CN110502177A - A kind of unlocking screen method and apparatus of synchronous verifying finger print information - Google Patents

A kind of unlocking screen method and apparatus of synchronous verifying finger print information Download PDF

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Publication number
CN110502177A
CN110502177A CN201810475509.XA CN201810475509A CN110502177A CN 110502177 A CN110502177 A CN 110502177A CN 201810475509 A CN201810475509 A CN 201810475509A CN 110502177 A CN110502177 A CN 110502177A
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reflected light
print information
finger print
light signal
optical
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CN110502177B (en
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黄建东
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Shanghai Ploughed Rock Intelligent Technology Co Ltd
Shanghai Harvest Intelligence Tech Co Ltd
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Shanghai Ploughed Rock Intelligent Technology Co Ltd
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Priority to CN202110540508.0A priority Critical patent/CN113535049A/en
Priority to CN201810475509.XA priority patent/CN110502177B/en
Priority to PCT/CN2019/087275 priority patent/WO2019219061A1/en
Priority to TW110145946A priority patent/TWI790848B/en
Priority to TW108117060A priority patent/TWI750473B/en
Publication of CN110502177A publication Critical patent/CN110502177A/en
Priority to US17/099,544 priority patent/US20210073506A1/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/316—User authentication by observing the pattern of computer usage, e.g. typical user behaviour
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • G06F3/04847—Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • G06F3/0485—Scrolling or panning
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures

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Abstract

The present invention provides a kind of unlocking screen method and apparatus of synchronous verifying finger print information, the method is applied to the device of the unlocking screen of synchronous verifying finger print information, described device includes display unit and sensing unit, fingerprint identification area is provided on the display unit, the sensing unit is located at the lower section of the fingerprint identification area, for obtaining the finger print information in fingerprint identification area；It the described method comprises the following steps: receiving sliding trace of the user in the fingerprint identification area, the corresponding finger print information of synchronous acquisition user's finger；When detecting that sliding trace of the user in the fingerprint identification area and default sliding trace match, judge whether the finger print information of synchronous acquisition matches with preset fingerprint information, if then completing unlocking screen, otherwise unlocking screen fails.In this way, effectively improving the safety of unlocking screen, and enhance user's operation experience.

Description

A kind of unlocking screen method and apparatus of synchronous verifying finger print information
Technical field
The present invention relates to field of electronic device, in particular to a kind of the unlocking screen method and dress of synchronous verifying finger print information It sets.
Background technique
With the development of science and technology with the progress of technology, touch-control display panel, which has been widely used in, to need to carry out human-computer interaction In the device of interface, such as the Touch Screen of the operation display of industrial computer, tablet computer, smart phone.Due to this A little devices are in use usually along with a large amount of user information, thus the protection of user information safety just seems especially heavy It wants.In numerous information safety protection modes, fingerprint recognition encryption is important one therein.
Currently, the booting unlock of electronic equipment generally includes both screen sliding unlock and unlocked by fingerprint mode.Screen sliding unlocks It is compared by the sliding trace for inputting user with pre-set sliding trace, completes electronic equipment solution if matching Lock due to screen sliding unlocking manner and is not introduced into the identification of user's physiological characteristic information, and there is biggish security risks.Unlocked by fingerprint It is that current collected user fingerprints information is compared with the finger print information being stored in advance, completes electricity if the two matching Sub- equipment unlock, for screen sliding unlock, the mode safety of unlocked by fingerprint is greatly improved.
However, current display panel technology, whether liquid crystal display (LCD), Active Phased Array column organic light-emitting diodes (AMOLED) display screen or micro- light emitting diode (micro-LED) display screen are managed, is swept with thin-film electro crystalline substance pipe (TFT) structure Single pixel is retouched and drives, to realize the display function of on-screen pixels array.The primary structure for forming TFT switch function is partly to lead Body field-effect transistor (FET), wherein known to semiconductor layer main material have amorphous silicon, polysilicon, indium gallium zinc (IGZO), Or organic compound for being mixed with carbon nanomaterial etc..Since the structure of light detecting diode (Photo Diode) can also adopt It is prepared with such semiconductor material, and production equipment is also compatible with the production equipment in tft array, prepared photodiode is again Can be directly integrated with TFT and photodiode be scanned with TFT realization and driving function, therefore TFT light is detected in recent years Diode starts to produce with tft array preparation method, and is widely used in X-ray sensing flat device, such as Chinese people's republicanism Described by state's patent CN103829959B, CN102903721B.
Compared to the image sensing device of traditional crystalline material preparation, the light of above-mentioned TFT light detecting array film material is prohibited Bandwidth (Band gap) forms noise compared with the interference vulnerable to ambient visible light all using visible light as dominant absorption ranges, Cause signal noise ratio (SNR) lower.It is limited to this, the application at TFT light sensing array initial stage is sensing flat device with X-ray Based on, main cause is X-ray category short-wavelength light and collimation is high, and X-ray image is first incident on sensing plate and configures it Optical wavelength conversion material directly detects the visible light of X-ray image conversion longer wavelength in sensing plate internal transmission to TFT light again It surveys on array film, the visible light for avoiding ambient enviroment forms noise jamming, such as above-mentioned People's Republic of China's patent Described by CN103829959B, CN102903721B.
If the detecting array film configuration of TFT visible light known to will be such can be used as in display screen structure and detect light Function is integrated in a kind of implementation of display screen.However be limited to thickness and the display pixel hatch bore diameter of display screen etc. because The real image of element, light detecting diode array sensing has been the image that the optical distortions such as diffraction occur, and because optical signalling is worn Saturating display screen multilayered structure, and in optical display signal, touch-sensing signal and in the case where deposit, it is intended to from low signal-to-noise ratio scene It extracts useful optical signalling and has very high degree of difficulty, technical difficulty grade reaches the degree of intimate single photon image, it is necessary to borrow Raw video can be parsed according to wave theory of light operation reconstruction by related algorithm.In order to avoid this technological difficulties, it is known can Light-exposed colorimetric sensor films configuration may require that additional optical enhancement device in former display screen structure, or only that optical sensor is thin Film configures in display screen side, carries out optical image reconstruction using the light that non-perpendicular reflection reaches side, such as: the Chinese people Described in republic patent CN101359369B.However although such technology can avoid the technological difficulties of dim light imaging, it is additional Optical device increases the thickness of light detecting significant screen, and the configuration mode in significant screen side is then unable to satisfy the full frame body of user It tests.
It is realized in short, current electronic equipment is still the acquisition of user fingerprints information by respective sensor, Finger can only be placed on the specific position (such as iPhone HOME key) except screen by user, so as to user fingerprints information energy Enough to be acquired by the sensor of lower section, operating position is fixed, and user's sensory experience is poor.
In conclusion one kind is provided while user carries out screen sliding unlock, synchronous progress user fingerprints information certification Unlocking screen scheme just seems particularly necessary.
Summary of the invention
For this reason, it may be necessary to a kind of technical solution of the unlocking screen of synchronous verifying finger print information is provided, it is existing for solving The problems such as that there is safeties is not high for unlocking screen mode, user's operation space is limited, experience difference.
To achieve the above object, a kind of unlocking screen method of synchronous verifying finger print information, the side are inventor provided Method is applied to the device of the unlocking screen of synchronous verifying finger print information, and described device includes display unit and sensing unit, described Fingerprint identification area is provided on display unit, the sensing unit is located at the lower section of the fingerprint identification area, for obtaining fingerprint Finger print information on cog region；It the described method comprises the following steps:
Receive sliding trace of the user in the fingerprint identification area, the corresponding finger print information of synchronous acquisition user's finger；
When detecting that sliding trace of the user in the fingerprint identification area and default sliding trace match, judgement is same Whether the finger print information of step acquisition matches with preset fingerprint information, if then completing unlocking screen, otherwise unlocking screen fails.
Further, the sensing unit is that light detects array film, and the light detecting array film includes PxQ pixel Detection region, each pixel detection region are correspondingly arranged a pixel detecting structure, and each pixel detecting structure includes more than one film Pixel thin film circuit and a smooth detecting unit are used for for one group composed by electric brilliant pipe；The smooth detecting unit includes photosensitive two pole Pipe or the brilliant pipe of photosensitive electricity.
