WO2018205835A1 - 指纹识别器件及方法、发光装置、光传感器和显示装置 - Google Patents

指纹识别器件及方法、发光装置、光传感器和显示装置 Download PDF

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Publication number
WO2018205835A1
WO2018205835A1 PCT/CN2018/084460 CN2018084460W WO2018205835A1 WO 2018205835 A1 WO2018205835 A1 WO 2018205835A1 CN 2018084460 W CN2018084460 W CN 2018084460W WO 2018205835 A1 WO2018205835 A1 WO 2018205835A1
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Prior art keywords
unit
light emitting
fingerprint
light
signal
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PCT/CN2018/084460
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English (en)
French (fr)
Inventor
丁小梁
王海生
刘英明
王鹏鹏
刘伟
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京东方科技集团股份有限公司
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Priority to US16/323,972 priority Critical patent/US10872223B2/en
Publication of WO2018205835A1 publication Critical patent/WO2018205835A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
    • G01L1/2293—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges of the semi-conductor type
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
    • 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
    • H01L31/10—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors characterised by potential barriers, e.g. phototransistors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00

Definitions

  • Embodiments of the present disclosure relate to a fingerprint recognition device, a fingerprint recognition method, a light emitting device, a light sensor, and a display device.
  • Fingerprint recognition technology can be realized by a variety of sensors, which are common sensors in fingerprint recognition technology.
  • Embodiments of the present disclosure provide a fingerprint recognition device, a fingerprint recognition method, a light emitting device, and a light sensor and a display device.
  • At least one embodiment of the present disclosure provides a fingerprint recognition device including a pressure detecting unit, a light emitting unit, a photosensitive unit, and a fingerprint analyzing unit; the pressure detecting unit configured to detect a force of a finger pressing the display screen and according to the strength Transmitting a signal to the lighting unit; the lighting unit is configured to emit an optical signal under control of the signal; the photosensitive unit is configured to receive a light reflecting signal formed by the optical signal being reflected by the finger, and The light reflection signal is converted into an electrical signal output to a fingerprint resolution module; the fingerprint analysis unit is configured to determine fingerprint information according to the received electrical signal.
  • At least one embodiment of the present disclosure also provides a fingerprint identification method, including: a pressure detecting unit detects a strength at which a finger presses a display screen, and transmits a signal to the light emitting unit according to the velocity; control of the light emitting unit at the signal Deriving an optical signal; receiving, by the photosensitive unit, a light reflection signal formed by the optical signal being reflected by the finger, and converting the light reflection signal into an electrical signal output to a fingerprint analysis unit; the fingerprint analysis unit according to the received The electrical signal determines the fingerprint information.
  • a pressure detecting unit detects a strength at which a finger presses a display screen, and transmits a signal to the light emitting unit according to the velocity; control of the light emitting unit at the signal Deriving an optical signal; receiving, by the photosensitive unit, a light reflection signal formed by the optical signal being reflected by the finger, and converting the light reflection signal into an electrical signal output to a fingerprint analysis unit; the fingerprint analysis unit according to the received The electrical signal determines the fingerprint
  • At least one embodiment of the present disclosure also provides a light emitting device including a light emitting unit and a varistor.
  • the light emitting unit includes an anode, a cathode, and a light emitting layer between the anode and the cathode.
  • the varistor includes a first electrode, a second electrode, and a pressure sensitive material between the first electrode and the second electrode, and a second electrode of the varistor is electrically connected to an anode of the light emitting unit, The current passing through the light emitting unit is controlled by the current passing through the varistor.
  • At least one embodiment of the present disclosure also provides a light sensor including the above-described light emitting device and further comprising a photosensitive unit configured to emit an optical signal, the photosensitive unit configured to detect the light emitting device A light reflection signal formed by the emitted optical signal being reflected.
  • At least one embodiment of the present disclosure also provides a display device including the above-described fingerprint recognition device or light emitting device or light sensor.
  • FIG. 1 is a schematic diagram of a fingerprint identification device in at least one embodiment of the present disclosure
  • FIG. 2 is a schematic structural view of a film layer of an organic electroluminescent diode device according to at least one embodiment of the present disclosure
  • FIG. 3 is a schematic view of a photosensitive unit in at least one embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of respective film layer structures of a fingerprint identification device in at least one embodiment of the present disclosure
  • FIG. 5 is a schematic diagram showing electrical connections of a pressure detecting unit and a light emitting unit in a fingerprint recognition device according to at least one embodiment of the present disclosure
  • FIG. 6 is an equivalent circuit diagram of the circuit shown in FIG. 5 in a fingerprint identification process
  • FIG. 7 is a schematic diagram of electrical connections of a pressure detecting unit, a light emitting unit, a pixel unit driving circuit, and a control unit in a fingerprint recognition device according to at least one embodiment of the present disclosure
  • FIG. 8 is a schematic diagram of a light emitting device according to at least one embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a light sensor provided by at least one embodiment of the present disclosure.
  • FIG. 10 is a flow chart of a fingerprint identification method in at least one embodiment of the present disclosure.
  • the inventor of the present application noticed that the optical fingerprint recognition of the current display terminal is mostly integrated on the touch panel of the non-display area of the display terminal (for example, on the home button), however, the touch panel of the non-display area The area is limited, and the presence of mechanical buttons reduces the screen ratio and increases production costs.
  • a fingerprint recognition device including a pressure detecting unit, a light emitting unit, a photosensitive unit, and a fingerprint analyzing unit;
  • the pressure detecting unit is configured to detect a force at which the finger presses the display screen and transmit a signal to the light emitting unit according to the velocity
  • the light emitting unit is configured to emit an optical signal under the control of the signal;
  • the photosensitive unit is configured to receive the light reflected signal formed by the light signal reflected by the finger, and convert the light reflected signal into an electrical signal output to the fingerprint analysis module; fingerprint analysis
  • fingerprint analysis The unit is configured to determine fingerprint information based on the received electrical signal.
