CN106326803B - Fingerprint and palm print collector - Google Patents
Fingerprint and palm print collector Download PDFInfo
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- CN106326803B CN106326803B CN201510333582.XA CN201510333582A CN106326803B CN 106326803 B CN106326803 B CN 106326803B CN 201510333582 A CN201510333582 A CN 201510333582A CN 106326803 B CN106326803 B CN 106326803B
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- fingerprint
- light guide
- guide plate
- refractive index
- collector
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1312—Sensors therefor direct reading, e.g. contactless acquisition
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The application discloses a fingerprint and palmprint collector, which comprises a light guide plate, wherein a supporting layer for supporting the light guide plate is tightly attached to the lower surface of the light guide plate, and the refractive index n of the supporting layer 1 Less than the refractive index n of the finger and palm skin surface f The supporting layer is arranged on the image collector. The light guide plate supporting structure and the fingerprint and palmprint collector can solve the problem of the lamination of the light guide plate and other devices, not only provide effective support and solve the problem of pressure tolerance, but also enable light rays to be transmitted in the light guide plate with high efficiency.
Description
Technical Field
The application relates to the technical field of image acquisition, in particular to a fingerprint and palm print acquisition device.
Background
At present, the patent application document of patent application number 201410281380.0 proposes fingerprint collection equipment of a light guide plate and matrix type small hole imaging method, the patent application document of patent application number 201410280970.1 proposes fingerprint collection equipment of a light guide plate and a light emitter and a light receiver, and the patent application document of patent application number 201510046991.1 proposes fingerprint collection equipment of a light guide plate and a micropore channel.
All of the fingerprint acquisition devices assume that air is outside the upper and lower surfaces of the light guide plate. However, if the light guide plate is thin and has a large area, the structure is fragile, and the light guide plate is easily broken when pressed by fingers, and effective support is required.
Secondly, when we consider combining the light guide plate with other devices, for example, when using the whole mobile phone surface glass as the light guide plate, some changes need to be made to the bonding mode of the mobile phone surface glass and other devices under the glass, so that the light can be totally reflected and propagated in the light guide plate as much as possible. In the past, the surface glass of the mobile phone may be tightly adhered to other devices (such as touch screen and display screen) by transparent adhesive with higher refractive index, so that light cannot be efficiently transmitted in the light guide plate in a total reflection manner.
Disclosure of Invention
The application aims to provide a fingerprint and palm print collector which can solve the problem of the lamination of a light guide plate and other devices, not only provide effective support and solve the problem of pressure tolerance, but also enable light rays to propagate in the light guide plate with high efficiency.
In order to achieve the above object, the present application provides a fingerprint and palm print collector, comprising a light guide plate, a supporting layer for supporting the light guide plate is closely adhered under the light guide plate, and the refractive index n of the supporting layer 1 Less than the refractive index n of the finger and palm skin surface f The supporting layer is arranged on the image collector.
Further, the supporting layer comprises a plate body, a plurality of grooves are formed in the upper surface of the plate body or a plurality of cavities are formed in the surface of the plate body, and the refractive index n of the supporting layer is equal to that of the plate body 1 Is the average of the refractive index of the support layer material itself and the refractive index of the cavity or groove therein.
Further, a plurality of the cavities or the grooves are arranged in a dense matrix.
Further, the cavities are all elongated grid holes.
Further, the supporting layer is composed of a plurality of spacers arranged at intervals, and the refractive index n1 of the supporting layer is an average value of the refractive index of the supporting layer material and the refractive index of the cavity between the spacers.
Further, a plurality of the spacers are arranged in a matrix.
Further, the thickness of the support layer is 0.1 micrometers to 2 millimeters.
Further, the image collector comprises an orifice plate and an image sensor, wherein the orifice plate is arranged on the image sensor, and the supporting layer is arranged on the orifice plate.
Further, the display screen is further included, and the image collector is arranged on the display screen or in the display screen.
