CN203909813U - Fingerprint detection apparatus - Google Patents
Fingerprint detection apparatus Download PDFInfo
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- CN203909813U CN203909813U CN201420279913.7U CN201420279913U CN203909813U CN 203909813 U CN203909813 U CN 203909813U CN 201420279913 U CN201420279913 U CN 201420279913U CN 203909813 U CN203909813 U CN 203909813U
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- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 238000004313 potentiometry Methods 0.000 claims description 17
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000005059 dormancy Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a fingerprint detection apparatus comprising a fingerprint detector, a capacitance sensor, a potential detection circuit, and a driving signal generating circuit. The capacitance sensor is composed of a first electrode and a second electrode mutually separated and is connected with the fingerprint detector successively through the potential detection circuit and the driving signal generating circuit. The potential detection circuit is used for detecting the induced potential of the capacitance sensor and transmits the information of the induced potential to the driving signal generating circuit. The driving signal generating circuit activates the fingerprint detector to operate. The fingerprint detection apparatus is convenient to use, low in energy consumption, and long in a service life.
Description
Technical field
The utility model relates to fingerprint recognition detection technique, particularly a kind of finger print detection device.
Background technology
Fingerprint detector is that a kind of fingerprint collecting head and software kit thereof of utilizing combines, for strengthening the higher high-tech safety products of level of encryption such as PC, mobile phone.Use its supporting application software, can implement that start is maintained secrecy, screen protection is maintained secrecy and file, catalogue are maintained secrecy.In the occasion of needs deciphering, as long as user's finger is placed on fingerprint window.Fingerprint detector can be divided into two kinds of push type detecting device and slidingtype detecting devices, because it can meet the higher security of acquisition on simple and easy using method efficiently basis, and is subject to user's favor.
Existing fingerprint detector is generally powered by stabilized voltage supply, in running order all the time under power supply state.Be the waste to electric power resource so on the one hand, also can affect on the other hand the serviceable life of fingerprint detector.
Utility model content
The purpose of this utility model is to provide a kind of finger print detection device that can automatically change dormancy and duty, thereby once solves existing fingerprint detector energising in running order problem all the time.
For solving the problems of the technologies described above, the utility model provides a kind of finger print detection device, comprises fingerprint detector, capacitive transducer, potentiometry circuit and drives signal generating circuit.Capacitive transducer is comprised of the first apart electrode and the second electrode, and described capacitive transducer is connected with described fingerprint detector with driving signal generating circuit via potentiometry circuit successively.
In the utility model, fingerprint detector is not being received while driving signal the state in dormancy for a long time; When human finger touches capacitive transducer, can make to occur between the first electrode of capacitive transducer and the second electrode capacitance variations, produce induced potential; Potentiometry electric circuit inspection arrives this induced potential, and the information that produces induced potential is passed to driving signal generating circuit, drives signal generating circuit to activate fingerprint detector and carries out work.
Preferably, the first electrode and the second electrode two circular electrodes for being coaxially nested with.Although for example, during the electrode that the first electrode in the utility model is various shapes with the second electrode (two semicircular electrodes, two parallel linear electrodes), the effect that all can reach capacitance variations occurs when human finger touches, produces induced potential, but two the circular electrodes of preferred version for being coaxially nested with, so that the sensitivity of the capacitive transducer that the first electrode and the second electrode form is best.
More preferably, on the basis that is two circular ring electrodes being coaxially nested with at the first electrode and the second electrode, fingerprint detector is located at the inside of the second electrode.Fingerprint detector is arranged to the inside of circular the first electrode and the second electrode, the finger of human body is when touching fingerprint detector, must touch the capacitive transducer that is positioned at its periphery, make it that capacitance variations occur, produce induced potential, therefore thereby activation fingerprint detector, has improved the sensitivity of finger print detection device activation.
As further improvement, in the surrounding of fingerprint detector, be provided with LED surround.Fingerprint detector when not being activated in dormant state, fingerprint detection window does not have bright light or prompting, and fingerprint detection window is conventionally less, be slightly larger than human finger finger belly area, therefore as at dark place (particularly night), user probably cannot find the accurate location of fingerprint detection window, thereby has brought inconvenience to using.In the utility model, in the surrounding of fingerprint detector, be provided with LED surround, improved at dark place or used the convenience of this finger print detection device night.