Further, the light detecting film is that photodiode is formed by array, and the photodiode includes light Quick diode induction zone is provided with photodiode layer in the photodiode induction zone, and the photodiode layer includes p Type semiconductor layer, i-type semiconductor layer, n-type semiconductor layer, p-type semiconductor layer, i-type semiconductor layer, n-type semiconductor layer from upper and Lower stacking setting, the i-type semiconductor layer are microcrystal silicon structure or noncrystalline silication germanium junction structure.
Further, the light detecting film is that the brilliant pipe of photosensitive electricity is formed by array, and the photosensitive brilliant pipe of electricity includes light The quick brilliant pipe induction zone of electricity, the photosensitive brilliant pipe induction zone of electricity are provided with photoconductive film transistor, the photoconductive film transistor packet Include grid, source electrode, drain electrode, insulating layer, light absorption semiconductor layer；The photoconductive film transistor is coplanar formula structure of standing upside down, The coplanar formula structure of standing upside down includes: that the grid, insulating layer, source electrode are longitudinally arranged from bottom to top, the drain electrode with it is described Source electrode is laterally coplanar with；Insulating layer wraps up the grid, so that not contacting between grid and source electrode, grid and drain electrode； Clearance fit between source electrode and drain electrode forms photosensitive leakage currents channel, the light absorption semiconductor between source electrode and drain electrode transverse direction Layer is set in photosensitive leakage currents channel.
Further, the fingerprint identification area includes multiple fingerprint recognition subregions, under each fingerprint recognition subregion Side is correspondingly arranged a sensing unit；The described method includes:
Enabled instruction of the user to fingerprint recognition subregion is received, the sensing of the lower section of the fingerprint recognition subregion is opened Unit；
Alternatively, receiving out code of the user to fingerprint recognition subregion, the lower section of the fingerprint recognition subregion is closed Sensing unit.
Further, the display unit is self-luminous diode (OLED) display screen, and described device further includes cover-plate glass, touches Screen, optical cement, optical device；
The cover-plate glass, touch screen, self-luminous diode (OLED) display screen, optical cement, optical device, sensing unit from upper and Lower setting；The touch screen fits in the lower surface of cover-plate glass, and the optical cement fits in self-luminous diode (OLED) display screen Lower surface；The refractive index of the optical cement is less than the refractive index of cover-plate glass, and the self-luminous diode (OLED) display screen includes multiple Display pixel；Described device further includes processor；
The sliding trace that user is received in the fingerprint identification area, the corresponding fingerprint letter of synchronous acquisition user's finger Breath includes:
Processor sends display drive signals to two pole of self-luminous when touch screen detects the touching signals of user's finger Tube display screen；
Display pixel issues optical signal, the optical signal is in cover-plate glass when receiving processor display drive signals Upper surface reflect, formed reflected light signal；
Optical cement changes the optical path of reflected light signal, critical to being greater than first in the incidence angle of optical cement in reflected light signal The reflected light signal at angle is filtered, and obtains the first reflected light signal, and the first reflected light signal is made to enter optical device；Institute Stating first critical angle is that reflected light signal can be in the critical angle that optical cement surface is totally reflected；
Optical device changes the optical path of the first reflected light signal, enters in the first reflected light signal in surface optical device The first reflected light signal that firing angle is less than first critical angle is filtered, and obtains the second reflected light signal, and is made second reflective Signal enters sensing unit with the incidence angle for being less than predetermined angle；The second critical angle is that reflected light signal can be in cover board glass The critical angle that glass upper surface is totally reflected；
Processor generates finger print information according to received second reflected light signal of sensing unit and exports.
Further, the self-luminous diode (OLED) display screen includes MxN display pixel；The described method includes:
Processor successively drives single display pixel or display pixel array on display screen to send out according to default timing electric signal Optical signals form reflected light letter to form luminous point or luminous point array sweeping user's finger position in the upper surface of cover-plate glass Number.
Inventor additionally provides a kind of screen unlocking device of synchronous verifying finger print information, and described device includes that display is single Member, sensing unit, processor and computer program are provided with fingerprint identification area, the sensing unit position on the display unit In the lower section of the fingerprint identification area, for obtaining the finger print information in fingerprint identification area；
The sensing unit is for receiving sliding trace of the user in the fingerprint identification area, synchronous acquisition user's finger Corresponding finger print information；
The computer program performs the steps of when being executed by processor
When detecting that sliding trace of the user in the fingerprint identification area and default sliding trace match, judgement is same Whether the finger print information of step acquisition matches with preset fingerprint information, if then completing unlocking screen, otherwise unlocking screen fails.
Further, the display unit is self-luminous diode (OLED) display screen, and described device further includes cover-plate glass, touches Screen, optical cement, optical device；
The cover-plate glass, touch screen, self-luminous diode (OLED) display screen, optical cement, optical device, sensing unit from upper and Lower setting；The touch screen fits in the lower surface of cover-plate glass, and the optical cement fits in self-luminous diode (OLED) display screen Lower surface；The refractive index of the optical cement is less than the refractive index of cover-plate glass, and the self-luminous diode (OLED) display screen includes multiple Display pixel；
The processor is used for when touch screen detects the touching signals of user's finger, sends display drive signals to certainly Light emitting diode (LED) display screen；
The display pixel is used for when receiving processor display drive signals, issues optical signal, and the optical signal exists The upper surface of cover-plate glass is reflected, and reflected light signal is formed；
The optical cement is greater than the incidence angle in reflected light signal in optical cement for changing the optical path of reflected light signal The reflected light signal of first critical angle is filtered, and obtains the first reflected light signal, so that the first reflected light signal enters optics Device；The first critical angle is that reflected light signal can be in the critical angle that optical cement surface is totally reflected；
The optical device for changing the first reflected light signal optical path, in the first reflected light signal in optical device The first reflected light signal that the incidence angle on surface is less than first critical angle is filtered, and obtains the second reflected light signal, and make Second reflected light signal enters sensing unit with the incidence angle for being less than predetermined angle；The second critical angle is reflected light signal energy Enough critical angles being totally reflected in cover-plate glass upper surface；
The processor is used to generate finger print information according to received second reflected light signal of sensing unit and export.
Further, the optical device includes light shading type optical device and phase change formula optical device, the shading Formula optical device includes periodical pinhole array or aperiodicity pinhole array, the phase change formula optical device include Refractive index is in periodically variable photon crystal structure or microlens array structure or refractive index in the unrestrained of aperiodicity change Diffusing structure.
It is different from the prior art, the unlocking screen method and dress of synchronous verifying finger print information described in above-mentioned technical proposal It sets, the method is applied to the device of the unlocking screen of synchronous verifying finger print information, and described device includes display unit and sensing Unit is provided with fingerprint identification area on the display unit, and the sensing unit is located at the lower section of the fingerprint identification area, is used for Obtain the finger print information in fingerprint identification area；It the described method comprises the following steps: receiving user in the fingerprint identification area Sliding trace, the corresponding finger print information of synchronous acquisition user's finger；When detecting sliding of the user in the fingerprint identification area When track and default sliding trace match, judge whether the finger print information of synchronous acquisition matches with preset fingerprint information, if Unlocking screen is then completed, otherwise unlocking screen fails.In this way, synchronous progress user refers to when user carries out screen sliding unlock operation The acquisition and certification of line information, on the one hand effectively improve the safety of unlocking screen, another party by the way of double authentication Face user is not necessarily to carry out operating the acquisition that finger print information can be realized in specific keys, effectively improves user experience.
Detailed description of the invention
Fig. 1 is the schematic diagram that the light that one embodiment of the invention is related to detects array film application structure；
Fig. 2 is the schematic diagram of the display pixel for the self-luminous diode (OLED) display screen that one embodiment of the invention is related to；
Fig. 3 is the optical path change schematic diagram for the single display pixel light emission reflection that one embodiment of the invention is related to；
Fig. 4 is the optical path change of single display pixel light emission reflection after the setting optical cement that one embodiment of the invention is related to Schematic diagram；
Fig. 5 is single display pixel light emission reflection after the setting optical cement and optical device that one embodiment of the invention is related to Optical path change schematic diagram；
Fig. 6 is the schematic diagram for the corresponding effective light emitting region of single display pixel that one embodiment of the invention is related to；
Fig. 7 is the structural representation of the screen unlocking device for the synchronous verifying finger print information that one embodiment of the invention is related to Figure；
Fig. 8 is the flow chart for the acquisition finger print information method that one embodiment of the invention is related to；
Fig. 9 is the structural schematic diagram for the light detecting unit that one embodiment of the invention is related to；
Figure 10 is the structural schematic diagram for the light detecting unit that another embodiment of the present invention is related to；
Figure 11 is the structural schematic diagram for the source electrode and drain electrode that another embodiment of the present invention is related to；
Figure 12 is the preparation flow figure for the light detecting unit that another embodiment of the present invention is related to；
Figure 13 is the flow chart of the unlocking screen method for the synchronous verifying finger print information that one embodiment of the invention is related to.
