CN106971137B - Detection device of fingerprint sensor, fingerprint sensor and electronic equipment - Google Patents
Detection device of fingerprint sensor, fingerprint sensor and electronic equipment Download PDFInfo
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- CN106971137B CN106971137B CN201610424287.XA CN201610424287A CN106971137B CN 106971137 B CN106971137 B CN 106971137B CN 201610424287 A CN201610424287 A CN 201610424287A CN 106971137 B CN106971137 B CN 106971137B
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
Abstract
A detection device for detecting a fingerprint sensor includes an electrode including a sensor electrode and a conductive protective element surrounding the sensor electrode. The detection device includes: the driving module is connected with the conductive protection element and used for providing a driving signal for the conductive protection element; the receiving module is connected with the sensor electrode and is used for receiving a sensing signal output by the sensor electrode; and the judging module is connected with the receiving module and is used for judging whether the sensor electrode has defects according to the induction signals of the receiving module. The invention can detect whether the fingerprint sensor has defects or not without applying fingers and conductors to the fingerprint sensor, thereby improving the detection efficiency. The invention also provides a fingerprint sensor with higher quality and electronic equipment.
Description
Technical Field
The present invention relates to the field of fingerprint sensors, and in particular, to a detection method and device for detecting a fingerprint sensor, and an electronic device.
Background
The self-contained fingerprint sensor comprises a detection circuit and sensor electrodes arranged in a two-dimensional array. In use, the detection circuit applies a drive signal to each sensor electrode and detects the sense signal of each sensor electrode, each sensor electrode constituting a pixel of the fingerprint sensor. Thus, when a finger acts on the fingerprint sensor, each sensor electrode can detect the voltage change caused by a point corresponding to the fingerprint, so that the depth of the point corresponding to the fingerprint can be described, and the lines of the whole fingerprint are described together with other sensor electrodes (pixels), so that a fingerprint image is formed.
However, the sensor electrode itself and the connection between the sensor electrode and the detection circuit may have defects, which may cause the fingerprint sensor to have dead spots, and some defects may cause the whole fingerprint sensor to fail to work normally, even after the fingerprint sensor is assembled to the fingerprint recognition module, may cause the whole fingerprint recognition module to fail to work normally. Therefore, detection by the fingerprint sensor is important.
However, the detection of the fingerprint sensor at present needs to apply a finger or other conductive materials (such as conductive adhesive) on the fingerprint sensor, and then detect the sensing signal of each sensor electrode to determine whether the sensing signal meets the requirement, which is very inconvenient and has low detection efficiency.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a detection method and a detection device for detecting a fingerprint sensor, and an electronic apparatus.
The invention provides a detection method for detecting a fingerprint sensor, wherein the fingerprint sensor comprises an electrode, the electrode comprises a sensor electrode, and the detection method comprises the following steps:
a detection step of applying a driving signal to a part of the electrodes in a predetermined manner and detecting sensing signals to which the other electrodes are coupled until sensing signals of all the sensor electrodes are obtained; a kind of electronic device with high-pressure air-conditioning system
And judging whether the sensor electrode has defects or not according to the induction signals on the sensor electrode.
In some embodiments, the detecting step is based on mutual capacitance sensing principles, applying a drive signal to a portion of the electrodes and detecting sense signals to which other of the electrodes are coupled.
In some embodiments, the sensor electrodes are arranged in a two-dimensional array, and the detecting step includes the substeps of:
applying a driving signal to the sensor electrodes of N x k+c rows or columns, wherein k is a natural number and comprises zero, N is a natural number and is greater than or equal to 2, c is a natural number and comprises zero, c is less than N, N x k+c is less than or equal to N, and c and k are not zero at the same time, and N is the total number of rows or total columns of the sensor electrodes;
detecting sensing signals of the sensor electrodes except for the sensor electrodes of n x k+c rows or columns;
applying a drive signal to one of the sensor electrodes of a row or column other than the sensor electrode of a n x k + c row or column; a kind of electronic device with high-pressure air-conditioning system
Sensing signals of the sensor electrodes of row n x k + c or column are detected.
In some embodiments, the sensor electrodes are arranged in a two-dimensional array, and the detecting step includes the substeps of:
applying a drive signal to the sensor electrodes of 2 x k+1 rows or columns, wherein 2 x k+1 is equal to or less than N, k is a natural number and comprises zero, and N is the total number of rows or total columns of the sensor electrodes;
detecting sensing signals of 2k rows or columns of the sensor electrodes;
applying a drive signal to the 2k rows or columns of the sensor electrodes; a kind of electronic device with high-pressure air-conditioning system
Sensing signals of the sensor electrodes of 2 x k+1 rows or columns are detected.
