CN109791599A

CN109791599A - Optical sensor module under the screen that fingerprint incudes on screen

Info

Publication number: CN109791599A
Application number: CN201780047331.2A
Authority: CN
Inventors: 皮波; 何毅
Original assignee: Shenzhen Huiding Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2016-09-17
Filing date: 2017-08-03
Publication date: 2019-05-21
Anticipated expiration: 2037-08-03
Also published as: EP3479295A4; WO2018049944A1; EP3479295A1; CN109791599B

Abstract

Provide equipment (200) and optical sensor module (702), for providing fingerprint optical sensor on screen by using optical sensor module under screen (702), optical sensor module (702) captures and detects the return light for displaying images and by the reflection of the top surface of screen assembly (423) issued by LCD display screen under the screen.

Description

Optical sensor module under the screen that fingerprint incudes on screen

Priority claim and related application

This patent document requires the equity and priority of following earlier patent application: (1) Shen submitted on the 17th of September in 2016 Please number for 62/396,153, the beauty of entitled " optical sensor module under the LCD screen that fingerprint incudes on screen " State's temporary patent application；Submit on October 25th, (2) 2016 application No. is 62/412,777, it is entitled " for screen The U.S. Provisional Patent Application of optical sensor module under the LCD screen of upper fingerprint induction "；And on March 7th, (3) 2017 mentions Hand over application No. is 62/468,337, it is entitled " for by the periphery tasks column display area in device display into The U.S. Provisional Patent Application of optical sensor module under the LCD screen that fingerprint incudes on row screen ".

This patent document also require to submit on June 7th, 2017 application No. is 15/616,856, entitled " use The equity of the U.S. Patent application of the optics collimator of optical sensor module under the screen that fingerprint on screen incudes " and preferential Power, and be the continuous application part of above-mentioned U.S. Patent application.Above-mentioned U.S. Patent application 15/616,856 also requires following The equity and priority of earlier patent application: (1) 2016 year June 7 day submit application No. is 62/347,073 U.S. is interim Patent application；Submit on July 18th, (2) 2016 application No. is 62/363,832 U.S. Provisional Patent Applications；(3) 2016 years Submitted July 18 application No. is 62/363,823 U.S. Provisional Patent Applications；The application submitted on January 31 in (4) 2017 years Number be 15/421,249 U.S. Patent application (as its continuous application part), also require the power of following earlier patent application Benefit and priority: submit on January 31st, (5) 2016 application No. is 62/289,328 U.S. Provisional Patent Applications；(6)2016 Submit on May 2, application No. is 62/330,833 U.S. Provisional Patent Applications；The application submitted on June 7 in (7) 2016 years Number be 62/347,073 U.S. Provisional Patent Application；And the international patent application no that on June 20th, (8) 2016 submits is PCT/US2016/038445 (as its continuous application part), and the Publication No. WO2016/ disclosed on December 22nd, 2016 205832 international patent application, also require on June 18th, (9) 2015 submit application No. is 62/181,718 U.S. to face When patent application equity and priority.

In addition, this patent document also require to submit on January 31st, 2017 application No. is 15/421,249, denomination of invention For the equity and priority of the U.S. Patent application of " optical sensor module under the screen that fingerprint incudes on screen ".The U.S. Patent application 15/421,249 also requires the equity and priority of following earlier patent application: (1) on January 31st, 2016 submits Application No. is 62/289,328 U.S. Provisional Patent Applications；Submit on May 2nd, (2) 2016 application No. is 62/330,833 U.S. Provisional Patent Application；Submit on June 20th, (3) 2016 application No. is 62/347,073 US provisional patent Shens Please；And (4) 2016 international patent application no submitted on June 20, are that PCT/US2016/038445 is (continuous as its part Application) international patent application, also require on June 18th, (5) 2015 submit application No. is 62/181,718 U.S. to face When patent application equity and priority.

The complete disclosure of above-mentioned patent application is incorporated by reference into a part of this patent document.

Technical field

This patent document is related to based in electronic equipment (for example, mobile device, wearable device or bigger system) Optical sensor is able to carry out the optical sensor mould of one or more inductive operations of fingerprint or other parameters measurement etc. Block.

Background technique

Various sensors can be realized in electronic equipment or system, to provide certain desired functions.

The sensor for realizing user authentication is an example of the sensor for equipment, which includes portable or move It is dynamic to calculate equipment (for example, kneetop computer, tablet computer, smart phone), game system, various databases, information system or more Mass computing machine control system, and User identification mechanism can be used to protect personal data and prevent unwarranted visit It asks.User authentication on electronic equipment can be executed by one or more forms of biometric identifier, this biology Characteristic identifier can be used alone or use on the basis of ordinary cryptographic authentication method.One kind of biometric identifier is general It is exactly the fingerprint pattern of people all over form.Fingerprint sensor can it is built-in in the electronic device, to read the fingerprint pattern of user, make Obtaining the equipment can only be unlocked by the authorized user of the equipment by authenticating the fingerprint pattern of the authorized user.For electronic equipment Or another example of the sensor of system is biomedical sensor, for example, the wearable of similar wrist wearing devices or wrist-watch etc. sets Heartbeat sensor in standby.In short, different sensors can be provided in electronic equipment, with realize different inductive operation and Function.

Fingerprint can be used for user authentication access electronic equipment, computer control system, electronic databank or information system, both The one or more authentication methods that may be used as individual authentication method or combination cipher authentication method etc. use.For example, The equipment includes that portable or mobile calculates equipment (for example, kneetop computer, tablet computer, smart phone) and game system, can It protects personal data to use User identification mechanism and prevents unwarranted access.For another example, based on tissue or enterprise The equipment or system of calculation machine or computer control, which should be protected to, only allows authorized person to access, to protect the tissue or enterprise Equipment or system information or use.The letter stored in portable device and the database of computer control, equipment or system Breath can be substantially personal information, such as personal contact person or telephone directory, personal photo, personal health information or other people letter Breath, or by tissue or the confidential information that is exclusively used by of enterprise, as Business Financial Information, employee's data, business secret and Other Proprietary Informations.If the safety of access electronic equipment or system is damaged, these data may be visited by other people It asks, causes the forfeiture of individual privacy or the loss of valuable confidential information.Other than the safety of information, protect to calculating The access of machine and the equipment or system of computer control also allow to ensure the equipment controlled by computer or computer processor or The use of system, such as the automobile and the other systems such as ATM of computer control.

The safety of the systems such as the system of equipment or electronic databank, computer control to mobile device etc. is visited Asking can be realized by different modes, such as use user password.However, password easily can be transmitted or obtain, and This property of password can reduce security level.Moreover, user needs to remember password to use electronic equipment or system, and If user forgets the password, user needs to take certain password recovery processes to be authenticated or otherwise be obtained again The access to equipment is obtained, this process may be troublesome and has various practical limitations and inconvenience for a user.It is a People's fingerprint recognition can be used to implement user authentication, associated with password certain to mitigate while enhancing Information Security Undesirable effect.

It is a to protect that User identification mechanism can be used in electronic equipment or system including portable or mobile calculating equipment People or other confidential datas, and prevent unwarranted access.User authentication on electronic equipment or system can pass through life One or more forms of object characteristic identifier execute, and this biometric identifier can be used alone or in ordinary cryptographic It is used on the basis of authentication method.A kind of form of biometric identifier is exactly the fingerprint pattern of people.Fingerprint sensor can be with It is built in electronic equipment or information system, to read the fingerprint pattern of user, so that the equipment can only be by the authorization of the equipment User is unlocked by authenticating the fingerprint pattern of the authorized user.

Summary of the invention

Optical sensor module can be placed under liquid crystal display (liquid crystal display, LCD) screen with Optical sensor function including optical finger print induction is provided.In some implementations, optical sensor is provided, for determining contact Object whether come from living person.

On the one hand, disclosed technology can be used for constructing one kind and can be set by the electronics that optical sensor detects fingerprint It is standby, comprising: liquid crystal display (liquid crystal display, LCD) screen provides touch sensible operation and including LCD Display panel structure, to show image；Top clear is formed on the device screen, is grasped as the touch sensible User's touch interface of work and as being used for transmission the light from the display panel structure so that image to be shown to the boundary of user Face；And optical sensor module, it is located at below the display panel structure, is examined with receiving the detection light across the LCD screen Survey fingerprint, wherein the optical sensor module include receive the detection light optics collimator optics collimator array and Receive the optic sensor array of the optical sensor of the detection light from the optics collimator array.

On the other hand, disclosed technology can be used for constructing one kind and can be set by the electronics that optical sensor detects fingerprint Standby, which includes: (1) liquid crystal display (liquid crystal display, LCD) screen, provides touch sensible behaviour Make and including LCD display panel structure, to show image；LCD backlight optical module is coupled to the LCD screen to generate this The backlight of LCD screen, for showing image；(2) top clear is formed on the device screen, as the touch User's touch interface of inductive operation and as being used for transmission the light from the display panel structure so that image is shown to use The interface at family；(3) optical sensor module is located at below the LCD display panel structure, is reflected with receiving from the top clear And detection light that pass through the LCD screen detect fingerprint；(4) one or more probe sources, with the LCD backlight optical module point From being located at below LCD display panel structure, to generate the detection light across the LCD display panel structure, and then illuminate the top Specified fingerprint induction region on portion's hyaline layer, the fingerprint induction region are visually distinct from the peripheral region of the top clear Domain places finger for user and carries out optical finger print induction；And (5) device control module, it is coupled to the optical sensor mould Block, and handle the output of the optical sensor module, with determine the fingerprint detected by the optical sensor module whether with award The fingerprint matching of user is weighed, and in addition to for other than detecting fingerprint, the biology for being also different from fingerprint by optical sensor detection to be special Parameter is levied, to show associated with the fingerprint detected at the top clear whether touch from living person.

In another aspect, disclosed technology, which can be used for constructing one kind, to be set by the electronics that optical sensor detects fingerprint Standby, which includes: liquid crystal display (liquid crystal display, LCD) screen, provides touch sensible operation simultaneously And including LCD display panel structure, to show image；LCD backlight optical module is coupled to the LCD screen to generate the LCD screen The backlight of curtain, to show image；Top clear is formed on the LCD screen, as the use operated for the touch sensible Family touch interface and as being used for transmission the light from the display panel structure so that image to be shown to the interface of user；Optics Sensor module is located at below the LCD panel construction, detects fingerprint to receive the light returned from the top clear.The light Learning sensor module includes transparent block, which contacts with the panel substrate, comes from the display panel structure to receive Light, further include receive the light optic sensor array and by the light received in the transparent block be imaged onto the optics pass Optical imagery module on sensor array.One or more probe sources are separated with the LCD backlight optical module, and it is aobvious to be located at the LCD Show below panel construction, to generate the detection light across the LCD display panel structure, and then illuminates in the top clear Specified fingerprint induction region, the fingerprint induction region are visually distinct from the peripheral region of the top clear, are used for user It places finger and carries out optical finger print induction.

The following drawings, description and claims are to above and other aspect of disclosed technique, its implementation and spy Sign provides more detailed description.

Detailed description of the invention

Fig. 1 is the exemplary block diagram with the system of fingerprint induction module, which can be implemented as including in this document Disclosed optical fingerprint sensor.

Fig. 2A and 2B shows an exemplary realization of electronic equipment 200, and the electronic equipment 200 is aobvious with touch sensible Show screen assembly and the optical sensor module below the touch inductive display screen curtain component.

Fig. 3 A and 3B show the example for realizing the equipment of the optical sensor module in Fig. 2A and 2B.

Fig. 4 A and Fig. 4 B show optics for realizing Fig. 2A and Fig. 2 B design, below display screen assembly and pass The example of one implementation of sensor module.

Fig. 5 A, 5B and 5C are shown for returning under two kinds of different optical conditions from the induction region in the sensitive surface of top Light signal generate, in order to understand the operation of optical sensor module under screen.

Fig. 6 A-6C, 7,8A-8B, 9 and 10A-10B show the example design of optical sensor module under screen.

Figure 11 show under different construction conditions by fingerprint induction region of the image-forming module in top clear at Picture, wherein the fingerprint induction region is imaged on optic sensor array by imaging device, and the imaging device can be light It learns transmission or optical reflection.

Figure 12 shows fingerprint sensor for reducing or eliminating the undesirable tribute from bias light in fingerprint induction The example for the operation offered.

Figure 13 shows the process for operating optical sensor module under the screen for capturing fingerprint pattern.

Figure 14,15 and 16, which are shown by using the bright finger of two different colors of illumination, to be determined and LCD display screen The object of contact whether be living person's finger a part operating process example.

Figure 17 A-17B, 18 and 19A-19C show the optics collimator design for optical finger print induction, are adapted for carrying out Optical sensor module technology under disclosed screen.

Figure 20,21,22A and 22B show the various designs that fingerprint induction is carried out using optical sensor module under screen Example, wherein under the screen optical sensor module use optics collimator array or pinhole array, will carry fingerprint believe The signal light of breath is directed toward optic sensor array.

Figure 23 and 24 shows the example of optical sensor module under the screen with optics collimator.

Figure 25 shows the example of optics collimator array, which is reduced using optical filtering and reach screen The bias light of photodetector array in the lower optical sensor module of curtain.

Figure 26 A, 26B, 27 and 28 show showing for the optics collimator design for the optical sensor under LCD display screen Example.

Figure 29,30 and 31 show when designing optical sensor module based on the improved optics of pinhole camera effect at As resolution ratio.

Figure 32 is shown optical sensor module under the LCD screen for being carried out optical sensor using optics pinhole array and shown Example.

Figure 33 includes Figure 33 A and 33B, and shows the LCD display panel with deflection optical or diffraction device or layer Under optical fingerprint sensor example.

Figure 34 A, 34B and 34C show the example for the LCD diffusing layer design of optical sensor under improved LCD screen.

Figure 35 A and 35B show the example for the reflecting layer the LCD design of optical sensor under improved LCD screen.

Figure 36 shows the example for the LCD light source design of optical sensor under improved LCD screen.

Figure 37 shows the example for the enhancing characteristic of optical sensor under improved LCD screen.

Figure 38 shows the example for the LCD waveguide design of optical sensor under improved LCD screen.

Figure 39 is shown for the LCD backlight light source of optical sensor under improved LCD screen and the example of lighting source.

Figure 40 shows two different fingerprint patterns of the same finger under different pressing forces: the fingerprint that slightly presses and The fingerprint of severe pressing.

Specific embodiment

Electronic equipment or system can be equipped with finger print identifying mechanism, to improve the safety of access equipment.This electronics Equipment or system may include portable or mobile calculate equipment, such as smart phone, tablet computer, wrist-worn device and other Wearable or portable device further includes bigger electronic equipment or system, such as portable or desktop form individual calculus Machine, ATM, for business or government use various terminals to various electronic systems, database or information system and including vapour Vehicle, ship, train, aircraft and other motorized traffic systems.

Fingerprint induction is using or is needing in the mobile application having secure access to and other application to be useful.For example, fingerprint Induction may be used to provide the secure access to mobile device and the secure financial transactions including online shopping.It is desired It is that robust and reliable fingerprint including being suitable for mobile device and other application incude.In movement, portable or wearable set In standby, since the space in these equipment is limited, it is especially considering that the demand to the maximum display area on locking equipment, it is expected that The occupancy that fingerprint sensor incudes fingerprint is minimized or is eliminated.

In order to be seen by the user, the top of the display screen is necessarily passed through by the light for displaying images that display screen generates Face.Finger can touch the top surface, to be interacted with the light at the top surface so that reflection at the surface region of the touch or The light of scattering carries the spatial image information of the finger, and is back to the display panel below the top surface.It is aobvious in touch sensible Show in equipment, top surface is the touch sensing interface engaged with user, and light for displaying images and user's finger or hand it Between this interaction be constantly occurring, but the light of this carrying information for being back to display panel is largely wasted, and It is not used by big multi-touch sensing equipment.It is being shown with touch sensible and various movements of fingerprint inducing function or portable In equipment, fingerprint sensor be often with the equipment that separates of display screen, or be arranged in outside display screen area with display On the identical surface of screen, such as in some models of apple iPhone and Samsung smart phone, or it is arranged in smart phone The back side, such as Huawei, association, millet or Google smart phone some models in, be used on front to avoid occupying Place the expensive real estate of big display screen.These fingerprint sensors be with the equipment that separates of display screen, thus need it is very compact with Space is saved for display and other function, while also providing and utilizing the spatial image resolution for being higher than certain acceptable level Reliable and quick fingerprint induction.However, in many fingerprint sensors, compact and small-sized demand and offer capture fingerprint image The high spatial image resolution ratio demand of case conflicts directly with one another, this is because being based on various suitable fingerprint induction technology (examples Such as, capacitance touch induction or optical imagery) capture fingerprint pattern when high spatial image resolution ratio need that there are a large amount of inductions The large sensor region of pixel.

The example of the sensor technology described in the patent document and realization sensor technology provides a kind of optics biography Sensor module, the optical sensor module at least partly use the light from display screen aobvious to irradiate as illumination detection light Fingerprint induction region in the touching sensing surface of display screen curtain, to execute one or more senses based on the optical sensor of this light It should operate.One display screen appropriate for realizing disclosed optical sensor technology can be based on various display technologies Or configuration, including the display screen with light emitting display pixels without using backlight, wherein each individually pixel generates light, For forming display image on the screen, for example, it is liquid crystal display (liquid crystal display, LCD) screen, organic Light emitting diode (organic light emitting diode, OLED) display screen or electroluminescence display screen.

In the open example that optical sensor is integrated into LCD based on disclosed optical sensor technology, LCD under screen Optical sensor can be used to detect a part for showing the light of image in LCD screen, wherein for showing screen This part light can be scattering light, reflected light or some stray lights.For example, in some implementations, the LCD screen based on backlight The image light of curtain can be used as return when encountering user's finger or palm or as objects such as the user pointer equipment of stylus Light is reflected or is scattered back in LCD display screen.The light of this return can be captured, to use disclosed optical sensor skill Art operates to execute one or more optical sensors.Due to using the light from LCD display screen to carry out optical sensor, so base It can be specifically designed to show as under type is integrated into LCD in the optical sensor module of disclosed optical sensor technology Screen: optical sensor operations and functions are provided with enhance electronic equipment or system (for example, smart phone, tablet computer or movement/ Wearable device) allomeric function, integration of equipments and display operation and function that LCD display screen is kept while user experience Without interfering.

In addition, can provide what one or more was specified in the various implementations of disclosed optical sensor technology Probe source detects light with the additional illumination that the optical sensor generated for being carried out by optical sensor module under LCD screen operates. In such an application, the backlight from LCD screen and the detection light from one or more specified probe sources are collectively formed Illumination light for optical sensor operation.

About the additional optical sensor function in addition to fingerprint detection, optical sensor can be used for measuring other parameters. For example, disclosed optical sensor technology can measure the people of available large touching surface product on entire LCD display screen Palm pattern (on the contrary, some specified fingerprint sensors, as apple iPhone/iPad equipment home button in fingerprint Sensor has the outer fingerprint induction region of fairly small and specified screen, by height limitation in the size of induction region, It may be not suitable for incuding big pattern).For another example, disclosed optical sensor technology can be not only used for catching using optical sensor The pattern of finger associated with people or palm is obtained and detected, but also optical sensor or other induction mechanisms, example can be used Such as different light absorption behaviors of the blood in the case where Different lightwave is long, capture or detection is detected to pass through " live finger " testing mechanism Fingerprint or palm pattern whether the hand from living person, should " live finger " testing mechanism can with based on the fact that due to The natural mobile or movement (intentional or unintentional) of people, the finger of this people are usually mobile or stretching, extension, or when blood flows through When human body relevant to heartbeat, the finger of living person is usually to pulse.In one implementation, since heartbeat/blood flow changes, Optical sensor module can detecte the variation of the light of the return from finger or palm, so that detection is showing as finger or hand With the presence or absence of the heartbeat to live in the object of the palm.User authentication can be based on fingerprint/palm pattern optical sensor and to presence The combination that the front of living person determines enhances access control.For another example, optical sensor module may include inducing function, be used for base Glucose level or oxygen saturation are measured in the optical sensor of the light from finger or the return of palm.For another example, when people touches When LCD display screen, the variation of touch force can reflect in one or more ways, including fingerprint pattern deformation, finger and screen The variation of contact area between scene plot face, fingerprint ridge broaden or the dynamic change of blood flow.These and other variations can pass through It is measured based on the optical sensor of disclosed optical sensor technology, and can be used for calculating touch force.This touch force Induction can be used in adding more functions in addition to fingerprint induction for optical sensor module.