Appended drawing reference:
1, cover-plate glass/touch screen；
2, self-luminous diode (OLED) display screen；21, display pixel；
3, light detects array film；31, light sensitive pixels；
4, optical cement；
5, optical device；
101, grid；102, source electrode；103, it drains；104, insulating layer；105, light absorption semiconductor layer.
Specific embodiment
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality It applies example and attached drawing is cooperated to be explained in detail.
As shown in figure 13, the stream of the unlocking screen method for the synchronous verifying finger print information being related to for one embodiment of the invention Cheng Tu.The method is applied to the device of the unlocking screen of synchronous verifying finger print information, and described device includes display unit and biography Feel unit.Described device is the electronic equipment with touch display screen, the intelligence such as mobile phone in this way, tablet computer, personal digital assistant Energy mobile device, can also be the electronic equipments such as personal computer, industrial equipment computer.
Fingerprint identification area is provided on the display unit, the sensing unit is located at the lower section of the fingerprint identification area, For obtaining the finger print information in fingerprint identification area.The display unit is driving using active array thin film transistor (TFT) as scanning The dynamic display screen with transmission data, including AMOLED display screen, LCD liquid crystal display screen, micro- light emitting diode (LED) display screen, quantum dot Display screen or electric ink display screen.
In the present embodiment, the range of the covering of sensing unit is adapted with the size of touching display screen, in this way can be with So that no matter how user's finger is slided on a display screen, sensing unit can capture the finger print information of user.The cunning Dynamic rail mark is the motion profile of user's finger on the display unit, can be and singly refers to operation, is also possible to multifingered manipulation.User hand The motion profile of finger includes but is not limited to lines, figure, Chinese character etc..When sliding trace is that user is operated by multiple fingers When, if multiple fingers are in fingerprint identification area simultaneously in sliding process, sensing unit can be to the corresponding finger of these fingers Line information is acquired.
In further embodiments, sensing unit can also be multiple, only need to meet multiple sensing units and be spliced into and show The lower section for showing the compatible size of unit, being placed in display unit.Compared to the sensing unit of large area, small area is more It is easy production and processing, is conducive to save production cost in this way.
In further embodiments, it is preferred that fingerprint identification area can also be one piece of region less than display screen size, example Such as account for the 1/2 or 1/4 of display screen entirety size, it is preferred that the shape of fingerprint identification area is rectangle, and the size of rectangle is located at display The size at the center of unit, sensing unit is adapted with fingerprint identification area size.In this embodiment, when user's finger is aobvious In display screen in sliding process, if finger is located at except fingerprint identification area, finger print information will not be identified, because of fingerprint identification area Except region and not set sensing unit；When user's finger slides into fingerprint identification area, sensing unit will be to user's Finger print information is captured.It, can be with compared to the mode of full frame covering since sensing unit only accounts for the area of display unit Effectively save production cost.
It the described method comprises the following steps:
It initially enters step S1301 and receives sliding trace of the user in the fingerprint identification area, synchronous acquisition user hand Refer to corresponding finger print information.
In certain embodiments, the display unit includes touch control unit；The step " it is single in display to receive user's finger Sliding trace in member " includes: that sensing unit or touch control unit receive the sliding trace of user's finger on the display unit, is generated Sliding trace information, and the sliding trace information is stored.The touch control unit can be touch screen, the touch screen It can be used for perceiving the touch operation of user on it, the touch operation includes sliding trace operation.Sliding trace information and Finger print information can both be acquired by sensing unit, be also possible to sliding trace information by touch control unit and identified acquisition, refer to Line information is captured to obtain by sensing unit.In short, sliding trace information is single by sensing for the terminal with touch screen Member or touch control unit, which capture, to be obtained, and the application range of device is effectively increased.
It then enters step S1302 judgement and detects sliding trace of the user in the fingerprint identification area and default sliding Whether track matches, if then enter step S1303 judge synchronous acquisition finger print information and preset fingerprint information whether Match, if then entering step S1304 completes unlocking screen.If sliding trace and default sliding trace mismatch, or collect Finger print information and preset fingerprint information mismatch, then enter step S1305 unlocking screen failure.
The preset fingerprint information is the finger print information of the prior typing storage of user, for executing unlocking screen behaviour with user Collected finger print information is compared when making.Preset fingerprint information can store the storage unit in device, in mobile phone It deposits, in the hard disk of computer, is stored in the storage unit of server, when needing to obtain preset fingerprint information, only Device and server need to be allowed to establish communication connection, then obtain preset fingerprint information from server again.The communication connection Including wired communication connection or wireless communication connection.
The comparison of finger print information can realize that algorithm for recognizing fingerprint may be implemented to be stored in dress by algorithm for recognizing fingerprint In the storage unit set, after sensing unit collects the finger print information in fingerprint identification area, the processor of device calls storage Both the finger print information of synchronous acquisition is compared algorithm for recognizing fingerprint in unit with preset fingerprint information, and then judge Whether match.Algorithm for recognizing fingerprint include fingerprint image is pre-processed, data characteristics extraction, characteristic matching, fingerprint recognition And etc., it can be realized with many algorithms, these algorithms are all the mature prior arts, have been applied to each encryption solution Close field, it is not reinflated herein to repeat.
In the present embodiment, the method also includes: when determining that sliding trace and default sliding trace mismatch, or When collected finger print information and preset fingerprint information mismatch, prompt information is issued.The prompt information includes auditory tone cues One of information, picture cues information, light cue information, visual prompts information are a variety of.It is with finger print information mismatch Example, " collected finger print information and preset fingerprint information mismatch " generally comprise following two situation: one is fingerprint recognitions Failure, i.e., be stored in advance the finger print information in storage unit, but in the finger print information of synchronous acquisition user, due to user Finger end and screen contact are not very sufficiently, so that finger print information collected is not very entirely, fingerprint recognition to be caused to fail； Another situation is that not being stored with the preset fingerprint information to match with the finger print information in storage unit.
For the first situation, preset fingerprint information that device matches in the unidentified finger print information to synchronous acquisition When, prompt information or picture cues information can be made a sound.The auditory tone cues information includes that prompt user inputs fingerprint again The speech prompt information of (as executed screen sliding operation again), described image prompt information include that prompt user inputs fingerprint again The pop-up prompt information of (as executed screen sliding operation again).When the number for the finger print information that synchronous acquisition to user inputs is more than pre- If number, and the unidentified finger print information to synchronous acquisition match preset fingerprint information when, then assert storage unit In be not stored with the preset fingerprint information that the finger print information matches, i.e., above-mentioned another described situation.
For second situation, i.e., the preset fingerprint information to match with the finger print information is not stored in storage unit When, device can equally issue picture cues information, such as pop-up prompts the non-typing of user's current finger print information；It can also issue Visual prompts information, contain in the visual prompts information how the study course of the new finger print information of typing, user can foundation Visual prompts information completes the typing of new finger print information.Certainly, prompt information can also pass through the modes such as vibration, light sensation prompt To realize.In short, prompt information be intended merely to allow user recognize as early as possible " not with the finger print information phase of this synchronous acquisition The case where matched finger print information ", the selection as prompt information form can carry out accordingly according to the setting of different manufacturers Adjustment.
In certain embodiments, when display unit is LCD liquid crystal display screen or electric ink display screen, the sensing is single The lower section of member is additionally provided with back light unit, and the sensing unit is set between back light unit and LCD liquid crystal display screen or sets It is placed between back light unit and electric ink display screen.Since LCD liquid crystal display screen is not belonging to self-emission device, thus installing When need sensing unit lower section increase back light unit.Back light unit can be LCD backlight mould group, or other have The electronic component of self light emission function.In further embodiments, when the display unit is AMOLED display screen, due to OLED Display screen belongs to self-emission device, thus no setting is required back light unit.By the setting of above two scheme, can effectively meet The production requirement of different manufacturers improves the scope of application of terminal.
