CN106971137A - The detection means of fingerprint sensor, fingerprint sensor, electronic equipment - Google Patents
The detection means of fingerprint sensor, fingerprint sensor, electronic equipment Download PDFInfo
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- CN106971137A CN106971137A CN201610424287.XA CN201610424287A CN106971137A CN 106971137 A CN106971137 A CN 106971137A CN 201610424287 A CN201610424287 A CN 201610424287A CN 106971137 A CN106971137 A CN 106971137A
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- 238000005086 pumping Methods 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
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- 239000011889 copper foil Substances 0.000 description 1
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- 238000007639 printing Methods 0.000 description 1
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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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Abstract
The present invention discloses a kind of detection means, for detecting fingerprint sensor, and the fingerprint sensor includes electrode, and the electrode includes sensor electrode and the conductive protection element around the sensor electrode.The detection means includes：Drive module, is connected with the conductive protection element, for providing drive signal to the conductive protection element；Receiving module, is connected with the sensor electrode, for receiving the sensing signal exported from sensor electrode；Judge module, is connected with the receiving module, for judging that the sensor electrode whether there is defect according to the induced signal of the receiving module.The present invention need not apply finger and electric conductor when detecting that fingerprint sensor whether there is defect just can detect to fingerprint sensor, improve detection efficiency.The present invention also provides a kind of quality higher fingerprint sensor and electronic equipment.
Description
Technical field
The present invention relates to fingerprint sensor field, more particularly to a kind of detection method and inspection for being used to detect fingerprint sensor
Survey device, fingerprint sensor and electronic equipment.
Background technology
Self-tolerant fingerprint sensor includes the sensor electrode of detection circuit and two-dimensional array arrangement.In use, detection electricity
Road applies drive signal to each sensor electrode, and detects the induced signal of each sensor electrode, each sensor electrode
Constitute a pixel of fingerprint sensor.In this way, when finger is applied to fingerprint sensor, each sensor electrode just can be examined
Any caused voltage change of survey fingerprint correspondence, so as to describe the corresponding depth of any of fingerprint, and it is electric with other sensors
Pole (pixel) describes the lines of whole fingerprint jointly, forms fingerprint image.
However, sensor electrode in itself and sensor electrode with detection circuit connection there may be defect, cause fingerprint
There is bad point in sensor, some defects may cause whole fingerprint sensor can not normal work, or even in fingerprint sensor group
Being attached to after fingerprint recognition module may cause whole fingerprint recognition module can not normal work.Therefore, the detection of fingerprint sensor
It is particularly significant.
However, the detection of fingerprint sensor at present needs to apply finger or other conductive materials (e.g., on fingerprint sensor
Conducting resinl), the induced signal of each sensor electrode is then detected, judges whether to meet the requirements, it is inconvenient, and detection
Efficiency is low.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.Therefore, the present invention provides a kind of use
In the detection method and detection means, fingerprint sensor and electronic equipment of detection fingerprint sensor.
The present invention provides a kind of detection method, and for detecting fingerprint sensor, the fingerprint sensor includes electrode, described
Electrode includes sensor electrode, and the detection method comprises the following steps：
Detecting step, applies drive signal, and detect other electrode institute couplings to the part electrode in a predefined manner
The induced signal closed, until obtaining the induced signal of all sensor electrodes；And
Judgment step, judges the sensor electrode with the presence or absence of scarce according to the induced signal on the sensor electrode
Fall into.
In some embodiments, the detecting step is based on mutual capacitance type and senses principle, and electrode described to part, which applies, to be driven
Dynamic signal simultaneously detects the induced signal that other electrodes are coupled to.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detecting step includes following son
Step：
Drive signal is applied to the sensor electrode of n*k+c row or column, wherein, k is for natural number and including zero, n
Natural number and more than or equal to 2, c be natural number and including zero, c less than n, n*k+c≤N, and c it is different from k when be that zero, N is described
The total line number or total columns of sensor electrode；
Detect the induced signal of the sensor electrode in addition to the sensor electrode of n*k+c row or column；
Apply driving letter to sensor electrode described in the row or column in addition to the sensor electrode of n*k+c row or column
Number；And
Detect the induced signal of the sensor electrode of n*k+c row or column.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detecting step includes following son
Step：
Drive signal is applied to the sensor electrode of 2*k+1 row or column, wherein, 2*k+1≤N, k is natural number and bag
Include total line number or total columns that zero, N is the sensor electrode；
Detect the induced signal of the sensor electrode of 2k row or column；
Drive signal is applied to the sensor electrode of 2k row or column；And
Detect the induced signal of the sensor electrode of 2*k+1 row or column.
In some embodiments, the electrode also includes the protection ring around the sensor electrode, the detection side
Method includes：
Drive signal is applied to the protection ring；And
Detect the induced signal of the sensor electrode.