In some embodiments, the electrode further comprises a guard ring surrounding the sensor electrode, the detection method comprising:
applying a drive signal to the guard ring; a kind of electronic device with high-pressure air-conditioning system
Sensing signals of the sensor electrodes are detected.
The invention provides a detection device for detecting a fingerprint sensor, the fingerprint sensor comprises an electrode, the electrode comprises a sensor electrode, and the detection device is characterized in that the detection device comprises:
a detection module for applying a driving signal to a part of the electrodes in a predetermined manner and detecting sensing signals to which other of the electrodes are coupled until sensing signals of all of the sensor electrodes are obtained; a kind of electronic device with high-pressure air-conditioning system
And the judging module is used for judging whether the sensor electrode has defects according to the induction signals of the sensor electrode.
In some embodiments, the detection module applies a drive signal to a portion of the electrodes and detects sense signals to which other of the electrodes are coupled based on mutual capacitance sensing principles.
In some embodiments, the sensor electrodes are arranged in a two-dimensional array, and the detection module is configured to:
applying a driving signal to the sensor electrodes of N x k+c rows or columns, wherein k is a natural number and comprises zero, N is a natural number and is greater than or equal to 2, c is a natural number and comprises zero, c is less than N, N x k+c is less than or equal to N, and c and k are not zero at the same time, and N is the total number of rows or total columns of the sensor electrodes;
detecting sensing signals of the sensor electrodes except for the sensor electrodes of n x k+c rows or columns;
applying a drive signal to one of the sensor electrodes of a row or column other than the sensor electrode of a n x k + c row or column; a kind of electronic device with high-pressure air-conditioning system
Sensing signals of the sensor electrodes of row n x k + c or column are detected.
In some embodiments, the sensor electrodes are arranged in a two-dimensional array, and the detection module is configured to:
applying a drive signal to the sensor electrodes of 2 x k+1 rows or columns, wherein 2 x k+1 is equal to or less than N, k is a natural number and comprises zero, and N is the total number of rows or total columns of the sensor electrodes;
detecting sensing signals of 2k rows or columns of the sensor electrodes;
applying a drive signal to the 2k rows or columns of the sensor electrodes; a kind of electronic device with high-pressure air-conditioning system
Sensing signals of the sensor electrodes of 2 x k+1 rows or columns are detected.
The invention provides a fingerprint sensor, which is characterized by comprising:
the sensor electrodes are arranged in a two-dimensional array; and
a detection device, comprising:
the driving module is selectively connected with the plurality of sensor electrodes and is used for providing driving signals to the plurality of sensor electrodes in a time-sharing manner;
a receiving module, which is selectively connected with the plurality of sensor electrodes and is used for receiving sensing signals output by the plurality of sensor electrodes; and
and the judging module is used for judging whether the sensor electrode with the defect exists or not according to the sensing signal received by the receiving module.
In some embodiments, at the same time, the driving module is electrically connected to one part of the sensor electrodes, the receiving module is electrically connected to another part of the sensor electrodes, and a mutual capacitance is formed between the two parts of the sensor electrodes.
In some embodiments, the fingerprint sensor is a mutual capacitance fingerprint sensor when detecting whether a sensor electrode is defective.
In some embodiments, the fingerprint sensor further comprises a fingerprint sensing circuit for driving the plurality of sensor electrodes to perform fingerprint sensing, the fingerprint sensor being a self-contained fingerprint sensor when performing fingerprint sensing.
The present invention provides a detection device for detecting a fingerprint sensor, the fingerprint sensor comprising an electrode, the electrode comprising a sensor electrode and a conductive protection element surrounding the sensor electrode, the detection device comprising:
the driving module is connected with the conductive protection element and used for providing a driving signal for the conductive protection element;
the receiving module is connected with the sensor electrode and is used for receiving a sensing signal output by the sensor electrode;
and the judging module is connected with the receiving module and is used for judging whether the sensor electrode has defects according to the induction signals of the receiving module.
In some embodiments, the detection device employs the principle of mutual capacitance to drive and sense the electrodes.
The present invention provides a fingerprint sensor, comprising:
an electrode comprising a sensor electrode and a guard ring surrounding the sensor electrode;
a detection device, comprising:
the detection module comprises a driving module and a receiving module, wherein the driving module is connected with the protection ring, the receiving module is connected with the sensor electrode, the driving module is used for providing driving signals for the protection ring, and the receiving module is used for receiving induction signals from the sensor electrode; a kind of electronic device with high-pressure air-conditioning system
And the judging module is used for judging whether the sensor electrode has defects according to the induction signals received by the receiving module.
In some embodiments, the detection device forms a mutual capacitance with the guard ring when detecting whether a sensor electrode is defective.
In some embodiments, the guard ring is located on the same layer as the sensor electrode.