In certain embodiments, the fingerprint identification area includes multiple fingerprint recognition subregions, each fingerprint recognition sub-district A sensing unit is correspondingly arranged below domain.Described device further includes sensing unit control circuit, the method also includes: it receives Enabled instruction of the user to fingerprint recognition subregion, sensing unit control circuit open the lower section of the fingerprint recognition subregion Sensing unit, and out code of the user to fingerprint recognition subregion is received, sensing unit control circuit closes the fingerprint Identify the sensing unit of the lower section of subregion.
By taking the quantity of fingerprint identification area is two as an example, two fingerprint recognition subregions can one on the other or a first from left is right It is uniformly distributed in screen, can also be distributed in screen with other arrangement modes.Below to two fingerprint recognition sub-districts The application process of the terminal in domain illustrates: in use, receiving the enabling signal of user's triggering, two fingerprints are known Optical detector part (i.e. sensing unit) below small pin for the case region is arranged to open state.In preferred embodiment, two fingerprints The range that identification subregion is constituted covers entire display screen, can guarantee the light below two fingerprint recognition subregions in this way When detecting device is arranged to open state, the optical signal into display screen can be by the TFT image sensing array film of lower section (i.e. sensing unit) is absorbed, to capture the finger print information of user.
In other embodiments, the range that two fingerprint recognition subregions are constituted can also account for the 2/ of entire display area 3,3/4 etc..Certainly, user can also like according to itself, and the optical detector part below some fingerprint recognition subregion is arranged It opens, the optical detector part below another fingerprint recognition subregion is closed.It, can be with when not needing to operate terminal Optical detector part below two fingerprint recognition subregions is disposed as closed state.In short, each fingerprint recognition sub-district In opening or closing below optical detector part below domain, it can be liked according to user itself and be configured.
As shown in Figure 1, touch display screen includes cover-plate glass, touch screen, self-luminous diode display pixels from top to bottom Combination can be placed in light detecting array film (i.e. sensing unit) in the lower section of touch display screen, to realize the life to user Reason feature (such as finger print information) carries out detecting identification.By taking fingerprint recognition as an example, structure shown in FIG. 1 is realizing finger print information acquisition When at least there is following problems: (1) be located at finger immediately below display pixel be irradiated to finger after, in the upper table of cover-plate glass The different optical phenomenas such as light penetrates, light reflects and light scatters can occur for face, whether the burr or dimpled grain of fingerprint, real energy Form that bright, dark effective reflected light signal is very faint, and burr or the dimpled grain that distinguish fingerprint are even more extremely difficult；(2) It is limited to the isostructural material of cover-plate glass, touch screen, display screen and relevant thickness, even if reflected light signal is enough strong, works as process Cover-plate glass, touch screen, display screen, after reaching light detecting array film, luminous intensity intensity, which seriously weakens, (is usually cut down 95% or more), while reflected light signal is in the TFT opening by display screen that optical distortion phenomenon can also occur, and affects finger The acquisition of line information；(3) its collimation that shines of each display pixel of self-luminous diode (OLED) display screen is low, i.e., light emitting angle is very Extensively, these wide-angles, which shine, is easy to interfere with adjacent or interval the pixel light source fingerprint to be irradiated, and causes to collect Finger print information inaccuracy.
In order to solve above-mentioned smooth detecting structure when detecting physiological characteristic information, due to entering the anti-of light detecting array film It is serious to penetrate light signal strength reduction, causing the physiological characteristic information lines captured to be distinguished, unobvious, information collection is inaccurate asks Topic, the present invention provides a kind of screen unlocking device of synchronous verifying finger print information, described device can be applied to detecting, identification Physiological characteristic information, such as fingerprint, palmmprint.
As shown in fig. 7, described device includes cover-plate glass, touch screen, self-luminous diode (OLED) display screen 2, light from top to bottom It learns glue 4, optical device 5, light and detects array film 3；The touch screen fits in the lower surface of cover-plate glass, the optical cement 4 Fit in the lower surface of self-luminous diode (OLED) display screen 2；The refractive index of the optical cement 4 is less than the refractive index of cover-plate glass, institute Stating self-luminous diode (OLED) display screen includes multiple display pixels.For ease of description, all attached drawings of the invention are by cover-plate glass It is integrated with touch screen simplification, cover-plate glass/touch screen 1 is denoted as, when describing optical path change, by optical path in cover-plate glass/touching It touches the variation that 1 surface of screen occurs and is reduced to the variation that optical path is occurred in cover-plate glass surface.
When the lower section by light detecting array film configuration in display screen structure, by single display pixel or display pixel Array (can be a row or column display pixel, be also possible to multiple display pictures of cyclically-varying or aperiodic variation arrangement Element) be irradiated to the fingerprint above cover-plate glass as light source after, light will reflect.Due to being irradiated to the light of fingerprint ridge It is most of to be absorbed by burr skin, and the air gap between dimpled grain and cover-plate glass can allow the light portion for being irradiated to dimpled grain Reflection, therefore the light sensitive pixels of light detecting array film can receive bright, the dark feature of difference of fingerprint concave, convex line, light detecting The bright dark feature reconstruction that array film can be shown according to reflected light signal goes out the burr and dimpled grain image of fingerprint.
Referring to Fig. 2, it is as its name suggests by self-luminous two that display screen of the invention, which is self-luminous diode (OLED) display screen, Display screen composed by pole pipe pixel array, such as Organic Light Emitting Diode (OLED) display screen, micro- light emitting diode (micro- LED) display screen etc..The display screen includes MxN display pixel, for the ease of issuing the light of optical signal to each display pixel Road variation is described in detail, and the display pixel of Nth row m column on display screen is denoted as Pmn by the present invention, other display pixels Optical path change can similarly obtain.In order to better describe the optical path change of display pixel, spontaneous optical diode of the present invention is aobvious The thickness of display screen is less than the 1/10 of cover-plate glass thickness, and the refractive index of display screen and cover-plate glass is closer to, thus is counting When calculating optical path change, reflected light signal can be ignored for the variation that display screen surface occurs is compared to cover-plate glass, To simplify explanation.
Referring to Fig. 3, the optical path change signal for the single display pixel light emission reflection being related to for one embodiment of the invention Figure.Top circle indicates that single display pixel Pmn issues the radius of cross section less than R in Fig. 3CLight beam top view, radius For RCLight correspond to cover-plate glass upper surface incidence angle be θ c, such as the corresponding position of dotted line in Fig. 3.
Since cover-plate glass refractive index n2 is about 1.5, air refraction n1 is about 1.0, therefore when (m, n) is a aobvious When showing that the light source of pixel is irradiated upwards with wide-angle, cover-plate glass surface incident angle θ is irradiated to greater than θ c (θ c=sin-1 (n1/n2)) light can be totally reflected.Assuming that the projected length that θ c corresponds to circle coordinates r axis is Rc, with described the (m, N) a light emitting display pixels position Pmn is origin, using Rc as the light outside the circle of dotted line of radius, for can on cover-plate glass table The light ray that face is totally reflected.When the optical radiation for being greater than θ c in cover-plate glass upper surface incident angle is being contacted with cover board When the burr of the fingerprint of glass top surface, since the refractive index of burr skin has destroyed the condition of original total reflection, cause The reflection signal of opposite burr position can not be totally reflected in cover-plate glass, so that part reflected light signal passes through cover board glass Glass lower surface enters light detecting array film and forms bright rays.Relatively, due to there is sky between the dimpled grain of fingerprint and cover-plate glass Gas gap, therefore can maintain to be totally reflected for the reflected light signal of dimpled grain position, and light detecting array film can not be arrived at and shape At dark line.
In short, the incident angle of the i.e. upper surface of cover-plate glass is greater than compared to the light ray within Fig. 3 circle of dotted line The light ray of θ c can more have the fingerprint dimpled grain region of the air gap as detecting.Therefore under an effective optical profile type display screen Fingerprint identification technology needs to be gone to irradiate with the combination of effective irradiation or be scanned on cover-plate glass using Rc as characteristic size Finger position can just obtain the sensitive echo area of height for fingermark image.Assuming that touch cover-plate glass with a thickness of h, then Rc= h·tan-1(θc)。
When the light beam that the light source of (m, n) a display pixel on display screen issues is irradiated upwards with wide-angle, although The incident angle θ for being irradiated to the upper surface of cover-plate glass is greater than the ray (θ c=sin-1 (n1/n2)) of θ c, across air between pair The fingerprint dimpled grain in gap, which has, to be more accurately totally reflected, however is irradiated to the excessive incident angle of cover-plate glass surface, is all-trans The light transmission path for being emitted back towards light detecting array film is also increasingly longer, this will lead to useful optical image information and also decays more Add it is serious, when this part of reflected light signal reaches light detecting array film, it has also become without can refer to making an uproar for value Acoustic jamming.When therefore being also required to define (m, n) a display pixel as fingerprint of the light source irradiation above cover-plate glass, The light reconnaissance range of maximum available information.