The present invention provides a kind of detection means, and for detecting fingerprint sensor, the fingerprint sensor includes electrode, described
Electrode includes sensor electrode, it is characterised in that the detection means includes：
Detection module, for applying drive signal to the part electrode in a predefined manner, and detects other electrodes
The induced signal being coupled to, until obtaining the induced signal of all sensor electrodes；And
Judge module, for judging the sensor electrode with the presence or absence of scarce according to the induced signal of the sensor electrode
Fall into.
In some embodiments, the detection module is to sense principle based on mutual capacitance type to apply drive to the part electrode
Dynamic signal simultaneously detects the induced signal that other electrodes are coupled to.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detection module is used for：
Drive signal is applied to the sensor electrode of n*k+c row or column, wherein, k is for natural number and including zero, n
Natural number and more than or equal to 2, c be natural number and including zero, c less than n, n*k+c≤N, and c it is different from k when be that zero, N is described
The total line number or total columns of sensor electrode；
Detect the induced signal of the sensor electrode in addition to the sensor electrode of n*k+c row or column；
Apply driving letter to sensor electrode described in the row or column in addition to the sensor electrode of n*k+c row or column
Number；And
Detect the induced signal of the sensor electrode of n*k+c row or column.
In some embodiments, the sensor electrode is arranged in two-dimensional array, and the detection module is used for：
Drive signal is applied to the sensor electrode of 2*k+1 row or column, wherein, 2*k+1≤N, k is natural number and bag
Include total line number or total columns that zero, N is the sensor electrode；
Detect the induced signal of the sensor electrode of 2k row or column；
Drive signal is applied to the sensor electrode of 2k row or column；And
Detect the induced signal of the sensor electrode of 2*k+1 row or column.
The present invention provides a kind of fingerprint sensor, it is characterised in that including：
Multiple sensor electrodes, arrange in two-dimensional array；With
Detection means, including：
Drive module, is connected with the multiple sensor electrode alternative, and drive signal is provided to described for timesharing
Multiple sensor electrodes；
Receiving module, is connected with the multiple sensor electrode alternative, the multiple sensor is come from for receiving
The sensing signal of electrode output；With
Judge module, the sensing signal received according to the receiving module is electric come the sensor for judging whether defect
Pole.
In some embodiments, in synchronization, the drive module is electrically connected with operative sensor electrode, described to connect
Receive module to electrically connect with another part sensor electrode, mutual capacitance is formed between two parts sensor electrode.
In some embodiments, the fingerprint sensor is mutual capacitance type when detection sensor electrode whether there is defect
Fingerprint sensor.
In some embodiments, the fingerprint sensor further comprises fingerprint sensing circuit, the fingerprint sensing electricity
Road is used to drive the multiple sensor electrode to perform fingerprint sensing, and the fingerprint sensor is to hold certainly when performing fingerprint sensing
Formula fingerprint sensor.
The present invention provides a kind of detection means, and for detecting fingerprint sensor, the fingerprint sensor includes electrode, described
Electrode includes sensor electrode and the conductive protection element around the sensor electrode, and the detection means includes：
Drive module, is connected with the conductive protection element, for providing drive signal to the conductive protection element；
Receiving module, is connected with the sensor electrode, for receiving the sensing signal exported from sensor electrode；
Judge module, is connected with the receiving module, for judging described pass according to the induced signal of the receiving module
Sensor electrode whether there is defect.
In some embodiments, the detection means is driven and felt to the electrode using mutual capacitance type principle
Survey.
The present invention provides a kind of fingerprint sensor, including：
Electrode, including sensor electrode and the protection ring around the sensor electrode；
Detection means, including：
Detection module, including drive module and receiving module, wherein, the drive module is connected with the protection ring, institute
State receiving module to be connected with the sensor electrode, the drive module is used to provide drive signal to the protection ring, described
Receiving module is used to receive the induced signal from the sensor electrode；And
Judge module, the sensor electrode is judged for the induced signal received according to the receiving module whether
Existing defects.
In some embodiments, the detection means is when detection sensor electrode whether there is defect, the sensing
Device electrode and protection ring formation mutual capacitance.
In some embodiments, the protection ring is located at same layer with the sensor electrode.
In some embodiments, the electrode includes multiple sensor electrodes and multiple protection rings, the multiple sensing
Device electrode is arranged in two-dimensional array, and the multiple protection ring is connected as one, is arranged between the multiple sensor electrode
In gap.
In some embodiments, the fingerprint sensor is mutual capacitance type when detection sensor electrode whether there is defect
Fingerprint sensor.
In some embodiments, the fingerprint sensor further comprises fingerprint sensing circuit, the fingerprint sensing electricity
Road is used to drive the multiple sensor electrode to perform fingerprint sensing, and the fingerprint sensor is to hold certainly when performing fingerprint sensing
Formula fingerprint sensor.
In some embodiments, when the multiple sensor electrode of fingerprint sensing circuit drives performs fingerprint sensing sensing
When, the protection ring is connected directly or indirectly to ground, for static electricity discharge.