  • the fingerprint recognition device is capable of implementing a fingerprint recognition function in a display area of a display screen.
  • a plurality of fingerprints can be obtained by changing the pressing force of the finger, and the user's pressing behavior habit data can be obtained according to the fingerprints to improve the reliability of the fingerprint recognition.
  • the display screen of the fingerprint recognition device includes a display area and a peripheral area outside the display area, the display area includes a plurality of open areas and a non-open area surrounding the plurality of open areas, the pressure detecting unit, the light emitting unit and the photosensitive unit Located in the display area.
  • At least one embodiment of the present disclosure provides a fingerprint recognition device including a pressure detecting unit 01, a light emitting unit 02, a photosensitive unit 03, and a fingerprint analyzing unit 04.
  • the pressure detecting unit 01 is configured to detect the strength at which the finger presses the display screen of the fingerprint recognition device, and transmits different signals respectively related to different velocities to the light emitting unit 02 according to the change in the tempo.
  • the light emitting unit 02 is configured to emit an optical signal whose intensity varies with the different signal under the control of different signals transmitted by the pressure detecting unit 01. For example, the greater the finger pressing force, the greater the intensity of the light signal emitted by the light unit 02.
  • the photosensitive unit 03 is configured to receive different light reflection signals formed by different light signals reflected by the fingers (the stronger the light signal emitted by the light emitting unit 02, the stronger the light reflection signal received by the photosensitive unit 03), and the The different light reflection signals are converted into different electrical signals and output to the fingerprint resolution unit 04.
  • the fingerprint resolution unit 04 is configured to determine fingerprint information based on the received different electrical signals.
  • the fingerprint parsing unit 04 is an integrated circuit (IC) or a similar circuit for processing an electrical signal output from the photosensitive unit 03 to obtain fingerprint information.
  • IC integrated circuit
  • the fingerprint parsing unit obtains a fingerprint according to each electrical signal, and obtains different fingerprints according to different electrical signals.
  • the fingerprint resolution unit may determine the relationship between the fingerprint data and the pressing force and/or the pressing speed according to different fingerprints obtained by different electrical signals, thereby generating fingerprint pressing behavior data of the user.
  • the fingerprint information obtained by the fingerprint parsing unit 04 in the embodiment of the present disclosure may be a fingerprint, or a relationship between the fingerprint data and the pressing force and/or the pressing speed, or the fingerprint pressing behavior data of the user.
  • the light emitting unit 02 includes an Organic Light-Emitting Diode (OLED).
  • OLED Organic Light-Emitting Diode
  • the light emitting unit 02 may also include an inorganic light emitting diode or other type of active light emitting device.
  • OLED display panels made of OLEDs have become a competitive and promising next generation due to their all-solid-state structure, high brightness, full viewing angle, fast response, and flexible display. Display technology.
  • one pixel unit includes three sub-pixel units including, for example, an R (red) sub-pixel unit, a G (green) sub-pixel unit, and a B (blue) sub-pixel unit, and each sub- The pixel units all include an OLED.
  • the light-emitting unit includes, in order from bottom to top, an anode 20, a hole transport layer 30, a light-emitting layer 40 (e.g., an organic light-emitting layer), an electron transport layer 50, and a cathode 60 on the substrate 10.
  • the light emitting unit may also include an anode 20, a light emitting layer 40, and a cathode 60 on the substrate 10 in sequence.
  • the substrate 10 is a glass substrate, a quartz substrate, a plastic substrate, or other type of transparent substrate.
  • the material of the anode 20 is indium tin oxide (ITO) or other transparent conductive material.
  • ITO indium tin oxide
  • a Hole Transport Layer (HTL) 30, an Emitting Material Layer (EML) 40, and an Electro Transport Layer (ETL) 50 are located between the anode 20 and the cathode 60 through the anode.
  • a certain voltage difference is generated between the cathode 20 and the cathode 60 to form a current between the anode 20 and the cathode 60 to effect light emission of the light-emitting layer 40.
  • the signal transmitted from the pressure detecting unit 01 to the light emitting unit 02 is a current signal.
  • the use of a current signal to control the illuminating intensity of the OLED is advantageous for achieving precise control of the illuminating intensity of the OLED.
  • the light emitting unit 02 may include one sub-light emitting unit or a plurality of sub-light emitting units, each of the sub-light emitting units including an anode, a cathode, and a sub-light emitting layer therebetween.
  • each sub-lighting unit includes an OLED.
  • each sub-pixel unit includes one sub-light emitting unit.
  • the light emitting layer 40 includes a plurality of sub-light emitting layers, and may include, for example, three sub-light emitting layers of R (red), G (green), and B (blue).
  • the photosensitive unit 03 is a photosensor.
  • the photosensitive unit 03 includes a photodiode such as a PIN diode; or, the photosensitive unit 03 includes a phototransistor or other type of photosensor.
  • each of the photosensors 301 can be controlled to open and close by a switching device 302.
  • photosensor 301 can be a photodiode, such as a PIN diode.
  • the switching device 302 can be a Thin Film Transistor (TFT).
  • the principle of fingerprint recognition is that, due to the difference between the valleys of the fingerprints of the finger, the light signal emitted by the light-emitting unit 02 is irradiated onto the finger, and different reflected light is generated at different positions of the finger.
  • a change in light intensity at a plurality of photosensors eg, a plurality of photodiodes
  • the photosensitive element 03 includes a plurality of photosensors arranged in an array having a plurality of rows and a plurality of columns.
  • the detection of the fingerprint valley can be realized by controlling the switching devices (for example, TFTs) of the respective photosensors and sequentially reading out the current difference of each photosensor (for example, a photodiode). .
  • the photosensitive unit 03 is disposed above the light emitting unit (eg, OLED) 02 (ie, the light exiting side of the light emitting unit 02).
  • the photosensitive unit 03 and the light emitting unit 02 are both located on the same substrate (see the substrate 10 in FIG. 4), the light emitting unit 02 is located between the photosensitive unit 03 and the substrate 10; when the finger is pressed, the photosensitive unit 03 is located in the light emitting unit 02. The side facing the finger.
