CN109416736A - Optical image acquisition unit, optical image acquisition system and electronic equipment - Google Patents
Optical image acquisition unit, optical image acquisition system and electronic equipment Download PDFInfo
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- CN109416736A CN109416736A CN201880001565.8A CN201880001565A CN109416736A CN 109416736 A CN109416736 A CN 109416736A CN 201880001565 A CN201880001565 A CN 201880001565A CN 109416736 A CN109416736 A CN 109416736A
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- Prior art keywords
- image acquisition
- optical image
- acquisition unit
- optical
- light
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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
Abstract
The embodiment of the present application discloses a kind of optical image acquisition unit, optical image acquisition system and electronic equipment.The optical image acquisition unit includes: micro lens；First light blocking layer is set to below the micro lens, wherein first light blocking layer is provided with window；Second light blocking layer is set to the micro lens side；Photosensitive unit is set to below first light blocking layer, wherein the micro lens is used to the optical signal above the micro lens converging to the window, and the optical signal is transmitted to the photosensitive unit via the window.The technical solution of the embodiment of the present application is able to ascend the performance of optical image acquisition product.
Description
Technical field
The invention relates to information technology fields, and more particularly, to a kind of optical image acquisition unit, light
Learn image capturing system and electronic equipment.
Background technique
With the high speed development of terminal industry, biometrics identification technology, for example, fingerprint identification technology, increasingly by
People pay attention to.
In biometrics identification technology, optical image acquisition mode is wherein important implementation.With end
The development of product is held, the requirement to living things feature recognition is higher and higher, such as, it is desirable that biggish identification region and lesser assembly
Space, correspondingly, the requirement to optical image acquisition product are also higher and higher.
Therefore, how the performance of improving optical Image Acquisition product, become a technical problem urgently to be resolved.
Summary of the invention
The embodiment of the present application provides a kind of optical image acquisition unit, optical image acquisition system and electronic equipment, energy
The performance of enough improving optical Image Acquisition products.
In a first aspect, providing a kind of optical image acquisition unit, comprising: micro lens；First light blocking layer is set to described
Below micro lens, wherein first light blocking layer is provided with window；Second light blocking layer is set to the micro lens side；It is photosensitive
Unit is set to below first light blocking layer, wherein the micro lens is used for will be from the optical signal above the micro lens
The window is converged to, the optical signal is transmitted to the photosensitive unit via the window.
The optical image acquisition unit of the embodiment of the present application can be set in display screen, it is thus possible to save optical imagery
The assembly space of product is acquired, in addition, optical signal is carried out using micro lens to converge and can be improved image quality, so as to
The performance of improving optical Image Acquisition product.
In some possible implementations, the optical image acquisition unit is set in display screen.
In some possible implementations, the display screen is Organic Light Emitting Diode OLED screen, the optical imagery
Acquisition unit is set to the position between the adjacent color unit of the pixel of the OLED screen.
In some possible implementations, the optical image acquisition unit is set to the anode and yin of the OLED screen
Between pole.
In some possible implementations, the anode and cathode that the photosensitive unit is multiplexed the OLED screen forms light letter
Number detection circuit.
In some possible implementations, the display screen is liquid crystal display LCD screen, the optical image acquisition unit
It is set to the position of the part colours unit of the pixel of the LCD screen.
In some possible implementations, the photosensitive unit is set to the thin film transistor (TFT) TFT layer of the LCD screen.
In some possible implementations, the circuit that the photosensitive unit is multiplexed the TFT layer forms optical signal detecting
Circuit.
In some possible implementations, the photosensitive unit includes photodiode, the photodiode and institute
The storage capacitor for stating the circuit of TFT layer is in parallel.
In some possible implementations, leakage is provided with above the optical image acquisition unit in the LCD screen
Optical channel, the light leakage channel are in the open state when the photosensitive unit detects optical signal.
In some possible implementations, the optical signal of the photosensitive unit detection is used to form one of acquisition image
Pixel.
In some possible implementations, the focus point of the micro lens is located in the window.
In some possible implementations, the window is cylinder.
In some possible implementations, the diameter of the window is greater than 100nm.
In some possible implementations, the quantity of the window is one or more.
In some possible implementations, first light blocking layer and second light blocking layer to visible light or
The transmitance of the light of 610nm above band is less than 20%.
In some possible implementations, the optical image acquisition unit further include: dielectric layer is used for transmission described
Optical signal is set at following at least one: between the micro lens and first light blocking layer, in the window or described first
Between light blocking layer and the photosensitive unit.