Fig. 4 and Fig. 5 are please referred to, since the refractive index of the refractive index (n3) of optical cement is less than the refractive index of cover-plate glass (n2), therefore the first total reflection (hereinafter referred to as " total reflection 1 ") occurs in the upper surface of cover-plate glass and enters optical cement surface In light ray, on optical cement surface the second total reflection (hereinafter referred to as " total reflection can occur for ray of the incident angle φ greater than φ c 2 "), φ c=sin-1 (n3/n2).Assuming that the projected length that φ c corresponds to circle coordinates r axis is Rc '=htan-1 (φ c), In Light outside using (m, n) a display pixel position Pmn as origin, the circle of dotted line that 2Rc ' is radius, as can be in light Learn the light ray that total reflection 2 occurs for glue surface.And for that the light ray of total reflection 2 can occur on optical cement surface, compared to For taking 2Rc ' as the light ray within the circle of dotted line of radius, since reflected light signal path is too long, without having The light ray of high-precision finger print information, therefore the optical cement for being refracted rate n3 < n2 is filtered out in a manner of being totally reflected 2.
Complex chart 4 and Fig. 5 it is found that for single display pixel, can occur in the light beam that goes out total reflection 1 with it is complete The light beam of reflection 2, is to have the corresponding optical signal of degree of precision finger print information.On this basis, it can define and realize screen When lower fingerprint identification technology, after irradiating fingerprint using (m, n) a display pixel of self-luminous diode (OLED) display screen as light source, light Detecting array film can collect relative sensitive and effective finger-print region, be with a display pixel position (m, n) Pmn is origin, Rc to the dashed concentric annular shape band beam area that 2Rc ' range is radius, if projecting to the direction circle coordinates r, It is Rc < r < 2Rc ' regional scope, as light detecting array film can be from the single display picture of self-luminous diode (OLED) display screen The most suitable fingerprint optical information obtained in the light source that element issues, it is specific as shown in Figure 6.
For being greater than the light ray other than the region 2Rc ', as previously mentioned, can be carried out using the optical cement of respective indices of refraction Filtering, i.e., so that the light ray being greater than other than the region 2Rc ' is totally reflected on optical cement surface, without entering light detecting In array film, and then influence the acquisition of finger print information image.And the light ray for being less than the region Rc, the present invention is to pass through The mode that optical device is arranged above light detecting array film is filtered.In the present embodiment, the optical device 4 wraps Include light shading type optical device and phase change formula optical device, the light shading type optical device include periodical pinhole array or It is aperiodicity pinhole array, the phase change formula optical device includes refractive index in periodically variable photon crystal structure Or microlens array structure or refractive index are in the diffusing scattering structure of aperiodicity change.
Preferably, the shape of the pin hole can be circular hole or square hole, and optical device can pass through code aperture (coded Aperture compression sampling method) obtains, and by taking fingerprint recognition as an example, finger print information identification only needs answering for bright, dark two grayscale With requiring, (in the present embodiment, specifically needs to filter display pixel and be irradiated to cover board by designing spatial frequency filtering Glass surface θ<the light ray of θ c and θ>φ c), the code aperture of optical device is designed as the device with light-guiding function, It may be implemented Rc < r < 2Rc ' high-resolution region is bright, half-light signal acquisition, and make the reflected light by optical device Signal detects array film with vertical direction as far as possible (incident angle is less than predetermined angle) incident light.Code aperture (coded Aperture the bibliography of compression sampling method) is as follows: " Coded written by Stephen R.Gottesman Apertures:past, present, and future application and design, " (Proceeding of SPIE, Vol.6714,2007), this article illustrates that code aperture can be widely used in simple one-dimensional model and needs high score The design method of resolution, wide viewing angle, thin optical device.In short, passing through the pressure of code aperture (coded aperture) Contracting sampling method (can require the light by filtering out r < Rc regional scope after optical device according to scheduled parameter request Ray) corresponding optical device is designed, the specific steps are the prior arts, and details are not described herein again.
In further embodiments, optical device can also design to obtain using digital holography, pass through digital holography (or calculator generation holography) (can be required by filtering out r < Rc after optical device according to scheduled parameter request The light ray of regional scope) corresponding optical device is designed, specific steps can refer to following document: M.A.Seldowitz, J.P.Allebach,and D.W.Sweeney,“Synthesis ofdigital holograms by direct binary search,"Appl.Opt.26,2788–2798(1987).This document proposition can be used calculator and be designed with special algorithm Corresponding digital holography optical device out, and then realize that there is high-resolution image output.
In the present embodiment, described device includes that cover-plate glass, touch screen, spontaneous optical diode are shown from top to bottom Screen, optical cement, optical device, light detect array film；The touch screen fits in the lower surface of cover-plate glass, the optical cement Fit in the lower surface of self-luminous diode (OLED) display screen；The refractive index of the optical cement is less than the refractive index of cover-plate glass, described Self-luminous diode (OLED) display screen includes multiple display pixels；Described device further includes processor；It the described method comprises the following steps:
Step S801 processor is initially entered when touch screen detects the touching signals of user's finger, sends display driving Signal is to self-luminous diode (OLED) display screen.By taking finger print information identifies as an example, when touch screen detects that user's finger is placed in cover board glass When the upper surface of glass, then the touching signals are triggered.
S802 display pixel is then entered step when receiving processor display drive signals, issues optical signal, it is described Optical signal is reflected in the upper surface of cover-plate glass, forms reflected light signal.Since display screen and cover-plate glass have centainly Light transmittance, thus display pixel issue optical signal can not only be reflected in the upper surface of cover-plate glass, can also occur It penetrates, that is, the upper surface for being directed through cover-plate glass enters in air, and only reflected in the upper surface of cover-plate glass When optical signal can just enter eventually into light detecting array film, and then corresponding video signal is formed, thus the present invention be directed to Reflected light signal carries out further Screening Treatment.
The optical path that 803 optical cements change reflected light signal is then entered step, is entered in reflected light signal in optical cement The reflected light signal that firing angle is greater than first critical angle is filtered, and obtains the first reflected light signal, and the first reflected light is believed Number enter optical device.The first critical angle is that reflected light signal can be in the critical angle that optical cement surface is totally reflected. In short, being exactly the optical cement for being less than cover-plate glass by refractive index, the too long optical signal of filtering opticpath, the i.e. area r > 2Rc ' The light ray in domain.
Then enter step S804 optical device change the first reflected light signal optical path, in the first reflected light signal The first reflected light signal that the incidence angle of surface optical device is less than first critical angle is filtered, and obtains the second reflected light letter Number, and the second heliogram is made to enter sensing unit (i.e. light detecting array film) with the incidence angle for being less than predetermined angle.Institute Stating second critical angle is that reflected light signal can be in the critical angle that cover-plate glass upper surface is totally reflected.In short, being exactly logical The light ray in the optical device filtering region r < Rc is crossed, and (light is corresponding in reference axis for the light for making by optical device Radius r meets Rc < r < 2Rc ') vertically incident light detects array film as far as possible, luminous flux is improved so as to fingerprint feature information Preferably captured.
It then enters step S805 processor and the received second reflected light signal generation fingerprint of array film is detected according to light Information simultaneously exports.The light beam issued for each display pixel captures the light met in Rc < r < 2Rc ' regional scope Beam, then the optical signal to each display pixel in this region carries out Signal averaging again, reconstructs complete physiological characteristic Identification image information (such as fingermark image information) simultaneously exports.
In certain embodiments, the display screen includes MxN display pixel, which comprises processor is according to pre- If timing electric signal successively drives single display pixel or display pixel array on display screen to issue optical signal, in cover-plate glass Upper surface form luminous point or luminous point array sweeping fingerprint characteristic position, form reflected light signal.Such as the display on display screen The first behavior of pixel P11, P12…P1N, the second behavior P21, P22…P2N, and so on, Nth row PM1, PM2…PMN.By default Timing electric signal, processor can be line by line, by column drive display screen on display pixel, be also possible to drive cycle change from Display pixel is dissipated (as first driven the first row P11、P13、P15, then drive the second row P21、P23、P25, then drive the third line P31、P33、 P35, and so on), naturally it is also possible to successively drive multiple display pixels of aperiodic variation arrangement.In short, driving display The luminous sequence of each display pixel can be selected according to actual needs on screen.