  • the pressure sensing unit 01 includes a varistor and an operational amplifier.
  • the varistor includes a first electrode, a pressure sensitive material and a second electrode, the second electrode of the varistor is electrically connected to the anode of the light emitting unit, the first electrode of the varistor is applied with a first voltage; and the inverting input of the operational amplifier The end is connected to the anode of the light emitting unit, the non-inverting input of the operational amplifier is applied with a second voltage, and the output of the operational amplifier is connected to the cathode of the light emitting unit; the first voltage is greater than the second voltage.
  • the varistor further includes an insulating layer, the insulating layer, the first electrode, the pressure sensitive material, and the insulating layer of the second electrode are sequentially arranged in a direction from the photosensitive unit to the light emitting unit (ie, arranged in order from top to bottom).
  • the pressure sensitive material of the varistor is disposed in the light emitting layer of the light emitting unit.
  • the light emitting unit includes a plurality of sub-light emitting units arranged side by side such that the light emitting layer includes a plurality of sub-light emitting layer patterns respectively corresponding to the plurality of sub-light emitting units, in which case the pressure sensitive material is, for example, located in an adjacent sub-light emitting layer pattern. between.
  • the fingerprint identification device provided by at least one embodiment of the present disclosure includes, in order from bottom to top, a substrate (for example, an array substrate formed with a plurality of switching elements arranged in an array) 10, a pixel unit
  • the light emitting unit 02 includes a plurality of sub-light emitting units (for example, three sub-light emitting units), the anodes 20 of the plurality of sub-light emitting units are spaced apart from each other, and the light emitting layer 40 includes a plurality of anodes 20 respectively.
  • a plurality of sub-light-emitting layers (see the sub-light-emitting layers 401, 402, 403), the cathodes of the plurality of sub-light-emitting units are continuously formed to obtain a cathode 60.
  • the plurality of sub-light-emitting layers included in the light-emitting layer 40 include a first sub-light-emitting layer 401, a second sub-light-emitting layer 402, and a third sub-light-emitting layer 403.
  • the first sub-light emitting layer 401, the second sub-light emitting layer 402, and the third sub-light emitting layer 403 are a blue light emitting layer, a red light emitting layer, and a green light emitting layer, respectively.
  • the photosensitive unit 03 is located on the upper side of the encapsulation layer 70; in other embodiments, the photosensitive unit 03 may also be located on the lower side of the encapsulation layer 70.
  • the anode 20 of the sub-lighting unit When the output signal of the pixel unit driving circuit 90 is turned on, the anode 20 of the sub-lighting unit receives the driving signal to drive the sub-lighting unit to emit light; when the output signal of the pixel unit driving circuit 90 is turned off, the anode 20 of the sub-lighting unit does not receive the driving. Signal, the sub-lighting unit does not emit light.
  • the cathodes 60 of each sub-lighting unit are in communication (e.g., direct electrical connection).
  • a varistor 404 is further disposed in the luminescent layer 40.
  • the varistor 404 is located in an opening around the sub-luminescent layer (see the sub-luminescent layer 403) of the luminescent layer 40.
  • the structure of the varistor 404 includes, in order from top to bottom, an insulating layer 4041, a first electrode 4042, a pressure sensitive material 4043, and a second electrode 4044.
  • the varistor 404 includes an insulating layer 4041, a first electrode 4042, a pressure sensitive material 4043, and a second electrode 4044, both located between the layer of the anode 20 of the light emitting unit 02 and the cathode 60.
  • the insulating layer 4041 forms a recessed space, the opening of the recessed space faces the substrate 10, and the first electrode 4042 of the varistor 404 and the pressure sensitive material 4043 are located in the recessed space.
  • the insulating layer 4041 of the varistor 404 is located between the cathode 60 of the light emitting unit 02 and the first electrode 4042 of the varistor 404.
  • the second electrode 4044 of the varistor 404 and the anode 20 electrically connected thereto can be formed by the same film layer (ie, the same layer is provided in the same material).
  • the second electrode 4044 of the varistor 404 is in communication (eg, directly electrically connected) with the anode 20 of the at least one sub-light emitting unit, and the pressure sensitive material 4043 of the varistor 404 is disposed in the light emitting layer 40, and the sub-light emitting unit
  • the sub-luminescent layer (see 403 in FIG. 4) is adjacent (ie, no other luminescent layer or other pressure sensitive material is disposed between the two), and the first electrode 4042 of the varistor 404 is connected to the first voltage Vdd.
  • the sub-light emitting layer 403 adjacent to the pressure sensitive material 4043 is a green light emitting layer.
  • the pressure sensitive material 4043 can also be adjacent to a sub-luminescent layer that emits light of other colors.
  • the manner in which the varistor 404 and the operational amplifier 012 are connected can be in the manner shown in FIG.
  • the structure of the varistor 404 includes, in order from top to bottom, an insulating layer 4041, a first electrode 4042, a pressure sensitive material 4043, and a second electrode 4044.
  • the upper layer of the varistor 404 is the cathode 60, and the second electrode 4044 of the varistor is in communication with the anode 20 of the sub-lighting unit.
  • the anode 20 of the sub-light emitting unit 201 may be the anode of the G sub-light emitting unit.
  • the first electrode 4042 of the varistor 404 is connected to the first voltage Vdd.
  • the inverting input terminal of the operational amplifier 012 is connected to the anode 20 of the sub-light emitting unit 201, the non-inverting input terminal of the operational amplifier 012 is connected to the second voltage Vss, and the output end of the operational amplifier 012 is connected to the cathode 60 of the sub-light emitting unit 201; the first voltage Vdd is greater than The second voltage Vss; the cathode 60 is grounded.
  • the fingerprint recognition device further includes a control unit 50 that is configured to turn off the drive signal output to the anode of the sub-lighting unit prior to fingerprinting. That is to say, in the process of performing fingerprint recognition, the anodes of the plurality of sub-light emitting units in the finger pressing area are not applied with driving signals for causing the plurality of sub-light emitting units to emit light carrying the display information.