After the scheme is adopted, the application has the following beneficial effects:
1. the light guide plate is adhered to the image collector through the supporting layer, so that the problem is solvedThe problem that the prior light guide plate is easy to break when the fingers and the palms press and print is solved, and the refractive index n of the supporting layer is reduced 1 Is set to be smaller than the refractive index n of the finger and palm skin surface f The light is ensured to propagate in the light guide plate as far as possible, and most of optical paths of the light in the propagation process meet the condition of total reflection propagation;
2. the supporting layer is arranged at a position which is staggered with the imaging light path as far as possible, so that the propagation of imaging light rays is not damaged;
3. the supporting layer is arranged to be a plate body with a plurality of cavities or grooves on the surface or is formed by a plurality of gaskets arranged at intervals, so that the arrangement can provide effective support for the light guide plate, solve the problem of pressure tolerance, and ensure that the average value of the refractive index of the supporting layer and the refractive index of the cavities or grooves (namely the refractive index of the supporting layer) n is easy to ensure 1 Less than the refractive index n of the finger and palm skin surface f So that the light rays can be transmitted in the light guide plate with high efficiency.
Drawings
FIG. 1 is a schematic diagram of a fingerprint and palm print collector according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a second embodiment of a fingerprint and palm print collector according to the present application;
FIG. 3 is a three-dimensional exploded view of an embodiment of a fingerprint and palm print collector of the present application;
FIG. 4 is a schematic exploded perspective view of a fingerprint and palm print collector according to an embodiment of the present application;
FIG. 5 is a fifth exploded perspective view of an embodiment of a fingerprint and palm print collector of the present application;
FIG. 6 is a six-dimensional exploded view of an embodiment of a fingerprint and palm print collector of the present application;
FIG. 7 is a schematic diagram of a seventh embodiment of a fingerprint and palm print collector of the present application;
FIG. 8 is a schematic diagram of an eighth embodiment of a fingerprint and palm print collector of the present application;
FIG. 9 is a schematic diagram of a fingerprint and palm print collector according to an embodiment of the present application;
fig. 10 is a schematic view of a tenth structure of a fingerprint and palm print collector according to an embodiment of the present application.
Detailed Description
The application is further described below with reference to the drawings.
As shown in FIG. 1, a schematic structure of an embodiment of a fingerprint and palm print collector of the present application comprises a rectangular light guide plate 1, a supporting layer 2 for supporting the light guide plate 1 is tightly adhered below the light guide plate 1, the supporting layer 2 is a transparent plate body with a thickness of 0.1 μm-2 mm, and the refractive index n of the supporting layer 2 is as follows 1 Less than the refractive index n of the finger and palm skin surface f This is so arranged as not to disrupt the propagation of light rays within the light guide plate 1 as much as possible. For example, the support layer 2 may be made of Teflon AF2400 of Teflon Long Suliao having a refractive index of 1.29, and typically, a refractive index of 1.33 to 1.46 on the surface of the finger.
The light guide plate 1 and the supporting layer 2 are arranged above the image collector 3, and the lower surface of the supporting layer 2 in this embodiment is tightly attached to the upper surface of the image collector 3, and the light guide plate 1 can be a mobile phone panel glass or a tablet personal computer panel glass.
As shown in the drawing, when a finger or palm does not press the light guide plate 1, light emitted from the light source is incident into the light guide plate 1, at least a portion of the light is transmitted in the light guide plate 1 in a total reflection form, and when the finger or palm presses the upper surface of the light guide plate 1, sweat is present on the surface of the finger or palm due to the difference between the refractive index of the surface of the finger or palm and air, and the refractive index of the sweat is similar to that of water, so that the total reflection condition of the light in the light guide plate 1 is destroyed, and a portion of the light is projected onto the fingerprint or palm print through the surface of the light guide plate 1, and the scattered light of various angles is generated on the surface of the fingerprint or palm print, and the scattered light projects the fingerprint or palm print image to the image collector 3, thereby collecting the fingerprint or palm print image.
