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:
May. 07, 1996
Filed:
Apr. 18, 1994
Applicant:
Inventor:
Geoffrey A Benton, Essex, GB;
Assignee:
Gilbarco Limited, Essex, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 571 ; 371 24 ; 371 671 ; 324 731 ; 345 33 ; 345 34 ; 345 41 ; 345 50 ; 345 87 ;
Abstract
An apparatus for and method of detecting errors in an electro-optic display of a type comprising one or more capacitive display elements. Each display element is connected to drive circuitry. The apparatus includes an isolator for electrically isolating the first electrode of a display element to be tested from the drive circuitry. A comparator compares a voltage on the first electrode of the element being tested with a reference voltage, and an error signal generator generates an error signal if the voltage on the first electrode crosses the reference voltage within a predetermined period of time.