In some embodiments, the fingerprint sensor is a chip, and the electrode and the detection means are integrated in
In the chip.
The present invention provides a kind of fingerprint sensor, including：
Electrode, including multiple sensor electrodes and a conductive protection element, wherein, set on the conductive protection element many
Individual void region, the multiple sensor electrode is separately positioned among the void region；
Detection means, including：
Detection module, including drive module and receiving module, wherein, the drive module connects with the conductive protection element
Connect, the receiving module is connected with the sensor electrode, the drive module is used to provide drive signal to the conductive guarantor
Protection element, the receiving module is used to receive the induced signal from the sensor electrode；And
Judge module, the sensor electrode is judged for the induced signal received according to the receiving module whether
Existing defects.
In some embodiments, the fingerprint sensor is mutual capacitance type when detection sensor electrode whether there is defect
Fingerprint sensor.
In some embodiments, the fingerprint sensor further comprises fingerprint sensing circuit, the fingerprint sensing electricity
Road is used to drive the multiple sensor electrode to perform fingerprint sensing, and the fingerprint sensor is to hold certainly when performing fingerprint sensing
Formula fingerprint sensor.
In some embodiments, when the multiple sensor electrode of fingerprint sensing circuit drives performs fingerprint sensing sensing
When, the protection ring is connected directly or indirectly to ground, for static electricity discharge.
The present invention provides a kind of electronic equipment, including the fingerprint sensor described in above-mentioned middle any one.
The detection method and detection means of embodiment of the present invention are applied by the electrode in fingerprint sensor in itself to be driven
Signal, and drive signal is coupled to other electrodes using fringe field, so as to the voltage change according to sensor electrode
Information judges that sensor electrode whether there is defect.Just can be with to fingerprint sensor it is therefore not necessary to apply finger and electric conductor
Detection, improves detection efficiency.Correspondingly, the quality of the fingerprint sensor and electronic equipment is higher.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention can be from description of the accompanying drawings below to embodiment be combined
It will be apparent and be readily appreciated that, wherein：
Fig. 1 is the schematic flow sheet of the detection method of embodiment of the present invention.
Fig. 2 is a kind of schematic diagram of fingerprint sensor.
Fig. 3 is the high-level schematic functional block diagram of the detection means of embodiment of the present invention.
Fig. 4 is the structural representation that detection means shown in Fig. 3 is connected with partial electrode.
Fig. 5 is a schematic diagram of the detection method of embodiment of the present invention.
Fig. 6 is another schematic diagram of the detection method of embodiment of the present invention.
Fig. 7 is another schematic diagram of the detection method of embodiment of the present invention.
Fig. 8 is the schematic diagram of the detection method of another embodiment of the invention.
Fig. 9 is the structural representation of an embodiment of electronic equipment of the present invention.
Embodiment
Embodiments of the present invention are described below in detail, the example of embodiment is shown in the drawings, wherein, identical or class
As label represent same or similar element or the element with same or like function from beginning to end.
The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, without being understood that
For limitation of the present invention.
Further, described feature, structure can be combined in one or more embodiment party in any suitable manner
In formula.Embodiments of the present invention are fully understood so as to provide there is provided many details in the following description.So
And, one of ordinary skill in the art would recognize that, without one or more in the specific detail, or using other structures,
Constituent element etc., can also put into practice technical scheme.In other cases, it is not shown in detail or describes known features or behaviour
Make to avoid the fuzzy present invention.
Fig. 1 and Fig. 2 is referred to, the detection method of embodiment of the present invention is used to detect fingerprint sensor 10, fingerprint sensing
Device includes electrode 12, and electrode 12 includes sensor electrode 122.It is preferred that multiple sensor electrodes 122 are arranged in two-dimensional array.
So, ground is changed, multiple sensor electrodes 122 can also arrange in Else Rule or non-regular.Detection method includes following
Step：
Detecting step, applies drive signal, and detect that other electrodes 12 are coupled to partial electrode 12 in a predefined manner
Induced signal, until obtaining the induced signal on all the sensors electrode 122；And
Judgment step, judges that sensor electrode 122 whether there is defect according to the induced signal on sensor electrode 122.
It is preferred that operation principle of the detecting step based on mutual capacitance, is detected to sensor electrode 122.
Also referring to Fig. 3 and Fig. 4, the detection means 20 of embodiment of the present invention includes detection module 22 and judge module
24.Detection module 22 is used to apply drive signal to partial electrode 12 in a predefined manner, and detects that other electrodes 12 are coupled to
Induced signal, until obtaining the induced signal of all the sensors electrode 122.Judge module 14 is used for according to sensor electrode
Induced signal on 122 judges that sensor electrode 122 whether there is defect.
In some embodiments, detection method can be implemented by detection means 20, and for example detecting step can be by detecting
Module 22 is implemented, and judgment step can be implemented by judge module 24.
