Is a
Patent attributes
Patent Applicant
Patent Jurisdiction
Patent Number
Patent Inventor Names
Erik D. Barnes0
Harvey Weinberg0
Lawrence A. Singer0
Date of Patent
December 18, 2018
0Patent Application Number
152445320
Date Filed
August 23, 2016
0Patent Citations Received
...
Patent Primary Examiner
Patent abstract
Optical systems can emit train(s) of light pulses onto objects to derive a distance between the light source and the object. Achieving meter or centimeter resolution may require very short light pulses. It is not trivial to design a circuit that can generate narrow current pulses for driving a diode that emits the light pulses. An improved driver circuit has a pre-charge path comprising one or more inductive elements and a fire path comprising the diode. Switches in the driver circuit are controlled with predefined states during different intervals to pre-charge current in the one or more inductive elements prior to flowing current through the fire path to pulse the diode.
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