CN104866813A - Fingerprint identification device - Google Patents
Fingerprint identification device Download PDFInfo
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- CN104866813A CN104866813A CN201510183238.7A CN201510183238A CN104866813A CN 104866813 A CN104866813 A CN 104866813A CN 201510183238 A CN201510183238 A CN 201510183238A CN 104866813 A CN104866813 A CN 104866813A
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Abstract
The invention discloses a fingerprint identification device, which comprises a protection cover plate, a shielding layer, at least one matching layer and a fingerprint identification sensor, wherein the shielding layer is arranged at one side of the protection cover plate; the at least one matching layer is arranged between the shielding layer and the protection cover plate; the fingerprint identification sensor is attached to the side, which is away from the protection cover plate, of the shielding layer, and the fingerprint identification sensor is used for executing a fingerprint identification action; acoustic impedance of the at least one matching layer is between acoustic impedance of the protection cover plate and acoustic impedance of the shielding layer, and the at least one matching layer is used for reducing signal transmission attenuation between the shielding layer and the protection cover plate.
Description
Technical field
The present invention relates to a kind of fingerprint identification device.
Background technology
Along with portable electron device is widely used, user proposes more functional requirement to portable electron device.Fingerprint recognition sensor is arranged in portable electron device owing to having privacy protection function, experiences with adding users.Fingerprint identification device can be divided into optical profile type, condenser type, sound wave type etc.Sound wave type fingerprint recognition sensor is not subject to the impact of environment temperature, humidity because of its operation, and has that the life-span is long, resolution is high and be used widely.Fingerprint recognition sensing is integrated in usually to be had in the electronic installation of touch controllable function; cover sheet and shielding layer are set on fingerprint recognition sensor for making electronic device appearance overall consistent, so how reduce the acoustic attenuation loss problems demand caused because arranging cover sheet and shielding layer and solve.
Summary of the invention
In view of this, be necessary to provide a kind of fingerprint identification device reducing sound wave loss.
A kind of fingerprint identification device, comprising:
Cover sheet;
Shielding layer is arranged on the side of this cover sheet;
At least one matching layer is arranged between this shielding layer and this cover sheet;
Fingerprint recognition sensor is fitted in this shielding layer away from this cover sheet side, and this fingerprint recognition sensor is for performing fingerprint recognition action;
The acoustic impedance of this at least one matching layer is between this cover sheet and this shielding layer, and this at least one matching layer is decayed for the signal transmission reduced between this shielding layer and this cover sheet.
Preferably, the quantity of this at least one matching layer is one deck, and the acoustic impedance of this cover sheet is greater than the acoustic impedance of this matching layer, and the acoustic impedance of this matching layer is greater than the acoustic impedance of this shielding layer.
Preferably, this shielding layer covers this matching layer, and these shielding layer two ends have the first thickness, and this shielding layer has the second thickness on this matching layer, and this first thickness is greater than this second thickness, and the difference of this first thickness and this second thickness is the thickness of this matching layer.
Preferably, the thickness of this matching layer is 1-10 micron.
Preferably, the thickness of this matching layer is 1-5 micron.
Preferably, the size of this cover sheet, this shielding layer, this matching layer and this fingerprint recognition sensor reduces successively.
Preferably; this shielding layer, this matching layer and this projection of fingerprint recognition sensor on this cover sheet are rectangle; and the projection of this cover sheet is greater than the projection of this shielding layer; the projection of this shielding layer is greater than the projection of this matching layer, and the projection of this matching layer is greater than the projection of this fingerprint recognition sensor.
Preferably, this fingerprint identification device comprises the first matching layer and the second matching layer is cascading between this shielding layer and this cover sheet; This first matching layer fit this cover sheet arrange, this second matching layer is arranged between this first matching layer and this shielding layer.
Preferably, the acoustic impedance of this cover sheet is greater than the acoustic impedance of this first matching layer, and the acoustic impedance of this first matching layer is greater than the acoustic impedance of this second matching layer, and the acoustic impedance of this second matching layer is greater than the acoustic impedance of this shielding layer.
Preferably, the thickness sum of this first matching layer and this second matching layer is 1-10 micron.
