CN205302329U - Fingerprint detection circuit and display device - Google Patents
Fingerprint detection circuit and display device Download PDFInfo
- Publication number
- CN205302329U CN205302329U CN201620031093.9U CN201620031093U CN205302329U CN 205302329 U CN205302329 U CN 205302329U CN 201620031093 U CN201620031093 U CN 201620031093U CN 205302329 U CN205302329 U CN 205302329U
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- fingerprint detection
- detection circuit
- fingerprint
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Abstract
The utility model provides a fingerprint detection circuit, fingerprint detection circuit includes at least one fingerprint the detection unit, be provided with switch transistor and capacitive sensing in the fingerprint the detection unit, fingerprint the detection unit is still including the data input end of exporting amplifying element with be used for receiving data signal, output amplifying element the control end with capacitive sensing's second ploe links to each other, output amplifying element's output forms and does fingerprint the detection unit's output, output amplifying element the input with the data signal input links to each other, output amplifying element can be based on capacitive sensing deposit electricity storage amount's change and the control end voltage variation that produces to passing through the input of data signal input output amplifying element's electric current enlargies and output. The utility model provides a display device. Utilize fingerprint detection circuit can accurately confirm the fingerprint appearance.
Description
Technical field
The utility model relates to fingerprint detection field, particularly, relates to a kind of fingerprint detection electricityRoad and a kind of display unit that comprises this fingerprint detection circuit.
Background technology
At present, can survey and cover this with the fingerprint detection circuit that comprises inductance capacitanceFingerprint on fingerprint detection circuit.
In the time that finger does not cover on fingerprint detection circuit, as shown in Figure 1, inductance capacitance CThe first utmost point C1 and the second utmost point C2 of inductance capacitance C between form stable electric field. Work as handWhile referring to cover on fingerprint detection circuit, can change the electric weight of storing in inductance capacitance, therebyCan change the paddy of electric current fingerprint of fingerprint detection circuit output and the ridge of fingerprint to inductance capacitanceImpact is different, therefore, determines the pattern of fingerprint by the variable quantity of electric current.
But the current fingerprint detection circuit that comprises inductance capacitance and switching transistor sometimesCannot identify very accurately fingerprint pattern.
Utility model content
The purpose of this utility model is to provide a kind of fingerprint detection circuit, described fingerprint detectionCircuit can be identified fingerprint pattern exactly. The purpose of this utility model is also to provide a kind of bagDraw together the display unit of described fingerprint detection circuit.
To achieve these goals, as an aspect of the present utility model, provide one to refer toLine detection circuit, described fingerprint detection circuit comprises at least one fingerprint detection unit, described fingerIn line probe unit, be provided with switching transistor and inductance capacitance, the grid of described switching transistorBe formed as the control end of described fingerprint detection unit, first utmost point of described switching transistor is formed asThe charging end of described fingerprint detection unit, second utmost point of described switching transistor and described induced electricityThat holds is first extremely connected, and wherein, described fingerprint detection unit also comprises output amplifier element and useIn the data input pin, the control end of described output amplifier element and the described sense that receive data-signalAnswer the second extremely connected of electric capacity, the output of described output amplifier element is formed as described fingerprint and visitsThe output of measurement unit, the input of described output amplifier element and described data-signal inputBe connected, described output amplifier element can produce according to the variation of described inductance capacitance storing electricityRaw control end voltage change is amplified input described output by described data-signal inputThe electric current of element amplifies and exports.
Preferably, described output amplifier element is triode, the grid of described output amplifier elementThe utmost point is formed as the control end of described output amplifier element, the first utmost point shape of described output amplifier elementBecome the input of described output amplifier element, second utmost point of described output amplifier element is formed asThe output of described output amplifier element.
Preferably, described fingerprint detection circuit also comprises scan line and data wire, described dataThe number of line is identical with the line number of described fingerprint detection unit, with the fingerprint detection unit pair of a lineShould be in same data wire, first utmost point of described output amplifier element is electrically connected with corresponding data wireConnect, the number of described scan line is identical with the line number of described fingerprint detection unit, is positioned at same a lineFingerprint detection unit corresponding to same scan line, the grid of described switching transistor and correspondingScan line electrical connection.
Preferably, described scan line and described data wire be arranged in parallel.
Preferably, described fingerprint detection circuit also comprises charging wire, the number of described charging wireIdentical with the columns of described fingerprint detection unit, the described fingerprint detection of same row unit is corresponding to same, a charging wire, the charging end of described fingerprint detection unit is connected with corresponding charging wire.
