CN110414500A - The light channel structure and electronic equipment of integrated form bio-identification device for OLED screen curtain - Google Patents
The light channel structure and electronic equipment of integrated form bio-identification device for OLED screen curtain Download PDFInfo
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- CN110414500A CN110414500A CN201910689573.2A CN201910689573A CN110414500A CN 110414500 A CN110414500 A CN 110414500A CN 201910689573 A CN201910689573 A CN 201910689573A CN 110414500 A CN110414500 A CN 110414500A
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- 230000003287 optical effect Effects 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims description 11
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- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000007 visual effect Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 3
- 238000002834 transmittance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000005622 photoelectricity Effects 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
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- 238000012216 screening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/147—Details of sensors, e.g. sensor lenses
Abstract
The invention discloses the light channel structure and electronic equipment of a kind of integrated form bio-identification device for OLED screen curtain, which includes infrared fileter, low-refraction optical filling material, Microlens array, diaphragm for eliminating stray light, field stop, optical filling material and photoelectric sensor.The present invention is based on the working methods that Microlens on chip collects light intensity, by the optical filling material for filling low-refraction between Microlens array and infrared fileter, reduce the Fresnel reflection loss by infrared fileter and air, air and Microlens layers, increase the light transmittance of optical system, to reach the photoperceptivity for increasing photoelectric sensor；And adjust the visual visual field of Microlens by field stop and diaphragm for eliminating stray light structure and prevent light disturbance, realize fingerprint image acquisition under the OLED screen under ultra-thin spacing.
Description
Technical field
The invention belongs to image acquisition technologies, and in particular to a kind of integrated form bio-identification for OLED screen curtain
The light channel structure and electronic equipment of device.
Background technique
Due to the development of science and technology, OLED screen curtain consumer electronics field mobile phone terminal large-scale application, and along with people
Demand to comprehensive screen aesthetics, the mode that fingerprint knows unlock under shielding are becoming the mainstream of pursuit.Shield lower fingerprint recognition system at present
The optical system of system is respectively positioned on the lower section of OLED screen, since OLED screen transmitance is low, and OLED screen and photoelectric sensor it
Between there are multiple optical elements, the upper and lower surface of multiple optical elements is the air gap, cause light pass through optical element
When upper and lower surface, in interface due to Fresnel reflection loss, the intensity signal received on photoelectric sensor is caused to subtract significantly
It is few.
Summary of the invention
The main purpose of the present invention is to provide a kind of optical path knots of integrated form bio-identification device for OLED screen curtain
Structure and electronic equipment increase optical system light transmittance to realize, achieve the purpose that the photoperceptivity for increasing photoelectric sensor.
To achieve the above object, the present invention provides a kind of optical path of integrated form bio-identification device for OLED screen curtain
Structure, comprising:
Infrared fileter, for filtering out the infrared light in external incident light line；
Microlens array is made of in fixed spacing arrangement multiple Microlens units, is set to described infrared
Below optical filter, and low-refraction optical filling material is filled between the infrared fileter；It is Microlens gusts described
Column are for being collected to photoelectric sensor for the incident ray reflected through OLED screen curtain identification region；
Diaphragm for eliminating stray light is set to below the curved surface of the Microlens unit, is used for across the Microlens
The incident ray of array is across diaphragm for eliminating stray light hole and non-contact area each Microlens unit is incident in absorption
Incident ray；
Field stop is set to the image planes position of the Microlens array, is used for across the diaphragm for eliminating stray light
Incident ray pass through field stop hole and absorb be incident on the field stop non-clear aperature region incident ray；
And
Photoelectric sensor is made of multiple pixel photoelectric conversion regions, is used to the field stop and irradiate to passing through
Incident ray to the pixel photoelectric conversion region is incuded.
