CN108960007A - optical fingerprint identification module - Google Patents
optical fingerprint identification module Download PDFInfo
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- CN108960007A CN108960007A CN201710357765.4A CN201710357765A CN108960007A CN 108960007 A CN108960007 A CN 108960007A CN 201710357765 A CN201710357765 A CN 201710357765A CN 108960007 A CN108960007 A CN 108960007A
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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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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Abstract
The present invention is a kind of optical fingerprint identification module, includes: a shell, an image capturing component, guide-lighting a diffusion layer, a light gathering reflector layer, a pressing plate, at least a light source and a light channel structure.The light channel structure is formed in the lower section of the pressing plate and the top of the image capturing component, and passes through the light gathering reflector layer and the partial leaded light diffusion layer and surround by the light gathering reflector layer and the partial leaded light diffusion layer.Wherein, light emitted by an at least light source can form conduction and diffusion in the leaded light diffusion layer, and optically focused and reflection can be formed in the light gathering reflector layer, and light emitted by an at least light source can be round-trip between the leaded light diffusion layer and the light gathering reflector layer, and then it is exposed in the pressing plate via the light channel structure, then reflex on the image capturing component and be acquired.The present invention can allow the utilization rate of light more effectively to be increased.
Description
Technical field
The present invention relates to fingerprint identification technology fields, and in particular to a kind of mould that fingerprint recognition is carried out using optical profile type
Block.The design of multi-level diffusion and optically focused is utilized in the module, enable light generate refraction repeatedly, reflection, scattering with
The situations such as conduction, allow the utilization rate of light more effectively to be increased.
Background technique
Science and technology is ensures information security at present, and what biological identification technology already became various industries now gives priority to item
Mesh.Wherein, fingerprint (fingerprint) identification is a kind of most commonly seen and widely applied biological identification technology.
Fingerprint is a kind of pattern as composed by many curved bars.And from the point of view of amplifying, these lines are as wave crest is grand
It rises and is recessed with trough and shows height and rise and fall.Therefore, fingerprint characteristic is the potassium ion distribution of these lines, and almost everyone
There is different fingerprint characteristics, its uniqueness is made to can be used as the basis of characterization of identity.
Fingerprint identification technology used at present is roughly divided into condenser type and two kinds of optical profile type.Wherein, condenser type is mainly
The situations such as the charge variation on finger, temperature difference, pressure are scanned by capacitive sensing device can obtain its dactylotype.And light
Formula is then directly to absorb the image of its fingerprint, that is, refer to using light source opponent and be irradiated to highlight between each lines
The comparison of light and shade of Wave crest and wave trough, and photographed with image capturing component to provide subsequent analysis.Although condenser type has more
The features such as frivolous, short and small, but its cost is come high compared with optical profile type.
The storage space as needed for the image or data of each fingerprint is little so that electronic apparatus typically now or
Fingerprint identification module is also more applied thereon by laptop.Either condenser type or optical profile type, purpose are all to take
The structure or image of fingerprint are obtained, and further calculate using algorithm and is compared with stored file,
To identify the identity of user.
In addition, the fingerprint identification module of optical profile type mainly includes slidingtype and pressing to the acquisition mode of fingermark image
Formula.Wherein, slidingtype mainly by by finger in slipping in module and photograph simultaneously, then by program by the image taken the photograph into
Row is pieced together to be combined into complete fingermark image.And push type be then directly by finger pressing in module up to certain time it
Afterwards, the acquirement of fingermark image can be completed.
In general, although slidingtype identification module is smaller and cost is not high, and it is conducive to be arranged on electronic apparatus,
But user must be slided with specific direction and speed, otherwise be easy to cause identification mistake.Opposite, push type identifies mould
Although block provides user's conveniently operation interface, but also because its can once take the photograph complete fingermark image and need
There is biggish sensing area, therefore occupies the more space of electronic apparatus and production cost with higher relatively.
It referring to Figure 1, is the diagrammatic cross-section of the fingerprint identification module 1 of an optics push type of the prior art.Such as Fig. 1 institute
Show, which includes an image capturing component 11, two light sources, 121,122, one light diffusing sheet 13 and a pressing plate
10.The pressing plate 10 provides finger A and is pressed in surface thereof 100, and two light source 121,122 provides the photograph of light
It penetrates.It is understood that in order to enable light effectively to penetrate and to finger type at irradiation, the pressing plate 10 and the light diffusing sheet 13
With translucency.
