CN106415600A

CN106415600A - Bioinformation sensing device and electronic equipment

Info

Publication number: CN106415600A
Application number: CN201680000681.9A
Authority: CN
Inventors: 李问杰
Original assignee: Shenzhen Sunwave Technology Co Ltd
Current assignee: Liuzhou Zibo Technology Co.,Ltd.
Priority date: 2016-08-09
Filing date: 2016-08-09
Publication date: 2017-02-15
Anticipated expiration: 2036-08-09
Also published as: WO2018027592A1; CN106415600B

Abstract

The invention provides a bioinformation sensing device and electronic equipment. The bioinformation sensing device comprises a plurality sensing electrodes, which are arranged in multiple rows and multiple columns; a drive circuit, which is connected to multiple sensing electrodes for driving the multiple sensing electrodes to execute bioinformation sensing. For the sensing electrodes of the same column, when the drive circuit provides an excitation signal for a sensing electrode to execute bioinformation sensing, a first reference signal is provided for sensing partial or all sensing electrodes among the rest sensing electrodes.

Description

Biological information sensing device and electronic equipment

Technical field

The present invention relates to biological information field of sensing technologies, more particularly, to a kind of biological information sensing device and there is institute State the electronic equipment of biological information sensing device.

Background technology

At present, biological information sensing device is increasingly becoming the standard configuration of electronic equipment, and for example, increasing mobile terminal is adopted With fingerprint sensing device, face recognition sensing device, eyeprint recognition sensor etc..Generally, described biological information sensing dress Put the drive circuit be connected including multiple sensing electrodes in array arrangement and with each sensing electrode.Described drive circuit The general sensing electrode execution biological information sensing of driving line by line.

So, for the sensing electrode of same row：When described drive circuit provides pumping signal to a sensing electrode, drive institute When stating sensing electrode execution biological information sensing, described drive circuit does not provide voltage signal to remaining sensing electrode, remaining Voltage in sensing electrode is inconsistent because the impacts such as signal interference can exist, therefore in execution biological information sensing Sensing electrode parasitic effects different and be all unknown, and biological information sensing device is to sensing required precision relatively Height, thus be unfavorable for the accurate detection of biological information.

Content of the invention

It is contemplated that at least solving one of technical problem present in prior art.For this reason, the present invention needs to provide one Plant biological information sensing device and electronic equipment.

The present invention provides a kind of biological information sensing device, including：

Multiple sensing electrodes, arrange in multiple lines and multiple rows；

Drive circuit, is connected with the plurality of sensing electrode, for driving the plurality of sensing electrode execution biological information Sensing；

Sensing electrode for same row：When described drive circuit provides pumping signal to the biological letter of a sensing electrode execution During breath sensing, provide one first reference signal to the part or all of sensing electrode in remaining sensing electrode.

Alternatively, described first reference signal is identical with described pumping signal.

Alternatively, for the sensing electrode of same a line：When described drive circuit provides pumping signal to hold to a sensing electrode During row biological information sensing, provide one second reference signal to another sensing electrode.

Alternatively, described second reference signal is identical with described first reference signal.

Alternatively, for the sensing electrode of same a line：Described drive circuit provides pumping signal to section senses electricity simultaneously Pole execution biological information sensing, and provide described second reference signal to the part or all of sensing electricity in remaining sensing electrode Pole.

Alternatively, for the sensing electrode of same a line：Described drive circuit simultaneously drives section senses electrode to execute every time Biological information senses, and is driven by multiple, until having driven a line sensing electrode execution biological information sensing.

Alternatively, when described drive circuit is when providing described pumping signal to sensing electrode, receive self-induction further Survey the sensing signal of electrode output, sensed with the biological information executing self-capacitance.

Alternatively, described biological information sensing device includes multiple sensing units, and described sensing unit includes：

Described sensing electrode；

First controlling switch, is connected with described sensing electrode；With

Second controlling switch, is connected with described sensing electrode；

Described drive circuit includes：

The first controlling switch in scan drive circuit, with the plurality of sensing unit and the second controlling switch connect respectively Connect, for driving the first controlling switch and the second controlling switch timesharing conducting in same sensing unit；

Sensing drive circuit, is connected with described sensing electrode by described first controlling switch, for the by turning on One controlling switch provides described pumping signal to sensing electrode execution biological information sensing；With

Reference signal generation circuit, is connected with described sensing electrode by described second controlling switch, for by conducting Second controlling switch provide described first reference signal to sensing electrode.

Alternatively, for same row sensing electrode：

When the first controlling switch conducting in described scan drive circuit driving wherein one sensing unit, the second controlling switch During cut-off, drive the first controlling switch cut-off, second controlling switch of part or all of sensing unit in remaining sensing unit Conducting, the second controlling switch that described reference signal generation circuit passes through conducting provides described first reference signal to sensing electricity Pole.

Alternatively, the first controlling switch that described sensing drive circuit passes through conducting provides described pumping signal to sensing electricity Pole execution biological information sensing, and receive the sensing signal from sensing electrode output, to obtain biological information.

Alternatively, when described scan drive circuit drives the first controlling switch conducting, second control of a line sensing unit During switch cut-off, the first controlling switch that described sensing drive circuit passes through conducting provides described pumping signal to feel to part simultaneously Survey electrode execution biological information sensing, the first controlling switch that described reference signal generation circuit passes through conducting provides same second Reference signal gives the sensing electrode of the part or all of sensing unit in remaining sensing unit.

Alternatively, described drive circuit further includes multiple data selectors, and the plurality of data selector connects institute State reference signal generation circuit and described sensing drive circuit, each data selector passes through the first controlling switch further and connects The sensing electrode of part sensing unit, described data selector is used for selecting to export described pumping signal or described second with reference to letter Number give sensing electrode.

Alternatively, described drive circuit once exports described pumping signal respectively to a sense by each data selector simultaneously Survey electrode execution biological information sensing, and by each data selector export respectively described second reference signal to a line its Part or all of sensing electrode in remaining sensing electrode.

Alternatively, described biological information sensing device further includes control unit, described control unit and described scanning Drive circuit and the plurality of data selector connect respectively, for controlling described scan drive circuit to drive each row sensing unit In the first controlling switch and the second controlling switch conducting sequential, and by control the plurality of data selector control Export the described pumping signal and described second reference signal sequential to sensing electrode.

Alternatively, described biological information sensing device further includes：

Multiple scan line groups, described scan line group includes the first scan line and the second scan line；With

Multiple data wire groups, described data wire group includes the first data wire and the second data wire；

Every scan line group connects a line sensing unit, and each data wire group connects a row sensing unit；

Described first controlling switch includes coordination electrode, the first transmission electrode and the second transmission electrode；Described second control Switch includes coordination electrode, the first transmission electrode and the second transmission electrode；Described first scan line connects described turntable driving electricity Road and the coordination electrode of described first controlling switch；Described second scan line connects described scan drive circuit and described second control The coordination electrode of system switch；Described first data wire connects the first transmission electricity of described data selector and the first controlling switch Pole；Described second data wire connects the first transmission electrode of described reference signal generation circuit and the second controlling switch；Described Second transmission electrode of one controlling switch connects described sensing electrode；Second transmission electrode of described second controlling switch connects institute State sensing electrode.

Alternatively, described first data wire is used for transmitting described pumping signal and described second reference signal, and described second Data wire is used for transmitting described first reference signal, and described scan drive circuit is by described first scan line, the second scan line There is provided scanning open signal to the first controlling switch and the second controlling switch, to control the first controlling switch and the second controlling switch Conducting, provides scanning pick-off signal to control to the first controlling switch and second by described first scan line, the second scan line and opens Close, to control the first controlling switch and the cut-off of the second controlling switch.

First reference signal line, connects described reference signal generation circuit and the second data wire, for transmitting described first Reference signal；

Second reference signal line, connects described reference signal generation circuit and the plurality of data selector, for transmitting Described second reference signal；With

Sensing signal line, connects described sensing drive circuit and the plurality of data selector, for transmitting described excitation Signal gives sensing drive circuit to sensing electrode and transmission from the sensing signal of sensing electrode.

Alternatively, described biological information sensing device includes biometric information sensor, and described biometric information sensor includes Insulated substrate, the plurality of sensing unit, the plurality of scan line group, the plurality of data wire group and described first ginseng Examine holding wire, the plurality of sensing unit, the plurality of scan line group, the plurality of data wire group and described first ginseng Examine holding wire to be formed on described insulated substrate.

Alternatively, the first controlling switch in described each sensing unit and the second controlling switch are thin film transistor (TFT) and open Close, described insulated substrate is glass substrate.

Alternatively, described sensing unit includes one first controlling switch and one second controlling switch, or, described sensing unit Including 2 first controlling switches being connected in parallel and 2 second controlling switches being connected in parallel.