Relevant useful operation or controlling feature, disclosed optics in terms of for the touch sensible to LCD display screen Sensor technology can provide Trigger Function or additional based on one or more induction results from optical sensor module Function, to carry out certain operations relevant to the control of the touch sensible of LCD display screen.For example, the optical characteristics of finger skin (such as refractive index) is usually different from other cultures.Optical sensor module can be designed as selectively receiving and examining accordingly The light of return caused by the finger contacted as the surface with LCD display screen is surveyed, and the light of the return as caused by other objects is not It can be detected by optical sensor module.This object selectivity optical detection may be used to provide through the useful of touch sensible User's control, such as only could wake up smart phone or equipment via the touch of the finger of people or palm, and other objects The revival that will not cause equipment is touched, to carry out power-save operation and extend the use of battery.This operation can be by being based on The control of the output of optical sensor module is realized, to control the wake-up circuit operation of LCD display screen, wherein pass through pass It closes most of LCD pixels (and LCD backlight is also switched off) and is at " sleep " mode without shining, while beating in a flashing mode One or more lighting sources (such as LED) for optical sensor module under LCD panel are opened, with intermittent to screen surface It flashes to incude any touch of the finger of people or palm in ground.By this design, optical sensor module operates one Or multiple lighting sources, with generation " sleep " mode wakeup incude scintillation light so that optical sensor module be able to detect by The light of finger this return for waking up induction light caused by being touched on LCD display screen, and detected in response to front, it opens Or " wake-up " LCD backlight and LCD display screen.In some implementations, waking up induction light can be in the sightless spectrum of infrared ray In range, so user will not undergo the flashing of any visual light.It can control LCD display screen operation to eliminate to pass through The bias light of optical sensor for fingerprint incudes to provide improved fingerprint.For example, in one implementation, each display Scanning frame generates a frame fingerprint signal.Relevant fingerprint signal is shown to screen if generating two frames, wherein working as LCD display screen A frame fingerprint signal is generated when opening, and generates another frame fingerprint signal when LCD display screen is closed, then this two frames fingerprint is believed Number difference can be used for reducing surrounding bias light influence.In some implementations, frame speed is incuded by operation fingerprint Rate is the half of frame rate of display, can reduce the background noise in fingerprint induction.

Optical sensor module based on disclosed optical sensor technology may be coupled to the back of LCD display screen Face, without creating specified region in the surface side of LCD display screen, the region is in some smart phones, plate electricity Valuable equipment surface space can be occupied in the electronic equipments such as brain or wearable device.This aspect of disclosed technology can be with For providing certain advantages or benefit in equipment design and product are integrated or manufactured.

In some implementations, the optical sensor module based on disclosed optical sensor technology can be configured For non-invasive module, it is easily integrated to display screen, without changing the design of LCD display screen to provide The desired optical sensor functions such as fingerprint induction.On this point, the optical sensing based on disclosed optical sensor technology The design that device module can be designed independently of specific LCD display screen, this is because the following property of optical sensor module: The optical sensor of this optical sensor module is by detecting one or more lighting sources hair by optical sensor module Out and light that top surface from display area returns carries out, and disclosed optical sensor module is as optics under screen Sensor module is coupled to the back side of LCD display screen, the light of the return for receiving the top surface from display area, thus not Need the specific sensor port or induction region with display screen region disconnecting.Therefore, optical sensor module under this screen It can be used for combining with LCD display screen, to provide optical finger print induction and other sensors function on LCD display screen, Without the use of having the LCD display screen of the special designing for the hardware for being specially designed for providing this optical sensor.It is disclosed This aspect of optical sensor technology the various LCD in smart phone, tablet computer or other electronic equipments are shown Screen has the function of the enhancing of the optical sensor from disclosed optical sensor technology.

For example, the existing telephone component for the fingerprint sensor that does not provide separation designs, as certain apple iPhone or Samsung Galaxy smart phone, this existing mobile phone component design can not change touch inductive display screen curtain component and integrate such as Optical sensor module under screen as described herein, to provide fingerprint inducing function on increased screen.Because of disclosed light It learns induction and is not required to specified induction region to be separated or port, as certain apple iPhone/ Samsung Galaxy mobile phones have aobvious Show the preceding fingerprint sensor outside screen area, or as some smart phones of some models of Huawei, millet, Google or association exist The back side has specified rear fingerprint sensor, and the integrated of fingerprint induction is not needed to touch sense on screen disclosed herein Answer the change that the existing telephone component of layer and display layer designs or the progress of touch sensible display module is substantive.Based on institute in this document Disclosed optical sensor technology does not need external sensor port and external hardware button in the outside of equipment, and equipment needs add Add disclosed optical sensor module to carry out fingerprint induction.The optical sensor module and interlock circuit of addition are outside phone Under display screen in shell, and fingerprint induction can be easily carried out in the identical touching sensing surface for touching screen.

For another example, due to the above-mentioned property of the optical sensor module incuded for fingerprint, this optical sensor mould is integrated The smart phone of block can be updated with improved design, function and integration mechanism, the design without influencing LCD display screen Or the design or manufacture burden of LCD display screen are manufactured or aggravate, to be that device fabrication and improvement/upgrading mention in production life cycle For desired flexibility, while maintaining using optics in the smart phone of LCD display screen, tablet computer or other electronic equipments The availability of the more new version of fingerprint sensor.Specifically, touch sensitive layer can be updated when next product is issued or LCD is aobvious Show layer, without any significant hard to do using the fingerprint inductance characteristics of optical sensor module realization under disclosed screen Part changes.In addition, by using optical sensor module under the screen of new version, it is improved by this optical sensor module It can be by using optics under the screen of new version for optical sensor on the screen of fingerprint induction or other optical sensor functions Sensor module is added in new product version, is counted as significantly changing without the installing of opponent's unit, including increases additional Optical sensor function.

Above or other features of disclosed optical sensor technology may be implemented as the electronic equipment to a new generation The induction of improved fingerprint and other inducing functions are provided, especially for smart phone, tablet computer and other show with LCD The electronic equipment of screen, which provides various touch sensible operations and functions, and enhances the user's body of this equipment It tests.The feature of optical sensor module disclosed in patent document is applicable to based on including both LCD and OLED display Different technologies various display panels.Following specific example be directed to the LCD display panel that is placed under LCD display panel and Optical sensor module.

In the implementation of disclosed technical characteristic, it can provide the additional inducing function such as biomedical sensor Or induction module, such as the heartbeat sensor in the wearable device as wrist wearing devices or wrist-watch.In short, can be set in electronics Different sensors is provided in standby or system to realize different inductive operation and function.

Disclosed technology may be implemented as being supplied to the optical sensor for executing mankind's fingerprint and certification to verify to lock Equipment, system and the skill that the access of the equipment (such as mobile device or the system of computer control) of fixed computer control is attempted Art, the equipment, system and technology are equipped with finger print detecting module.Disclosed technology, which can be used for protecting, sets various electronics Standby and system access, the various electronic equipments and system include that portable or mobile calculates equipment (calculating such as on knee Machine, tablet computer, smart phone and game station) and other electronic equipments or system (such as electronic databank, automobile, silver Row ATM) etc..

Fig. 1 is the exemplary block diagram of the system 180 with the fingerprint induction module including fingerprint sensor 181, the system It may be implemented as including the optical fingerprint sensor based on the optical finger print induction disclosed in this document.System 180 includes Fingerprint sensor control circuit 184 and digital processing unit 186, which may include one or more processors, For handling fingerprint pattern, and determine input fingerprint pattern whether be authorized user fingerprint pattern.Fingerprint induction system 180 Obtain fingerprint using fingerprint sensor 181 and be compared obtained fingerprint with the fingerprint of storage, with enable or disable by The function in equipment or system 188 that fingerprint induction system 180 is protected.In operation, finger prints processing processor 186 is based on capture Whether user fingerprints come from authorized user, control the access to equipment 188.As shown, fingerprint sensor 181 may include more A fingerprint inducing pixel, such as at least part of pixel 182A-182E in unified representation fingerprint.For example, fingerprint induction system 180 can realize at the ATM as system 188, to determine the fingerprint of the client of the fund that requests access to or other transaction.It is based on To the fingerprint from the user that fingerprint sensor 181 obtains compared with the fingerprint of one or more storage, identified in response to front, Fingerprint induction system 180 can make ATM system 188 permit the access to user account of request, or know in response to negative It not, can be with denied access.For another example, equipment or system 188 can be smart phone or portable device, and fingerprint induction system 180 are integrated into the module of equipment 188.For another example, equipment or system 188, which can be using fingerprint sensor 181, permits or refuses The door or safety entrance of the facility or family that enter absolutely.For another example, equipment or system 188 can be automobile or other vehicles, Its starting that engine is linked to using fingerprint sensor 181, and identify whether people is authorized to and operate the automobile or the vehicles.

As specific example, Fig. 2A and 2B show an exemplary realization of electronic equipment 200, the electronic equipment 200 have touch inductive display screen curtain component and the optical sensor module below the touch inductive display screen curtain component. In the specific example, display technology can carry out the LCD display screen of optical illumination LCD pixel by using backlight, or Pass through another display screen (for example, OLED display screen) Lai Shixian with light emitting display pixels without the use of backlight.Electricity Sub- equipment 200 can be the portable devices such as smart phone or tablet computer, and electronic equipment 200 can be as shown in Figure 1 Equipment 188.

Fig. 2A shows the front side of equipment 200, some spies being similar in some existing smart phones or tablet computer Sign.Device screen occupies the whole of front space, major part or signal portion in the front side of equipment 200, and in device screen Upper offer fingerprint inducing function, such as receiving one or more induction regions of finger on device screen.As an example, figure 2A shows the fingerprint induction region touched in device screen for finger, which can be lit for obviously may be used The area or region of identification, user place finger to carry out fingerprint induction.This fingerprint induction region can be as device screen Rest part is equally used to show image.As shown, in various implementations, the device housings of equipment 200 can have side, Support side control button common in various smart phones on Vehicles Collected from Market in the side.Also, such as device housings in Fig. 2A Shown in one example in the upper left corner, one or more optional biographies can be set on the front side of the equipment 200 outside device screen Sensor.

Fig. 2 B shows the structure construction for incuding relevant module in equipment 200 to optical finger print disclosed in this document Example.Device screen component shown in Fig. 2 B includes: for example, having the touch-sensitive screen mould of touch sensitive layer at top Block and the display screen module with display layer under touch sensible module.Optical sensor module is coupled to display Screen assembly module is simultaneously disposed below, to receive and capture the light of the return of the top surface from touch-sensitive screen module, and And the light of the return is guided and is imaged on the optic sensor array of optical sensor pixel or photoelectric detector, which passes Optical imagery in the light of the return is converted into picture element signal with for further processing by sensor array.Optical sensor module Under be equipment electronic structure, which includes for the optical sensor module and other component in equipment 200 Certain electronic circuits.The device electronics can be arranged in inside device housings, and may include as shown in Figure 2 B A part below optical sensor module.

In some implementations, the top surface of device screen component can be the surface of transparent optical layer, the optical clear Layer surface provides multiple functions as user's touching sensing surface, such as (1) shows output surface, carries the light of display image The eyes of viewer are reached across the display output surface, (2) touch sensing interface receives the touch for being used for touch sensible module The user of inductive operation touches, and (3) optical interface, for fingerprint induction on screen (and it is possible it is one or more its His optical sensor function).This transparent optical layer can be rigid layers or the flexible layers such as glass or crystal layer.

Show screen another example is with LCD layer and thin film transistor (TFT) (thin film transistor, TFT) knot The LCD display of structure or substrate.LCD display panel is multilayer liquid crystal display (liquid crystal display, LCD) mould Block, including emitting the LCD display back light (for example, LED light) of the LCD illumination light for LCD pixel, for guiding backlight The light waveguide-layer of lamp and may include such as liquid crystal (liquid crystal, LC) elementary layer, LCD electrode, electrically conducting transparent ITO The LCD structure layer of layer, optical polarizator layer, color-filter layer and touch sensitive layer.LCD module further includes being located under LCD structure layer Backlight diffuser device above side and light waveguide-layer spreads backlight with space to illuminate LCD display pixel, and is located at light waveguide-layer Back light is recycled to LCD structure layer to improve efficiency of light and display brightness by following optical reflection film layer.

B referring to fig. 2, the optical sensor module in this example are located at below LCD display panel, come from the top with capture The light of the return of portion's touching sensing surface, and obtain the fingerprint when the induction region on the finger of user and the top surface contacts The high-definition picture of pattern.In other implementations, optical sensor module can under the disclosed screen for fingerprint induction To be realized in the equipment of no touch sensible feature.In addition, suitable display panel can have different from OLED display Various screen designs.

Fig. 3 A and 3B show the example for realizing the equipment of the optical sensor module in Fig. 2A and 2B.Fig. 3 A shows packet Viewgraph of cross-section containing a part of the equipment of optical sensor module under screen.Fig. 3 B is shown in left side with touch sensible The view of the front side of the equipment of display indicates the fingerprint induction region on display screen lower part, and shows packet on right side The perspective view of a part of the equipment containing the optical sensor module being located at below device display screen curtain component.Fig. 3 B is also shown The example of the layout of flexible-belt with circuit element.

In the design example of Fig. 2A, 2B, 3A and 3B, optical fingerprint sensor design is different from some other fingerprints and passes Sensor design, these designs are shown using the fingerprint sensor structure independently of display screen, and on the surface of mobile device Have physical interface (for example, opening in top glass cover board in the design of some mobile phones between display screen curtain and fingerprint sensor Button-like structure in mouthful).In design shown in this article, for detecting the optical finger print of fingerprint induction and other optical signallings Sensor is located at below top blind flange glass or layer (such as Fig. 3 A), so that the top surface of cover-plate glass is used as the top of mobile device Face, as the continuous and uniform glass across vertical stacking and vertically superposed display screen layer and fluorescence detector sensor Surface.For optical finger print to be incuded and this is set to what the display screen of touch-sensitive was integrated under common and uniform surface Meter provides benefit, including improves equipment integration, enhances equipment packages, enhances equipment to outer member, failure, mill The resistance of damage and tearing, and enhance the user experience during the ownership of equipment.

Referring back to Fig. 2A and 2B, shown in can be with for optical sensor module under the screen of fingerprint induction on screen Various configurations are to realize.

In one implementation, the equipment based on above-mentioned design may be constructed such that including device screen, the equipment screen Curtain provides touch sensible operation and including having a LCD display panel structure, is used to form display image, which also wraps Include top clear, be formed on device screen, as the user's touch interface operated for touch sensible and as with Image is shown to the interface of user in light of the transmission from display structure, which further includes optical sensor module, position In the lower section of display panel structure, fingerprint is detected to receive the light returned from the top clear.

Equipment and other equipment disclosed in this document can be further configured to include various features.

For example, equipment electronic control module may include in the device, in the fingerprint and authorized user detected Access of the authorized user to equipment when fingerprint matching.In addition, optical sensor module is in addition to for being also used to other than detecting fingerprint Be different from the biochemical characterization parameter of fingerprint by optical sensor detection, with indicate at top clear with the fingerprint phase that detects Whether associated touch comes from living person, if the fingerprint matching of fingerprint and authorized user that (1) detects, and (2) detect The biochemical characterization parameter fingerprint that detects of instruction from living person, then equipment electronic control module is for authorized user to the equipment Access.The biochemical characterization parameter may include, for example, finger whether include people blood flow or heartbeat.

For example, the equipment may include the equipment electronic control module for being coupled to display panel structure, with to luminescence display Pixel provides power supply, and the image for controlling the display panel structure is shown, and in fingerprint inductive operation, and mould is controlled electronically in equipment Block operates the light emitting display pixels closed in a frame and opens the light emitting display pixels in next frame, to allow optical sensor battle array Column capture has light emitting display pixels illumination and two fingerprint images without light emitting display pixels illumination, to reduce fingerprint sense Answer the influence of middle bias light.

For another example, equipment electronic control module may be coupled to display panel structure, to provide power supply to LCD display panel, And the backlight electric power of LCD display panel is closed in a sleep mode, and when optical sensor module is in the finger of top clear Detected at fixed fingerprint induction region the skin of people there are when, equipment electronic control module can be used for display surface is hardened Structure is from sleep mode wakeup.More specifically, in some implementations, equipment electronic control module can be used for operating the optical sensing One or more lighting sources in device module intermittently shine, and close LCD display panel (in a sleep mode) simultaneously Power supply, by interval issue light be directed toward top clear specified fingerprint induction region, with monitor whether exist with it is specified The skin of the people of fingerprint induction region contact, for by equipment from sleep mode wakeup.

For another example, which may include equipment electronic control module, which is coupled to optical sensing Device module, to receive the information of multiple fingerprints detected of the touch acquisition by finger sensing, and the equipment electronics control Molding block is operated to measure the variation of multiple fingerprint detected and determines the touch force for the variation for causing to measure.Example Such as, which may include the change of the variation of the fingerprint image due to caused by touch force, the touch area due to caused by touch force The variation of the spacing of change or fingerprint ridge.

For another example, top clear may include being touched for user with finger to carry out the specified fingerprint sense of fingerprint induction Answer region, and the optical sensor module below display panel structure may include contacted with panel substrate it is transparent Block, to receive light issuing from the display panel structure and from top clear return, which may be used also To include the optic sensor array and optical imagery module for receiving the light, which will receive in the transparent block To the light be imaged on the optic sensor array.The optical sensor module can be relative to specified fingerprint induction region Setting, and be configured to: when the skin contact with people, at the top surface of top clear selectively by total internal reflection The light returned is received, and in the contact of the skin of nobody, the light of the return from specified fingerprint induction region is not received.

For another example, optical sensor module can be configurable to include the wedge below display panel structure, with modification Total reflection condition on the bottom surface of the display panel structure engaged with the wedge is worn to allow to extract from the display panel structure The light of the bottom surface is crossed, which can also include optic sensor array, receive aobvious from this from the wedge Show the light that panel construction extracts, can also include optical imagery module, between the wedge and the optic sensor array, The light from the wedge to be imaged on the optic sensor array.

The specific example of optical sensor module under the screen that fingerprint incudes on screen is provided below.

Fig. 4 A and Fig. 4 B show light for realizing the design in Fig. 2A and Fig. 2 B, below display screen assembly Learn the example of an implementation of sensor module.Equipment in Fig. 4 A-4B includes having the display group of top clear 431 Part 423, the top clear 431 are formed on device screen component 432, are touched as the user operated for touch sensible Interface and as being used for transmission the light from display structure so that image to be shown to the interface of user.In some implementations In, which can be cover-plate glass or crystalline material.Device screen component 423 may include top clear LCD display module 433 below 431.LCD display layer allow partial optical transmit, allow the light from top surface partly Optical sensor module under LCD screen is reached across LCD display layer.For example, LCD layer includes optically being used as hole and light scattering The electrode and wire structures of the array of body.Circuitry module 435 can be set below the LCD display panel, with control The operation of the equipment, and function is executed for user to operate the equipment.

The optical sensor module 702 in this specific implementation example is located under LCD display module 433.One or Multiple lighting sources 703 are provided for optical sensor module 702, and may be controlled to be shone at least partly The fingerprint induction region 615 in the top clear 431 in device screen region is illuminated across LCD display module 433, for making User places finger wherein and carries out fingerprint recognition.Illumination light from one or more lighting sources 703 can be directed to Fingerprint induction region 615 on top surface, as such illumination light comes from illuminating fingerprint region 613.As shown, finger 445 It is placed in the fingerprint induction region 615 illuminated, the fingerprint induction region 615 is as the actual induction area for fingerprint induction Domain.LCD is pointed to by a part in the light of reflection or scattering in area 615 that LCD pixel illuminates in illuminating fingerprint region 613 Photoelectric detector induction arrays in optical sensor module under display module 433, and in optical sensor module receive This light, and capture the fingerprint pattern information as entrained by the received light.

In this type of design, illumination light is provided for optical finger print induction using one or more lighting sources 703, one In a little implementations, it can control each lighting source 703 and opened with lower periodic intermittent, be used for optics sense to reduce The optical power that should be operated.In some implementations, which can be realized with the process of two steps: firstly, One or more lighting sources 703 are opened in a flashing mode, and are not turned on LCD display panel, to use flash of light to carry out finger sensing Whether touching induction region 615, and once detect the touch in area 615, operate optical sensor module to carry out based on light The fingerprint induction of induction is learned, and LCD display panel can be opened.

