Methods and apparatus for droplet deposition

The controller corrects drive waveform assignments for actuator walls in droplet ejection heads to address droplet placement errors caused by polarity transitions, ensuring accurate and consistent droplet deposition at high frequencies.

GB2636560BActive Publication Date: 2026-06-24XAAR TECH LTD
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Patent Information

Authority / Receiving Office
GB · GB
Patent Type
Patents
Current Assignee / Owner
XAAR TECH LTD
Filing Date
2023-09-29
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

Droplet placement errors occur in high-frequency droplet ejection due to transitions in drive waveform polarity between consecutive pixel lines, causing some droplets to have lower velocity and misplacement on the medium.

Method used

A controller is used to provisionally assign drive waveforms to actuator walls based on input pixel data, correcting any mismatches to ensure consistent droplet ejection by adjusting the band of firing and non-firing fluid chambers and their assigned drive waveforms, employing various correction strategies to maintain high-quality droplet placement.

Benefits of technology

The solution effectively reduces droplet placement errors by ensuring consistent actuator wall motion, maintaining high-frequency droplet ejection accuracy and consistency across the deposition medium.

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Abstract

Methods or apparatuses for correcting errors which can occur in allocating drive waveforms. The method includes provisionally assigning, based on input pixel data, each fluid chamber within said array
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