In some possible implementations, the material of the micro lens is transparent adhesive tape.
In some possible implementations, the optical image acquisition unit further include: wave filtering layer is set to described micro-
Camera lens is into the optical path between the photosensitive unit, for filtering the optical signal of non-targeted wave band, believes through the light of target wave band
Number.
In some possible implementations, the photosensitive unit is greater than the luminous sensitivity of the optical signal of target wave band
First predetermined threshold, quantum efficiency are greater than the second predetermined threshold.
Second aspect provides a kind of optical image acquisition system, comprising: any possibility of first aspect or first aspect
Implementation in optical image acquisition cellular array.
In some possible implementations, the optical image acquisition unit is set in display screen, the optical picture
As setting period of the acquisition unit in the display screen is greater than or equal to the setting period of the pixel of the display screen.
In some possible implementations, the optical image acquisition system further include: angle of light screening unit,
It is set to above the optical image acquisition unit, for the light through specific incident angle range, stops the specific incidence
Light outside angular range.
In some possible implementations, the optical image acquisition system further include: supporting structure is used to support
The optical image acquisition unit.
In some possible implementations, the supporting structure is set under display screen.
The third aspect provides a kind of electronic equipment, comprising: display screen and any of second aspect or second aspect can
Optical image acquisition system in the implementation of energy, wherein the optical image acquisition system is set in the display screen.
Detailed description of the invention
Fig. 1 is the schematic diagram of the optical image acquisition unit of the application one embodiment.
Fig. 2 is the schematic diagram of OLED display unit.
Fig. 3 is the schematic diagram of OLED color cell.
The setting position view of the optical image acquisition unit of Fig. 4 the application one embodiment.
The schematic diagram of the optical image acquisition unit of another embodiment of Fig. 5 the application.
The setting position view of the optical image acquisition unit of another embodiment of Fig. 6 the application.
Fig. 7 is the schematic diagram of the optical signal detecting circuit of the embodiment of the present application.
Fig. 8 is that the optical image acquisition cellular array of the embodiment of the present application is formed by fingerprint original value schematic diagram.
Fig. 9 is the schematic diagram of the optical image acquisition unit of the application another embodiment.
Specific embodiment
Below in conjunction with attached drawing, technical solutions in the embodiments of the present application is described.
The technical solution of the embodiment of the present application can be applied to various electronic equipments, for example, smart phone, laptop,
The portable or mobiles such as tablet computer, game station calculate equipment and electronic databank, automobile, ATM (automatic teller machine)
Other electronic equipments such as (Automated Teller Machine, ATM), but the embodiment of the present application does not limit this.
The technical solution of the embodiment of the present application can be used for the identification of optical bio feature or other optical image acquisitions,
In, the identification of optical bio feature can also identify, for example, vivo identification other than optical finger print identification for other biological feature
Deng the embodiment of the present application does not also limit this.The technical solution of the embodiment of the present application in order to facilitate understanding, first below to optics
Biometrics identification technology is introduced.
Optical bio feature identification technique carried out using the light returned from the top surface of equipment display component fingerprint induction and
Other inductive operations.The light of the return carries the information of the target (such as finger) contacted with the top surface, by acquiring and detecting
The light of the return realizes particular optical sensor module.The design of optical sensor module can be for by being properly configured to
The optical element of the light returned is acquired and detected to realize desired optical imagery.
Optical bio feature identifies mould group, such as optical finger print mould group, is mainly used for acquiring the biological characteristic letter of user
It ceases (such as information in fingerprint).As one embodiment, the living things feature recognition mould group can be specifically included with optics
The optical bio feature sensor of induction arrays, such as optical fingerprint sensor；The optical sensor array includes multiple optics
Sensing unit (photosensitive unit), and the region of the optical sensor array corresponds to the biology of the living things feature recognition mould group
Collection apparatus region.For example, the physical characteristics collecting region is located among the display area of display screen, therefore, user is being needed
The electronic equipment is unlocked or when other biological signature verification, it is only necessary to by finger pressing be located at it is described
The physical characteristics collecting region of display screen can realize biological characteristic input operation.Since physical characteristics collecting detection can be with
It is realized inside the display area of the display screen, electronic equipment using the above structure comes without the special reserved space in its front
It is arranged fingerprint key (such as Home key), thus can be using screen scheme comprehensively.Therefore, the display area of the display screen can be with
Extend substantially to the entire front of the electronic equipment.