Preferably, described fingerprint detection circuit also comprises output line, the number of described output lineIdentical with the columns of described fingerprint detection unit, same row fingerprint detection unit is corresponding to sameOutput line, the output of described fingerprint detection unit is connected with corresponding output line.
Preferably, described charging wire and described output line be arranged in parallel, described in same rowFingerprint detection unit, described charging wire and described output line lay respectively at this row fingerprint detection unitBoth sides.
Preferably, corresponding to the described fingerprint detection of same row unit, described charging wire with described inSpacing between output line is 40～60 μ m.
Preferably, in the time that described fingerprint detection circuit comprises scan line, described charging wire and instituteThe bearing of trend of stating scan line intersects.
Preferably, first utmost point of described inductance capacitance comprises towards second of described inductance capacitanceThe utmost point protrude first induction refer to, second utmost point of described inductance capacitance comprises towards described inductance capacitanceFirst the utmost point protrude second induction refer to, described first induction refer to described second induction refer to interlockArrange.
Preferably, first utmost point of described inductance capacitance and second utmost point of described inductance capacitance byTransparent electrode material is made.
As another aspect of the present utility model, provide a kind of display unit, shown dressPut and comprise fingerprint detection circuit, wherein, described fingerprint detection circuit is provided by the utility modelAbove-mentioned fingerprint detection circuit.
Operator's finger is ground connection, when operator's finger is positioned on fingerprint detection unitFang Shi, can cause the variation of the electric weight of storing described in inductance capacitance. In inductance capacitance, storeThe variation of electric weight can cause faradic generation. Because second utmost point and the output of inductance capacitance are putLarge element is connected, and therefore, can amplify the induced-current of output. Due to fingerprint detectionThe induced-current of unit output is larger, thereby can easily judge and cover fingerprint detection unitTop be the paddy of fingerprint or the ridge of fingerprint, and then can accurately determine and cover fingerprint spyFingerprint pattern on measurement unit.
Brief description of the drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms descriptionA part, be used from explanation the utility model with detailed description of the invention one below, but notForm restriction of the present utility model. In the accompanying drawings:
Fig. 1 is the schematic diagram of fingerprint detection electric capacity;
Fig. 2 is fingerprint detection unit in fingerprint detection circuit provided by the utility modelSchematic diagram;
Fig. 3 is the grid voltage of the switching transistor in the fingerprint detection unit shown in Fig. 2Change schematic diagram;
Fig. 4 is the schematic diagram of a part for fingerprint detection circuit provided by the utility model;
Fig. 5 is the structure chart of the fingerprint detection unit shown in Fig. 3;
Fig. 6 fingerprint covers the schematic diagram on described fingerprint detection circuit;
Fig. 7 is the schematic diagram that is related between the gate source voltage of amplifier element and duty.
Description of reference numerals
100: charging wire 200: output line
300: scan line 400: data wire
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated. ShouldWhen understanding, detailed description of the invention described herein is only new for this practicality of description and interpretationType, is not limited to the utility model.
Study discovery through utility model people of the present utility model, the finger providing in prior artWhy line detection circuit cannot detect fingerprint pattern is exactly because point the finger causingCurent change in line detection circuit is too small, therefore, cannot distinguish exactly fingerprint ridge andThe paddy of fingerprint.
In order to address the above problem, as an aspect of the present utility model, a kind of fingerprint is visitedSlowdown monitoring circuit, described fingerprint detection circuit comprises at least one fingerprint detection unit, as shown in Figure 2,In described fingerprint detection unit, be provided with switching transistor T1 and inductance capacitance C, switch crystalThe grid of pipe T1 is formed as the control end of described fingerprint detection unit, switching transistor T1'sFirst utmost point is formed as the charging end of described fingerprint detection unit, second utmost point of switching transistor T1Extremely be connected with first of inductance capacitance C, wherein, described fingerprint detection unit also comprises outputAmplifier element T2 and for receiving the data input pin of data-signal, output amplifier element T2Control end be extremely connected with second of inductance capacitance C, the input of output amplifier element T2 withDescribed data-signal input is connected, and the output of output amplifier element T2 is formed as described fingerThe output of line probe unit, output amplifier element T2 can store C electricity according to inductance capacitanceThe variation of amount and the control end voltage change that produces are to by described data-signal input inputThe electric current of this output amplifier element T2 amplifies and exports.