Alternatively, described insulated substrate includes first surface and the second surface being oppositely arranged with first surface, and described One surface is used for receiving the touch of target object or close to input, the plurality of sensing unit, the plurality of scan line group, institute State multiple data wire groups and described first reference signal line is arranged on described second surface.

Alternatively, the sensing electrode of the plurality of sensing unit is compared to described first controlling switch, described second control Switch, the plurality of scan line group and the plurality of data wire group are closer to described second surface.

Alternatively, described first controlling switch, described second controlling switch, the plurality of scan line group and described many Individual data line-group group is located at the side of the sensing electrode of the plurality of sensing unit back to described insulated substrate.

Alternatively, the sensing electrode of the plurality of sensing unit covers described first controlling switch, described second control is opened Pass, the plurality of scan line group and the plurality of data wire group.

Alternatively, described biometric information sensor further includes that described scan drive circuit, the plurality of data select Device, described second reference signal line and described sensing signal line, described scan drive circuit, the plurality of data selector, institute State the second reference signal line and described sensing signal line is formed on the second surface of described insulated substrate.

Alternatively, described scan drive circuit, the plurality of data selector, described second reference signal line and described Sensing signal line is arranged on around the plurality of sensing unit.

Alternatively, described scan drive circuit and the plurality of data selector all include controlling switch, and described control is opened Pass is thin film transistor switch.

Alternatively, each data selector includes multiple switch unit, each switch element include first choice switch and Second selecting switch, described first choice switch includes coordination electrode, the first transmission electrode and the second transmission electrode, and described the Two selecting switch include coordination electrode, the first transmission electrode and the second transmission electrode, wherein, the control of described first choice switch The coordination electrode of electrode processed and the second selecting switch is connected respectively with described control unit, the first biography of described first choice switch Transmission pole is connected with described sensing drive circuit, and the first transmission electrode of described second selecting switch is produced with described reference signal Circuit connects, and the second transmission electrode of described first choice switch is connected with the second transmission electrode of described second selecting switch Connect and connect to the first data wire.

Alternatively, described control unit controls first choice switch and the second selecting switch timesharing in same switch element Conducting.

Alternatively, described biometric information sensor further includes passivation layer, is formed at the plurality of sensing unit, described On multiple scan line groups, the plurality of data wire group and described first reference signal line.

Alternatively, described biological information sensing device further includes control chip, and described control chip includes described control Unit processed, described reference signal generation circuit and described sensing drive circuit.

Alternatively, described biometric information sensor and described control chip are respectively nude film, and described control chip is bundled in On described insulated substrate；Or, described control chip is arranged on a flexible circuit board, by described flexible circuit board with described Biometric information sensor electrically connects.

Alternatively, described drive circuit further includes modulation circuit, and described modulation circuit is used for driving described in uniform modulation Dynamic circuit output gives the signal of the plurality of sensing unit, to improve the signal to noise ratio of sensing signal.

Alternatively, described biological information sensing device is the sensing device of self-capacitance.

Alternatively, described biological information sensing device is fingerprint sensing device.

Because the biological information sensing device of the present invention is while driving sensing electrode execution biological information sensing, enter one Step provides the first reference signal to all or part of sensing electrode in remaining sensing electrode of same row, thus applying The sensing electrode stating the first reference signal is to understand to the parasitic effects of the sensing electrode in execution sensing, correspondingly, described Drive circuit can reject knowable parasitic effects during obtaining biological information, thus improving the essence of biological information sensing Degree.

Further, section senses electrode in driving often row sensing electrode for the described biological information sensing device executes life During thing information sensing, provide the second reference signal to all or part of sensing electrode in remaining sensing electrode of same a line, Thus the sensing electrode being applied with described second reference signal is to understand to the parasitic effects of the sensing electrode in execution sensing, Correspondingly, described drive circuit can reject knowable parasitic effects during obtaining biological information, thus improving biological letter The precision of breath sensing.

Alternatively, described biological information sensing device further includes insulated substrate, multiple sensing unit, cover sheet, The plurality of sensing unit is arranged between described insulated substrate and described cover sheet, and described cover sheet is back to the plurality of The side of sensing unit is used for receiving the touch of target object or close to input, and wherein, each sensing unit includes sense described in Survey electrode and the sensing circuit being connected with sensing electrode.

Alternatively, described biological information sensing device further includes insulated substrate, multiple sensing unit, coat, institute State multiple sensing units to be arranged between described insulated substrate and described coat, described coat is single back to the plurality of sensing The side of unit is used for receiving the touch of target object or close to input, and wherein, each sensing unit includes sensing electrode described in And the sensing circuit being connected with sensing electrode.

Alternatively, described sensing circuit includes the first controlling switch and the second controlling switch, all connects with described sensing electrode Connect, wherein, described first controlling switch is used for controlling whether to transmit pumping signal to sensing electrode, and described second controlling switch is used In controlling whether to transmit the first reference signal to sensing electrode, described first controlling switch is led with described second controlling switch timesharing Logical.

The present invention further provides a kind of electronic equipment, described electronic equipment includes the biology described in above-mentioned middle any one Information sensor.

Because described electronic equipment includes described biological information sensing device, therefore, the Consumer's Experience of described electronic equipment Higher.

Brief description

Fig. 1 is the electrical block diagram of biological information sensing device one embodiment of the present invention.

Fig. 2 is the top view of the part-structure of biological information sensing device shown in Fig. 1.

Fig. 3 is that the circuit structure of an embodiment of the data selection circuit of biological information sensing device shown in Fig. 1 is illustrated Figure.

Fig. 4 is the structural representation of another embodiment of biological information sensing device of the present invention.

Fig. 5 is the cut-away section structural representation of biological information sensing device shown in Fig. 4.

Fig. 6 is the use state figure of biological information sensing device shown in Fig. 4.

Fig. 7 is the preparation method flow chart of an embodiment of biometric information sensor shown in Fig. 3.

Fig. 8 is the method flow diagram making the first controlling switch and the second controlling switch.

Fig. 9 is the part-structure schematic diagram of the another embodiment of biological information sensing device of the present invention.

Figure 10 is the top view of another embodiment of sensing unit of biological information sensing device of the present invention.

Figure 11 is the part-structure schematic diagram of the another embodiment of biological information sensing device of the present invention.

Figure 12 is the structural representation of an embodiment of electronic equipment of the present invention.

Figure 13 is the circuit structure block diagram of an embodiment of electronic equipment shown in Figure 12.

Specific embodiment

Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention Specific embodiment be described in detail.However, example embodiment can be implemented in a variety of forms, and it is understood not to limit In embodiment set forth herein；On the contrary, these embodiments are provided so that the present invention will fully and completely, and example be implemented The design of mode comprehensively conveys to those skilled in the art.For convenience or clear, may exaggerate, omit or schematically show Go out thickness and size and the quantity schematically illustrating related elements of shown in the accompanying drawings every layer.In addition, the size of element Not exclusively reflection actual size, and the quantity of related elements not exclusively reflects actual quantity.Because accompanying drawing is of different sizes etc. former Cause, in different drawings the quantity of shown same or similar or related elements there is not consistent situation.In in figure phase Same reference represents same or similar structure.So, it should be noted that so that label has regularity and patrols Collect property etc., in some difference embodiments, same or similar element or structure employ different references, according to technology Relevance and related text explanation, those skilled in the art is directly or indirectly to judge to learn.

Additionally, described feature, structure can combine in one or more embodiments in any suitable manner. In the following description, many details are provided thus being given, embodiments of the present invention to be fully understood.However, ability Field technique personnel will be appreciated that does not have one of described specific detail or more, or adopts other structures, constituent element etc., Technical scheme can also be put into practice.In other cases, known features or operation are not shown in detail or describe to keep away Exempt from the fuzzy present invention.

Further, following term is exemplary it is not intended that being limited by any way.Read the application it Afterwards, it would be recognized by those skilled in the art that the statement of these terms is applied to technology, method, physical component and system (no matter mesh Front whether know), it is inferred to including those skilled in the art after reading the application or its extension educible.

In describing the invention it is to be understood that：" multiple " include two and two or more, " a plurality of " include two With more than two, clearly specifically limit except non-invention separately has." at least two row " include two row, three row, four row, five row etc. by Cumulative many various suitable situations.In addition, the word such as " first ", " second " of occurring in each element title and signal name is simultaneously To limit the sequencing that element or signal occur, but for convenience of element and signal name, clearly distinguish each element with And each signal is so that description is more succinct.

Below, various embodiments of the present invention are illustrated.