It is filled as the further explanation of above-mentioned light channel structure, between the Microlens array and infrared fileter saturating
The low-refraction optical filling material of bright quality, the refractive index of the low-refraction optical filling material be set as 1.2 to
1.33。
As the further explanation of above-mentioned light channel structure, filled out between the Microlens array and the photoelectric sensor
Filled with optical filling material.
As the further explanation of above-mentioned light channel structure, the diaphragm for eliminating stray light is placed in the optical filling material area,
And diaphragm for eliminating stray light hole is filled with optical filling material.
As the further explanation of above-mentioned light channel structure, the field stop is placed in the optical filling material area, and
Field stop hole is filled with optical filling material.
As the further explanation of above-mentioned light channel structure, the field stop passes through described in adjustment aperture control
The corresponding object plane region of Microlens array.
As the further explanation of above-mentioned light channel structure, the Microlens unit and diaphragm for eliminating stray light hole, visual field light
Late hole and pixel photoelectric conversion region correspond and are coaxially disposed.
As the further explanation of above-mentioned light channel structure, the field stop aperture and diaphragm for eliminating stray light array of apertures ginseng
Number is identical as Microlens array parameter.
As the further explanation of above-mentioned light channel structure, the diaphragm for eliminating stray light aperture is equal to or small in Microlens
Unit bore.
The invention also provides a kind of electronic equipments based on integrated form bio-identification device, comprising:
OLED screen curtain, for being emitted beam using the luminescent device in the OLED screen curtain, and on the OLED screen curtain
Surface is reflected, and incident ray is formed；
Light channel structure is set to below the OLED screen curtain, is used for using optical path knot as claimed in claims 1-9
Structure carries out optical treatment to the incident ray and obtains image information.
The beneficial effects of the present invention are: passing through the present invention is based on the working method that Microlens on chip collects light intensity
Between Microlens array and infrared fileter fill low-refraction optical filling material, reduce by infrared fileter with
Air, air and Microlens layers of Fresnel reflection loss, increases the light transmittance of optical system, to reach increase photoelectricity
The photoperceptivity of inductor；And adjusted by field stop and diaphragm for eliminating stray light structure Microlens visual visual field and
Light disturbance is prevented, fingerprint image acquisition under the OLED screen under ultra-thin spacing is realized.
Detailed description of the invention
Fig. 1 is the light channel structure schematic diagram of the integrated form bio-identification device for OLED screen curtain of the invention；
Fig. 2 is OLED screen curtain upper surface object plane area light reflection schematic diagram in the present invention；
Fig. 3 is the Image Acquisition schematic diagram of the optical path in the present invention；
Fig. 4 be the present invention in light dielectric interface Fresnel reflection loss schematic diagram；
Fig. 5 is the electronic devices structure schematic diagram based on integrated form bio-identification device in the present invention.
Wherein appended drawing reference are as follows: finger 100, paddy ridge 101, OLED screen curtain 200, light emitting array 2010, mobile phone key 210,
Mobile phone related sensor 220, fingerprint recognition induction zone 299, infrared fileter 300, low-refraction optical filling material 340,
Microlens array 400, diaphragm for eliminating stray light 500, optical filling material 600, field stop 700, photoelectric sensor 800, light
Electric transition zone 810, DAF glue, FPC cable 1010, reinforcement steel plate 1020.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments,
The present invention will be described in further detail.It should be appreciated that described herein, specific examples are only used to explain the present invention,
It is not intended to limit the present invention.
The primary solutions of the embodiment of the present invention are as follows:
As shown in Figure 1, a kind of light channel structure of the integrated form bio-identification device for OLED screen curtain, comprising:
Infrared fileter, for filtering out the infrared light in external incident light line；
Microlens array is made of in fixed spacing arrangement multiple Microlens units, is set to described infrared
Below optical filter, and low-refraction optical filling material is filled between the infrared fileter；It is Microlens gusts described
Column are for being collected to photoelectric sensor for the incident ray reflected through OLED screen curtain identification region；
Diaphragm for eliminating stray light is set to below the curved surface of the Microlens unit, is used for across the Microlens
The incident ray of array is across diaphragm for eliminating stray light hole and non-contact area each Microlens unit is incident in absorption
Incident ray；
Field stop is set to the image planes position of the Microlens array, is used for across the diaphragm for eliminating stray light
Incident ray pass through field stop hole and absorb be incident on the field stop non-clear aperature region incident ray；
And
Photoelectric sensor is made of multiple pixel photoelectric conversion regions, is used to the field stop and irradiate to passing through
Incident ray to the pixel photoelectric conversion region is incuded.