Provide effective control signal gauge tap crystal to the control end of switching transistor T1After pipe T1 conducting, the charging end of described fingerprint detection unit and first utmost point of inductance capacitance C are ledLogical, thus can charge to inductance capacitance C.
Operator's finger is ground connection, when operator's finger is positioned on fingerprint detection unitFang Shi, can cause the variation of the electric weight of storing described in inductance capacitance C. In inductance capacitance CThe variation of the electric weight of storage can cause the voltage change of second utmost point of inductance capacitance C, due to senseAnswer second utmost point of capacitor C to be connected with output amplifier element T2, output amplifier element T2 controlsTerminal voltage variation can cause exporting the curent change that amplifier element T2 exports, particularly, and canWith to the electric current of inputting described output amplifier element by described data-signal input is carried outAmplify and export, thereby obtaining larger output current. Due to the sense of fingerprint detection unit outputInduced current is larger, thereby can easily judge that what cover fingerprint detection unit top is fingerprintPaddy or the ridge of fingerprint, and then can accurately determine the finger covering on fingerprint detection unitLine pattern.
It should be explained that, " induced-current relevant to described inductance capacitance " refers to hereinDescribed faradic size is along with the number of the electric charge of storing in inductance capacitance and change.
Described fingerprint detection circuit can comprise a fingerprint detection unit, also can comprise manyIndividual fingerprint detection unit. In the time that fingerprint detection circuit comprises a fingerprint detection unit, Ke YitongCross operator's moveable finger above fingerprint detection circuit and obtain complete fingerprint pattern.
In the time that fingerprint detection circuit comprises multiple fingerprint detection unit, as shown in Figure 6, whenWhen operator's finger is positioned at the top of fingerprint detection circuit, the paddy of fingerprint and the ridge of fingerprint are respectivelyCorresponding to different inductance capacitances, operator covers finger on fingerprint detection circuit and can obtainObtain complete fingerprint pattern.
Preferably, fingerprint detection circuit can comprise the multiple fingerprints spies that are arranged as multiple lines and multiple rowsMeasurement unit.
In the utility model, it is special that the concrete structure of output amplifier element T2 is not doneLimit, preferably, output amplifier element T2 is triode, and described fingerprint detection unit also wrapsDraw together the data input pin for receiving data-signal, the grid of output amplifier element T2 is formed asThe control end of this output amplifier element T2, first utmost point of output amplifier element T2 is formed as thisThe output of output amplifier element T2, and with the data input pin phase of described fingerprint detection unitConnect, second utmost point of output amplifier element T2 is formed as the output of this output amplifier element T2.In this embodiment, switching transistor T1, output amplifier element T2 and inductance capacitance CForm one amplify grounded emitter circuit, and, inductance capacitance C be set to store make defeatedGo out the electric weight that amplifier element T2 is operated in amplification region. Output amplifier element T2 has been shown in Fig. 7A kind of embodiment, in this embodiment, when the gate source voltage of output amplifier element T2Vgs is between 0～15V time, and output amplifier element T2 is operated in amplification region.
In the time of fingerprint detection circuit working provided by the utility model, first, gauge tapTransistor T 1 conducting, thereby to inductance capacitance C charging, then closing switch transistor T 1,Electric weight on inductance capacitance C is in hold mode, and the grid potential of output amplifier element T2 is protectedHold constantly, the opening of output amplifier element T2 also keeps stable.
Before operator's finger touch fingerprint detection unit, the electric capacity of inductance capacitance C isC0, and in inductance capacitance C, stored certain electric weight Q, and therefore, output amplifier elementThe grid voltage U of T2 is Q/C0. In the time of finger touch fingerprint detection unit, inductance capacitance CElectric capacity be C0+Cf, wherein, CfThe electric capacity forming for operator's finger. Now, inductionThe electric weight of capacitor C storage is Q ', and now, the grid voltage U of output amplifier element T2 isQ’/(C0+Cf). Because a part of electric weight of storing in inductance capacitance C is pointed suction greatlyGround, therefore, in the time of finger touch fingerprint detection unit, the electric weight of inductance capacitance C storage subtractsFew (, Q ' < Q), electric capacity increases ((C0+Cf)＞C0), therefore, there is finger to touchThe grid voltage of exporting amplifier element T2 while touching is less than output while thering is no finger touch and amplifies unitThe grid voltage of part T2. In the time that the grid voltage of output amplifier element T2 has less variation,Electric current by output amplifier element T2 output will have a larger variation, thereby can holdDefinite part that covers top, fingerprint detection unit fingerprint of changing places is paddy or the fingerprint of fingerprintRidge.
