| 摘要 |
The present invention relates to a household appliance (10) for sensing of a fingerprint through the casing of the appliance, such as an oven, a cooking surface, a refrigerator, or a washing machine. The household appliance comprises a transparent casing element (12) and a fingerprint sensor (20) mounted to the inside of an exterior surface of said casing element (12). The sensor comprises a light source (21; 21'; 21"; 21"') emitting light for which said casing element (12) is transparent, a detector (23; 23"; 23"') for detecting reflected light emitted from said light source (21; 21'; 21"; 21"') and a light guiding means (22; 22'; 22"; 22"'; 22b"') for guiding emitted light from said light source (21; 21'; 21"; 21"') towards the casing element (12) and guiding light reflected at the exterior surface of the casing element (12) to the detector (23; 23"; 23"'). Thereby detection of a fingerprint image through said casing element (12) is rendered possible. |
