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:
Nov. 28, 1995
Filed:
Apr. 21, 1994
Applicant:
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348322 ; 348296 ; 348298 ; 348311 ; 327534 ; 257231 ;
Abstract
A method for determining a charge/voltage conversion ratio of a solid state image pickup element with an electronic shutter function which is capable of transferring signal charge accumulated in a photosensitive portion to a substrate. A voltage of a predetermined first level is applied to the substrate to measure an output voltage at an output portion, and then a voltage of a second level higher than that of the first level is applied to the substrate to measure a current flowing through the substrate, thereby obtaining a charge/voltage conversion ratio in accordance with a ratio between the measured output voltage and the measured current.