Preferably, output amplifier element T2 is thin film transistor (TFT).
As a kind of preferred embodiment of the present utility model, described fingerprint detection circuit is passableComprise multiple fingerprint detection unit, for the ease of controlling, correspondingly, as shown in Figure 4, described inFingerprint detection circuit also comprises scan line 300 and data wire 400. The number of data wire 400 withThe line number of described fingerprint detection unit is identical, with the fingerprint detection unit of a line corresponding to sameData wire, first utmost point of output amplifier element T2 is electrically connected with corresponding data wire 400, sweepsThe number of retouching line 300 is identical with the line number of described fingerprint detection unit, is positioned at the fingerprint of same a lineProbe unit is corresponding to same scan line 300, and the grid of switching transistor T1 is with correspondingScan line 300 is electrically connected.
In the utility model, by scan line 300 to the switching transistor T1 in same a lineThe control signal that provides gauge tap transistor T 1 to open or close, by data wire 400 toOutput amplifier element T2 provide data-signal.
For the ease of arranging and reducing the shared area of fingerprint detection circuit, preferably, scanningLine 300 and data wire 400 be arranged in parallel.
For the ease of charging to fingerprint detection unit, preferably, described fingerprint detection circuit alsoComprise charging wire 100, the number of charging wire 100 is identical with the columns of described fingerprint detection unit,The described fingerprint detection of same row unit is corresponding to same charging wire 100, described fingerprint detection listThe charging end of unit is connected with corresponding charging wire 100.
For the ease of collecting the signal of fingerprint detection unit output, preferably, described fingerprint is visitedSlowdown monitoring circuit also comprises output line 200, the number of this output line 200 and described fingerprint detection unitColumns identical, same row fingerprint detection unit is corresponding to same output line 200, described fingerThe output of line probe unit is connected with corresponding output line 200.
In same row fingerprint detection unit, the switch crystalline substance in the fingerprint detection unit of different rowsThe opening time difference of body pipe T1, therefore, a moment, same row fingerprint detection unitIn only have a fingerprint detection unit to output line 200 output signals.
For the ease of arranging, preferably, charging wire 100 be arranged in parallel with output line 200,For the described fingerprint detection of same row unit, charging wire 100 and output line 200 lay respectively at thisThe both sides of row fingerprint detection unit.
As a kind of preferred embodiment of the present utility model, corresponding to the described fingerprint of same rowProbe unit, the spacing between charging wire 100 and output line 200 is 40～60 μ m. ThusKnown, the width of a fingerprint detection unit is 40～60 μ m. Wide by fingerprint detection unitDegree is arranged in above-mentioned scope, is conducive to fingerprint to detect, and, now fingerprint detectionThe size of each element in unit is unlikely to too small, thereby obtains described fingerprint spy owing to manufacturingMeasurement unit. For example, as a kind of preferred embodiment of the present utility model, a fingerprint detectionThe width of unit can be 50 μ m.
For the ease of arranging, preferably, when described fingerprint detection circuit comprises scan line 300Time, the bearing of trend of charging wire 100 and scan line 300 intersects. Preferably, charging wire 100Orthogonal with scan line 300.
In order to increase mutual appearance, preferably, as shown in Figure 5, first utmost point of inductance capacitance CC1 comprises that first induction of protruding towards the second utmost point C2 of this inductance capacitance C refers to, induced electricityThe second utmost point C2 that holds C comprises second sense of protruding towards the first utmost point C1 of this inductance capacitance CShould refer to, described the first induction refers to refer to be crisscross arranged with described the second induction. Can see by Fig. 5Go out, the first utmost point C1 and the second utmost point C2 of inductance capacitance C are all formed as zigzag. And,To the embodiment shown in Fig. 5, the first utmost point C1 of inductance capacitance C is by via hole and switchThe second utmost point electrical connection of transistor T 1, the second utmost point C2 of inductance capacitance C is by via hole and defeatedGo out the grid electrical connection of amplifier element T2.
When fingerprint detection circuit provided by the utility model is arranged on the viewing area of display unitWhen middle, in order not affect the normal demonstration of display unit, preferably, of inductance capacitance CThe second utmost point C2 of one utmost point C1 and inductance capacitance C makes by transparent electrode material.
