Patent ID: 9251397
Filing Date: 2016-02-02
CPC Classification: G06K

Claim Text:
1. A fingerprint image capturing device, comprising: a circuit substrate; an external casing disposed on the circuit substrate, wherein the external casing has a top opening formed on the top side thereof; a light-transmitting element disposed on the external casing to enclose the top opening of the external casing; and a fingerprint image capturing module disposed inside the external casing, wherein the fingerprint image capturing module includes: wherein a projection light beam generated by the light-emitting element is reflected by the light-splitting element and the light-reflecting curved surface of the first light-reflecting element in sequence to form an illumination light beam that first passes through the light-transmitting element and then is projected onto a fingerprint of a finger, the illumination light beam is reflected by the finger to form an image light beam that is projected onto the light-reflecting curved surface and then is reflected by the light-reflecting curved surface, the image light beam first sequentially passes through the light-splitting element and the lens assembly and then is projected onto the fingerprint image sensing element through the second light-reflecting element, and the fingerprint image sensing element receives the image light beam to obtain a fingerprint image of the fingerprint of the finger.