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:
Jul. 23, 2002
Filed:
Dec. 30, 1999
Applicant:
Inventors:
Chan-Ki Kim, Kyoungki-Do, KR;
Kang-Jin Lee, Kyoungki-Do, KR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 5/335 ;
U.S. Cl.
CPC ...
H04N 5/335 ;
Abstract
A CMOS image sensor based on a correlated double sampling method includes a pixel array having M×N unit pixels, arranged in a matrix, for sensing an image to generate an analog image data with a reset voltage level and a data voltage level as an output signal, a ramp voltage generator for generating a updated reference voltage in response to a control signal, a comparator for comparing the reset voltage level with the reference voltage level, a double buffer for storing the digital value, and a reference voltage control means for comparing the reference voltage with the reset voltage level to generate the control signal.