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US 2010/0259861 A1Published application
Solenoid drive method that conserves power
AssigneePertech Resources, Inc.
InventorJeff Maurice Wendt
Life of this patent
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Abstract
A drive method for an impact-printhead solenoid is provided that improves power efficiency with an extremely simple circuit configuration and no sensors. Consisting only of a power-FET (Field-Effect Transistor) and PWM (pulse-width-modulation) signals from a printer-controller, this system, using a novel PWM frequency-optimization technique, reduces printhead power usage by as much as 13%.
Claims5
An energy-saving solenoid-drive circuit and method comprising:
- a power supply, a switch means, a solenoid, and a controller to repetitively energize the circuit and solenoid.
Dependencies are inferred from the claim text.