Title:
METHOD AND SYSTEM FOR ADJUSTING THE VOLTAGE OF A PRECHARGE CIRCUIT
Document Type and Number:
WIPO Patent Application WO2003034391
Kind Code:
A3
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.
Inventors:
LECHEVALIER ROBERT E
Application Number:
PCT/US2002/033574
Publication Date:
April 01, 2004
Filing Date:
October 17, 2002
Export Citation:
Assignee:
CLARE MICRONIX INTEGRATED SYST (US)
International Classes:
C22B9/02; G01R31/00; G05F3/02; G09G3/10; G09G3/30; G09G3/32; G09G5/00; H02M1/08; H02M3/07; H03F1/08; H03F3/45; H03F3/68; G09G; (IPC1-7): G09G3/32
Domestic Patent References:
| WO2001027910A1 | 2001-04-19 |
Foreign References:
| US5949194A | 1999-09-07 | |||
| US5594463A | 1997-01-14 | |||
| US6067061A | 2000-05-23 | |||
| US4366504A | 1982-12-28 | |||
| EP1071070A2 | 2001-01-24 | |||
| US20010024186A1 | 2001-09-27 |
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