Method and apparatus to eject drops having straight trajectories

Abstract

Described herein is a method and apparatus for driving a drop ejection device to produce drops having straight trajectories. In one embodiment, a method for driving a drop ejection device having an actuator includes building a drop of a fluid with at least one drive pulse by applying a multi- pulse waveform having the at least one drive pulse and a straightening pulse to the actuator. Next, the method includes causing the drop ejection device to eject the drop with a straight trajectory in response to the pulses of the multi-pulse waveform. The straightening pulse is designed to ensure that the drop is ejected without a drop trajectory error.

Description

technical field [0001] Embodiments of the present invention relate to droplet ejection, and more particularly to ejecting droplets having a straight line trajectory. Background technique [0002] Drop ejection devices are used for various purposes, most commonly for printing images on various media. They are often referred to as inkjet or inkjet printers. Drop-on-demand drop ejection devices are used in many applications because of their flexibility and economy. A drop-on-demand device ejects one or more droplets in response to a specific signal, typically an electrical waveform or a waveform that may include a single pulse or multiple pulses. Different parts of the multi-pulse waveform can be selectively activated to generate droplets. The one or more drive pulses build up the droplets that emerge from the nozzles of the droplet ejection device. [0003] Drop ejection devices typically include a fluid path from a fluid supply to a nozzle path. The nozzle path terminate...

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Problems solved by technology

In either case, the image quality produced by the curved jet is degraded

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