Above-mentioned display screen can be self light emitting display panel, use with self luminous display unit as display picture
Element.For example display screen can be Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display screen, have
Source matrix Organic Light Emitting Diode (Active-Matrix Organic Light-Emitting Diode, AMOLED) is micro-
Type light emitting diode (Micro-LED) display screen.In other alternate embodiments, the display screen may be liquid crystal display
(Liquid Crystal Display, LCD) or other passive light emitting displays, the embodiment of the present application are without limitation.
On the other hand, the display screen is specially touching display screen, can not only carry out picture and show, can also detect
The touch of user or pressing operation, to provide a personal-machine interactive interface for user.For example, in one embodiment, electricity
Sub- equipment may include touch sensor, and the touch sensor can be specially touch panel (Touch Panel, TP),
It can be set in the display screen surface, partially can also integrate or be monolithically integrated into inside the display screen, to be formed
The touching display screen.
By taking display screen is using OLED display screen as an example, the luminescent layer of display screen has single in the OLED display of array arrangement
Element array, the living things feature recognition mould group can use the OLED display screen and be located at the physical characteristics collecting region
Excitation light source of the OLED display unit (i.e. OLED light source) as biological characteristic detection identification.Of course it is to be understood that replacing at other
For in implementation, which can also be provided using built-in light source or external light source for being given birth to
The optical signal of object feature detection identification.In this case, optical image acquisition unit not only can be adapted for OLED such as and show
The self light emitting display panels such as screen can be applicable to non-spontaneous smooth display screen, such as liquid crystal display or other passive luminous
Display screen.Also, the optical sensor array of the living things feature recognition mould group is specially optical detector (Photo detector)
Array (or being photodetector array, photosensitive unit array) comprising multiple optical detectors in array distribution/photosensitive
Unit, the optical detector/photosensitive unit can be used as optical sensor unit as described above.
When finger is touched, presses or adopted close to (for ease of description, referred to collectively herein as pressing) in biological characteristic
When collecting region, the light that the display unit in the physical characteristics collecting region issues occurs to reflect and formed reflected light in finger,
Wherein the reflected light can carry the biological information of user's finger.For example, the light is by user's finger surface
After fingerprint reflects, since the wrinkle ridge of finger print and the reflected light of line paddy are different, reflected light is portable to be had
The finger print information of user.The reflected light returns to display screen and by the photodetector array of living things feature recognition mould group below
Corresponding electric signal is received and is converted to, i.e. biological characteristic detects signal.Electronic equipment is detected based on the biological characteristic
Signal can obtain the biological information of user, and can be verified with further progress biometric matches, to complete
The authentication of active user carries out corresponding operation to the electronic equipment in order to confirm whether it has permission.
It should be understood that electronic equipment further includes cover sheet in specific implementation, the cover board can be specially saturating
Bright cover board, such as glass cover-plate or sapphire cover board are located at the top of the display screen and cover the electronic equipment
Front, and the cover sheet surface is also provided with protective layer.Therefore, in the embodiment of the present application, so-called finger pressing
The display screen can actually refer to that finger presses the protection of square on the display screen cover board or the covering cover board
Layer surface.
In one embodiment, optical bio feature identification mould group can be set in the lower section of display screen, form the lower life of screen
Object feature identifies mould group.With the demand that identification region is increasing, the thickness of mould group also accordingly be will increase, this can occupy again compared with
Large space.In consideration of it, the embodiment of the present application provides a kind of improved optical image acquisition scheme, mould group can be set to aobvious
In display screen, thus the performance of improving optical Image Acquisition product.
Fig. 1 shows the schematic diagram of the optical image acquisition unit 100 of the application one embodiment.
Optical image acquisition unit 100 in Fig. 1 may be constructed a pixel unit of optical image acquisition system.
As shown in Figure 1, optical image acquisition unit 100 may include: micro lens 110, the first light blocking layer 120, second gear
Photosphere 130 and photosensitive unit 140.
First light blocking layer 120 is set to 110 lower section of micro lens；Second light blocking layer 130 is set to described
110 side of micro lens；The photosensitive unit 140 is set to 120 lower section of the first light blocking layer.
First light blocking layer 120 is provided with window 121.Optical signal can pass through from the window 121, and cannot pass through
First light blocking layer 120.
Second light blocking layer 130 of 110 side of micro lens can prevent the optical signal of 110 side of micro lens
Into the micro lens 110, so as to prevent mutual crosstalk between image acquisition units.
