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US 11,694,471 B2Granted
Biometric identification apparatus and biometric identification method using the same
AssigneeShanghai Harvest Intelligence Technology Co., Ltd.
InventorJiandong Huang
Life of this patent
Estimating the term…
Abstract
A biometric identification apparatus is provided to include a light-transmissible plate, a light filtering module, a display member and a photodetection member. The display member is configured to emit light, and the light is reflected by a surface of the light-transmissible plate and formed as an original reflected light. The light filtering module is configured to filter the original reflected light to obtain a light with a traveling direction in a predetermined angle range, and the photodetection member is configured to receive the light filtered by the light filtering module.
Claims22
A biometric identification apparatus, comprising:
- a light-transmissible plate, a light filtering module, a display member and a photodetection member;
- wherein said display member is configured to emit light, and the light is reflected by a surface of said light-transmissible plate to form an original reflected light;
- wherein said light filtering module is configured to filter the original reflected light to obtain a light with a traveling direction in a predetermined angle range, and said photodetection member is configured to receive the light filtered by said light filtering module;
- wherein said light filtering module includes an optical member;
- and
- wherein said optical member is configured to filter out a portion of the original reflected light with an incidence angle on a surface of said optical member smaller than a second critical angle, so as to obtain a second reflected light, the second reflected light is received by said photodetection member, and the second critical angle is a minimum incident angle at which the light emitted by said display member is totally reflected by said surface of said light-transmissible plate.
3 more elements
A biometric identification apparatus, comprising:
- a light-transmissible plate, a light filtering module, a display member and a photodetection member;
- wherein said display member is configured to emit light, and the light is reflected by a surface of said light-transmissible plate to form an original reflected light;
- wherein said light filtering module is configured to filter the original reflected light to obtain a light with a traveling direction in a predetermined angle range, and said photodetection member is configured to receive the light filtered by said light filtering module;
- wherein said light filtering module includes a first optical member and a second optical member;
- wherein said first optical member is configured to filter out a portion of the original reflected light with an incidence angle on a surface of said first optical member greater than a first critical angle, so as to obtain a first reflected light, and the first critical angle is a minimum incident angle at which the original reflected light is totally reflected by said surface of said first optical member;
- and
- wherein said second optical member is configured to filter out a portion of the first reflected light with an incidence angle on a surface of said second optical member smaller than a second critical angle, so as to obtain a second reflected light, and the second critical angle is a minimum incident angle at which the light emitted by said display member is totally reflected by said surface of said light-transmissible plate.
4 more elements
A biometric identification apparatus, comprising:
- a light-transmissible plate, a light filtering module, a display member and a photodetection member;
- wherein said display member is configured to emit light, and the light is reflected by a surface of said light-transmissible plate to form an original reflected light;
- wherein said light filtering module is configured to filter the original reflected light to obtain a light with a traveling direction in a predetermined angle range, and said photodetection member is configured to receive the light filtered by said light filtering module;
- wherein said light filtering module includes an optical member;
- and
- wherein said optical member is configured to filter out a portion of the original reflected light with an incidence angle on a surface of said optical member greater than a first critical angle, so as to obtain a first reflected light, the first reflected light is received by said photodetection member and the first critical angle is a minimum incident angle at which the original reflected light is totally reflected by said surface of said optical member.
3 more elements
Dependencies are inferred from the claim text.