See also Fig. 1 and Fig. 2, Fig. 1 is that the circuit structure of biological information sensing device one embodiment of the present invention shows It is intended to.Fig. 2 is the top view of the part-structure of biological information sensing device shown in Fig. 1.Described biological information sensing device 1 includes Multiple sensing electrodes 111 and drive circuit 20.Described drive circuit 20 is connected with the plurality of sensing electrode 111, for driving Dynamic the plurality of sensing electrode 111 execution biological information sensing.Described biological information sensing device 1 is, for example, fingerprint sensing dress Put, the sensing device of the suitable type such as ear line sensing device.

Described biological information sensing device 1 is, for example, capacitive biological information sensing device, alternatively other suitable classes The biological information sensing device of type.

Generally, capacitive sensing device includes the sensing device of mutual capacitance type and the sensing device of self-capacitance.

Different from the matching relationship of sensing electrode 111 according to drive circuit 20, biological information sensing device 1 can be from electricity The biological information sensing device of appearance formula or the biological information sensing device of mutual capacitance type.

In the biological information sensing device based on mutual capacitance type, the biological information sensing device of described mutual capacitance type can wrap Include multiple driving electrodes and multiple sensing electrode.Form mutual capacitance between each driving electrodes and a sensing electrode.In sensing, Drive circuit provides pumping signal to driving electrodes, and receives the sensing signal from sensing electrode output.When target object connects Near or when touching described biological information sensing device, it is formed at the quantity of electric charge meeting of the mutual capacitance between driving electrodes and sensing electrode There is corresponding change, thus, sensing electrode can export corresponding sensing signal to drive circuit, and then obtains associated biomolecule letter Breath.

In the biological information sensing device based on self-capacitance, the biological information sensing device of described self-capacitance includes Multiple sensing electrodes.Each sensing electrode can form electric capacity over the ground.In sensing, drive circuit provides pumping signal to sensing Electrode, and receive the sensing signal from sensing electrode output.When target object approaches or touches described biological information sensing dress When putting, form electric capacity between target object and sensing electrode, cause the change of the quantity of electric charge in sensing electrode, thus, sensing electricity Pole exports corresponding sensing signal to drive circuit, and then obtains relevant biological information.

Described target object is, for example, the proper site on the human body such as finger, toe, ear, but the invention is not limited in This, described target object is alternatively other suitable objects it is not limited to human body, alternatively other live bodies, or even prosthese.

In the present embodiment, described biological information sensing device 1 is, for example, the sensing device of self-capacitance.

The plurality of sensing electrode 111 is arranged in multiple lines and multiple rows mode.So, ground, in other embodiments, institute are changed Stating multiple sensing electrodes 111 also can be in Else Rule or non-regular arrangement.

Sensing electrode 111 for same row：When described drive circuit 20 provides pumping signal to hold to a sensing electrode 111 During row biological information sensing, provide one first reference signal to the part or all of sensing electrode in remaining sensing electrode 111 111.It is preferred that described drive circuit 20 provides described first reference signal to remaining whole sensing electrode 111.

Because described drive circuit 20 is providing described pumping signal to the sensing electrode in each row sensing electrode 111 When 111, provide described first reference signal to remainder or whole sensing electrode 111, thus, it is applied with described first reference The sensing electrode 111 of signal is knowable to the parasitic effects of the sensing electrode 111 in execution biological information sensing, thus, institute State drive circuit 20 and can offset knowable parasitic effects in the follow-up calculating to biological information, and then improve the sense of biological information Survey precision.

Described first reference signal is, for example, constant voltage signal.

Or, the pressure reduction between described first reference signal and described pumping signal keeps constant, for example, described first ginseng Examine that signal is identical with described pumping signal, thus reducing remaining sensing electrode 111 and the sensing electricity in execution biological information sensing The charge/discharge electricity amount of the parasitic capacitance between pole 111, improves the sensing precision of biological information further.

In the present embodiment, described drive circuit 20 drives sensing electrode 111 execution biological information sensing line by line.So, Change ground, in other embodiments, described drive circuit 20 also can once simultaneously drive multirow sensing electrode 111 to execute life Thing information senses.

Further, in the present embodiment, for the sensing electrode 111 of same a line：Described drive circuit 20 carries simultaneously For described pumping signal to section senses electrode 111 execution biological information sensing, and one second reference signal is provided to feel to remaining Survey the part or all of sensing electrode 111 in electrode 111.It is preferred that providing described second reference signal all to sense to remaining Electrode 111.

Sensing electrode 111 for same a line：Described drive circuit 20 passes through successively repeatedly to provide described excitation letter simultaneously Number to section senses electrode 111 execution biological information sensing, thus driven a line sensing electrode 111 execution biological information sense Survey.

When the plurality of sensing electrode 111 is formed on a chip, using the timesharing driving to a line sensing electrode 111 Mode, thus the pin number on described chip can be reduced, in this regard, have related narration below.

So, change ground, in other embodiments, described drive circuit 20 also can simultaneously drive the sensing electrode of a line 111 are performed both by biological information sensing.For example, the plurality of sensing electrode 111 is formed in display screen.When the plurality of sensing When electrode 111 is arranged on chip, described drive circuit is also to simultaneously drive the sensing electrode 111 of a line to be performed both by biological letter Breath sensing.

Further, since described drive circuit 20 is providing described pumping signal to the part sense in each row sensing electrode 111 When surveying electrode 111, provide described second reference signal to the part or all of sensing electrode 111 in remaining sensing electrode 111, from And, the sensing electrode 111 being applied with described second reference signal is to the parasitism in the sensing electrode 111 executing biological information sensing Impact is knowable, thus, described drive circuit 20 can offset knowable parasitic effects in the follow-up calculating to biological information, And then improve the sensing precision of biological information.

Described second reference signal is, for example, constant voltage signal.

Or, the pressure reduction between described second reference signal and described pumping signal keeps constant, for example, described second ginseng Examine that signal is identical with described pumping signal, thus reducing remaining sensing electrode 111 and the sensing electricity in execution biological information sensing The charge/discharge electricity amount of the parasitic capacitance between pole 111, improves the sensing precision of biological information further.

In some embodiments, described biological information sensing device 1 includes multiple sensing units 11.Each sensing Unit 11 includes sensing electrode 111 described in, the first controlling switch 113 and the second controlling switch 115.Described first control is opened Close 113, described second controlling switch 115 to be all connected with described sensing electrode 111.

Described drive circuit 20 includes scan drive circuit 21, sensing drive circuit 22 and reference signal generation circuit 23. The first controlling switch 113 in described scan drive circuit 21 and the plurality of sensing unit 11 and 115 points of the second controlling switch Do not connect, for driving the first controlling switch 113 and the second controlling switch 115 timesharing conducting in each sensing unit 11.Institute State sensing drive circuit 22 to be connected with sensing electrode 111 by the first controlling switch 113 in each sensing unit 11, be used for passing through First controlling switch 113 of conducting provides described pumping signal to sensing electrode 111 execution biological information sensing.Described reference letter Number produce circuit 23 be connected with described sensing electrode 111 by the second controlling switch 115 in each sensing unit 11, be used for passing through Second controlling switch 115 of conducting provides described first reference signal to sensing electrode 111.

Sensing electrode 111 for same row：When described scan drive circuit 21 drives first in a sensing unit 11 When controlling switch 113 turns on, the second controlling switch 115 is ended, drive the part or all of sensing list in remaining sensing unit 11 First controlling switch 113 of unit 11 is ended, the second controlling switch 115 turns on, and described reference signal generation circuit 23 passes through conducting The second controlling switch 115 provide described first reference signal to sensing electrode 111.

The first controlling switch 113 that described sensing drive circuit 22 passes through conducting provides described pumping signal to sensing electrode 111 execution biological information sensings, and receive the sensing signal from sensing electrode 111 output, to obtain biological information.

Further, when described scan drive circuit 21 drive a line sensing unit 11 the first controlling switch 113 turn on, During the second controlling switch 115 cut-off, the first controlling switch 113 that described sensing drive circuit 22 passes through to turn on provides described simultaneously Pumping signal passes through the of conducting to section senses electrode 111 execution biological information sensing, described reference signal generation circuit 23 One controlling switch 113 provides described second reference signal to the sense of the part or all of sensing unit 11 in remaining sensing unit 11 Survey electrode 111.

In the present embodiment, described drive circuit 20 can further include data selection circuit 24, and described data selects Circuit 24 is connected respectively with described sensing drive circuit 22 and described reference signal generation circuit 23.Described data selection circuit 24 It is connected with the first controlling switch 113 in each sensing unit 11 further.For each sensing unit 11, selected by described data Circuit 24 is selecting to export the second reference signal of being provided of described reference signal generation circuit 23 or to export described sensing The pumping signal that drive circuit 22 is provided is to sensing electrode 111.When described data selection circuit 24 exports described pumping signal During to a sensing electrode 111, export the sensing signal that described sensing electrode 111 sensed further to described drive circuit 20.

Because described drive circuit 20 is provided with described data selection circuit 24, such that it is able to realize the sensing electricity to each row Pole 111 carries out timesharing execution biological information sensing.