In the example of Fig. 4 B, optical sensor module includes the transparent block 701 for being coupled to the display panel under screen, should Transparent block 701 receives the light of the return of the top surface from apparatus assembly, and optical sensor module further includes executing light under the screen Study the optical imagery block 702 of picture and imaging capture.Light from lighting source 703 after reaching coversheet top surface, for example, with The coversheet top surface at induction region 615 that family finger touches reflects or is scattered back to come from the coversheet top surface.Work as induction region When coversheet top surface in 615 is in close contact fingerprint ridge, due to the presence of the skin or tissue of the finger contacted at this location, Light reflection under fingerprint ridge is different from the light reflection under the fingerprint valley of another position, does not have under the fingerprint valley of the another position The skin or tissue of finger.Light conditioned reflex at the position of region median ridge and paddy that finger on the coversheet top surface touches This to be differently formed image, which indicates the image or spatial distribution by the ridge of touch part and paddy of the finger.This is anti- It penetrates light and is pointed to return LCD display module 433, and after the aperture for passing through LCD display module 433, reach the optical sensing The interface of the low index optical transparent block 701 of device module.The refractive index of the low index optical transparent block 701 is configured to be less than The refractive index of LCD display panel allows to from LCD display panel extract the light of return in the optical clear block 701.One The light of the denier return is received in the optical clear block 701, and this light received enters one as imaging sensor block 702 Partial optical image unit, and on the photoelectric detector induction arrays or optical sensor array being imaged onto block 702.Refer to Light reflection difference between wrinkle ridge and paddy is different to cause the comparison of fingerprint image.It is (such as the micro-control of control circuit 704 shown in Fig. 4 B Device or MCU processed), it is coupled to other circuits such as the equipment primary processor 705 on imaging sensor block 702 and main circuit board.

In the specific example, optical beam path design is: light is total on the top surface between substrate and Air Interface Enter coversheet top surface in angle of reflection, and by block 702 image forming optics and imaging sensor array most effectively receive Collection.In this type of design, maximum comparison is presented in the image in fingerprint ridge valley region.This imaging system may have can be to finger Line incudes the undesirable optical distortion adversely affected.Therefore, at based on optic sensor array, along the light of return projector The optical distortion situation on road, when the output signal of the optic sensor array in process block 702, the image of acquisition can also be It is corrected during imaging reconstruction by distortion correction.By the entire induction region in X-direction line and Y-direction line, scan every time The test image pattern of one-row pixels, the pattern generation that distortion correction coefficient can be captured by each photo-detector pixel. This correction course can also use from one individual pixel of each tuning and scan the entire of photodetector array The image that image-region generates.This correction coefficient only needs to generate after assembling sensor primary.

Bias light (such as sunlight or room light) from environment can pass through LCD by the hole in LCD display component 433 Panel top surface enters imaging sensor.This bias light can generate background baseline in the valuable image from finger, And this background baseline is undesirable.Different methods can be used to reduce this baseline intensity.Another example is with Certain frequency f tuning switches on and off illuminating fingerprint light source 703, by lamp drive pulses and the progress of imaging sensor frame Phase synchronization, imaging sensor are able to identical frequency and obtain the image received.Under this operation, in the image of out of phase Only one includes the light emitted from light source.By subtracting odd and even number frame, it is likely to be obtained most of illumination light by modulating Image composed by the light of source transmitting.Based on the design, each display scanning frame generates the frame of fingerprint signal.If by one Illumination light and the tuning disconnection illumination light in another frame are connected in tuning in frame, subtract two continuous signal frames, then can be by ring The bias light in border is influenced to minimize or largely be eliminated.In some implementations, fingerprint induction frame rate can be display frame speed The half of rate.

A part in the light in lighting source 703 may also pass through cover board top surface, and enter finger tissue.This portion Point optical power be scattered in around, and a part of in the scattering light can be finally by the imaging in optical sensor module Sensor array is collected.The luminous intensity of the scattering light depends on the haemoconcentration in the colour of skin and finger tissue of finger, and hand This information that the scattering light on finger carries is useful to fingerprint induction, and can be used as one of fingerprint inductive operation Divide and is detected.For example, by integrate user's finger image region intensity, may it will be observed that haemoconcentration increasing plus/minus The phase of user's heartbeat is depended on less.This feature is determined for the HR Heart Rate of user, determines that the finger of user is living Body finger still has the deception device of the fingerprint pattern of forgery.

One or more lighting sources 703 in Fig. 4 B can be designed as the light of transmitting different colours or wavelength, and Optical sensor module can capture the different colours of the finger from people or the return light of wavelength.By in different colors or wave The corresponding measurement intensity of long record return light, can determine information relevant to the colour of skin of user.For example, when user's registration is used When the finger of finger print identifying operation, optical fingerprint sensor also measures the intensity of the scattering light of color A and B from finger, As intensity Ia and Ib.Can recorde the ratio of Ia/Ib, with fingerprint is measured when the finger of user is placed on induction region More late measurement result is made comparisons.This method can help to refuse may be with the unmatched deception device of user colour.

The one or more lighting source 703 can be by for the identical of the image sensor array in control block 702 Electronic device 704 (such as MCU) control.The one or more lighting source 703 can with the pulse in short time of low duty ratio, with It intermittently shines and the pulsed light for image sensing is provided.Image sensor array can be operating as with identical pulse Duty ratio monitors light pattern.If there is the human finger for touching the induction region 615 on screen, the then imaging in block 702 Captured image can be used for detecting touch event at induction arrays.It is connected to the control of the image sensor array in block 702 Electronic device or MCU 704 can be operating as determining whether the touch is human finger's touch.If it is determined that being human finger Touch event, MCU 704 can be operating as waking up intelligent mobile phone system, open lighting source 703 for executing optical finger print Induction, and complete fingerprint image is obtained using normal mode.Image sensor array in block 702 can be to the main place of smart phone It manages device 705 and sends the fingerprint image obtained, which can be operating as the fingerprint image that will be captured As being matched with the fingerprint database of registration.If there is matched, smart phone can unlock mobile phone, and start normal behaviour Make.If the image obtained is not matched, smart phone can be to the user feedback authentification failure.User can taste again Examination, or input password.

In the example of Fig. 4 A and Fig. 4 B, optical sensor module using optical clear block 701 and has photoelectricity under screen The imaging sensor block 702 of detector induction arrays, by the fingerprint pattern optics of the touch finger contacted with the top surface of display screen Ground is imaged on photoelectric detector induction arrays.Photodetector array is shown from induction region 615 into block 702 in Fig. 4 B Optical imagery axis or detection axis 625.Imaging sensor block 702 before optical clear block 701 and photoelectric detector induction arrays Front end form body image-forming module, with realize for optical finger print induction suitable imaging.Due in the imaging process Optical distortion, as explained on, distortion correction can be used to implement desired imaging operation.

It is disclosed herein by the screen in Fig. 4 A-4B under optical sensor module and other design carry out optical sensor In, the optical signalling from induction region 615 to optical sensor module under screen in top clear 431 includes different light Component.The signal that Fig. 5 A, 5B and 5C show the light for returning under different optical conditions from induction region 615 generates, with It is easy to understand the operation of optical sensor module under screen.

It is how aobvious through OLED after passing through top clear 431 that Fig. 5 A shows the illumination light from lighting source 703 Show that module 433 is propagated, and be generated to the different return optical signals of optical sensor module under screen, which includes Carry the optical signal of fingerprint pattern information.For the sake of simplicity, two illuminating rays 80 and 82 at two different locations are directed toward Top clear 431, and total reflection is not suffered from the interface of top clear 431.Specifically, illuminating ray 80,82 is vertical In or be approximately perpendicular to top layer 431.Finger 60 is contacted with the induction region 615 in top clear 431.As shown, illumination Light beam 80 reaches the finger ridge contacted with top clear 431 after passing through top clear 431, with raw in finger tissue At light beam 183 and another light beam 181 returned to LCD display module 433.Illuminating bundle 82 pass through top clear 431 after, The finger paddy for being located at the top of top clear 431 is reached, to generate from the interface of top clear 431 to LCD display module 433 The light beam 185 of return, the second light beam 189 into finger tissue and the third light beam 187 by finger paddy reflection.

In the example of Fig. 5 A, it is assumed that equivalent refractive index of the finger skin at 550nm is about 1.44, and top transparent The cover-plate glass refractive index of layer 431 is about 1.51.The part light of finger ridge-cover-plate glass interface the reflected beams 80, as arriving The light 181 of the reflection of bottom 524 under LCD display module 433.Reflectivity may be very low in some LCD panel, e.g., about 0.1%.Most of light in light beam 80 becomes the light beam 183 being transmitted in finger tissue 60, and finger tissue 60 causes light 183 Scattering generates the scattering light 191 returned to LCD display module 433 and bottom 524.Transmitted light beam 189 from LCD pixel 73 Scattering in finger tissue also contributes the scattering light 191 of return.

Light beam 82 at finger skin paddy position 63 is reflected for example, about 3.5% incident laser energy by cover-plate glass surface (as reflected light 185) arrives bottom 524, and about 3.3% (light 187) of finger paddy surface reflection incident laser energy is to bottom 524.Total reflectivity is about 6.8%.Most of light 189 is transferred in finger tissue 60.In transmitted light 189 in finger tissue Optical power in a part scattered by finger tissue, contribute to toward and into the scattering light 191 in bottom 524.

Therefore, the light reflection from various interfaces or surface at the finger paddy and finger ridge for touching finger is different , reflectivity difference carries fingerprint cartographic information, and can measure the reflectivity difference contacted with top clear 431 with to extract and The fingerprint pattern for the part being irradiated to by oled light.

Fig. 5 B and 5C are shown at different conditions and relative to the top surface at the paddy of finger or the different location of ridge The light path of the illuminating ray of two kinds of addition types at place, including the total reflection condition in the interface with top clear 431. The illuminating ray of diagram generates different return optical signals, including fingerprint pattern information is carried to optical sensor mould under screen The optical signal of block.Assuming that cover-plate glass 431 and LCD display module 433 are bonded together, between the two without any air gap, So that with cover-plate glass 431 there is the illumination light of big incidence angle can be totally reflected at cover-plate glass-Air Interface.Fig. 5 A, 5B The example of three groups of divergent beams: (1) central light beam 82 is shown with 5C, there is small incidence angle to cover-plate glass 431 and is not had It is totally reflected (Fig. 5 A), (2) high contrast light beam 201,202,211 and 212 is being covered when cover-plate glass surface is not touched Be totally reflected at glass sheet 431, and when finger touch cover-plate glass 431 when, may be coupled in finger tissue (Fig. 5 B and 5C), and (3) there is very big incidence angle to flee from light beam, even if at the position that finger tissue touches, also in cover-plate glass It is totally reflected at 431.

For central light beam 82, light of the cover-plate glass surface against the reflection of light beam 185 about 0.1%~3.5%, this part Light is transferred in bottom 524, and the light that finger skin is about 0.1%~3.3% to the reflection of light beam 187, this part light is also passed It is defeated into bottom 524.Difference in reflection depends on whether light beam 82 meets with finger skin ridge 61 or paddy 63.Remaining 189 quilt of light beam It is coupled to and refers in tissue 60.

For high contrast light beam 201 and 202, if cover-plate glass surface is not touched, cover-plate glass surface difference Almost 100% light is reflected light beam 205 and 206.When finger skin ridge touches cover board glass at the position of light beam 201 and 202 When glass surface, the major part in optical power is coupled in finger tissue 60 by light beam 203 and 204.

For high contrast light beam 211 and 212, if cover-plate glass surface is not touched, cover-plate glass surface difference Almost 100% light is reflected light beam 213 and 214.When finger touches cover-plate glass surface and finger skin paddy just at light When the position of beam 211 and 212, without Coupling power into finger tissue 60.

As shown in Figure 5A, random scatter can be occurred via finger tissue by being coupled to the light beam in finger tissue 60, to be formed Low contrast light 191, and a part in this low contrast light 191 passes through LCD display module 433 and reaches optical sensing Device module.

Therefore, in the region of high comparison light beam irradiation, finger skin ridge and paddy cause different optical reflections, and anti- It penetrates difference pattern and carries fingerprint pattern information.Height comparison fingerprint signal can be realized by comparing this species diversity.

Based on the design in Fig. 2A and 2B, optical sensor technology can be come optically under disclosed screen with various configurations Capture fingerprint.

For example, can realize the specific implementation in Fig. 4 B with various configurations, which is based upon using optics sense Answer the optical imagery of the bulk image-forming module in module.Fig. 6 A-6C, 7,8A-8B, 9,10A-10B, 11 and 12 are shown for light Learn the various realizations that optical sensor module designs under the screen of fingerprint induction, the example of supplementary features and operation.

Fig. 6 A, 6B and 6C are shown and are shown based on optical sensor module under the screen for carrying out optical imagery by lens Example, for capturing fingerprint from the finger 445 of pressing display cover-plate glass 423.Fig. 6 C is optical sensor module shown in Fig. 6 B Partial enlarged view.Optical sensor module is located under LCD display module 433 under screen as shown in Figure 6B, under the screen Optical sensor module includes the optical clear gasket 617 engaged with the bottom surface of LCD display module 433, comes from top to receive The light that induction region 615 on hyaline layer on 431 top surface returns, optical sensor module further includes being located at gasket under the screen Imaging len 621 between 617 and photodetector array 623, imaging len 621 will be received from induction region 615 The light of return be imaged on photodetector array 623.Similar to the imaging system in Fig. 4 B example, optics is used in Fig. 6 B The imaging system of sensor module may undergo image fault, and it is this to reduce that suitable optical correction calibration can be used Distortion, for example, to aberration emendation method described in system in Fig. 4 B.

It is similar to the hypothesis in Fig. 5 A, 5B and 5C, it is assumed that equivalent refractive index of the finger skin at 550nm is about 1.44, And for cover-plate glass 423, the refractive index of naked cover-plate glass is about 1.51.When OLED display module 433 is bonded in cover board When on glass 431 and without any air gap, total internal reflection occurs in the wide-angle for being equal to or more than the critical angle of incidence at interface.Such as Fruit cover-plate glass top surface is not contacted, then being totally reflected incidence angle is about 41.8 °, and if finger skin touches cover-plate glass Top surface, then the angle of total reflection is about 73.7 °.Corresponding total reflection angular difference is about 31.9 °.

In this type of design, lenticule 621 and photodiode array 623 define contacts in capture induction region 615 The view angle theta of the image of finger.In order to detect the desired part in 615 cover plate glass surface of induction region, control can be passed through Physical parameter processed or configuration are to be appropriately aligned the visual angle.For example, can be with alignment angle to detect the complete interior anti-of LCD display component It penetrates.Specifically, viewing visual angle θ is directed to incude the actual induction region 615 in cover-plate glass surface.Effective induction cover board glass Glass surface 615 can be considered as mirror, so that the illuminating fingerprint region in LCD display is effectively detected in photodetector array 613 and the image on photodetector array is projected by induction cover-plate glass surface 615.Photodiode/photodetector Array 623 can receive the image in the region 613 reflected by induction cover-plate glass surface 615.When finger touching induction region 615 When, a part in light may be coupled to the chi chung of fingerprint, this can cause photodetector array to receive the light from ridge position, To be rendered as darker fingerprint image.Since the geometry in optical detection path is known, it is possible to which correction is in light Learn caused fingerprint image distortion in the optical path in sensor module.

As specific example, it is contemplated that the distance H in Fig. 6 B from detection module central axis to cover-plate glass top surface is 2mm.This design can directly cover the actual induction region 615 of 5mm, which has on cover-plate glass There is width Wc.The adjustable detector location parameter H of thickness of gasket 617 is adjusted, and it is wide to optimize actual induction region Spend Wc.Since H includes the thickness of cover-plate glass 431 and display module 433, so this application design is contemplated that these layers.Pad Piece 617, lenticule 621 and photodiode array 623 can integrate the coloured coating on the bottom surface of top clear 431 619 lower section.

Another design that Fig. 7 shows the optical imaging designs for optical sensor module shown in Fig. 6 A-6C is examined The example of worry, the gasket 617 in Fig. 6 B-6C replaced by using special gasket 618, to increase the ruler of induction region 615 It is very little.Gasket 618 is configured to have width Ws, with a thickness of Hs, has low-refraction (refraction index, RI) ns, and And gasket 618 is located under LCD display module 433, for example, the attached bottom surface for arriving LCD display module 433 (as bonded).Gasket 618 end face is the angled or inclined face engaged with lenticule 621.This relative position of gasket and lens is different from Lens are located at the lower section of gasket 617 in Fig. 6 B-6C.Lenticule 621 and photodiode array 623, which are assembled into, has detection angle It spends in the optical detecting module that size is θ.Due to the interface between gasket 618 and display module 433 light refraction with And the light refraction of the interface between cover-plate glass 431 and air, detection axis 625 are bent.Local incidence angle φ 1 and φ 2 It is to be determined by the refractive index (refractive indices, RIs) of component materials, ns, nc and na.

If nc is greater than ns, φ 1 is greater than φ 2.Refraction is exaggerated induction width Wc as a result,.For example, it is assumed that finger skin Equivalent refractive index RI be about 1.44 at 550nm, and the refractive index RI of cover-plate glass is about 1.51, if cover-plate glass top Face is not touched, then being totally reflected incident angular estimation is about 41.8 °, if finger skin touches cover-plate glass top surface, is all-trans Firing angle is about 73.7 °.Corresponding total reflection angular difference is about 31.9 °.If gasket 618 is by material system identical with cover-plate glass At then the distance from detection module center to cover-plate glass top surface is 2mm, if detection angle is θ=31.9 °, actual induction Peak width Wc is about 5mm.The local incidence angle of corresponding central axis is φ 1=φ 2=57.75 °.If special gasket 618 Material have about 1.4 refractive index ns and Hs be 1.2mm, then detection module tilts at φ 1=70 °.Actual induction area Field width degree is added to greater than 6.5mm.Under these parameters, the detection angular breadth in cover-plate glass is lowered to 19 °.Therefore, The imaging system of optical sensor module can be designed as the size of the induction region 615 on expectation enlarged top portion hyaline layer 431.

When the refractive index of special gasket 618 be designed as it is sufficiently low (e.g., using MgF₂、CaF₂Or even air pads to be formed Piece) when, the width Wc in actual induction region 615 is no longer limited by the thickness of cover-plate glass 431 and display module 433.This property Matter provides desired design flexibility.In principle, if detection module has enough resolution ratio, it might even be possible to by effective feeling Region is answered to increase to the entire display screen of covering.

Because disclosed optical sensor technology may be used to provide big induction region to capture pattern, institute is public Optical sensor module can be not only used for capturing and detecting the pattern of finger under the screen opened, and can be also used for capturing and detect Larger sized pattern, such as the palm of people associated with people, Lai Jinhang user authentication.

Fig. 8 A-8B shows another design of the optical imaging designs for optical sensor module shown in Fig. 7 Example, in this design, setting photodetector array 621 He of detection angle θ ' and lens opposite in display screen surface The distance between gasket 618 L.Fig. 8 A shows the viewgraph of cross-section along the direction perpendicular to display screen surface, and Fig. 8 B shows The view for the equipment seen from display bottom of screen or top is gone out.Packing material 618c can be used for filling lens 621 and light Interval between photodetector array 623.For example, packing material 618c can be material identical with special gasket 618 or It is another different material.In some designs, packing material 618c can be airspace.

Fig. 9 shows another example of optical sensor module under the screen in the design based on Fig. 7, one of them or it is more A lighting source 61 is arranged to illuminate top surface induction region 615 for optical finger print induction.Lighting source 614 can be Expansion type or the light source for collimating type, so that point all in actual induction region 615 is illuminated.Lighting source 614 It can be unit piece light source or array of source.

Figure 10 A-10B shows optical sensor module under the screen using the optical coupler 628 that shape is thin wedge Example, to improve the optical detection at optic sensor array 623.Figure 10 A is shown with the screen for fingerprint induction The cross section of the device structure of lower optical sensor module, Figure 10 B show the top view of device screen.Wedge 628 (has folding Penetrate rate ns) it is located at the lower section of display panel structure, being all-trans on the bottom surface to modify the display panel structure engaged with wedge 628 Condition is penetrated, to allow to extract the light across bottom surface from display panel structure.Optic sensor array 623, which receives, comes from wedge The light that 628 slave display panel structure extracts, optical imagery module 621 be located at wedge 628 and optic sensor array 623 it Between, the light from wedge 628 is imaged on optic sensor array 623.In the example shown, wedge 628 includes face Against the oblique light wedge surface of optical imagery module and optical sensor array 623.Also, as shown, wedge 628 and optics at It is freely spaced as existing between module 621.