In some embodiments, the electrode includes a plurality of sensor electrodes and a plurality of guard rings, the plurality of sensor electrodes are arranged in a two-dimensional array, the plurality of guard rings are integrally connected, and are disposed in gaps between the plurality of sensor electrodes.
In some embodiments, the fingerprint sensor is a mutual capacitance fingerprint sensor when detecting whether a sensor electrode is defective.
In some embodiments, the fingerprint sensor further comprises a fingerprint sensing circuit for driving the plurality of sensor electrodes to perform fingerprint sensing, the fingerprint sensor being a self-contained fingerprint sensor when performing fingerprint sensing.
In some embodiments, the guard ring is directly or indirectly connected to ground for discharging static electricity when the fingerprint sensing circuit drives the plurality of sensor electrodes to perform fingerprint sensing.
In some embodiments, the fingerprint sensor is a chip, and the electrodes and the detection device are integrated in the chip.
The present invention provides a fingerprint sensor, comprising:
the electrode comprises a plurality of sensor electrodes and a conductive protection element, wherein the conductive protection element is provided with a plurality of hollowed-out areas, and the sensor electrodes are respectively arranged in the hollowed-out areas;
a detection device, comprising:
the detection module comprises a driving module and a receiving module, wherein the driving module is connected with the conductive protection element, the receiving module is connected with the sensor electrode, the driving module is used for providing a driving signal for the conductive protection element, and the receiving module is used for receiving an induction signal from the sensor electrode; a kind of electronic device with high-pressure air-conditioning system
And the judging module is used for judging whether the sensor electrode has defects according to the induction signals received by the receiving module.
In some embodiments, the fingerprint sensor is a mutual capacitance fingerprint sensor when detecting whether a sensor electrode is defective.
In some embodiments, the fingerprint sensor further comprises a fingerprint sensing circuit for driving the plurality of sensor electrodes to perform fingerprint sensing, the fingerprint sensor being a self-contained fingerprint sensor when performing fingerprint sensing.
In some embodiments, the guard ring is directly or indirectly connected to ground for discharging static electricity when the fingerprint sensing circuit drives the plurality of sensor electrodes to perform fingerprint sensing.
The invention provides an electronic device comprising the fingerprint sensor.
According to the detection method and the detection device, the driving signal is applied to the electrode of the fingerprint sensor, and the driving signal is coupled to other electrodes by utilizing the fringe electric field, so that whether the sensor electrode has defects can be judged according to the voltage change information of the sensor electrode. Therefore, the fingerprint sensor can detect without applying fingers and conductors to the fingerprint sensor, and the detection efficiency is improved. Accordingly, the fingerprint sensor and the electronic device are high in quality.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic flow chart of a detection method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a fingerprint sensor.
Fig. 3 is a schematic functional block diagram of a detection device according to an embodiment of the present invention.
Fig. 4 is a schematic view showing a structure in which the detecting device shown in fig. 3 is connected to a part of electrodes.
Fig. 5 is a schematic diagram of a detection method according to an embodiment of the present invention.
Fig. 6 is another schematic diagram of a detection method according to an embodiment of the present invention.
Fig. 7 is a further schematic diagram of a detection method according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of a detection method according to another embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an embodiment of the electronic device of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout.
The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. It will be appreciated, however, by one skilled in the art that the inventive aspects may be practiced without one or more of the specific details, or with other structures, components, etc. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.
Referring to fig. 1 and 2, a detection method according to an embodiment of the present invention is used for detecting a fingerprint sensor 10, the fingerprint sensor includes an electrode 12, and the electrode 12 includes a sensor electrode 122. Preferably, the plurality of sensor electrodes 122 are arranged in a two-dimensional array. However, alternatively, the plurality of sensor electrodes 122 may be arranged in other regular or irregular patterns. The detection method comprises the following steps:
a detection step of applying a driving signal to a part of the electrodes 12 in a predetermined manner and detecting sensing signals to which the other electrodes 12 are coupled until sensing signals on all the sensor electrodes 122 are obtained; a kind of electronic device with high-pressure air-conditioning system
And judging whether the sensor electrode 122 has a defect or not according to the sensing signal on the sensor electrode 122. Preferably, the detecting step detects the sensor electrode 122 based on the principle of mutual capacitance.
Referring to fig. 3 and fig. 4 together, the detecting device 20 according to the embodiment of the present invention includes a detecting module 22 and a judging module 24. The detection module 22 is configured to apply a driving signal to a portion of the electrodes 12 in a predetermined manner and detect sensing signals coupled to other electrodes 12 until sensing signals of all the sensor electrodes 122 are obtained. The judging module 14 is configured to judge whether the sensor electrode 122 has a defect according to the sensing signal on the sensor electrode 122.
