Fingerprint recognition device
AssigneeIndustrial Technology Research Institute
InventorsPing-Chen CHEN, Cheng-Hsuan LIN, Yu-Ling HSU, Ding-Zheng LIN
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Abstract
A fingerprint recognition device includes a light source, a light conversion layer, a light detector, and a light filter. The light source is configured to emit a first light having a first wavelength. The light conversion layer is configured to convert the first light to a second light having a second wavelength different from the first wavelength. The light detector is configured to detect the second light reflected by a fingerprint. The light filter is disposed between the light conversion layer and the light detector, and configured to substantially filter out the first light and substantially pass the second light.
Claims14
A fingerprint recognition device, comprising:
- at least one light source configured to emit a first light having a first wavelength λ1;
- a light conversion layer configured to convert the first light to a second light having a second wavelength λ2 different from the first wavelength λ1;
- at least one light detector configured to detect the second light reflected by a fingerprint;
- and
- a light filter disposed between the light conversion layer and the at least one light detector, the light filter configured to substantially filter out the first light and substantially pass the second light;
- wherein the light conversion layer is separated from the light filter by a gap.
Dependencies are inferred from the claim text.