If light is totally reflected at the sensitive surface of cover-plate glass 431, reflectivity 100% has highest effect Rate.However, light can be also totally reflected at the 433b of the bottom surface LCD if light is parallel with cover-plate glass surface.Wedge-shaped coupler 628 for modifying local surfaces angle, so that light can couple output for the detection at optic sensor array 623. Micropore in LCD display module 433 provides so that light passes through LCD display module 433 to carry out the expectation of optical sensor under screen Propagation path of light.If light transmission angle becomes too big or when TFT layer becomes too thick, actual light transmission efficiencies may be gradually It reduces.When the angle is close to the angle of total reflection, i.e., about 41.8 °, and when cover-plate glass refractive index is 1.5, fingerprint image is seen It is good for getting up.Therefore, the angle of wedge of wedge-shaped coupler 628 can be adjusted to several times so that detection efficiency can be improved or Optimization.If selecting the refractive index of higher cover-plate glass, the angle of total reflection becomes smaller.For example, if cover-plate glass is by refractive index About 1.76 sapphire is made, then the angle of total reflection is about 34.62 °.Detection light transmission efficiencies in display also improve.Cause This, this design will test angle using thin wedge and be set above the angle of total reflection, and/or the cover-plate glass material using high refractive index Material, Lai Tigao detection efficiency.

Under screen of Fig. 6 A into 10B in optical sensor module, the induction region 615 on top transparent surface is not Detection axis 625 that is vertical or being not orthogonal to optical sensor module, so that the plane of delineation of induction region is also not vertical Or be not orthogonal to detection axis 625.Therefore, the plane of photodetector array 523 can be inclination relative to detection axis 625 , to realize the high quality imaging at light detection array 623.

Figure 11 shows this inclined three example arrangements.Figure 11 (1) shows induction region 615a inclination and does not hang down Directly in detection axis 625.Under the specific condition shown in (2), induction region 615b is aligned in detection axis 625, and image is flat Face can also be located in detection axis 625.In practice, lens 621 can be cut away partly to simplify encapsulation.In various implementations, micro- Lens 621 are also possible to transmission-type or reflection lens.For example, showing specific approach in (3).Induction region 615c by As mirror 621a is imaged.Photodiode array 623b is aligned to detect signal.

In the above-mentioned design using lens 621, the effective aperture of lens 621 can be designed as being greater than LCD display layer In hole aperture, the latter allows light transmission to pass through LCD display module to carry out optical finger print induction.This design can be reduced The caused undesirable influence of wire structures and other scatterers in LCD display module.

Figure 12 shows the behaviour for being used to reduce or eliminate the influence from bias light in fingerprint induction of fingerprint sensor The example of work.Optic sensor array can be used for capturing various frames, and the frame captured can be used for carrying out multiple frames it Between difference and average operation, to reduce the influence of bias light.For example, opening the illumination for optical finger print induction in frame A Light source in frame B, changes or closes illumination to illuminate the region of finger touch.The signal for subtracting frame B from the signal of frame A can be with Using in image procossing, influenced with reducing undesirable bias light.

The undesirable bias light in fingerprint induction can also be reduced by providing suitable optical filtering in the optical path. One or more optical filters can be used for filtering out that ambient light wave is long, for example, near infrared light and partial feux rouges etc..One In a little implementations, this optical filtering coating can be made over the surfaces of the optical components, including display bottom surface, prism table Face or sensor surface etc..For example, the major part in the energy of light of human finger's absorbing wavelength lower than~580nm, if one A or multiple optical filters or optical filtering coating can be designed as wavelength-filtered from 580nm to infrared light, then can be big The big influence for reducing environment light to the optical detection in fingerprint induction.

Figure 13 shows the example of the operating process for correcting the image fault in optical sensor module.In step At 1301, one or more lighting sources are controlled and are operated in and shone in a particular area, and the light emitting of this pixel It is modulated by frequency F.At step 1302, the frame rate of the imaging sensor under display panel be operating as with identical frequency F and A certain frame per second captures image.In optical finger print inductive operation, finger is placed on the top of display panel cover board substrate, and And the light reflected intensity of the display panel cover board substrate top surface is modulated in the presence of finger.Imaging sensor capture under the display The reflected light pattern of fingerprint modulation.It is synchronous with frequency F to the demodulation of the signal from imaging sensor at step 1303, And carry out filtering background.Resulting image reduces the influence of bias light, and generated including the light from pixel emission Image.At step 1304, the image captured is handled and calibrates, to correct image systematic distortion.At step 1305, high-ranking officers Image just is used as the mankind fingerprint image for user authentication.

The identical optical sensor used for capturing the fingerprint of user, which can be also used for capturing coming from, is illuminated hand The scattering light of finger, as shown in the light 191 scattered in bottom in Fig. 5 A.It can integrate scattering in bottom in Fig. 5 A Light 191 area-of-interest in detector signal, to generate strength signal.The Strength Changes of the strength signal are assessed with true Determine the heart rate of user.

Above-mentioned fingerprint sensor can be capable of the fingerprint of authorized user and be replicated the fingerprint pattern being tampered The individual hacker attack of malice on the carrier for being similar to human finger.The fingerprint pattern of this unauthorized can be used in fingerprint On sensor, to unlock target device.Therefore, fingerprint pattern, despite unique biochemical characterization identifier, itself may not It is completely reliable or safe mark.Optical sensor module is also used as optics anti-spoofing sensor under screen, for feeling Whether the input object that should have fingerprint pattern is the finger from living person, and for determining whether fingerprint input is that fingerprint is taken advantage of Deceive attack.This optics anti-spoofing inducing function is provided without using individual optical sensor.Optics anti-spoofing can mention Whole Response speed for high-speed response, without damaging fingerprint inductive operation.

Figure 14 shows the exemplary extinction coefficient of the material monitored in blood, and the optical absorption in blood is such as It is different between the infra-red range of the infrared light of the limit of visible spectrum of the feux rouges of 660nm and such as 940nm.By using detection Light can be captured defeated with illuminating finger in second different wave length such as the first visible wavelengths (color A) and infrared wavelength (color B) Enter the difference of the optical absorption of object, to determine whether the object touched is the finger from living person.Optics is used for for providing One or more lighting sources of the illumination of induction can be used for emitting the light of different colours, to issue at least two different light The detection light or illumination light for learning wavelength, carry out live finger detection to use the different optical absorption behaviors of blood.When people's When heartbeat, pulse pressure pump blood flows in the artery, therefore the extinction ratio of the material monitored in blood is with arteries and veins It fights and changes.The signal received carries pulse signal.It is living that these properties of blood, which can be used for detecting monitored material, Body fingerprint or false fingerprint.

Figure 15 shows the optical signalling behavior in non-living material (such as prosthetic finger) and the reflected light of live finger Between comparison.Optical fingerprint sensor is also used as heartbeat sensor operation, to monitor the biology to live.It is visited when detecting When surveying two or more wavelength of light, extinction ratio difference can be used for quickly determining whether monitored material is the life to live Object, such as living body finger print.In the example depicted in fig. 15, used the detection light of different wave length, as shown in figure 14, one be can Apparent wavelength, another is infrared wavelength.

When top blind flange glass above non-living material touch fingerprint sensor module, the signal received is disclosed Strength level relevant to the picture on surface of the non-living material, and the signal received does not include the finger phase with living person Associated signal component.However, the signal received discloses and living person when the finger of living person touches top blind flange glass Associated signal characteristic, since the extinction ratio of different wave length is different, so the signal received includes visibly different strong Degree is horizontal.This method do not need to take a long time determine touch material whether be living person a part.In Figure 15, pulse type The signal reaction situation of multiple touch, rather than blood pulse.The similar multiple touch of non-living material is not shown by living Difference caused by body finger.

This optical sensor of different optical absorption behaviors of the blood at different optical wavelengths can in short cycle into Row, be used for live finger detection, and can than use the people of identical optical sensor heartbeat optical detection faster.

In a lcd display, LCD backlight illumination light is white light, therefore includes the light of visible light and IR spectral region, is used for Above-mentioned live finger detection is executed at optical sensor module.LCD colored filter in LCD display module can be used for permitting Perhaps optical sensor module obtains the measurement result in Figure 14 and 15.Optical sensor is used for for generating furthermore it is possible to operate The specified light source 436 of illumination light, to issue detection light, and optical detection in different moments with selected visible wavelength and IR wavelength The reflection that device array 621 captures two different wave lengths detects light, to determine quilt based on aforesaid operations shown in Figure 14 and 15 Whether the object of touch is live finger.It is worth noting that, although in different time in selected visible wavelength and IR wavelength The detection light of place's reflection can reflect the different optical absorption characteristics of blood, but fingerprint image is always by selected visible wave The detection light of long detection light and IR wavelength is captured in different moments.Therefore, fingerprint induction can be in visible wavelength and infrared It is carried out at wavelength.

Figure 16 is shown by operating one or more lighting sources for optical sensor to use two kinds of different colours Illumination bright finger determine whether the object contacted with LCD display screen is that the operating process of a part of live finger is shown Example.

For another example, disclosed optical sensor technology can be used for by except above-mentioned blood at different optical wavelengths not With other mechanism except optical absorption, fingerprint or hand being captured by the detection of " live finger " testing mechanism or detecting The pattern of the palm whether the hand from living person.For example, due to the natural mobile or movement (intentional or unintentional) of people, the finger of living person It usually moves or stretches, or when blood flows through human body relevant to heartbeat, the finger of living person is usually to pulse.One In a implementation, optical sensor module can detecte the light of the return from finger or palm due to heartbeat/lectin from hemolymph Change caused by change, so that detection is in the object for showing as finger or palm with the presence or absence of the heartbeat to live.User authentication Access control can be enhanced based on fingerprint/palm pattern optical sensor and the combination determined to the front there are living person.Make For another example, when people touches LCD display screen, the variation of touch force can reflect in one or more ways, including Fingerprint pattern deformation, the variation of the contact area between finger and screen surface, fingerprint ridge broadens or the dynamic change of blood flow. These or other variation can be by being measured based on the optical sensor of disclosed optical sensor technology, and can be used for Calculate touch force.This touch force induction can be used for adding more function in addition to fingerprint induction for optical sensor module Energy.

In the examples described above, as shown in Fig. 4 B and Fig. 6 B, fingerprint pattern is trapped in optical sensor via image-forming module On array, optical distortion typically reduces image sensing fidelity.This image fault can correct in various ways.Example Such as, known pattern can be used to generate optical imagery at optic sensor array, and the image in known pattern is sat Mark can be associated with the optical imagery that the distortion at optic sensor array generates, and is exported with calibration by optic sensor array For fingerprint induction imaging inductive signal.The image calibration output coordinate of fingerprint induction module reference standard pattern.

According to the content disclosed in this patent document, various realities can be carried out to disclosed optical sensor module It is existing.

For example, display panel can be configured to: each light emitting pixel therein can be independently controlled；Display panel includes The transparent cover board substrate of at least partly transparent substrate and essence.Optical sensor module is located under display panel, with induction The image formed on the top of panel surface.Optical sensor module can be used for incuding to be emitted from display panel pixel Light be formed by image.Optical sensor module may include that refractive index is transparent lower than the refractive index of panel substrate Block further includes the imaging sensor block and optical imaging lens with imaging sensor array.In some implementations, low The refractive index of refractive index block is in the range of 1.35 to 1.46 or 1 to 1.35.

For another example, a kind of method for fingerprint induction can be provided, wherein the light emitted from display panel is by cover board substrate Reflection, the finger in cover board substrate top are interacted with light, to pass through fingerprint modulation light reflection graphic patterns.Under display panel at As induction module is used to incude the light pattern image reflected, and fingerprint image is rebuild.In one implementation, in the time domain The transmitting light from display panel is modulated, and imaging sensor is synchronous with the transmitting modulation of pixel, the solution based on such setting Modulated process can refuse most of light in bias light (light for being not from object pixel).

The various designs of optical sensor module under the disclosed screen for optical finger print induction are considered in conduct Application No. is 62/289,328 U.S. Provisional Application and application No. is a part of 62/330,833 U.S. Provisional Application The attachment 3 of entitled " multifunctional fingerprint sensor and encapsulation " (texts of page 41 and the attached drawings of page 26) and June 20 in 2016 It is day being submitted in USPTO, application No. is PCT/US2016/038445, entitled " multi-functional with optical sensor ability The international patent application of fingerprint sensor " is (it is required that on June 18th, 2015 is submitting, application No. is 62/181,718 U.S. The priority of temporary patent application, and disclosed on December 22nd, 2016 with WO2016/205832) neutralize on November 2nd, 2016 The world of " the multifunctional fingerprint sensor with the optical sensor of defence fingerprint spoof " submit in SIPO, entitled is specially Benefit application is (it is required that submitting, application No. is 62/249,832, Publication No. WO 2017/076292 on November 2nd, 2015 The priority of U.S. Provisional Patent Application).The complete disclosure of above-mentioned patent application is incorporated by reference into this patent document public affairs Open a part of content.

Under the screen disclosed herein incuded for fingerprint in the various realizations of optical sensor module technology, Ke Yishi The touch partial optical of existing finger being illuminated is imaged under screen the optic sensor array in optical sensor module, without Use the image-forming modules such as lens by the way that the light returned from the touch part of finger is imaged under illumination optical.Mould is not imaged One technological challenge of the optical finger print induction of block is how to control the propagation of the light of return, and this propagation may be disturbed spatially The light that the different location of slave finger at random optic sensor array touched on part returns, so that the light when this return arrives When up to optic sensor array, the spatial information of different location may be lost.This challenge can be by using optics collimator Or the optical imagery module under pinhole array substitution screen in optical sensor module detects fingerprint by optical sensor to solve. It is a kind of for realizing this optical finger print send equipment may include: device screen, provide touch sensible operation and including Display panel structure with light emitting display pixels, each pixel can be operated to shine, to form a part of display image；Top Portion's hyaline layer, is formed on device screen, as the user's touch interface operated for touch sensible and is used for transmission Image is shown to the interface of user from the light of display structure；And optical sensor module, it is located under display panel structure Side, with receive by the light emitting display pixels of display structure at least part issue and from top clear return light Lai Fingerprint is detected, which includes optic sensor array, which receives the light returned, the light Learn sensor module further include positioned at the return light the path to optic sensor array in optics collimator array or Pinhole array.Optics collimator array is used to collect the light of the return from display panel structure, and separates saturating from top The light of different location in bright layer, while the light for the return being collected into is directed toward optic sensor array.

Different collimators is used dependent in different location using the imaging of collimator, it will be from the not same district of fingerprint The light in domain is spatially separated the different fluorescence detectors in optical detector array.Each collimator is along the collimator Thickness or length can be designed as controlling each collimator optical view narrow field, for example, being only from the finger being illuminated On the light of zonule captured by each collimator, and be projected to several adjacent fluorescence detectors in optical detector array On.For example, can be by each collimator along the thickness of the collimator or very big, such as several hundred microns, so that often of Design of length The field of the optical view of a collimator can permit zonule transmission imaging of the collimator on optical detector array, than Such as, a fluorescence detector in optical detector array or several adjacent fluorescence detectors (for example, in some cases, More than ten microns of the region on every side of optical detector array).

Following part explains optics collimator array by example or how pinhole array is used to carry out optics under screen Fingerprint induction, the example use optics collimator when optical finger print incudes in mixing inducing pixel, and each mixing incudes picture Element has the optical sensor for capturing the capacitance type sensor of finger print information and for capturing finger print information.

Figure 17 A and 17B show the mixing that capacitive sensing and optical sensor are incorporated in same inducing pixel and incude picture Two examples of element design.

Figure 17 A shows the example of finger sensor apparatus 2100, and the finger sensor apparatus 2100 is in capture fingerprint letter When breath, capacitance type sensor is incorporated on the basis of optical sensor for each sensor pixel of sensor pixel array.It is logical It crosses and combines capacitance type sensor and optical sensor, can be used for preferably decomposing using the fingerprint image that optical sensor obtains The 3D dactylotype obtained using capacitance type sensor.For illustrative purposes, the representation sensor pixel shown in Figure 17 A A sensor pixel in array, and each sensor pixel includes that optics disposed adjacent one another in same pixel passes Sensor 2102 and capacitance type sensor 2114.

Optical sensor 2102 includes photoelectric detector 2108 and the collimator 2106 being placed in above photoelectric detector 2108, So as to narrow or focus towards photoelectric detector 2108 from the light 2124 that finger 2102 reflects.The one or more such as LED light source is (not Show) it can be placed on around collimator 2106 and shine, which is reflected into reflected light 2124 by finger, and is pointed to corresponding Photoelectric detector 2108 or focused towards corresponding photoelectric detector 2108, one in fingerprint image to capture finger 2102 Part.Fiber optic bundle or one or more metal layers with hole or opening can be used to realize in collimator 2106.It is this in light Learning may be used as the fingerprint graph that capture has desired spatial resolution using multiple optics collimators above detector array Non-lens optical design, to carry out reliable optical finger print induction.Figure 17 A is shown using one with hole or opening 2112 The collimator 2106 that a or multiple metal layers 2110 are realized.In top structure or layer 2104 and photoelectric detector 2108 in Figure 17 A Between layer in collimator 2106 include by optical fiber or one or more layers (such as silicon or metal) hole or opening formed it is more A individual optics collimator, each of this individual optics collimator receive the longitudinal direction along each optics collimator Or the light 2124 in small angular region, as shown, light 2124 can be by each opening or the top opening and pipe in hole Shape structures capture, so that the light with large angle incidence from each optics collimator longitudinal direction is refused to reach by each collimator Optical photoconductor diode on the other end of the optics collimator.

In the capacitive induction part of each inducing pixel, capacitance type sensor 2114 includes capacitance type sensor plate 2116, the capacitance type sensor plate 2116 be electromagnetically coupled to and inducing pixel near to or in contact with finger a part, with carry out Capacitive induction.More specifically, when finger 2102 and the movement of optional cover board 2104 or realization finger sensor apparatus 2100 are set When standby upper cover board is contacted or is within close proximity, capacitance type sensor plate 2116 and finger 2102 are as one or more condenser types members Two plates of part 2122 interact.The quantity of capacitance type sensor plate 2116 can be based on the design of capacitance type sensor 2114 And change.One or more metal layers can be used to realize in capacitance type sensor plate 2116.Capacitance type sensor plate 2116 is logical Letter ground is coupled to capacitive sensor circuits 2120, so that capacitive sensor circuits 2120 can handle from capacitive sensing The signal of device plate 2116, to obtain indicating the signal of 3D dactylotype.It can be passed in capacitance type sensor plate 2116 and condenser type Setting routing or shielding material between sensor circuit, with electrical shielding metal plate 2116.Capacitive sensor circuits 2120 can lead to Letter ground is coupled to capacitance type sensor plate 2116 and photoelectric detector 2108, to handle the letter from capacitance type sensor plate 2116 Number and the signal from photoelectric detector 2108.In Figure 17 A, capacitance type sensor and optics in each mixing inducing pixel are passed Sensor is adjacent to each other and mutually there is displacement, without being spatially overlapped.

In implementation, the optical sensors feature such as optics collimator design in hybrid sensor design in Figure 17 A, It can be used under screen in optical sensor module.Therefore, the optical sensor in Figure 17 A with optics collimator feature can be It can be detected by optical sensor and be realized in the mobile device or electronic equipment of fingerprint, the mobile device or electronic equipment include: Show screen construction；The top clear being formed on device screen structure, as user's touch interface and as being used for The light from display screen construction is transmitted so that image to be shown to the interface of user；And optical sensor module, it is located at display Fingerprint is detected to receive the light returned from top clear in the lower section of screen construction.Optical sensor module includes receiving to return The optic sensor array of the photoelectric detector of the light returned, further includes optics collimator array, to be received by display screen construction Collect the light of the return from top clear, and separate the light of the different location in top clear, while will collect To return light pass through optics collimator be directed toward optic sensor array in photoelectric detector.