Secondly, the light diffusing sheet 13, which can guide or reflect its light, forms the irradiation of area source to the pressing plate 10, and have
Have an aperture 130 with to be irradiated to the light that reflection is generated on finger A (the in particular to wave crest portions of line) formation penetrate, in turn
It is received by the image capturing component 11 and is photographed.
By the Fig. 1 and preceding description it is found that provide disposable pressing, which need to have biggish sensing area.
However, light may be to be projected from light source 121,122 with various angles, so not all light can cover
To finger A, some possible light can directly transmit by finger A the pressing plate 10 and be shed.In this way, making light source
Illumination efficiency reduces, or even affects the acquisition quality of image.
As optical profile type fingerprint identification module generally become electronic apparatus used in fingerprint identification technology,
Because its can provide user due to intuition it is simple in a manner of operated.If but its technology exists in addition to the setting of high cost or sky
Between occupy it is larger except other missings when, such as most important image capturing effect, will make its in the market it is expansionary compared with
Hardly possible has competitive advantage.Be therefore, how to solve the problems, such as this once the main purpose that develops for the disclosure.
Summary of the invention
It is an object of the invention to propose a kind of module of optical fingerprint identification.The module is illuminated using side-light type, and
The design of multi-level diffusion and optically focused is utilized, the feelings such as refraction, reflection, scattering and conduction that light is generated repeatedly
Shape allows the utilization rate of light more effectively to be increased.In this way, light can be collected on specific optical channel, and can be promoted
The acquisition quality of fingermark image.
The present invention is a kind of optical fingerprint identification module, includes: a shell, an image capturing component, a guide-lighting expansion
Dissipate layer, a light gathering reflector layer, a pressing plate, at least a light source and a light channel structure.The image capturing component is set to the shell
In body.The leaded light diffusion layer is set to the top of the image capturing component.The light gathering reflector layer is set to the leaded light diffusion layer
Top.The pressing plate is set to the top on the shell with the light gathering reflector layer, to provide pressing.At least light source difference
It is set on an at least side for the leaded light diffusion layer and the light gathering reflector layer.The light channel structure is formed under the pressing plate
Side and the top of the image capturing component, the light channel structure and pass through the light gathering reflector layer and the partial leaded light diffusion layer and
It is surround by the light gathering reflector layer and the partial leaded light diffusion layer.Wherein, light emitted by an at least light source can be in this
Conduction and diffusion are formed in guide-lighting diffusion layer, and optically focused and reflection can be formed in the light gathering reflector layer, and an at least light source
Emitted light can be round-trip between the leaded light diffusion layer and the light gathering reflector layer, and then exposes to via the light channel structure
In the pressing plate, then reflexes on the image capturing component and be acquired.
More preferably understand to have to above-mentioned and other aspect of the invention, special embodiment below, and cooperates specification
Attached drawing is described in detail below.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of the fingerprint identification module 1 of an optics push type of the prior art.
Fig. 2 is the diagrammatic cross-section of an optical fingerprint identification module 2 proposed by the invention.
Fig. 3 A is possible path schematic diagram of the light on a diffusion sheet 252.
Fig. 3 B is possible path schematic diagram of the light on a concentration piece 281.
Fig. 4 is the diagrammatic cross-section of an optical fingerprint identification module 2 ' proposed by the invention.
Description of symbols:
1: fingerprint identification module 10: pressing plate
100: surface 11: image capturing component
121,122: light source 13: light diffusing sheet
130: aperture A: finger
2,2 ': optical fingerprint identification module 20: shell
21: pressing plate 22: image capturing component
23: line construction 241,242: light source
25: guide-lighting diffusion layer 251: light guide plate
251a: micro-structure 252: diffusion sheet
252a: diffusion particle 26: bottom reflection piece
27,27 ': light channel structure 28: light gathering reflector layer
281: concentration piece 281a, 281a ': prism
282: top reflective piece B: finger
S1, S2: side L1~L4: light
Specific embodiment
It is to propose that embodiment is described in detail below, embodiment can't limit this hair only to illustrate as example
The bright range to be protected.In addition, the attached drawing in embodiment be omit it is unnecessary or with the element that usual technology can be completed, with clear
Chu shows technical characterstic of the invention.