The detection method and detection means 20 of embodiment of the present invention in the electrode 12 of fingerprint sensor 10 itself by applying
Plus drive signal, and drive signal is coupled to other electrodes 12 using fringe field, so as to according to sensor electrode 122
On the induced signal that is coupled to judge that sensor electrode 122 whether there is defect.For example, drive signal, induced signal are equal
For voltage signal.During detection, sensor electrode 122 can be obtained under fringe field coupling by theoretical or experiment
The scheduled voltage of induced signal, is then compared the magnitude of voltage of the sensor electrode 122 detected with scheduled voltage, if
Equal or approximately equal to scheduled voltage, then prove that sensor electrode 122 also can be detected normally in normal work,
Therefore it may determine that in the absence of defect.On the contrary, then may determine that sensor electrode 122 there may be defect.It is therefore not necessary to apply
Plus finger and electric conductor improve detection efficiency to that just can detect on fingerprint sensor 10.
Electrode 12 can be copper foil, and be formed at substrate (not shown) by semiconductor technology, so as to constitute fingerprint sensing
The part-structure of device 10.In some embodiments, electrode 12 can be entirely sensor electrode 122.Each sensor electrode
122 may be constructed a pixel of fingerprint sensor 10.In this way, can be by setting number and the arrangement of sensor electrode 122
Control the parameters such as the sensing region and resolution of fingerprint sensor 10.
Further, the detection module 22 includes drive module 221 and receiving module 223.The drive module 221 with
The multiple alternative connection of sensor electrode 122, drive signal is provided to the multiple sensor electrode for timesharing
122.The receiving module 223 is connected with the multiple alternative of sensor electrode 122, is passed for receiving from the multiple
The sensing signal that sensor electrode 122 is exported.The judge module 24 connects the receiving module 223, for being received according to described
The sensing signal that module 223 is received judges whether the sensor electrode 122 of defect.
The drive module 211 is for example alternative even with the multiple sensor electrode 122 by switching (not shown)
Connect.The receiving module 223 is for example connected by switching (not shown) with the multiple alternative of sensor electrode 122.
In synchronization, the drive module 211 is electrically connected with operative sensor electrode 122, the receiving module 223 with
Another part sensor electrode 122 is electrically connected, and mutual capacitance is formed between two parts sensor electrode 122.
Citing ground, the sensor electrode 122 of the drive module 221 and the first row electrically connects that there is provided driving by switching
Sensor electrode 122 of the signal to the first row.The sensor electrode 122 of the row of receiving module 223 and second is by switching electricity
Connection, receives the sensing signal of the sensor electrode 122 from the second row.The judge module 24 is according to the receiving module
It whether there is the electrode of defect in sensor electrode 122 of 223 sensing signals received to judge the second row.If for example, institute
Defect is all not present in the sensor electrode 122 for stating the second row, and the sensing signal that the receiving module 223 is received should be all identical
Or it is approximately the same.If having the existing defects of sensor electrode 122, existing defects in the sensor electrode 122 of second row
Sensor electrode 122 export and be different to the sensing signal of receiving module 223 or differ markedly from other normal sensors
The sensing signal that electrode 122 is exported.
In detection, the detection means 20 is detected using mutual capacitance type sensing principle, wherein, the sensing of the first row
The formation mutual capacitance of sensor electrode 122 of the row of device electrode 122 and second.
Similarly, defects detection is carried out to the sensor electrode 122 of other even number lines using mutual capacitance type Cleaning Principle, when
The sensor electrode 122 of all even number lines detect it is qualified after, then defects detection is carried out to the sensor electrode 122 of odd-numbered line,
Until having detected all sensor electrodes 122.
So, the application does not limit to above-mentioned detection ordering, changes ground, can be other suitable detection modes, example yet yet
Such as the sensor electrode 122 of the second row is detected it is qualified after, the following progress defect of sensor electrode 122 just to the first row
Detection is also possible.
It is preferred that the detection means 20 is arranged in the fingerprint sensor 10, the fingerprint sensor 10 is a core
Piece.So, ground is changed, the detection means 20 is alternatively independently of the device outside the fingerprint sensor 10.
In addition, fingerprint sensor 10 further comprises fingerprint sensing circuit (not shown).The fingerprint sensing circuit is used for
The multiple sensor electrode 122 is driven to perform fingerprint sensing.The fingerprint sensing circuit provides pumping signal and gives sensor electricity
Pole 122 simultaneously receives the fingerprint sensing signal exported from sensor electrode 122, so as to obtain finger print information.
Different from the matching relationship of sensor electrode 122 according to detection circuit, fingerprint sensor 10 can be that self-tolerant refers to
Line sensor either mutual capacitance type fingerprint sensor, self-tolerant fingerprint sensor is referred mainly to encourage and detected all by same sensing
Device electrode is carried out, and mutual capacitance type fingerprint sensor then refers mainly to encourage some specific sensor electrodes, and detects right therewith
The voltage change for the sensor electrode answered.