Preferably, the thickness sum of this first matching layer and this second matching layer is 1-5 micron.
Preferably; this shielding layer, this first, second matching layer and this projection of fingerprint recognition sensor on this cover sheet are rectangle; and the projection of this cover sheet is greater than the projection of this shielding layer; the projection of this shielding layer is greater than the projection of this first matching layer; the projection of this first matching layer is greater than the projection of this second matching layer, and the projection of this second matching layer is greater than the projection of this fingerprint recognition sensor.
Compared to prior art; fingerprint identification device of the present invention arranges matching layer between cover sheet and shielding layer; and the acoustic impedance of this cover sheet, this matching layer and this shielding layer reduces successively; thus the acoustic loss that can effectively reduce when ultrasound wave transmits between this cover sheet and this shielding layer, improve the precision of fingerprint recognition.
Accompanying drawing explanation
Fig. 1 is the structural representation of fingerprint identification device one embodiment of the present invention.
Fig. 2 is the fingerprint identification device vertical view shown in Fig. 1.
Fig. 3 is the structural representation of another embodiment of fingerprint identification device of the present invention.
Fig. 4 is the fingerprint identification device vertical view shown in Fig. 3.
Main element symbol description
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, Fig. 1 is fingerprint identification device one embodiment structural representation of the present invention.Fingerprint identification device 10 comprises cover sheet 11, shielding layer 12, matching layer 13, colloid layer 14 and fingerprint recognition sensor 15.In the present embodiment, this fingerprint recognition sensor 15 is ultrasonic fingerprint identification sensor.This fingerprint recognition sensor 15 sends the first ultrasound wave 16 and receives the second ultrasound wave 17 of being fed back by finger 18 or other touch objects and complete fingerprint recognition action according to this second ultrasound wave 17.This shielding layer 12 is arranged on the side of this cover sheet 11, and this matching layer 13 is arranged between this shielding layer 12 and this cover sheet 11.This shielding layer 12 covers this matching layer 13.This matching layer 13 is for reducing the decay that between this shielding layer 12 and this cover sheet 11, ultrasound wave transmits.
Particularly; the acoustic impedance (acoustic impedance) of this matching layer 13 is between this cover sheet 11 and acoustic impedance of this shielding layer 12; and the acoustic impedance of this cover sheet 11 is greater than the acoustic impedance of this matching layer 13, the acoustic impedance of this matching layer 13 is greater than the acoustic impedance of this shielding layer 12.When the first ultrasound wave 16 that this fingerprint recognition sensor 15 sends transmits between this shielding layer 12 and this cover sheet 11; because the acoustic impedance of this matching layer 13 is between this cover sheet 11 and acoustic impedance of this shielding layer 12, reflection loss when this first ultrasound wave 16 is delivered to this cover sheet 11 by this shielding layer 12 therefore effectively can be reduced.In like manner; when being transmitted between this cover sheet 11 and this shielding layer 12 by the second ultrasound wave 17 pointed or other touch objects feed back; because the acoustic impedance of this matching layer 13 is between this cover sheet 11 and acoustic impedance of this shielding layer 12, reflection loss when this second ultrasound wave 17 is delivered to this shielding layer 12 by this cover sheet 11 therefore effectively can be reduced.
In the present embodiment, these shielding layer 12 two ends have the first thickness L1, this shielding layer 12 has the second thickness L2 on this matching layer 13, and this first thickness L1 is greater than this second thickness L2, and the difference of this first thickness L1 and this second thickness L2 is the thickness of this matching layer 13.This fingerprint recognition sensor 15 fits in this shielding layer 12 away from this cover sheet 11 side through this colloid layer 14.
The thickness of this matching layer 13 is 1-10 micron, and preferably the thickness of this matching layer 13 is 1-5 micron.
In an experiment the fingerprint identification device arranging matching layer 13 is compared with the fingerprint identification device without matching layer 13, as shown in the table.Can draw thus and effectively can improve hyperacoustic penetrance between cover sheet 11 and this shielding layer 12 when arranging matching layer 13.