The present invention passes through the infrared fileter 300, the low-refraction packing material that will from top to bottom set gradually in optical path
340, the integrated processing of Microlens array 400, diaphragm for eliminating stray light 500, field stop 700, optical filling material 600 is in photoelectricity
On inductor 800, infrared fileter 300 is arranged below OLED screen curtain 200, is propagated through using 300 pairs of external worlds of infrared fileter
The Infrared jamming come is filtered out, and the light channel structure device between Microlens array 400 and photoelectric sensor 800 is to OLED
The image information of 200 upper surface of screen carries out screening optically and veiling glare filters out, to realize 200 upper surface of OLED screen curtain
Image information Image Acquisition is carried out on photoelectric sensor 800.
Microlens light channel structure of the invention works under OLED screen curtain 200, acquires the object of image intensity information
Face is the reflection light of the upper surface of OLED screen curtain 200, and as shown in Fig. 2, the light emitting array 2010 in OLED screen curtain 200 is issued
Light 201a, 202a, wherein 201a is indicated after the reflection of screen upper surface, with screen normal at the light of wide-angle, 202a
Indicate the light after the reflection of screen upper surface with screen normal in low-angle.
In an alternate embodiment of the present invention where, the Microlens in light channel structure integrated on optoelectronic induction chip
Array 400 is uniformly arranged and is formed in a fixed spacing by multiple Microlens units, between each Microlens unit there are
Non-contact area.The bore φ of single Microlens unit are as follows: 5 μm≤φ≤12 μm；The F number of single Microlens unit
FNo. are as follows: 1.2≤FNo.≤2；The distance between Microlens unit and photoelectric sensor 800 less than 50 μm, with realization
The unlocked by fingerprint chip solution of extra-thin optical ftngetpnnt acquisidon function.
As shown in figure 3, being that can recognize area in the region that Microlens array 400 projects to 200 upper surface of OLED screen curtain
Domain, wherein finger 100 is pressed when on OLED screen curtain 200, since the paddy ridge 101 of fingerprint is there are difference in height, with OLED screen curtain
Exist when 200 upper surfaces contact and be in close contact and have airspace, the light for causing OLED screen curtain 200 to issue is in the region
Intensity of reflected light has differences, and the present invention is filtered screening to the light intensity in the region, to 200 upper surface of OLED screen curtain
Information in fingerprint is acquired.
The object plane region of Microlens array 400 is the upper surface of 200 glass of OLED screen curtain, which passes through
After Microlens array 400, the optical filling material that is imaged between Microlens array 400 and photoelectric sensor 800
600 regions.
The incident ray across infrared fileter 300 reflected through 200 identification region of OLED screen curtain is irradiated to
The curved surface of Microlens unit carries out light propagation by Snell's law, is imaged at field stop 700.
In an alternate embodiment of the present invention where, it is filled between Microlens array 400 and photoelectric sensor 800
There is optical filling material 600, and be provided with two layers of mechanism of diaphragm, including diaphragm for eliminating stray light 500 and field stop 700；Disappear veiling glare
Diaphragm 500 is placed in 600 region of optical filling material, and diaphragm for eliminating stray light hole is filled with optical filling material 600；Visual field
Diaphragm 700 is placed in 600 region of optical filling material, and field stop hole is filled with optical filling material 600.This implementation
The refractive index of optical filling material 600 is set as 1.5≤n in example3≤1.65。
Diaphragm for eliminating stray light 500 is located at 400 lower section of Microlens array, is made of black light-absorbing substance, is used to limit
The light of non-contact area between Microlens array 400 processed penetrates, and is first of preventing stray light structure.
