CN205334500U - Miniaturized fingerprint identification prism and fingerprint identification device - Google Patents
Miniaturized fingerprint identification prism and fingerprint identification device Download PDFInfo
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- CN205334500U CN205334500U CN201521097462.6U CN201521097462U CN205334500U CN 205334500 U CN205334500 U CN 205334500U CN 201521097462 U CN201521097462 U CN 201521097462U CN 205334500 U CN205334500 U CN 205334500U
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- prism
- fingerprint identification
- miniaturization
- identification device
- guide plate
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Abstract
The utility model discloses a miniaturized fingerprint identification prism, the prism is the dove prism, the dove prism includes prism incident surface, prism side, points face placed and prism emitting face, the contained angle that the finger was placed between face and the prism side is 38, still disclose a miniaturized fingerprint identification device, including light source, light guide plate, miniaturized fingerprint identification prism and sensitization device, the light that the light source sent passes through the light guide plate and gets into small -size fingerprint identification prism, and then throw on the sensitization device, the sensitization device is 16.5 inches sensitization device. The volume that contained angle angle between face and the prism emitting face reduces the prism is placed through changing the prism finger to miniaturized fingerprint identification prism, miniaturized fingerprint identification device is including miniaturized fingerprint identification prism to adopt the large size sensitization device, shortened fingerprint collection's light path, reduced fingerprint identification device's volume. The utility model discloses but wide application in various fingerprint sampler.
Description
Technical field
This utility model relates to optical pickup, particularly relates to a kind of miniaturization fingerprint recognition prism and fingerprint identification device。
Background technology
PMMA material: also known as acryl or lucite, has the high grade of transparency, low price, it is easy to the advantages such as machining, is usually commonly used glass substitution material。
Fingerprint acquisition device is to utilize the fingerprint of people to have different feature to carry out a kind of precision electronic device of identification, and operation principle includes gathering fingerprint image, the feature that takes the fingerprint, preserving data and carry out four functions of fingerprint comparison。Wherein reading fingerprint image is the most basic most important function of fingerprint capturer。By utilizing the rough stricture of vagina shape of finger print to carry out imaging, generally we call the stricture of vagina shape protruded " ridge ", and sunk stricture of vagina is formed and is called " valley ", and on the process nature of fingerprint collecting are the process of fingerprint imaging。
In the prior art, owing to the lateral area of fingerprint acquisition device is bigger, and there is base, cause that the volume of whole fingerprint acquisition device is bigger, narrow gap cannot be embedded use, the development trend of modern society's precision process cannot be adapted to, it is provided that the fingerprint acquisition device of a kind of miniaturization is particularly important。
Utility model content
In order to solve above-mentioned technical problem, the purpose of this utility model is to provide a kind of miniaturization fingerprint recognition prism, the angle Angulation changes of described miniaturization fingerprint recognition prism so that the lateral area of prism diminishes, and then reduces the volume of prism。
Another object of the present utility model is to provide a kind of miniaturization fingerprint identification device, described miniaturization fingerprint identification device includes the miniaturization fingerprint recognition prism that lateral area changes, and adopt large-sized sensor devices, shorten the light path of fingerprint collecting, and then reduce the volume of fingerprint identification device。
This utility model be the technical scheme is that a kind of miniaturization fingerprint recognition prism, described prism is Dove prism, described Dove prism includes prism incidence face, prism side, finger placed side and prism exit facet, and the angle between described finger placed side and prism side is 38 °。
What this utility model adopted another solution is that a kind of miniaturization fingerprint identification device, including light source, light guide plate, miniaturization fingerprint recognition prism and sensor devices, the light that described light source sends enters described small fingerprint identification prism by light guide plate, and then it being incident upon on described sensor devices, described sensor devices is the sensor devices of 1/6.5 inch。
Further, described sensor devices is CMOS。
Further, described light guide plate is Wedge shape light conduction board, and described Wedge shape light conduction board includes the guide-lighting plane of incidence, reflecting surface and guide-lighting exit facet, the described guide-lighting plane of incidence and light source docking, described guide-lighting exit facet and the docking of prism incidence face。