In the present embodiment, this cover sheet 11 may be, but not limited to, sapphire glass cover plate, quartz glass cover plate, resin cover plate etc.This colloid layer 14 can be optic-solidified adhesive, as UV glue.Be appreciated that the material of this matching layer 13 is selected with the material of this shielding layer 12 according to this cover sheet 11, as when this cover sheet 11 is quartz glass, this matching layer 13 can be aluminium metal coating.
See also Fig. 2, Fig. 2 is the vertical view of the fingerprint identification device 10 shown in Fig. 1.The size of this cover sheet 11, this shielding layer 12, this matching layer 13 and this fingerprint recognition sensor 15 reduces successively.Particularly; this cover sheet 11, this shielding layer 12, this matching layer 13 and this fingerprint recognition sensor 15 project and are rectangle on the direction of this cover sheet 11; and the projection of this cover sheet 11 is greater than the projection of this shielding layer 12; the projection of this shielding layer 12 is greater than the projection of this matching layer 13, and the projection of this matching layer 13 is greater than the projection of this fingerprint recognition sensor 15.
Refer to Fig. 3, Fig. 3 is fingerprint identification device second embodiment structural representation of the present invention.Fingerprint identification device 20 comprises cover sheet 21, shielding layer 22, first matching layer 23, second matching layer 231, colloid layer 24 and fingerprint recognition sensor 25.In the present embodiment, this fingerprint recognition sensor 25 is ultrasonic fingerprint identification sensor.This fingerprint recognition sensor 25 sends the first ultrasound wave 26 and receives the second ultrasound wave 27 of being fed back by finger 28 or other touch objects and complete fingerprint recognition action according to this second ultrasound wave 17.This shielding layer 22 is arranged on the side of this cover sheet 21, and this first matching layer 23 this cover sheet 21 of fitting is arranged, and this second matching layer 231 is arranged between this first matching layer 23 and this shielding layer 22.This shielding layer 22 covers this first matching layer 23 and this second matching layer 231.This first matching layer 23, second matching layer 231 is for reducing the decay that between this shielding layer 22 and this cover sheet 21, ultrasound wave transmits.
Particularly; the acoustic impedance (acoustic impedance) of this first matching layer 23, second matching layer 231 is between this cover sheet 21 and acoustic impedance of this shielding layer 22; and the acoustic impedance of this cover sheet 21 is greater than the acoustic impedance of this first matching layer 23; the acoustic impedance of this first matching layer 23 is greater than the acoustic impedance of this second matching layer 231, and the acoustic impedance of this second matching layer 231 is greater than the acoustic impedance of this shielding layer 22.When the first ultrasound wave 26 that this fingerprint recognition sensor 25 sends transmits between this shielding layer 22 and this cover sheet 21; because the acoustic impedance of this first matching layer 23, second matching layer 231 is between this cover sheet 21 and acoustic impedance of this shielding layer 22, reflection loss when this first ultrasound wave 26 is delivered to this cover sheet 21 by this shielding layer 22 therefore effectively can be reduced.In like manner; when being transmitted between this cover sheet 21 and this shielding layer 22 by the second ultrasound wave 27 pointed or other touch objects feed back; because the acoustic impedance of this first matching layer 23 and this second matching layer 231 is between this cover sheet 11 and acoustic impedance of this shielding layer 12, reflection loss when this second ultrasound wave 17 is delivered to this shielding layer 22 by this cover sheet 21 therefore effectively can be reduced.
This first matching layer 23 forms stepped protruding 232 with the two ends of this second matching layer 231 on this cover sheet 21.These shielding layer 22 two ends have the first thickness H1, and this shielding layer 22 has the second thickness H2 at the two ends of this first matching layer 23, and this shielding layer 22 has the 3rd thickness H3 on this second matching layer 231.This first thickness H1 is greater than this second thickness H2, and this second thickness H2 is greater than the 3rd thickness H3.The difference of this first thickness H1 and this second thickness H2 is the thickness of this first matching layer 23, and the difference of this second thickness H2 and the 3rd thickness H3 is the thickness of this second matching layer 231.Cover this fingerprint recognition sensor 25 and fit in this shielding layer 22 away from this cover sheet 21 side through this colloid layer 24.The acoustic impedance of this cover sheet 21, this first matching layer 23, this second matching layer 231 and this shielding layer 22 reduces successively.
This first matching layer 23 is 1-10 micron with the thickness sum of this second matching layer 231, and preferably this first matching layer 23 is 1-5 micron with the thickness sum of this second matching layer 231.
In the present embodiment, this cover sheet 21 may be, but not limited to, sapphire glass cover plate, quartz glass cover plate, resin cover plate etc.This colloid layer 14 can be optic-solidified adhesive, as UV glue.
See also Fig. 4, Fig. 4 is the vertical view of the fingerprint identification device 20 shown in Fig. 3.The size of this shielding layer 22, this first matching layer 23, this second matching layer 231 and this fingerprint recognition sensor 25 reduces successively.Particularly; this shielding layer 22, this first matching layer 23, second matching layer 231 and the projection of this fingerprint recognition sensor 25 on this cover sheet 21 are rectangle; and the projection of this cover sheet 21 is greater than the projection of this shielding layer 22; the projection of this shielding layer 22 is greater than the projection of this first matching layer 23; the projection of this first matching layer 23 is greater than the projection of this second matching layer 231, and the projection of this second matching layer 231 is greater than the projection of this fingerprint recognition sensor 25.
Above-mentioned fingerprint identification device arranges matching layer between cover sheet and shielding layer; and the acoustic impedance of this cover sheet, this matching layer and this shielding layer reduces successively; thus the acoustic loss that can effectively reduce when ultrasound wave transmits between this cover sheet and this shielding layer, improve the precision of fingerprint recognition.
Above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not depart from the spirit and scope of technical solution of the present invention.
Claims (12)
1. a fingerprint identification device, comprising:
Cover sheet;
Shielding layer is arranged on the side of this cover sheet;
At least one matching layer is arranged between this shielding layer and this cover sheet;
Fingerprint recognition sensor is fitted in this shielding layer away from this cover sheet side, and this fingerprint recognition sensor is for performing fingerprint recognition action;
It is characterized in that, the acoustic impedance of this at least one matching layer is between this cover sheet and this shielding layer, and this at least one matching layer is decayed for the signal transmission reduced between this shielding layer and this cover sheet.
2. fingerprint identification device as claimed in claim 1, it is characterized in that, the quantity of this at least one matching layer is one deck, and the acoustic impedance of this cover sheet is greater than the acoustic impedance of this matching layer, and the acoustic impedance of this matching layer is greater than the acoustic impedance of this shielding layer.
3. fingerprint identification device as claimed in claim 2, it is characterized in that, this shielding layer covers this matching layer, these shielding layer two ends have the first thickness, this shielding layer has the second thickness on this matching layer, this first thickness is greater than this second thickness, and the difference of this first thickness and this second thickness is the thickness of this matching layer.
4. fingerprint identification device as claimed in claim 2, it is characterized in that, the thickness of this matching layer is 1-10 micron.
5. fingerprint identification device as claimed in claim 4, it is characterized in that, the thickness of this matching layer is 1-5 micron.
6. fingerprint identification device as claimed in claim 2, it is characterized in that, the size of this cover sheet, this shielding layer, this matching layer and this fingerprint recognition sensor reduces successively.
7. fingerprint identification device as claimed in claim 6; it is characterized in that; this shielding layer, this matching layer and this projection of fingerprint recognition sensor on this cover sheet are rectangle; and the projection of this cover sheet is greater than the projection of this shielding layer; the projection of this shielding layer is greater than the projection of this matching layer, and the projection of this matching layer is greater than the projection of this fingerprint recognition sensor.
8. fingerprint identification device as claimed in claim 1, it is characterized in that, this fingerprint identification device comprises the first matching layer and the second matching layer is cascading between this shielding layer and this cover sheet; This first matching layer fit this cover sheet arrange, this second matching layer is arranged between this first matching layer and this shielding layer.
9. fingerprint identification device as claimed in claim 8; it is characterized in that; the acoustic impedance of this cover sheet is greater than the acoustic impedance of this first matching layer, and the acoustic impedance of this first matching layer is greater than the acoustic impedance of this second matching layer, and the acoustic impedance of this second matching layer is greater than the acoustic impedance of this shielding layer.