As further improving, LED of the present utility model surround is also connected with driving signal generating circuit, by driving signal generating circuit to activate.When not using, LED surround is also in dormant state; When user's finger touch is to finger print detection device (not necessarily accurately at fingerprint detection window), cause capacitive transducer capacitance variations, produce induced potential; Potentiometry electric circuit inspection is after this induced potential, information is passed to driving signal generating circuit, drive signal generating circuit to activate LED surround and fingerprint detector simultaneously, LED illuminates fingerprint detector surround, user is capable of regulating finger position, accurately finds fingerprint detection window, carries out fingerprint detection.
Finger print detection device of the present utility model, on the basis of existing fingerprint detector, set up capacitive transducer, potentiometry circuit, drive signal generating circuit and LED surround, make fingerprint detector can automatically change dormancy and duty, low energy, extended serviceable life of fingerprint detector, and same rapid and convenient at dark place or while using night, is applicable to need the every field of fingerprint detection technology.
Accompanying drawing explanation
Fig. 1 is according to the structural representation of the finger print detection device of the utility model the first embodiment;
Fig. 2 is according to the structural representation of the finger print detection device of the utility model the second embodiment;
Fig. 3 is according to the structural representation of the finger print detection device of the utility model the 3rd embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, each embodiment of the present utility model is explained in detail.Yet, persons of ordinary skill in the art may appreciate that in each embodiment of the utility model, in order to make reader understand the application better, many ins and outs have been proposed.But, even without these ins and outs and the many variations based on following embodiment and modification, also can realize each claim of the application technical scheme required for protection.
The first embodiment of the present utility model relates to a kind of finger print detection device, and concrete structure as shown in Figure 1, comprises fingerprint detector 1, capacitive transducer, potentiometry circuit 2 and drives signal generating circuit 3; Capacitive transducer is comprised of the first electrode 4 and the second electrode 5 apart, semi-annular shape; Capacitive transducer is connected with fingerprint detector 1 with driving signal generating circuit 3 via potentiometry circuit 2 successively;
Potentiometry circuit 2 is for detection of the induced potential of capacitive transducer, and the information of induced potential is passed to and driven signal generating circuit 3, drives signal generating circuit 3 to activate fingerprint detectors 1 and carries out work.Specifically, fingerprint detector 1 is not being received while driving signal the state in dormancy for a long time; When human finger touches capacitive transducer, can make to occur between the first electrode 4 of capacitive transducer and the second electrode 5 capacitance variations, produce induced potential; Potentiometry circuit 2 detects this induced potential, and the information that produces induced potential is passed to and driven signal generating circuit 3, drives signal generating circuit 3 to activate fingerprint detector 1 and carries out work.
The second embodiment of the present utility model relates to a kind of finger print detection device, and its concrete structure as shown in Figure 2.The second embodiment and the first embodiment are roughly the same, and key distinction part is: in the first embodiment, capacitive transducer is comprised of the first electrode 4 and the second electrode 5 apart, semi-annular shape.And in the utility model the second embodiment, the first electrode 4 and the second electrode 5 are two electrodes circular, that be coaxially nested with, and fingerprint detector 1 is located to the inside of the second circular electrode 5, can make the finger of human body when touching fingerprint detector, be easy to touch the capacitive transducer that is positioned at its periphery, thereby improved the sensitivity of finger print detection device activation.
Specifically, the finger print detection device of present embodiment comprises fingerprint detector 1, capacitive transducer, potentiometry circuit 2 and drives signal generating circuit 3; Capacitive transducer is comprised of apart, circular the first electrode 4 that be coaxially nested with and circular the second electrode 5, and fingerprint detector 1 is located at the inside of the second electrode 5; Capacitive transducer is connected with fingerprint detector 1 with driving signal generating circuit 3 via potentiometry circuit 2 successively.
The finger print detection device of above-mentioned embodiment, its course of work is identical with the first embodiment, fingerprint detector is arranged to the first circular electrode 4 and the inside of the second electrode 5, the finger of human body is when touching fingerprint detector 1, must touch the capacitive transducer that is positioned at its periphery, make it that capacitance variations occur, produce induced potential, thereby activate fingerprint detector 1, thereby the sensitivity of this finger print detection device is higher.