In some embodiments, the detection method may be performed by the detection apparatus 20, for example, the detection step may be performed by the detection module 22, and the determination step may be performed by the determination module 24.
The detection method and the detection device 20 according to the embodiments of the present invention apply the driving signal to the electrode 12 of the fingerprint sensor 10 itself, and couple the driving signal to the other electrode 12 by using the fringe electric field, so that it is possible to determine whether the sensor electrode 122 has a defect according to the sensing signal coupled to the sensor electrode 122. For example, the driving signal and the sensing signal are both voltage signals. In detection, a predetermined voltage value of the sensing signal of the sensor electrode 122 under the fringe field coupling effect can be obtained through theory or experiment, then the detected voltage value of the sensor electrode 122 is compared with the predetermined voltage value, and if the detected voltage value is equal to or approximately equal to the predetermined voltage value, the sensor electrode 122 is proved to be capable of performing normal detection during normal operation, so that the absence of defects can be judged. Conversely, it may be determined that the sensor electrode 122 may have a defect. Therefore, it is possible to detect without applying a finger or a conductive body to the fingerprint sensor 10, and the detection efficiency is improved.
The electrode 12 may be a copper foil and is formed on a substrate (not shown) through a semiconductor process, thereby constituting a part of the structure of the fingerprint sensor 10. In some embodiments, electrodes 12 may all be sensor electrodes 122. Each sensor electrode 122 may constitute one pixel of the fingerprint sensor 10. In this way, parameters such as sensing area and resolution of the fingerprint sensor 10 can be controlled by setting the number and arrangement of the sensor electrodes 122.
Further, the detection module 22 includes a driving module 221 and a receiving module 223. The driving module 221 is selectively connectable to the plurality of sensor electrodes 122 for time-sharing supply of driving signals to the plurality of sensor electrodes 122. The receiving module 223 is selectively connectable with the plurality of sensor electrodes 122, for receiving sensing signals output from the plurality of sensor electrodes 122. The judging module 24 is connected to the receiving module 223, and is configured to judge whether the sensor electrode 122 has a defect according to the sensing signal received by the receiving module 223.
The driving module 211 is selectively connectable with the plurality of sensor electrodes 122, for example, through a switch (not shown). The receiving module 223 is selectively connectable to the plurality of sensor electrodes 122, for example, by a switch (not shown).
At the same time, the driving module 211 is electrically connected to one part of the sensor electrodes 122, the receiving module 223 is electrically connected to the other part of the sensor electrodes 122, and a mutual capacitance is formed between the two parts of the sensor electrodes 122.
For example, the driving module 221 is electrically connected to the sensor electrodes 122 of the first row through a switch, and provides a driving signal to the sensor electrodes 122 of the first row. The receiving module 223 is electrically connected to the sensor electrodes 122 of the second row through a switch, and receives a sensing signal from the sensor electrodes 122 of the second row. The judging module 24 judges whether or not there is a defective electrode in the sensor electrodes 122 of the second row according to the sensing signal received by the receiving module 223. For example, if none of the sensor electrodes 122 in the second row has a defect, the sensing signals received by the receiving module 223 should be the same or approximately the same. If there is a defect in the sensor electrodes 122 in the second row of sensor electrodes 122, the sensing signal output by the defective sensor electrodes 122 to the receiving module 223 is different or significantly different from the sensing signals output by other normal sensor electrodes 122.
In the detection, the detection device 20 performs detection using the principle of mutual capacitance sensing, wherein the sensor electrodes 122 of the first row and the sensor electrodes 122 of the second row form mutual capacitance.
Similarly, the mutual capacitance detection principle is utilized to detect the defects of the sensor electrodes 122 of other even rows, and after all the sensor electrodes 122 of even rows are detected to be qualified, the defect detection is performed on the sensor electrodes 122 of odd rows until all the sensor electrodes 122 are detected.
However, the present application is not limited to the above-described detection sequence, and may be modified to other suitable detection methods, for example, it is also possible to detect defects in the sensor electrodes 122 of the first row after the sensor electrodes 122 of the second row are detected to be acceptable.
Preferably, the detecting device 20 is disposed in the fingerprint sensor 10, and the fingerprint sensor 10 is a chip. However, the detecting device 20 may alternatively be a device independent from the fingerprint sensor 10.
In addition, the fingerprint sensor 10 further includes a fingerprint sensing circuit (not shown). The fingerprint sensing circuit is configured to drive the plurality of sensor electrodes 122 to perform fingerprint sensing. The fingerprint sensing circuit provides an excitation signal to the sensor electrode 122 and receives a fingerprint sensing signal from the output of the sensor electrode 122, thereby acquiring fingerprint information.