Figure 17 B shows another example of finger sensor apparatus 2130, which is incuding Optical sensor and capacitive sensor structure are integrated in the configuration overlapped in space by each mix in device pixel array It closes in sensor pixel, to reduce each mixing inducing pixel the space occupied.Finger sensor apparatus 2130 is half including silicon etc. Conductor substrate 2131.Multiple sensing elements or inducing pixel 2139 are set on substrate 2131.Each sensing element or induction picture Element 2139 includes active electronic circuit region 2132, which includes cmos switch, amplifier, resistance Device and capacitor, to handle sensor signal.Each inducing pixel or sensing element 2139 include being arranged or being embedded in active electronic Photoelectric detector 2133 in circuit region 2132.The capacitance type sensor plate of capacitance type sensor for capacitive induction or Top electrodes 2134 be arranged on photoelectric detector 2133, and including on sensor board 2134 hole or opening 2138, also rise To the effect of the collimator for the light being directed toward light on photoelectric detector 2133.Through-hole 2135 filled with conductive material is set, with Top electrodes 2134 are electrically connected to active circuit element 2132.By adjusting opening or hole and top electrodes 2134 and photoelectricity The distance of detector 2133, the light collection angle 2137 of adjustable photoelectric detector (such as photodiode) 2133.Fingerprint sensing Device equipment 2130 is covered by cover sheet 2136, which includes hard material, such as sapphire, glass etc..Light The light collection angle 2137 of photodetector 2133 can be designed as saving the spatial discrimination for the image collected by photodiode array Rate.The light sources such as LED 2140 are located at below cover board, and in the side of finger sensor apparatus 2130 to shine, the light is anti-by finger Photoelectric detector 2133 is penetrated and is directed toward, to capture fingerprint image.When finger touch cover sheet or with cover sheet it is very close when, Finger and the combination for incuding top electrodes 2134 form human body and incude capacitive coupling (such as capacitor between top electrodes 2134 2142).Finger sensor apparatus 2130 including optical sensor and capacitance type sensor can obtain the light reflectogram of fingerprint Picture and capacitive coupling image both images.Incude top electrodes 2134 and be used for dual purpose: 1) being used for capacitive induction, and 2) light emitted from finger is directed toward light as collimator (by manufacturing one or more holes on induction top electrodes 2134) Photodetector 2133 narrows or focuses towards photoelectric detector 2133.The recycling of induction top electrodes 2134 is eliminated to attached Add the needs of metal layer or fiber optic bundle, to reduce the size of each pixel, and therefore reduces finger sensor apparatus 2130 overall dimensions.

In Figure 17 B, in 17B, optical sensor design using the bottom array 2133 of top layer 2136 and photoelectric detector it Between the hole that is formed or opening 2138 as optics collimator, only to select the light in certain angles 2137, to keep as schemed Shown in the spatial resolution of image collected of photoelectric detector 2133 in photodetector array.Similar in Figure 17 A Optical fiber or other tubular optical collimators, the hole formed between top layer 2136 and the bottom array of photoelectric detector 2133 or are opened Mouth 2138 constitutes optics collimator, collects the light of the return from top clear via display screen construction, and separate The light of different location in top clear, while the light for the return being collected into is passed through into optics collimator and is directed toward photoelectricity inspection Survey device 2133.

Figure 18 is that the exemplary mixing being incorporated to optical sensor and capacitance type sensor in each mixing inducing pixel refers to The top view of line sensor device 2200.Finger sensor apparatus 2200 is embodied as CMOS silicon chip 2221, the CMOS silicon chip 2221 include mixing (being incorporated to optical sensor and capacitance type sensor) sensing element array or pixel array 2222.Alternatively Ground, the optical layout in Figure 18 can be also used for all optical sensors designs, split shed or hole 2223 disclosed in this document Indicate the optics collimator in Figure 17 A and 17B.For example, the size or size of sensing element can be in 25 μm to 250 μm of ranges It is interior.Hybrid sensor equipment 2220 may include support circuits array, which includes in lateral side regions 2224 Amplifier, analog-digital converter and buffer storage.In addition, hybrid sensor equipment 2200 may include for wire bonding or convex Play the region 2225 of engagement.The top layer 2226 of hybrid sensor element 2222 may include the metal electrode for capacitive sensing. One or more openings or hole 2223 can be manufactured in each top metal electrode 23, be used as in structure collimator by Light is guided on the photoelectric detector being radiated at below top electrodes with vertical direction.Therefore, 2226 structure of top layer can be used for light Learn the dual purpose of induction and capacitive sensing.A kind of sensor device processor can be provided, with processing from mixing induction picture The pixel output signal of element, come the information that takes the fingerprint.

Except shared as collimator for capacitive sensing and identical structure for focusing light in vertical direction in addition to, can be with An example of shared sensor signal deteching circuit between optical sensor and capacitance type sensor comes from photoelectricity with detection The sensor signal of detector and capacitance type sensor plate.

Figure 19 A shows the exemplary mixed-fingerprint induction member with the capacitive sensing for fingerprint and optical sensor function Part or pixel 2300.The illustrative sensors pixel 2300 includes Transducer Signal Detecting Circuit 2316, to detect or obtain Based on capacitive sensing come the sensor signal of self-induction top electrodes (such as metal layer at top) 2308 and based on optical sensor Optionally switched between inductive signal from photoelectric detector (such as photodiode) 2314, with obtain finger from light The reflection optical imagery of photodetector 2314 and the capacitive coupling image from capacitive sensor electrode 2308.In some realizations In mode, two from the two kinds of induction mechanisms image in each mixing inducing pixel can be examined serially by sensor signal Slowdown monitoring circuit processing.In the example shown, switch 2310 and 2312, which includes, is electrically coupled to induction top electrodes 2308 and light The first end of photodetector 2314, and it is coupled to the second end of the shared input of Transducer Signal Detecting Circuit 2316, with The corresponding fluorescence detector signal from photoelectric detector 2314 and corresponding is provided to Transducer Signal Detecting Circuit 2316 Carry out the capacitive sensing signal of self-induction top electrodes 2308.When switch 2310 disconnects (CAP_EN=0) and the closure of switch 2312 (Optical_en=1) when, Transducer Signal Detecting Circuit 2316 obtains what expression received at specific blend inducing pixel Scan the fluorescence detector signal of the optical imagery of fingerprint.As the CAP_EN=1 of switch 2310 and optics _ en=0, sensor The capacitive sensing signal of the available capacitance image for indicating scanning fingerprint of signal deteching circuit 2316.In optical imagery and capacitor Image is acquired later, and two images can be handled either individually or in combination in circuit downstream, to identify fingerprint characteristic.

It, can be by utilizing two kinds of figure in different ways using two kinds of image modes of above-mentioned mixing inducing pixel As come the performance that enhances fingerprint recognition.The fingerprint recognition of this enhancing can pass through the sensors such as sensor device processor 2321 Device handler is realized, for handling the pixel output signal from mixing inducing pixel, with the information that takes the fingerprint.For example, Capacitance image can provide the 3D rendering of the depth of the ridge and paddy about fingerprint characteristic.As the supplement of 3D capacitance image, optics Image can provide the high resolution 2 D information about fingerprint characteristic.Because two kinds of image informations are directed to identical fingerprint Ridge, so the optics 2D image with more high spatial resolution can be used for restoring capacitive sensing image resolution ratio.In some realities In existing mode, compared with optical sensor method, capacitive sensing method can more sensitively and accurately identify the paddy of fingerprint, use Capacitive sensing method obtain image spatial resolution can the thickness based on cover board and deteriorate.This aspect of capacitive sensing It can be made up by optical sensor.In operation, sensor response be can be fixed, and the point diffusion of capacitance type sensor Function can be fixed all sensor positions.The optical sensor of higher resolution may be used as resolution ratio recovery side Method, and can apply on capacitive sensing image to enhance 3D rendering.Part high-definition picture from optical sensor can To be used to help the restoration methods.It therefore, can be by enhancing 3D capacitor based on the interpolation of high resolution 2 D image or recovery Image, to provide the more information about valley and a ridge.

The 3D rendering of enhancing can provide improved fingerprint recognition and matching.In another example, light can be stored together Image and capacitance image are learned, is compared with providing two kinds when carrying out fingerprint recognition or matching every time.Use two kinds of image It is compared and enhances the accuracy and safety of fingerprint induction system.

Transducer Signal Detecting Circuit 2316 can be used a variety of different circuit designs and realize in various ways.At one In example, integral sensor circuit 2318 can be implemented as storing the charge as caused by the touch of ridge or paddy or the lid from mobile device Charge caused by the cover board of the very close finger sensor apparatus of plate.To integrating circuit 2318 comprising enhancing signal-to-noise ratio (SNR).Integrator sensor circuit includes operational amplifier 2322, to amplify at the top of the induction by illustrative sensors pixel 2300 The sensor signal that electrode 2308 or photoelectric detector 2314 detect, as capacitance correlated signal or optical correlation signal (for example, Voltage signal).Induction top electrodes 2308 including one of various metals conductive material are electrically connected to by switch 2310 The negative terminal or inverting input terminal 2328 of amplifier 2322.The local surfaces 2302 of induction top electrodes 2108 and finger play capacitor The effect of the opposite plate of device Cf 2302.Local surfaces of the capacitor of capacitor Cf 2302 based on finger and induction top electrodes The distance between 2308 ' d ' variation, the distance between distance ' d ' i.e. two plates of capacitor Cf 2302.Capacitor Cf2302 Capacitor be inversely proportional with the distance between two plates of capacitor Cf 2302 ' d '.When the ridge of induction top electrodes 2308 and finger The capacitor of capacitor Cf 2302 is greater than the electricity of the capacitor Cf2302 when induction top electrodes 2308 are opposite with the paddy of finger when opposite Hold.

In addition, various parasitic capacitances can be formed between different conducting elements in illustrative sensors pixel 2300 Device or other capacitors.For example, capacitor parasitics can be formed between induction top electrodes 2308 and equipment ground end 2305 CP 2304.Equipment ground is closely coupled to the earth.Another capacitor Cr 2324 can be in the output conductor of amplifier 2322 It is formed between the negative terminal or inverting input terminal 2328 of amplifier 2322, and plays the work of the feedback capacity of amplifier 2322 With.Also, switch 2326 can be coupled in the output end of amplifier 2322 and the negative terminal or inverting input terminal of amplifier 2322 Between 2328, to reset integrating circuit 2318.

The anode of amplifier 2322 is electrically connected to pumping signal Vref.It, can be directly to special in each sensor pixel Pumping signal Verf is provided with the anode of amplifier.By directly providing pumping signal Verf to the anode of amplifier 2322, show Example property sensor pixel 2100 becomes active sensor pixel.In addition, directly providing pumping signal to the anode of amplifier 2322 Verf eliminates the needs of the excitation electrode shared including all the sensors pixel, reduces half from sensor chip in this way Conduction (such as metal) layer of conductor structure.In some implementations, based on the design of sensor pixel, it is possible to implement optional Electrode 2306 is motivated to enhance SNR.In addition, by directly providing pumping signal Verf, pumping signal Vref to amplifier 2322 It is not directly applied to finger, to avoid the potential stimulation or injury to finger.Moreover, pumping signal directly ought be applied to hand When the excitation electrode of finger is not used by, all components of finger sensor apparatus can be integrated into single package equipment, and And entire finger sensor apparatus can be set under cover sheet glass.Since the setting of entire finger sensor apparatus is being protected Under protecting cover glass sheet, protect finger sensor apparatus from the finger of fingerprint sensor and the shadow of other outer members may be damaged It rings.

In Figure 19 A, output signal (the optics output letter of the Transducer Signal Detecting Circuit 2316 in sensor pixel 2300 Number and capacitor output signal) (such as Vpo of amplifier 2322) be electrically coupled to switch 2320, selectively by output signal Vpo The signal processing circuit including filter is output to from sensor pixel 2300.Transistor can be used in switch 2320 or other are cut It changes planes and makes to realize, and may be electrically coupled to controller, with the switching of control switch 2320.By control switch 2320, 2310 and 2312, is obtaining optical signalling and obtaining capacitor letter to the sensor pixel property of can choose in sensor pixel array Switch between number.In one implementation, in available array the sensor pixel of every a line, row or column optical signalling Or capacitance signal, switch the optical signalling or capacitance signal then to obtain the other types signal of the row, row or column.It can be by Row carries out the switching between optical signalling acquisition and capacitance signal acquisition.In another implementation, institute in available array There is a type of signal (capacitance signal or optical signalling) of sensor pixel or element, then switches the signal of this type To obtain the other kinds of signal of all the sensors pixel or element.Therefore, between the acquisition of different signal types Switching can occur in entire array.Other deformations of switching between the acquisition of two kinds of sensor signal can be real It is existing.

Figure 19 B shows the circuit diagram of another exemplary mixed-fingerprint sensing element or pixel 2340.For with identical The component of appended drawing reference, mixed-fingerprint sensing element or pixel 2340 and mixed-fingerprint sensing element or the substantive phase of pixel 2300 Together.Description for the common elements with same reference numerals, referring to the description of Figure 19 A.

Mixed-fingerprint sensing element or pixel 2340 are using induction top electrodes 2308, on it to include playing collimator The hole of effect or opening 2342, the light 2344 that will reflect is towards photoelectric detector 2314 (such as photodiode) focusing or narrow Change.Photoelectric detector 2314 can be located at or be arranged in the lower section for the collimator that use feeling answers top electrodes 2308 to realize, to catch Obtain the light 2344 of the reflection focused by collimator 2308.

It in some implementations, may include the Transducer Signal Detecting Circuit of optical sensor and capacitance type sensor Independent example, concurrently to detect the sensor signal from photoelectric detector and capacitance type sensor plate.

Figure 19 C shows the circuit diagram of exemplary mixed-fingerprint sensing element or pixel 2350, for examining to from photoelectricity The sensor signal for surveying device and capacitance type sensor plate carries out parallel detection.For the component with same reference numerals, mixing Fingerprint sensing element or pixel 2350 and mixed-fingerprint sensing element or pixel 2340 are substantially identical.For with identical attached drawing mark The description of the common elements of note, referring to the description of Figure 19 A.

In order to carry out parallel detection, mixed-fingerprint sensing element to the sensor signal from capacitor board and photoelectric detector Or pixel 2350 includes that the individual sensor being communicatively coupled respectively with induction top electrodes 2308 and photoelectric detector 2324 is believed Number detection circuit 2316 and 2317.Transducer Signal Detecting Circuit 2317 can be implemented as being substantially similar to sensor signal inspection Slowdown monitoring circuit 2316.In some implementations, switch 2310 and 2312, which can be set to have, is electrically coupled to induction top The first end of electrode 2308 and photoelectric detector 2314, and it is respectively coupled to the of Transducer Signal Detecting Circuit 2316 and 2317 Two ends, to provide the fluorescence detector letter from photoelectric detector 2314 respectively to Transducer Signal Detecting Circuit 2316 and 2317 Number and carry out the capacitive sensing signals of self-induction top electrodes 2308.When switch 2310 and 2312 open and close together, sensing Device signal deteching circuit 2316 and 2317 can concurrently be believed from the sensor of capacitor board 2308 and photoelectric detector 2314 It number is detected.When switch 2310 and 2312 is mutually out of phase ground open and close, 2316 He of Transducer Signal Detecting Circuit 2317 can serially detect the sensor signal from capacitor board 2308 and photoelectric detector 2314.In addition, sensing Device device handler 2321 can directly or indirectly be communicatively coupled to sensor signal detection by switch 2320A and 2320B Circuit 2316 and 2317, concurrently or sequentially to handle the sensing from capacitor board 2308 and photoelectric detector 2314 detected Device signal.

In the another aspect of disclosed technology, due to the heartbeat and pump action of heart, for Figure 17 A, 17B, 18, The optical sensor of 19A and 19B description can be used for changing over time caused by by being changed in measurement finger as blood flow anti- Luminous intensity is penetrated, to measure the heartbeat of people.The information is included in the light received by finger reflection, scattering or diffusion, and It is carried by fluorescence detector signal.Therefore, optical sensor can be used for multiple functions, including obtain fingerprint optical imagery and Measure the heartbeat of people.In implementation, sensor device processor is used to handle one or more fluorescence detector signals, with Extract heartbeat message.This sensor device processor from optical sensor pixel or can mix the picture of inducing pixel with processing Plain output signal is identical with the sensor device processor for the information that takes the fingerprint.

Following section describes the examples for using the various designs of optical sensor module progress fingerprint induction under screen, should The signal light for carrying finger print information is directed toward light using optics collimator array or pinhole array by optical sensor module under screen Learn sensor array.This optics collimator or pin hole are placed under LCD display screen and screen in optical sensor module Optic sensor array between, to couple the desired light that returns from display panel, while filtering optical sensor array is listed in Bias light in optical detection.The realization of this optics collimator or pin hole can simplify the optical detection of optic sensor array Optical design, such as other designs disclosed in patent document do not need using complicated optical imaging designs, as Fig. 6 B, 7, the imaging design in 10A and 11.In addition, the realization of this optics collimator or pin hole can simplify whole optical layout to light The optical alignment of sensor array is learned, and improves the reliability and performance of the optical detection of optic sensor array.Further Ground, this optics collimator or pin hole can simplify significantly manufacture and reduce optical sensor module under screen it is overall at This.

Figure 20 is shown with optics under liquid crystal display (liquid crystal display, LCD) display and screen The example of the smart phone of sensor module, optical sensor module includes for collecting light and light being pointed to use under the screen In the optics collimator array of the optical detector array of optical finger print induction.Touch sensible display system 423 based on LCD exists LCD display system 423 realizes the optical sensor module with photodetector array 621 below.

Touch sensible display system 423 is placed under top blind flange glass 431, which is used as Surface of user interface, for including the various user interface behaviour such as the operation of the touch sensible of user, showing image to user Make, and is used as optical sensor interface, for receiving the finger for optical finger print induction and the operation of other optical sensors, wherein Detection light is pointed to top blind flange glass 431 to illuminate finger inside equipment.Display system 423 is multilayer LCD module 433, including LCD display back light 434 (for example, LED light), the white backlight for LCD module 433 is provided；Optical waveguide Layer 433c, is coupled to LCD display backlight light source 434, to receive and guide back light；LCD structure layer 433a (including such as liquid Brilliant (liquid crystal, LC) elementary layer, LCD electrode, transparent conductive ITO layer, optical polarizator layer, colour filter and touch sense Answer layer)；Backlight diffuser device 433b, is located at below LCD structure layer 433a and above light waveguide-layer 433c, spreads backlight light with space Source is to illuminate the LCD display pixel in LCD structure layer 433a；And optical reflection film layer 433d, it is located under light waveguide-layer 433c Side, is recycled to LCD structure layer for back light to improve efficiency of light and display brightness.LCD in induction window When unit is opened, although micro-structure may exhaust the detection light energy of part, most of LCD structure layer 433a (including Liquid crystal cells, electrode, transparent ITO, polarizer, colour filter, touch sensitive layer etc.) become partially transparent.Light diffuser 433b, light Waveguide 433c, reflectance coating 433d and LCD module frame are processed to keep fingerprint sensor, and provide transparent or partially transparent Incude light path, a part is reached from the light of the reflection of the top surface of cover-plate glass 431 to be had for fingerprint induction With the photodetector array 621 of optical sensor module under the LCD screen of other optical sensors operation.As shown, LCD screen The following optical sensor module of curtain includes various fingerprint sensor components, such as optics collimator array 617, for standard The detection light of reflection is pointed to photodetector array 621 and optical sensor circuit module 623 by direct join, is received and is adjusted Save the output signal from photodetector array 621.Optics collimator array 617 may include optics collimator, and can To be image generator, fiber array, microlens array or pinhole array based on waveguide.Optics collimator is for limiting sample The digital aperture (numeral aperture, NA) of image, and form corresponding pictorial element.Each optics collimator unit obtains Obtain a part of the image of the touch part of the target finger on top glass cover board 431.The transmitted light beam of all collimators is total With the complete image for forming target object at photodetector array 621.Photodiode array 621 can be CMOS induction Cmos sensor, ccd sensor array or the photosensitive suitable optic sensor array of pixel.

This example illustrate including electronic module 435, is shown for LCD and touch sensible operates；It is one or more other Sensor 425, such as the optical sensor of the illumination level for monitoring ambient enviroment；And optional 427 He of side button 429, for controlling certain smart phone operations.

In the example of fig. 20, the light source in shown example includes display backlight light source 434 and additionally specified detection Radiant 436.From the additionally specified light beam 442a for detecting radiant 436 and from the light beam 442b of display light source 434 May be used as sensor detection light, for illuminating finger contact with top glass cover board 431, with generate carry fingerprint pattern with The desired reflection of other information detects light to optical sensor module.

When opening the LCD cell in induction window, although micro-structure may exhaust the detection light energy of part, Most of LCD structure layer 433a (including liquid crystal cells, electrode, transparent ITO, polarizer, colour filter, touch sensitive layer etc.) become It is partially transparent.Light diffuser 433b, optical waveguide 433c, reflectance coating 433d and LCD module frame are processed to keep fingerprint sensing Device, and transparent or partially transparent induction light path is provided.

The operation of optical sensor module under exemplary LCD screen in above-mentioned Figure 20 is further illustrated under Figure 21.At top On cover-plate glass 431, fingerprint induction region or window are the region on the top surface of top blind flange glass 431, the light being located below Learn surface or the near zone of sensor module.Since optical sensor module is located at below LCD structure, window is incuded It is a part of the continuous top surface of top blind flange glass 431, and is also a part of the display area of LCD display.Therefore, On top surface the induction window may be indicated without visible physical interface.The sense can be indicated to the user that by other means Window is answered, is used for fingerprint induction and the operation of other optical sensors to help user that finger is placed in induction window.For example, volume Specified probe source 436 can be used for illuminating induction window outside, so that the region of induction window differs markedly from top blind flange Peripheral region on glass, user it can be easily seen that.This can be completed when LCD panel is closed or LCD panel is opened.