The 3rd embodiment of the present utility model relates to a kind of finger print detection device, the 3rd embodiment has been done further improvement on the first embodiment basis, main improvements are: in the utility model the 3rd embodiment, surrounding at fingerprint detector is provided with LED surround, has improved at dark place or has used the convenience of this finger print detection device night.
Concrete structure as shown in Figure 3, comprises fingerprint detector 1, capacitive transducer, potentiometry circuit 2 and drives signal generating circuit 3; Capacitive transducer is comprised of apart, circular the first electrode 4 that be coaxially nested with and circular the second electrode 5, and fingerprint detector 1 is located at the inside of the second electrode 5; Capacitive transducer is connected with fingerprint detector 1 with driving signal generating circuit 3 via potentiometry circuit 2 successively; Surrounding at fingerprint detector 1 is provided with LED surround 6, and LED surround 6 is also connected with driving signal generating circuit 3.
When not using, LED surround 6 is also in dormant state; When user's finger touch is to finger print detection device (not necessarily accurately at fingerprint detection window), cause capacitive transducer capacitance variations, produce induced potential; Potentiometry circuit 2 detects after this induced potential, information is passed to and driven signal generating circuit 3, drive signal generating circuit 3 to activate LED surround 6 and fingerprint detector 1 simultaneously, fingerprint detector 1 is illuminated in LED surround 6, user is capable of regulating finger position, accurately finds fingerprint detection window, carries out fingerprint detection.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above are to realize specific embodiment of the utility model, and in actual applications, can to it, do various changes in the form and details, and do not depart from spirit and scope of the present utility model.
Claims (5)
1. a finger print detection device, comprise fingerprint detector (1), it is characterized in that, also comprise capacitive transducer, potentiometry circuit (2) and drive signal generating circuit (3), described capacitive transducer is comprised of apart the first electrode (4) and the second electrode (5), and described capacitive transducer is connected with described fingerprint detector (1) with driving signal generating circuit (3) via potentiometry circuit (2) successively;
Potentiometry circuit (2) is for detection of the induced potential of capacitive transducer, and the information of described induced potential is passed to and driven signal generating circuit (3), drives signal generating circuit (3) to activate fingerprint detector (1) and carries out work.
2. finger print detection device according to claim 1, is characterized in that, described the first electrode (4) and the second electrode (5) two circular ring electrodes for being coaxially nested with.
3. finger print detection device according to claim 2, is characterized in that, described fingerprint detector (1) is located at the inside of the second electrode (5).
4. according to the finger print detection device described in claim 1-3 any one, it is characterized in that, in the surrounding of described fingerprint detector (1), be provided with LED surround (6).
5. finger print detection device according to claim 4, is characterized in that, described LED surround (6) is connected with driving signal generating circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420279913.7U CN203909813U (en) | 2014-05-28 | 2014-05-28 | Fingerprint detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420279913.7U CN203909813U (en) | 2014-05-28 | 2014-05-28 | Fingerprint detection apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN203909813U true CN203909813U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420279913.7U Expired - Lifetime CN203909813U (en) | 2014-05-28 | 2014-05-28 | Fingerprint detection apparatus |
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| Country | Link |
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| CN (1) | CN203909813U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559065A (en) * | 2015-11-13 | 2017-04-05 | 上海宏昊企业发展有限公司 | Self-capacitance mutual capacitance integral type touch key-press |
| WO2018120441A1 (en) * | 2016-12-28 | 2018-07-05 | 创智能科技股份有限公司 | Optical biometric recognition device |
| US10296771B2 (en) | 2015-03-27 | 2019-05-21 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint recognition system and method |
| CN111149103A (en) * | 2017-07-06 | 2020-05-12 | 华为技术有限公司 | Electronic device |
-
2014
- 2014-05-28 CN CN201420279913.7U patent/CN203909813U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10296771B2 (en) | 2015-03-27 | 2019-05-21 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint recognition system and method |
| CN106559065A (en) * | 2015-11-13 | 2017-04-05 | 上海宏昊企业发展有限公司 | Self-capacitance mutual capacitance integral type touch key-press |
| WO2018120441A1 (en) * | 2016-12-28 | 2018-07-05 | 创智能科技股份有限公司 | Optical biometric recognition device |
| CN111149103A (en) * | 2017-07-06 | 2020-05-12 | 华为技术有限公司 | Electronic device |
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