Biometric device and method thereof and wearable carrier

Abstract

A biometric device includes a substrate, an image sensor, an optical layer and at least one infrared light emitting diode (IR LED). The image sensor is disposed on the substrate. The optical layer is disposed on the image sensor and includes a diffraction pattern. The IR LED is disposed on the diffraction pattern of the optical layer. The optical layer is located between the IR LED and the image sensor.

What is claimed is: 
     
         1 . A biometric device, comprising:
 a substrate;   an image sensor, disposed on the substrate;   an optical layer, disposed on the image sensor, and comprising a diffraction pattern; and   at least one infrared light emitting diode, disposed on the diffraction pattern of the optical layer, wherein the optical layer is located between the infrared light emitting diode and the image sensor.   
     
     
         2 . The biometric device as claimed in  claim 1 , wherein the image sensor comprises a plurality of photosensing units, and the photosensing units are arranged in an array. 
     
     
         3 . The biometric device as claimed in  claim 1 , wherein the optical layer further comprises a transparent substrate, and the diffraction pattern is disposed on the transparent substrate to define a plurality of slits. 
     
     
         4 . The biometric device as claimed in  claim 1 , wherein the biometric device is adapted to recognize a biological characteristic of a region of a biological body, and the infrared light emitting diode is located between the region of the biological body and the image sensor. 
     
     
         5 . The biometric device as claimed in  claim 1 , wherein the optical layer further comprises a first silicon oxide layer, a silicon nitride layer and a second silicon oxide layer, the silicon nitride layer is located between the first silicon oxide layer and the second silicon oxide layer, and the diffraction pattern is located on an upper surface of the first silicon oxide layer, and the second silicon oxide layer is located between the silicon nitride layer and the image sensor. 
     
     
         6 . The biometric device as claimed in  claim 5 , wherein the optical layer further comprises a metal layer and at least one conductive through hole, the metal layer is disposed on the upper surface of the first silicon oxide layer and covers a part of the diffraction pattern, and the conductive through hole is electrically connected between the metal layer and the image sensor, and the infrared light emitting diode is electrically connected to the image sensor through the metal layer and the conductive through hole. 
     
     
         7 . A biometric device, comprises:
 a substrate;   an image sensor, disposed on the substrate, and comprising a plurality of photosensing units;   a plurality of infrared light emitting diodes, disposed on the substrate, wherein the infrared light emitting diodes and the photosensing units are arranged in interleaving; and   an optical layer, comprising a plurality of lens portions, wherein the lens portions are aligned to a part of the photosensing units, an orthogonal projection of each of the lens portions on the substrate is overlapped with an orthogonal projection of the corresponding photosensing unit on the substrate.   
     
     
         8 . The biometric device as claimed in  claim 7 , wherein the photosensing units and the infrared light emitting diodes are located on a same horizontal plane. 
     
     
         9 . The biometric device as claimed in  claim 7 , wherein the optical layer further comprises a transparent panel portion, the transparent panel portion is disposed on the substrate and covers the infrared light emitting diodes and the photosensing units, and the lens portions are located on a top surface of the transparent panel portion. 
     
     
         10 . The biometric device as claimed in  claim 7 , wherein each of the infrared light emitting diodes has a first upper surface, and each of the photosensing units has a second upper surface, and the first upper surface is lower than the second upper surface. 
     
     
         11 . The biometric device as claimed in  claim 7 , wherein each of the infrared light emitting diodes has a first upper surface, and each of the photosensing units has a second upper surface, and the first upper surface is higher than the second upper surface. 
     
     
         12 . The biometric device as claimed in  claim 11 , further comprising:
 a plurality of wall structures, disposed on the substrate and surrounding each of the infrared light emitting diodes, wherein each of the wall structures has a third upper surface, and the third upper surface is higher than the first upper surface.   
     