As shown in figure 21, user presses finger on induction window mouth, and detects light beam 82P and illuminate finger.Finger It is reflected with 431 pairs of detection light of cover-plate glass, forms reflection signal beams 82R.Various scattering interfaces in LCD module 433 433S diffuses reflection signal beams 82R, diffuses light beam 82D to be formed.Each collimator list in collimator array 617 Member selection light component 82S and the corresponding photosensitive detector that selected light component 82S is directed to photodetector array 621 In.Photosensitive detector (such as photodiode or CMOS sensor detector) is generated comprising the corresponding of the information about fingerprint pattern Sensor signal.A part of light source can be in the case where the finger induction region on the top surface not first by LCD panel Into fingerprint sensor module.This part light generates ambient noise and can be eliminated by calibrating.Collimator array it is every A collimator unit 617 only selects to arrive photodetector array 621 along what its permission direction was transmitted with relatively low light loss A part in corresponding photoelectric detector light.Therefore, each collimator unit in collimator array 617 and its in photoelectricity Correspondence photoelectric detector in detector array 621 operates together, to define effective detection optics digital aperture (numeral Aperture, NA).The NA directly defines the spatial resolution of the image generated by optical sensor module.

It is designed, is directly contacted with LCD display screen or in LCD display based on optical sensor under disclosed LCD screen The finger of people near curtain can be such that the light returned returns in LCD display screen, while carrying and being exported by LCD display screen The information for a part of finger that illumination is mapped to.This information may include the ridge for the part that such as finger is irradiated to and the sky of paddy Between pattern and position etc..Therefore, optical sensor module can be integrated at least part in the light for capturing this return, To detect the ridge for the part that finger is irradiated to and space pattern and the position of paddy by optical imagery and optical detection operation. It is then detected that the ridge of part that is irradiated to of finger and the space pattern of paddy and position can be processed, to construct fingerprint Pattern simultaneously carries out fingerprint recognition, for example, a part as user authentication and equipment access process, refers to the authorized user of storage Line pattern is compared so that whether the fingerprint confirmly detected is matching fingerprint.By using disclosed optical sensor technology This fingerprint detection based on optical sensor use LCD display screen as optical sensor platform, and can be used for substituting Existing capacitive fingerprint sensing device or other fingerprint sensors, these existing sensors are substantially as " additional " component Standalone sensor without using the light from display screen or uses the fingerprint for mobile phone, tablet computer and other electronic equipments The display screen of induction.

It should be noted that the optical sensor module based on disclosed optical sensor technology may be coupled to LCD Show the region of display surface side of the back side of screen without specifying LCD display screen, and in smart phone, tablet computer Or in the electronic equipments such as wearable device, which can occupy valuable equipment surface space.This optical sensor mould Block can be set under LCD display screen, vertically superposed with display screen area, also, from the perspective of user, the light Sensor module is learned to be hidden in behind display screen area.Further, since the optical sensor of this optical sensor module is It is carried out by detecting the light that top surface issued by LCD display screen and from display area returns, disclosed optics passes Sensor module does not need the special sensor port or induction region with display screen region disconnecting.It therefore, is including apple In other designs of iPhone/iPad equipment or Samsung Galaxy smart phone model etc., fingerprint sensor is located at display screen Similar face on particular fingerprint sensor region or port (such as home button) at and be located at display screen area outside In specified non-display area, different from the fingerprint sensor in other above-mentioned designs, based on disclosed optical sensor skill The optical sensor module of art can be accomplished by the following way: will be returned from finger by using the design of unique optical sensor Optical routing realize high resolution optical imaging sense into optical sensor, and by providing suitable optical imagery mechanism It answers, allows to carry out fingerprint induction at any position on LCD display screen.On this point, disclosed optical sensor Technology provides fingerprint induction configuration on unique screen by using the top touching sensing surface of identical display image, and Touch sensible operation is provided, without individual fingerprint induction region or port is arranged outside display screen area.

Except through the fingerprint detection that optical sensor carries out, optical sensor can be used for measuring other parameters.For example, institute is public The optical sensor technology opened can measure the pattern of the palm of the people of available large touching surface product on entire LCD display screen (on the contrary, some specified fingerprint sensors, as apple iPhone/iPad equipment home button in fingerprint sensor, have The outer fingerprint induction region of fairly small and specified screen may be not suitable for by height limitation in the size of induction region Incude big pattern).For another example, disclosed optical sensor technology can be used not only for capturing and detecting using optical sensor with The pattern of the associated finger of people or palm can be also used for being detected using optical sensor or other induction mechanisms by " living The pattern of fingerprint or palm that body finger " testing mechanism is captured or detecting whether the hand from living person, the testing mechanism It can be based on the fact that due to the natural mobile of living person or moving (intentional or unintentional), the finger of this people is usually to move It is dynamic or stretching, extension, or when blood flows through human body relevant to heartbeat, finger is usually to pulse.In one implementation, Due to heartbeat/blood flow variation, optical sensor module can detecte the variation of the light returned from finger or palm, so that detection exists It shows as in the object of finger or palm with the presence or absence of the heartbeat to live.User authentication can be based on fingerprint/palm pattern light Induction and the combination determined to the front there are living person are learned to enhance access control.For another example, optical sensor module may include Inducing function, for measuring glucose level or oxygen saturation based on the optical sensor of the light from finger or the return of palm Degree.For another example, when people touches LCD display screen, the variation of touch force can reflect in one or more ways, including fingerprint image The variation of contact area between case deformation, finger and screen surface, fingerprint ridge broadens or the dynamic change of blood flow.These variations It can be by being measured based on the optical sensor of disclosed optical sensor technology, and can be used for calculating touch force.This Kind touch force induction can be used in adding for optical sensor module more multi-functional in addition to fingerprint induction.

Relevant useful operation or controlling feature, disclosed optics in terms of for the touch sensible to LCD display screen Sensor technology can provide Trigger Function or additional based on one or more induction results from optical sensor module Function, to carry out certain operations relevant to the control of the touch sensible of LCD display screen.For example, the optical characteristics of finger skin (such as refractive index) is usually different from other cultures.Optical sensor module can be designed as selectively receiving and examining accordingly The light of return caused by the finger contacted as the surface with LCD display screen is surveyed, and the light of the return as caused by other objects is not It can be detected by optical sensor module.This object selectivity optical detection may be used to provide through the useful of touch sensible User's control, such as only could wake up smart phone or equipment via the touch of the finger of people or palm, and other objects The revival that will not cause equipment is touched, to carry out power-save operation and extend the use of battery.This operation can be by being based on The control of the output of optical sensor module is realized, to control the wake-up circuit operation of LCD display screen, wherein for example, can It is used for optical sensor with the additional light source for including design, and the additional light source for opening the design to be at flash mode, with It is intermittently flashed to screen surface to incude any touch of the finger of people or palm, while LCD display screen can be with Sleep pattern is placed in save energy.In some implementations, waking up induction light can be in the sightless spectrum model of infrared ray In enclosing, so user will not undergo the flashing of any visual light.

In some implementations, the optical sensor module based on disclosed optical sensor technology can be configured It for non-invasive module, is easily integrated in LCD display screen, the design without changing LCD display screen To provide the desired optical sensor functions such as fingerprint induction.On this point, based on disclosed optical sensor technology Optical sensor module can independently of specific LCD display screen design design, this is because optical sensor module The optical sensor for having the property that this optical sensor module is issued by detection by LCD display screen and from aobvious Show the light progress that the top surface in region returns, and disclosed optical sensor module is coupled to the back side of LCD display screen, For receiving the light of the return of the top surface from display area, without the specific induction end with display screen region disconnecting Mouth or induction region.Therefore, optical sensor module can be used for combining with LCD display screen under this screen, with aobvious in LCD Optical finger print induction and other sensors function are provided on display screen curtain, are specially designed for providing this optics without the use of having The LCD display screen of the special designing of the hardware of induction.This aspect of disclosed optical sensor technology can make LCD Show screen in smart phone, tablet computer or other increasings with the optical sensor from disclosed optical sensor technology Range in powerful electronic equipment is more extensive.

For example, the existing telephone component for the fingerprint sensor that does not provide separation designs, as certain apple iPhone or Samsung Galaxy model, this existing telephone component design can not change touch inductive display screen curtain component and integrated such as this paper Optical sensor module under the screen, to provide fingerprint inducing function on increased screen.Because of disclosed optics sense It should be not required to specified induction region to be separated or port, as certain apple iPhone/ Samsung Galaxy mobile phones have in display screen Curtain region outside preceding fingerprint sensor, or as Huawei, millet, Google or association some models some smart phones overleaf With specified rear fingerprint sensor, not integrated not the needing to touch sensitive layer of fingerprint induction on screen disclosed herein The change of essence is carried out with the design of existing telephone component or touch sensible display module of display layer.In short, for addition institute It is disclosed for fingerprint induction optical sensor module, the outside of equipment do not need external sensor port and external hardware by Button.Under display screen of the optical sensor module and interlock circuit of addition in shell, and screen can touched Identical touching sensing surface on easily carry out fingerprint induction.

For another example, due to the above-mentioned property of the optical sensor module incuded for fingerprint, this optical sensor mould is integrated The smart phone of block can be updated with improved design, function and integration mechanism, the design without influencing LCD display screen Or the design or manufacture burden of LCD display screen are manufactured or aggravate, to be that device fabrication and improvement/upgrading mention in production life cycle For desired flexibility, while keeping using optics in the smart phone of LCD display screen, tablet computer or other electronic equipments The availability of the more new version of fingerprint sensor.Specifically, touch sensitive layer can be updated when next product is issued or LCD is aobvious Show layer, without any significant hard to do using the fingerprint inducing function of optical sensor module realization under disclosed screen Part changes.In addition, being realized by using optical sensor module under the screen of new version based on this optical sensor module For optical sensor on the improved screen of fingerprint induction or other optical sensor functions, including increasing additional optical sensor function Can, it can be added in the release of new products, without being significantly changed to Telephone Package design.

Above or other features the realization of disclosed optical sensor technology can be mentioned to the electronic equipment of a new generation For improved fingerprint induction and other inducing functions, especially for LCD display screen smart phone, tablet computer and Other electronic equipments to provide various touch sensible operations and functions, and enhance the user experience of this equipment.

Optical sensor technology disclosed herein uses for displaying images within display screen and from equipment display group The light that the top surface of part returns, the induction of Lai Jinhang fingerprint and other inductive operations.The light of the return carries the object contacted with the top surface The information of body (for example, finger), and the light for capturing and detecting the return constitutes and is realizing the spy being located at below display screen A part that design considers when determining optical sensor module.Because the top surface for touching screen assembly is used as fingerprint induction region, institute It should be captured by the optical imaging sensor array in optical sensor module with the optical imagery by touch area, the optics Imaging sensor array has the hi-vision fidelity to original fingerprint to incude for the fingerprint of robust.Optical sensor module It can be designed as realizing this desired optics by being properly configured to capture and detect the optical element of the light returned Imaging.

Figure 22 A-22B shows the example implementations of the design of the optics collimator in Figure 20 and Figure 21.In this example Optics collimator array 2001 include optics collimator array 903 and the optical absorption that is filled between optics collimator 903 Material, with the crosstalk for absorbing light to reduce between different optics collimators.Each collimator 903 in collimator array 2001 can To be edge perpendicular to the direction extension of display panel or extended channel, and light is allowed to transmit with low-loss along its axis.It is quasi- Straight device array 2001 is designed as reducing the optical crosstalk between different optics collimators, and keeps desired sky in optical sensor Between resolution ratio.In some implementations, an optics collimator can correspond only to one in photodetector array 2002 A photoelectric detector.In other implementations, an optics collimator be can correspond in photodetector array 2002 One or more photoelectric detectors.As shown in Figure 22 B, in some designs, the axis of each collimator unit can be perpendicular to It shows screen surface, and can be tilted relative to display surface.In operation, it is carried only along the light of collimator axis propagation Image information.For example, incident light 82P appropriate is reflected to form light 82R.Light 82R then by the pinhole difiration of TFT, and Expand to light 82D.Light part 82S is transferred in photodiode array 2002.Light part 82E far from axis is filled material It absorbs.Reflected light in cover-plate glass surface 431 carries finger print information.Light 901 is at an angle relative to collimator unit axis, Therefore the light can be blocked.A part (such as 901E) of reflected light is transferred in corresponding optics collimator, to reach light Photodetector array 2002.

Optics collimator array can be manufactured by different technologies, including pass through planar substrates etched hole, formation light wave It leads array, formation and the matched microlens array of optical filter, using coreless fiber beam, or prints collimator on slide Deng.The desired character of this collimator array includes: (1) between the light component that axis is propagated and the component gone out from axis propagation Enough transmission contrasts it is expected at the photodetector array in the optical sensor of fingerprint pattern so that collimator ensure that Spatial resolution；(2) the transmission numerical aperture allowed is sufficiently small, to realize the desired high spatial resolution of optical sensor.

Various optics collimator Array Designs can be used.Each optics collimator in optics collimator array is constructed At by transmitting light in the direction of the axis along or close to optics collimator, while stopping the light in other directions, the space Lai Jinhang Filtering, and there is small transmission numerical aperture to realize high spatial resolution by optics collimator array.Small optics passes Defeated numerical aperture also reduces the amount into the bias light of optic sensor array.Collimator element aperture and spacing (such as two The distance between collimator element closed on) it can be designed as realizing the desired spatial resolution that optical finger print incudes.

Figure 23 shows the example of collimator design, and the collimator design is by using two different metals in CMOS structure Layer in alignment hole and become CMOS structure a part.In this particular example, each optics collimator in array is Along the strip channel in the direction perpendicular to display panel.

Figure 24 shows the example that the optical fingerprint sensor module under structure is shown positioned at LCD, in capture finger print information In, which is each optical sensor pixel combination optic sensor array and integrated collimator battle array Column.As shown, optic sensor array includes photodetector array and the collimation that is arranged on photodetector array Device array, optical clear through-hole to include as optics collimator and through-hole between optically opaque metal structure.It will Illumination light is directed toward the touch part for illuminating finger, and the light reflected from finger passes through optics collimator array and is pointed to capture finger The photodetector array of a part of fingerprint image.The optics collimator array can be used with by CMOS technology integrate One or more metal layers of hole or opening are realized.

This optics collimator under screen in optical sensor module can be structured as providing direct point-to-point imaging. For example, the size of optics collimator array and the size of single collimator can be designed as tight fit photoelectric detector battle array respectively The size of the size of column and single photoelectric detector, to realize the one-to-one imaging between optics collimator and photoelectric detector. The whole image that the light received by optical sensor module carries can be by the photoelectric detector battle array of single photoelectric detector It arranges while capturing and being spelled without connecing.

The spatial filtering operation of optics collimator array can be advantageously reduced into the photoelectricity in optical sensor module The amount of the bias light of detector array.Further, since the illumination of the light from OLED pixel emission, it can be in optical sensor module The one or more optical filters of middle setting, to filter bias light, and reduce the amount of the bias light at photodetector array, To improve the optical sensor of the light of the return from fingerprint induction region.For example, the one or more optical filter can match It is set to such as bandpass filter, to be allowed for the transmission of optical sensor illumination light generated, while being stopped in sunlight Other light components such as infrared light.In the outdoor application equipment, this optical filtering can be effectively reduced to be made by sunlight At bias light.The one or more optical filter can be implemented as such as optical filtering coating, the optical filtering coating shape At on one or more interfaces of the optical path along the photodetector array into optical sensor module, or can be with It is embodied as one or more discrete optical filters.

Figure 25, which shows to reduce using optical filtering, reaches under screen photodetector array in optical sensor module The example of the optics collimator array of bias light.The example uses optical waveguide array as optics collimator, and one or Multiple filter coatings are coupled to the optical waveguide array, reach the photodetector array for being coupled to optical waveguide array to reduce Undesirable bias light (such as infrared (infrared light, IR) light from sunlight), simultaneous transmission is for irradiating hand Desired light in the predetermined spectral band of the detection light of finger.Optical waveguide may include the waveguide with or without external waveguide covering Core.Optical waveguide can also be formed by the coreless fiber beam with different optical fiber, wherein each unit collimator is that do not have optical fiber The optical fiber sheet of cored structure.When coreless fiber bunchy, the packing material between optical fiber may include light absorbing material, to increase not The absorption of the stray light guided by coreless fiber.Final collimator can be fitted together with the sub- collimator array of multilayer.

Following part provides the different examples of different optics collimator design and its manufacture.

Figure 26 A and 26B show the example by etching manufacture collimator.In Figure 26 A, it is used to form collimator array In the suitable layers of material of optics collimator be formed on optically transparent supporting substrate or supported by supporting substrate.Etching mask It is formed in this layer above and has for etching the pattern of lower layer to form optics collimator.Suitable etching technics is executed to be formed Optics collimator.Supporting substrate can be in conjunction with collimator array, and can be by the various optical clears including silica etc. Material is formed.

Figure 26 B is shown by via interlayer connecting material (can be adhesive, glass or suitable optically transparent material) The sub- collimator array of stacked multilayer is come the example of the optics collimator array assembled.In some implementations, the son of different layers Collimator array can overlie one another in the case where no interlayer connecting material.This stacking allows along collimator axis system The optics collimator with desired length or depth is made, to realize desired optical numerical aperture.The hole of collimator is geometrically Limit visual angle.Transmission numerical aperture is determined by the thickness and aperture of collimator.In some applications, hole can use optical clear Material filling, and in some designs may be empty.

In some implementations, supporting substrate can be coated with one or more filter coatings to reduce or eliminate bias light (such as IR light from sunlight), simultaneous transmission are used to illuminate desired light in the predetermined spectral band of the detection light of finger.

Figure 27 shows the array of the optical spatial filter coupled with microlens array, wherein each lenticule relative to The respective through hole of optical spatial filter positions, so that each unit collimator includes lenticule and micro- spatial filter, for example, Micropore.The light that each lenticule is configured and positioned to receive focuses on corresponding micro- spatial filter without imaging receiver The light arrived.Micropore limits effective reception numerical aperture.Spatial filter can be printed in optical clear substrate, or be carved Erosion is on a piece of silicon wafer.Microlens array can be handled by MEMS or is chemically treated to etch.Lenticule can also be by ladder Degree refraction materials are made, such as a piece of graded index glass fibre is cut into the length of a quarter spacing.Lenticule Focal length and the diameter in space filtering hole can be used for controlling the launch numerical aperture of each unit.As other designs, collimation Device plate can be coated with filter coating to reduce or eliminate not used light belt in sensor, such as the IR light from sunlight.

Figure 28 shows an example of the integrated CMOS light detection sensor array with built in light collimation.Collimator is logical It crosses 705 array of alignment hole combed in different metal layer 704 and is staggered in and isolated oxide skin(coating) is provided between metal layer 702,703 construct.This some holes can be aligned with the light-sensitive element 701 in optic sensor array.Optical finger print imager is Using this integrated CMOS photodetector array sensor, built in light collimation comes under LCD display module 710 and cover-plate glass It realizes.The fingerprint that user's finger touches the sensor window region of cover-plate glass can be by detecting from fingerprint valley and spinal reflex Light be imaged.The light in fingerprint ridge region can be reduced, because light can compare it by the fingerprint tissue resorption at ridge region The light in lower fingerprint valley region can be stronger.This illumination level difference between the ridge and paddy of fingerprint is at optic sensor array Generate fingerprint pattern.

It is above based on collimator optical sensor module design in, each collimator along the collimator thickness Or length can be designed as greatly to the zonule being transported to imaging on optical detector array, or can be designed as small arrive will Imaging is transported to the big region on optical detector array.When each collimator in collimator array is along the collimator When thickness or length are reduced to certain point, such as at tens microns, the field of the optical zones of each collimator can be relatively large, To cover the last split-phase neighbour fluorescence detector of optical detector array, such as the region of 1mm × 1mm.In the design of some equipment, Optical finger print induction can realize that each pin hole in the pinhole array has sufficiently large optics by using pinhole array Optics inspection is realized when incuding fingerprint to cover a part of adjacent optical detector in optical detector array in vision area field Survey the high image resolution at device array.Compared with the design for using collimator, pinhole array can have thinner size and Lesser amount of pin hole, to realize desired high imaging resolution in no imaging len.Also, it is different from via optics standard The imaging of straight device, the imaging with pinhole array uses each pin hole as pinhole camera, to capture image, is shone based on pin hole The image reconstruction process of camera operation is different from the image reconstruction process by using optics collimator array, it may be assumed that each pin hole Sub-image regions are established, and the sub-image regions of pin hole different in pinhole array are spliced together, to constitute whole image.Tool Have that the image resolution ratio of the optical sensor module of pinhole array is related with the size of the sensor of detector array, so as to To incude resolution ratio by adjusting detector size to adjust or optimize.

