MEMS actuator pressure compensation structure for decreasing humidity

摘要

A printhead including a venting system and an actuator array, wherein each actuator may include an actuator air chamber. The venting system includes an air path that vents each actuator air chamber to the atmosphere. The printhead further includes a dryer configured to remove moisture from air within the air path. The dryer may include a passive desiccant, an active resistive heater, or both.

主权项

1. A printhead, comprising:
a plurality of actuators, wherein each actuator comprises:
an actuator air chamber;an actuator electrode;a membrane configured to flex toward the electrode during activation of the electrode; andan actuator ink chamber, wherein the membrane is interposed between the actuator air chamber and the actuator ink chamber; a venting system comprising an air path that vents each actuator air chamber; and a dryer positioned within the air path, wherein the dryer is configured to decrease humidity of air within the air path.