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:
Jan. 02, 2001
Filed:
Jun. 30, 1998
Takehito Yoshino, Nara, JP;
Takashi Ohtsuka, Kyotanabe, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A predetermined area of a photo-sensing surface of a solar cell is illuminated, and a voltage vs. current characteristic is measured. Note, the rest of the photo-sensing surface which is not illuminated is called a dark area. Next, in a dark state in which the photo-sensing surface is not illuminated, a dark characteristic of the solar cell is measured. The obtained dark characteristic is multiplied by a ratio of the area of the dark area to the area of the photo-sensing surface, thereby a dark characteristic of the dark area is calculated. Then, a difference characteristic between the measured voltage vs. current characteristic and the dark characteristic of the dark area is calculated. The difference characteristic is multiplied by a ratio of the area of the photo-sensing surface to the area of the illuminated portion, thereby a voltage vs. current characteristic of the solar cell in a state corresponding to that the entire area of the photo-sensing surface is illuminated at once is obtained.