PATENT CLAIM ANALYSIS

Application Number: 15918766
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-08
Patent Classification: ["324", "658000"]

Abstract:
On the basis of the physical principle that a capacitance value is inversely proportional to the distance between capacitive electrodes, the spatial structure of the surface of an object can be imaged by measuring a coupling capacitance between the surface of measured object and the electrode arrays on a surface of a sensor; for example, imaging may be performed to uneven spaces between ridge lines and valley lines of fingerprints. The present application provides a C-Q-T type capacitive fingerprint sensor. Firstly, coupling capacitance differences between the fingerprints and the electrodes of the sensor are converted into charge quantity differences, then the charge quantity differences are converted into time differences, and edge signals carrying the time differences are output. Fingerprint sensors are grouped into an array, reading and data combination may be performed to the edge signals, and imaging may be performed to fingerprints.

Claim (Index 15):
A capacitive fingerprint sensor, comprising: a target electrode, a sensing electrode, a driving electrode, a first level driver, a second level driver, a first initialization switch, a first reference level and a charge transfer switch, wherein:\n the sensing electrode comprises one or more sensing electrodes, and is connected to a first port of the first initialization switch and a first port of the charge transfer switch; the target electrode is a surface of a target to be measured, is connected to the first level driver and is positioned above the sensing electrode, wherein a dielectric layer is formed between the target electrode and the sensing electrode, and a target capacitance is formed between the target electrode and the sensing electrode; the driving electrode comprises one or more driving electrodes, is connected to the second level driver and is positioned below the sensing electrode, wherein a dielectric layer is formed between the driving electrode and the sensing electrode, and a driving capacitance is formed between the driving electrode and the sensing electrode; the first level driver is connected to a first level control signal and the target electrode; the second level driver is connected to a second level control signal and the driving electrode; the first port of the first initialization switch is connected to the sensing electrode, and a second port of the first initialization switch to the first reference level; the first reference level is connected to the second port of the first initialization switch; the first port of the charge transfer switch is connected to the sensing electrode; the first level driver outputs to a sensor ground inverse AC components of a level V 11  and a level V 12 .

Metadata:
- Claim Count in Document: 41.0
- Percentile: 90.0
- Lexical Diversity: 2.03947
- Patent Class: 324.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15230368', '15109626', '15779871', '15694755', '15875188']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5312854213890813
- 35 USC 102 Novelty (BERT): 0.521905100016559
- Combined Prediction Score: 0.5303473892518291
- Mean Citation Score: 249.538752
- Max Citation Score: 346.09607
- Similarity Product: 329.7495588422197

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test