It can be based on various semiconductor pattern technologies or technique or other manufacturing methods, relatively simply with lower cost Manufacture pinhole array.Pinhole array can also provide spatial filtering operation, be entered in optical sensor module with being advantageously reduced Photodetector array bias light amount.To design have the optical sensor module of optics collimator it is similar, due to In the illumination of optical sensor illumination light generated, can be arranged in the optical sensor module with pinhole array one or Multiple optical filters to filter bias light, and reduce the amount of the bias light at photodetector array, to improve from finger The optical sensor of the light of the return of line induction region.For example, the one or more optical filter is configurable to such as band logical Filter, to be allowed for the transmission of optical sensor illumination light generated, while stop infrared light in sunlight etc. other Light component.In the outdoor application equipment, the bias light as caused by sunlight is can be effectively reduced in this optical filtering.It should One or more optical filters can be implemented as such as optical filtering coating, which is formed in along to optics On one or more interfaces of the optical path of photodetector array in sensor module, or it can be implemented as one or more A discrete optical filter.

In the optical sensor module based on optics collimator, the optical imagery resolution ratio at optic sensor array can Improved by and configuring optics collimator in a manner of providing pinhole camera effect.Figure 29 shows the one of this design A example.

In Figure 29, the collimator unit 618 of this optics collimator array is by the light from corresponding detection zone unit It guides to photodetector array 621.The hole of collimator unit forms small field of view (field of view, FOV) 618b.If Detector in photodetector array 621 does not capture the details in each unit FOV, then imaging resolution is by each collimator The FOV of unit is determined.In order to improve detection resolution, need to reduce the FOV of each collimator unit.However, being examined when in photoelectricity When surveying each photoelectric detector in device array 621 and gap 618a being provided between corresponding collimator 618, collimator unit Small-bore is used as pin hole.This pinhole camera effect provides higher imaging resolution in the image of each unit FOV.When It, can be with the image detail in recognition unit FOV as shown in insertion piece 621a there are when multiple detecting elements in unit FOV.This Mean that detection resolution is improved.In implementation, such gap can be provided in various ways, including for example exist Optical filtering film 618a is added between collimator 618 and optic sensor array 621.

By pinhole camera effect, the fill factor of collimator plate can be optimized.For example, big in order to detect 10mm × 10mm Small region, if the region of each unit FOV covering 1mm × 1mm, can be used 10 × 10 collimator array.If In each unit FOV, detector can obtain 20 × 20 resolution chart picture, and whole detection resolution ratio is 200 × 200 or 50 Micron or 500psi.This method can be applied to all types of alignment methods.

Figure 30 shows using pinhole camera effect another example for improving optical imagery resolution ratio.In this example, Optical sensor module includes multiple layers: gasket 917, pinhole array 617 (can be the optics collimator with sufficiently small thickness Array), protection materials 919, photodetector array 621 and circuit board 623.Object optical distance is put down by sensitive surface to pin hole Total material thickness in face determines, the thickness of optical thickness, gasket 917 including display module 433, any filtering coatings thickness, Any gap thickness and any adhesive material thickness.Imagery optical distance by pin hole plane to photodetector array total material Expect that thickness determines, including protection materials thickness, any filtering coatings thickness, any gap thickness and any adhesive material are thick Degree.Image magnification ratio is determined compared with object optical distance by imagery optical distance.Detection pattern can be appropriate by being arranged Magnifying power optimizes.For example, magnifying power can be set to less than 1, such as 0.7 or 0.5 etc..In the design of some equipment, pad Piece and pinhole array layer can be combined into single component.In other designs, pinhole array and protective layer can be combined into list A component, to pre-define the centre coordinate of each pin hole.

Figure 31 shows the example of the optical imagery based on pinhole camera effect.It is whole on object side, LCD display panel A detection zone 921 is divided into multiple sub- detection zones 923.Be arranged pinhole array 920 be used for detection zone 921 carry out at Picture.Each pin hole unit in pinhole array 920 is responsible for small field of view (field of view, FOV) 925.Each small FOV 925 Cover sub- detection zone 923.As shown in figure 31, the small FOV of each of pin hole can be overlapped with the small FOV of pin hole adjacent thereto. Every sub- detection zone 923 in image-side, optic sensor array captures image 933.As shown in figure 31, each of pin hole Small FOV 925 has corresponding image-region 935.The magnifying power of the system can be optimized, so that the figure of every sub- detection zone As differentiation can be respectively obtained.In other words, the image of small FOV will not be overlapped.In this detection pattern, each pin hole Centre coordinate is predefined, and the picture point coordinate of each LCD display pixel can be pre-calibrated, and this pre-calibration It can be during sensor operations for generating correction card for calibration.In this design, the image of pinhole camera is inverted, And then signal processing can restore whole image according to correction card.

In the above-mentioned example for optics collimator, used for that will be directed toward from the light of the finger on display screen curtain top In the direction of the optics collimator of the optic sensor array of fingerprint induction table can be touched perpendicular to the top of LCD display screen Face carries out fingerprint induction to collect the detection light returned from finger, and wherein most light is perpendicular to top touch-surface Light direction on.In practice, when touching finger drying, pass through the spy incuded with the substantially vertical return of top touch-surface Light is surveyed, the picture contrast in image detected in optic sensor array is compared to from relative to the vertical of top touch-surface The picture contrast for the identical image that histogram is obtained into angled return detection light is lower.This be to a certain extent because The optical sensor of the angled light returned spatially filters out the light returned strongly from top touch-surface, the wide portion in this part Divide perpendicular to top touch-surface.In view of this aspect of the optical sensor of the detection light returned from top touch-surface, light Learning collimator may be oriented such that the axis of each collimator unit can be tilted relative to top touch-surface, such as scheme In 22B shown in example.

However, during manufacturing, manufacture tilting collimator is more complicated and cost is higher.It is a kind of to use such as Figure 20 and 21B Shown in vertical optical collimator, simultaneously also by selectively detect from top touch-surface return angled light come reality The mode of more high contrast is in existing optical sensor: before light enters vertical optical collimator, in vertical optical collimator and Deflection optical or diffraction device or layer are provided between the light of the return from top touch-surface.In some implementations, should Deflection optical or diffraction device or layer, which can select to only exist in some between OLED display panel and vertical optical collimator, to incline The detection light of the return of rake angle with enter vertical optical collimator, and then by be located at vertical optical collimator the other end on Optical detector array carries out optical detection, while preventing or reducing to return from the top touch-surface perpendicular to top touch-surface The detection light returned enters the amount of optics collimator.The deflection optical or diffraction device or layer may be realized in various forms, including Such as prism array, the optical layer with diffraction pattern or the other equipment between optics collimator and display panel, with It selects the angled detection light returned from display panel to enter optics collimator, while reducing perpendicular to display panel and entering The amount of the detection light of the return of optics collimator.

Figure 32 shows the example that the optical sensor module of optical sensor is carried out using optics pinhole array.As schemed Show, forms pinhole array 920a between LCD display module 433 and optical photodetector array 621, finger 60 is pressed Induction region be imaged on optical photodetector array 621.

The thickness T of layer of pinholes 920a determines field angle (field of view, FOV).Together with from sensitive surface to pin hole battle array It arranges 920a and from imaging plane to the distance of pinhole array 920a, induction region FOVs and imaging region FOVi is determined Justice.Image magnification ratio is provided by Di/Ds, and wherein Di is the optical lens between pinhole array 920a and optic sensor array 621 The thickness of bright layer 919a, and Ds is by 431 combination stack of gasket 917, LCD display module 433 and top blind flange glassy layer Thickness.Such as the device parameter of layer of pinholes thickness T, Ds and Di etc can be directed to the combination of desired FOV and image magnification ratio And it is optimised.Such as, if it is desired, optical sensor module can be configured to have desired parameter so that in array 920a The adjacent FOV of corresponding adjacent pin hole is suitably overlapped.Similarly, adjacent FOVi can also be adjusted to be overlapped or is kept completely separate As discrete FOVi.In the optical sensor module for being designed as that adjacent FOVs is made to overlap each other, in sensitive surface one A little points can have multiple images point.The label can be used for enhancing detection.

In the example of Figure 32, it can be formed on gasket 917, layer of pinholes 920a, protection materials 919a or display surface Or coat filter coating for reducing bias light.As shown, when projecting on bias light 937 to finger tissue 60, short wavelength Component is largely absorbed, and part long wavelength (for example, feux rouges or infrared light) light is transferred to detector 621.Filter coating is available Improve the detection for the return optical signal for carrying finger information in those long wavelength's components of exclusion.

As shown in figure 33 a, each collimator 2001 in collimator array can be along vertically or perpendicular to display surface Axis extension channel.Visual angle adapter optical layer 2210 is used to adjust the visual angle of the detection light returned from display panel, and Between optics collimator 2001 and LCD display panel, to select the angled detection light returned from display panel to enter Optics collimator 2001, while reducing the amount of the detection light perpendicular to display panel and into the return of optics collimator 2001.

Figure 33 B shows the more details of visual angle adapter optical layer 3210 and main detection optical path.For example, visual angle adapter Optical layer 3210 may be implemented as diffraction pattern pattern layer, such as prism structure 3210a.Only there is appropriate incidence from finger Detection the light 82a and 82b of angle and the return reflected from display panel can be just bent across collimator 2001.In contrast, it hangs down Directly it is oriented to by visual angle adapter optical layer 2210 far from perpendicular to the first of display panel in the detection light of the return of display panel Beginning direction, and the off-axis incident light therefore become to optics collimator 2001.Which reduce perpendicular to display panel and can be into Enter the amount of the detection light of the return of optics collimator 2001.

Behind appropriate adjustment visual angle, the reception light from fingerprint valley different location 63a and 63b carries finger print information.For example, Under equal illumination, due to the different fingerprint profiles at visual angle and finger tip skin, light 82a may be stronger than light 82b.It is this design so that Optical sensor module obtains a degree of fingerprint shade.This arrangement improves detection of finger when dry.

When designing the optical sensor module under LCD display module, it should by the various technical characteristics of LCD display module Or performance considers and brings into whole optical sensor module design, to improve optical sensor operation.Following description Several design examples.

A common part in various LCD display modules is light diffuser, can be incident light being diffused into difference Direction is to realize the thin slice of the spatially uniform at big visual angle and display.However, the presence of the LCD diffusing layer may reduce LCD The optical detection of optical sensor module under screen.

Figure 34 A and 34B show the LCD optical diffusion layer between LCD ducting layer 433c and other LCD layers 433a 433b.In some LCD components, cover-plate glass layer 431 can be separated by a distance with following diffusion disk 433b (for example, In some LCD devices, several millimeters), and optics collimator array 617 is separated by light guiding plate 433c with diffusion disk 433b (it can be secondary micron thickness).Under this configuration, strongly diffusing in diffusion disk 433b can be significantly reduced across LCD display module 433 reaches the signal contrast in the signal light of optical detector array 621.Although LCD diffusing layer 433b's Light diffusion is needed for display operation, but which reduce fingerprint detection performances.

This undesired effect of LCD diffusing layer 433b can be mitigated by using different technologies.Figure 34 A and Two examples are shown in 34B.

Figure 34 A shows an example, wherein can be in the part diffusion disk 433b above optical sensor module Hole 951a is formed in entire diffusion disk 433b in corresponding region or LCD display module, comes from top blind flange glass 431 to improve To the transmission of the light of the return of optical detector array 621.Size, shape and the distribution in hole can be according to specific design requirements To select.For example, pore size can be greater than detection optical wavelength, to avoid strong diffraction.For example, collimator unit aperture can be with It is about 40 microns of diameter, and diffusion disk pore size can be 5 microns, 10 microns, 30 microns, 40 microns or 100 microns etc.. In this design, hole 951a is included in LCD diffusing layer 433b, as each collimator unit establishes optical path.Each collimation The hole of device unit can have one or more holes in diffusion disk, to provide from top blind flange glass 431 to fluorescence detector battle array The desired optical path of column 621.If the hole of collimator unit is discrete and has relatively large pitch (for example, 1mm is left It is right), then the hole in diffusion disk can be drilled out with identical pitch.The inhomogeneities in detection can be calibrated.

Figure 34 B shows another example, and wherein diffusion disk can be configurable to include low diffusion optics brocken spectrum 951b, In in the region above optical sensor module light diffusion it is weaker, to be improved to the optical transport of optical sensor module.It is transparent Spot size, shape and distribution can be needed according to specific design to select.For example, the size in hole can be greater than detection light wave It is long, to avoid strong diffraction, and distribution is put so that each collimator unit has one or more transparent optical paths, to permit Perhaps the return light for passing through LCD display layer from top blind flange glass 431 is effectively received.If collimator unit aperture is discrete And there is coarse pitch (for example, 1mm or so), then the brocken spectrum in diffusion disk can be made with identical pitch.If Diffusion disk is made of the material with roughened surface for carrying out diffraction or diffusion to light, then can be to the rough surface selectively application choosing Material is selected, reduces the diffusion of the original optical of rough surface to provide transparent material.The example of suitable material include epoxy resin, Wax or oil, and these materials can effectively change diffusion.

For given LCD diffusing layer, long wavelength's light source can choose to generate detection light or illumination light, so that being directed to this The diffusing scattering of kind light is weaker, so that more light, which can pass through diffusing layer, reaches optical sensor module.

For another example various LCD display modules include the LCD below LCD ducting layer 433c with reference to Figure 35 A and Figure 35 B In optical reflecting layer or film 433d, not used light is reflected back LCD layer to improve display brightness.However, the optics is anti- The presence for penetrating film 433d can stop most of light to reach the optical sensor module below LCD screen, it is thus possible to refer to optics Line induction has an adverse effect.The optical reflecting layer can be to maintain the required optics under LCD ducting layer anti-in most of positions It penetrates, while the position of optical sensor module allows the mode of desired optical delivery to modify under LCD screen.Some In implementation, the collimator 617 for the optical sensor that can be fixed below LCD screen is to contact reflectance coating 433d.

Figure 34 C is shown for providing another example of transparent light path, which comes from one for guiding Or the light of multiple lighting sources 436, incuded with improving the fingerprint of detection module without obviously being diffused by diffusing layer.For example, hole 969 It is formed in the property of can choose in light-diffusing film 433b, to be improved to the optical transport of optical fingerprint sensor under LCD screen.In order to It avoids influencing display performance, optical path hole can be tilted to keep a degree of light diffusion function in the region in hole 969.This Outside, such hole 969 can be designed as very little, such as 0.3mm or smaller, to further enhance the diffusion of backlight, while still mention For improved optical imagery at optical fingerprint sensor under LCD screen.In some implementations, light path hole can be sky , air is filled, transparent material can also be filled with.

In some designs, light path hole 969 can be not limited to some region, but can be distributed in entire light-diffusing film On 433b, for example, hole 969 can be evenly distributed in entire film 433b.This design eliminates selected aperture 969 in some regions but The undesirable space non-uniform illumination not generated in other regions.In some designs, light path hole 969 can be with space Gradient mode distribution, so that any change of the LCD illumination as caused by hole 969 is progressive and less obvious.

Figure 35 A shows an example, wherein passing through the region of the optical sensor module position in optical reflectance coating In include or form light transmission hole to modify optical reflecting layer, be used for LCD in most of position to allow optical reflectance coating The optical reflection of display, while transparent light path is provided for optics collimator array 617, for receiving from the finger above LCD The light of reflection.Size, shape and the distribution in hole are configurable to meet optical sensor demand.For example, the size in hole can be greater than Optical wavelength is detected, to avoid strong diffraction.For example, collimator unit aperture can be about 40 micron diameters, film perforation ruler is diffused Very little can be 5 microns, 10 microns, 30 microns, 40 microns or 100 microns etc..Each collimator unit hole can be in optical reflection Have one or more holes to provide the required light path for optical sensor in layer.The inhomogeneities in detection can be calibrated. If the aperture of collimator unit is discrete and has coarse pitch (for example, 1mm or so), the hole in reflectance coating can be with phase Same pitch drills.

Figure 35 B shows another example for modifying the optical reflecting layer in LCD, and wherein the optics of optical reflectance coating is anti- The rate of penetrating can be revised as allowing a degree of optical delivery to carry out optical sensor by following optical sensor.Various quotient Industry LCD reflectance coating uses flexible plastic material as substrate, and may be enough will be enough for the light transmission of this plastic material Optical transport to optical sensor module for fingerprint incude.

In the above-mentioned design for LCD diffusing layer and the reflecting layer LCD, hole can be formed in one or more lighting sources In locating region, to allow illumination light that can substantially pass LCD display module layer to reach top blind flange glass, for illuminating Finger carries out optical sensor operation.

In above-mentioned design, optical sensor module is located at the lower section of LCD display module, therefore is located under LCD ducting layer Side, LCD ducting layer are designed to guide the backlight from back light to the display area LCD.As shown in figure 36, from display The backlight of light source 434 (for example, LED) is guided by ducting layer 433c and is diffused by LCD diffusing layer to leave ducting layer 433c, to mention For backlight needed for LCD.Light can uniformly be leaked out from a side of ducting layer 433c, then be diffused by diffusion disk 433b. In some LCD, approximately half of diffused light 957 can be propagated towards collimator 617 and become in optical sensor detection Strong bias light.

One or more additional light sources 436 can be provided to connect optical sensor module, to illuminate finger and incite somebody to action The light for carrying fingerprint pattern information is supplied to the optical sensor module below LCD screen.Due to the position (example of lighting source Such as, beside optical sensor or below the reflectance coating 433d adjacent with optical sensor), the light guide function pair of ducting layer 433c Light from lighting source 436 does not work, and the light from 436 is allowed to reach the top surface of LCD panel more efficiently to shine Bright finger.

In addition, lighting source 436 can be designed as to be different from the LCD display illumination from LCD display backlight light source 434 One or more optical wavelengths of optical wavelength emit illumination.Lighting source 436 can be used for fingerprint induction and other inducing functions.

The illumination light of the above-mentioned one or more optical wavelengths for being used to select the optical wavelength of backlight shown from LCD different Design can be used to reduce power consumption.Fingerprint detection, which is carried out, using display backlight light source needs to open display backlight light source for holding The induction of row optical finger print.Compared with above-mentioned design, this design consumes more power, wherein being used for the illumination light portion of optical sensor Divide ground to be different from the backlight in optical wavelength, optical sensor is allowed to operate without opening LCD backlight.It is above-mentioned to be used to select The design of the illumination light of the one or more optical wavelengths different from the optical wavelength of the LCD backlight shown can be selected neatly Lighting source is to obtain additional advantage.It is, for example, possible to use infrared lights as lighting source 436 so that LCD diffusing layer for IR illumination light is more transparent, to realize the desired more high-transmission of IR illumination light.For another example, it is multiple to provide to can choose lighting source Wavelength is used for other function, such as the induction of anti-fraud living body, heartbeat induction etc..

In optical sensor module under designing LCD screen, the position and spatial distribution that lighting source 436 can be used are come Viewing angle is adjusted, to optimize induction quality.

When optical sensor module is placed below LCD module, additional optical design can be used enhance from The backlight of ducting layer to LCD layer is transmitted, while maintaining to be used for the illumination light of optical sensor to the abundant biography of optical sensor module It is defeated.

It includes that two or more layers carry on the back optical reinforced film that Figure 37, which is shown as a part of LCD layer structure shown in 433a, The example of the enhancing structure of (for example, 433px and 433py).Back optical reinforced film 433px and 433py are formed in optical diffusion layer 433b Top.

In the example of Figure 37 A, each enhancing film 433px and 433py include Polarizing prism structure.Two enhancing films The prism slot direction of 433px and 433py is generally perpendicular to each other a pair of of enhancing film is collectively formed, to be improved to the photograph of LCD panel Optical transmission.However, this function of enhancing film may be to optical fingerprint sensor mould under LCD screen if configuration is inappropriate The optical imagery of block 621U has an adverse effect.

As shown in the example in Figure 37 (B) and Figure 37 (C), additional light source direction of illumination and detector direction of observation can be with Concrete configuration is at along the prism slot direction of enhancing film 433px and 433py, it is not unfavorable to be incuded with reduction enhancing film to optical finger print Imaging.The design is to obtain the clear image that do not perforate in enhancing film.Visual angle φ 1 and light angle φ 2 are answered It is adjusted according to the design of enhancing film.

Example in Figure 37 (D) shows specific the setting of collimator unit 617U and photodetector array unit 621U Meter.Collimator unit 617U is used to provide the imaging function realized by lenticule, pin hole or both combination.By optimizing single inspection It surveys unit design or by using multiple detection units, the relatively large sensing area at photodetector array unit 621U may be implemented Domain.