Further, described miniaturization fingerprint identification device also includes pcb board, and described light source and sensor devices are arranged on pcb board, and the lower zone of described prism exit facet is placed with the lens for collecting light。
Further, the protection glass of printing opacity it is provided with between described lens and photo-sensitive cell。
Further, described light guide plate is the semi-transparent light guide plate of frosted, and the reflecting surface of described light guide plate is through shining the reflecting surface that stricture of vagina processes。
Further, described light guide plate adopts PMMA material to make。
Further, described light source is LED。
The beneficial effects of the utility model are: the miniaturization fingerprint recognition prism in this utility model is by changing the angle angle between prism finger placed side and prism exit facet so that the lateral area of prism diminishes, and then the volume of prism is diminished。
Of the present utility model another provides the benefit that: the miniaturization fingerprint identification device in this utility model includes the miniaturization fingerprint recognition prism that lateral area changes, and adopt large-sized sensor devices, shorten the light path of fingerprint collecting, and then reduce the volume of fingerprint identification device。
This utility model can be widely applied to various fingerprint capturer。
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
Fig. 1 is the internal structure schematic diagram of an embodiment of a kind of miniaturization fingerprint identification device in this utility model；
Fig. 2 is the internal structure side view of an embodiment of a kind of miniaturization fingerprint identification device in this utility model；
Fig. 3 is the structural side view of an embodiment of a kind of miniaturization fingerprint identification device in this utility model；
Fig. 4 is the structure front view of an embodiment of a kind of miniaturization fingerprint identification device in this utility model；
Fig. 5 is the axonometric chart of an embodiment of a kind of miniaturization fingerprint identification device in this utility model。
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined。
As depicted in figs. 1 and 2, a kind of miniaturization fingerprint recognition prism 10, described prism 10 is Dove prism 10, described Dove prism 10 includes prism side 11, finger placed side 12, prism incidence face 13 and prism exit facet 14, with reference to Fig. 3, the angle between described finger placed side 12 and prism side 11 is 38 °。
Owing to the angle between described finger placed side 12 and prism side 11 diminishes, the volume of described miniaturization fingerprint recognition prism 10 diminishes, and is suitable for embedding narrow space and uses。
A kind of miniaturization fingerprint identification device, with reference to Fig. 1 and Fig. 2, including miniaturization fingerprint recognition prism 10, light guide plate 20, light source 30 and sensor devices 50, the light 80 that described light source 30 sends enters described small fingerprint identification prism 10 by light guide plate 20, and then it being incident upon on described sensor devices 50, described sensor devices 50 is the sensor devices 50 of 1/6.5 inch。
Further, described sensor devices 50 is CMOS。
It is low that CMOS has cost, advantage low in energy consumption。
Further, since adopt the miniaturization fingerprint identification device 10 of volume-diminished, the volume of described miniaturization fingerprint identification device is reduced；And owing to have employed the sensor devices 50 of large-size, light 80 projects sensor devices 50 desired path and shortens, and namely light path shortens, and is reduced the volume of fingerprint identification device further。
Further, described light guide plate 20 is Wedge shape light conduction board 20, and described Wedge shape light conduction board 20 includes the guide-lighting plane of incidence 21, reflecting surface 22 and guide-lighting exit facet 23, and the described guide-lighting plane of incidence 21 and light source 30 dock, and described guide-lighting exit facet 23 and prism incidence face 13 are docked。Docking described here can be the docking of contact, it is also possible to be contactless, only close docking。
Further, described light guide plate 20 is the semi-transparent light guide plate 20 of frosted, and the reflecting surface 22 of described light guide plate 20 is through shining the reflecting surface 22 that stricture of vagina processes。
Light 80 is through frosted semi-transparent light guide plate 20 scattering, and the reflecting surface 22 that light 80 processes through shining stricture of vagina can produce reflection。(in figure, light 80 part is not shown)
Wherein, after the light 80 sent when light source 30 enters light guide plate 20 by the guide-lighting plane of incidence 21, scattering is produced in light guide plate 20, the light of scattering arrives reflecting surface 22 major part and produces reflection, therefore major part light 80 can only penetrate from guide-lighting exit facet 23, and then enter prism 10 by prism incidence face 13, arrive finger placed side 12。When not having finger to block, light 80 penetrates from finger placed side 12, owing to light 80 becomes soft after the scattering of light guide plate 20 processes, will not feel dazzling when therefore user looks at straight；When there being finger to block, light 80 penetrates through the prism exit facet 14 that reflexes to of finger print。