The fingerprint sensor 10 of embodiment of the present invention is self-tolerant fingerprint sensor when performing fingerprint sensing, in detection
Then it is mutual capacitance type fingerprint sensor when sensor electrode 122 whether there is defect.
It should be noted that detection sensor electrode 122 is fingerprint module factory in fingerprint sensor 10 with the presence or absence of defect
The detection carried out before dispatching from the factory.It is when fingerprint sensor 10 is assembled into electronic equipment that fingerprint sensor 10, which performs fingerprint sensing,
The work carried out after on 100 (for example, mobile phone, sees below).
Citing ground, the fingerprint sensing circuit is two different circuits from the detection means 20, or, the fingerprint
The circuit of sensing circuit multiplexing part detection means 20, for example, multiplexing reception module 223.The fingerprint sensor 10 can enter one
Step includes control unit (not shown), and described control unit is used to control fingerprint detection circuit according to the instruction received come correspondence
Worked with the detection means 20.When carrying out defects detection, the instruction is for example from detection device.When execution fingerprint sensing
When, the instruction for example carrys out the main control chip of electronic equipment 100 (seeing below) described in self-application.
As previously described, when detection sensor electrode 122 whether there is defect, for example, can be by controlling detection electricity
Road applies drive signal to operative sensor electrode 122, then detects the sensing letter that remaining sensor electrode 122 is coupled to
Number come judge sensor electrode 122 whether there is defect.
In the embodiment that electrode 12 is entirely sensor electrode 122, detecting step includes following sub-step：
Drive signal is applied to the sensor electrode 122 of n*k+c row or column, wherein, k is natural number and is certainly including zero, n
So number and more than or equal to 2, c be natural number and including zero, c less than n, n*k+c≤N, and k it is different from c when be zero, N be it is described biography
The total line number or total columns of sensor electrode；
Detect the induced signal on the sensor electrode 122 in addition to the sensor electrode 122 of n*k+c row or column；
Drive signal is applied to a line in addition to the sensor electrode 122 of n*k+c row or column or sensor electrode 122；
And
Detect the induced signal of the sensor electrode 122 of n*k+c row or column.
In some embodiments, above-mentioned sub-step can be realized by detection module 12, that is to say, detection module 12 can
For applying drive signal to the sensor electrode 122 of n*k+c row or column, wherein, k is natural number and is nature including zero, n
Count and be natural number more than or equal to 2, c and be less than the biography of n, detection in addition to the sensor electrode 122 of n*k+c row or column including zero, c
The induced signal of sensor electrode 122, a line sensor electrode 122 in addition to the sensor electrode 122 of n*k+c row or column is applied
The induced signal of drive signal and the sensor electrode 122 of detection n*k+c row or column.
In these embodiments, the sensing principle based on mutual capacitance, indeed through to embarking on journey or sensing in column
Device electrode 122 applies drive signal to obtain the induced signal of all the sensors electrode 122.In this way, the application of drive signal and
The detection of induced signal is more regular, can simplify the control of detection circuit, in addition, to the processing of the induced signal detected
Also it is easy to become.
It is appreciated that n, k and c are constant, and non-variables, it is possible to set according to demand.
It is appreciated that n than it is larger when, drive signal will be applied to the sensor electrode 122 for being spaced distant row or column,
So, it is understood that there may be from the sensor electrode 122 farther out of sensor electrode 122 for applying drive signal, cause induced signal compared with
It is weak, even if it should also be recognized, however, that such embodiment, induced signal is also stronger during drive signal than not applying, also therefore
Detection can be realized.For example, working as n=10, c=1, i.e., drive signal is applied to the sensor electrode 122 of 10k+1 row or column, then
The sensor electrode 122 of 5k+1 row or column is distant from the row or column of sensor electrode 5 for applying drive signal, accordingly, it is possible to lead
The sensing letter signal for causing the sensor electrode 122 of 5k+1 row or column to produce is weaker.But, such induced signal still can be used
In detection sensor electrode 122.And in such embodiment, can be to the sensor electrode 122 of fewer row or column
It is that detection can be achieved to apply drive signal, therefore, it can the power consumption of reduction detection.
Certainly, in other implementations, for more efficient, more accurately detection sensor electrode 122, it can also close
Reason sets n, so as to avoid induced signal weaker.It is appreciated that n is smaller, the induced signal that same drive signal can be produced
It is stronger.Referring to Fig. 5, n=2, c=1, in other words the sub-step of detecting step is：
Drive signal is applied to the sensor electrode 122 of odd number (2k+1) row；
Detect the induced signal of the sensor electrode 122 of even number line (in addition to odd-numbered line)；
The sensor electrode 122 of antithesis several rows (in addition to odd-numbered line) applies drive signal；And
Detect the induced signal of the sensor electrode 122 of odd-numbered line (2k+1).
