The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2006
Filed:
Oct. 17, 2002
Robert Lechevalier, Golden, CO (US);
Robert LeChevalier, Golden, CO (US);
Clare Micronix Integrated Systems, Inc., Alisa Viejo, CA (US);
Abstract
A method and system for controlling a voltage used for precharging current-driven elements in a matrix, and a method of manufacturing a device to perform this function. Elements are driven during successive scan cycles, each having a precharge period and an exposure period. The elements conduct current during conduction periods, which typically have variable length within exposure periods. Conduction voltages are sensed at earlier times (e.g., near the beginning) and later times (e.g., near the end) within conduction periods. A precharge voltage is adapted based on a comparison of the earlier and later sensed conduction voltages, typically so as to reduce any average difference and thereby cause the voltage during exposure to be consistent.