Field stop 700 is located at the conjugated image surface position of Microlens array 400, and effect is by adjusting visual field light
Late aperture controls the field of view angle Fov of Microlens array 400, that is, controls the regional scope of object plane, only pass through disappear it is miscellaneous
Light after light diaphragm 500 after being then passed through field stop 700, is got on photoelectric sensor 800, is turned by pixel photoelectricity
Change the induction of area 810.Field stop 700 is that the extinction material of black is constituted, by the way that the size in field stop aperture is arranged, with it
The Microlens array 400 is controlled in the object plane region of 200 upper surface of OLED screen curtain, adjusts the view of Microlens array 400
The maximum angle of half field-of view of rink corner Fov, Microlens array 400 is 12 °, i.e. 24 ° of maximum full filed angle.In the present embodiment
Fov=10 ° of Microlens array 400, F number are set as 1.2≤FNo.≤2, being specifically set as FNo.=1.8,
The diameter of Microlens unit is set as 5 μm≤φ≤15 μm, is specifically set as φ=6 μm.
In Microlens light channel structure of the invention, each Microlens unit and diaphragm for eliminating stray light hole, field stop
Hole and pixel photoelectric conversion region 810 correspond and are coaxially disposed.Field stop aperture and diaphragm for eliminating stray light array of apertures ginseng
Number is identical as Microlens array parameter.Diaphragm for eliminating stray light aperture is equal to or small in Microlens unit bore.
In an alternate embodiment of the present invention where, during above-mentioned light acquires, light often passes through two kinds of differences
When the medium of refractive index, Fresnel reflection loss can be generated in the interface of different medium.Its Fresnel reflection loss mode
It is as shown in Figure 4:
Ray Of Light 1000 is from refractive index n1Transparent medium be transferred to refractive index be n2Transparent medium when, at two kinds
The interface of medium can generate reflection light 1000R and transmitted ray 1000T, not examine the absorption loss of medium, then incident ray
1000 light intensity is equal to the sum of reflection light 1000R and the light intensity of refracted light 1000T.The light is let R be in the anti-of interface
Rate is penetrated, if T is the light in the transmitance of interface, is then had:
R+T=1
As entrance ray angle θ1Level off to 0 when, by Fresnel reflection loss formula are as follows:
Then transmitance are as follows:
Wherein n0For the first medium refraction index, n1For second of medium refraction index.
By filling low-refraction optical material 340 between infrared fileter 300 and Microlens array 400, replace
For original the air gap (refractive index ≈ 1), reduces light by infrared fileter 300 and be transferred to 400 mistake of Microlens array
The refringence of interface 900 in journey, to reduce light from infrared fileter 300 to the Fei Nie of Microlens array 400
That reflection loss, increases the transmissivity of optical path acquisition system in the bio-identification device, to realize enhancing photoelectric sensor
Photoperceptivity.
The refractive index of low-refraction packing material 340 is set as 1.2≤n in the present embodiment1≤ 1.33, specifically it is set as n1
The refractive index of=1.26, Microlens array 400 is set as 1.55≤n2≤ 1.7, specifically it is set as n2=1.62, infrared absorption filter
The refractive index of mating plate 300 is set as 1.5≤n0≤ 1.6, specifically it is set as n0=1.51.
The working principle of Microlens light channel structure of the invention are as follows:
The light that OLED screen curtain 200 issues can recognize that region is reflected in screen, and wherein 201a, 201b are wide-angle
Light example, 202a are the low-angle light example of identification region reflection.The light of 200 upper surface of OLED screen curtain reflection is worn
After crossing OLED screen curtain 200, it is then passed through infrared fileter 300 and low-refraction optical filling material 340, is reached down
400 region of Microlens array.
