CN108898003B - Screen-touching fingerprint unlocking method based on quantum dot light-emitting device - Google Patents
Screen-touching fingerprint unlocking method based on quantum dot light-emitting device Download PDFInfo
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- CN108898003B CN108898003B CN201810841084.XA CN201810841084A CN108898003B CN 108898003 B CN108898003 B CN 108898003B CN 201810841084 A CN201810841084 A CN 201810841084A CN 108898003 B CN108898003 B CN 108898003B
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- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
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Abstract
The invention relates to a screen-rest fingerprint unlocking method based on a quantum dot light-emitting device, which is characterized in that when an electronic device is in a screen-rest state, a finger presses the quantum dot light-emitting device embedded in a screen of the electronic device, an unlocking area is lightened, the finger is irradiated, and a fingerprint unlocking instruction is triggered; starting a camera unit which is embedded in a screen of the electronic equipment and is positioned below the quantum dot light-emitting device, and shooting by the transparent quantum dot light-emitting device to acquire fingerprint image information to be detected; the electronic equipment matches the acquired to-be-detected fingerprint image information with a preset fingerprint image stored in the electronic equipment, and if the fingerprint matching is successful, the electronic equipment executes an unlocking instruction. The method provided by the invention can improve the accuracy, omit the intermediate step of sensor transmission, save the manufacturing space, accelerate the fingerprint comparison speed, improve the unlocking efficiency and enhance the user experience.
Description
Technical Field
The invention relates to the technical field of fingerprint identification, in particular to a screen-touching fingerprint unlocking method based on a quantum dot light-emitting device.
Background
In view of the problem of poor stability of organic small molecule organic polymer light-emitting materials, semiconductor quantum dots are promising as ideal substitutes for overcoming the stability of organic light-emitting diode (OLED) devices, and therefore, in recent years, the application of quantum dot light-emitting diodes (QLEDs) to next-generation displays has attracted considerable attention. This growing interest stems from the unique properties of quantum dots, and QLEDs can be prepared by spin coating, ink jet printing, and roll-to-roll manufacturing, among other processes, and are excellent candidates for low-cost, high-quality, flexible display devices.
Because the fingerprint is a special identity label of one person, can accurately show user's identity, and fingerprint identification only need press the screen gently just can make electronic equipment discern the fingerprint and carry out authentication for fingerprint unblock application prospect is extensive, especially in many portable electronic product. At present, with the continuous progress of science and technology, devices such as smart phone tablet computers are more and more popular, and fingerprint unlocking also becomes a basic function. The fingerprint unlocking method comprises two modes of screen lightening and screen turning, wherein the screen lightening unlocking is a method for entering a system by using a fingerprint under the condition that a screen is lightened by an intelligent terminal; the screen-off unlocking is a method for entering a system by using fingerprints under the condition that the screen is off.
The optical fingerprint unlocking method mainly utilizes light reflection imaging to identify the fingerprint of a user, most of the optical fingerprint unlocking commonly used for screen-off unlocking at present adopts a mode of transmitting a signal by a sensor to wake up a system, and the required time is longer.
Disclosure of Invention
The invention aims to provide a screen-touching fingerprint unlocking method based on a quantum dot light-emitting device, which overcomes the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows: a screen-rest fingerprint unlocking method based on quantum dot light-emitting devices is characterized in that when electronic equipment is in a screen-rest state, a finger presses the quantum dot light-emitting devices embedded in a screen of the electronic equipment, an unlocking area is lightened, the finger is irradiated, and a fingerprint unlocking instruction is triggered; starting a camera shooting unit which is embedded in a screen of the electronic equipment and is positioned below the quantum dot light-emitting device, shooting through the quantum dot light-emitting device, and acquiring the image information of the fingerprint to be detected; the electronic equipment matches the acquired to-be-detected fingerprint image information with a preset fingerprint image stored in the electronic equipment, and if the fingerprint matching is successful, the electronic equipment executes an unlocking instruction.
In an embodiment of the present invention, the image capturing unit obtains information of a plurality of to-be-detected fingerprint images at different positions of a finger.