     
         13 . The biometric device as claimed in  claim 11 , wherein a surrounding surface of each of the infrared light emitting diodes has a reflective material layer, and reflectivity of the reflective material layer is greater than 70%. 
     
     
         14 . The biometric device as claimed in  claim 7 , wherein the optical layer further comprises a transparent panel portion, the transparent panel portion is disposed on the infrared light emitting diodes, and the transparent panel portion, the infrared light emitting diodes and the image sensor define a plurality of air gaps, and the lens portions are located on a top surface of the transparent panel portion. 
     
     
         15 . The biometric device as claimed in  claim 7 , wherein the biometric device is adapted to recognize a biological characteristic of a region of a biological body, and the lens portions are located between the region of the biological body and the corresponding photosensing units. 
     
     
         16 . A wearable carrier, adapted to be worn on a user, the wearable carrier comprises:
 a display unit;   a strip unit, connected to the display unit at a first edge and a second edge opposite to each other; and   a biometric device as claimed in  claim 1 , disposed on the display unit or the strip unit for recognizing a biological characteristic of a region of a biological body.   
     
     
         17 . The wearable carrier as claimed in  claim 16 , wherein the biometric device is located on a display surface of the display unit, a back surface of the display unit opposite to the display surface, an outer surface of the strip unit or an inner surface of the strip unit opposite to the outer surface. 
     
     
         18 . A wearable carrier, adapted to be worn on a user, the wearable carrier comprising:
 a display unit;   a strip unit, connected to the display unit at a first edge and a second edge opposite to each other; and   the biometric device as claimed in  claim 7 , disposed on the display unit or the strip unit for recognizing a biological characteristic of a region of a biological body.   
     
     
         19 . The wearable carrier as claimed in  claim 18 , wherein the biometric device is located on a display surface of the display unit, a back surface of the display unit opposite to the display surface, an outer surface of the strip unit or an inner surface of the strip unit opposite to the outer surface. 
     
     
         20 . A biometric method, comprising:
 receiving a characteristic image data;   coupling a region of a biological body to a biometric device, wherein the biometric device comprises a plurality of photosensing units and a plurality of infrared light emitting diodes, and the photosensing units are disposed corresponding to the infrared light emitting diodes, and each of the infrared light emitting diodes is adapted to emit a light to the region of the biological body;   sequentially lighting at least a part of the infrared light emitting diodes and sequentially turning on the corresponding photosensing units, and making the corresponding photosensing units to receive the lights scattered by the region to respectively generate a recognition sensing image; and   comparing the recognition sensing image with the characteristic image data, and outputting a recognition result according to a comparison result.   
     
     
         21 . The biometric method as claimed in  claim 20 , wherein the corresponding photosensing units are turned on at the same time while, before or after at least a part of the infrared light emitting diodes are sequentially lighted. 
     
     
         22 . The biometric method as claimed in  claim 20 , wherein the characteristic image data is a vein image database. 
     
     
         23 . The biometric method as claimed in  claim 20 , wherein the biometric device further comprises a substrate and an optical layer, the optical layer comprises a diffraction pattern, the infrared light emitting diodes are disposed on the diffraction pattern of the optical layer, and the infrared light emitting diodes are located between the region of the biological body and the photosensing units, and the optical layer is located between the infrared light emitting diodes and the photosensing unit. 
     
     
         24 . The biometric method as claimed in  claim 20 , wherein the biometric device further comprises a substrate and an optical layer, the infrared light emitting diodes are disposed on the substrate, and the infrared light emitting diodes and the photosensing units are arranged in interleaving, the optical layer comprises a plurality of lens portions, the lens portions are aligned to a part of the photosensing units, an orthogonal projection of each of the lens portions on the substrate is overlapped with an orthogonal projection of the corresponding photosensing unit on the substrate, and the lens portions are located between the region of the biological body and the corresponding photosensing units. 
     
     
         25 . The biometric method as claimed in  claim 20 , wherein the region of the biological body comprises a vein.