Depending on the matching relationship between the detection circuit and the sensor electrode 122, the fingerprint sensor 10 may be a self-capacitance fingerprint sensor or a mutual capacitance fingerprint sensor, where the self-capacitance fingerprint sensor mainly refers to excitation and detection performed by the same sensor electrode, and the mutual capacitance fingerprint sensor mainly refers to excitation of some specific sensor electrodes and detection of voltage changes of the corresponding sensor electrodes.
The fingerprint sensor 10 according to the embodiment of the present invention is a self-contained fingerprint sensor when performing fingerprint sensing, and is a mutual-contained fingerprint sensor when detecting whether or not the sensor electrode 122 has a defect.
It should be noted that detecting whether the sensor electrode 122 has a defect is a detection performed by the fingerprint module factory before the fingerprint sensor 10 is shipped from the factory. The fingerprint sensor 10 performs fingerprint sensing, which is a work performed after the fingerprint sensor 10 is assembled to the electronic device 100 (for example, a cellular phone, see later).
For example, the fingerprint sensing circuit and the detecting device 20 are two different circuits, or the fingerprint sensing circuit multiplexes a portion of the detecting device 20's circuits, such as the multiplexing reception module 223. The fingerprint sensor 10 may further comprise a control unit (not shown) for controlling the fingerprint detection circuit and the detection device 20 to operate correspondingly according to the received instructions. When defect detection is performed, the instructions are for example from a detection device. When fingerprint sensing is performed, the instructions are for example from a host chip to which the electronic device 100 (see below) is applied.
As described above, when detecting whether or not the sensor electrode 122 is defective, for example, it is possible to determine whether or not the sensor electrode 122 is defective by controlling the detection circuit to apply a driving signal to a part of the sensor electrode 122 and then detecting a sense signal to which the remaining sensor electrodes 122 are coupled.
In embodiments where electrodes 12 are all sensor electrodes 122, the detecting step includes the substeps of:
applying a driving signal to the sensor electrodes 122 of N x k+c rows or columns, wherein k is a natural number and includes zero, N is a natural number and is greater than or equal to 2, c is a natural number and includes zero, c is less than N, N x k+c is less than or equal to N, and k and c are not zero at the same time, N is the total number of rows or total columns of the sensor electrodes;
sensing a sense signal on sensor electrodes 122 other than n x k + c rows or columns of sensor electrodes 122;
applying a drive signal to a row or column of sensor electrodes 122 other than the n x k + c row or column of sensor electrodes 122; a kind of electronic device with high-pressure air-conditioning system
Sensing signals of sensor electrodes 122 of row n x k + c are detected.
In some embodiments, the above-described sub-steps may be implemented by the detection module 22, that is, the detection module 22 may be configured to apply a driving signal to the sensor electrodes 122 of n×k+c rows or columns, where k is a natural number and includes zero, n is a natural number and is equal to or greater than 2, c is a natural number and includes zero, c is less than n, detect an induction signal of the sensor electrodes 122 except for the sensor electrodes 122 of n×k+c rows or columns, apply a driving signal to the sensor electrodes 122 of one row except for the sensor electrodes 122 of n×k+c rows or columns, and detect an induction signal of the sensor electrodes 122 of n×k+c rows or columns.
In these embodiments, the sensing principle based on mutual capacitance is that the sensing signals of all sensor electrodes 122 are obtained by applying driving signals to the sensor electrodes 122 in rows or columns. In this way, the application of the driving signal and the detection of the sensing signal are relatively regular, the control of the detection circuit can be simplified, and the processing of the detected sensing signal can be facilitated.
It will be appreciated that n, k and c are constants, are not variables, and can be set as desired.
It will be appreciated that where n is relatively large, a drive signal will be applied to the sensor electrodes 122 of the rows or columns that are relatively far apart, and thus there may be sensor electrodes 122 that are relatively far from the sensor electrodes 122 to which the drive signal is applied, resulting in weaker sense signals, however, it will be appreciated that even with such an embodiment, sense signals are stronger than when no drive signal is applied, and thus detection may be achieved. For example, when n=10, c=1, i.e., a driving signal is applied to the sensor electrode 122 of 10k+1 rows or columns, the sensor electrode 122 of 5k+1 rows or columns is farther from the sensor electrode 5 row or column to which the driving signal is applied, and thus, the sense signal generated by the sensor electrode 122 of 5k+1 rows or columns may be weaker. However, such an inductive signal may still be used to detect the sensor electrode 122. In such an embodiment, detection can be achieved by applying a drive signal to the sensor electrodes 122 of fewer rows or columns, and thus, the power consumption of detection can be reduced.
