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. 26, 2008
Filed:
Jan. 09, 2006
Hee Chul Lee, Daejeon, KR;
Chi Ho Hwang, Daejeon, KR;
Yong Soo Lee, Daejeon, KR;
Sang Gu Kang, Gyeonggi-do, KR;
Hee Chul Lee, Daejeon, KR;
Chi Ho Hwang, Daejeon, KR;
Yong Soo Lee, Daejeon, KR;
Sang Gu Kang, Gyeonggi-do, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Abstract
The present invention relates to a bolometer, and more specifically to a compensation circuit for compensating non-uniformity due to the difference of operating temperature between bolometers which exist in bolometer array using semiconductor material. A compensation circuit according to the present invention comprises a biasing part including a first transistor generating bias current according to the change of operating temperature to have a dependency of exponential function for the operating temperature of circuit, and a second transistor turned on/off according to the column signal of a bolometer array; a bolometer part including a variable resistor for detecting IR in a pixel base, a third transistor turned on/off according to the column signal of a bolometer array coupled to one end of the variable resistor, and a fourth transistor turned on/off according to the row signal of a bolometer array coupled to the other end of the variable resistor; and an off-set compensation part for compensating the non-uniformity of the bolometer unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile