Back to results
US 2001/0022882 A1Published application
Fingerprint recognition device and fingerprint reading window construction
AssigneeOMRON Corporation
InventorsHajimu Iwai, Isao Yoshida
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeOMRON Corporation
InventorsHajimu Iwai, Isao Yoshida
Estimating the term…
To enable easy replacement of a soiled fingerprint reading window. To reduce the number of light sources and achieve miniaturization. An aperture 5 is formed in part of a case K constituting the outer shell of a fingerprint recognition device, aperture 5 being covered by a cover member 4. Cover member 4 that covers aperture 5 constitutes part of case K. An aperture 6 formed in cover member 4 is covered by a window member 7 for fingerprint reading consisting of an optically transparent member. Window member 7 is arranged on the under-surface of cover member 4 and is resiliently held by the holding feet 11 formed on cover member 4. Light source 42, light-guide plate 43, reflection mirrors 33 and 34, image pick-up lens 35 and image pick-up element 36 are held by holding body H which is fixedly arranged in case K. Window member 7 is clamped between supporting faces 38 of holding body H and cover member 4 so as to be immovable. Light-guide plate 43 is arranged adjacent and inclined with respect to window member 7. Detection light rays from light-emitting elements 42 are sufficiently diffused while passing through light-guide plate 43 and are emitted in planar fashion from light-guide plate 43 towards window member 7.
A fingerprint recognition device, wherein part of the case that constitutes the outer shell of the fingerprint recognition device is constituted by a window member for fingerprint reading, which is composed of an optically transparent member that is formed as a separate element from this case, said window member being removably mounted to said case from outside this case.
A fingerprint reading window construction comprising a window member made of an optically transparent member and a cover member formed with an aperture covered by this window member,
A fingerprint recognition device of the optical type constructed such that detection light rays from a light source are directed onto a window member for fingerprint reading, comprising a light-guide plate arranged such that the plate surface thereof faces said window member,
A fingerprint recognition device of the optical type constructed such that detection light rays from a light source are directed onto a window member for fingerprint reading comprising an optically transparent member, and detection light rays reflected by the window member are input to an image pick-up element;
Dependencies are inferred from the claim text.