Implementation explanation of the invention is now carried out with a first embodiment.Fig. 2 is referred to, first embodiment is proposed thus
The diagrammatic cross-section of one optical fingerprint identification module 2.As shown in Fig. 2, the optical fingerprint identification module 2 includes a shell
20, an image capturing component 22, one guide-lighting diffusion layer 25, a light gathering reflector layer 28, a pressing plate 21, two light sources 241,242, one
Light channel structure 27 and a bottom reflection piece 26.In this first embodiment, which is to be applied to
Setting on one electronic apparatus (being not depicted in attached drawing), but it is not limited to this.Therefore, for existing manufacture means,
The shell 20 is a part of the casing of the electronic apparatus；Alternatively, the shell 20 can be fixed in other ways and be answered
In electronic apparatus.
These elements are presented in Fig. 2 in the position corresponding relationship in setting.As shown in Figure 2 it is found that most member
Part or component are all set among the shell 20, and only the pressing plate 21 is in order to which the pressing for providing a finger B is to be set to the shell
On body 20；Such as it is arranged in the aperture that the shell 20 is engraved out with mosaic mode.The image capturing component 22 is in the shell 20
In setting comparatively be positioned at integral module bottom position.Secondly, the leaded light diffusion layer 25 is to be set to the image
The top of securing component 22, which is the top for being set to the leaded light diffusion layer 25, and the pressing plate 21 is then
The top of the light gathering reflector layer 28 is set to positioned at outermost layer.
From the above, which is formed at the upper of the lower section of the pressing plate 21 and the image capturing component 22
Side, that is, corresponded to each other with the about 22 image capturing component, and the light channel structure 27 and across the light gathering reflector layer 28
With the leaded light diffusion layer 25 of part and surround by the leaded light diffusion layer 25 of the light gathering reflector layer 28 and part.Come in detail
It says, the formation of the light channel structure 27, which can be, engraves out a spy for the leaded light diffusion layer 25 of the light gathering reflector layer 28 and part
Behind one duct of set aperture, it is embedded in specified material and forms.
And the pore size, it is preferable that other than must be corresponding to the image capturing component 22, should also consider general hand
Refer to the possibility size of B, or is, for example, the application of the different images acquisition mode for slidingtype and push type.
In this first embodiment, which be made of a light-transmitting materials, such as liquid optical cement
(Liquid Optical Clear Adhesive, LOCA)；Namely general ultraviolet light (UV) solidification glue.It is in addition to that can tie
Specific pattern can also be formed out by closing and fixing outside the element of surrounding, and the property with light-permeable.Specifically, in Fig. 2
The formation of the light channel structure 27 also further extend between the pressing plate 21 and the light gathering reflector layer 28, to reinforce and phase
The combination of element is closed, but it is not limited to this；Such as other embodiments can also be directly by pressing plate and light gathering reflector layer phase mutual connection
Touching, without inserting liquid optical cement.
From the above, the leaded light diffusion layer 25 in Fig. 2 is made of a light guide plate 251 and a diffusion sheet 252, the expansion
Discrete piece 252 is set on the light guide plate 251.Secondly, the light gathering reflector layer 28 is by a concentration piece 281 and a top reflective piece
282 are formed, which is the extension for being set on the concentration piece 281, and combining the light channel structure 27
Point；And the concentration piece 281 is then to be set on the leaded light diffusion layer 25, especially on the diffusion sheet 252 wherein.In addition,
The bottom reflection piece 26 in Fig. 2 is the lower section for being set to the leaded light diffusion layer 25, especially in the light guide plate 251 wherein
Under, and around the image capturing component 22.
On the other hand, two light sources 241,242 used in this first embodiment are to be respectively arranged at the leaded light diffusion layer 25
On the side S1 and side S2 of the light gathering reflector layer 28.Specifically, the component shape of lamp bar can be used in the light source 241,242
Formula, that is, each lamp bar have multiple light emitting diodes.By by two light sources 241,242 of linear light source form respectively in side
Close attaching is done on S1 and side S2, and the light emitted by it can be made to be incident upon in the leaded light diffusion layer 25 and conducted, into
And generate the backlight form of area source.In other words, the optical fingerprint identification module 2 of the invention is a kind of finger of side-light type
Line identification module, in the volume or thickness of integral module be comparatively to have belonged to the design of ultrathin.
Although the top reflective piece 282 in Fig. 2 is to be coated with up and down in side S1, S2 with the bottom reflection piece 26
The mode of two light sources 241,242 does setting signal, but the present invention is also not limited to this.For example, other modes may be designed as
It is laterally to rest against top reflective piece and bottom reflection piece on respective side respectively by two light sources, that is, by the top on upper layer
Portion's reflector plate is designed to and concentration piece 281, the same width of diffusion sheet 252 in Fig. 2.It is understood that the setting of this part can
Depending on used striation pattern, and its setting to be intended to prevent from having the gap in element junction or notch, in order to avoid
Light is caused to be pierced by.
Furthermore the fingerprint identification module 2 also includes a line construction 23, which is electrically connected to the image and obtains
Component 22 and the light source 241,242 are taken, to provide necessary power supply and carry out electric signal transmission.In this first embodiment
In, which is done using flexible printed circuit board (Flexible Printed Circuit Board, abbreviation FPCB)
Setting, with reach in the shell 20 bottom on side wall wiring be electrically connected.Although the line construction 23 in Fig. 2
Be done in a manner of being coated completely by the shell 20 setting signal, but it is understood that, the shell 20 also must exist correlation
Route hole be pierced by for the line construction 23, in electronic apparatus All other routes or element be electrically connected.
In this first embodiment, which can be for by including a processor, a memory, a photographic mirror
Head is formed with elements such as a coffrets, and but it is not limited to this.For example, processor can be also not provided in other modes
With memory in wherein, and only simple phtographic lens；The image taken the photograph can namely be transferred in electronic apparatus
Processing unit handled.
From the above, it is known that the design of the fingerprint identification module 2 of the invention will be intended to 241,242 institute of light source
On the ray guidance of injection to the light channel structure 27.Light emitted by the light source 241,242 is further illustrated in Fig. 2 to exist
Various possible directions and path (being illustrated with arrow) inside the shell 20, and the form in these paths includes reflecting, thoroughly
It penetrates, reflect.Therefore light emitted by the light source 241,242 can be in the leaded light diffusion layer 25 in this first embodiment
Middle formation conduction and diffusion, and optically focused and reflection can be formed in the light gathering reflector layer 28, and emitted by the light source 241,242
Light can be round-trip between the leaded light diffusion layer 25 and the light gathering reflector layer 28, and then exposed to via the light channel structure 27
In the pressing plate 21, then reflexes on the image capturing component 22 and be acquired.
Specifically, the light guide plate 251 can by its multiple micro-structure 251a come to emitted light into
Row conduction, enable be originally used for the light of linear light source form on the light-emitting surface of the light guide plate 251 (i.e. the light guide plate 251 with should
The boundary of diffusion sheet 252, the light channel structure 27) form area source.The micro-structure 251a in Fig. 2 is with rectangular saw-tooth
Shape pattern, which is done, to be illustrated, however, the present invention is not limited thereto；It such as also can be hemisphere jut shape or triangle tapered.In addition, in Fig. 2
The micro-structure 251a is to do to illustrate with equidistant pattern, however, the present invention is not limited thereto；Such as spacing can be for from two sides to center
Direction is gradually shortened.
On the other hand, as shown in Fig. 2, the diffusion sheet 252 can be by its multiple diffusion particle 252a come to institute
The light of injection is diffused.For current technology, which is a kind of optics expansion that can provide uniform area light source
It dissipates film (Diffuser).The sphere for providing high light transmittance is usually dispersedly coated with or imprinted in substrate (such as PET)
Grain (size can for difference) is using as diffusion particle, so that when light will be worn when passing through in the medium of two different refractivities
It crosses and refraction, scattering occurs, to produce the effect of optics diffusion.
Furthermore as shown in Fig. 2, the concentration piece 281 then can be by its multiple prism 281a come to emitted
Light carry out optically focused.For current technology, the concentration piece 281 be it is a kind of can provide luminous intensity concentrate with promoted brightness or
The prism film (Prism Film) (or can be described as brightness enhancement film or bright enhancement film) of luminance.Usually go out light in substrate (such as PET)
The triangle body structure (size can for difference) of entire row is fifty-fifty imprinted out on face using as prism, so that when light is when passing through
It will reflect, reflex to certain party and always adjust light distribution, that is, light can be concentrated and be recycled to reduce
Loss, to produce the effect of brightness or luminance promotion.
Refer to Fig. 3 A and Fig. 3 B；Wherein, Fig. 3 A is possible path schematic diagram of the light on the diffusion sheet 252；And scheme
3B is possible path schematic diagram of the light on the concentration piece 281.
Firstly, as shown in Figure 3A, the size for designing each diffusion particle 252a is identical each other, and the multiple light illustrated
It is all to be incident to the diffusion sheet 252 in a vertical manner, and refraction is generated after entering diffusion particle 252a therein.But because
It is to reflect on different location for each light, so also different from the exit positions on particle, direction, causes whole incident light
The illumination amplitude of line increases.Moreover being incident to the light in the diffusion sheet 252 may be there are many angle, it is possible to which light is worked as in understanding
When being scattered in area source by uniform conductive on the light guide plate 251, which can further form it into more preferably line
Diffusion effect.
Secondly, as shown in Figure 3B, designing the size of each prism (such as prism 281a and prism 281a ') each other
It is identical, and the multiple light L1~L4 illustrated be the concentration piece 281 is incident to different angle, and in enter it is wherein different
The reflection or refraction of different angle are generated after prism.For example, wherein a light L1 enters upward from opposite lower left
After penetrating, reflect and towards former incident place's traveling；Another light L2 then from opposite lower right it is incident upward after, reflect and towards original
It advances at incidence；And another light L3 is advanced after reflecting corresponding prism 281a, then toward top；And another light
L4 is then next incident after reflecting corresponding prism 281a, then toward adjacent another prism 281a ', and then re-forms folding
It penetrates and advances towards opposite lower right.
From the above, according to fig. 2 with Fig. 3 B it is found that the bottom reflection piece 26 can be (special to the leaded light diffusion layer 25 is pierced by
The light guide plate 251 therein) light reflected, therefore described light L1, L2, L4 are in the reflection via not specific times
It is just returned in the leaded light diffusion layer 25 again later with refraction, and is spread and passed again by the diffusion sheet 252 and the light guide plate 251
It leads.In addition, the top reflective piece 282 can be to the light for being pierced by the concentration piece 281 (part of prism 281a especially therein)
Line L3 is reflected, therefore light L3 just returns to the light gathering reflector layer again after the reflection and refraction via not specific times
28 with the leaded light diffusion layer 25 in so that the light ray energy on either upper layer or lower layer is all not easy to escape.
In this way, light emitted by two light sources 241,242 do not reach also may exit off the shell 20 position (namely
The light channel structure 27) when, it can still be retained in the shell 20.In other words, by it is relevant reflection, refraction diffusion with
Optically focused phenomenon, emitted light can be more forced to inside the shell 20 towards before the position of the light channel structure 27
Into.
In this first embodiment, which be made of the light-transmitting materials of liquid optical cement, and the liquid
The refractive index of state optical cement is between 1.50~1.54.In this way, light is by the light guide plate 251, the diffusion sheet 252 or the optically focused
Piece 281 can generate corresponding refraction when entering the light channel structure 27 again, and then can form advantageous angle from the optical channel knot
The position of structure 27 is irradiated the pressing plate 21；The finger B above it is namely irradiated, and by the image capturing component 22
It is photographed and obtains fingermark image.
It can be on demand and different in the form of two light sources 241,242 set by above-mentioned first embodiment；For example, can
Use project light for the light emitting diode (LED) of visible light, or can be used project light for infrared ray (IR) type not
The light emitting diode of visible light.Therefore, the image capturing component 22 arranged in pairs or groups just must according to the form of used light source, and
It completes to be arranged in a manner of the sensing of corresponding visible light or black light.
On the other hand, for current technology, the used top reflective piece 282 and the bottom reflection piece 26 are one
Kind can provide the reflectance coating (Reflection Film) that light does high reflection.The usually side to be coated on substrate surface
Formula is completed, and material that it is coated with can be for example silver or aluminium.
The present invention can also make further variation design according to above-mentioned first embodiment.For example, can be used only should
Light guide plate 251 has multiple micro-structure 251a to form reflection to the light passed through；Namely it is not provided with the bottom reflection
Piece 26.In this way, although the reflection benefit of light may reduce, because reflexive height can be used in the used shell 20 in itself
Material made by, therefore also not will cause light excessively escape and influence illumination efficiency.
It is arranged alternatively, the present invention can also be done only with unilateral light source；Light source 241 or light in Fig. 2 are namely only set
242 one of them of source.It is noted that form preferable light conduction and illuminating effect, the optical channel knot in Fig. 2
Structure 27 is the centre for being located opposite from two light sources 241,242, can so reflect the optimum position of light accumulation.Therefore if only
When unilateral light source is set, the light channel structure may must be formed in from the light source have with a certain distance from position, that is,
Close to the other end of shell, to be the light for doing cumulative maximum emitted by benefit.
Implementation explanation of the invention is now carried out with a second embodiment.Fig. 4 is referred to, second embodiment is proposed thus
The diagrammatic cross-section of one optical fingerprint identification module 2 '.As shown in figure 4, the difference of this second embodiment and the first embodiment
It is, the light channel structure 27 ' in the second embodiment is directly to be rendered as a duct；Namely by the light gathering reflector layer
After 28 are engraved with the leaded light diffusion layer 25 of part, it is not just embedded in any material.
From the above, as soon as structure periphery does not extend to this in the case where the light channel structure 27 ' is only the design in duct
Between pressing plate 21 and the top reflective piece 282, that is, the top reflective piece 282 is directly to contact knot with the pressing plate 21
It closes.In other embodiments, related glue material (light-transmitting materials can be not necessarily) can also be used combine top reflective piece with by
Pressing plate, but this glue material must be made to form an aperture on the position of the corresponding light channel structure.
In this second embodiment, although there is no the material with larger refractive index is (as empty for the light channel structure 27 '
The medium of gas) so that the refraction situation of light is different compared to for first embodiment.Which kind of but no matter had using
There are the material of translucency, such as glass or glue material, must still have its light decay rate, that is, can still cause to the light passed through
Possible energy loss.Therefore light channel structure 27 ' for being directly rendered as duct in Fig. 4 can allow light with best instead
Performance the pressing plate 21 is irradiated, the fingermark image taken the photograph also can because have adequately illumination due to have good quality.
The present invention can also make further variation according to above-mentioned first embodiment and second embodiment and design.It is specific next
It says, the present invention can carry out the change of the depth in engraved duct on disclosed light channel structure；For example, optical channel can be designed
Structure does not pass through the guide-lighting diffusion layer just through the light gathering reflector layer.In this way, the guide-lighting diffusion of this design
Layer, diffusion sheet especially therein, which will show, to be set to by entire surface on its light guide plate, and the light channel structure of this design is just
It is formed in the top of entire guide-lighting diffusion layer, and is only surround by the light gathering reflector layer.
From the above, the guide-lighting diffusion layer of this variation design can be using possessed multiple diffusion particles come to being penetrated
Light out is diffused especially from the light of the light guide plate below diffusion sheet；It later, just can be straight by the light spread
It connects and is incident upon in the light channel structure.Although have on being formed by light conduction mode with two kinds of embodiments above-mentioned it is a little not
Together, but equally required illuminating effect and good fingermark image photographic quality can also be generated.
In conclusion fingerprint identification module proposed by the invention is especially a kind of to carry out fingerprint recognition using optical profile type
Module can do effective application to the electronic apparatus under current technology really, and either be directed to slidingtype or push type
Image acquisition mode can all be applied.And the attainable technical effect enhancement of present invention institute includes: first, due to using
Side-light type illumination, therefore can effectively reduce the thickness of integral module；Second, the design of multi-level diffusion and optically focused is utilized, make
The situations such as refraction, reflection, scattering and conduction repeatedly can be generated by obtaining light, and the utilization rate of light is allowed more effectively to be increased；
Third, light be because that can be collected on specific optical channel, therefore the acquisition quality of fingermark image can be promoted.
It is event, the present invention can effectively solve relevant issues proposed in the prior art, and can have successfully been achieved the disclosure
The main purpose of development.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention.The neck of technology belonging to the present invention
Technical staff in domain, without departing from the spirit and scope of the invention, when various variation and retouching can be made.Therefore, of the invention
Protection scope when view as defined in claim subject to.
Claims (10)
1. a kind of optical fingerprint identification module, includes:
One shell；
One image capturing component, is set in the shell；
One guide-lighting diffusion layer, is set to the top of the image capturing component；
One light gathering reflector layer, is set to the top of the leaded light diffusion layer；
One pressing plate is set to the top on the shell with the light gathering reflector layer, to provide pressing；
An at least light source is respectively arranged on an at least side for the leaded light diffusion layer and the light gathering reflector layer；And
One light channel structure, is formed in the lower section of the pressing plate and the top of the image capturing component, which simultaneously wears
It crosses the light gathering reflector layer and the partial leaded light diffusion layer and is surround by the light gathering reflector layer and the partial leaded light diffusion layer；
Wherein, light emitted by an at least light source can form conduction and diffusion in the leaded light diffusion layer, and can be poly- in this
Optically focused and reflection are formed in reflection layer, and light emitted by an at least light source can be anti-in the leaded light diffusion layer and the optically focused
Penetrate between layer round-trip, and then exposed in the pressing plate via the light channel structure, then reflex on the image capturing component and
It is acquired.