The preferred enforcement side of the fingerprint detection circuit provided by the utility model shown in Fig. 4Formula, as can be seen from the figure, described fingerprint detection point comprises and is arranged as 9 fingers that three row three are listed asLine probe unit, every row fingerprint detection unit is all to having scan line 300 and data wire 400,Every row fingerprint detection unit is all to having charging wire 100 and output line 200. Data wire 400 canTo be connected with the chip that constant data signal is provided.
Charging wire 100 can be connected with dc source, and one end of output line 200 can arrangeAn output module, this output module flows to calculating for the signal that output line 200 is exportedThe analysis chip of fingerprint pattern. Described fingerprint detection circuit can also comprise shift register, shouldShift register comprises the multistage shifting deposit unit of cascade, multistage shifting deposit unit and manyScan line 300 is connected correspondingly, thereby line by line for scan line 300 provides sweep signal.
Receive open pipe transistor T 1 conducting on the scan line 300 of sweep signal, thereby beThe inductance capacitance charging of this row. After charging finishes, the switching transistor on this horizontal scanning line 300T1 cut-off. When operator's finger covers on the fingerprint detection unit that this horizontal scanning line is correspondingTime, can cause the variation of the electric weight that inductance capacitance C stores, and then cause output to amplify unitThe grid voltage of part T2 changes. Output amplifier element T2 is now operated in amplification region,Its grid voltage changes and can cause the electric current of exporting by output line 200 to produce largerChange. The variation that electric current on every the output line 200 in touch front and back is analysed in the reduction of fractions to a common denominator can judge that each refers toThe fingerprint pattern of line probe unit top.
Provide sweep signal can determine each row fingerprint detection list to each horizontal scanning line 300 successivelyThe fingerprint pattern of unit top.
As another aspect of the present utility model, provide a kind of display unit, shown dressPut and comprise fingerprint detection circuit, wherein, described fingerprint detection circuit is provided by the utility modelAbove-mentioned fingerprint detection circuit.
As noted before, owing to being provided with output amplifying unit in described fingerprint detection circuit,In the inductance capacitance that thereby finger touch can be caused, the quantity of electric charge changes the induced electricity causingBanish large, thereby can determine exactly the shape that covers the fingerprint above fingerprint detection circuitLooks.
In the utility model, not special to the particular location of fingerprint detection circuit is setRestriction. For example, fingerprint detection circuit can be arranged on to the non-display area of display unit,In this situation, the concrete structure of inductance capacitance is not limited, as long as can stored charge beCan. In order to realize the narrow frame of display unit, preferably, fingerprint detection circuit can be establishedPut in the viewing area of display unit. In this embodiment, can utilize transparency electrode materialMaterial is made described inductance capacitance.
In the utility model, described display unit is can be mobile phone, panel computer, leadThe electronic equipments such as boat instrument, notebook computer.
Be understandable that, above embodiment be only used to illustrate principle of the present utility model andThe illustrative embodiments adopting, but the utility model is not limited to this. For in this areaThose of ordinary skill, in the situation that not departing from spirit of the present utility model and essence, can doGo out various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (12)
1. a fingerprint detection circuit, described fingerprint detection circuit comprises at least one fingerprint spyMeasurement unit, described fingerprint detection is provided with switching transistor and inductance capacitance in unit, described in openClose transistorized grid and be formed as the control end of described fingerprint detection unit, described switching transistorFirst utmost point be formed as the charging end of described fingerprint detection unit, second of described switching transistorThe utmost point is extremely connected with first of described inductance capacitance, it is characterized in that, described fingerprint detection unit alsoComprise output amplifier element and for receiving the data input pin of data-signal, described output is amplifiedThe control end of element is extremely connected with second of described inductance capacitance, described output amplifier element defeatedGo out the output that end is formed as described fingerprint detection unit, the input of described output amplifier elementBe connected with described data-signal input, described output amplifier element can be according to described induced electricityThe control end voltage change of holding the variation of storing electricity and produce is to defeated by described data-signalThe electric current that enters the described output amplifier element of end input amplifies and exports.
2. fingerprint detection circuit according to claim 1, is characterized in that, described defeatedGoing out amplifier element is triode, and the grid of described output amplifier element is formed as described output and amplifiesThe control end of element, first utmost point of described output amplifier element is formed as described output amplifier elementInput, second utmost point of described output amplifier element is formed as the defeated of described output amplifier elementGo out end.