High angle scattered light 201a is irradiated to the region between Microlens array 400, is inhaled by diaphragm for eliminating stray light 500
It receives；Low-angle light 202a and part high angle scattered light 201b is after passing through Microlens 400 in optical filling material 600
Middle continuation transmission downwards；
For part high angle scattered light 201b when being transferred to field stop 700, the conjugate imaging points of the light are located at the visual field light
The non-clear aperature region of door screen 700, is absorbed in field stop 700.Low-angle light 202a is in field stop 700 simultaneously
Conjugate imaging points be located in the same light aperture of field stop 700, continue downwards propagate.
Low-angle light 202a is reached on photoelectric sensor 800 after passing through optical filling material 600, is irradiated to induction core
Photoelectric conversion region 810 on piece pixel, realizes the conversion of photoelectric information, and then it is corresponding to obtain the Microlens array 400
The intensity image information in object plane region.
The intensity signal of corresponding region is pooled to photoelectricity by all Microlens units in Microlens array 400
On inductor 800, to obtain the image intensity information that entire 400 face of Microlens array corresponds to object plane region.
Microlens light channel structure in based on the above embodiment, the present invention also provides one kind to be referred to based on OLED screen curtain
The electronic equipment of line identification, as shown in Figure 5, comprising:
OLED screen curtain, for being emitted beam using the luminescent device in the OLED screen curtain, and on the OLED screen curtain
Surface is reflected, and incident ray is formed；
Light channel structure is set to below the OLED screen curtain, is used for using optical path knot as claimed in claims 1-9
Structure carries out optical treatment to the incident ray and obtains image information.
The present invention realizes and acquires optical path under ultra-thin OLED screen, the Image Acquisition system as fingerprint recognition under OLED screen
One of system and the optical path mode of electronic device, can be applied to one of stack manner of terminal device.Entire fingerprint image
Acquisition system is mounted under mobile phone OLED screen curtain 200, and mobile phone key 210 and mobile phone phase are provided on the outside of mobile phone OLED screen 200
Sensor 220 is closed, when finger presses the fingerprint recognition induction zone 299 above OLED screen, is adopted on photoelectric sensor 800
The image collected is the intensity signal that Microlens array region is right against on screen area, and the intensity signal is converted
Fingerprint identification device, which is supplied to, at gray scale image carries out subsequent analysis and processing；Photoelectric sensor 800 passes through DAF glue, FPC
Cable 1010 etc. is fixed on reinforcement steel plate 1020.
Various changes and improvements may be made to the invention, thickness, the low folding of multilayer such as low-refraction optical filling material 340
Rate material, infrared fileter thickness etc. are penetrated, all fall within the protetion scope of the claimed invention.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this
The principle of invention, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other of essence of the invention
Various specific variations and combinations, these variations and combinations are still within the scope of the present invention.
Claims (10)
1. a kind of light channel structure of the integrated form bio-identification device for OLED screen curtain characterized by comprising
Infrared fileter, for filtering out the infrared light in external incident light line；
Microlens array is made of in fixed spacing arrangement multiple Microlens units, is set to the infrared filtering
Below piece, and low-refraction optical filling material is filled between the infrared fileter；The Microlens array is used for
The incident ray reflected through OLED screen curtain identification region is collected on photoelectric sensor；
Diaphragm for eliminating stray light is set to below the curved surface of the Microlens unit, is used for across the Microlens array
Incident ray across diaphragm for eliminating stray light hole and absorb and be incident on the incident light of non-contact area each Microlens unit
Line；
Field stop is set to the image planes position of the Microlens array, is used for the incidence across the diaphragm for eliminating stray light
Light passes through field stop hole and absorbs the incident ray for being incident on the non-clear aperature region of the field stop；And
Photoelectric sensor is made of multiple pixel photoelectric conversion regions, is used to the field stop and be irradiated to institute to passing through
The incident ray for stating pixel photoelectric conversion region is incuded.