The second embodiment of the fingerprint and palm print collector shown in fig. 2 has the same structure as the embodiment shown in fig. 1, except that: the supporting layer 2 comprises a rectangular plate body 4, a plurality of cavities 5 are arranged on the surface of the plate body 4, the supporting layer 2 is meshed through the plurality of cavities 5, and the refractive index n1 of the supporting layer 2 is the material of the supporting layer 2The average of the refractive index of the material itself and the refractive index of the cavity 5 therein, which may also be referred to as the average refractive index, is assumed to be n Support frame The surface area of the light guide plate 1 in contact with the light guide plate is s 1 The method comprises the steps of carrying out a first treatment on the surface of the In the cavity is air or other material with refractive index n Empty space The surface area of the cavity contacting the light guide plate 1 is s 2 Then n 1 (average refractive index) is (n) Support frame *s 1 +n Empty space *s 2 )/(s 1 +s 2 ). The bonding position of the supporting layer 2 and the light guide plate 1 and the propagation position of the light path in the light guide plate 1 are arranged in a staggered manner, so that the supporting layer 2 is arranged to ensure that the propagation of light in the light guide plate 1 is not damaged as far as possible. The usage of this embodiment is the same as that of the embodiment shown in fig. 1, and will not be repeated here.
As shown in fig. 3, the fingerprint and palm print collector of the present application has a three-dimensional exploded schematic view, and most of the structures are the same as those of the embodiment shown in fig. 2, except that: the plurality of cavities 5 are arranged in a dense matrix.
As shown in fig. 4, a four-dimensional exploded schematic view of an embodiment of a fingerprint and palm print collector of the present application has the same structure as the embodiment shown in fig. 2, except that: the plurality of cavities 5 arranged on the surface of the plate body 4 are all strip-shaped grid holes. The plate body 4 is made to be grid-shaped. The usage of this embodiment is the same as that of the embodiment shown in fig. 2, and will not be repeated here.
As shown in fig. 5, a fifth exploded perspective view of the fingerprint and palm print collector of the present application has the same structure as the embodiment shown in fig. 2, except that: the upper surface of the plate body 4 is provided with a plurality of grooves 6 for supporting the refractive index n of the layer 2 1 Is the average of the refractive index of the material of the support layer 2 itself and the refractive index of the grooves 6 therein. The plurality of grooves 6 are arranged in a dense matrix. The method of using the embodiment is the same as that of the embodiment shown in fig. 2, and will not be described here again.
As shown in fig. 6, a six-dimensional exploded schematic view of an embodiment of a fingerprint and palm print collector of the present application has the same structure as the embodiment shown in fig. 2, except that: support layer2 is composed of a plurality of round gaskets 7 arranged at intervals, and the refractive index n of the supporting layer 2 1 Is the average of the refractive index of the material of the support layer 2 itself and the refractive index of the cavity between the plurality of spacers 7. The plurality of spacers 7 are arranged in a matrix. The usage of this embodiment is the same as that of the embodiment shown in fig. 2, and will not be repeated here.
As shown in fig. 7, a seventh embodiment of the fingerprint and palm print collector of the present application has the same structure as the embodiment of fig. 1, except that: the image collector 3 comprises an orifice plate 8 and an image sensor 9, wherein the orifice plate 8 is a plate body with a plurality of dense small holes on the surface. The aperture plate 8 is disposed above the image sensor 9, and the supporting layer 2 is closely attached to the upper surface of the aperture plate 8.
When the light guide plate 1 is not pressed by a finger or palm in use, part of light rays emitted by the light source are transmitted in the light guide plate 1 in a total reflection mode, when the finger or palm is pressed on the upper surface of the light guide plate 1, the total reflection condition of the light rays in the light guide plate 1 is destroyed, a part of light rays are projected onto fingerprints or palmprints through the surface of the light guide plate 1, the surfaces of the fingerprints or palmprints scatter the light, scattered light of all angles is generated, and a part of scattered light forms a fingerprint image or palmprint image after passing through small holes on the pore plate 8 and is collected by the image sensor 9 below the pore plate 8.
As shown in fig. 8, the fingerprint and palm print collector of the present application has a eight-structure schematic diagram, and most of the structures are the same as those of the embodiment shown in fig. 7, except that: the supporting layer 2 adopts the supporting layer structure in the embodiment shown in fig. 2, and the use method of the fingerprint and palm print collector is the same as the use method of the embodiment shown in fig. 7, and will not be described again here.