Of course, in other embodiments, n may be reasonably set to more efficiently and accurately detect the sensor electrode 122, so as to avoid weaker sensing signals. It will be appreciated that the smaller n, the stronger the sense signal that the same drive signal can produce. Referring to fig. 5, n=2 and c=1, that is, the sub-steps of the detection step are:
applying a driving signal to the sensor electrodes 122 of the odd (2k+1) rows;
sensing signals of the sensor electrodes 122 of even numbered rows (except for odd numbered rows) are detected;
applying a driving signal to the sensor electrodes 122 of the even numbered rows (except the odd numbered rows); a kind of electronic device with high-pressure air-conditioning system
The sensing signal of the sensor electrode 122 of the odd-numbered row (2k+1) is detected.
Referring to fig. 6, another example of the above embodiment may be to apply a driving signal to the sensor electrodes 122 in columns, and n=2, c=1, that is, the sub-steps of the detection step are:
applying a driving signal to the sensor electrodes 122 of the odd (2k+1) columns;
sensing signals of the sensor electrodes 122 of even columns (except for odd columns) are detected;
applying a driving signal to the sensor electrodes 122 of even columns (except for odd columns); a kind of electronic device with high-pressure air-conditioning system
The sense signal of the sensor electrode 122 of the odd column (2k+1) is detected.
The advantages of the above two examples are that the detected voltage signal is strong, which is advantageous for the later judgment, because the sensor electrode 122 to which the driving signal is applied is only interlaced with the sensor electrode 122 to be detected, and the coupling effect of the fringe electric field is strong.
Referring to fig. 6, in another example, a driving signal may be applied to the rows of sensor electrodes 122, where n=3 and c=1, that is, the sub-steps of the detection step are:
applying a driving signal to the sensor electrodes 122 of 3k+1 rows;
sensing signals of the sensor electrodes 122 other than 3k+1 rows;
applying a driving signal to one row (e.g., 3k+2 row) of sensor electrodes 122 other than 3k+1 row of sensor electrodes 122; a kind of electronic device with high-pressure air-conditioning system
The sensing signals of the sensor electrodes 122 of 3k+1 rows are detected.
It will be appreciated that in such an example, by reasonably selecting the number of rows of sensor electrodes 122 to which the drive signal is applied, the total number of sensor electrodes 122 to which detection is applied may be reduced, and thus power consumption may be reduced.
Of course, the above examples are merely illustrative of applying a drive signal or a drive signal variation signal to the sensor electrodes 122 in rows or columns to obtain sense signals for all of the sensor electrodes 122, and should not limit the scope of the present invention.
Referring to fig. 8, in the fingerprint sensor 10 according to another embodiment of the present invention, the electrode 12 includes a conductive protection element 124 in addition to the sensor electrode 122. The conductive protection element 124 is provided with a plurality of hollow areas 127, and the plurality of sensor electrodes 122 are respectively disposed in the hollow areas 127, and a gap exists between the sensor electrodes and the conductive protection element 124 to insulate the sensor electrodes from the conductive protection element 124.
Preferably, the conductive protection element 124 is of unitary construction and is located on the same layer as the sensor electrode 122.
The conductive protection element 124 may also be a plurality of guard rings disposed around the plurality of sensor electrodes 122, respectively. The plurality of guard rings may have a single annular structure or may be integrally connected to each other. However, the structure of the conductive protection member 124 is not limited to the structure described herein, and may be other suitable structures.
The detecting step comprises the following substeps:
applying a driving signal to the conductive protection element 124; a kind of electronic device with high-pressure air-conditioning system
The sensing signal of the sensor electrode 122 is detected.
In some embodiments, the above-described sub-steps may be implemented by the detection module 22, i.e., the detection module 22 may be used to apply a driving signal to the conductive protection element 124 and detect the sensing signal of the sensor electrode 122.
Referring to fig. 3 and fig. 4, in particular, the driving module 221 is connected to the conductive protection element 124 and provides the driving signal to the conductive protection element 124. The receiving module 223 is connected to the plurality of sensor electrodes 122, and receives sensing signals output from the sensor electrodes 122.
The judging module 24 judges whether the sensor electrode 122 has a defect according to the sensing signal received by the receiving module 223.
In this embodiment, the conductive protection element 124 and the plurality of sensor electrodes 122 form a mutual capacitance when performing defect detection on the sensor electrodes 122.
Similar to the foregoing, the detecting device 20 may be integrated into the fingerprint sensor 10 of the present embodiment, or may be a device independent from the fingerprint sensor 10.
The fingerprint sensor 10 further includes the fingerprint sensing circuit described above. The fingerprint sensing circuit is configured to drive the plurality of sensor electrodes 122 to perform self-contained fingerprint sensing. The fingerprint sensing circuit provides an excitation signal to the sensor electrode 122 and receives a fingerprint sensing signal from the output of the sensor electrode 122, thereby acquiring fingerprint information.
