wherein the droplet inspecting part performs the image processing by classifying according to the color of the droplet ejected from the ink jet head.
Assignees
Inventors
Classifications
detecting presence or properties of a dot on paper · CPC title
Printing mechanisms combined with apparatus providing a visual indication · CPC title
- B41J2/04501Primary
Control methods or devices therefor, e.g. driver circuits, control circuits · CPC title
with reflectors or illuminating devices · CPC title
detecting distance to paper · CPC title
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Frequently asked questions
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- What does patent US2021122154A1 cover?
- An inspection module is disclosed for inspecting a droplet from an ink jet head. The inspection module includes a sensor located under the ink jet head and measuring a distance between the droplet and the sensor in real time; a variable lens changing an operating distance based on the measured distance of the sensor; and a camera for capturing an image of the droplet. The inspection module furt…
- Who is the assignee on this patent?
- Semes Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B41J2/04501. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Apr 29 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).