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. 22, 2008
Filed:
Sep. 14, 2004
Hyun Kim, Gyeonggi-do, KR;
Young Jin Seo, Seoul, KR;
Jong Woo Ahn, Seoul, KR;
Seung Min Lee, Seoul, KR;
SA Hyang Hong, Seoul, KR;
Tae Hun Lee, Gyeonggi-do, KR;
Byung Kee Kwak, Daegu Metropolitan, KR;
Hyun Kim, Gyeonggi-do, KR;
Young Jin Seo, Seoul, KR;
Jong Woo Ahn, Seoul, KR;
Seung Min Lee, Seoul, KR;
Sa Hyang Hong, Seoul, KR;
Tae Hun Lee, Gyeonggi-do, KR;
Byung Kee Kwak, Daegu Metropolitan, KR;
Secutronix Inc., Seoul, KR;
Abstract
An optical fingerprint image input device for a mobile apparatus includes: a plate-shaped fingerprint contact member; a distortion correcting member for correcting distortions; light sources disposed at both sides of the fingerprint contact member, other than an inclined surface or a back light source in a liquid crystal display element; focusing means disposed at an inclined surface side of the distortion correcting member; and an image sensor. In other words, the fingerprint contact member and the distortion correcting member having respective set-up inclined angles are disposed to discern sweat, water or oil and to correct a trapezoidal distortion which is a disadvantage that occurs when a thin fingerprint contact medium is used, and to form a lens system comprised of a cylindrical lens and a spherical lens for adjustment of a ratio of transversal to longitudinal widths of an image.