Invention Grant
- Patent Title: Determining alignment using fiducials
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Application No.: US17258505Application Date: 2019-03-11
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Publication No.: US11577527B2Publication Date: 2023-02-14
- Inventor: Li Qian , Xavier Domingo Reguant , Secundino Vicente Vicente
- Applicant: Hewlett-Packard Development Company, L.P.
- Applicant Address: US TX Spring
- Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee Address: US TX Spring
- International Application: PCT/US2019/021686 WO 20190311
- International Announcement: WO2020/185210 WO 20200917
- Main IPC: B41J3/60
- IPC: B41J3/60 ; B41J11/46 ; B41J3/54 ; H04N1/00

Abstract:
A print apparatus is disclosed. In some examples, the print apparatus comprises a print head to deposit print agent onto a substrate; a detector to detect a fiducial; a first light source to back-illuminate the substrate, such that light from the first light source is to be detected by the detector through the substrate; and processing apparatus. The processing apparatus is to operate the print head to deposit print agent to form a first fiducial on a first side of the substrate, the first fiducial comprising a shape of a first colour and having a first dimension, and a background of print agent of a second, different colour, wherein the first dimension of the shape does not exceed a corresponding dimension of the background; operate the print head to deposit print agent to form a second fiducial on a second, opposite side of the substrate, the second fiducial comprising an inverted version of the shape of the first colour; operate the first light source to back-illuminate the substrate; operate the detector to detect the first and second fiducials; and determine whether the first fiducial is aligned with the second fiducial. A method and a machine-readable medium are also disclosed.
Public/Granted literature
- US20210402800A1 DETERMINING ALIGNMENT USING FIDUCIALS Public/Granted day:2021-12-30
Information query
IPC分类: