CN203616766U - An optical fingerprint acquisition apparatus and a portable electronic apparatus - Google Patents
An optical fingerprint acquisition apparatus and a portable electronic apparatus Download PDFInfo
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- CN203616766U CN203616766U CN201320838454.7U CN201320838454U CN203616766U CN 203616766 U CN203616766 U CN 203616766U CN 201320838454 U CN201320838454 U CN 201320838454U CN 203616766 U CN203616766 U CN 203616766U
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- 238000003384 imaging method Methods 0.000 claims description 6
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Abstract
The utility model discloses an optical fingerprint acquisition apparatus and a portable electronic apparatus. The optical fingerprint acquisition apparatus comprises a fingerprint acquisition membrane arranged in the internal portion of a finger fingerprint contact surface, a plurality of sensor module groups arranged below the fingerprint acquisition membrane correspondingly and respectively acquiring partial information of fingerprint image information so as to reduce distances from a finger fingerprint to the a plurality of image sensors. The thickness of the optical fingerprint acquisition apparatus of the utility model is relatively small.
Description
Technical field
The utility model relates to image processing field, relates in particular to a kind of optical fingerprint acquisition apparatus and a kind of portable electron device.
Background technology
Optical fingerprint sensor has utilized refraction and the principle of reflection of light, to there is total reflection in the light of penetrating on finger surface crestal line (jut between streakline), reflected light is projected onto on imageing sensor, form black image, and penetrate light on finger valley line (sunk part between streakline) by finger, form white image, thereby optical fingerprint sensor will capture light and dark many gray-scale fingerprint images.
Existing optical fingerprint sensor mainly comprises three parts: LED light source, right-angle prism, cmos sensor.As shown in Figure 1, finger 13 is placed on right-angle prism 12, under LED light source 14 irradiates, light, from bottom directive right-angle prism 12, arrives the upper surface of right-angle prism 12, namely lets go and refers to 13 surface.If the position that light beam arrives at is finger crestal line, light beam will form inner full-reflection, spreads out of from the another side of right-angle prism 12, arrives cmos image sensor 11.If the position that light beam arrives at is finger valley line, light beam will be absorbed by the skin of finger 13.
The thickness of existing optical fingerprint sensor is at least 10-12mm.Along with the application of mobile payment, Internet of Things authentication is burning hot gradually, if in the mobile fields such as mobile phone employing fingerprint authentication, must be by the THICKNESS CONTROL of optical finger print device below 6mm.At present, only have semi-conductor electricity perhaps inductance type transducer can reach this requirement, but semi-conductor electricity perhaps the cost of inductance type transducer is high, for scale of mass production causes obstacle.
Therefore, how to reduce the thickness of optical fingerprint sensor, become those skilled in the art's technical barrier urgently to be resolved hurrily.
Utility model content
Technical problem to be solved in the utility model is the optical fingerprint acquisition apparatus that how to provide a kind of thickness little.
In order to address the above problem, the utility model provides a kind of optical fingerprint acquisition apparatus, comprising:
Fingerprint collecting film, is arranged at the inside of finger print surface in contact;
Multiple imageing sensor modules, correspondence is arranged at the bottom of described fingerprint collecting film, is suitable for the partial information that gathers respectively described information in fingerprint, to reduce finger print to the distance between multiple imageing sensors.
Alternatively, described fingerprint collecting film is: transparent or semitransparent material.
Alternatively, when described multiple imageing sensor modules are A, compared with adopting single image sensor module, described multiple imageing sensor modules to the distance of finger print is the 1/A of single image sensor module to finger print distance; Wherein, A is more than or equal to 2 natural number.
Alternatively, process information in fingerprint or external circuit resume module information in fingerprint by described multiple imageing sensor modules, the fingerprint image data that output generates after processing.
Alternatively, described imageing sensor module comprises wafer scale optical lens.
Alternatively, the focal range of described wafer scale optical lens comprises 0.1mm~2mm.
Alternatively, described imageing sensor module comprises optoelectronic component array, picture signal supplementary module, picture signal read module and picture signal processing module;
Described optoelectronic component array is for generation of fingerprint image signal;
Described picture signal supplementary module is used for controlling described picture signal read module and reads described fingerprint image signal, also for transmitting described fingerprint image signal to described picture signal processing module;
Described picture signal processing module is for the treatment of described fingerprint image signal, also for export described fingerprint image data according to result.
Alternatively, described picture signal read module comprises:
Row address decoding module, electricity is connected in described picture signal supplementary module, for receiving the instruction of described picture signal supplementary module, also for read described fingerprint image signal in the time receiving described instruction;
Column address decoding module, electricity connects described picture signal processing module, for described fingerprint image signal being transferred to described picture signal processing module.
Alternatively, described picture signal processing module comprises programmable amplifier, analog-digital converter and the imaging signal processing circuit that electricity connects in turn.
Alternatively, described device also comprises:
Information process unit, for receiving described fingerprint image data, and the described fingerprint image data generating after processing according to multiple described imageing sensors generates fingerprint image or fingerprint recognition information.
Alternatively, multiple described imageing sensor modules be N capable × array of M row arranges, wherein N is greater than or equal to 1 natural number, M is greater than or equal to 1 natural number, and N equals 1 when different with M.
The present invention also provides a kind of portable electron device, comprises above-mentioned optical fingerprint acquisition apparatus.
Compared with prior art, the technical solution of the utility model has the following advantages:
The utility model has omitted the right-angle prism in conventional fingerprint sensor, adopts collection film directly finger print to be carried out to Image Acquisition, thereby has saved the shared thickness of right-angle prism; Adopt array imageing sensor module, each module carries out part imaging to fingerprint, thereby makes to gather film and imageing sensor module can draw closer together.Therefore, optical fingerprint acquisition apparatus thickness of the present utility model is little.
Accompanying drawing explanation
Fig. 1 is the structural representation of optical fingerprint acquisition apparatus one prior art;
Fig. 2 is the structural representation of optical fingerprint acquisition apparatus one embodiment of the present utility model;
Fig. 3 is the vertical view of imageing sensor module embodiment illustrated in fig. 2;
Fig. 4 is the side view of imageing sensor module embodiment illustrated in fig. 2;
Fig. 5 is result schematic diagram embodiment illustrated in fig. 2.
Embodiment
A lot of details are set forth in the following description so that fully understand the utility model.But the utility model can be implemented to be much different from alternate manner described here, and those skilled in the art can do similar popularization without prejudice to the utility model intension in the situation that, and therefore the utility model is not subject to the restriction of following public concrete enforcement.
Secondly, the utility model utilizes schematic diagram to be described in detail, and in the time that the utility model embodiment is described in detail in detail, for ease of explanation, described schematic diagram is example, and it should not limit at this scope that the utility model is protected.
After deliberation, inventor finds: the optical fingerprint acquisition apparatus of prior art is thicker, and main cause is to obtain fingerprint image by the reflection of right-angle prism.Because right-angle prism itself just has certain thickness, so limited to a certain extent the thickness of optical fingerprint acquisition apparatus.And in order to obtain the complete image reflecting, must guarantee the distance long enough between right-angle prism and cmos image sensor, this has further limited again the thickness of optical fingerprint acquisition apparatus.
In order to solve the technical matters in background technology, inventor has abandoned the reflection of traditional right-angle prism, has proposed another and directly obtain the optical fingerprint acquisition apparatus of fingerprint image.
The utility model provides a kind of optical fingerprint acquisition apparatus.Fig. 2 is the structural representation of optical fingerprint acquisition apparatus one embodiment of the present utility model.As shown in Figure 2, the present embodiment comprises: fingerprint collecting film 11, multiple imageing sensor module 12, light source 13 and information process unit 14.
Described fingerprint collecting mould 11 is positioned at the top layer of described optical fingerprint acquisition apparatus, is arranged at the inside of finger print surface in contact.Finger print 10 presses on described fingerprint collecting film 11 surfaces, shows information in fingerprint in described fingerprint collecting film 11 surfaces.
Described fingerprint collecting mould 11 can be transparent or translucent material, for by the irradiation of extraneous light.In the present embodiment, described extraneous light provides by the light source 13 that is placed in described optical fingerprint acquisition apparatus inside, but the utility model is not done concrete restriction to this.In other embodiments, described extraneous light can also be provided by other modes, such as: be placed in light source outside described optical fingerprint acquisition apparatus etc.
Described imageing sensor module 12 is array arranges, and is disposed at the below of described fingerprint collecting film 11.The image information that each imageing sensor module 12 obtains described fingerprint collecting film 11 is carried out part imaging, and exports fingerprint image data.In the present embodiment, described imageing sensor module 12 is the array of 2 row × 3 row and arranges.It is to be noted, in each imageing sensor module in the present embodiment, include image sensor chip, image sensor chip is made up of the image sensor cell (pixel) of some array arrangements, each image sensor cell by photoelectric conversion unit (PD, Photodiode) and 3T(Transistor) or 4T(Transistor) structure forms.
Because each imageing sensor module 12 only needs the image information of part to process, so can shorten the distance of described imageing sensor module 12 and described fingerprint collecting film 11.Particularly, in the time that described imageing sensor module 12 is A (A is more than or equal to 2 natural number), compared with adopting single image sensor module, each imageing sensor module 12 to the distance of finger print is the 1/A of single image sensor module to finger print distance.In the present embodiment, 6 imageing sensor modules 12 are adopted, so each imageing sensor module 12 to the distance of fingerprint collecting mould 11 is to adopt 1 imageing sensor module 12 to 1/6 of fingerprint collecting mould 11 distances.
The present embodiment also comprises: the information process unit 14 that is positioned at multiple imageing sensor modules 12 belows, for receiving the fingerprint image data that each imageing sensor module 12 is exported, each fingerprint image data is spliced, finally export complete fingerprint image or fingerprint recognition information.
It should be noted that, although in the present embodiment, in described optical fingerprint acquisition apparatus inside, configuration breath processing unit 14 splices each fingerprint image data.But it will be appreciated by those skilled in the art that, in other embodiments, described information process unit 14 can be also the independent circuits that is disposed at described optical fingerprint acquisition apparatus outside, or in described imageing sensor module 12 inside, the utility model is not done concrete restriction to this by the Circnit Layout of realizing splicing fingerprint image data function.
The utility model is not done concrete restriction to the position of described information process unit 14 yet.In the present embodiment, described information process unit 14 is positioned at the below of multiple imageing sensor modules 12.In other embodiments, can determine according to the layout of overall chip the correct position of information process unit 14.
Fig. 3 is the vertical view of imageing sensor module embodiment illustrated in fig. 2.As shown in Figure 3, in the present embodiment, described imageing sensor module 12 is the array of 2 row × 3 row and arranges.Interval between each imageing sensor module 12 equates.Owing to including optical lens in described imageing sensor module 12, the fingerprint image data that can make to be formed on imageing sensor module 12 by light refraction is less than the information in fingerprint that is formed on described fingerprint collecting film 11 surfaces.At described imageing sensor module 12 edges, a small amount of fingerprint image data that may lose also can adopt the existing algorithm completions such as numerical interpolation in follow-up Image Mosaics.
It should be noted that, the utility model adopts multiple imageing sensor modules 12, multiple imageing sensor modules 12 be N capable × array of M row arranges, wherein N is greater than or equal to 1 natural number, M is greater than or equal to 1 natural number, and N equals 1 when different with M.
Fig. 4 is the side view of imageing sensor module embodiment illustrated in fig. 2.As shown in Figure 4, in the present embodiment, described imageing sensor module 12 comprises: wafer scale optical lens 121, optoelectronic component array 122, picture signal supplementary module 123, picture signal read module 124 and picture signal processing module 125.
Described wafer scale optical lens 121 is positioned at described fingerprint collecting film 11 belows, for the information in fingerprint that is presented at described fingerprint collecting film 11 surfaces is projected to described optoelectronic component array 122.Can, by controlling the distance of described fingerprint collecting film 11 and described wafer scale optical lens 121 and controlling the distance of described wafer scale optical lens 121 and described optoelectronic component array 122, guarantee the information in fingerprint collecting to project on described optoelectronic component array 122.
In order to control the integral thickness of described optical fingerprint acquisition apparatus, make it to be applicable to portable electron device, the focal range of described wafer scale optical lens 121 is between 0.1mm~2mm.
Described optoelectronic component array 122 is positioned at described wafer scale optical lens 121 belows, for generation of fingerprint image signal.
Described picture signal supplementary module 123 is positioned at described optoelectronic component array 122 belows, reads described fingerprint image signal for controlling described picture signal read module 124, also for transmitting described fingerprint image signal to described picture signal processing module 125.
Described picture signal read module 124 is positioned at described picture signal supplementary module 123 belows, for reading described fingerprint image signal.Particularly, described picture signal read module 124 comprises: row address decoding module (not shown) and column address decoding module (not shown).