Referring to Fig. 6, another example of embodiment above can apply driving to sensor electrode 122 in column
Signal, and n=2, c=1, in other words the sub-step of detecting step be：
Drive signal is applied to the sensor electrode 122 that odd number (2k+1) is arranged；
Detect the induced signal of the sensor electrode 122 of even column (in addition to odd column)；
The sensor electrode 122 of dual sequence (in addition to odd column) applies drive signal；And
Detect the induced signal of the sensor electrode 122 of odd column (2k+1).
The benefit of both the above example is, due to being applied in the sensor electrode 122 and examined sensing of drive signal
Device electrode 122 is interlacing, and the coupling effect of fringe field is strong, therefore the voltage signal detected is strong, beneficial to judgement below.
Referring to Fig. 6, can apply drive signal to rows of sensor electrode 122 in other example, and n
=3, c=1, in other words the sub-step of detecting step be：
Drive signal is applied to the sensor electrode 122 of 3k+1 rows；
Detect the induced signal of the sensor electrode 122 in addition to 3k+1 rows；
Driving letter is applied to a line (such as 3k+2 rows) sensor electrode 122 of the sensor electrode 122 in addition to 3k+1 rows
Number；And
Detect the induced signal of the sensor electrode 122 of 3k+1 rows.
It is appreciated that in such example, the row of the sensor electrode 122 of drive signal is applied in by reasonable selection
Number, it is possible to reduce the sum of sensor electrode 122 of detection is applied in, so as to reduce energy consumption.
Certainly, above example is only to embarking on journey or embarking on journey in column or sensor electrode 122 in column applies drive signal
Or drive signal change signal obtains the explanation of the induced signal of all the sensors electrode 122, it should not limit the present invention's
Scope.
Referring to Fig. 8, in the fingerprint sensor 10 of further embodiments of the present invention, electrode 12 is except sensor electrode 122
Also include conductive protection element 124 outside.Multiple void regions 127, the multiple sensing are set on the conductive protection element 124
Device electrode 122 is separately positioned among the void region 127, and there is gap between the conductive protection element 124, with
Allow the two to insulate.
It is preferred that the conductive protection element 124 is structure as a whole, and it is located at same layer with the sensor electrode 122.
The conductive protection element 124 or multiple protection rings, the multiple protection ring are passed around the multiple respectively
Sensor electrode 122 is set.The multiple protection ring can be single cyclic structure, or be interconnected with one another the knot being integrated
Structure.So, the structure of the conductive protection element 124 does not limit to structure described here, or other suitable structures.
Detecting step includes following sub-step：
Drive signal is applied to conductive protection element 124；And
The induced signal of detection sensor electrode 122.
In some embodiments, above-mentioned sub-step can be realized by detection module 22, that is to say, detection module 22 can
For applying the induced signal of drive signal and detection sensor electrode 122 to conductive protection element 124.
Please refer to Fig. 3 and Fig. 4 in the lump again, specifically, the drive module 221 connects the conductive protection element 124, carries
The conductive protection element 124 is given for the drive signal.The receiving module 223 connects the multiple sensor electrode 122,
Receive the sensing signal exported from sensor electrode 122.
The sensing signal that the judge module 24 is received according to the receiving module 223 determines whether sensor electrode
122 existing defects.
In the present embodiment, when performing defects detection to sensor electrode 122, the conductive protection element 124 and institute
State the multiple formation of sensor electrode 122 mutual capacitance.
Similar foregoing, the detection means 20 can be integrated in the fingerprint sensor 10 of present embodiment, or independent
Device outside the fingerprint sensor 10.
The fingerprint sensor 10 further comprises foregoing fingerprint sensing circuit.The fingerprint sensing circuit is used to drive
The multiple sensor electrode 122 performs self-tolerant fingerprint sensing.The fingerprint sensing circuit provides pumping signal to sensor
Electrode 122 simultaneously receives the fingerprint sensing signal exported from sensor electrode 122, so as to obtain finger print information.
Conductive protection element 14 is grounded in 10 fingerprint sensing of fingerprint sensor, be sensor electrode 122 play electrostatic prevent
The effect of shield.The ground signalling voltage of the ground is usually 0 volt or 0 volt or so, generally using the fingerprint sensor 10
Electronic equipment 100 (seeing below) equipment.It should be noted that the conductive protection element 14 can directly or indirectly connect
Ground.
When the conductive protection element 14 is indirect earthed, the conductive protection element 14 is for example directly connected to a reference
Ground (not shown), the reference ground by a modulation circuit (not shown) with being connected to the equipment.Letter in the reference ground
Number for change signal, be, for example, the modulated signal from the modulation circuit.The modulation circuit is according to equipment ground
Ground signalling corresponding with a voltage drive signals produce the modulated signal.
It is appreciated that in these embodiments, being detected using protection ring 124, deduplication can be saved and apply driving
The step of signal, so as to improve detection efficiency.
Referring to Fig. 9, structural representations of the Fig. 9 for an embodiment of electronic equipment of the present invention.The electronic equipment 100
Fingerprint sensor 10 including any of the above-described embodiment.
Specifically, electronic equipment 100 is as being portable electronic product or household formula electronic product or vehicle electronics product.