The conductive protection element 124 is grounded during fingerprint sensing of the fingerprint sensor 10, and plays a role of electrostatic protection for the sensor electrode 122. The ground signal voltage is typically 0 volts or around 0 volts, typically the device ground of the electronic device 100 (see below) to which the fingerprint sensor 10 is applied. It should be noted that the conductive protection element 124 may be directly or indirectly grounded.
When the conductive protection element 124 is indirectly grounded, the conductive protection element 124 is, for example, directly connected to a reference ground (not shown) that is connected to the device ground through a modulation circuit (not shown). The signal at the reference ground is a varying signal, for example a modulated signal from the modulation circuit. The modulation circuit correspondingly generates the modulation signal according to a grounding signal and a voltage driving signal on the equipment ground.
It will be appreciated that in these embodiments, detection using the conductive protective element 124 may eliminate the step of repeatedly applying the drive signal, thereby improving detection efficiency.
Referring to fig. 9, fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the invention. The electronic device 100 comprises the fingerprint sensor 10 of any of the embodiments described above.
Specifically, the electronic device 100 is, for example, a portable electronic product, a home electronic product, or a vehicle-mounted electronic product. However, the electronic device is not limited to the listed electronic products, but may be other suitable electronic products. The portable electronic product is, for example, a mobile terminal, and the mobile terminal is, for example, a mobile phone, a tablet computer, a notebook computer, a wearable product or other suitable mobile terminals. The household electronic products are suitable household electronic products such as intelligent door locks, televisions, refrigerators, desktop computers and the like. The vehicle-mounted electronic product is a suitable vehicle-mounted electronic product such as a vehicle-mounted display, a vehicle recorder, a navigator, a vehicle-mounted refrigerator and the like.
In some embodiments, the electronic device 100 includes a housing 104, the fingerprint sensor 10 is located within the housing 104, the housing 104 is provided with a through hole 106, and the through hole 106 exposes the fingerprint sensor 10.
Thus, the through-holes 106 may facilitate positioning of the finger with the fingerprint sensor 10 when a user is entering a fingerprint, facilitating user operation. In the present example, the through holes 106 are circular through holes, and it is understood that the through holes 106 may be square, oval, or other shaped through holes. The through hole 106 may be opened at a rear position of the case 104.
The fingerprint sensor 10 may also be disposed at a suitable location such as the front or side of the electronic device 100. Further, the fingerprint sensor 10 may also be disposed inside the electronic device 100, and the fingerprint sensor 10 is not necessarily exposed through a through hole.
In the description of embodiments of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of embodiments of the present invention and to simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting embodiments of the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In describing embodiments of the present invention, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be either fixedly coupled, detachably coupled, or integrally coupled, for example, unless otherwise indicated and clearly defined; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific circumstances.
In embodiments of the invention, unless explicitly specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different structures of embodiments of the invention. In order to simplify the disclosure of embodiments of the present invention, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and do not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, system that includes a processing module, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It is to be understood that portions of embodiments of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
Furthermore, functional units in various embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art within the scope of the invention.
Claims (9)
1. A detection device for detecting a fingerprint sensor, wherein the fingerprint sensor comprises an electrode, the electrode comprises a plurality of sensor electrodes and a conductive protection element surrounding the sensor electrodes, the conductive protection element is directly or indirectly grounded when the fingerprint sensor senses fingerprint, and plays a role of electrostatic protection for the sensor electrodes, and when detecting whether the sensor electrodes have defects, the sensor electrodes and the conductive protection element form mutual capacitance; the detection device includes:
the driving module is connected with the conductive protection element and used for providing a driving signal for the conductive protection element;
the receiving module is connected with the sensor electrode and is used for receiving a sensing signal output by the sensor electrode;
and the judging module is connected with the receiving module and is used for judging whether the sensor electrode has defects according to the induction signals of the receiving module.
2. A fingerprint sensor, characterized by: comprising the following steps:
an electrode comprising a plurality of sensor electrodes and a guard ring surrounding a plurality of said sensor electrodes; the protection ring is directly or indirectly grounded when the fingerprint sensor senses fingerprints, and plays a role in electrostatic protection for the sensor electrode;
the detection device is used for detecting the sensor electrode, and when detecting whether the sensor electrode has defects, the sensor electrode and the protection ring form mutual capacitance; the detection device includes:
the detection module comprises a driving module and a receiving module, wherein the driving module is connected with the protection ring, the receiving module is connected with the sensor electrode, the driving module is used for providing driving signals for the protection ring, and the receiving module is used for receiving induction signals from the sensor electrode; a kind of electronic device with high-pressure air-conditioning system
And the judging module is used for judging whether the sensor electrode has defects according to the induction signals received by the receiving module.