In one embodiment, described data selection circuit 24 includes multiple data selectors (Multiplexer) 241. Each data selector 241 coupling part sensing unit 11, and further with described reference signal generation circuit 23 and described sense Survey drive circuit 22 to connect respectively.The plurality of data selector 241 is used for selecting output described pumping signal or described second Reference signal is to sensing electrode 111.Alternatively, each data selector 241 connects at least two row sensing units 11.

Described drive circuit 20 once exports described pumping signal to a sensing by each data selector 241 simultaneously respectively Electrode 111 execution biological information sensing, and described second reference signal is exported respectively to same a line by each data selector 241 Remaining sensing electrode 111 in part or all of sensing electrode 111.

Described drive circuit 20 passes through successively repeatedly to pass through each data selector 241 simultaneously and the first control of conducting is opened Close 113 and export described pumping signal to sensing electrode 111, to have driven a line sensing electrode 111 execution biological information sensing.

Change ground, in other embodiments, described data selection circuit 24 is alternatively other suitable circuit knots Structure is it is not limited to multiple data selectors 241 described herein.In addition, when described drive circuit 20 provide simultaneously described swash When encouraging signal to the sensing electrode 111 often gone, described data selection circuit 24 may also be omission.

Described drive circuit 20 can further include control unit 30.Described control unit 30 and described scan drive circuit 21 and the plurality of data selector 241 connect respectively, for controlling described scan drive circuit 21 to drive each row sensing unit The first controlling switch 113 in 11 and the conducting sequential of the second controlling switch 115, and selected by controlling the plurality of data Device 241 is controlling the sequential exporting described pumping signal and described second reference signal to sensing electrode 111.

For example, described control unit 30 controls described scan drive circuit 21 to turn on the first controlling switch 113 line by line, and When controlling first controlling switch 113 of each row sensing unit 11 to turn on, control the sensing of partly going in remaining row or whole row Second controlling switch 115 of unit 11 turns on.For same sensing unit 11：Described control unit 30 controls described turntable driving Circuit 21 timesharing turns on the first controlling switch 113 and the second controlling switch 115.

Described control unit 30 controls the described data selector 241 timesharing described pumping signal of output to give described data choosing Select each sensing unit 11 that device 241 is connected.

In some embodiments, described biological information sensing device 1 for example further include multiple scan line group B and Multiple data wire group D.Every scan line group B connects a line sensing unit 11, and each data wire group D connects a biographies sense Unit 11.

Specifically, every scan line group B includes the first scan line B1 and the second scan line B2.Each data wire group D Including the first data wire D1 and the second data wire D2.

Described first controlling switch 113 includes coordination electrode G1, the first transmission electrode S11 and the second transmission electrode S12. Described second controlling switch 115 includes coordination electrode G2, the first transmission electrode S21 and the second transmission electrode S22.Described first Scan line B1 connects coordination electrode G1 of described scan drive circuit 21 and described first controlling switch 113.Described second scanning Line B2 connects coordination electrode G2 of described scan drive circuit 21 and described second controlling switch 115.Described first data wire D1 Connect the first transmission electrode S11 of described data selector 241 and the first controlling switch 113.Described second data wire D2 connects Described reference signal generation circuit 23 and the first transmission electrode S21 of the second controlling switch 115.Described first controlling switch 113 Second transmission electrode S12 connect described sensing electrode 111.Second transmission electrode S22 of described second controlling switch 115 connects Described sensing electrode 111.

Described first data wire D1 is used for transmitting described pumping signal and described second reference signal, described second data wire D2 is used for transmitting described first reference signal, and described scan drive circuit 21 is by described first scan line B1, the second scan line B2 provides scanning open signal to the first controlling switch 113 and the second controlling switch 115, to control the first controlling switch 113 He Second controlling switch 115 turns on, and provides scanning pick-off signal to the first control by described first scan line B1, the second scan line B2 System switch 113 and the second controlling switch 115, to control the first controlling switch 113 and the second control to open 115 passes cut-offs.

Described first scan line B1 and the second scan line B2 all extend, in the row direction along column direction arrangement.Described first number All extend, arrange in the row direction along column direction according to line D1 and described second data wire D2.

In some embodiments, described biological information sensing device 1 for example further include the first reference signal line R1, Second reference signal line R2 and sensing signal line L.Described first reference signal line R1 connects described reference signal generation circuit 23 With the second data wire D2, for transmitting described first reference signal.Described second reference signal line R2 connects described reference signal Produce circuit 23 and the plurality of data selector 241, for transmitting described second reference signal.Described sensing signal line L is even Connect described sensing drive circuit 22 and the plurality of data selector 241, for transmitting described pumping signal to sensing electrode 111 And transmission is derived from the sensing signal of sensing electrode 11 to sensing drive circuit 22.

Described first reference signal line R1, the second reference signal line R2 and sensing signal line L mainly extend in the row direction.

Refer to Fig. 3, Fig. 3 is that the circuit structure of the embodiment of data selector 241 shown in Fig. 1 of the present invention is illustrated Figure.Described data selector 241 includes 8 switch elements 243, each switch element 243 include one first choice switch S1 and One second selecting switch S2.Described first choice switch S1 includes coordination electrode G3, the first transmission electrode S31 and second transmission Electrode S32.Described second selecting switch S2 includes coordination electrode G4, the first transmission electrode S41 and the second transmission electrode S42.Institute State control unit 30 to be connected respectively with coordination electrode G3 in each switch element 243 and coordination electrode G4.Described first transmission Electrode S31 is connected with described sensing drive circuit 22.Described first transmission electrode S41 is with described reference signal generation circuit 23 even Connect.The second transmission electrode S32 in each switch element 243 and the second transmission electrode S42 is connected, and connects to the first control First transmission electrode S11 of system switch 113.

For same switch element 243：Described control unit 30 controls described first choice switch S1 and second to select to open Close S2 timesharing conducting, i.e. when first choice switch S1 conducting, the second selecting switch S2 cut-off, when the second selecting switch S2 is led When logical, first choice switch S1 cut-off.For same data selector 241：When described control unit 30 controls a switch element When the first choice switch S1 conducting in 243, the second selecting switch S2 cut-off, control the first choosing in rest switch unit 243 Select switch S1 cut-off, the second selecting switch S2 conducting.S1 is switched by the first choice of conducting, described sensing drive circuit 22 carries The sensing electrode 111 of the sensing unit 11 turning on for described pumping signal to the first controlling switch 113；By the second choosing of conducting Select switch S2, described reference signal generation circuit 23 provides the biography that described second reference signal turns on to the second controlling switch 115 The sensing electrode 111 of sense unit 11.

In the present embodiment, the quantity of the plurality of data selector 241 for example, 16, each data selector 241 include 8 switch elements 243.Accordingly, it is 128 with the quantity of the sensing electrode 111 of a line.

It should be noted that in FIG, being limited to the size of accompanying drawing, Fig. 1 only illustrates each data selector 241 respectively It is connected with two row sensing units 11, if corresponding with the structure of the data selector 241 shown in Fig. 3, Fig. 1 actually eliminates often The structure that one data selector 241 is also connected with other six row sensing units 11.In addition, the structure of Fig. 4 described later and Fig. 1 institute The structure shown is corresponding, equally eliminates the structure that each data selector 241 is also connected with other six row sensing units 11, Explain in this together.

Correspondingly, described drive circuit 20 for example exports 16 by described 16 data selectors 241 every time simultaneously and swashs Encourage signal to correspond to 16 sensing electrodes 111 with a line, and 112 the second reference signals of output simultaneously correspond to a line 112 sensing electrodes 111.

Be as a example fingerprint sensing device by described biological information sensing device 1, when the finger of user approach or touch described During the sensing electrode 111 of multiple sensing units 11, because ridge, paddy are different from the distance of sensing electrode 111, therefore, ridge, paddy and sense Survey the corresponding difference of electric capacity that electrode 111 is formed respectively, thus the impact to the quantity of electric charge in sensing electrode 111 is just different, from And drive circuit 20 can know corresponding finger print information according to the sensing signal of sensing electrode 111 output.

The operation principle of described biological information sensing device 1 one embodiment is as follows.

Described control unit 30 controls the first choice in the switch element 243 in each data selector 241 to switch S1 Conducting, the second selecting switch S2 cut-off, control the first choice in the rest switch unit 243 in each data selector 241 to open Close S1 cut-off, the second selecting switch S2 conducting, correspondingly, described sensing drive circuit 22 passes through to lead in each data selector 241 Logical first choice switch S1 provides described pumping signal to the first data wire D1, and described reference signal generation circuit 23 passes through In each data selector 241, the second selecting switch S2 of conducting provides described second reference signal to the first data wire D1.Logical Cross many secondary control of described control unit 30, the first choice in each switch element 243 in described each data selector 241 is opened Close S1 timesharing conducting.