In certain embodiments, the light detecting array film includes PxQ pixel detection region, each pixel detection region pair One pixel detecting structure should be set, and each pixel detecting structure includes being used for picture for one group composed by more than one thin-film electro crystalline substance pipe Plain thin film circuit and a smooth detecting unit；The smooth detecting unit includes photodiode or the brilliant pipe of photosensitive electricity.For each For a light detecting unit, there are following several implementations:
Embodiment one:
The TFT image sensing array film (i.e. light detecting array film) is that photodiode is formed by array, institute Stating photodiode and being formed by array includes photodiode induction zone.Existing liquid crystal display (LCD) panel or organic hair Optical diode (OLED) display panel is all to scan single pixel with TFT structure driving, to realize the aobvious of pixel array on panel Show function.The primary structure for forming TFT switch function is semiconductcor field effect transistor (FET), wherein well known semiconductor layer material Material mainly has amorphous silicon, polysilicon, indium gallium zinc (IGZO) or the organic compound for being mixed with carbon nanomaterial etc..By Such semiconductor material preparation also can be used in the structure of light sensing diode, and production equipment is also compatible with the life in tft array Equipment is produced, therefore TFT light detecting diode (i.e. photodiode) beginning in recent years is produced with tft array preparation method. The specific structure of existing photodiode can refer to United States Patent (USP) US6943070B2, People's Republic of China's patent To the description of light detecting array film structure in CN204808361U.The production technology and display of TFT image sensing array film Unlike panel TFT structure: originally in the pixel openings region of display panel, photo-sensing area is changed in production technology. Its TFT preparation method can use thin glass for substrate, and it is substrate, such as United States Patent (USP) that high temperature resistant plastic, which also can be used, Described in US6943070B2.
The visible light that existing TFT image sensing array film is issued vulnerable to surrounding environment light or display screen matrix The factors such as reflection, refraction influence, and cause optical interference, seriously affect the TFT image sensing array being embedded in below display panel The signal noise ratio (SNR) of film, in order to improve signal noise ratio, as shown in figure 9, light detecting unit of the invention has been done into one Step is improved, and improved TFT image sensing array film is allowed to detect the infrared letter that identification user body part is reflected back Number.Specific structure is as follows:
The photodiode layer includes p-type semiconductor layer, i-type semiconductor layer, n-type semiconductor layer, p-type semiconductor layer, i Type semiconductor layer, n-type semiconductor layer stack setting from top to bottom, and the i-type semiconductor layer is microcrystal silicon structure or amorphous silicon Change germanium junction structure.The microcrystal silicon structure is the semiconductor layer of silane and hydrogen by chemical vapor deposition film-formation, the knot of microcrystal silicon The crystallinity of structure is greater than 40%, and its forbidden bandwidth is less than 1.7eV.The noncrystalline silication germanium junction structure is silane, hydrogen and germanium Alkane passes through the non-crystalline semiconductor layer of chemical vapor deposition film-formation, and its forbidden bandwidth is less than 1.7eV.
Forbidden bandwidth (Band gap) refers to a band gap width (unit is electron-volt (eV)), the energy of electronics in solid Amount cannot continuous value, but some discontinuous energy bands want conduction that will deposit with the presence of free electron, free electron Energy band be known as conduction band (can conductive), bound electronics will become free electron, must just obtain enough energy from valence band Conduction band is transitted to, the minimum value of this energy is exactly forbidden bandwidth.Forbidden bandwidth is an important feature parameter of semiconductor, Size depends mainly on the band structure of semiconductor, i.e., related with the binding property of crystal structure and atom etc..
(300K) at room temperature, the forbidden bandwidth of germanium are about 0.66ev, contain Germanium in silane, when incorporation Germanium Afterwards, the forbidden bandwidth of i-type semiconductor layer can be made to decline, when meeting less than 1.7eV, illustrate that i-type semiconductor layer can receive Optical signal in visible light to infrared light (or near infrared light) wave-length coverage.By adjusting the GeH4 concentration of chemical meteorology deposition, The operating wavelength range of photodiode containing amorphous or microcrystalline silicified germanium junction structure optical wavelength 600nm can be expanded to arrive The range of 2000nm.
Embodiment two:
On the basis of using embodiment one, in order to improve the quantum efficiency of photoelectric conversion, amorphous silicon photodiodes The above p-type of binode/i type/N-shaped build stack can be used to be formed.Photodiode the first knot layer p-type/i type/n-type material is still For amorphous silicon structures, the above p-type of second junction layer/i type/n-type material can be microstructure, polycrystalline structure or mixed with expansible The compound-material of photoactive wavelength range.In short, can realize composition using multiple groups p-type/i type/N-shaped structure stacked on top Photodiode structure, for each p-type/i type/N-shaped structure, then using photodiode knot described in embodiment one Structure.
Embodiment three:
On the basis of using embodiment one or embodiment two, for each p-type/i type/N-shaped structure, wrapped The p-type semiconductor layer contained can be the multilayered structure greater than two layers.Such as p-type semiconductor layer is three-decker, is wrapped from top to bottom Include the first p-type semiconductor layer (p1 layers), the second p-type semiconductor layer (p2 layers), third p-type semiconductor layer (p3 layers).Wherein, p1 layers Non-crystalline structure and heavy doping boron twice or more of standard technology (boron concentration for) can be used；P2 and p3 uses crystallite knot Structure, and boron (according to standard technology doped in concentrations profiled) normally is adulterated, the p2 layer being thinned by thickness and the p3 layers of suction reduced to light It receives, so that light enters i layers as much as possible and absorbed by i layers, improves photoelectric conversion rate；P2 layers and p3 layers of another aspect are adopted With normal boron doping it is possible to prevente effectively from the heavy doping due to p1 layers causes to deteriorate built in potential.When p-type semiconductor layer includes Similar for the multilayered structure of other numbers of plies, details are not described herein again.
Likewise, n-type semiconductor layer may be the multilayered structure greater than two layers.Such as n-type semiconductor layer is three-layered node Structure includes the first n-type semiconductor layer (n1 layers), the second n-type semiconductor layer (n2 layers), third n-type semiconductor layer (n3 from top to bottom Layer).Wherein, non-crystalline structure and heavy doping phosphorus can be used for n3 layers (phosphorus content is twice of standard technology or more)；N1 and n2 are adopted Phosphorus (according to standard manufacturing process) is adulterated with microstructure, and normally, the n1 layer being thinned by thickness and n2 layers of reduction are to light Absorption improve photoelectric conversion rate so that light enters i layers as much as possible and absorbed by i layers；N1 layers of another aspect and n2 Layer is using normal phosphorus doping it is possible to prevente effectively from the heavy doping due to n3 layers causes to deteriorate built in potential.Work as n-type semiconductor layer Including similar for the multilayered structure of other numbers of plies, details are not described herein again.
Example IV:
TFT image sensing array film (i.e. light detecting array film) is that the brilliant pipe of photosensitive electricity is formed by array, the light It includes the brilliant pipe induction zone of photosensitive electricity that the quick brilliant pipe of electricity, which is formed by array, and the photosensitive brilliant pipe induction zone of electricity is provided with photo-conductive film crystalline substance Body pipe.As shown in Figure 10, the photoconductive film transistor includes grid 101, source electrode 102, drain electrode 103, insulating layer 104, light suction Receive semiconductor layer 105；The photoconductive film transistor is coplanar formula structure of standing upside down, and coplanar formula structure of standing upside down includes: The grid 101, insulating layer 104, source electrode 102 are longitudinal to be arranged from bottom to top, and the drain electrode 103 and the source electrode 102 are laterally total Face setting；Insulating layer 104 wraps up the grid 101, so that between grid 101 and source electrode 102, grid 101 and drain electrode 103 It does not contact；It is logical to form photosensitive leakage currents between source electrode 102 and 103 transverse directions that drain for clearance fit between source electrode 102 and drain electrode 103 Road, the light absorption semiconductor layer 105 are set in photosensitive leakage currents channel.