For example, first light blocking layer 120 and second light blocking layer 130 are to visible light or 610nm above band
The transmitance of light is less than 20%, than avoiding corresponding light from passing through.Optionally, first light blocking layer 120 and described second light-blocking
Layer 130 can be metal layer.
It should be understood that first light blocking layer 120 and second light blocking layer 130 can use identical light-locking material,
Different light-locking materials can be used, as long as meeting light blocking effect.
The micro lens 110 is used to the optical signal above the micro lens 110 converging to the window 121, institute
It states optical signal and is transmitted to the photosensitive unit 140 via the window 121.
Due to the presence of first light blocking layer 120 and second light blocking layer 130, so that only coming from the micro lens
The optical signal of 110 tops can be transmitted to the photosensitive unit 140 by the window 121.
The micro lens 110 can be the various camera lenses with aggregation feature.Optionally, the focusing of the micro lens 110
Point is located in the window 121.The material of the micro lens can be organic material, such as resin or transparent adhesive tape.
The window 121 is used for the light converged by the micro lens 110.Optionally, institute in first light blocking layer 120
The quantity for stating window 121 can be one or more.Optionally, the window 121 is cylinder, that is, the window 121 can be with
For the aperture in light blocking layer 120.Optionally, the diameter of the window 121 be greater than 100nm, in order to through required light with into
Row imaging.The diameter of the window 121 is also less than predetermined value, to ensure that first light blocking layer 120 can stop not needing
Light.That is, the parameter setting of the window 121 makes the optical image acquisition unit 100 that required optical signal be imaged
Maximumlly be transmitted to the photosensitive unit 140, without the blocking that is maximized of light.For example, the ginseng of the window 121
Number is arranged to the 100 top corresponding region of optical image acquisition unit, and incident optical signal is maximum substantially vertical downward
That changes is transmitted to the photosensitive unit 140, and maximizes and stop other optical signals.
By the setting of the second light blocking layer 130, micro lens 110, the first light blocking layer 120, window 121 and photosensitive unit 140,
Optical signal above micro lens 110 is accumulated to window 121, and is transmitted to photosensitive unit 140 by window 121.In this way,
Photosensitive unit 140 can detecte the optical signal of the corresponding region above micro lens 110, and then can be according to the light of optical signal
It is strong to obtain pixel value.
The optical signal that photosensitive unit 140 detects can be used for being formed a pixel of acquisition image, which indicates the light
Learn the characteristic value of 100 top corresponding region of image acquisition units.That is, what an optical image acquisition unit 100 acquired
Signal forms a pixel of image, in this way, passing through the available sub-picture of multiple optical image acquisition units 100.
The photosensitive unit 140 is for converting optical signals to electric signal.Optionally, the photosensitive unit 140 can be adopted
With complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) device, by one
The semiconductor devices of a PN junction composition, for example, photodiode, has one direction conductive characteristic.Optionally, the photosensitive unit
140 for target wave band optical signal, such as blue and green light, feux rouges or infrared light luminous sensitivity be greater than the first predetermined threshold,
Quantum efficiency is greater than the second predetermined threshold.For example, first predetermined threshold can be 0.5v/lux-sec, second predetermined threshold
It can be 40%.That is, the photosensitive unit 140 for blue light (wavelength is 460 ± 30nm), green light (wavelength is 540 ±
30nm), feux rouges or infrared light (wavelength >=610nm) luminous sensitivity with higher and higher quantum efficiency, in order to detect
Corresponding light.
Optionally, the photosensitive material of the photosensitive unit 140 can select the materials such as hafnium oxide, i.e. high sensitivity, structure
Stable material, but the embodiment of the present application does not limit this.
It should be understood that the above-mentioned parameter of the photosensitive unit 140 can correspond to optical image acquisition needed for light, for example,
If light needed for optical image acquisition is only a kind of light of wave band, the above-mentioned parameter of the photosensitive unit 140 only needs to meet
The requirement of the light of the wave band.
It can be set using the optical image acquisition unit 100 of above-mentioned design in display screen, it is thus possible to save optics
The assembly space of Image Acquisition product, in addition, optical signal is carried out using micro lens to converge and can be improved image quality, thus
It is able to ascend the performance of optical image acquisition product.
In the embodiment of the present application, for different display screens, optical image acquisition unit 100 can be set using corresponding
Meter, is described separately below.
Optionally, in the application one embodiment, when display screen is OLED screen, the optical image acquisition unit
100 can be set the position between the adjacent color unit of the pixel of the OLED screen.