Described control unit 30 controls described scan drive circuit 21 to drive the first controlling switch 113 to turn on line by line, second Controlling switch 115 is ended, and turn in the first controlling switch 113 controlling each row respectively, the second controlling switch 115 cut-off same When, the first controlling switch 113 of control remaining row is ended, the second controlling switch 115 turns on, correspondingly, described first data wire The first controlling switch 113 that pumping signal on D1 passes through conducting exports to sensing electrode 111, and receives from sensing electrode The sensing signal of 111 outputs, to execute biological information sensing, the second reference signal on described first data wire D1 passes through conducting The first controlling switch 113 export to sensing electrode 111, in addition, described reference signal generation circuit 23 pass through conducting second Controlling switch 115 provides described first reference signal to sensing electrode 111.

By when each drive part sensing electrode 111 executes biological information sensing, providing the first reference signal and the Two reference signals give remaining corresponding sensing electrode 111, to improve the sensing of the biological information of described biological information sensing device further 1 Precision.

See also Fig. 1, Fig. 4 to Fig. 6, Fig. 4 is the knot of another embodiment of biological information sensing device of the present invention Structure schematic diagram.Fig. 5 is the cut-away section structural representation of biological information sensing device shown in Fig. 4.Fig. 6 is biological letter described in Fig. 4 The use state figure of breath sensing device.Described biological information sensing device 1 includes biometric information sensor 2.Described biological information Sensor 2 includes insulated substrate 2a, the plurality of sensing unit 11, the plurality of scan line group B, the plurality of data line-group Group D and described first reference signal line R1.The plurality of sensing unit 11, the plurality of scan line group B, the plurality of number It is formed on described insulated substrate 2a according to line-group group D and described first reference signal line R1.

In the present embodiment, the first controlling switch 113 in described each sensing unit 11 and the second controlling switch 115 As being thin film transistor (TFT) (Thin Film Transistor, TFT) switch, described insulated substrate 2a is, for example, glass substrate, Thus, described biometric information sensor 2 is made using the technique forming TFT switch on glass substrate, and then reduces biological letter Breath sensor 2 and the manufacturing cost including described biometric information sensor 2.When described first controlling switch 113, second When controlling switch 115 is thin film transistor switch, described coordination electrode G1, G2 is grid, described first transmission electrode S11, S21 For source electrode, described second transmission electrode S12, S22 is drain electrode.

So, the present invention is not intended to limit described insulated substrate 2a is glass substrate, the insulation base of alternatively other suitable type Plate, equally, does not limit described first controlling switch 113 yet and described second controlling switch 115 is thin film transistor switch, Can be the switch of other suitable type.

Described thin film transistor switch is, for example, low temperature polycrystalline silicon (LTPS) thin film transistor switch, indium gallium zinc (IGZO) thin film transistor switch of the suitable type such as thin film transistor switch, amorphous silicon film transistor switch.It is preferred that institute State thin film transistor switch to switch for low-temperature polysilicon film transistor.

Described insulated substrate 2a includes the first surface A1 and second surface A2 being oppositely arranged with first surface A1, and described One surface A 1 is used for receiving the touch of target object or close to input, the plurality of sensing unit 11, the plurality of scanning line-group Group B, the plurality of data wire group D and described first reference signal line R1 are arranged on described second surface A2.

The sensing electrode 111 of the plurality of sensing unit 11 is compared to described first controlling switch 113, described second control Switch 113, the plurality of scan line group B and the plurality of data line-group D group are closer to described second surface A2.

Described first controlling switch 113, described second controlling switch 115, the plurality of scan line group B and described many Individual data line-group group D is located at the side of the sensing electrode 111 of the plurality of sensing unit 11 back to described insulated substrate 2a.

It is preferred that the sensing electrode 111 of the plurality of sensing unit 11 cover described first controlling switch 113, described Two controlling switches 115, the plurality of scan line group B and the plurality of data wire group D.

Described biometric information sensor 1 further includes passivation layer 16, and described passivation layer 16 is arranged on the plurality of sensing On unit 11, the plurality of scan line group B, the plurality of data wire group D and described first reference signal line R1.

Described passivation layer 16 is used for planarizing the surface of described biometric information sensor 2, and single to the plurality of sensing First 11 grade elements are protected.

See also Fig. 5 and Fig. 7, Fig. 7 is the preparation method flow chart of an embodiment of biometric information sensor 2. The preparation method of described biometric information sensor 2 is as follows.

F1：One insulated substrate 2a is provided；

Described insulated substrate 2a is, for example, glass substrate.

F2：The plurality of sensing electrode 111 is formed on described insulated substrate 2a；

Described sensing electrode 111 is for example made up of metal material.So, change ground, described sensing electrode 111 alternatively has Other suitable conductive materials are made, and for example, described sensing electrode 111 also can be made up of transparent conductive material, described transparent Conductive material is, for example, tin indium oxide, indium zinc oxide etc..In addition, described sensing electrode also can be by alloy material systems such as molybdenum lithium molybdenums Become.

F3：First insulating barrier 12 is formed on the plurality of sensing electrode 111；

The described first insulating barrier 12 for example, material such as silica, silicon nitride is made.

F4：First controlling switch 113 and the second controlling switch 115 are formed on described first insulating barrier 12, and in described Formed on first insulating barrier 12 and be through to the through hole H of sensing electrode 111, by described through hole H, the first controlling switch 113 and the Two controlling switches 115 are connected with sensing electrode 111；

First controlling switch 113 of each sensing unit 11 and the second controlling switch 115 are formed in sensing electrode 111 Side, and be connected with sensing electrode 111 by through hole H respectively.

F5：Passivation layer 16 is formed on described first controlling switch 113 and described second controlling switch 115.

Described biometric information sensor 2 makes and finishes.It should be noted that in above-mentioned preparation method, omitting and formed The step of the plurality of scan line group B, multiple data wire group D and the first reference signal line R1.

The manufacture craft of the biometric information sensor 2 due to being formed according to above-mentioned preparation method is simple, need not additionally set again Put a cover sheet or form coat (Coating layer), thus manufacturing cost can be saved.

So, change ground, in other embodiments, the preparation method of described biometric information sensor 2 is alternatively：Institute State the first controlling switch 113 that each sensing unit 11 is formed on insulated substrate 2a and the second controlling switch 115, then in each sensing Form sensing electrode 111 in described first controlling switch 113 of unit 11 and described second controlling switch 115, next, in sense Survey setting cover sheet or formation coat (Coating layer) on electrode 111.So, also possible.Need explanation It is to also omit the step to the plurality of scan line group B, multiple data wire group D and the first reference signal line R1 herein Description.

Continue with refering to Fig. 5, and see also Fig. 8, Fig. 8 is to make the first controlling switch 113 to open with the second control Close 115 method flow diagram.So that the first controlling switch 113 and the second controlling switch 115 are as amorphous silicon film transistor as a example, right Form the first controlling switch 113 during making biometric information sensor 2 and the manufacture method of the second controlling switch 115 is entered Row is described as follows.

F41：Coordination electrode G1 and second controlling switch of the first controlling switch 113 are formed on described first insulating barrier 12 115 coordination electrode G2；

F42：Form the second insulating barrier 13 in described first insulating barrier 12, described coordination electrode G1, G2；

The described second insulating barrier 13 for example, material such as silica, silicon nitride is made.

F43：Active layer 14,15 is formed on described second insulating barrier 13；

Described active layer 14,15 is amorphous silicon layer.

F44：Formed on described second insulating barrier 13 and described first insulating barrier 12 and be through to described sensing electrode 111 Through hole H；

It should be noted that step F4 and step F5 can be incorporated in same step realizing, so, alternatively different at two Formed in step.

F45：First transmission electrode S11 and second biography of the first controlling switch 113 is formed on described second insulating barrier 13 Transmission pole S12, the first transmission electrode S21 and the second transmission electrode S22 of formation the second controlling switch 115, and described second biography Transmission pole S12 and the second transmission electrode S22 are full of described through hole H, are connected with connecting described sensing electrode 111 respectively.

Described first transmission electrode S11 and the second transmission electrode S12 is located at the both sides of described active layer 14, described first biography Transmission pole S21 and the second transmission electrode S22 are located at the both sides of described active layer 15, thus forming described first controlling switch 113 With described second controlling switch 115.

In the present embodiment, the second transmission electrode S12 of described first controlling switch 113 and described second controlling switch 115 the second transmission electrode S22 is connected with described sensing electrode 111 by a through hole H respectively.So, in other embodiments, The second transmission electrode S12 of described first controlling switch 113 in same sensing unit 11 and described second controlling switch 115 Second transmission electrode S22 can be connected with described sensing electrode 111 by same through hole H.