When generally operating in off position by grid voltage control TFT, source electrode does not have electric current between draining and passes through； However when TFT is irradiated by light source, since the energy of light inspires electron-hole pair in semiconductor, the field-effect of TFT structure is made With electron-hole pair being made to separate, and then TFT is made to generate photosensitive leakage currents.Such photosensitive leakage currents characteristic allows tft array can It applies in the technology of light detecting or light detecting.Compared to the general device for making photoconductive film transistor using TFT leakage current, originally Invention is configured at the top light-absorption layer to stand upside down coplanar type field effect transistor structure for light absorption semiconductor layer, is added significantly to Photoelectronic excitation, improves photoelectric conversion efficiency.
As shown in figure 12, the flow chart of the preparation method for the light detecting unit being related to for an embodiment of the present invention.It is described Method is used to prepare the photoconductive film transistor (i.e. light detecting unit) of embodiment six, specifically includes the following steps:
It initially enters step S1201 and goes out grid by changing magnetron sputtering plating on the substrate of pixel thin film transistor.Picture The substrate of plain thin film transistor (TFT) can use hardboard, can also use flexible material (such as polyimides)；
It is exhausted out by chemical vapor deposition or magnetron sputtering plating in the top of the grid then to enter step S1202 Edge layer；
It then enters step S1203 and source electrode and drain electrode is gone out by chemical vapor deposition plated film in the top of the insulating layer N-type doping semiconductor layer, and go out by magnetron sputtering plating the metal layer of source electrode and drain electrode, it is defined by yellow light etch process The source electrode and drain electrode of preset structure, it is laterally coplanar to obtain source electrode and drain electrode, and clearance fit, and makes source electrode and drain electrode transverse direction Between formed photosensitive leakage currents channel；
It then enters step S1204 chemical gas-phase deposition coating in the photosensitive leakage currents channel and goes out light absorption semiconductor Layer.
Embodiment five:
For well known field effect transistor structure, the TFT as turntable driving and data transfer switch is not required to special needle The structure that photoelectric current is collected between source electrode and drain electrode is designed；However the detecting in photosensitive leakage currents is applied to field-effect transistor On, if after the electron-hole pair excited by light is separated by field effect, by drift (Drift) Path too long of electric field driven, pole It is possible that just make with hole in conjunction with (Recombination) before photoelectron fails smoothly to arrive at electrode, or by Hanging bond (Dangling Bond) defect of light absorption semiconductor layer itself can not be contributed effectively to capture and make light detecting Photoelectric current output.It is influenced to improve photosensitive leakage currents by passage length between source electrode and drain electrode, suction can be increased to reach The purpose that photosemiconductor area is but not deterioration photoelectric conversion efficiency is received, to the source electrode and drain electrode of example IV in the present embodiment A step improvement is carried out, the new structure of a source electrode and drain electrode is proposed.
As shown in figure 11, the quantity of the source electrode and drain electrode is multiple, parallel with one another between source electrode and source electrode, drain electrode and It is parallel with one another between drain electrode；Clearance fit between the source electrode and drain electrode forms photosensitive leakage currents between source electrode and drain electrode transverse direction Channel includes: that the first gap is formed between adjacent source electrode, and a drain electrode is placed in first gap, between adjacent drain electrode The second gap is formed, a source electrode is placed in second gap, is staggered between source electrode and drain electrode and clearance fit.It is each The distance between source electrode and adjacent drain electrode are less than electronics drift distance, and the electronics drift distance is under electronics effect effect on the scene The distance that can be survived.In this way, detecting in pixel at each, multiple source electrodes of affiliated same pixel are all parallel with one another, and institute The multiple drain electrodes for belonging to same pixel are also all parallel with one another, and photo-excited electron and hole compound probability again can be effectively reduced, mention High field-effect acts on lower electrode and collects photoelectronic probalility of success, maximumlly improves TFT leakage current photo-conductive film crystal The light sensitivity of pipe.
In the process for the photoconductive film transistor (i.e. light detecting unit) for gradually preparing embodiment five, general steps and system The photoconductive film transistor of standby example IV is similar.Difference is, when preparing source electrode and drain electrode, " passes through Huang in step S1203 Light etching process defines the source electrode and drain electrode of preset structure, and it is laterally coplanar to obtain source electrode and drain electrode, and clearance fit, and makes Between source electrode and drain electrode transverse direction formed photosensitive leakage currents channel " include: by yellow light etch process define source electrode group and Drain electrode group, each source electrode group includes multiple source electrodes, parallel with one another between source electrode and source electrode；Each drain electrode Group includes multiple drain electrodes, parallel with one another between drain electrode and drain electrode；The first gap is formed between adjacent source electrode, a drain electrode is placed in In first gap, the second gap is formed between adjacent drain electrode, a source electrode is placed in second gap, source electrode and leakage It is staggered between pole and clearance fit.
In certain embodiments, the light detecting array film detects state in light for receiving detecting trigger signal, And the optical signal of detecting position (such as fingerprint, eyeball, iris) reflection is received to capture the detecting location information of user；And it uses In receiving light source trigger signal, in light source (such as infrared light supply) state of sending.Preferably, light source trigger signal and detecting trigger Signal alternately switches, and meets a predeterminated frequency.By taking light detecting array film is formed by array for photodiode as an example, In In actual application, the additional bias of turntable driving (including forward bias or zero-bias or back bias voltage) In can be made by TFT Between p-type/i type/N-shaped photodiode, realize that TFT image sensing array film issues infrared light function.
Specifically, it can replace and apply forward bias or zero-bias or negative between p-type/i type/infrared photodiode of N-shaped Bias, to trigger first trigger signal or the second trigger signal.Being formed by array with infrared photodiode has 10 column For pixel-matrix, forward bias is applied to the infrared photodiode of p-type/i type/N-shaped within the period 1, so that 10 column pixels Dot matrix, which is in, issues infrared light state；Within second round to the infrared photodiode of p-type/i type/N-shaped apply zero-bias or Back bias voltage, so that 10 column pixel-matrixs are in infrared light detecting state, the infrared light letter being reflected back for capturing user eyeball Breath, and generate corresponding infrared image output；The infrared photodiode of p-type/i type/N-shaped is applied again within the period 3 positive Bias, so that 10 column pixel-matrixs, which are in, issues infrared light state, alternately and repeatedly, and so on.Further, light source triggers Signal (i.e. the first trigger signal) replaces switching with detecting trigger signal (i.e. the second trigger signal), and it is pre- that the frequency of switching meets one If frequency.Time interval between the adjacent period can be arranged according to actual needs, and preferably time interval can be set to The tft array driving scanning infrared photodiode arrangement of each frame (Frame) can at least receive the complete video signal of a frame Required time, i.e. predeterminated frequency are once switched to be every by above-mentioned time interval.
The unlocking screen method and apparatus of synchronous verifying finger print information, the method described in above-mentioned technical proposal are applied to The device of the unlocking screen of synchronous verifying finger print information, described device includes display unit and sensing unit, the display unit On be provided with fingerprint identification area, the sensing unit is located at the lower section of the fingerprint identification area, for obtaining fingerprint identification area Finger print information；It the described method comprises the following steps: receiving sliding trace of the user in the fingerprint identification area, synchronous acquisition The corresponding finger print information of user's finger；When detecting sliding trace of the user in the fingerprint identification area and default sliding trace When matching, judge whether the finger print information of synchronous acquisition matches with preset fingerprint information, if then completing unlocking screen, otherwise Unlocking screen failure.In this way, when user carries out screen sliding unlock operation, the synchronous acquisition and certification for carrying out user fingerprints information, On the one hand the safety of unlocking screen is effectively improved by the way of double authentication, another aspect user is not necessarily in specific keys On carry out operation the acquisition of finger print information can be realized, effectively improve user experience.
It should be noted that being not intended to limit although the various embodiments described above have been described herein Scope of patent protection of the invention.Therefore, it based on innovative idea of the invention, change that embodiment described herein is carried out and is repaired Change, or using equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it directly or indirectly will be with Upper technical solution is used in other related technical areas, is included within scope of patent protection of the invention.

Claims (10)

1. a kind of unlocking screen method of synchronous verifying finger print information, which is characterized in that the method is applied to synchronous verifying and refers to The device of the unlocking screen of line information, described device include display unit and sensing unit, and finger is provided on the display unit Line cog region, the sensing unit is located at the lower section of the fingerprint identification area, for obtaining the finger print information in fingerprint identification area； It the described method comprises the following steps:
Receive sliding trace of the user in the fingerprint identification area, the corresponding finger print information of synchronous acquisition user's finger；
When detecting that sliding trace of the user in the fingerprint identification area and default sliding trace match, judgement, which synchronizes, is adopted Whether the finger print information of collection matches with preset fingerprint information, if then completing unlocking screen, otherwise unlocking screen fails.
