Control of laser printhead for writing or erasing content

Patent metadata

Field	Value
Publication number	US-12240238-B2
Application number	US-202318389164-A
Country	US
Kind code	B2
Filing date	Nov 13, 2023
Priority date	Apr 22, 2020
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

A label modification unit may receive a label modification input that indicates a label modification associated with content being written to a label or erased from the label. The label modification unit may identify an area of the label that is associated with the label modification according to the label modification input. The label modification unit may determine, based on a size of the area, a spot size of a light beam that is configured to be emitted by a laser printhead to modify the content within the area. The label modification unit may determine, based on the spot size and the content, an optical path configuration for the laser printhead. The label modification unit may operate the laser printhead according to the optical path configuration to write the content to the area or erase the content from the area.

First claim

The invention claimed is:

1. A label modification unit comprising:
a single laser of one laser printhead configured to emit a light beam to modify content in an area of a label;
an optical element configured to control a spot size of the light beam;
a reflector system configured to control directional movement of the light beam; and
a controller configured to:
receive an input associated with modifying the content in the area of the label;
determine, based on the input and a physical configuration of the label, a size of the area of the label and a modification to the content in the area of the label; and
modify, based on the determined modification, the content in the area of the label by controlling a configuration of the single laser, the optical element, or the reflector system to write the content to at least a portion of the area of the label or erase the content from at least a portion of the area of the label.

2. The label modification unit of claim 1 , wherein the spot size of the light beam is configured to be less than or equal to the size of the area of the label.

3. The label modification unit of claim 1 , wherein the configuration includes:
an optical path configuration that identifies at least one of a spot size to modify the content in the area of the label or a movement rate to modify the content in the area of the label, and
a laser configuration that identifies a power level of the light beam.

4. The label modification unit of claim 1 , wherein the label is rewritable.

5. The label modification unit of claim 1 , wherein the controller, when modifying the content in the area of the label, is configured to control at least one of:
a power level of the light beam,
a position of an optical element to adjust the spot size, and
a position of one or more reflectors of the reflector system to cause the light beam to be moved within the area of the label.

6. The label modification unit of claim 1 , wherein the label is a thermally sensitive rewritable label.

Assignees

• Zebra Tech Corp

Inventors

• Beach Robert E
• Nanda Chinmay
• Clayton Richard Mark
• Seiter Paul
• Brown Patrick Martin
• Bozeki John J
• Perlowski Lucjan K

Classifications

• B41J2/04

  generating single droplets or particles on demand · CPC title

• B41J2/47

  using the combination of scanning and modulation of light · CPC title

• B41M7/0009

  Obliterating the printed matter; Non-destructive removal of the ink pattern, e.g. for repetitive use of the support · CPC title

• B41J2/475

  for heating selectively {by radiation or ultrasonic waves} · CPC title

• B41M5/26

  Thermography (B41M5/20, B41M5/24 take precedence); {Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used (B23K takes precedence; thermographic or photothermographic systems using noble metal compounds G03C1/494)} · CPC title