OLED screen is made of many a display units.As shown in Fig. 2, each display unit mainly includes glass substrate, sky
Cave transport layer, organic luminous layer, electron transfer layer, anode and cathode etc., organic luminous layer is in electron transfer layer and hole passes
Between defeated layer, hole transmission layer and electron transfer layer are respectively corresponded and are connect with anode and cathode.Electric current passes through organic after energization
Organic luminous layer can shine after luminescent layer, and organic luminous layer selects different materials that can issue red, green, blue respectively, these
Different colours luminescence unit (color cell) controlled according to certain figure rule can be formed the fixed luminescence unit period (as
The plain period), a red, green, blue color cell has been included at least in each period.
As shown in figure 3, the spacing between red, green, blue color cell generally according to different resolution all in certain distance, such as
570ppi, adjacent color cell distance 45um or so, as long as and the pixel unit spacing of fingerprint collecting is less than 50um, and sense
Light unit arranges size usually in 12.5um or less.12.5umx12.5um be arranged in the region 45umx45um hereinafter, light leakage ratio still
So 75% or so, close to human eye sensitivity 80%, the display effect of display screen is less influenced if photosensitive unit is smaller
Fruit.So the embodiment of the present application arranges suitable optical image acquisition list using gap existing for OLED screen fixed cycle centre
Member, realizes signal acquisition, such as the signal detection of fingerprint, while its sufficiently small does not influence display effect.Fig. 4 is under microscope
OLED screen white light lights effect picture, as shown in Figure 4, optical image acquisition unit 100 can be set in adjacent color unit it
Between position.
Optionally, on the thickness direction of display screen, the optical image acquisition unit 100 is set to the OLED screen
Between anode and cathode.Further optionally, the anode and cathode that the photosensitive unit 140 can be multiplexed the OLED screen is formed
Optical signal detecting circuit.
As shown in figure 5, can be multiplexed to greatest extent original when optical image acquisition unit 100 integrates in OLED screen
Inherent structure in OLED screen, for example, the metallic cathode or anode of multiplexing OLED screen, only replace original hole transmission layer, organic
Luminescent layer and electronic shell transmission.
Optionally, optical signal detecting circuit can also use individual circuit, that is, it is luminous single can not also to be multiplexed OLED screen
The circuit of member, the embodiment of the present application do not limit this.
By taking fingerprint recognition as an example, when finger is pressed into display area, the information in the region is fed back to processor, it can
The fixed luminous zone OLED of regional center setting, this luminous zone provide light source for fingerprint recognition, the position of light source, shape,
Color and wave band can be set as desired.Lighting information feedback is on the fingerprint of pressing, and the light of peaks or valleys reflection is to photosensitive
The light intensity of unit can have differences, and then photosensitive unit experiences different light intensity, and form different earth leakage currents, electricity
The light intensity of the big or small and peaks or valleys feedback of stream is proportional, so as to obtain finger print information.
It should be understood that above-mentioned design is suitable for all light emitting diodes (Light Emitting Diode, LED) class screen, than
Such as OLED, AMOLED, Micro-LED etc..
Optionally, in the application one embodiment, when display screen is LCD screen, the optical image acquisition unit 100
It is set to the position of the part colours unit of the pixel of the LCD screen.
As shown in fig. 6, optical image acquisition unit 100 can occupy the portion of a color cell in pixel.
Optionally, thin film transistor (TFT) (the Thin Film in the LCD screen can be set in the photosensitive unit 140
Transistor, TFT) layer.Further optionally, the circuit that the photosensitive unit 140 can be multiplexed the TFT layer forms light letter
Number detection circuit.
For example, as shown in fig. 7, photosensitive unit 140 can be photodiode shown in figure, with photosensitive material,
Encountering light will form earth leakage current.The photodiode is in parallel with the storage capacitor of the circuit of the TFT layer of LCD screen.
Triode and storage capacitor in the circuit of TFT layer form a circuit for detecting, have leakage current when detecting photodiode
When, i.e., transmission is corresponding compares current data.Light intensity is weak proportional with leakage current.This circuit wants the detecting of electric current
The information that corresponding coordinate information and corresponding leakage current size are fed back by corresponding channel, can be obtained phase in this way
The information of the location information and fingerprint answered.
When optical image acquisition unit 100 integrates in LCD screen, in the optical image acquisition unit in the LCD screen
100 tops will be provided with light leakage channel, and the light leakage channel is in open shape when the photosensitive unit 140 detects optical signal
State.