10. fingerprint identification device as claimed in claim 8, it is characterized in that, the thickness sum of this first matching layer and this second matching layer is 1-10 micron.
11. fingerprint identification devices as claimed in claim 10, is characterized in that, the thickness sum of this first matching layer and this second matching layer is 1-5 micron.
12. fingerprint identification devices as claimed in claim 8; it is characterized in that; this shielding layer, this first, second matching layer and this projection of fingerprint recognition sensor on this cover sheet are rectangle; and the projection of this cover sheet is greater than the projection of this shielding layer; the projection of this shielding layer is greater than the projection of this first matching layer; the projection of this first matching layer is greater than the projection of this second matching layer, and the projection of this second matching layer is greater than the projection of this fingerprint recognition sensor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510183238.7A CN104866813A (en) | 2015-04-17 | 2015-04-17 | Fingerprint identification device |
| TW105101783A TWI582453B (en) | 2015-04-17 | 2016-01-20 | Fingerprint identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510183238.7A CN104866813A (en) | 2015-04-17 | 2015-04-17 | Fingerprint identification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104866813A true CN104866813A (en) | 2015-08-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510183238.7A Pending CN104866813A (en) | 2015-04-17 | 2015-04-17 | Fingerprint identification device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104866813A (en) |
| TW (1) | TWI582453B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105447470A (en) * | 2015-12-02 | 2016-03-30 | 麦克思商务咨询(深圳)有限公司 | Electronic apparatus |
| CN106056099A (en) * | 2016-06-23 | 2016-10-26 | 京东方科技集团股份有限公司 | Fingerprint identification display panel and display device |
| CN108140106A (en) * | 2015-09-24 | 2018-06-08 | 高通股份有限公司 | For the receiving side beam forming of ultrasonography sensor |
| CN109492491A (en) * | 2017-09-12 | 2019-03-19 | 南昌欧菲生物识别技术有限公司 | Ultrasonic fingerprint identifies mould group and electric equipment manufacturing method |
| CN109691129A (en) * | 2016-09-09 | 2019-04-26 | Ａｇｃ株式会社 | Cover element, the portable information terminal with the cover element and display device |
| CN109948496A (en) * | 2019-03-12 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition device and display device |
| CN107247939B (en) * | 2017-06-16 | 2020-10-23 | 业泓科技(成都)有限公司 | Acoustic wave type fingerprint identification device and electronic device |
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| CN108241830A (en) * | 2016-12-23 | 2018-07-03 | 创智能科技股份有限公司 | Biometric recognition device.It |
| CN108647586B (en) * | 2018-04-19 | 2021-06-22 | 业成科技（成都）有限公司 | Display device |
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| CN113253879A (en) * | 2016-09-09 | 2021-08-13 | Ａｇｃ株式会社 | Cover member, portable information terminal having the same, and display device |
| CN113253879B (en) * | 2016-09-09 | 2023-08-15 | Ａｇｃ株式会社 | Cover member, portable information terminal having the same, and display device |
| CN107247939B (en) * | 2017-06-16 | 2020-10-23 | 业泓科技(成都)有限公司 | Acoustic wave type fingerprint identification device and electronic device |
| CN109492491A (en) * | 2017-09-12 | 2019-03-19 | 南昌欧菲生物识别技术有限公司 | Ultrasonic fingerprint identifies mould group and electric equipment manufacturing method |
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| CN109948496A (en) * | 2019-03-12 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition device and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI582453B (en) | 2017-05-11 |
| TW201640138A (en) | 2016-11-16 |
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Effective date of registration: 20180814 Address after: No. 689, cooperative road, hi-tech West District, Chengdu, Sichuan Applicant after: Cheng Cheng Technology (Chengdu) Co., Ltd. Applicant after: Interface Optoelectronic (Shenzhen) Co., Ltd. Address before: Corvette Trust Services, 30 Castro Street, Vickhansky 1, Lodetown, Tortola, British Virgin Islands Applicant before: Mike thinks incorporated company |
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Application publication date: 20150826 |