  • the control unit 50 is electrically connected to the pixel unit drive circuit 90, and controls the output signal of the pixel unit drive circuit 90 to be turned off during the fingerprint recognition process.
  • control unit 50 is an integrated circuit (IC) or similar circuit for controlling the pixel unit drive circuit.
  • IC integrated circuit
  • the diode represents a sub-lighting unit (e.g., an OLED).
  • the luminous intensity of the sub-lighting unit is proportional to the pressing force of the finger.
  • the pressing force and the pressing speed of the finger can be determined by the difference in light intensity perceived by the photosensitive unit, thereby acquiring the user's fingerprint pressing habit.
  • the learned user's fingerprint pressing usage habit can be used as an auxiliary basis for fingerprint recognition, thereby enhancing the reliability of fingerprint recognition.
  • the light emitting device includes a light emitting unit 02 and a varistor 404; the light emitting unit 02 includes an anode 20, a cathode 60, and is located between the anode 20 and the cathode 60.
  • the sensitized layer 404 includes a first electrode 4042, a second electrode 4044, and a pressure sensitive material 4043 between the first electrode 4042 and the second electrode 4044; a second electrode 4044 of the varistor 404 and the light emitting unit
  • the anode 20 of 02 is electrically connected, and the current passing through the light-emitting unit 02 is controlled by the current passing through the varistor 404.
  • the current passing through the light emitting unit 02 is substantially equal to the current passing through the varistor 404.
  • the varistor 404 further includes an insulating layer 4041 between the first electrode 4042 of the varistor 404 and the cathode 60 of the light emitting unit 02.
  • the illumination device provided by at least one embodiment of the present disclosure further includes an operational amplifier 012 including an inverting input terminal, a non-inverting input terminal, and an output terminal, and an inverting input terminal of the operational amplifier 012.
  • the second electrode 4044 of the varistor 404 is electrically connected to the anode 20 of the light-emitting unit 02
  • the output of the operational amplifier 012 is electrically connected to the cathode 60 of the light-emitting unit 02
  • the voltage Vss applied to the non-inverting input terminal of the operational amplifier 012 is less than the pressure-sensitive
  • the first electrode 4042 of the electrode 404 is applied with a voltage Vdd.
  • the illuminating intensity of the illuminating unit 02 can be controlled by the varistor 404.
  • the illuminating intensity of the illuminating unit 02 also changes accordingly.
  • At least one embodiment of the present disclosure further provides a light sensor, as shown in FIG. 9, the light sensor includes the light emitting device 00 provided by any of the above embodiments, the light emitting device 00 is configured to emit an optical signal; the light sensor further includes The photosensitive unit 03 is configured to detect that the light signal emitted by the light emitting device 00 is reflected to form a light reflecting signal.
  • At least one embodiment of the present disclosure provides a display device including the fingerprint recognition device or the light-emitting device or the light sensor provided by any of the above embodiments.
  • the display device may be an OLED (Organic Light-Emitting Diode) panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, or the like, or any display product or component.
  • OLED Organic Light-Emitting Diode
  • At least one embodiment of the present disclosure further provides a fingerprint identification method, including: the pressure detecting unit detects the strength of the finger pressing the display screen, and sends a signal to the light emitting unit according to the velocity; the light emitting unit emits an optical signal under the control of the signal; The unit receives the light reflection signal formed by the light signal reflected by the finger, and converts the light reflection signal into an electrical signal output to the fingerprint analysis unit; the fingerprint analysis unit determines the fingerprint information according to the received electrical signal.
  • At least one embodiment of the present disclosure provides a fingerprint identification method, which includes the following steps S110 to S140.
  • Step S110 the pressure detecting unit detects the strength of the finger pressing the display screen, and sends different signals respectively related to different strengths to the lighting unit according to the change of the strength;
  • Step S120 the light emitting unit emits light signals of different intensities under the control of the different signals
  • Step S130 the photosensitive unit receives different light reflection signals formed by the light signals of different intensities reflected by the fingers, and converts the different light reflection signals into different electrical signals and outputs the signals to the fingerprint analysis module;
  • Step S140 the fingerprint parsing unit parses the fingerprint information according to the received different electrical signals
  • the fingerprint identification method further includes: the fingerprint analysis unit further collects an association relationship between the fingerprint data and the pressing force and/or the pressing speed, and generates a fingerprint pressing behavior data of the user; and performs fingerprint identification. At the time, the fingerprint judgment is performed with reference to the user's fingerprint pressing behavior data.

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Abstract

一种指纹识别器件及方法、发光装置、光传感器和显示装置，该指纹识别器件包括压力检测单元(01)、发光单元(02)、感光单元(03)和指纹解析单元(04)；压力检测单元(01)被配置为检测手指按压显示屏的力度，并且根据该力度向发光单元(02)发送信号；发光单元(02)被配置为在压力检测单元(01)的信号的控制下发出光信号；感光单元(03)被配置为接收光信号被手指反射后形成的光反射信号并且将光反射信号转变为电信号输出给指纹解析模块(04)；指纹解析单元(04)被配置为根据接收到的电信号确定指纹信息。该指纹识别器件在显示屏的显示区域实现指纹识别功能。

Description

指纹识别器件及方法、发光装置、光传感器和显示装置
对相关申请的交叉参考
本申请要求于2017年5月11日递交的中国专利申请第201710330780.X号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开实施例涉及一种指纹识别器件、指纹识别方法、发光装置、光传感器和显示装置。
背景技术
近年来，随着技术的高速发展，具有生物识别功能的移动产品逐渐进入人们的生活工作中，指纹识别技术凭借着指纹的唯一身份特性，备受人们重视。
指纹识别技术可以通过多种传感器实现，光传感器是指纹识别技术中常见的一种传感器。
发明内容
本公开实施例提供了一种指纹识别器件、指纹识别方法、发光装置和光传感器和显示装置。
本公开至少一个实施例提供了一种指纹识别器件，其包括压力检测单元、发光单元、感光单元和指纹解析单元；所述压力检测单元被配置为检测手指按压显示屏的力度并且根据所述力度向发光单元发送信号；所述发光单元被配置为在所述信号的控制下发出光信号；所述感光单元被配置为接收所述光信号被所述手指反射后形成的光反射信号，并且将所述光反射信号转变为电信号输出给指纹解析模块；所述指纹解析单元被配置为根据接收到的电信号确定指纹信息。
本公开至少一个实施例还提供了一种指纹识别方法，其包括：压力检测 单元检测手指按压显示屏的力度，并且根据所述力度向发光单元发送信号；所述发光单元在所述信号的控制下发出光信号；感光单元接收所述光信号被所述手指反射后形成的光反射信号，并且将所述光反射信号转变为电信号输出给指纹解析单元；所述指纹解析单元根据接收到的电信号确定指纹信息。
本公开至少一个实施例还提供一种发光装置，其包括发光单元和压敏电阻。发光单元包括阳极、阴极和位于所述阳极和所述阴极之间的发光层。压敏电阻包括第一电极、第二电极和位于所述第一电极和所述第二电极之间的压敏材料，所述压敏电阻的第二电极与所述发光单元的阳极电连接，所述发光单元中通过的电流受控于所述压敏电阻中通过的电流。
本公开至少一个实施例还提供一种光传感器，其包括以上所述的发光装置并且还包括感光单元，所述发光装置被配置为发出光信号，所述感光单元被配置为检测所述发光装置发出的光信号被反射后形成的光反射信号。
本公开至少一个实施例还提供了一种显示装置，其包括上述指纹识别器件或发光装置或光传感器。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1为本公开至少一个实施例中的一种指纹识别器件示意图；
图2为本公开至少一个实施例中的一种有机电致发光二极管器件的膜层结构示意图；
图3为本公开至少一个实施例中的一种感光单元的示意图；
图4为本公开至少一个实施例中的指纹识别器件各个膜层结构的示意图；
图5为本公开至少一个实施例的指纹识别器件中压力检测单元和发光单元的电气连接示意图；
图6为图5所示电路在指纹识别过程中的等效电路图；
图7为本公开至少一个实施例提供的指纹识别器件中压力检测单元、发光单元、像素单元驱动电路和控制单元的电气连接示意图；
图8为本公开至少一个实施例提供的发光装置的示意图；
图9为本公开至少一个实施例提供的光传感器的示意图；
图10为本公开至少一个实施例中的指纹识别方法流程图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
在研究中，本申请的发明人注意到，当前显示终端的光学指纹识别多集成在显示终端的非显示区域的触控板上(比如，home键上)，然而，非显示区域的触控板的面积有限，且机械按键的存在会降低屏占比、增加生产成本。
本公开至少一个实施例提供一种指纹识别器件，其包括压力检测单元、发光单元、感光单元和指纹解析单元；压力检测单元被配置为检测手指按压显示屏的力度并且根据力度向发光单元发送信号；发光单元被配置为在信号的控制下发出光信号；感光单元被配置为接收光信号被手指反射后形成的光反射信号，并且将光反射信号转变为电信号输出给指纹解析模块；指纹解析单元被配置为根据接收到的电信号确定指纹信息。该指纹识别器件能够在显示屏的显示区域实现指纹识别功能。在一些实施例中，通过改变手指的按压力度可以获得多个指纹，根据这些指纹可以获得用户的按压行为习惯数据，以提升指纹识别的可靠性。
例如，该指纹识别器件的显示屏包括显示区域和位于显示区域外的周边区域，显示区域包括多个开口区和围绕该多个开口区的非开口区，压力检测单元、发光单元和感光单元都位于显示区域中。
例如，如图1所示，本公开至少一个实施例提供一种指纹识别器件，其包括压力检测单元01、发光单元02、感光单元03和指纹解析单元04。
压力检测单元01被配置为检测手指按压指纹识别器件的显示屏的力度，并且根据该力度的变化向发光单元02发送分别与不同的力度相关的不同的信号。
发光单元02被配置为在压力检测单元01发送的不同的信号的控制下发出强度随该不同的信号变化的光信号。例如，手指按压力度越大，发光单元02发出的光信号的强度越大。
感光单元03被配置为接收不同的光信号被手指反射后形成的不同的光反射信号(发光单元02发出的光信号越强，感光单元03接收到的光反射信号也越强)，并且将该不同的光反射信号转变为不同的电信号输出给指纹解析单元04。
指纹解析单元04被配置为根据接收到的不同的电信号确定指纹信息。
例如，指纹解析单元04为集成电路(IC)或者类似的用于对感光单元03输出的电信号进行处理以得到指纹信息的电路。
