CN1700239A - Fingerprint transducer sensitivity automatic regulating method - Google Patents
Fingerprint transducer sensitivity automatic regulating method Download PDFInfo
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- CN1700239A CN1700239A CN 200510050186 CN200510050186A CN1700239A CN 1700239 A CN1700239 A CN 1700239A CN 200510050186 CN200510050186 CN 200510050186 CN 200510050186 A CN200510050186 A CN 200510050186A CN 1700239 A CN1700239 A CN 1700239A
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Abstract
The invention relates to a auto adjusting method of finger mark transducer sensitivity which comprises the following steps: 1) the transducer sensitivity of finger mark detector is S=S0 after initialing; 2) finger mark detector detects weather there is a finger covering; 3) sensitivity adjusting device can do selected finger mark transducer sensitivity adjustment by detesting results. It increases finger mark detector sensitivity when it can't detect finger, while it decreases the sensitivity when it detects the finger.
Description
Technical field:
The present invention relates to the fingerprint sensor field, relate in particular to a kind of fingerprint transducer sensitivity automatic regulating method.
Background technology:
The inductance type fingerprint sensor is a kind of fingerprint sensor commonly used at present.Its principle be when sensor sensing when having finger to cover, can be to finger emission electric signal, and measure the power of each local electric signal of finger; Strong and weak different according to finger ridge and paddy electric signal just can form fingerprint image.
Sensitivity is meant the sensitivity level whether sensor is surveyed has fingerprint to cover.As shown in Figure 1, any a fingerprint sensor all can have a desirable range of sensitivity, can work normally at this scope inner sensor.Sensitivity is provided with too high, can cause sensor too responsive, also can be as finger is arranged when not pointing; Sensitivity was provided with low, can cause sensor too blunt, have finger to cover but to detect less than.Simultaneously, the sensitivity individual difference of sensor is very big, promptly has tangible inconsistency; And with a sensor in use, its ideal sensitivity also can change, and promptly has instability.
In the prior art, fixing Sensitirity va1ue is set rule of thumb usually.Because transducer sensitivity has above-described inconsistency and instability, the fixedly sensitivity that utilization the method is set often can not adapt to actual application, and it is sensitive or blunt to cause sensor to cross easily.
Summary of the invention:
Big in order to overcome the transducer sensitivity individual difference, and the problem that can change, the invention provides a kind of fingerprint transducer sensitivity automatic regulating method, pass through switch-operated response control, dynamically arrange sensitivity, guarantee that the sensitivity of sensor remains on ideal value constantly.
The technical solution adopted for the present invention to solve the technical problems.This fingerprint transducer sensitivity automatic regulating method mainly comprises the following step:
1), after the initialization, the transducer sensitivity S=S of fingerprint detection device
0
Whether 2), the fingerprint detection device is surveyed has finger to cover;
3), according to result of detection, switch-operated response control optionally carries out in the fingerprint detection device fingerprint transducer sensitivity to be regulated, and when the fingerprint detection device is surveyed less than finger, improves the fingerprint detection device sensitivity; When the fingerprint detection device detects finger, reduce sniffer sensitivity.
The invention has the beneficial effects as follows: utilize this kind sensitivity adjustment method and device, can effectively arrive sensitivity adjustment within the ideal sensitivity scope, avoided crossing the appearance of sensitive and blunt phenomenon, make fingerprint sensor can reach best user mode.
Description of drawings:
Fig. 1 is the sensitivity principle schematic;
Fig. 2 is a frame structure synoptic diagram of the present invention;
Fig. 3 is a schematic flow sheet of the present invention;
Embodiment:
Below in conjunction with drawings and Examples the present invention is done a step explanation.
In a preferable specific embodiment, as shown in Figure 2, a fingerprint transducer sensitivity self-checking device 1 includes sniffer 2 and switch-operated response control 3.Wherein, sniffer 2 can be inductance type finger sniffer, and switch-operated response control 3 can be sense resistance and electric capacity.Whether sniffer 2 is surveyed has finger to cover, and object information is sent to switch-operated response control 3; According to result of detection, switch-operated response control 3 is adjusted sense resistance and electric capacity, and and then adjust the sensitivity of sniffer, make it to remain near the optimum value.Under situation not according to finger, this regulating system can be automatically with sensitivity adjustment near optimum value.
This fingerprint transducer sensitivity automatic regulating method mainly comprises the following step: (as shown in Figure 3)
1), after the initialization, the transducer sensitivity S=S of fingerprint detection device
0
Whether 2), the fingerprint detection device is surveyed has finger to cover;
3), as not having, enter step 4); If any, reduce transducer sensitivity S=S-Δ S, and restart to survey, so circulation enters step 4) until surveying less than finger is arranged; This step inner characteristic be adjust to Sensitirity va1ue unknown after the initialization blunt or normal range within.
Whether survey 4), once more has finger to cover: as do not have, improving transducer sensitivity S=S+ Δ S, and survey once more, circulation enters step 5) until having detected finger; If any, enter step 5); This step inner characteristic is that Sensitirity va1ue was adjusted to sensitive state.
5), S=S-Δ S, adjusting finishes.Because the last adjustment of step 4) is sensitivity adjustment have been arrived cross sensitive locations, it shows that the Sensitirity va1ue before adjusting has reached a more rational position.So the feature of this step is to turn back to sensitive Sensitirity va1ue before, this value is preferable Sensitirity va1ue.