2. the light channel structure for the integrated form bio-identification device of OLED screen curtain as described in claim 1, which is characterized in that
The low-refraction optical filling material of transparent quality, the low folding are filled between the Microlens array and infrared fileter
The refractive index for penetrating rate optical filling material is set as 1.2 to 1.33.
3. the light channel structure for the integrated form bio-identification device of OLED screen curtain as described in claim 1, which is characterized in that
Optical filling material is filled between the Microlens array and the photoelectric sensor.
4. the light channel structure for the integrated form bio-identification device of OLED screen curtain as described in claim 1, which is characterized in that
The diaphragm for eliminating stray light is placed in the optical filling material area, and diaphragm for eliminating stray light hole is filled with optical filling material.
5. the light channel structure for the integrated form bio-identification device of OLED screen curtain as claimed in claim 4, which is characterized in that
The field stop is placed in the optical filling material area, and field stop hole is filled with optical filling material.
6. the light channel structure for the integrated form bio-identification device of OLED screen curtain as claimed in claim 4, which is characterized in that
The field stop controls the corresponding object plane region of the Microlens array by adjustment aperture.
7. the light channel structure of the integrated form bio-identification device for OLED screen curtain as described in claim 1-6 is any, special
Sign is, the Microlens unit and diaphragm for eliminating stray light hole, field stop hole and pixel photoelectric conversion region correspond and
Coaxial arrangement.
8. the light channel structure for the integrated form bio-identification device of OLED screen curtain as claimed in claim 7, which is characterized in that
The field stop aperture and diaphragm for eliminating stray light array of apertures parameter are identical as Microlens array parameter.
9. the light channel structure for the integrated form bio-identification device of OLED screen curtain as claimed in claim 8, which is characterized in that
The diaphragm for eliminating stray light aperture is equal to or small in Microlens unit bore.
10. a kind of electronic equipment based on integrated form bio-identification device characterized by comprising
OLED screen curtain, for being emitted beam using the luminescent device in the OLED screen curtain, and in OLED screen curtain upper surface
It is reflected, forms incident ray；
Light channel structure is set to below the OLED screen curtain, is used for using light channel structure as claimed in claims 1-9 to institute
Incident ray is stated to carry out optical treatment and obtain image information.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689573.2A CN110414500A (en) | 2019-07-29 | 2019-07-29 | The light channel structure and electronic equipment of integrated form bio-identification device for OLED screen curtain |
| PCT/CN2019/121088 WO2021017342A1 (en) | 2019-07-29 | 2019-11-27 | Oled screen fingerprint recognition microlens optical path structure, feature recognition model, and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910689573.2A CN110414500A (en) | 2019-07-29 | 2019-07-29 | The light channel structure and electronic equipment of integrated form bio-identification device for OLED screen curtain |
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| CN110414500A true CN110414500A (en) | 2019-11-05 |
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Cited By (3)
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| CN112149544A (en) * | 2020-09-16 | 2020-12-29 | 瑞芯微电子股份有限公司 | Fingerprint imaging assembly, fingerprint imaging module and electronic equipment |
| WO2021017342A1 (en) * | 2019-07-29 | 2021-02-04 | 上海菲戈恩微电子科技有限公司 | Oled screen fingerprint recognition microlens optical path structure, feature recognition model, and preparation method |
| WO2021126058A1 (en) * | 2019-12-18 | 2021-06-24 | Fingerprint Cards Ab | Biometric imaging device and electronic device |
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| CN112149544A (en) * | 2020-09-16 | 2020-12-29 | 瑞芯微电子股份有限公司 | Fingerprint imaging assembly, fingerprint imaging module and electronic equipment |
| CN112149544B (en) * | 2020-09-16 | 2023-08-08 | 瑞芯微电子股份有限公司 | Fingerprint imaging assembly, fingerprint imaging module and electronic equipment |
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