As shown in fig. 9, a ninth embodiment of the fingerprint and palm print collector of the present application has a structure mostly identical to that of the embodiment shown in fig. 7, except that: the plate body with the dense micro-pore channels 10 on the surface is adopted as the pore plate 8, and the use method of the fingerprint collector is the same as that of the embodiment shown in fig. 7, and will not be repeated here.
As shown in fig. 10, the fingerprint and palm print collector of the present application has a tenth structure, and most of the structures are the same as those of the embodiment shown in fig. 7, except that: the supporting layer 2 of this embodiment adopts the supporting layer structure of the embodiment shown in fig. 5, and the image sensor (light receiver and light emitter or only light receiver) of the image collector 3 is disposed in the groove 6 (not shown in the figure) of the supporting layer 2, where the light emitter and the light receiver are disposed at intervals, and the supporting layer 2 is directly attached to the upper surface of the display screen 11. The method of using the fingerprint collector is the same as that of the embodiment shown in fig. 7, and will not be described here again.
The image sensor of the image collector in fig. 1-9 may also be directly disposed in the display screen, which is all the scope of the present application.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (7)
1. The utility model provides a fingerprint, palm print collector, its characterized in that includes light guide plate and display screen, closely laminate below the light guide plate has the supporting layer that is used for supporting the light guide plate, the supporting layer includes the plate body, the upper surface of plate body is provided with a plurality of recesses or plate body surface and is provided with a plurality of cavitys, the refracting index n of supporting layer 1 The refractive index n of the support layer is the average value of the refractive index of the support layer material and the refractive index of the cavity or groove therein 1 Less than the refractive index n of the finger and palm skin surface f The saidThe supporting layer is arranged on the image collector, the image collector comprises an image sensor, when a plurality of grooves are formed in the upper surface of the plate body, the image sensor is arranged in the grooves of the supporting layer, when a plurality of cavities are formed in the surface of the plate body, the image collector is arranged on or in a display screen, and the attaching positions of the supporting layer and the light guide plate and the spreading positions of light paths in the light guide plate are staggered.
2. The fingerprint and palm print collector of claim 1, wherein a plurality of the cavities or the plurality of grooves are arranged in a dense matrix.
3. The fingerprint and palm print collector of claim 2, wherein the plurality of cavities are elongated grid holes.
4. The fingerprint and palm print collector according to claim 1, wherein the support layer is composed of a plurality of spacers arranged at intervals, and the refractive index n of the support layer is 1 Is the average of the refractive index of the support layer material itself and the refractive index of the cavity between the plurality of spacers.
5. The fingerprint and palm print collector according to claim 4, wherein a plurality of the pads are arranged in a matrix.
6. The fingerprint and palm print collector of claim 1, wherein the support layer has a thickness of 0.1 microns to 2 millimeters.
7. The fingerprint and palm print collector of claim 1, wherein the image collector comprises an aperture plate disposed above the image sensor, and the support layer is disposed above the aperture plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333582.XA CN106326803B (en) | 2015-06-16 | 2015-06-16 | Fingerprint and palm print collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333582.XA CN106326803B (en) | 2015-06-16 | 2015-06-16 | Fingerprint and palm print collector |
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| Publication Number | Publication Date |
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| CN106326803A CN106326803A (en) | 2017-01-11 |
| CN106326803B true CN106326803B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510333582.XA Active CN106326803B (en) | 2015-06-16 | 2015-06-16 | Fingerprint and palm print collector |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138977B (en) * | 2019-05-25 | 2021-04-13 | Oppo广东移动通信有限公司 | Content display method and device, electronic equipment and storage medium |
| CN110767095B (en) * | 2019-11-13 | 2022-02-08 | 京东方科技集团股份有限公司 | Flexible display module, preparation method thereof and flexible display device |
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| EP0045916A1 (en) * | 1980-08-11 | 1982-02-17 | Siemens Aktiengesellschaft | Fingerprint sensor delivering an output signal corresponding to the fingerprint |
| US6011860A (en) * | 1997-02-12 | 2000-01-04 | Nec Corporation | Small reliable image input apparatus incorporated in finger-print collation system of personal identification |
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