Described row address decoding module, electricity is connected in described picture signal supplementary module 123, for receiving the instruction of described picture signal supplementary module 123, reads described fingerprint image signal in the time receiving described instruction.
Described column address decoding module, electricity connects described picture signal processing module 125, for described fingerprint image signal being transferred to described picture signal processing module 125.
Described picture signal processing module 125 is positioned at described picture signal read module 124 belows, for the treatment of described fingerprint image signal, exports described fingerprint image data according to result.Particularly, described picture signal processing module 125 comprises programmable amplifier, analog-digital converter and the imaging signal processing circuit that electricity connects in turn.
It should be noted that, the utility model is not done concrete restriction to the position of described picture signal supplementary module 123, described picture signal read module 124 and described picture signal processing module 125.In the present embodiment, described optoelectronic component array 122, described picture signal supplementary module 123, described picture signal read module 124 and described picture signal processing module 125 are stacking from top to bottom successively.In other embodiments, can determine according to the layout of overall chip the correct position of described picture signal supplementary module 123, described picture signal read module 124 and described picture signal processing module 125.
It will be appreciated by those skilled in the art that, can encapsulate described wafer scale optical lens 121, described optoelectronic component array 122, described picture signal supplementary module 123, described picture signal read module 124 and described picture signal processing module 125 by existing encapsulation technology, make it to form independently imageing sensor module 12.Can also encapsulate described fingerprint collecting film 11, described array imageing sensor module 12, described light source 13 and described information process unit 14 by existing encapsulation technology, make it to form independently optical fingerprint acquisition apparatus.Do not repeat them here.
Fig. 5 is result schematic diagram embodiment illustrated in fig. 2.As shown in Figure 5, the fingerprint image of final output is formed by 6 local fingerprint Image Mosaics.A local fingerprint image corresponding to each imageing sensor module 12 output.Described information process unit 14 splices 6 local fingerprint images, finally exports complete fingerprint image.It will be understood by those skilled in the art that existing multiple prior art can realize the splicing of topography, does not repeat them here.
The optical fingerprint acquisition apparatus of the present embodiment has been abandoned traditional right-angle prism, adopts collection film directly finger print to be carried out to Image Acquisition, thereby has saved the shared thickness of right-angle prism.Also adopt array imageing sensor module, each module carries out part imaging to fingerprint, thereby makes to gather film and imageing sensor module can draw closer together, and then makes the integral thickness of optical fingerprint acquisition apparatus less.
The utility model can be used in numerous general or special purpose computingasystem environment or configuration.For example: personal computer, server computer, handheld device or portable set, plate equipment, multicomputer system, system, set top box, programmable consumer-elcetronics devices, network PC, small-size computer, mainframe computer based on microprocessor, comprise the distributed computing environment of above any system or equipment etc.
The utility model also provides a kind of portable electron device (not shown), comprises described optical fingerprint acquisition apparatus.Described portable electron device can be smart mobile phone, portable computer, PDA etc., and the utility model is not done concrete restriction to this.
Although the utility model with preferred embodiment openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope of the present utility model; can utilize method and the technology contents of above-mentioned announcement to make possible variation and modification to technical solutions of the utility model; therefore; every content that does not depart from technical solutions of the utility model; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present utility model, all belong to the protection domain of technical solutions of the utility model.
Claims (12)
1. an optical fingerprint acquisition apparatus, is characterized in that, comprising:
Fingerprint collecting film, is arranged at the inside of finger print surface in contact;
Multiple imageing sensor modules, correspondence is arranged at the bottom of described fingerprint collecting film, is suitable for the partial information that gathers respectively described information in fingerprint, to reduce finger print to the distance between multiple imageing sensors.
2. optical fingerprint acquisition apparatus according to claim 1, is characterized in that, described fingerprint collecting film is: transparent or semitransparent material.
3. optical fingerprint acquisition apparatus according to claim 1, it is characterized in that, when described multiple imageing sensor modules are A, compared with adopting single image sensor module, described multiple imageing sensor modules to the distance of finger print is the 1/A of single image sensor module to finger print distance; Wherein, A is more than or equal to 2 natural number.
4. optical fingerprint acquisition apparatus according to claim 1, is characterized in that, processes information in fingerprint or external circuit resume module information in fingerprint by described multiple imageing sensor modules, the fingerprint image data that output generates after processing.