Specifically, the light intensity variation of top can be sensed to greatest extent in order to ensure being in the photosensitive unit of TFT layer,
TFT layer top structure needs especially to be arranged for photosensitive unit, so as to can pass during photosensitive unit detects optical signal
Defeated enough optical signals that gets off.For example, can be in each layer above TFT layer, such as chromatic filter layer is corresponding in photosensitive unit
Position at be arranged light leakage channel, the light leakage channel at least photosensitive unit detect optical signal when it is in the open state.
In the embodiment of the present application, the information that each optical image acquisition unit 100 obtains can be used for being formed acquisition figure
One pixel of picture.The available entire acquisition image of array formed by multiple optical image acquisition units 100.
By taking fingerprint sensing as an example, each optical image acquisition unit 100 can experience the light intensity that its top is converged, then pass through
Photosensitive unit 140 is converted to electric signal and forms fingerprint original value.The array of optical image acquisition unit 100 obtains entire cog region
Fingerprint original value, as shown in figure 8, finally obtaining fingerprint image in turn.
Optionally, in the application one embodiment, the optical image acquisition unit 100 can also include:
Dielectric layer is used for transmission the optical signal, is set at following at least one:
Between the micro lens 110 and first light blocking layer 120, in the window 121 or first light blocking layer 120
Between the photosensitive unit 140.
The dielectric layer can connect the micro lens 110, first light blocking layer 120 and the photosensitive unit 140.It is described
Dielectric layer is used for transmission the optical signal, that is, can pass through the optical signal.
Optionally, in the application one embodiment, as shown in figure 9, dielectric layer may include:
Transparent dielectric layer 150 is set in the window 121 and above first light blocking layer 120；
Passivation layer 160 is set between the micro lens 110 and the transparent dielectric layer 150.
Optionally, the transparent dielectric layer 150 includes the first transparent dielectric layer 151 and the second transparent dielectric layer 152,
In, second transparent dielectric layer 152 is for connecting first transparent dielectric layer 151 and the passivation layer 160.
First transparent dielectric layer 151 covers first light blocking layer 120, may be implemented to first light blocking layer
120 protection.In the imperfect situation of combination of first transparent dielectric layer 151 and the passivation layer 160, it can use
Better second transparent dielectric layer 152 is combined to connect first transparent dielectric layer 151 and described with the passivation layer 160
Passivation layer 160.
For example, the passivation layer 160 can use organic material identical with the micro lens, first transparent medium
Layer 151 can be silica, and second transparent dielectric layer 152 can be silicon nitride, to realize the connection between them.
Optionally, the micro lens 110 can be structure as a whole with the passivation layer 160.That is, the micro lens
110 can be process with the passivation layer 160 by the organic material of one.
Optionally, the micro lens 110 can not also be structure as a whole with the passivation layer 160, but also can use
Different materials.It, between them can be in the imperfect situation of combination of the micro lens 110 and the passivation layer 160
It is attached using other articulamentums.
Optionally, in the application one embodiment, the optical image acquisition unit 100 can also include:
Wave filtering layer is set to the micro lens 110 into the optical path between the photosensitive unit 140, for filtering non-mesh
The optical signal of nominal band, through the optical signal (i.e. the optical signal of wave band needed for optical image acquisition) of target wave band.
For example, can in the optical path between arbitrary medium layer plated film, formed wave filtering layer.Optionally, wave filtering layer is to target wave
Transmitance >=80% of the light of section, to cutoff rate >=80% of the light of non-targeted wave band.
The embodiment of the present application also provides a kind of optical image acquisition system, which includes above-mentioned
Apply for the array of the optical image acquisition unit 100 of embodiment.
In optical image acquisition system, a pixel of the corresponding acquisition image of each optical image acquisition unit 100, light
It learns image capturing system and acquired image is obtained by the array of multiple optical image acquisition units 100.
The optical image acquisition unit is set in display screen, for example, being set to display screen using aforementioned various modes
It is interior.Optionally, setting period of the optical image acquisition unit 100 in the display screen is greater than or equal to the display screen
Pixel the setting period.
Optionally, the quantity of every row of the array or the optical image acquisition unit 100 in each column is not less than 10.
It should be understood that the setting period of optical image acquisition unit 100 or quantity can be according to the requirements of image resolution ratio, figure
The factors such as the size as pickup area and set, the embodiment of the present application does not limit this.