3. The fingerprint sensor of claim 2, wherein the guard ring is located on the same layer as the sensor electrode.
4. The fingerprint sensor of claim 3, wherein the electrode comprises a plurality of guard rings, the plurality of sensor electrodes are arranged in a two-dimensional array, the plurality of guard rings are integrally connected and disposed in gaps between the plurality of sensor electrodes.
5. The fingerprint sensor of claim 2, further comprising a fingerprint sensing circuit for driving the plurality of sensor electrodes to perform fingerprint sensing, the fingerprint sensor being a self-contained fingerprint sensor when performing fingerprint sensing.
6. The fingerprint sensor of claim 5, wherein the fingerprint sensor is a chip, and the electrodes and the detecting means are integrated in the chip.
7. A fingerprint sensor, characterized by: comprising the following steps:
the electrode comprises a plurality of sensor electrodes and a conductive protection element, wherein the conductive protection element is provided with a plurality of hollowed-out areas, and the sensor electrodes are respectively arranged in the hollowed-out areas; the conductive protection element is directly or indirectly grounded when the fingerprint sensor senses fingerprints, and plays a role in electrostatic protection for the sensor electrode;
the detection device is used for detecting the sensor electrode, the fingerprint sensor is a mutual capacitance type fingerprint sensor when detecting whether the sensor electrode has defects, and the detection device comprises:
the detection module comprises a driving module and a receiving module, wherein the driving module is connected with the conductive protection element, the receiving module is connected with the sensor electrode, the driving module is used for providing a driving signal for the conductive protection element, and the receiving module is used for receiving an induction signal from the sensor electrode; a kind of electronic device with high-pressure air-conditioning system
And the judging module is used for judging whether the sensor electrode has defects according to the induction signals received by the receiving module.
8. The fingerprint sensor of claim 7, further comprising a fingerprint sensing circuit for driving the plurality of sensor electrodes to perform fingerprint sensing, the fingerprint sensor being a self-contained fingerprint sensor when performing fingerprint sensing.
9. An electronic device comprising the fingerprint sensor of any one of claims 2-8.
Priority Applications (2)
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| CN201610424287.XA CN106971137B (en) | 2016-06-15 | 2016-06-15 | Detection device of fingerprint sensor, fingerprint sensor and electronic equipment |
| PCT/CN2017/087353 WO2017215496A1 (en) | 2016-06-15 | 2017-06-06 | Fingerprint-sensor testing apparatus, fingerprint sensor, and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610424287.XA CN106971137B (en) | 2016-06-15 | 2016-06-15 | Detection device of fingerprint sensor, fingerprint sensor and electronic equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866322A (en) * | 2012-08-29 | 2013-01-09 | 北京集创北方科技有限公司 | Touch device detection method |
| CN102981686A (en) * | 2012-08-29 | 2013-03-20 | 北京集创北方科技有限公司 | Method for detecting defects of capacitive touch screen device |
| CN205028270U (en) * | 2015-09-23 | 2016-02-10 | 深圳信炜科技有限公司 | Capacitive sensor , sensing device , sensing system and electronic equipment |
| CN206363327U (en) * | 2016-06-15 | 2017-07-28 | 深圳信炜科技有限公司 | The detection means of fingerprint sensor, fingerprint sensor, electronic equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6900644B2 (en) * | 2003-05-06 | 2005-05-31 | Ligh Tuning Tech. Inc. | Capacitive fingerprint sensor against ESD damage and contamination interference |
| US8279197B2 (en) * | 2009-08-25 | 2012-10-02 | Pixart Imaging Inc. | Method and apparatus for detecting defective traces in a mutual capacitance touch sensing device |
| CN105606948A (en) * | 2016-02-01 | 2016-05-25 | 北京集创北方科技股份有限公司 | Circuit detection method and system |
| CN106529383B (en) * | 2016-06-15 | 2023-12-05 | 柳州梓博科技有限公司 | Fingerprint sensor detection method and device, fingerprint sensor and electronic equipment |
| CN205983500U (en) * | 2016-06-15 | 2017-02-22 | 深圳信炜科技有限公司 | Fingerprint sensor's detection device , fingerprint sensor , electronic equipment |
-
2016
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-
2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866322A (en) * | 2012-08-29 | 2013-01-09 | 北京集创北方科技有限公司 | Touch device detection method |
| CN102981686A (en) * | 2012-08-29 | 2013-03-20 | 北京集创北方科技有限公司 | Method for detecting defects of capacitive touch screen device |
| CN205028270U (en) * | 2015-09-23 | 2016-02-10 | 深圳信炜科技有限公司 | Capacitive sensor , sensing device , sensing system and electronic equipment |
| CN206363327U (en) * | 2016-06-15 | 2017-07-28 | 深圳信炜科技有限公司 | The detection means of fingerprint sensor, fingerprint sensor, electronic equipment |
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