However, the electronic equipment does not limit to listed electronic product, other suitable electronic products are can also be.The portable electricity
Sub- product is, for example, mobile terminal, and the mobile terminal is, for example, mobile phone, tablet personal computer, notebook computer, Wearable product etc.
Suitable mobile terminal.The household formula electronic product is, for example, the suitable family such as intelligent door lock, TV, refrigerator, desktop computer
Occupy formula electronic product.The vehicle electronics product is, for example, that Vehicular display device, drive recorder, navigator, car refrigerator etc. are closed
Suitable vehicle electronics product.
In some embodiments, electronic equipment 100 includes housing 104, and fingerprint sensor 10 is located in housing 104, shell
Body 104 offers through hole 106, the exposure fingerprint sensor 10 of through hole 106.
Therefore, through hole 106 can help to the positioning of finger and fingerprint sensor 10 during user's typing fingerprint, facilitate user to grasp
Make.In the present example, through hole 106 is manhole, it will be understood that through hole 106 is alternatively other shapes such as square, oval
The through hole of shape.Through hole 106 can be opened in the back position of housing 104.
The fingerprint sensor 10 may also be arranged on the suitable position such as the front or side of electronic equipment 100.Further
Ground, the fingerprint sensor 10 may also be arranged on the inside of electronic equipment 100, and not necessarily expose fingerprint sensing by through hole
Device 10.
In the description of embodiments of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length
Degree ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ",
The orientation or position relationship of the instruction such as " outer ", " clockwise ", " counterclockwise " are based on orientation shown in the drawings or position relationship, only
It is to be described for the ease of description embodiments of the present invention with simplified, rather than indicates or imply that the device or element of meaning are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to embodiments of the present invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance or implicit
Indicate the quantity of indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed or impliedly wrap
Include one or more feature.In the description of embodiments of the present invention, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
, it is necessary to illustrate in the description of embodiments of the present invention, unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；It can be mechanical connection or electrical connection or can mutually communicate；Can be joined directly together, can also lead to
Cross intermediary to be indirectly connected to, can be connection or the interaction relationship of two elements of two element internals.For ability
For the those of ordinary skill in domain, it can understand that above-mentioned term in embodiments of the present invention specific contains as the case may be
Justice.
In embodiments of the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it
" on " or it " under " can directly be contacted including the first and second features, it is not directly to connect that can also include the first and second features
Touch but pass through the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature directly over second feature and oblique upper, or to be merely representative of fisrt feature level height special higher than second
Levy.Fisrt feature second feature " under ", " lower section " and " below " include fisrt feature directly over second feature and tiltedly on
Side, or fisrt feature level height is merely representative of less than second feature.
Following disclosure provides many different embodiments or example is used for realizing embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, hereinafter the part and setting of specific examples are described.When
So, they are only merely illustrative, and purpose does not lie in the limitation present invention.In addition, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition are for purposes of simplicity and clarity, itself not indicate to be begged for
By the relation between various embodiments and/or setting.In addition, the various specific techniques that embodiments of the present invention are provided
With the example of material, but those of ordinary skill in the art can be appreciated that the application of other techniques and/or making for other materials
With.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means the tool with reference to the embodiment or example description
Body characteristicses, structure, material or feature are contained at least one embodiment of the present invention or example.In this manual,
Identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.Moreover, the specific features of description, knot
Structure, material or feature can in an appropriate manner be combined in any one or more embodiments or example.
Any process or the method description otherwise described in flow chart or herein is construed as, and represents to include
Module, fragment or the portion of the code of one or more executable instructions for the step of realizing specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by shown or discussion suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
The logic and/or step for representing or otherwise describing herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, it may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system of such as computer based system including processing module or it is other can be from instruction
The system of execution system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any can include, store, communicating, propagating or
Transmission procedure uses for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Device.The more specifically example (non-exhaustive list) of computer-readable medium includes following：With one or more wirings
Electrical connection section (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, can even is that can be in the paper of printing described program or other suitable thereon for computer-readable medium
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
Its suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of embodiments of the present invention can be with hardware, software, firmware or combinations thereof come real
It is existing.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution system
The software or firmware of execution is realized.If for example, being realized with hardware, with another embodiment, ability can be used
Any one of following technology known to domain or their combination are realized：With for realizing logic function to data-signal
The discrete logic of logic gates, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Rapid to can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in various embodiments of the present invention can be integrated in a processing module, also may be used
To be that unit is individually physically present, can also two or more units be integrated in a module.It is above-mentioned integrated
Module can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module
If being realized using in the form of software function module and as independent production marketing or in use, a calculating can also be stored in
In machine read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
Although embodiments of the present invention have been shown and described above, it is to be understood that above-mentioned embodiment is
Exemplary, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be right
Above-mentioned implementation is implemented be changed, change, replacing and modification.