Optionally, the optical image acquisition system further include:
Angle of light screening unit is set to 100 top of optical image acquisition unit, for penetrating specific incidence
The light of angular range stops the light outside the specific incident angle range.
Angle of light screening unit is for carrying out angle screening.For example, the incidence that angle of light screening unit requires
Angle can be very small, to select optical signal incident substantially vertical downward.
Optionally, the optical image acquisition system can also include: supporting structure, be used to support the optical imagery
Acquisition unit.Further optionally, the supporting structure can be set under display screen, to realize to optical image acquisition list
The support of member.
It should be understood that the optical image acquisition system can also include corresponding processing chip etc., the embodiment of the present application pair
This is not limited.
The embodiment of the present application also provides a kind of electronic equipment, which may include display screen and this above-mentioned Shen
Please embodiment optical image acquisition system, wherein the optical image acquisition system is set in the display screen.
The electronic equipment can be any electronic equipment with display screen.
Display screen can be using the display screen in above description, such as OLED screen or LCD screen.The related description of display screen with
And wherein the set-up mode of optical image acquisition unit can be with reference to the associated description in above description, for sake of simplicity, herein not
It repeats again.
It should be understood that the specific example in the embodiment of the present application is intended merely to that those skilled in the art is helped to more fully understand
The embodiment of the present application, rather than limit the range of the embodiment of the present application.
It should be understood that the term used in the embodiment of the present application and the appended claims is only merely for the specific reality of description
The purpose for applying example, is not intended to be limiting the embodiment of the present application.For example, being made in the embodiment of the present application and the appended claims
The "an" of singular, " above-mentioned " and "the" are also intended to including most forms, unless context clearly shows that other
Meaning.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member can be realized with electronic hardware, computer software, or a combination of the two, can in order to clearly demonstrate hardware and software
Interchangeability generally describes each exemplary composition and step according to function in the above description.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
Scope of the present application.
In several embodiments provided herein, it should be understood that disclosed system, device can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.In addition, shown or discussed phase
Mutually between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication of device or unit
Connection is also possible to electricity, mechanical or other form connections.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.Some or all of unit therein can be selected to realize the embodiment of the present application scheme according to the actual needs
Purpose.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, is also possible to two or more units and is integrated in one unit.It is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should all cover within the scope of protection of this application.Therefore, the protection scope of the application should be with right
It is required that protection scope subject to.
Claims (26)
1. a kind of optical image acquisition unit characterized by comprising
Micro lens；
First light blocking layer is set to below the micro lens, wherein first light blocking layer is provided with window；
Second light blocking layer is set to the micro lens side；
Photosensitive unit is set to below first light blocking layer, wherein the micro lens will be for that will come from above the micro lens
Optical signal converge to the window, the optical signal is transmitted to the photosensitive unit via the window.
2. optical image acquisition unit according to claim 1, which is characterized in that the optical image acquisition unit setting
In in display screen.
3. optical image acquisition unit according to claim 2, which is characterized in that the display screen is organic light-emitting diodes
Pipe OLED screen, the optical image acquisition unit are set to the position between the adjacent color unit of the pixel of the OLED screen.
4. optical image acquisition unit according to claim 3, which is characterized in that the optical image acquisition unit setting
Between the anode and cathode of the OLED screen.
5. optical image acquisition unit according to claim 4, which is characterized in that the photosensitive unit is multiplexed the OLED
The anode and cathode of screen forms optical signal detecting circuit.
6. optical image acquisition unit according to claim 2, which is characterized in that the display screen is liquid crystal display LCD
Screen, the optical image acquisition unit are set to the position of the part colours unit of the pixel of the LCD screen.
7. optical image acquisition unit according to claim 6, which is characterized in that the photosensitive unit is set to described
The thin film transistor (TFT) TFT layer of LCD screen.
8. optical image acquisition unit according to claim 7, which is characterized in that the photosensitive unit is multiplexed the TFT
The circuit of layer forms optical signal detecting circuit.
9. optical image acquisition unit according to claim 8, which is characterized in that the photosensitive unit includes two pole of photoelectricity
Pipe, the photodiode are in parallel with the storage capacitor of the circuit of the TFT layer.
10. optical image acquisition unit according to any one of claims 6 to 9, which is characterized in that in the LCD screen
Light leakage channel is provided with above the optical image acquisition unit, optical signal is detected in the photosensitive unit in the light leakage channel
When it is in the open state.