In step F5：In described second insulating barrier 13, the first transmission electrode S11, active layer 14, the second transmission electrode S12, Form described passivation layer 16 on first transmission electrode S21, active layer 15, the second transmission electrode S22.

The first controlling switch 113 being formed in above-mentioned preparation method and the second controlling switch 115 mainly bottom gate type (Bottom-Gate) thin film transistor (TFT), so, described first controlling switch 113 and the second controlling switch 115 are alternatively top gate type (Top-Gate) thin film transistor (TFT), such as low-temperature polysilicon film transistor.

Need it is further noted that the plurality of scan line group B, multiple data wire group D, the first reference signal line R1, described first controlling switch 113, described second controlling switch 115 connection cabling last for example by the modes such as via with On the second surface A2 of described insulated substrate 2a formed surrounding's wiring (sign) be connected, with aforesaid drive circuit 20 Or corresponding circuit carries out signal transmission in control chip 3 described later.

Alternatively, described biometric information sensor 2 further includes described scan drive circuit 21, the choosing of the plurality of data Select device 241, described second reference signal line R2 and described sensing signal line L.Described scan drive circuit 21, the plurality of number Become the second of described insulated substrate 2a with described sensing signal line L-shaped according to selector 241, described second reference signal line R2 In surface A 2.

Described scan drive circuit 21, the plurality of data selector 241, described second reference signal line R2 and described Sensing signal line L is arranged on the plurality of sensing unit 11 around.

The first choice switch S1 of described data selector 241 and the second selecting switch S2 are for example also thin film transistor (TFT) Switch.Described scan drive circuit 21 generally comprises multiple controlling switch (not shown), and the plurality of controlling switch is, for example, Thin film transistor switch.Correspondingly, the plurality of data selector 241 and described scan drive circuit 21 are in the described first control When switch 113 and described second controlling switch 115 are formed, formed in the lump by same or analogous manufacture craft, thus improving The integrated level of biometric information sensor 2, and reduce cost of manufacture.

In some embodiments, described biological information sensing device 1 includes control chip 3, and described control chip 3 includes Described control unit 30, described reference signal generation circuit 23 and described sensing drive circuit 22.That is, aforesaid drive circuit A part of circuit in 20 is formed in control chip 3, and a part is formed on biometric information sensor 2, is arranged such, a side The integrated level of biological information sensing device 1 is improved in face, reduces the volume of described biological information sensing device 1, in addition, also can reduce The manufacturing cost of biological information sensing device 1.

Alternatively, described biometric information sensor 2 and described control chip 3 are for example respectively nude film (Die), described control Chip 3 is for example arranged on described insulated substrate 2a by flip technique (Flip-Chip).When described insulated substrate 2a is, for example, During glass substrate, described control chip 3 is for example bound by the mode of glass top chip (Chip On Glass, COG) (Bonding) on described glass substrate.When described insulated substrate 2a is, for example, film substrate, described control chip 3 is for example It is bundled on described film substrate by the mode of chip-on-film (Chip On Film, COF).So, described control chip 3 Can be formed on described insulated substrate 2a using other suitable techniques, be not limited to flip technique described herein.

After described control chip 3 is arranged on the insulated substrate 2a of described biometric information sensor, then by described control Coremaking piece 3 and described biometric information sensor 1 are placed in a mold, for example, pass through to be molded (Molding) technique formation packaging body (not shown) is on described biometric information sensor 2 and described control chip 3, thus being formed as a chip (Chip).Described envelope Dress body is, for example, that epoxide resin material is made, but is not limited to described epoxide resin material, alternatively other suitable materials. So, change ground, after described control chip 3 is arranged on the insulated substrate 2a of described biometric information sensor, also may not be used It is packaged technique.

After described biological information sensing device 1 is formed, the first surface A1 of described insulated substrate 2a is used for receiving target Object approach or touch input, in other words, when user uses described biological information sensing device 1 sensing biological information, institute State first surface A1 compared to described second surface A2 more adjacent objects object.

In other embodiments, described scan drive circuit 21, described data selection circuit 24, described second reference letter Number line R2 and described sensing signal line L also can non-be arranged on described insulated substrate 2a.For example described scan drive circuit 21 He Described data selection circuit 24 may also be arranged in described control chip 3, or, it is arranged in other chip, or, with Circuit mode outside chip exists also possible.

Refer to Fig. 9, Fig. 9 is the structural representation of the another embodiment of biological information sensing device of the present invention.Described life Thing information sensor 1 further includes connector 4, and described connector 4 is used for connecting described control chip 3 and described biological letter Breath sensor 2.Described connector 4 is, for example, flexible circuit board (Flexible Printed Circuit Board, FPCB).Institute State control chip 3 to be for example arranged on described flexible circuit board 4, and passed by described flexible circuit board 4 and described biological information Sensor 2 connects.By described flexible circuit board 4, between described biometric information sensor 2 and described control chip 3, carry out letter Number transmission.

In this embodiment, described biometric information sensor 2 and described control chip 3 also can be a chip (Chip), or, described biometric information sensor 2 is nude film, and described control chip 3 is chip, or, described biological information passes Sensor 2 and described control chip 3 are nude film.

In the respective embodiments described above, when described biometric information sensor 2 is nude film or chip, by arranging described data Selection circuit 24 controls timesharing output drive signal to the sensing electrode 111 with a line to correspond to.Because described data selects electricity Each data selector 241 on road 24 is respectively provided with the Single port (not shown) being connected with described sensing drive circuit 22, institute State port to be used for transmitting pumping signal or sensing signal, correspondingly, each port corresponding setting on described biometric information sensor 2 One connection pin (not shown), in order to connect described port and described sensing drive circuit 22.So, it is possible to reduce biological information The quantity of the connection pin between sensor 2 and control chip 3.

Change ground, in other embodiments, for example, described biometric information sensor 2 is alternatively formed at display screen In or display screen on, and be not integrated into a nude film or a chip.Be formed in display screen when described biometric information sensor 2 or When on display screen, described control chip 3 can simultaneously drive a line sensing electrode 111 execution biological information sensing.

Refer to Figure 10, Figure 10 is the structural representation of another embodiment of sensing unit of the present invention.Described sensing unit 11 include 2 first controlling switches 113 being connected in parallel and 2 second controlling switches 115 being connected in parallel.

Refer to Figure 11, Figure 11 is the structural representation of the another embodiment of biological information sensing device of the present invention.Institute State and be connected by a single data wire L1 respectively between drive circuit 20 and each sensing electrode 111, omit the first controlling switch 113 and second controlling switch 115.Correspondingly, described drive circuit 20 passes through to export corresponding signal respectively to each sensing electrode 111 is also feasible.

Refer to Figure 12, Figure 12 is the structural representation of an embodiment of electronic equipment of the present invention.Described electronic equipment 9 Including the biological information sensing device 1 described in any of the above-described embodiment.Described electronic equipment 9 is, for example, that portable electronic produces Product, household formula electronic product or vehicle electronics product.However, described electronic equipment does not limit to electronic product listed herein, also It can be the electronic product of other suitable type.Described portable electronic product is, for example, mobile terminal, described mobile terminal example As for the suitable mobile terminal such as mobile phone, panel computer, notebook computer, Wearable product.Described household formula electronic product example As for the suitable household formula electronic product such as intelligent door lock, TV, refrigerator, desktop computer.Described vehicle electronics product is, for example, The suitable vehicle electronics product such as Vehicular display device, drive recorder, navigator, car refrigerator.

So that described electronic equipment 9 is as mobile phone as a example, described biological information sensing device 1 is just for example being arranged on described mobile phone Any appropriate position such as face, side, back side, in addition, described biological information sensing device 1 may be configured as exposing the outer of mobile phone Shell, may also be arranged on the inside of mobile phone.In this embodiment, described biological information sensing device 1 is arranged on the front of mobile phone.

The biological information being sensed according to described biological information sensing device 1, described electronic equipment 9 for example carries out user Identification authentication, on-line payment, quickly startup application program (APP) etc..

Because described electronic equipment 9 includes described biological information sensing device 1, the sense of described biological information sensing device 1 Survey precision higher, therefore, the better user experience of described electronic equipment 9.

Refer to Figure 13, Figure 13 is the circuit block diagram of electronic equipment one embodiment shown in Figure 12.Described electronic equipment 9 Further include main control chip 5.Described main control chip 5 is connected with described biological information sensing device 1, for passing with biological information Induction device 1 enters row data communication.Described main control chip 5 is, for example, one chip or chipset.When main control chip 5 is chipset When, described chipset includes application processor (Application Processor, AP) and power supply chip.In addition, described chip Group can further include storage chip.When main control chip 5 is one chip, described main control chip 5 is, for example, application processor. Further, described application processor also can be replaced central processing unit (Central Processing Unit, CPU).