Claims (3)
1, a kind of fingerprint transducer sensitivity automatic regulating method is characterized in that: mainly comprise the following step:
1), after the initialization, the transducer sensitivity S=S of fingerprint detection device
0
Whether 2), the fingerprint detection device is surveyed has finger to cover;
3), according to result of detection, switch-operated response control optionally carries out in the fingerprint detection device fingerprint transducer sensitivity to be regulated, and when the fingerprint detection device is surveyed less than finger, improves the fingerprint detection device sensitivity; When the fingerprint detection device detects finger, reduce sniffer sensitivity.
2, fingerprint transducer sensitivity automatic regulating method according to claim 1 is characterized in that:
A, in above-mentioned step 2) and 3) in detection whether have finger to cover: if any, reduce transducer sensitivity S=S-Δ S, and restart to survey, so circulation enters step B until surveying less than finger is arranged; As do not have, enter step B;
B, survey and whether to have finger to cover once more: as do not have, improving transducer sensitivity S=S+ Δ S, and survey once more, circulation enters step C until having detected finger; If any, enter step C;
C, desensitization S=S-Δ S, adjusting finishes automatically.
3, fingerprint transducer sensitivity automatic regulating method according to claim 1 is characterized in that: described fingerprint detection device can be inductance type finger sniffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100501862A CN100375106C (en) | 2005-06-20 | 2005-06-20 | Fingerprint transducer sensitivity automatic regulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100501862A CN100375106C (en) | 2005-06-20 | 2005-06-20 | Fingerprint transducer sensitivity automatic regulating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1700239A true CN1700239A (en) | 2005-11-23 |
| CN100375106C CN100375106C (en) | 2008-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100501862A Expired - Fee Related CN100375106C (en) | 2005-06-20 | 2005-06-20 | Fingerprint transducer sensitivity automatic regulating method |
Country Status (1)
| Country | Link |
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| CN (1) | CN100375106C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105468153A (en) * | 2015-11-25 | 2016-04-06 | 努比亚技术有限公司 | Mobile terminal and control realizing method thereof |
| CN106020671A (en) * | 2016-05-27 | 2016-10-12 | 努比亚技术有限公司 | Adjustment method and device for response sensitivity of fingerprint sensor |
| CN106250883A (en) * | 2016-08-26 | 2016-12-21 | 广东欧珀移动通信有限公司 | Pressure fingerprint identification method, device and terminal unit |
| CN107273173A (en) * | 2017-07-19 | 2017-10-20 | 北京小米移动软件有限公司 | Control method, device and the storage medium of fingerprint sensor |
| CN110298260A (en) * | 2019-06-06 | 2019-10-01 | 青岛海信智慧家居系统股份有限公司 | A kind of sensitivity regulation method, device, electronic equipment and storage medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963679A (en) * | 1996-01-26 | 1999-10-05 | Harris Corporation | Electric field fingerprint sensor apparatus and related methods |
| JP2001005949A (en) * | 1999-06-18 | 2001-01-12 | Mitsubishi Electric Corp | Fingerprint collating device |
| JP2003281507A (en) * | 2002-03-22 | 2003-10-03 | Mitsubishi Electric Corp | Fingerprint collating device, fingerprint collating terminal and id card |
| JP2005135114A (en) * | 2003-10-29 | 2005-05-26 | Mitsubishi Electric Corp | Fingerprint matching device |
-
2005
- 2005-06-20 CN CNB2005100501862A patent/CN100375106C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105468153A (en) * | 2015-11-25 | 2016-04-06 | 努比亚技术有限公司 | Mobile terminal and control realizing method thereof |
| CN105468153B (en) * | 2015-11-25 | 2019-03-19 | 努比亚技术有限公司 | A kind of mobile terminal and its method for realizing control |
| CN106020671A (en) * | 2016-05-27 | 2016-10-12 | 努比亚技术有限公司 | Adjustment method and device for response sensitivity of fingerprint sensor |
| CN106250883A (en) * | 2016-08-26 | 2016-12-21 | 广东欧珀移动通信有限公司 | Pressure fingerprint identification method, device and terminal unit |
| CN106250883B (en) * | 2016-08-26 | 2019-08-23 | Oppo广东移动通信有限公司 | Pressure fingerprint identification method, device and terminal device |
| CN107273173A (en) * | 2017-07-19 | 2017-10-20 | 北京小米移动软件有限公司 | Control method, device and the storage medium of fingerprint sensor |
| US10679026B2 (en) | 2017-07-19 | 2020-06-09 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and device for controlling fingerprint sensor and storage medium |
| CN107273173B (en) * | 2017-07-19 | 2020-08-11 | 北京小米移动软件有限公司 | Fingerprint sensor control method and device and storage medium |
| CN110298260A (en) * | 2019-06-06 | 2019-10-01 | 青岛海信智慧家居系统股份有限公司 | A kind of sensitivity regulation method, device, electronic equipment and storage medium |
| CN110298260B (en) * | 2019-06-06 | 2021-06-04 | 青岛海信智慧家居系统股份有限公司 | Sensitivity adjustment method and device, electronic equipment and storage medium |
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| Publication number | Publication date |
|---|---|
| CN100375106C (en) | 2008-03-12 |
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