Claims (15)
1. a kind of detection means, for detecting fingerprint sensor, it is characterised in that the fingerprint sensor includes electrode, described
Electrode includes sensor electrode and the conductive protection element around the sensor electrode, and the detection means includes：
Drive module, is connected with the conductive protection element, for providing drive signal to the conductive protection element；
Receiving module, is connected with the sensor electrode, for receiving the sensing signal exported from sensor electrode；
Judge module, is connected with the receiving module, for judging the sensor according to the induced signal of the receiving module
Electrode whether there is defect.
2. detection means as claimed in claim 1, it is characterised in that the detection means is using mutual capacitance type principle to the electricity
Pole is driven and sensed.
3. a kind of fingerprint sensor, it is characterised in that：Including：
Electrode, including sensor electrode and the protection ring around the sensor electrode；
Detection means, including：
Detection module, including drive module and receiving module, wherein, the drive module is connected with the protection ring, described to connect
Receive module to be connected with the sensor electrode, the drive module is used to provide drive signal to the protection ring, the reception
Module is used to receive the induced signal from the sensor electrode；And
Judge module, judges that the sensor electrode whether there is for the induced signal received according to the receiving module
Defect.
4. fingerprint sensor as claimed in claim 3, it is characterised in that the detection means detection sensor electrode whether
During existing defects, the sensor electrode and protection ring formation mutual capacitance.
5. fingerprint sensor as claimed in claim 3, it is characterised in that the protection ring is located at same with the sensor electrode
One layer.
6. fingerprint sensor as claimed in claim 5, it is characterised in that the electrode includes multiple sensor electrodes and multiple
Protection ring, the multiple sensor electrode is arranged in two-dimensional array, and the multiple protection ring is connected as one, is arranged on described many
In gap between individual sensor electrode.
7. fingerprint sensor as claimed in claim 3, it is characterised in that the fingerprint sensor is in detection sensor electrode
It is mutual capacitance type fingerprint sensor during no existing defects.
8. fingerprint sensor as claimed in claim 7, it is characterised in that the fingerprint sensor further comprises fingerprint sensing
Circuit, the fingerprint sensing circuit is used to drive the multiple sensor electrode to perform fingerprint sensing, and the fingerprint sensor exists
It is self-tolerant fingerprint sensor when performing fingerprint sensing.
9. fingerprint sensor as claimed in claim 8, it is characterised in that when the multiple sensor of fingerprint sensing circuit drives
When electrode performs fingerprint sensing sensing, the protection ring is connected directly or indirectly to ground, for static electricity discharge.
10. fingerprint sensor as claimed in claim 8, it is characterised in that the fingerprint sensor is a chip, the electrode
It is integrated in the chips with the detection means.
11. a kind of fingerprint sensor, it is characterised in that：Including：
Electrode, including multiple sensor electrodes and a conductive protection element, wherein, multiple engrave is set on the conductive protection element
Dummy section, the multiple sensor electrode is separately positioned among the void region；
Detection means, including：
Detection module, including drive module and receiving module, wherein, the drive module is connected with the conductive protection element,
The receiving module is connected with the sensor electrode, and the drive module gives conductive protection member for providing drive signal
Part, the receiving module is used to receive the induced signal from the sensor electrode；And
Judge module, judges that the sensor electrode whether there is for the induced signal received according to the receiving module
Defect.
12. fingerprint sensor as claimed in claim 11, it is characterised in that the fingerprint sensor is in detection sensor electrode
It is mutual capacitance type fingerprint sensor during with the presence or absence of defect.
13. the fingerprint sensor as described in claim 11 or 12, it is characterised in that the fingerprint sensor further comprises referring to
Line sensing circuit, the fingerprint sensing circuit is used to drive the multiple sensor electrode to perform fingerprint sensing, and the fingerprint is passed
Sensor is self-tolerant fingerprint sensor when performing fingerprint sensing.
14. fingerprint sensor as claimed in claim 13, it is characterised in that when the multiple sensing of fingerprint sensing circuit drives
When device electrode performs fingerprint sensing sensing, the protection ring is connected directly or indirectly to ground, for static electricity discharge.
15. the fingerprint sensor in a kind of electronic equipment, including claim 3-14 described in any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424287.XA CN106971137B (en) | 2016-06-15 | 2016-06-15 | Detection device of fingerprint sensor, fingerprint sensor and electronic equipment |
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| Publication Number | Publication Date |
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| CN106971137A true CN106971137A (en) | 2017-07-21 |
| CN106971137B CN106971137B (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610424287.XA Active CN106971137B (en) | 2016-06-15 | 2016-06-15 | Detection device of fingerprint sensor, fingerprint sensor and electronic equipment |
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| CN (1) | CN106971137B (en) |
| WO (1) | WO2017215496A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| CN109062430A (en) * | 2018-07-12 | 2018-12-21 | 昆山国显光电有限公司 | Display panel and its display device |
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| 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 |
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| CN106971137B (en) | 2024-01-12 |
| WO2017215496A1 (en) | 2017-12-21 |
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