Further, described miniaturization fingerprint identification device also includes pcb board 40, and described light source 30 and sensor devices 50 are arranged on pcb board, and the lower zone of described prism exit facet 14 is placed with the lens 60 for collecting light。
Wherein, the light 80 of prism exit facet 14 injection gathers through lens 60, through overprotection glass 70 transmission, is entering sensor devices 50。
Further, the protection glass 70 of printing opacity it is provided with between described lens 60 and photo-sensitive cell 50。Protection glass 70 is used for protecting sensor devices 50。
Further, described light guide plate adopts PMMA material to make。The advantage that PMMA material has high light transmittance, low cost。
Further, described light source is LED。
It can be one or more LED。Cost is low, the advantage of life-span length to adopt LED to have。
With reference to Fig. 3 to Fig. 5, described miniaturization fingerprint identification device includes housing and prism, the length of described miniaturization fingerprint identification device entirety is 17.39mm, width is 14.01mm, height is 33.80mm, have relative to conventional fingerprint identification device overall volume and significantly reduced, be suitable for narrow installation space environment。
It is above of the present utility model preferably enforcement has been illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the premise without prejudice to this utility model spirit, and these equivalent deformation or replacement are all contained in the application claim limited range。
Claims (9)
1. a miniaturization fingerprint recognition prism, it is characterised in that: described prism is Dove prism, and described Dove prism includes prism incidence face, prism side, finger placed side and prism exit facet, and the angle between described finger placed side and prism side is 38 °。
2. a miniaturization fingerprint identification device, it is characterized in that: include miniaturization fingerprint recognition prism and sensor devices described in light source, light guide plate, claim 1, the light that described light source sends enters described small fingerprint identification prism by light guide plate, and then it being incident upon on described sensor devices, described sensor devices is the sensor devices of 1/6.5 inch。
3. miniaturization fingerprint identification device according to claim 2, it is characterised in that: described sensor devices is CMOS。
4. miniaturization fingerprint identification device according to claim 2, it is characterized in that: described light guide plate is Wedge shape light conduction board, described Wedge shape light conduction board includes the guide-lighting plane of incidence, reflecting surface and guide-lighting exit facet, the described guide-lighting plane of incidence and light source docking, described guide-lighting exit facet and the docking of prism incidence face。
5. miniaturization fingerprint identification device according to claim 2, it is characterised in that: also including pcb board, described light source and sensor devices are arranged on pcb board, and the lower zone of described prism exit facet is placed with the lens for collecting light。
6. miniaturization fingerprint identification device according to claim 5, it is characterised in that: it is provided with the protection glass of printing opacity between described lens and photo-sensitive cell。
7. miniaturization fingerprint identification device according to claim 4, it is characterised in that: described light guide plate is the semi-transparent light guide plate of frosted, and the reflecting surface of described light guide plate is through shining the reflecting surface that stricture of vagina processes。
8. miniaturization fingerprint identification device according to claim 7, it is characterised in that: described light guide plate adopts PMMA material to make。
9. the miniaturization fingerprint identification device according to claim 2 to 8 any one, it is characterised in that: described light source is LED。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521097462.6U CN205334500U (en) | 2015-12-24 | 2015-12-24 | Miniaturized fingerprint identification prism and fingerprint identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521097462.6U CN205334500U (en) | 2015-12-24 | 2015-12-24 | Miniaturized fingerprint identification prism and fingerprint identification device |
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| Publication Number | Publication Date |
|---|---|
| CN205334500U true CN205334500U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521097462.6U Expired - Fee Related CN205334500U (en) | 2015-12-24 | 2015-12-24 | Miniaturized fingerprint identification prism and fingerprint identification device |
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| Country | Link |
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| CN (1) | CN205334500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108256416A (en) * | 2017-11-30 | 2018-07-06 | 北京集创北方科技股份有限公司 | Biological characteristic detection method and system |
| CN109637376A (en) * | 2019-01-31 | 2019-04-16 | 厦门天马微电子有限公司 | Display device |
-
2015
- 2015-12-24 CN CN201521097462.6U patent/CN205334500U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108256416A (en) * | 2017-11-30 | 2018-07-06 | 北京集创北方科技股份有限公司 | Biological characteristic detection method and system |
| CN109637376A (en) * | 2019-01-31 | 2019-04-16 | 厦门天马微电子有限公司 | Display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 Termination date: 20201224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |