CN209312028U - Optical lens, fingerprint recognition mould group and mobile terminal - Google Patents
Optical lens, fingerprint recognition mould group and mobile terminal Download PDFInfo
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- CN209312028U CN209312028U CN201822019566.5U CN201822019566U CN209312028U CN 209312028 U CN209312028 U CN 209312028U CN 201822019566 U CN201822019566 U CN 201822019566U CN 209312028 U CN209312028 U CN 209312028U
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- optical lens
- lens
- loophole
- light
- fingerprint recognition
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Abstract
The utility model provides a kind of optical lens, fingerprint recognition mould group and mobile terminal.The optical lens of the utility model is arranged in the fingerprint recognition mould group of screen side, and optical lens is located in the optical path of the fingerprint image of reflector reflection, and optical lens includes shading piece, is used for the loophole of imaging on shading piece at least one.The optical lens of the utility model can be applied to common liquid crystals and show screen, so that common liquid crystals show that screen being capable of fingerprint technique under Application Optics screen.
Description
Technical field
The utility model relates to fingerprint identification technology field more particularly to a kind of optical lens, fingerprint recognition mould group and shifting
Dynamic terminal.
Background technique
Fingerprint recognition unlock has become the function that the mobile terminals such as most of mobile phone, tablet computer are all equipped with, currently, referring to
Line identification technology mainly includes condenser type, optical profile type and ultrasonic type.Capacitive fingerprint sensing device is at present using relatively broad
One kind, the finger lines information of user is acquired by being placed in the capacitance sensor of below the panel.And with mobile phone
The arrival in screen epoch comprehensively, capacitance sensor are placed in below screen because being difficult to and are gradually abandoned, and ultrasonic type technology still exists
Initial stage of development, technical costs can not decline, therefore, the most general with fingerprint under optical profile type screen in the application of fingerprint under screen
And.
Due to Organic Light Emitting Diode (organic light-emitting diode, OLED) screen can self-luminous, screen
Curtain thickness is thin, and full screen structure is translucent material, and fingerprint identification device is to be applied to OLED under existing optical panel
On screen.Specifically, the light that OLED screen curtain issues is irradiated to the use covered on screen unlocked by fingerprint region by pixel pitch
The light being reflected back from fingerprint is formed fingerprint image using optical element, fingerprint image is conducted to screen by the fingerprint of person
The optical sensor of lower section is acquired and is identified to fingerprint image by optical sensor.
However, being influenced by OLED screen curtain cost and production capacity, cause fingerprint under matching optical panel also can not big face
Long-pending popularization and application, therefore, research and development are suitable for regular liquid crystal display (Liquid Crystal Display, LCD) screen
Optical finger print technology is extremely urgent.
Utility model content
The utility model provides a kind of optical lens, fingerprint recognition mould group and mobile terminal, shields lower optical finger print to realize
In the application of LCD screen.
In a first aspect, the utility model provides a kind of optical lens, optical lens is arranged in the fingerprint of screen side
It identifies in mould group, and optical lens is located in the optical path of the fingerprint image of reflector reflection, optical lens includes shading piece, shading
Loophole on part at least one for imaging.
Optionally, optical lens further include at least one be used for optically focused lens, lens be arranged on shading piece and with it is saturating
Unthreaded hole is arranged in a one-to-one correspondence, and the optical axis of lens passes through corresponding loophole.
Optionally, lens are convex lens.
Optionally, lens are located at the incident side of loophole or the light emission side of loophole.
Optionally, the incident side of lens is spherical surface, and light emission side is plane；Alternatively,
The incident side of lens is plane, and light emission side is spherical surface.
Optionally, shading piece includes the substrate layer of light-permeable and the light shield layer for shading, and light shield layer is covered in substrate layer
A side surface；Loophole is set on light shield layer.
Optionally, an at least side surface for substrate layer is provided with filter layer, and filter layer is used to filter the light of preset wavelength.
Optionally, the thickness of substrate layer is between 100-500 microns.
Optionally, the diameter of loophole is between 100-500 microns.
Optionally, the thickness of lens is between 10-30 microns.
Optionally, the quantity of loophole is at least two；
Wherein, at least two loopholes are stacked in light incident direction；And/or at least two loophole in light
It is arranged side by side in line incident direction.
Second aspect, the utility model provide a kind of fingerprint recognition mould group, and fingerprint recognition mould group is located at screen side, fingerprint
Identification mould group includes fingerprint recognition chip, reflector and optical lens as described above, and reflector is for reflecting screen surface
Fingerprint image reflex to optical lens, and be radiated in the sensitive surface of fingerprint recognition chip after optical lens.
Optionally, fingerprint recognition mould group further includes light source, and light source is arranged in screen side, for making the surface reflection of screen
Fingerprint image.
The third aspect, the utility model provide a kind of mobile terminal, including fingerprint recognition mould group as described above.
The optical lens of the utility model, fingerprint recognition mould group and mobile terminal, optical lens are arranged in screen side
In the fingerprint recognition mould group of side, and optical lens is located in the optical path of the fingerprint image of reflector reflection, and optical lens includes hiding
Light part, the loophole on shading piece at least one for imaging.By being set in the fingerprint recognition mould group of screen side
Optical lens receive the fingerprint image of the fingerprint above the screen of reflector reflection, the shading piece in optical lens can prevent to refer to
The optical path of print image passes through, so that the light of fingerprint image be made to pass through from loophole, is clearly stood upside down by loophole formation
Fingerprint image, so that the fingerprint recognition chip in fingerprint recognition mould group be made to be acquired and identify fingerprint image.By
Optical lens is arranged in screen side, can make LCD screen it is this can not self-luminous, the screen that thickness is big, opaque have optics
Shield the function of lower fingerprint recognition.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is made one and is simply introduced, it should be apparent that, the accompanying drawings in the following description is this
Some embodiments of utility model.For those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the structural schematic diagram for the optical lens that the utility model embodiment one provides；
Fig. 2 is the top view for the optical lens that the utility model embodiment one provides；
Fig. 3 is a kind of structural schematic diagram for the fingerprint recognition mould group that the utility model embodiment one provides；
Fig. 4 is another structural schematic diagram for the fingerprint recognition mould group that the utility model embodiment one provides；
Fig. 5 is the structural schematic diagram for the substrate layer that the utility model embodiment one provides；
Fig. 6 is the structural schematic diagram for second of optical lens that the utility model embodiment one provides；
Fig. 7 is the structural schematic diagram for the third optical lens that the utility model embodiment one provides；
Fig. 8 is the structural schematic diagram for the 4th kind of optical lens that the utility model embodiment one provides.
Description of symbols:
1- optical lens；11-shading pieces；111-loopholes；112-substrate layers；113-light shield layers；114-filter
Layer；12-lens；13-barn doors；2-reflectors；3-fingerprint recognition chips；4-fingerprint recognition mould groups；5- screen；6-light
Source.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Embodiment one
As mobile phone shields the arrival in epoch comprehensively, shield lower fingerprint using more and more extensive, wherein to refer under optical profile type screen
Line is the most universal.The problem of due to screen thickness and screen construction, fingerprint technique can be only applied to OLED under current optical panel
Screen.OLED screen curtain has self-luminous, and screen thickness is small, and full screen structure is translucent material, can fill fingerprint recognition
Install the lower section for being placed in OLED screen curtain.Fingerprint identification device includes optical element and optical sensor, the self-luminous of OLED screen curtain
The fingerprint being located above screen can be irradiated by OLED pixel gap, pass through from the reflected light of fingerprint and be located at OLED screen curtain
The optical element of lower section can form fingerprint image, then fingerprint image is conducted the optical sensor to screen, utilize optics
Sensor is acquired and identifies to fingerprint image.
And traditional LCD screen can not self-luminous need external light source, and since the layer of LCD screen causes more
Screen is thicker, and back needs reflector for the reversed screen of the light of external light source, thus screen also can not be transparent, fingerprint recognition
Mould group is difficult to that the lower section of LCD screen is arranged in, this number of features causes fingerprint technique under optical panel that can not apply in LCD screen
On.And OLED screen curtain, for LCD screen, higher cost, production capacity is relatively low, this also results in matched with OLED screen curtain
Fingerprint technique can not be also widely applied under optical panel.
Aiming at the problem that fingerprint technique under optical panel can not be applied to common LCD screen 5, the utility model embodiment one is mentioned
For a kind of optical lens 1.Fig. 1 is the structural schematic diagram for the optical lens that the utility model embodiment one provides.As shown in Figure 1,
Optical lens 1 is arranged in the fingerprint recognition mould group 4 of 5 side of screen, and optical lens 1 is located at the fingerprint of photophore reflection
In the optical path of image, optical lens 1 includes shading piece 11, and there is shading piece 11 at least one to be used for the loophole 111 of imaging.
Firstly, the optical lens 1 of the present embodiment is a part of fingerprint recognition mould group 4, and fingerprint recognition mould group 4 is set to
The side of screen 5, in this way, which 5 lower section of screen should be set to and be difficult to below LCD screen 5 by overcoming fingerprint recognition mould group 4
The problem of fingerprint recognition mould group 4 are set.Using the reflector 2 in the fingerprint recognition mould group 4 of 5 side of screen to 5 top of screen
The fingerprint image of fingerprint reflection is reflected, and optical lens 1 is arranged in the optical path of the fingerprint image of the reflection of reflector 2, is led to
Crossing optical lens 1 makes the fingerprint image of reflection form inverted image reduce, clearly fingerprint image, and later, fingerprint image can shine
It is incident upon in the sensitive surface of fingerprint recognition chip 3, fingerprint image is acquired and is identified by fingerprint recognition chip 3.
Specifically, optical lens 1 forms fingerprint image, reducing, clearly fingerprint image is hidden by shading piece 11
The loophole 111 for imaging is provided on light part 11.The optical path of fingerprint image pass through shading piece 11 when, shading piece 11 its
Remaining part position can prevent passing through for light, and pass through light from loophole 111, by the light of loophole 111 in optical frames
First 1 light emission side forms inverted image reduce, clearly fingerprint image, in this way, using loophole 111 to form diminution and clearly
Fingerprint image, in order to which fingerprint recognition chip 3 is acquired and is identified.
Further, the loophole 111 on shading piece 11 for imaging is at least one, it is generally the case that be can be set
One loophole 111, it can form diminution, clearly fingerprint image；And there is enough spaces in fingerprint recognition mould group 4
In the case of, the size of shading piece 11 can be increased, multiple loopholes 111 can also be set on shading piece 11.It is more by being arranged
A loophole 111, each loophole 111 can form a fingerprint image, and multiple fingerprint image overlappings expose to fingerprint recognition
After chip 3, the readability in each region of fingerprint image can enhance, may make fingerprint recognition chip 3 be easier to acquisition and
Identification.
In order to make fingerprint image by the way that clearer image, the optical frames of the present embodiment can be formed after optical lens 1
First 1 further includes the lens 12 that at least one is used for optically focused, and lens 12 are arranged on shading piece 11 and correspond with loophole 111
Setting, and the optical axis of lens 12 passes through corresponding loophole 111.From the optical path of the reflected fingerprint image of screen 5 by anti-
Light device 2 reflexes to optical lens 1, forms diminution, clearly fingerprint image by the loophole 111 of optical lens 1, and in light transmission
Be additionally provided with lens 12 on hole 111, lens 12 can the optical path to the fingerprint image of formation further converge, more reduced with being formed
, the fingerprint image being more clear, fingerprint recognition chip 3 can be made more rapidly, sensitively to acquire and identify relatively sharp finger
Print image further increases the working efficiency and precision of fingerprint recognition mould group 4.
Fig. 2 is the top view for the optical lens that the utility model embodiment one provides.As shown in Fig. 2, the optical axis of lens 12
By corresponding loophole 111, that is to say, that the center line of lens 12 passes through loophole 111, in this way, reflexing to through reflector 2
The fingerprint image of optical lens 1 is bound to successively pass through loophole 111 and lens 12, regardless of being to first pass through loophole 111 again
By lens 12, still first pass through lens 12 again by loophole 111, can make fingerprint image by optical lens 1 it
Diminution, clearly fingerprint image are formed afterwards, so that fingerprint image can clearly, be completely radiated on fingerprint recognition chip 3, i.e.,
It is to say, the size of the fingerprint image after reducing through loophole 111 and lens 12 can meet wanting for fingerprint recognition chip 3
It asks, fingerprint image can be entirely located in the induction region of fingerprint recognition chip 3, so that fingerprint recognition chip 3 can collect
Complete finger print information；Also, the clarity for exposing to the fingerprint image of fingerprint recognition chip 3 can also meet fingerprint recognition core
The requirement of piece 3 can clearly indicate specific lines by the fingerprint image that loophole 111 and lens 12 are formed, so as to refer to
Line identification chip 3 can accurately identify collected fingerprint image.
Further, lens 12 can be convex lens 12.Convex lens 12 is a kind of common lens of thick middle, thin edge
12, the convex lens 12 of the present embodiment can be a surface as shown in Figure 1 and spherical surface be made, another surface is plane, by lens
The side of 12 planes is assembled with shading piece 11, and the position that shading piece 11 and lens 12 contact is also plane, can make lens
12 and shading piece 11 be easier to be assembled as one；Certainly, the convex lens 12 of the present embodiment is also possible to two sides spherical surface is all made, can
The specific surface shape of the side contacted according to convex lens 12 with occulter determines the surface shape of occulter, makes occulter and convex
Lens 12 can match.Specifically, when the surface shape to convex lens 12 selects, the main fingerprint region according to screen 5
The optical path formed between domain, reflector 2, optical lens 1 and fingerprint recognition chip 3, so that the fingerprint image energy that reflector 2 reflects
It is enough exposed on fingerprint recognition chip 3 by the loophole 111 of optical lens 1 and convex lens 12, convex lens 12 can play poly-
Light makes the clearer effect of fingerprint image, with no restriction to the specific surface shape of convex lens 12.
The loophole 111 of optical lens 1 plays imaging, and lens 12 are to converge the optical path of fingerprint image, makes
The fingerprint image of formation is apparent, imaging can be carried out first with optical path of the loophole 111 to fingerprint image, after imaging
Further sharpening processing is carried out to fingerprint image using lens 12, it is of course also possible to the fingerprint image first reflected reflector 2
The optical path of picture, which carries out convergence by lens 12, keeps its apparent, is forming reduce, clearly fingerprint by loophole 111 later
Image.Therefore, the lens 12 of the present embodiment can be located at the incident side of loophole 111 or the light emission side of loophole 111.
Wherein, lens 12 are located at the situation of the incident side of loophole 111, Fig. 3 is that the utility model embodiment one mentions
A kind of structural schematic diagram of the fingerprint recognition mould group of confession.As shown in figure 3, reflexing to the fingerprint image of optical lens 1 from reflector 2
Optical path first pass through lens 12, lens 12 carry out optical path to pass through loophole 111 after convergence forms clearly fingerprint image
Fingerprint image reducing, being more clear is formed, fingerprint image is exposed into fingerprint recognition chip 3 again later.For lens 12
Positioned at the situation of the light emission side of loophole 111, Fig. 4 is the another kind for the fingerprint recognition mould group that the utility model embodiment one provides
Structural schematic diagram.As shown in figure 4, loophole 111 is first passed through from the optical path that reflector 2 reflexes to the fingerprint image of optical lens 1,
By loophole 111 to form inverted image reduce, clearly fingerprint image, make the fingerprint image to be formed by lens 12 later
The inverted image of picture further reduces and clearly, exposes to fingerprint recognition chip 3 again by the fingerprint image formed after lens 12.
Specifically, using the lens 12 of the present embodiment be plano-convex lens of the surface as spherical surface, another surface for plane
For 12, the contact surface of occulter and lens 12 can be plane, assemble lens 12 and occulter by the plane of lens 12
It is integrated.12 incident side of lens can be spherical surface, and light emission side can be plane；Alternatively, the incident side of lens 12 can be plane,
Light emission side can be spherical surface.As shown in figure 3, lens 12 are located at the incident side of loophole 111, i.e. the optical path of fingerprint image first passes through
Lens 12 are again by loophole 111, and the plane of lens 12 and loophole 111 are bonded in addition, and the spherical surface of lens 12 deviates from occulter,
The spherical surface that then optical path of fingerprint image first passes through lens 12 passes through its plane again, i.e. the incident side of lens 12 is spherical surface, light emission side
For plane；As shown in figure 4, lens 12 are located at the light emission side of loophole 111, i.e. the optical path of fingerprint image first passes through loophole 111
Again by lens 12, then, by being exactly to first pass through the plane for the lens 12 being bonded with loophole 111, then pass through when lens 12
The spherical surface of lens 12, i.e. the incident side of lens 12 is plane, light emission side is spherical surface.
The shading piece 11 of the present embodiment be make reflector 2 reflect fingerprint image optical path cannot pass through shading piece 11 its
Remaining part position, remaining position all prevent light from passing through, so that optical path can be from loophole 111 by forming diminution, clearly referring to
Print image.Specifically, the shading piece 11 of the present embodiment may include the substrate layer 112 of light-permeable and the light shield layer for shading
113, light shield layer 113 is covered in a side surface of substrate layer 112.Substrate layer 112 is the main support construction of optical lens 1, base
Material layer 112 is light-permeable, can be any transparent material with some strength such as crystal, glass, organic material, substrate
Layer 112 does not prevent light from passing through, and the light shield layer 113 to prevent light from passing through is additionally provided on substrate layer 112.
Further, loophole 111 is set on light shield layer 113.The optical path of fingerprint image need to by loophole 111, into
And expose to fingerprint recognition chip 3.If loophole 111 is set on substrate layer 112, when optical path passes through optical lens 1, such as
Shown in Fig. 3 and Fig. 4, either optical path first passes through lens 12 and still first passes through aperture, and due to the setting of light shield layer 113, optical path is equal
It can be blocked on the surface of the light shield layer 113 of incident side side.Therefore, loophole 111 is arranged on light shield layer 113, light
Road can be stopped when passing through light shield layer 113 by other positions of light shield layer 113, and make the light reflected all from loophole 111
Pass through.Certainly, loophole 111 can also run through light shield layer 113 and substrate layer 112, due to 112 light-permeable of substrate layer, thoroughly
Unthreaded hole 111 equally can expose to fingerprint recognition chip 3 by loophole 111 through or not through substrate layer 112, optical path.In order to
Ensure that substrate layer 112 has enough intensity to support entire optical lens 1, only loophole 111 can be arranged in light shield layer
On 113.
Fingerprint recognition chip 3 can be through the light of some other specific band such as natural white light or infrared light and adopt
The finger print information of collection and identification, then, it is just answered by the light that optical lens 1 exposes to the fingerprint image of fingerprint recognition chip 3
It is the light for matching the wave band that fingerprint recognition chip 3 can be acquired and be identified.The light for acquiring and identifying for fingerprint recognition chip 3
The case where line is nature white light, occulter can only include substrate layer 112 and light shield layer 113, and the light by occulter is certainly
Right white light.
And the case where being some specific band light such as infrared light is acquired and identified for fingerprint recognition chip 3, just need
Filtering out other cannot be by the light for the wave band that fingerprint recognition chip 3 acquires and identifies.In this regard,
Fig. 5 is the structural schematic diagram for the substrate layer that the utility model embodiment one provides.As shown in figure 5, the present embodiment
Filter layer 114 has can be set in an at least side surface for substrate layer 112, and filter layer 114 is used to filter the light of preset wavelength.If
Setting the filter layer 114 on 112 surface of substrate layer has the function of filtering out light, and can be made by filter layer 114 cannot be by fingerprint
The light of chip acquisition and identification cannot only be allowed and the matched specific band of fingerprint recognition chip 3 by optical lens 1
Light passes through optical lens 1.
Filter layer 114 can only be set to a side surface of substrate layer 112, alternatively, the both side surface of substrate layer 112 is all provided with
Filter layer 114 is set, this depends on the specific band of required light.For example, it is desired to which the light of 500 nanometers of above band is enable to lead to
Optical lens 1 is crossed, then need to only be arranged in 112 1 side surface of substrate layer and filter out the light shield layer 113 of 500 nanometers or less wave band light；
If desired enable the light of 700 nanometers or less wave bands by optical lens 1, then need to only be arranged in 112 1 side surface of substrate layer
Filter out the light shield layer 113 of 700 nanometers of above band light；And if desired make the light of 500 nanometers or more, 700 nanometers or less wave bands
Line can then need to filter out the screening of 500 nanometers or less wave band light in the setting of 112 1 side surface of substrate layer by optical lens 1
Photosphere 113, and there is provision of the light shield layer 113 for filtering out 700 nanometers of above band light in another side surface of substrate layer 112.
Optical lens 1 provided in this embodiment is mainly used on some mobile terminals such as mobile phone, tablet computer, these movements
The size of terminal is all smaller, and optical lens 1 is arranged in 5 side of screen, and therefore, the size of optical lens 1 is relative to shifting
Dynamic terminal is smaller, allows it to match with mobile terminal.In the present embodiment, the thickness of substrate layer 112 can be in 100-500
Between micron, body supports component of the substrate layer 112 as optical lens 1, thickness determines that can optical lens 1 be placed on
In the space of 5 side of screen, the substrate layer 112 of the present embodiment with a thickness of hundred micron orders, size is small, meets the requirements.Specifically
, the thickness of substrate layer 112 can be 200 microns, 300 microns, 400 microns etc., and the present embodiment is with no restriction.
Equally, the diameter of loophole 111 can be between 100-500 microns.On the one hand, lesser 111 diameter of loophole
Match with the overall dimensions of optical lens 1；On the other hand, the diameter of loophole 111 is small, the finger formed by loophole 111
Print image is also just smaller and is more clear.Specifically, the diameter of loophole 111 can be 200 microns, 300 microns, 400 microns
Deng the present embodiment is with no restriction.
The thickness of lens 12 can be between 10-30 microns.Lens 12 and loophole 111 are correspondingly arranged, the work of lens 12
With being that the optical path of fingerprint image reflected reflector 2 converges, make through the fingerprint image by being formed after lens 12 into
One step reduces, and is more clear, and lens 12 need to be arranged in the optical path of the fingerprint image of the reflection of reflector 2, and through saturating
The optical path of fingerprint image after the convergence of mirror 12 should be able to expose on fingerprint recognition chip 3, therefore, the size of lens 12, position
Set and face type will according to the design of the optical path of fingerprint image need depending on.In general, according to the outer dimension of mobile terminal and
The accommodating space of its 5 side of screen the thickness of lens 12 can be arranged between 10-30 microns, specifically, the thickness of lens 12
It can be 15 microns, 20 microns, 25 microns etc., the present embodiment is with no restriction.
Fig. 6 is the structural schematic diagram for second of optical lens that the utility model embodiment one provides.Fig. 7 is that this is practical new
The structural schematic diagram for the third optical lens that type embodiment one provides.Fig. 8 is the 4 that the utility model embodiment one provides
The structural schematic diagram of kind optical lens.In order to be more clear the fingerprint image by being formed after optical lens 1, make fingerprint image
As being easier to be acquired and identified by fingerprint recognition chip 3, the quantity of loophole 111 can be at least two；Wherein, at least two thoroughly
Unthreaded hole 111 is stacked in the incident direction of light；And/or at least two loophole 111 in light incident direction side by side
Setting.
Specifically, as shown in fig. 6, being stacked in the incident direction of light for three loopholes 111 as shown in the figure, three
A loophole 111 can be set on three shading pieces 11 being stacked, and be correspondingly arranged on lens on each loophole 111
12.In light incident direction, after the optical path of fingerprint image is by first loophole 111 and lens 12, fingerprint image is contracted
Small and sharpening, then by second loophole 111 and lens 12, fingerprint image is further reduced and is more clear, then again
By third loophole 111 and lens 12, fingerprint image further reduces and clear, so that fingerprint image is reduced in multistage
After sharpening, the fingerprint image for finally exposing to fingerprint recognition chip 3 has good clarity.It is, of course, also possible to be
Two loopholes, 111, four loopholes, 111, five loopholes 111 etc. are stacked, and are only numerous implementable sides as shown in the figure
Formula is one such.
As shown in fig. 7, being arranged side by side in light incident direction for four loopholes 111 as shown in the figure, four loopholes
111 can be arranged at intervals on a shading piece 11, be provided with lens 12 on each loophole 111.The finger that reflector 2 reflects
The optical path of print image can enter four loopholes 111 and lens 12 simultaneously, and each group of loophole 111 and lens 12 can make fingerprint
A portion of image is relatively sharp, for example, wherein one group of loophole 111 and lens 12 may make the upper half of fingerprint image
Divide left part apparent, and another group of loophole 111 and lens 12 may make the lower half portion left part of fingerprint image more
Clearly, third group loophole 111 and lens 12 may make the top half right part of fingerprint image apparent, the 4th group of light transmission
Hole 111 and lens 12 may make the lower half portion right part of fingerprint image apparent.Fingerprint recognition is exposed in this way, may make
The fingerprint image of chip 3 is the good finger of the whole clarity for the clear part formation for being integrated with four groups of loopholes 111 and lens 12
Print image.It is of course also possible to be that two loopholes, 111, three loopholes, 111, five loopholes 111 etc. are arranged side by side, in figure
Shown is only that numerous embodiments are one such.
As shown in figure 8, two layers of loophole 111 as shown in the figure to be stacked, wherein every layer of loophole 111 includes
Four loopholes 111 are correspondingly arranged on lens 12 on each loophole 111.As previously mentioned, being laminated in light incident direction
The loophole 111 and lens 12 of setting can make the fingerprint image to be formed apparent, and loophole 111 and lens 12 arranged side by side
Fingerprint image various pieces can be made relatively sharp, both schemes are combined into one, may make through the most end form of optical lens 1
At the whole clarity of fingerprint image be obviously improved, repeat no more.
Specifically, needing to be laminated interval setting multilayer shading piece 11, in shading piece for being stacked loophole 111
The case where loophole 111 and lens 12 are arranged on 11, multilayer shading piece 11 can be attached by barn door 13, to avoid light
The optical path formed after loophole 111 and lens 12 that line passes through first layer shading piece 11 cannot reach the saturating of subsequent shading piece 11
Unthreaded hole 111 and lens 12；For the case where being provided with multiple loopholes 111 and lens 12 on every layer of shading piece 11, can be in phase
It is respectively provided with barn door 13 between adjacent loophole 111 and lens 12, so that optical path can be from the loophole of preceding layer shading piece 11
111 and lens 12 be directed through next layer shading piece 11 loophole 111 and lens 12.
It should be noted that mobile terminal lesser for some outer dimensions, such as mobile phone, it can be set in 5 side of screen
An optical lens 1 only with a loophole 111 and lens 12 is set, that is, can reach to form diminution, clearly fingerprint image；And
In the biggish mobile terminal of some outer dimensions, such as tablet computer, can be arranged in 5 side of screen has multiple be stacked
And/or the optical lens 1 of loophole 111 and lens 12 arranged side by side, so that the clarity of the fingerprint image formed is more preferable, it is right
This, this embodiment is not specifically limited.In addition, the top of multiple loopholes 111 for being stacked and/or being set side by side can also be with
Lens 12 are not provided with, this depends on the clarity of the fingerprint image formed, can be according to the clarity of the fingerprint image of formation
It is no to be enough to make the induction of fingerprint recognition chip 3 to decide whether that lens 12 are arranged in the top of loophole 111.
Embodiment two
The present embodiment provides a kind of fingerprint recognition mould group 4, fingerprint recognition mould group 4 is located at 5 side of screen, fingerprint recognition mould group
4 include optical lens 1 described in fingerprint recognition chip 3, reflector 2 and embodiment one, and reflector 2 is used for 5 surface of screen is anti-
The fingerprint image penetrated reflexes to optical lens 1, and is radiated in the sensitive surface of fingerprint recognition chip 3 after optical lens 1.
The fingerprint recognition mould group 4 of the present embodiment can be applied to traditional LCD screen 5.As shown in Figure 3 or Figure 4, fingerprint recognition
Mould group 4 is located at 5 side of screen, and fingerprint recognition mould group 4 includes reflector 2, optical lens 1 and fingerprint recognition chip 3, reflector 2
For the light of the fingerprint reflection on 5 surface of screen to be reflexed to optical lens 1, optical lens 1 is used for the reflector 2 for making to receive
The light of reflection forms reduce, clearly fingerprint image, then fingerprint image is exposed to the sensitive surface of fingerprint recognition chip 3
On, fingerprint image is acquired and is identified by fingerprint recognition chip 3.
Specifically, as shown in Figure 3 or Figure 4, when the finger contact screen 5 of the user of mobile terminal, light exposes to screen
The finger-print region of the finger contact screen 5 of 5 top of curtain, the fingerprint image formed on screen 5 reflex to reflector 2 by finger,
Fingerprint image is reflexed into optical lens 1 by reflector 2, the optical path that fingerprint image is formed passes through the loophole of optical lens 1
111 and lens 12 after formed reduce, clearly fingerprint image, fingerprint image exposes to fingerprint recognition core by optical lens 1
In the sensitive surface of piece 3, fingerprint recognition chip 3 is acquired and identifies to the fingerprint image received.
Further, fingerprint recognition mould group 4 can also include light source 6, and light source 6 is arranged in 5 side of screen, for making screen
5 surface reflection fingerprint image.As shown in Figure 3 or Figure 4, light source 6 is for emitting beam, and exposes to above screen 5
Finger-print region, so that the fingerprint image formed on screen 5 reflexes to reflector 2 by finger.In the present embodiment, in light source 6, screen
The finger of 5 top of curtain, reflector 2 need to form complete optical path between optical lens 1 and fingerprint recognition chip 3, therefore, can be with
Optical path according to design determines position and the size of a component of fingerprint recognition mould group 4.In addition, for the external light of LCD screen 5
Source 6 is located at the region of fingerprint recognition mould group 4, and external light source 6 can be formed between the other assemblies of fingerprint recognition mould group 4
Complete optical path finally can make fingerprint recognition chip 3 be acquired and identify fingerprint image, and light can not also be separately provided
Source 6, and rely on light source 6 of the external light source 6 of LCD screen 5 itself as fingerprint recognition mould group 4.
Embodiment three
The present embodiment three provides a kind of mobile terminal, and mobile terminal can be mobile phone, tablet computer etc., the shifting of the present embodiment
Dynamic terminal includes fingerprint recognition mould group 4 described in embodiment two.Fingerprint recognition mould group 4 is located at 5 side of screen, fingerprint recognition mould group
4 include optical lens 1 described in fingerprint recognition chip 3, reflector 2 and embodiment one.
As shown in Figure 3 or Figure 4, fingerprint recognition mould group 4 is located at 5 side of screen of mobile terminal, and fingerprint recognition mould group 4 can be with
Including light source 6, reflector 2, optical lens 1 and fingerprint recognition chip 3, light source 6 is for emitting beam and exposing to 5 top of screen
Finger-print region, reflector 2 is used to reflexing to the light that the fingerprint on 5 surface of screen reflects into optical lens 1, and optical lens 1 is used
Reduce, clearly fingerprint image is formed in the light for reflecting the reflector 2 received, then fingerprint image is exposed into fingerprint
In the sensitive surface of identification chip 3, fingerprint image is acquired and is identified by fingerprint recognition chip 3.
Specifically, as shown in Figure 3 or Figure 4, when the finger contact screen 5 of the user of mobile terminal, light exposes to screen
The finger-print region of the finger contact screen 5 of 5 top of curtain, the fingerprint image formed on screen 5 reflex to reflector 2 by finger,
Fingerprint image is reflexed into optical lens 1 by reflector 2, the optical path that fingerprint image is formed passes through the loophole of optical lens 1
111 and lens 12 after formed reduce, clearly fingerprint image, fingerprint image exposes to fingerprint recognition core by optical lens 1
In the sensitive surface of piece 3, fingerprint recognition chip 3 is acquired and identifies to the fingerprint image received.It repeats no more.
The optical lens of the utility model, fingerprint recognition mould group and mobile terminal, optical lens are arranged in screen side
In the fingerprint recognition mould group of side, and optical lens is located in the optical path of the fingerprint image of reflector reflection, and optical lens includes hiding
Light part, the loophole on shading piece at least one for imaging.By being set in the fingerprint recognition mould group of screen side
Optical lens receive the fingerprint image of the fingerprint above the screen of reflector reflection, the shading piece in optical lens can prevent to refer to
The optical path of print image passes through, so that the light of fingerprint image be made to pass through from loophole, is clearly stood upside down by loophole formation
Fingerprint image, so that the fingerprint recognition chip in fingerprint recognition mould group be made to be acquired and identify fingerprint image.By
Optical lens is arranged in screen side, can make LCD screen it is this can not self-luminous, the screen that thickness is big, opaque have optics
Shield the function of lower fingerprint recognition.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (14)
1. a kind of optical lens, which is characterized in that the optical lens is arranged in the fingerprint recognition mould group of screen side,
And the optical lens is located in the optical path of the fingerprint image of reflector reflection, the optical lens includes shading piece, the screening
Loophole on light part at least one for imaging.
2. optical lens according to claim 1, which is characterized in that the optical lens further includes at least one for gathering
The lens of light, the lens are arranged on the shading piece and are arranged in a one-to-one correspondence with the loophole, and the light of the lens
Axis passes through the corresponding loophole.
3. optical lens according to claim 2, which is characterized in that the lens are convex lens.
4. optical lens according to claim 3, which is characterized in that the lens be located at the loophole incident side or
The light emission side of loophole described in person.
5. optical lens according to claim 4, which is characterized in that the incident side of the lens is spherical surface, and light emission side is
Plane；Alternatively,
The incident side of the lens is plane, and light emission side is spherical surface.
6. optical lens according to claim 1-5, which is characterized in that the shading piece includes the base of light-permeable
Material layer and light shield layer for shading, the light shield layer are covered in a side surface of the substrate layer；The loophole is set to
On the light shield layer.
7. optical lens according to claim 6, which is characterized in that an at least side surface for the substrate layer is provided with filter
Photosphere, the filter layer are used to filter the light of preset wavelength.
8. optical lens according to claim 6, which is characterized in that the thickness of the substrate layer is in 100-500 micron
Between.
9. optical lens according to claim 6, which is characterized in that the diameter of the loophole is in 100-500 micron
Between.
10. according to the described in any item optical lens of claim 2-5, which is characterized in that the thickness of the lens is micro- in 10-30
Between rice.
11. optical lens according to claim 1-5, which is characterized in that the quantity of the loophole is at least
Two；
Wherein, at least two loopholes are stacked in light incident direction；And/or at least two loophole
It is arranged side by side in the light incident direction.
12. a kind of fingerprint recognition mould group, which is characterized in that the fingerprint recognition mould group is located at screen side, the fingerprint recognition
Mould group includes that fingerprint recognition chip, reflector and the described in any item optical lens of claim 1-11, the reflector are used for
The fingerprint image that the screen surface reflects is reflexed into the optical lens, and is radiated at after the optical lens described
In the sensitive surface of fingerprint recognition chip.
13. fingerprint recognition mould group according to claim 12, which is characterized in that further include light source, the light source setting exists
The screen side, for making the surface reflection fingerprint image of the screen.
14. a kind of mobile terminal, which is characterized in that including the described in any item fingerprint recognition mould groups of claim 12-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822019566.5U CN209312028U (en) | 2018-12-04 | 2018-12-04 | Optical lens, fingerprint recognition mould group and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822019566.5U CN209312028U (en) | 2018-12-04 | 2018-12-04 | Optical lens, fingerprint recognition mould group and mobile terminal |
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| Publication Number | Publication Date |
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| CN209312028U true CN209312028U (en) | 2019-08-27 |
Family
ID=67675461
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596931A (en) * | 2019-09-18 | 2019-12-20 | Oppo广东移动通信有限公司 | Display screen assembly and electronic equipment |
| WO2021051820A1 (en) * | 2019-09-22 | 2021-03-25 | 神盾股份有限公司 | Fingerprint sensing module and electronic device |
| CN113269012A (en) * | 2020-02-14 | 2021-08-17 | 北京小米移动软件有限公司 | Fingerprint identification device, display screen module, terminal equipment and fingerprint identification method |
-
2018
- 2018-12-04 CN CN201822019566.5U patent/CN209312028U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596931A (en) * | 2019-09-18 | 2019-12-20 | Oppo广东移动通信有限公司 | Display screen assembly and electronic equipment |
| WO2021051820A1 (en) * | 2019-09-22 | 2021-03-25 | 神盾股份有限公司 | Fingerprint sensing module and electronic device |
| CN113269012A (en) * | 2020-02-14 | 2021-08-17 | 北京小米移动软件有限公司 | Fingerprint identification device, display screen module, terminal equipment and fingerprint identification method |
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