Patent ID: 9194740
Filing Date: 2015-11-24
Classification: G01B,G01J,G06F,G06K

Abstract:
1. An optical displacement estimating apparatus, comprising: a light source, for transmitting incident light to a finger without utilizing any medium besides air, such that the light emits from the finger to generate passing-through light; and a sensor, for capturing a finger print image of the finger according to the passing-through light, wherein the finger print image comprises at least one finger print protruding part image and at least one finger print concave part image; a processing circuit, configured to perform displacement estimating to the finger according to images at different timings; a light isolating device, located between the sensor and the finger, for isolating light from least one direction, wherein the sensor still can receive the passing-through light via the light isolating device; a cover, wherein part of the cover is below the sensor and the light isolating device is above the sensor and all the cover.