Described main control chip 5 includes earth terminal 50, and described earth terminal 50 connects equipment ground, the ground connection letter on receiving device ground Number, ground signalling is represented with GND in Fig. 9.Also known as systematically, for example, the power supply of electronic equipment 9 is negative on described equipment ground Pole, power supply is such as battery.Described ground signalling GND also known as system ground voltage, system earth signal, equipment ground voltage or sets Standby earth signal etc..Described ground signalling GND is constant voltage, as the voltage reference of each circuit in electronic equipment 9, described Ground signalling GND is, for example, the voltage signal such as 0V (volt), 2V, (- 1) V.Generally, described equipment ground not earth ground or absolute Greatly.So, when electronic equipment 9 is connected with earth ground by conductor, it is likely to as earth ground described equipment.

In aforesaid each embodiment, described biological information sensing device 1 can be with a domain as voltage reference. Described domain is the domain on the basis of ground signalling GND.Described ground signalling GND is as each circuit in biological information sensing device 1 Voltage reference.

For improving the signal to noise ratio of the sensing signal of biological information sensing device 1, present invention further propose that using modulation skill Art scheme improves the technical purpose of signal to noise ratio to reach, and described modulation technique scheme is applied to the life described in the respective embodiments described above Thing information sensor 1.

For example, reach uniform modulation by the technical scheme on modulation ground to export to the signal of sensing unit 11.

Specifically, described drive circuit 20 for example further includes the first earth terminal 31, the second earth terminal 32, modulation circuit 33 and voltage generation circuit 34.Described modulation circuit 33 be connected to described first earth terminal 31 and described second earth terminal 32 it Between.Described modulation circuit 33 is connected with described voltage generation circuit 34 further.Described first earth terminal 31 connects to equipment Ground.Described voltage generation circuit 34 is used for providing voltage drive signals to described modulation circuit 33.Described modulation circuit 33 According to ground signalling GND of described voltage drive signals and described equipment ground to correspond to generation modulated signal MGND give described second Earth terminal 32.Described modulated signal MGND exports to the letter on described sensing unit 11 for drive circuit 20 described in uniform modulation Number, for example, described first reference signal, described second reference signal, described pumping signal, described scanning open signal and institute State scanning pick-off signal.Wherein, the ground (for example, second earth terminal 32) loading described modulated signal MGND is modulation ground.

For example, described pumping signal includes first voltage signal and second voltage signal.Described pumping signal is the first electricity Pressure signal and second voltage signal replace the square-wave pulse signal changing.Wherein, described first voltage signal is less than described second Voltage signal, described first voltage signal is, for example, ground signalling GND.Described modulated signal MGND is used for raising described second electricity Pressure signal, to improve the signal to noise ratio of sensing signal.

When described drive circuit 20 receives from the sensing signal of sensing electrode 111 output, need to sensing signal Carry out back-modulation, to obtain corresponding biological information.

In this embodiment, described biological information sensing device 1 is with two domains as voltage reference.Two domains are divided It is not shown as the domain 60 on the basis of ground signalling GND and the domain on the basis of modulated signal MGND 70.Wherein, to be grounded letter The earth terminal of the circuit in domain 60 on the basis of number GND is all directly connected to equipment ground, in the domain on the basis of modulated signal MGND The earth terminal of the circuit in 70 is all directly connected to modulation ground.Further, for modulate for the circuit on ground, its reference ground electricity Modulated signal MGND that position is loaded by modulation ground；For with equipment for ground circuit, its ground reference is equipment ground institute Ground signalling GND loading.

In the present embodiment, described control unit 30, described scan drive circuit 21, described data selection circuit 24, Described reference signal generation circuit 23 and sensing unit 11 are for example arranged in domain 70.Described sensing drive circuit 22 is for example A part is located in domain 60, and a part is located in domain 70.Described main control chip 5, described modulation circuit 33, described voltage produce electricity Road 34 is located in domain 60.

So, change ground, the present invention does not limit to division in domain 60,70 for the foregoing circuit, and manufacturer can be according to actual need Will, for example circuit conditions are different, and correspondence does different adjustment etc..

Described biological information sensing device 1 can further include ground wire G, and described ground wire G is around the plurality of sensing Unit 11 is arranged, and in some embodiments, described ground wire G is latticed, is located at same layer with described sensing electrode 111, Arrange around described sensing electrode 111 respectively.Change ground, described ground wire G is alternatively in the plurality of sensing unit 11 Periphery setting one circle etc. is also possible.

In addition, when described biological information sensing device 1 be with domain as voltage reference, described domain be to be grounded letter During domain on the basis of number GND, described first reference signal and/or for example, relatively described ground signalling of described second reference signal GND is constant voltage signal.So, when described biological information sensing device 1 is with two domains 60 and 70 as voltage reference When, described first reference signal and/or for example, relatively described ground signalling GND of described second reference signal are the voltage of change Signal, relatively described modulated signal MGND is constant voltage signal.

Further, except above by the technical scheme using modulation ground, modulation power source end or reference may also be employed The power supply voltage signal of power supply, carrys out drive circuit 20 described in uniform modulation and exports to the signal of the plurality of sensing unit 11.

Although embodiment be described already in connection with specific configuration and the sequence of operation here it should be appreciated that, replace The embodiment in generation can increase, omit or change element, operation etc..Therefore, embodiment disclosed herein is meant to be real Apply example rather than restriction.

Claims

1. a kind of biological information sensing device, including：

Multiple sensing electrodes, arrange in multiple lines and multiple rows；

Sensing electrode for same row：When described drive circuit provides pumping signal to execute biological information sense to a sensing electrode During survey, provide one first reference signal to the part or all of sensing electrode in remaining sensing electrode.

2. biological information sensing device according to claim 1 it is characterised in that：Described first reference signal is swashed with described Encourage signal identical.

3. biological information sensing device according to claim 1 it is characterised in that：Sensing electrode for same a line：When When described drive circuit provides pumping signal to execute biological information sensing to a sensing electrode, provide one second reference signal to another One sensing electrode.

4. biological information sensing device according to claim 3 it is characterised in that：Described second reference signal and described the One reference signal is identical.

5. biological information sensing device according to claim 3 it is characterised in that：Sensing electrode for same a line：Institute State drive circuit provides pumping signal to section senses electrode execution biological information sensing simultaneously, and provides described second with reference to letter Number to the part or all of sensing electrode in remaining sensing electrode.

6. biological information sensing device according to claim 5 it is characterised in that：Sensing electrode for same a line：Institute State drive circuit and simultaneously drive section senses electrode execution biological information sensing every time, driven by multiple, until having driven one Row sensing electrode execution biological information sensing.

7. the biological information sensing device according to any one in claim 1-6 it is characterised in that：Drive electricity when described Road, when providing described pumping signal to sensing electrode, receives the sensing signal from sensing electrode output, further to execute The biological information sensing of self-capacitance.

8. the biological information sensing device according to any one in claim 1-6 it is characterised in that：Described biological information Sensing device includes multiple sensing units, and described sensing unit includes：

Described sensing electrode；

First controlling switch, is connected with described sensing electrode；With

Second controlling switch, is connected with described sensing electrode；

Described drive circuit includes：

Scan drive circuit, is connected respectively with the first controlling switch in the plurality of sensing unit and the second controlling switch, uses In the first controlling switch driving in same sensing unit and the second controlling switch timesharing conducting；

Sensing drive circuit, is connected with described sensing electrode by described first controlling switch, for by the first control of conducting System switch provides described pumping signal to sensing electrode execution biological information sensing；With

Reference signal generation circuit, is connected with described sensing electrode by described second controlling switch, for by the of conducting Two controlling switches provide described first reference signal to sensing electrode.

9. biological information sensing device according to claim 8 it is characterised in that：For same row sensing electrode：

Drive the first controlling switch conducting in wherein one sensing unit, the second controlling switch to end when described scan drive circuit When, drive the first controlling switch cut-off of the part or all of sensing unit in remaining sensing unit, the second controlling switch to turn on, The second controlling switch that described reference signal generation circuit passes through conducting provides described first reference signal to sensing electrode.

10. biological information sensing device according to claim 9 it is characterised in that：Described sensing drive circuit passes through to lead The first logical controlling switch provides described pumping signal to sensing electrode execution biological information sensing, and receives from sensing electrode The sensing signal of output, to obtain biological information.

11. biological information sensing devices according to claim 9 it is characterised in that：When described scan drive circuit drives When the first controlling switch conducting of a line sensing unit, the second controlling switch cut-off, described sensing drive circuit passes through conducting First controlling switch provides described pumping signal to section senses electrode execution biological information sensing simultaneously, and described reference signal is produced The first controlling switch that raw circuit passes through conducting provides same second reference signal to part or all of in remaining sensing unit The sensing electrode of sensing unit.