5. optical fingerprint acquisition apparatus according to claim 1, is characterized in that, described imageing sensor module comprises wafer scale optical lens.
6. optical fingerprint acquisition apparatus according to claim 5, is characterized in that, the focal range of described wafer scale optical lens comprises 0.1mm~2mm.
7. optical fingerprint acquisition apparatus according to claim 1, is characterized in that, described imageing sensor module comprises optoelectronic component array, picture signal supplementary module, picture signal read module and picture signal processing module;
Described optoelectronic component array is for generation of fingerprint image signal;
Described picture signal supplementary module is used for controlling described picture signal read module and reads described fingerprint image signal, also for transmitting described fingerprint image signal to described picture signal processing module;
Described picture signal processing module is for the treatment of described fingerprint image signal, also for export described fingerprint image data according to result.
8. optical fingerprint acquisition apparatus according to claim 7, is characterized in that, described picture signal read module comprises:
Row address decoding module, electricity is connected in described picture signal supplementary module, for receiving the instruction of described picture signal supplementary module, also for read described fingerprint image signal in the time receiving described instruction;
Column address decoding module, electricity connects described picture signal processing module, for described fingerprint image signal being transferred to described picture signal processing module.
9. optical fingerprint acquisition apparatus according to claim 7, is characterized in that, described picture signal processing module comprises programmable amplifier, analog-digital converter and the imaging signal processing circuit that electricity connects in turn.
10. optical fingerprint acquisition apparatus according to claim 1, is characterized in that, described device also comprises:
Information process unit, for receiving described fingerprint image data, and the described fingerprint image data generating after processing according to multiple described imageing sensors generates fingerprint image or fingerprint recognition information.
11. optical fingerprint acquisition apparatus according to claim 1, it is characterized in that, multiple described imageing sensor modules be N capable × array of M row arranges, wherein N is greater than or equal to 1 natural number, M is greater than or equal to 1 natural number, and N equals 1 when different with M.
12. 1 kinds of portable electron devices, comprise the optical fingerprint acquisition apparatus as described in any one in claim 1 to 11.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103699885A (en) * | 2013-12-18 | 2014-04-02 | 格科微电子(上海)有限公司 | Optical fingerprint collecting method, optical fingerprint collecting device and portable type electronic device |
CN104992158A (en) * | 2015-07-13 | 2015-10-21 | 格科微电子(上海)有限公司 | Method for improving optical fingerprint identification performance |
WO2018006478A1 (en) * | 2016-07-08 | 2018-01-11 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
CN109564625A (en) * | 2018-11-06 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Identification fingerprint method, fingerprint recognition system and electronic equipment based on double induction zones |
US20220004792A1 (en) * | 2019-03-04 | 2022-01-06 | Suzhou Mixosense Technology Ltd | Image sensor, preparation method thereof, image recognition method, and electronic apparatus |
-
2013
- 2013-12-18 CN CN201320838454.7U patent/CN203616766U/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103699885A (en) * | 2013-12-18 | 2014-04-02 | 格科微电子(上海)有限公司 | Optical fingerprint collecting method, optical fingerprint collecting device and portable type electronic device |
CN104992158A (en) * | 2015-07-13 | 2015-10-21 | 格科微电子(上海)有限公司 | Method for improving optical fingerprint identification performance |
WO2018006478A1 (en) * | 2016-07-08 | 2018-01-11 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
CN109564625A (en) * | 2018-11-06 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Identification fingerprint method, fingerprint recognition system and electronic equipment based on double induction zones |
WO2020093251A1 (en) * | 2018-11-06 | 2020-05-14 | 深圳市汇顶科技股份有限公司 | Double sensing area-based fingerprint identification method, fingerprint identification system, and electronic device |
US20220004792A1 (en) * | 2019-03-04 | 2022-01-06 | Suzhou Mixosense Technology Ltd | Image sensor, preparation method thereof, image recognition method, and electronic apparatus |
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Effective date of registration: 20190104 Address after: 201203 Room 1003, Building 2, 560 Midsummer Road, Pudong New Area, Shanghai Patentee after: SILEAD Inc. Address before: 201203 11F, No. 2 Building, 560 Lane, Midsummer Road, Pudong New Area, Shanghai Patentee before: GALAXYCORE SHANGHAI Ltd.,Corp. |
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Granted publication date: 20140528 |