3. fingerprint detection circuit according to claim 2, is characterized in that, described fingerLine detection circuit also comprises scan line and data wire, and the number of described data wire and described fingerprint are visitedThe line number of measurement unit is identical, with the fingerprint detection unit of a line corresponding to same data wire, instituteFirst utmost point of stating output amplifier element is electrically connected with corresponding data wire, the number of described scan lineIdentical with the line number of described fingerprint detection unit, the fingerprint detection unit that is positioned at same a line corresponding toSame scan line, the grid of described switching transistor is electrically connected with corresponding scan line.
4. fingerprint detection circuit according to claim 3, is characterized in that, described in sweepRetouch line and described data wire be arranged in parallel.
5. according to the fingerprint detection circuit described in any one in claim 1 to 4, its spyLevy and be, described fingerprint detection circuit also comprises charging wire, the number of described charging wire with described inThe columns of fingerprint detection unit is identical, and the described fingerprint detection of same row unit fills corresponding to sameElectric wire, the charging end of described fingerprint detection unit is connected with corresponding charging wire.
6. fingerprint detection circuit according to claim 5, is characterized in that, described fingerLine detection circuit also comprises output line, the number of described output line and described fingerprint detection unitColumns is identical, and same row fingerprint detection unit is corresponding to same output line, described fingerprint detectionThe output of unit is connected with corresponding output line.
7. fingerprint detection circuit according to claim 6, is characterized in that, described in fillElectric wire and described output line be arranged in parallel, for the described fingerprint detection of same row unit, described in fillElectric wire and described output line lay respectively at the both sides of this row fingerprint detection unit.
8. fingerprint detection circuit according to claim 7, is characterized in that, corresponding toThe described fingerprint detection of same row unit, the spacing between described charging wire and described output line is40～60μm。
9. fingerprint detection circuit according to claim 5, is characterized in that, when describedWhen fingerprint detection circuit comprises scan line, the bearing of trend phase of described charging wire and described scan lineHand over.
10. according to the fingerprint detection circuit described in any one in claim 1 to 4, itsBe characterised in that, first utmost point of described inductance capacitance comprises second extremely protruding towards described inductance capacitanceThe first induction going out refers to, second utmost point of described inductance capacitance comprises towards the of described inductance capacitanceThe second induction that one utmost point protrudes refers to, described the first induction referring to refer to staggered establishing with described the second inductionPut.
11. fingerprint detection circuit according to claim 10, is characterized in that, described inFirst utmost point of inductance capacitance and second utmost point of described inductance capacitance are made by transparent electrode material.
12. 1 kinds of display unit, shown device comprises fingerprint detection circuit, its feature existsIn, described fingerprint detection circuit is that in claim 1 to 11, the fingerprint described in any one is visitedSlowdown monitoring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620031093.9U CN205302329U (en) | 2016-01-13 | 2016-01-13 | Fingerprint detection circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620031093.9U CN205302329U (en) | 2016-01-13 | 2016-01-13 | Fingerprint detection circuit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205302329U true CN205302329U (en) | 2016-06-08 |
Family
ID=56475942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620031093.9U Withdrawn - After Issue CN205302329U (en) | 2016-01-13 | 2016-01-13 | Fingerprint detection circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205302329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105488497A (en) * | 2016-01-13 | 2016-04-13 | 京东方科技集团股份有限公司 | Fingerprint detection circuit and display device |
| CN111275013A (en) * | 2020-02-28 | 2020-06-12 | 维沃移动通信有限公司 | Fingerprint pixel circuit and electronic equipment |
-
2016
- 2016-01-13 CN CN201620031093.9U patent/CN205302329U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105488497A (en) * | 2016-01-13 | 2016-04-13 | 京东方科技集团股份有限公司 | Fingerprint detection circuit and display device |
| CN105488497B (en) * | 2016-01-13 | 2018-12-25 | 京东方科技集团股份有限公司 | Fingerprint detection circuit and display device |
| CN111275013A (en) * | 2020-02-28 | 2020-06-12 | 维沃移动通信有限公司 | Fingerprint pixel circuit and electronic equipment |
| CN111275013B (en) * | 2020-02-28 | 2023-08-25 | 维沃移动通信有限公司 | Fingerprint pixel circuit and electronic equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160608 Effective date of abandoning: 20181225 |
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| AV01 | Patent right actively abandoned |