例如，指纹解析单元根据每个电信号都得到一个指纹，则根据不同的电信号得到不同的指纹。例如，指纹解析单元根据不同的电信号得到的不同的指纹可以确定出指纹数据与按压力度和/或按压速度之间的关系，从而生成用户的指纹按压行为习惯数据。
需要说明的是，本公开实施例中指纹解析单元04得到的指纹信息可以是指纹，或者是指纹数据与按压力度和/或按压速度之间的关系，或者是用户的指纹按压行为习惯数据。
例如，在至少一种实施方式中，发光单元02包括有机电致发光二极管(Organic Light-Emitting Diode，OLED)。在本公开的其它实施例中，发光单元02也可以包括无机发光二极管或者其它类型的主动发光器件。
采用OLED(有机电致发光二极管)制作的OLED显示面板由于具有全固态结构、高亮度、全视角、响应速度快、可柔性显示等一系列优点，已成为极具竞争力和发展前景的下一代显示技术。
在OLED显示面板的OLED阵列基板中，例如，一个像素单元包括三个子像素单元，例如包括R(红)子像素单元、G(绿)子像素单元和B(蓝)子像素单元，并且每个子像素单元都包括一个OLED。
例如，如图2所示，发光单元自下而上依次包括：位于基板10上的阳极 20、空穴传输层30、发光层40(例如有机发光层)、电子传输层50和阴极60。例如，在其它实施例中，发光单元也可以依次包括位于基板10上的阳极20、发光层40和阴极60。
例如，基板10为是玻璃(glass)基板、石英基板、塑料基板或其它类型的透明基板。例如，阳极20的材料是铟锡氧化物(indium tin oxide，简称ITO)或者其它透明导电材料。空穴传输层(Hole Transport Layer，简称HTL)30、发光层(Emitting Material Layer，简称EML)40和电子传输层(Electron Transport Layer，简称ETL)50位于阳极20和阴极60之间，通过使阳极20与阴极60之间产生一定的电压差，使阳极20与阴极60之间形成电流来，实现发光层40的发光。
例如，在发光单元02包括OLED的情况下，压力检测单元01向发光单元02发送的信号为电流信号。采用电流信号控制OLED的发光强度，有利于实现对OLED的发光强度的精确控制。
例如，在本公开实施例中，发光单元02可以包括一个子发光单元或者多个子发光单元，每个子发光单元包括阳极、阴极和位于二者之间的子发光层。例如，每个子发光单元包括一个OLED。例如，在OLED显示面板中，每个子像素单元包括一个子发光单元。
例如，在发光单元02包括多个子发光单元的情况下，发光层40中包括多个子发光层，例如可以包括R(红)、G(绿)、B(蓝)三种子发光层。
例如，在至少一种实施方式中，感光单元03是光电传感器。例如，感光单元03包括光敏二极管，比如，PIN二极管；或者，感光单元03包括光敏三极管或者其它类型的光电传感器。
如图3所示，在基于多个光电传感器(Photo Sensor)的感光单元(也称为指纹传感器)03的结构中，每个光电传感器301可以通过一个开关器件302控制开启和闭合。例如，光电传感器301可以是光敏二极管，比如PIN二极管。例如，开关器件302可以是薄膜晶体管(Thin Film Transistor，简称TFT)。
在感光单元包括多个光电传感器的情况下，指纹识别的原理为：由于手指指纹谷脊间的差异，发光单元02发出的光信号照射到手指上会在手指的不同位置处产生不同的反射光，从而使到达多个光电传感器(例如多个光敏二极管)处的光强出现变化，产生不同的光电流差异。例如，感光元件03包括 的多个光电传感器排列成具有多行和多列的阵列。针对多个光电传感器构成的阵列结构，通过对各个光电传感器的开关器件(例如TFT)进行控制，依次读取出各个光电传感器(例如光敏二极管)的电流差异，即可实现对指纹谷脊的检测。
例如，在至少一种实施方式中，感光单元03设置在发光单元(例如OLED)02的上方(即发光单元02的出光侧)。例如，感光单元03和发光单元02都位于同一基板(参见图4中的基板10)上，发光单元02位于感光单元03和基板10之间；在手指按压时，感光单元03位于发光单元02的面向手指的一侧。
例如，在至少一种实施方式中，压力检测单元01包括压敏电阻和运算放大器。压敏电阻包括第一电极、压敏材料和第二电极，压敏电阻的第二电极与发光单元的阳极电连接，压敏电阻的第一电极被施加第一电压；运算放大器的反相输入端连接发光单元的阳极，运算放大器的同相输入端被施加第二电压，运算放大器的输出端连接发光单元的阴极；第一电压大于第二电压。
例如，压敏电阻还包括绝缘层，绝缘层、第一电极、压敏材料和第二电极的绝缘层沿从感光单元到发光单元的排列方向依次排列(即自上而下依次排列)。
例如，压敏电阻的压敏材料设置在发光单元的发光层中。例如，发光单元包括并排设置的多个子发光单元，从而发光层包括分别对应该多个子发光单元的多个子发光层图案，在这种情况下，压敏材料例如位于相邻的子发光层图案之间。
下面结合图4至图7对本公开实施例提供的指纹识别器件中的发光单元、压敏电阻和运算放大器之间的连接关系进行详细说明。
例如，如图4所示，本公开的至少一个实施例提供的指纹识别器件自下而上依次包括：基板(例如，形成有呈阵列排布的多个开关元件的阵列基板)10、像素单元驱动电路90、多个阳极20、发光层40、阴极60、封装层70、感光单元03。在如图4所示的实施例中，发光单元02包括多个子发光单元(例如三个子发光单元)，该多个子发光单元的阳极20彼此间隔开，发光层40包括分别对应多个阳极20的多个子发光层(参见子发光层401、402、403)，该多个子发光单元的阴极连续形成得到阴极60。例如，发光层40中包括的 多个子发光层包括第一子发光层401、第二子发光层402、第三子发光层403。例如，第一子发光层401、第二子发光层402、第三子发光层403分别为蓝色发光层、红色发光层和绿色发光层。
在图4所示的实施例中，感光单元03位于封装层70的上侧；在其它实施例中，感光单元03也可以位于封装层70的下侧。
像素单元驱动电路90的输出信号开启时，子发光单元的阳极20接收到驱动信号，驱动该子发光单元发光；像素单元驱动电路90的输出信号关闭时，子发光单元的阳极20接收不到驱动信号，该子发光单元不发光。各个子发光单元的阴极60是连通的(例如，直接电连接)。
