Photon-drive fingerprint identification module

• US 9,813,594 B2
• Filed: 04/29/2015
• Issued: 11/07/2017
• Est. Priority Date: 01/28/2015
• Status: Active Grant

• Current Assignee: Gingy Technology Inc., Gingytech Technology Inc.
• Original Assignee: Gingy Technology Inc.
• Inventors: Wu, Jen-Chieh, Hung, Chun-Lang
• Primary Examiner(s): Stafira, Michael P
• Application Number:
  US14/700,104
• Publication Number:
  US 20160219195A1
• Time in Patent Office: 923 Days
• CPC Class Codes: G06V 10/147 Details of sensors, e.g. sensor lenses fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19
• CPC Class Codes: G06V 40/1312 direct reading, e.g. contactless acquisition
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: H04N 23/51 Housings

Abstract

A photon-drive fingerprint identification module configured to detect a fingerprint of a finger is provided, and the photon-drive fingerprint identification module includes at least a light emitting unit and a light detecting semiconductor array. The light emitting unit is configured to emit a detecting light to the finger, and the finger and the fingerprint reflect the detecting light and turn it into a signal light. The light detecting semiconductor array includes a plurality of light detecting semiconductor units arranged in an array, and the light detecting semiconductor units are configured to receive the signal light reflected by the finger and generate a plurality of electrical signals. Each of the light detecting semiconductor units sequentially includes an antireflection structure, a first type doped semiconductor layer and a second type doped semiconductor layer. The first type doped semiconductor layer is stacked between the antireflection structure and the second type doped semiconductor layer.

Claims

1. A photon-drive fingerprint identification module, configured to detect a fingerprint of a finger, the photon-drive fingerprint identification module comprising:

at least a light emitting unit, configured to emit a detecting light to the finger, wherein the finger and the fingerprint reflect the detecting light and turn the detecting light into a signal light; and

a light detecting semiconductor array, comprising a plurality of light detecting semiconductor units arranged in an array, wherein the light detecting semiconductor units are configured to receive the signal light reflected by the finger and generate a plurality of electric signals, each of the light detecting semiconductor units sequentially comprises an antireflection structure, a first type doped semiconductor layer and a second type doped semiconductor layer from a side close to the finger, wherein the first type doped semiconductor layer is stacked between the antireflection structure and the second type doped semiconductor layer, and the antireflection structure is disposed at a surface of the first type doped semiconductor layer.

2. The photon-drive fingerprint identification module as claimed in claim 1, further comprising a substrate, wherein the at least one light emitting unit and the light detecting semiconductor array are disposed on a surface of the substrate, and the light detecting semiconductor array is located between the finger and the substrate.

3. The photon-drive fingerprint identification module as claimed in claim 2, wherein the surface of the substrate comprises a detecting region and at least one light emitting region, the at least one light emitting region is located beside the detecting region, the light detecting semiconductor units are arranged in the detecting region, and the light emitting unit is disposed in the light emitting region.

4. The photon-drive fingerprint identification module as claimed in claim 3, wherein the at least one light emitting region is plurality of light emitting regions, the at least one light emitting unit is a plurality of light emitting units, and the light emitting region is located at a peripheral region of the detecting region.

5. The photon-drive fingerprint identification module as claimed in claim 3, wherein the detecting region has a rectangular profile, and each side length of the detecting region is greater than or equal to 4 millimeter (mm).

6. The photon-drive fingerprint identification module as claimed in claim 2, wherein the at least one light emitting unit has a light emitting surface, and the light emitting surface is parallel to the surface of the substrate.

7. The photon-drive fingerprint identification module as claimed in claim 2, wherein the at least one light emitting unit has a light emitting surface, and the light emitting surface is oblique to the surface of the substrate.

8. The photon-drive fingerprint identification module as claimed in claim 1, wherein the antireflection structures are an antireflection layer.

9. The photon-drive fingerprint identification module as claimed in claim 1, wherein the antireflection structure of each of the light detecting semiconductor units is a plurality of optical microstructures.

10. The photon-drive fingerprint identification module as claimed in claim 1, wherein a shortest distance between the light emitting unit and the light detecting semiconductor units is smaller than or equal to 20 mm.

11. The photon-drive fingerprint identification module as claimed in claim 1, wherein the light detecting semiconductor array further comprises a plurality of first electrodes and a second electrode, each of the first electrodes is electrically connected to the first type doped semiconductor layer of one of the light detecting semiconductor units, the second electrode is electrically connected to the second type doped semiconductor layers, and the first electrodes are configured to transmit the electric signals.

12. The photon-drive fingerprint identification module as claimed in claim 1, wherein the light detecting semiconductor units are configured to detect a target light, wherein a wavelength of the target light is within a specific waveband, and the specific waveband comprises a wavelength of the detecting light.

13. The photon-drive fingerprint identification module as claimed in claim 12, wherein the wavelength of the specific waveband is greater than or equal to 300 nanometer (nm) and is smaller than or equal to 3 micrometer (μ

m).

14. The photon-drive fingerprint identification module as claimed in claim 1, further comprising at least one processing unit, wherein the at least one processing unit is electrically connected to the light detecting semiconductor units, and converts the electric signals into at least one digital signal.