2. the unlocking screen method of synchronous verifying finger print information as described in claim 1, which is characterized in that the sensing unit Array film is detected for light, the light detecting array film includes PxQ pixel detection region, and each pixel detection region is correspondingly arranged One pixel detecting structure, each pixel detecting structure include being used for pixel thin film for one group composed by more than one thin-film electro crystalline substance pipe Circuit and a smooth detecting unit；The smooth detecting unit includes photodiode or the brilliant pipe of photosensitive electricity.
3. the unlocking screen method of synchronous verifying finger print information as claimed in claim 2, which is characterized in that the light detecting is thin Film is that photodiode is formed by array, and the photodiode includes photodiode induction zone, the photodiode Photodiode layer is provided in induction zone, the photodiode layer includes p-type semiconductor layer, i-type semiconductor layer, N-shaped half Conductor layer, p-type semiconductor layer, i-type semiconductor layer, n-type semiconductor layer stack setting from top to bottom, and the i-type semiconductor layer is Microcrystal silicon structure or noncrystalline silication germanium junction structure.
4. the unlocking screen method of synchronous verifying finger print information as claimed in claim 2, which is characterized in that the light detecting is thin Film is that the brilliant pipe of photosensitive electricity is formed by array, and the photosensitive brilliant pipe of electricity includes the brilliant pipe induction zone of photosensitive electricity, the photosensitive brilliant pipe of electricity Induction zone is provided with photoconductive film transistor, and the photoconductive film transistor includes grid, source electrode, drain electrode, insulating layer, light absorption Semiconductor layer；The photoconductive film transistor is coplanar formula structure of standing upside down, and coplanar formula structure of standing upside down includes: the grid Pole, insulating layer, source electrode are longitudinally arranged from bottom to top, and the drain electrode is laterally coplanar with the source electrode；Described in insulating layer package Grid, so that not contacted between grid and source electrode, grid and drain electrode；Clearance fit between source electrode and drain electrode, source electrode and leakage Photosensitive leakage currents channel is formed extremely between transverse direction, the light absorption semiconductor layer is set in photosensitive leakage currents channel.
5. the unlocking screen method of synchronous verifying finger print information as described in claim 1, which is characterized in that the fingerprint recognition Area includes multiple fingerprint recognition subregions, is correspondingly arranged a sensing unit below each fingerprint recognition subregion；The method Include:
Enabled instruction of the user to fingerprint recognition subregion is received, the sensing list of the lower section of the fingerprint recognition subregion is opened Member；
Alternatively, receiving out code of the user to fingerprint recognition subregion, the biography of the lower section of the fingerprint recognition subregion is closed Feel unit.
6. the unlocking screen method of synchronous verifying finger print information as claimed in claim 1 or 2, which is characterized in that the display Unit is self-luminous diode (OLED) display screen, and described device further includes cover-plate glass, touch screen, optical cement, optical device；
The cover-plate glass, touch screen, self-luminous diode (OLED) display screen, optical cement, optical device, sensing unit are set from top to bottom It sets；The touch screen fits in the lower surface of cover-plate glass, and the optical cement fits in the following table of self-luminous diode (OLED) display screen Face；The refractive index of the optical cement is less than the refractive index of cover-plate glass, and the self-luminous diode (OLED) display screen includes multiple displays Pixel；Described device further includes processor；
The sliding trace that user is received in the fingerprint identification area, the corresponding finger print information packet of synchronous acquisition user's finger It includes:
It is aobvious to spontaneous optical diode to send display drive signals when touch screen detects the touching signals of user's finger for processor Display screen；
Display pixel issues optical signal, the optical signal is in the upper of cover-plate glass when receiving processor display drive signals Surface is reflected, and reflected light signal is formed；
Optical cement changes the optical path of reflected light signal, is greater than first critical angle in the incidence angle of optical cement in reflected light signal Reflected light signal is filtered, and obtains the first reflected light signal, and the first reflected light signal is made to enter optical device；Described One critical angle is that reflected light signal can be in the critical angle that optical cement surface is totally reflected；
Optical device changes the optical path of the first reflected light signal, to the incidence angle in the first reflected light signal in surface optical device The first reflected light signal less than first critical angle is filtered, and obtains the second reflected light signal, and makes the second heliogram Enter sensing unit to be less than the incidence angle of predetermined angle；The second critical angle is that reflected light signal can be on cover-plate glass The critical angle that surface is totally reflected；
Processor generates finger print information according to received second reflected light signal of sensing unit and exports.
7. the unlocking screen method of synchronous verifying finger print information as claimed in claim 6, which is characterized in that the self-luminous two Pole pipe display screen includes MxN display pixel；The described method includes:
Processor successively drives single display pixel or display pixel array on display screen to issue light according to default timing electric signal Signal forms reflected light signal to form luminous point or luminous point array sweeping user's finger position in the upper surface of cover-plate glass.
8. a kind of screen unlocking device of synchronous verifying finger print information, which is characterized in that described device includes display unit, sensing Unit, processor and computer program are provided with fingerprint identification area on the display unit, and the sensing unit is located at the finger The lower section of line cog region, for obtaining the finger print information in fingerprint identification area；
For the sensing unit for receiving sliding trace of the user in the fingerprint identification area, synchronous acquisition user's finger is corresponding Finger print information；
The computer program performs the steps of when being executed by processor
When detecting that sliding trace of the user in the fingerprint identification area and default sliding trace match, judgement, which synchronizes, is adopted Whether the finger print information of collection matches with preset fingerprint information, if then completing unlocking screen, otherwise unlocking screen fails.
9. the screen unlocking device of synchronous verifying finger print information as claimed in claim 8, which is characterized in that the display unit For self-luminous diode (OLED) display screen, described device further includes cover-plate glass, touch screen, optical cement, optical device；
The cover-plate glass, touch screen, self-luminous diode (OLED) display screen, optical cement, optical device, sensing unit are set from top to bottom It sets；The touch screen fits in the lower surface of cover-plate glass, and the optical cement fits in the following table of self-luminous diode (OLED) display screen Face；The refractive index of the optical cement is less than the refractive index of cover-plate glass, and the self-luminous diode (OLED) display screen includes multiple displays Pixel；
The processor is used for when touch screen detects the touching signals of user's finger, sends display drive signals to self-luminous Diode (OLED) display screen；
The display pixel is used for when receiving processor display drive signals, issues optical signal, the optical signal is in cover board The upper surface of glass is reflected, and reflected light signal is formed；
The optical cement is greater than first in the incidence angle of optical cement in reflected light signal for changing the optical path of reflected light signal The reflected light signal of critical angle is filtered, and obtains the first reflected light signal, so that the first reflected light signal enters optical device； The first critical angle is that reflected light signal can be in the critical angle that optical cement surface is totally reflected；
The optical device for changing the first reflected light signal optical path, in the first reflected light signal in surface optical device Incidence angle be less than first critical angle the first reflected light signal be filtered, obtain the second reflected light signal, and make second Reflected light signal enters sensing unit with the incidence angle for being less than predetermined angle；The second critical angle is that reflected light signal can be The critical angle that cover-plate glass upper surface is totally reflected；
The processor is used to generate finger print information according to received second reflected light signal of sensing unit and export.
10. the screen unlocking device of synchronous verifying finger print information as claimed in claim 9, which is characterized in that the optics device Part includes light shading type optical device and phase change formula optical device, and the light shading type optical device includes periodical pin hole battle array Column or aperiodicity pinhole array, the phase change formula optical device include that refractive index is brilliant in periodically variable photon Body structure or microlens array structure or refractive index are in the diffusing scattering structure of aperiodicity change.
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CN201810475509.XA CN110502177B (en) 2018-05-17 2018-05-17 Screen unlocking method and device for synchronously verifying fingerprint information
PCT/CN2019/087275 WO2019219061A1 (en) 2018-05-17 2019-05-16 Screen unlocking method and device based on synchronous verification of fingerprint information
TW110145946A TWI790848B (en) 2018-05-17 2019-05-17 Method and device for verifying fingerprint information
TW108117060A TWI750473B (en) 2018-05-17 2019-05-17 Screen unlocking method and device for synchronously verifying fingerprint information
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