11. optical image acquisition unit according to any one of claim 1 to 10, which is characterized in that the photosensitive list
The optical signal of member detection is used to form a pixel of acquisition image.
12. optical image acquisition unit according to any one of claim 1 to 11, which is characterized in that the micro lens
Focus point be located in the window.
13. optical image acquisition unit according to any one of claim 1 to 12, which is characterized in that the window is
It is cylindrical.
14. optical image acquisition unit according to claim 13, which is characterized in that the diameter of the window is greater than
100nm。
15. according to claim 1 to optical image acquisition unit described in any one of 14, which is characterized in that the window
Quantity is one or more.
16. according to claim 1 to optical image acquisition unit described in any one of 15, which is characterized in that the first gear
Photosphere and second light blocking layer are to the transmitance of the light of visible light or 610nm above band less than 20%.
17. according to claim 1 to optical image acquisition unit described in any one of 16, which is characterized in that the optical picture
As acquisition unit further include:
Dielectric layer is used for transmission the optical signal, is set at following at least one:
Between the micro lens and first light blocking layer, in the window or first light blocking layer and the photosensitive unit it
Between.
18. according to claim 1 to optical image acquisition unit described in any one of 17, which is characterized in that the micro lens
Material be transparent adhesive tape.
19. according to claim 1 to optical image acquisition unit described in any one of 18, which is characterized in that the optical picture
As acquisition unit further include:
Wave filtering layer is set to the micro lens into the optical path between the photosensitive unit, for filtering the light of non-targeted wave band
Signal, through the optical signal of target wave band.
20. according to claim 1 to optical image acquisition unit described in any one of 19, which is characterized in that the photosensitive list
Member is greater than the first predetermined threshold for the luminous sensitivity of the optical signal of target wave band, and quantum efficiency is greater than the second predetermined threshold.
21. a kind of optical image acquisition system characterized by comprising
According to claim 1 to optical image acquisition cellular array described in any one of 20.
22. optical image acquisition system according to claim 21, which is characterized in that the optical image acquisition unit is set
It is placed in display screen, setting period of the optical image acquisition unit in the display screen is greater than or equal to the display screen
Pixel the setting period.
23. the optical image acquisition system according to claim 21 or 22, which is characterized in that the optical image acquisition system
System further include:
Angle of light screening unit is set to above the optical image acquisition unit, for penetrating specific incident angle model
The light enclosed stops the light outside the specific incident angle range.
24. the optical image acquisition system according to any one of claim 21 to 23, which is characterized in that the optical picture
As acquisition system further include:
Supporting structure is used to support the optical image acquisition unit.
25. optical image acquisition system according to claim 24, which is characterized in that the supporting structure is set to aobvious
Under display screen.
26. a kind of electronic equipment characterized by comprising display screen and
The optical image acquisition system according to any one of claim 21 to 25, wherein the optical image acquisition system
Optical image acquisition unit in system is set in the display screen.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/106965 WO2020056728A1 (en) | 2018-09-21 | 2018-09-21 | Optical image collection unit, optical image collection system, and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109416736A true CN109416736A (en) | 2019-03-01 |
Family
ID=65462605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880001565.8A Pending CN109416736A (en) | 2018-09-21 | 2018-09-21 | Optical image acquisition unit, optical image acquisition system and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109416736A (en) |
| WO (1) | WO2020056728A1 (en) |
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| CN111164607A (en) * | 2019-07-12 | 2020-05-15 | 深圳市汇顶科技股份有限公司 | Fingerprint detection device and electronic equipment |
| CN111373412A (en) * | 2019-04-10 | 2020-07-03 | 深圳市汇顶科技股份有限公司 | Optical fingerprint device and electronic equipment |
| WO2021014250A1 (en) * | 2019-07-23 | 2021-01-28 | 3M Innovative Properties Company | Optical system including microlenses and light-blocking structures |
| WO2021189478A1 (en) * | 2020-03-27 | 2021-09-30 | 深圳市汇顶科技股份有限公司 | Fingerprint detection apparatus and electronic device |
| US11321957B2 (en) | 2019-04-10 | 2022-05-03 | Shenzhen GOODIX Technology Co., Ltd. | Optical fingerprint apparatus and electronic device |
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| CN111523448B (en) * | 2020-04-22 | 2023-04-28 | 上海思立微电子科技有限公司 | Optical fingerprint identification device and electronic equipment with under-screen optical fingerprint identification |
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| WO2020056728A1 (en) | 2020-03-26 |
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