Figure 38 shows the example of the light waveguide-layer in LCD module comprising the partially transparent portion in detection light path Point, ducting layer is passed through to allow to improve the optical transport of the illumination light for optical sensor.

Figure 39 is shown for the illumination designed for the optical sensor in the optical sensor module under LCD display module The example of light source.In LCD display module, optical reflecting layer is shown by the way that not used backlight is recycled to LCD layer to enhance LCD Show brightness.In this respect, the mechanical defect along the defect of the optical reflectivity of optical reflectance coating, such as in reflectance coating can be led The visible change of LCD display brightness is caused, therefore is undesirable.Figure 39 is shown for reducing in reflecting layer or film defect not The design feature that benefit influences.

It, can be in the reflecting layer at the position of the lighting source 436 of the visible component in illumination light as shown in Figure 39 (A) Micropore 973 is set in 433d.The visible component can be used for providing illumination in the finite region of display to show necessity Text or identification information, without open display backlight.

As shown in Figure 39 (B), another solution is selection lighting source wavelength, is allowed to no longer fall into that be generally in can The service band of the reflectance coating of light-exposed wave band.Lighting source 436 for optical sensor can be in the reflectance spectrum model of reflectance coating Except enclosing, for example, 400nm (such as 380nm) short wavelength range below or beyond red color visible range (such as 780nm, 900nm, 940nm etc.) long wavelength range except, allow illumination light to pass through reflectance coating or layer without in reflectance coating Form hole.

Figure 39 (C) shows another design scheme, and wherein reflectance coating is designed as including being used for optical detection for transmiting The narrowband transmission window 975 of illumination light.For example, this narrow transparent or transmission window in reflectance coating can be in 525nm and 535nm Between.

The portable device or other equipment or system of mobile phone based on optical sensor disclosed herein etc. can To be configured to supply additional operating characteristics.

For example, LCD display panel can be controlled as providing local flash mode by 613 lower section of operation induction region Selected LCD display pixel illuminate fingerprint induction region.This can be mentioned in the optical sensor module under LCD display panel For for example, Fig. 4 A and 4B are based on optical imaging designs or Figure 21 based on the optical imagery for passing through optics collimator array.? In the case where obtaining fingerprint image, incuding LCD display pixel and lighting source in window area can temporarily be opened to generate High intensity illumination is used for the optical sensor of fingerprint, and at the same time opening photoelectric testing sensor array 621 to capture and open photograph The fingerprint image of bright light source synchronous.The time for opening lighting source can be relatively short, but emissive porwer can be set as It is very high.For this purpose, this mode for optical finger print induction is flash mode, enable photoelectric testing sensor array 621 Detect a greater amount of light enough to improve image sensing performance.

Optical sensor disclosed above for incuding optical finger print can be used for capturing the fingerprint image of high quality, with Enable differentiation between the minor change in the capture fingerprint of different time capture.It is worth noting that, when people presses in equipment When pressing finger, due to the variation of pressing force, it may change with the contact of the top touch-surface on display screen.Work as hand When induction region on abutment cover-plate glass, the variation of contact force may cause several examine on optic sensor array The variation of survey: (1) fingerprint deforms, and the variation of (2) contact area, (3) fingerprint ridge is widened, the dynamic of the blood flow of (4) pressurized zone Variation.These variations can be optically trapped and can be used to calculate the corresponding change of touch force.Touch force is sensed as fingerprint Induction increases more multi-functional.

Referring to fig. 40, contact profile area increases with the increase of pressing force, while ridge coining is with the increasing of pressing force Add and expands.On the contrary, contact profile area reduces with the reduction of pressing force, while ridge coining is with the reduction of pressing force And tightens or shrink.Figure 40 shows two different fingerprint patterns of the same finger under different pressing forces: slightly pressing The fingerprint 3303 of fingerprint 2301 and severe pressing.The detection light returned from the selected integrated region 3305 of the fingerprint on touch-surface It can be captured by a part of optical sensor on optic sensor array, the choosing on the partial optical sensor and touch-surface It is corresponding to determine integrated region 3305.As explained further below, the detection signal from those optical sensors is divided Analysis, to extract useful information.

When finger touch sensor surface, finger tissue absorbs optical power, therefore is integrated on photodiode array Reception power reduce.Especially in the case where not incuding the total internal reflection mode of low-index material (water, sweat etc.), lead to The changed power trend that analysis receives is crossed, sensor can be used for having detected whether finger touch sensor or other objects Unexpected touch sensor.Based on this induction process, sensor can determine whether touch is true finger touch, and because This can detect whether to wake up mobile device based on whether touch is real finger pressing.Because detection is based on integrated power Detection, so the light source for optical finger print induction is in battery saving mode.

In detailed fingerprint image, when pressing force increases, fingerprint ridge expands, and by widened fingerprint ridge, is touching It touches interface and absorbs more light.Therefore, in relatively small viewing area 3305, integrated received optical power variation is reflected The variation of pressing force.Based on this, pressure can detecte.

Therefore, changed by analyzing the detection of optical power received integrated in zonule, fingerprint ridge figure can be monitored The time-domain evolution of case deformation.It is then possible to be determined on finger using the information of the time-domain evolution deformed about fingerprint ridge pattern Pressing force time-domain evolution.In the application, the time-domain evolution of the pressing force of the finger of people can be used for the touch by finger To determine whether the dynamic of user's interaction, including determining people press touch-surface or pressing finger is removed touch-surface.These User's interaction dynamic can be used for triggering the operation of certain applications in the certain operations or mobile device of mobile device.Example Such as, it is the intended touch for operating mobile device that the time-domain evolution of the pressing force of the finger of people, which is determined for the touch of people, Or it is unexpected to be not intended to touch, and based on such determination, mobile device control system may determine whether to wake up sleep mould Mobile device in formula.

In addition, the living person's finger contacted with touch-surface can be in two different detection light waves under different pressing forces Different characteristics is shown in terms of the extinction ratio that strong point obtains, as Figure 14 and 15 is explained.Referring back to Figure 40, the finger that slightly presses Line 3301 can indistinctively limit the blood for flowing into the pressing part of finger, and therefore generate two that instruction living person organizes not The extinction ratio obtained with detection light wave strong point.When people exerts oneself to press fingerprint 3303 of the finger to generate severe pressing, flow direction is pressed The blood of pressure finger part may be reduced seriously, and the corresponding delustring therefore obtained under two different detection optical wavelength Than the extinction ratio that will differ from the fingerprint 3301 of slight pressing.Therefore, the extinction ratio obtained under two kinds of different detection optical wavelength Change with different pressing forces and different blood flow conditions.This variation and the vacation fingerprint pattern according to made of artificial material The extinction ratio obtained under two kinds of different detection optical wavelength when being pressed using different power is different.

And hence it is also possible to determine that touch is from the user using the extinction ratio obtained under two different detection optical wavelength Finger or other objects.This determination is also used in determining whether to wake up the mobile device in sleep pattern.

For another example, disclosed optical sensor technology can be used for monitoring natural mobile or movement of living person's finger due to people (intentional or unintentional) or when blood flows through human body pulse relevant to heartbeat and tend to performance proper motion.Wake up behaviour Work or user authentication can be based on the optical sensors of fingerprint pattern and there are the positive determined combination of living person enhances access control System.For another example, optical sensor module may include for based on the optical sensor in the light from finger or the return of palm come Measure the inducing function of glucose level or oxygen saturation.As another example, when people's touch display screen curtain, touch force Variation can reflect in one or more ways, including the contact area between fingerprint pattern deformation, finger and screen surface Variation, fingerprint ridge broadens or the dynamic change of blood flow.These and other variations can be based on disclosed optical sensor technology It is measured by optical sensor, and can be used to calculate touch force.In addition to fingerprint induction, this touch force induction can be used for It is added for optical sensor module more multi-functional.

Although this patent document includes many details, these are not necessarily to be construed as to any invention or claimed The limitation of range, but be interpreted to can be the description of feature specific to the specific embodiment to specific invention.This patent Certain features described in file can also combine realization in a single embodiment in the context of separate embodiments.On the contrary, The various features described in the context of single embodiment can also be implemented separately in various embodiments or with any suitable Sub-portfolio form realize.Although working in certain combinations moreover, feature can be described above as, and even initially It is so claimed, but can be deleted from combination in some cases from claimed combined one or more features It removes, and claimed combination can be related to the deformation of sub-portfolio or sub-portfolio.

Similarly, although describing operation in the accompanying drawings with particular order, this should not be construed as requiring these operations The particular order shown in successively executes in sequence, or require execute it is all shown in operate, to realize desired knot Fruit.Moreover, the various individual system units in the embodiment described in this patent document should not be construed as in all implementations This separation is needed in example.

This patent document only describes several realizations and example, and can be based on described and illustrated in this patent document Content is realized, enhances and is changed to make other.

Claims

1. the electronic equipment that one kind can detect fingerprint by optical sensor, comprising:

Liquid crystal display LCD screen, provide touch sensible operation and including LCD display panel structure, to show image；

Top clear is formed on the device screen, as the user's touch interface operated for the touch sensible And as being used for transmission the light from the display panel structure so that image to be shown to the interface of user；And

Optical sensor module is located at below the display panel structure, is examined with receiving the detection light across the LCD screen Survey fingerprint, wherein the optical sensor module include receive it is described detection light optics collimator optics collimator array, And receive the optic sensor array of the optical sensor of the detection light from the optics collimator array.

2. equipment as described in claim 1, in which:

The top clear includes being touched for user with finger to carry out the specified fingerprint induction region of fingerprint induction；

The optical sensor module below the display panel structure includes the transparent block contacted with panel substrate, institute It states transparent block and receives light that is from the LCD display panel structure and returning from the top clear, wherein the optics Sensor module is placed relative to the specified fingerprint induction region, and is configured to: when the skin contact with people, being led to It crosses the optics collimator and selectively receives the light returned from the top surface of the top clear.

3. equipment as described in claim 2, in which:

The LCD display panel structure includes the optical diffusion layer diffused to light, and the optical diffusion layer includes being located at institute The hole above optical sensor module at selection area is stated, to allow optical transport to the optical sensor module.

4. equipment as described in claim 2, in which:

The LCD display panel structure includes the optical diffusion layer diffused to light, and the optical diffusion layer includes being located at institute State the selection area diffused to light above optical sensor module, the selection area optical diffusion layer other Part allows some light to reach the optical sensor module by transmission.

5. equipment as described in claim 1, comprising:

LCD illumination light source provides the backlight of the LCD display panel structure, for showing image；

Optical reflecting layer is formed in the bottom section of the LCD display panel, with reflected light to the LCD display panel structure；

Hole is formed in the selection area above the optical sensor module, to allow optical transport to the optical sensor Module.

6. equipment as described in claim 1, comprising:

Optical reflecting layer is formed in the bottom section of the LCD display panel, with reflected light to the LCD display panel structure, Wherein the optical reflecting layer includes the selection area above the optical sensor module, to allow optical transport described in Optical sensor module.

7. equipment as described in claim 1, comprising:

One or more probe sources are formed in below the LCD display panel structure, project the detection light across described LCD display panel structure, with the object or finger for illuminating the top of the LCD display panel structure or being contacted with top surface, in turn The detection light of reflection is directed toward the optical sensor module；And

Equipment electronic control module is coupled to the display panel structure, to provide electricity to one or more of probe sources Source, and the power supply of one or more of probe sources is closed in a sleep mode, and

Wherein, when the optical sensor module detects people's at the specified fingerprint induction region of the top clear Skin there are when, the equipment electronic control module is used for the LCD display panel structure from the sleep mode wakeup.

8. equipment as described in claim 7, in which:

When the LCD display panel structure is in the sleep pattern, the equipment electronic control module is for operating one Or multiple probe sources intermittently issue the detection light, simultaneously close off the power supply of the LCD display panel structure, and interval is sent out The detection light out is directed toward the specified fingerprint induction region of the top clear, with monitor whether exist with it is described Skin that specified fingerprint induction region contacts, for the people by the equipment from the sleep mode wakeup.

9. equipment as described in claim 8, in which:

One or more of probe sources issue black light.

10. equipment as described in claim 1, further includes:

Equipment electronic control module, wherein if the fingerprint matching of the fingerprint and authorized user that detect, the equipment electronics control Molding block authorized user accesses the equipment.

11. equipment as described in claim 10, in which:

The optical sensor module is in addition to for other than detecting fingerprint, being also used to detect the life for being different from fingerprint by optical sensor Object characteristic parameter, to show whether touch associated with the fingerprint detected comes from living person at the top clear, with And

If the biological characteristic parameter table that the fingerprint matching of the fingerprint and authorized user that (1) detect and (2) detect For the bright fingerprint detected from living person, the equipment electronic control module accesses the equipment for authorized user.

12. equipment as described in claim 11, in which:

The biological characteristic parameter includes heartbeat.

13. equipment as described in claim 11 further includes biochemical characterization sensor, the biochemical characterization sensor with it is described Optical sensor module separation, and detect be different from fingerprint biological characteristic parameter, with show at the top clear with Whether associated touch of the fingerprint detected comes from living person, and

14. equipment as described in claim 1, comprising:

Equipment electronic control module is coupled to the optical sensor module, is obtained with reception by the touch of finger sensing The information of multiple fingerprints detected, wherein the equipment electronic control module measures the variation of the multiple fingerprint detected And determine the touch force for the variation for causing to measure.

15. equipment as described in claim 14, in which:

It is described to change the variation for including the fingerprint image due to caused by the touch force, the Petting Area due to caused by the touch force The variation of the spacing of the variation or fingerprint ridge in domain.

16. equipment as described in claim 1, wherein the equipment is smart phone.

17. equipment as described in claim 1, wherein the equipment is portable device.

18. equipment as described in claim 1, wherein the optics collimator comes from the LCD display panel for collecting The light of the return of structure, and the light of the different location in the top clear is separated, while returning collection The light returned is directed toward the optic sensor array.

19. equipment as described in claim 1, in which:

The optics collimator includes substrate, and the substrate has the optics collimator as described in being formed in the substrate Through-hole array.

20. equipment as described in claim 1, in which:

The optics collimator includes optical waveguide array or fiber array.

21. equipment as described in claim 1, in which:

The optics collimator includes the microlens array of lenticule composition, and the light that receives of each micro lens without Light imaging to receiving.

22. the equipment as described in claim 21, in which:

The optical sensor module includes optical filter array, and the optical filter array is by space layout to match The lenticule of microlens array is stated, each lenticule corresponds to an optical filter, and

The optical filter filtering reaches the light of the optic sensor array.

23. the equipment as described in claim 22, in which:

The optical sensor module includes the shared optically filtering layer of the optics collimator, reaches the optics with filtering and passes The light of sensor array.

24. equipment as described in claim 1, in which:

Each optics collimator is configured to transmit light in the direction of the axis along or close to the optics collimator, stops simultaneously The light in other directions, and there is small transmission numerical aperture to realize high-space resolution by the optics collimator array Rate.

25. equipment as described in claim 1, in which:

The LCD screen includes optical diffusion layer, and the optical diffusion layer is configured to include the selection area with light transmission path, To allow the reflected light of the top clear above the LCD screen to reach the optical sensor mould by transmission Block.

26. equipment as described in claim 1, in which:

The LCD display panel structure includes LCD illumination light source, to provide the backlight for arriving the LCD display panel structure, is used for Show image；And

One or more probe sources are formed in below the LCD display panel structure, project the detection light across described LCD display panel structure, the fingerprint induction region on top surface to illuminate the top clear, fingerprint induction region difference In peripheral region, optical finger print induction is carried out for placing finger.

27. the equipment as described in claim 26, in which:

The LCD display panel structure includes that one or more backlights enhance film layer, and each backlight enhancing film layer includes having phase The mutually optical polarization prism structure of two groups of vertical prism slots；And

The optical sensor module below one or more of probe sources and the LCD display panel structure is by cloth It sets, so that the optical sensor module is received by one or more of probe sources in the side different from the direction of prism slot Reflection that is generating upwards and reflecting from the top clear detects light.

28. the electronic equipment that one kind can detect fingerprint by optical sensor, comprising:

LCD backlight optical module is coupled to the LCD screen to generate the backlight of the LCD screen, for showing image；

Top clear is formed on the device screen, as the user's touch interface operated for the touch sensible And as being used for transmission the light from the display panel structure so that image to be shown to the interface of user；

Optical sensor module is located at below the LCD display panel structure, with receive it is being reflected from the top clear and Fingerprint is detected across the detection light of the LCD screen；

One or more probe sources are separated with the LCD backlight optical module, are located at below the LCD display panel structure, with The detection light across the LCD display panel structure is generated, and then illuminates the specified fingerprint in the top clear Induction region, the fingerprint induction region are visually distinct from the peripheral region of the top clear, place finger for user Carry out optical finger print induction；And

Device control module is coupled to the optical sensor module, and handles the output of the optical sensor module, with true Surely the fingerprint detected by the optical sensor module whether the fingerprint matching with authorized user, and in addition to referring to for detecting Outside line, the biological characteristic parameter of fingerprint is also different from by optical sensor detection, to show at the top clear and examine Whether associated touch of the fingerprint measured comes from living person.

29. equipment as claimed in claim 28, in which:

One or more of probe sources generate the detection light of different optical wavelengths, so that the optical sensor module The object by contacting with the specified fingerprint induction region in the top clear is captured in the different optical wavelengths The optical characteristics of the reflection detection light at place, and

The device control module can be operated to handle by the detection light of the object reflection in the different optical wavelengths Middle captured optical characteristics, with the determination object whether be living person finger.

30. equipment as claimed in claim 28, in which:

31. equipment as claimed in claim 28, in which:

32. equipment as claimed in claim 28, comprising:

Hole is formed in above the optical sensor module in selection area, to allow optical transport to the optical sensor mould Block.

33. equipment as claimed in claim 28, in which:

When the LCD display panel structure is in the sleep pattern, the device control module is one for operating Or multiple probe sources intermittently issue the detection light, simultaneously close off the power supply of the LCD display panel structure, and interval is sent out The detection light out is directed toward the specified fingerprint induction region of the top clear, with monitor whether exist with it is described Skin that specified fingerprint induction region contacts, for the people by the equipment from the sleep mode wakeup.

34. equipment as claimed in claim 28, in which:

The device control module is coupled to the optical sensor module, is obtained with reception by the touch of finger sensing The information of multiple fingerprints detected, and the device control module measures the variation of the multiple fingerprint detected and true Surely cause the touch force of the variation measured.

35. the equipment as described in claim 34, in which:

36. equipment as claimed in claim 28, in which:

The optical sensor module includes receiving the optics collimator array of the optics collimator of the detection light and receiving The optic sensor array of the optical sensor of the detection light from the optics collimator array；And

37. equipment as claimed in claim 28, in which:

The optics collimator includes optical waveguide array or fiber array.

38. equipment as claimed in claim 28, in which:

The optics collimator includes the microlens array of lenticule composition, and the light that receives of each micro lens without To the light imaging received.

39. equipment as claimed in claim 28, in which:

The LCD screen includes optical diffusion layer, is configured to include the selection area with light transmission path, to allow from institute The reflected light pass for stating the top clear above LCD screen passes through the optical sensor module.

40. equipment as claimed in claim 28, in which:

The optical sensor module below one or more of probe sources and the LCD display panel structure is arranged So that the optical sensor module receive reflected from the top clear and by one or more of probe sources with The detection light of the reflection generated on the different direction in the direction of prism slot.

41. the electronic equipment that one kind can detect fingerprint by optical sensor, comprising:

LCD backlight optical module is coupled to the LCD screen to generate the backlight of the LCD screen, to show image；

Top clear is formed on the LCD screen, simultaneously as the user's touch interface operated for the touch sensible And as being used for transmission the light from the display panel structure so that image to be shown to the interface of user；

Optical sensor module is located at below the LCD panel construction, is examined with receiving the light returned from the top clear Fingerprint is surveyed, the optical sensor module includes transparent block, and the transparent block is contacted with the panel substrate, is come to receive It further include receiving the optic sensor array of the light and by the transparent block from the light of the display panel structure In the light that receives be imaged onto the optical imagery module on the optic sensor array；And

One or more probe sources are separated with the LCD backlight optical module, are located at below the LCD display panel structure, with The detection light across the LCD display panel structure is generated, and then illuminates the specified fingerprint in the top clear Induction region, the fingerprint induction region are visually distinct from the peripheral region of the top clear, place finger for user Carry out optical finger print induction.

42. the equipment as described in claim 41, wherein the optical imagery module includes lens, the lens will be described The light received in bright piece is imaged onto the optic sensor array.