2. optical fingerprint identification module as described in claim 1 also includes a line construction, line construction electrical connection
In the image capturing component and an at least light source, to provide power supply and carry out electric signal transmission.
3. optical fingerprint identification module as described in claim 1 also includes a bottom reflection piece, it is set to leaded light expansion
It dissipates the lower section of layer and surround the image capturing component, to reflect the light for being pierced by the leaded light diffusion layer.
4. optical fingerprint identification module as described in claim 1, wherein the leaded light diffusion layer includes:
One light guide plate, which simultaneously has multiple micro-structures, to conduct to light emitted by this at least a light source；
And
One diffusion sheet is set on the light guide plate, which simultaneously has multiple diffusion particles, to an at least light source institute
The light of injection is diffused.
5. optical fingerprint identification module as described in claim 1, wherein the light gathering reflector layer includes:
One concentration piece is set on the leaded light diffusion layer, which simultaneously has multiple prisms, to an at least light source
Emitted light carries out optically focused；And
One top reflective piece, is set on the concentration piece, to reflect the light for being pierced by the concentration piece.
6. optical fingerprint identification module as described in claim 1, wherein the light channel structure is by a light-transmitting materials institute structure
At, and the light channel structure is extended between the pressing plate and the light gathering reflector layer.
7. optical fingerprint identification module as claimed in claim 6, wherein the light-transmitting materials are a liquid optical cement, and the liquid
The refractive index of state optical cement is between 1.50~1.54.
8. optical fingerprint identification module as described in claim 1, wherein the light channel structure is rendered as a duct.
9. optical fingerprint identification module as described in claim 1, wherein light emitted by an at least light source is visible
Light or black light, and the image capturing component is to complete to be arranged in a manner of the sensing of corresponding visible light or black light.
10. a kind of optical fingerprint identification module, includes:
One shell；
One image capturing component, is set in the shell；
One guide-lighting diffusion layer, is set to the top of the image capturing component；
One light gathering reflector layer, is set to the top of the leaded light diffusion layer；
One pressing plate is set to the top on the shell with the light gathering reflector layer, to provide pressing；
An at least light source is respectively arranged on an at least side for the leaded light diffusion layer and the light gathering reflector layer；And
One light channel structure is formed in the lower section of the pressing plate and the top of the image capturing component, the leaded light diffusion layer, the light
Channel design simultaneously passes through the light gathering reflector layer and is surround by the light gathering reflector layer；
Wherein, light emitted by an at least light source can form conduction and diffusion in the leaded light diffusion layer, and can be poly- in this
Optically focused and reflection are formed in reflection layer, and light emitted by an at least light source can be anti-in the leaded light diffusion layer and the optically focused
Penetrate between layer round-trip, and then exposed in the pressing plate via the light channel structure, then reflex on the image capturing component and
It is acquired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710357765.4A CN108960007B (en) | 2017-05-19 | 2017-05-19 | Optical fingerprint identification module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710357765.4A CN108960007B (en) | 2017-05-19 | 2017-05-19 | Optical fingerprint identification module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108960007A true CN108960007A (en) | 2018-12-07 |
| CN108960007B CN108960007B (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710357765.4A Expired - Fee Related CN108960007B (en) | 2017-05-19 | 2017-05-19 | Optical fingerprint identification module |
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| CN (1) | CN108960007B (en) |
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| CN110471218A (en) * | 2019-07-26 | 2019-11-19 | 深圳市宝明科技股份有限公司 | A kind of infrared ray can penetrate and the backlight module with brightening effect |
| CN111666926A (en) * | 2020-07-06 | 2020-09-15 | 武汉华星光电技术有限公司 | Display panel |
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| CN110471218A (en) * | 2019-07-26 | 2019-11-19 | 深圳市宝明科技股份有限公司 | A kind of infrared ray can penetrate and the backlight module with brightening effect |
| CN111666926A (en) * | 2020-07-06 | 2020-09-15 | 武汉华星光电技术有限公司 | Display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108960007B (en) | 2022-01-04 |
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