如图4所示，发光层40中还设置有压敏电阻404，例如压敏电阻404位于发光层40的子发光层(参见子发光层403)周边的开口中。例如，压敏电阻404的结构自上而下依次包括：绝缘层4041、第一电极4042、压敏材料4043和第二电极4044。例如，压敏电阻404包括的绝缘层4041、第一电极4042、压敏材料4043和第二电极4044都位于发光单元02的阳极20所在层和阴极60之间。例如，绝缘层4041形成凹陷空间，该凹陷空间的开口朝向基板10，压敏电阻404的第一电极4042和压敏材料4043位于该凹陷空间中。例如，压敏电阻404的绝缘层4041位于发光单元02的阴极60与压敏电阻404的第一电极4042之间。例如，压敏电阻404的第二电极4044与和其电连接的阳极20可以通过同一膜层形成(即同层同材料设置)。
例如，压敏电阻404的第二电极4044与至少一个子发光单元的阳极20连通(例如，直接电连接)，压敏电阻404的压敏材料4043设置在发光层40中，且与子发光单元的子发光层(参见图4中的403)相邻(即二者之间未设置其它发光层或者其它压敏材料)，压敏电阻404的第一电极4042连接第一电压Vdd。
例如，与压敏材料4043相邻的子发光层403为绿色发光层。在其它实施例中，压敏材料4043也可以与发出其它颜色光的子发光层相邻。
例如，在至少一种实施方式中，压敏电阻404和运算放大器012的连接方式可以采用图5所示的方式。例如，如图5所示，压敏电阻404的结构自上而下依次包括：绝缘层4041、第一电极4042、压敏材料4043和第二电极4044。压敏电阻404的上层是阴极60，压敏电阻的第二电极4044与子发光 单元的阳极20相连通。例如，子发光单元201的阳极20可以是G子发光单元的阳极。压敏电阻404的第一电极4042连接第一电压Vdd。运算放大器012的反相输入端连接子发光单元201的阳极20，运算放大器012的同相输入端连接第二电压Vss，运算放大器012的输出端连接子发光单元201的阴极60；第一电压Vdd大于第二电压Vss；阴极60接地。
例如，在至少一种实施方式中，如图7所示，指纹识别器件还包括控制单元50，控制单元50被配置为在进行指纹识别之前，关闭输出给子发光单元的阳极的驱动信号。也就是说，在进行指纹识别的过程中，手指按压区域内的多个子发光单元的阳极未被施加驱动信号，该驱动信号用于使该多个子发光单元发出携带显示信息的光。例如，如图7所示，控制单元50与像素单元驱动电路90电连接，并且在进行指纹识别过程中控制像素单元驱动电路90的输出信号关闭。
例如，控制单元50为集成电路(IC)或者类似的用于控制像素单元驱动电路的电路。
在图7所示的结构中，当像素单元驱动电路开启输出信号时，子发光单元正常发光。当像素单元驱动电路关闭输出信号时，压敏电阻和运算放大器的电气连接关系如图6所示。图6中，二极管代表子发光单元(例如OLED)。以子发光单元为OLED为例进行说明，OLED器件为电流型发光器件，通过子发光单元的电流等于流过压敏电阻的电流，即通过子发光单元的电流I＝(Vdd-Vss)/R；其中，R代表压敏电阻的阻值，Vdd是第一电压，Vss是第二电压，第一电压(Vdd)大于第二电压(Vss)。压敏电阻接收到的按压力度越大，压敏电阻的阻值越小，流过压敏电阻的电流越大，也即，流过OLED子发光单元的电流越大，发光强度越大。因此，子发光单元的发光强度与手指的按压力度成正比。
在至少一个实施例中，通过感光单元感受到的光强的不同，可以判断手指的按压力度、按压速度，从而获取到用户的指纹按压使用习惯。可以将学习到的用户的指纹按压使用习惯作为指纹识别的辅助依据，从而增强指纹识别的可靠性。
本公开至少一个实施例还提供一种发光装置，如图8所示，该发光装置包括发光单元02和压敏电阻404；发光单元02包括阳极20、阴极60和位于 阳极20和阴极60之间的发光层40；压敏电阻404包括第一电极4042、第二电极4044和位于第一电极4042和第二电极4044之间的压敏材料4043；压敏电阻404的第二电极4044与发光单元02的阳极20电连接，发光单元02中通过的电流受控于压敏电阻404中通过的电流。例如，发光单元02中通过的电流大致等于压敏电阻404中通过的电流。
例如，压敏电阻404还包括绝缘层4041，其位于压敏电阻404的第一电极4042与发光单元02的阴极60之间。
例如，如图8所示，本公开的至少一个实施例提供的发光装置还包括运算放大器012，运算放大器012包括反向输入端、同相输入端和输出端，运算放大器012的反向输入端与压敏电阻404的第二电极4044和发光单元02的阳极20电连接，运算放大器012的输出端与发光单元02的阴极60电连接，运算放大器012的同相输入端被施加的电压Vss小于压敏电极404的第一电极4042被施加的电压Vdd。
在本公开实施例提供的发光装置中，可通过压敏电阻404控制发光单元02的发光强度，例如，在压敏电阻404被的按压力度发生变化时，发光单元02的发光强度也相应变化。
本公开至少一个实施例还提供一种光传感器，如图9所示，该光传感器包括以上任一实施例提供的发光装置00，该发光装置00被配置为发出光信号；该光传感器还包括感光单元03，其被配置为检测发光装置00发出的光信号被反射后形成光反射信号。
本发明本公开至少一个实施例提供一种显示装置，其包括上述任一实施例提供的指纹识别器件或者发光装置或者光传感器。
例如，该显示装置可以为OLED(Organic Light-Emitting Diode)面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本公开至少一个实施例还提供了一种指纹识别方法，其包括：压力检测单元检测手指按压显示屏的力度，并且根据力度向发光单元发送信号；发光单元在信号的控制下发出光信号；感光单元接收光信号被手指反射后形成的光反射信号，并且将光反射信号转变为电信号输出给指纹解析单元；指纹解析单元根据接收到的电信号确定指纹信息。
例如，如图10所示，本公开至少一个实施例提供一种指纹识别方法，该指纹识别方法包括以下步骤S110至步骤S140。
步骤S110，压力检测单元检测手指按压显示屏的力度，并且根据力度的变化向发光单元发送分别与不同的力度相关的不同的信号；
步骤S120，发光单元在该不同的信号的控制下发出不同强度的光信号；
步骤S130，感光单元接收该不同强度的光信号被手指反射后形成的不同的光反射信号，并且将不同的光反射信号转变为不同的电信号输出给指纹解析模块；
步骤S140，指纹解析单元根据接收到的不同的电信号解析出指纹信息；
例如，在至少一种实施方式中，指纹识别方法还包括：指纹解析单元还收集指纹数据与按压力度和/或按压速度之间的关联关系，生成用户的指纹按压行为习惯数据；在进行指纹识别时，参考用户的指纹按压行为习惯数据进行指纹判决。
以上关于指纹识别装置、指纹识别方法、发光装置、光传感器和显示装置的实施例可以互相参照。在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。

Claims (17)

  1. 一种指纹识别器件，包括压力检测单元、发光单元、感光单元和指纹解析单元，其中，
    所述压力检测单元被配置为检测手指按压所述指纹识别器件的显示屏的力度，并且根据所述力度向所述发光单元发送信号；
    所述发光单元被配置为在所述信号的控制下发出光信号；
    所述感光单元被配置为接收所述光信号被所述手指反射后形成的光反射信号，并且将所述光反射信号转变为电信号输出给所述指纹解析单元；
    所述指纹解析单元被配置为根据接收到的所述电信号确定指纹信息。
  2. 根据权利要求1所述的指纹识别器件，其中，
    所述压力检测单元被配置为根据所述力度的变化向所述发光单元依次发送分别与不同的力度相关的不同的信号；
    所述发光单元被配置为在所述不同的信号的控制下发出不同的光信号；
    所述感光单元被配置为接收所述不同的光信号被所述手指反射后形成的不同的光反射信号，并且将所述不同的光反射信号分别转变为不同的电信号输出给所述指纹解析单元；
    所述指纹解析单元被配置为根据接收到的所述不同的电信号确定所述指纹信息。
  3. 根据权利要求1或2所述的指纹识别器件，其中，所述发光单元包括有机电致发光二极管。
  4. 根据权利要求3所述的指纹识别器件，其中，所述压力检测单元向所述发光单元发送的所述信号为电流信号。
  5. 根据权利要求1-4中任一项所述的指纹识别器件，其中，
    所述发光单元包括阳极、发光层和阴极；
    所述压力检测单元包括压敏电阻和运算放大器；
    所述压敏电阻包括第一电极、压敏材料和第二电极，所述压敏电阻的第二电极与所述发光单元的阳极电连接，所述压敏电阻的第一电极被施加第一电压；
    所述运算放大器的反相输入端连接所述发光单元的阳极，所述运算放大 器的同相输入端被施加第二电压，所述运算放大器的输出端连接所述发光单元的阴极；
    所述第一电压大于所述第二电压。
  6. 根据权利要求5所述的指纹识别器件，其中，所述压敏电阻还包括绝缘层，所述绝缘层、所述第一电极、所述压敏材料和所述第二电极的绝缘层沿从所述感光单元到所述发光单元的排列方向依次排列。
  7. 根据权利要求5或6所述的指纹识别器件，其中，所述压敏电阻的压敏材料设置在所述发光单元的所述发光层中。
  8. 根据权利要求5-7中任一项所述的指纹识别器件，还包括控制单元，其中，所述控制单元被配置为在进行指纹识别之前，关闭输出给所述发光单元的阳极的驱动信号。
  9. 根据权利要求1-8中任一项所述的指纹识别器件，其中，所述感光单元包括光敏二极管或光敏三极管。
  10. 根据权利要求1-9中任一项所述的指纹识别器件，其中，
    所述感光单元设置在所述发光单元的出光侧。
  11. 一种指纹识别方法，包括：
    压力检测单元检测手指按压显示屏的力度，并且根据所述力度向发光单元发送信号；
    所述发光单元在所述信号的控制下发出光信号；
    感光单元接收所述光信号被所述手指反射后形成的光反射信号，并且将所述光反射信号转变为电信号输出给指纹解析单元；
    所述指纹解析单元根据接收到的电信号确定指纹信息。
  12. 根据权利要求11所述的指纹识别方法，其中，
    所述压力检测单元根据所述力度的变化向所述发光单元依次发送分别与不同的力度相关的不同的信号；
    所述发光单元在所述不同的信号的控制下发出不同的光信号；
    所述感光单元接收所述不同的光信号被所述手指反射后形成的不同的光反射信号，并且将所述不同的光反射信号分别转变为不同的电信号输出给所述指纹解析单元；
    所述指纹解析单元根据接收到的所述不同的电信号确定所述指纹信息。
  13. 根据权利要求11或12所述的指纹识别方法，还包括：
    所述指纹解析单元还收集指纹数据与按压力度和/或按压速度之间的关联关系，生成用户的指纹按压行为习惯数据；
    在进行指纹识别时，参考所述用户的指纹按压行为习惯数据进行指纹识别。
  14. 一种发光装置，包括：
    发光单元，其包括阳极、阴极和位于所述阳极和所述阴极之间的发光层；以及
    压敏电阻，其包括第一电极、第二电极和位于所述第一电极和所述第二电极之间的压敏材料，
    其中，所述压敏电阻的第二电极与所述发光单元的阳极电连接，所述发光单元中通过的电流受控于所述压敏电阻中通过的电流。
  15. 根据权利要求14所述的发光装置，还包括运算放大器，其中，
    所述运算放大器包括反向输入端、同相输入端和输出端，
    所述运算放大器的反向输入端与所述压敏电阻的第二电极和所述发光单元的阳极电连接，
    所述运算放大器的输出端与所述发光单元的阴极电连接，
    所述运算放大器的同相输入端被施加的电压小于所述压敏电极的第一电极被施加的电压。
  16. 一种光传感器，包括：
    权利要求14或15所述的发光装置，其被配置为发出光信号；以及
    感光单元，其被配置为检测所述发光装置发出的光信号被反射后形成的光反射信号。
  17. 一种显示装置，包括权利要求1-10中任一项所述的指纹识别器件或者权利要求14或15所述的发光装置或者权利要求16所述的光传感器。
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