12. biological information sensing devices according to claim 11 it is characterised in that：Described drive circuit further includes Multiple data selectors, the plurality of data selector connects described reference signal generation circuit and described sensing drive circuit, Each data selector passes through the sensing electrode of the first controlling switch coupling part sensing unit, described data selector further For selecting to export described pumping signal or described second reference signal to sensing electrode.

13. biological information sensing devices according to claim 12 it is characterised in that：Described drive circuit once leads to simultaneously Cross each data selector and export described pumping signal respectively to a sensing electrode execution biological information sensing, and selected by each data Select device and export described second reference signal respectively to the part or all of sensing electrode in remaining sensing electrode of a line.

14. biological information sensing devices according to claim 13 it is characterised in that：Described biological information sensing device enters One step includes control unit, and described control unit is connected respectively with described scan drive circuit and the plurality of data selector, For controlling described scan drive circuit to drive the conducting of the first controlling switch in each row sensing unit and the second controlling switch Sequential, and by control the plurality of data selector to control to export described pumping signal and described second reference signal to The sequential of sensing electrode.

15. biological information sensing devices according to claim 14 it is characterised in that：Described biological information sensing device enters One step includes：

Described first controlling switch includes coordination electrode, the first transmission electrode and the second transmission electrode；Described second controlling switch Including coordination electrode, the first transmission electrode and the second transmission electrode；Described first scan line connect described scan drive circuit and The coordination electrode of described first controlling switch；Described second scan line connects described scan drive circuit and described second control is opened The coordination electrode closed；Described first data wire connects the first transmission electrode of described data selector and the first controlling switch；Institute State the first transmission electrode that the second data wire connects described reference signal generation circuit and the second controlling switch；Described first control Second transmission electrode of switch connects described sensing electrode；Second transmission electrode of described second controlling switch connects described sensing Electrode.

16. biological information sensing devices according to claim 15 it is characterised in that：Described first data wire is used for transmitting Described pumping signal and described second reference signal, described second data wire is used for transmitting described first reference signal, described sweeps Retouching drive circuit provides scanning open signal to the first controlling switch and the second control by described first scan line, the second scan line System switch, to be controlled the first controlling switch and the conducting of the second controlling switch, to be provided by described first scan line, the second scan line Scanning pick-off signal gives the first controlling switch and the second controlling switch, to control the first controlling switch and the second controlling switch to cut Only.

17. biological information sensing devices according to claim 15 it is characterised in that：Described biological information sensing device enters One step includes：

First reference signal line, connects described reference signal generation circuit and the second data wire, for transmitting described first reference Signal；Second reference signal line, connects described reference signal generation circuit and the plurality of data selector, described for transmitting Second reference signal；With

Sensing signal line, connects described sensing drive circuit and the plurality of data selector, for transmitting described pumping signal Give sensing drive circuit to sensing electrode and transmission from the sensing signal of sensing electrode.

18. biological information sensing devices according to claim 17 it is characterised in that：Described biological information sensing device bag Include biometric information sensor, described biometric information sensor includes insulated substrate, the plurality of sensing unit, the plurality of scanning Line-group group, the plurality of data wire group and described first reference signal line, the plurality of sensing unit, the plurality of scanning Line-group group, the plurality of data wire group and described first reference signal line are formed on described insulated substrate.

19. biological information sensing devices according to claim 18 it is characterised in that：In described each sensing unit first Controlling switch and the second controlling switch are thin film transistor switch, and described insulated substrate is glass substrate.

20. biological information sensing devices according to claim 8 it is characterised in that：Described sensing unit includes one first Controlling switch and one second controlling switch, or, described sensing unit includes 2 first controlling switches being connected in parallel and parallel connection connects 2 second controlling switches connecing.

21. biological information sensing devices according to claim 18 it is characterised in that：Described insulated substrate includes the first table Face and the second surface being oppositely arranged with first surface, described first surface is used for receiving the touch of target object or close to defeated Enter, the plurality of sensing unit, the plurality of scan line group, the plurality of data wire group and described first reference signal Line is arranged on described second surface.

22. biological information sensing devices according to claim 21 it is characterised in that：The sensing of the plurality of sensing unit Electrode is compared to described first controlling switch, described second controlling switch, the plurality of scan line group and the plurality of data Line-group group is closer to described second surface.

23. biological information sensing devices according to claim 21 it is characterised in that：Described first controlling switch, described Second controlling switch, the plurality of scan line group and the plurality of data wire group are located at the sense of the plurality of sensing unit Survey electrode back to the side of described insulated substrate.

24. biological information sensing devices according to claim 21 it is characterised in that：The sensing of the plurality of sensing unit Electrode covers described first controlling switch, described second controlling switch, the plurality of scan line group and the plurality of data wire Group.

25. biological information sensing devices according to claim 18 it is characterised in that：Described biometric information sensor enters one Step includes described scan drive circuit, the plurality of data selector, described second reference signal line and described sensing signal Line, described scan drive circuit, the plurality of data selector, described second reference signal line and described sensing signal are linear Become on the second surface of described insulated substrate.

26. biological information sensing devices according to claim 25 it is characterised in that：Described scan drive circuit, described Multiple data selectors, described second reference signal line and described sensing signal line are arranged on the week of the plurality of sensing unit Enclose.

27. biological information sensing devices according to claim 25 it is characterised in that：Described scan drive circuit and described Multiple data selectors all include controlling switch, and described controlling switch is thin film transistor switch.

28. biological information sensing devices according to claim 14 it is characterised in that：Each data selector includes multiple Switch element, each switch element includes first choice switch and the second selecting switch, and described first choice switch includes controlling Electrode, the first transmission electrode and the second transmission electrode, described second selecting switch include coordination electrode, the first transmission electrode and Second transmission electrode, wherein, coordination electrode and the coordination electrode of the second selecting switch and described control that described first choice switchs Unit processed connects respectively, and the first transmission electrode of described first choice switch is connected with described sensing drive circuit, and described second First transmission electrode of selecting switch is connected with described reference signal generation circuit, the second transmission electricity of described first choice switch Pole is connected with the second transmission electrode of described second selecting switch and connects to the first data wire.

29. biological information sensing devices according to claim 28 it is characterised in that：Described control unit controls same opening Close the first choice switch in unit and the second selecting switch timesharing conducting.

30. biological information sensing devices according to claim 18 it is characterised in that：Described biometric information sensor enters one Step include passivation layer, be formed at the plurality of sensing unit, the plurality of scan line group, the plurality of data wire group and On described first reference signal line.

31. biological information sensing devices according to claim 30 it is characterised in that：Described biological information sensing device enters One step includes control chip, and described control chip includes described control unit, described reference signal generation circuit and described sensing Drive circuit.

32. biological information sensing devices according to claim 31 it is characterised in that：Described biometric information sensor and institute State control chip and be respectively nude film, described control chip is bundled on described insulated substrate；Or, described control chip is arranged on On one flexible circuit board, electrically connected with described biometric information sensor by described flexible circuit board.

33. biological information sensing devices according to claim 8 it is characterised in that：Described drive circuit further includes Modulation circuit, described modulation circuit exports to the signal of the plurality of sensing unit for drive circuit described in uniform modulation, with Improve the signal to noise ratio of sensing signal.

34. biological information sensing devices according to claim 1 it is characterised in that：Described biological information sensing device is The sensing device of self-capacitance.

35. biological information sensing devices according to claim 1 it is characterised in that：Described biological information sensing device is Fingerprint sensing device.

36. biological information sensing devices according to claim 1 it is characterised in that：Described biological information sensing device enters One step includes insulated substrate, multiple sensing unit, cover sheet, and the plurality of sensing unit is arranged on described insulated substrate and institute State between cover sheet, described cover sheet back to the plurality of sensing unit side be used for receive target object touch or Close to input, wherein, each sensing unit includes sensing electrode described in one and the sensing circuit being connected with sensing electrode.

37. biological information sensing devices according to claim 1 it is characterised in that：Described biological information sensing device enters One step includes insulated substrate, multiple sensing unit, coat, the plurality of sensing unit be arranged on described insulated substrate with described Between coat, described coat is used for receiving the touch of target object or close to defeated back to the side of the plurality of sensing unit Enter, wherein, each sensing unit includes sensing electrode described in one and the sensing circuit being connected with sensing electrode.

38. biological information sensing devices according to claim 36 or 37 it is characterised in that：Described sensing circuit includes One controlling switch and the second controlling switch, are all connected with described sensing electrode, and wherein, described first controlling switch for control is To sensing electrode, described second controlling switch is used for controlling whether to transmit the first reference signal to sensing electricity no transmission pumping signal Pole, described first controlling switch and described second controlling switch timesharing conducting.

39. a kind of electronic equipments, including the biological information sensing device described in any one in claim 1-38.