In an embodiment of the present invention, the electronic device performs a feature preliminary processing according to the image collected by the camera unit, and determines whether the image is fingerprint image information; and if the acquired image is not the fingerprint image information, automatically closing the system, returning the screen of the electronic equipment to the screen-rest state, and waiting for the fingerprint unlocking instruction again.
In an embodiment of the present invention, the fingerprint image information includes a complete image of the fingerprint image information to be detected or a partial image of the fingerprint image information to be detected.
In an embodiment of the present invention, the acquired information of the fingerprint image to be detected is matched with a plurality of preset fingerprint images stored in the electronic device, and if at least one preset fingerprint image is successfully matched, the electronic device executes an unlocking instruction.
In an embodiment of the present invention, the quantum dot light emitting device includes, sequentially from bottom to top: an ITO glass layer, a hole injection layer, a hole transport layer, a quantum dot layer, an electron transport layer, and a flexible PET top electrode layer with a transparent conductive film.
In an embodiment of the invention, the ITO glass layer, the hole injection layer, the hole transport layer, the quantum dot layer, and the electron transport layer are used as lower components of the quantum dot light emitting device, the flexible PET top electrode layer with the transparent conductive film is used as an upper component of the quantum dot light emitting device, and the upper component and the lower component are separately arranged in the screen of the electronic device; the finger makes electron transport layer and lower floor's subassembly contact through pressing flexible PET top electrode layer, quantum dot light emitting device switches on, and then gives out light.
In an embodiment of the invention, the electrodes used in the flexible PET substrate with the transparent conductive film are linear electrodes.
In an embodiment of the present invention, the quantum dot light emitting device is prepared according to the following steps:
step 1: continuously cleaning a substrate ITO glass and a flexible PET substrate with an ITO transparent conductive film by using acetone, ethanol and deionized water for 15 minutes respectively, and then treating for 10 minutes by using ozone generated by ultraviolet rays in the air;
step 2: and (3) mixing PEDOT: the PSS solution is spin-coated on an ITO glass substrate for 40 seconds at 3000rpm, and then is baked for 20 minutes under a constant-temperature heating table at 120 ℃;
and step 3: transferring the coated substrate to N 2In the filled glove box, TFB in chlorobenzene solvent was deposited for 40s at a fixed speed of 3000rpm and then baked for 20min under a constant temperature heating table at 120 ℃;
and 4, step 4: dissolving CdSe/ZnS quantum dots in n-octane, spin-coating at 2000rpm for 40s, and annealing in a constant-temperature heating table at 100 ℃ for 5 min;
and 5: spin coating ZnO solution dissolved in n-butanol at 1500rpm for 40s, and annealing in a constant temperature heating table at 100 deg.C for 10 min;
step 6: the cleaned flexible PET top electrode layer containing the transparent conductive film was loaded on top of the lower module.
Compared with the prior art, the invention has the following beneficial effects: a screen-saving fingerprint unlocking method based on quantum dot light emitting devices is characterized in that an unlocking area is directly lightened by using an internal quantum dot light emitting device, and compared with a traditional capacitive fingerprint unlocking method, the accuracy can be improved through optical fingerprint unlocking of image contrast; compared with the unlocking of a common sensor type optical fingerprint, the unlocking area is directly lightened through the internal quantum dot light-emitting device to complete the shooting process, the middle step of sensor transmission can be omitted, the manufacturing space is saved, the fingerprint contrast speed is increased, the unlocking efficiency is improved, and the user experience is enhanced.
Drawings
Fig. 1 is a schematic flow chart of a screen-touching fingerprint unlocking method based on a quantum dot light-emitting device in an embodiment of the invention.
Fig. 2 is a schematic diagram of a quantum dot light-emitting device in an embodiment of the invention.
Fig. 3 is a schematic diagram of a fingerprint image acquisition and unlocking process in the embodiment of the present invention.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
The invention provides a screen-touching fingerprint unlocking method based on a quantum dot light-emitting device, which comprises the following steps as shown in figure 1:
step 11: the electronic equipment receives a fingerprint unlocking instruction.
In this embodiment, the received instruction may be a fingerprint unlocking instruction sent by pressing the screen with a finger of the user, or an unlocking instruction triggered by a switch on the electronic device. When the electronic equipment is in a screen-off state, a quantum dot light-emitting device embedded in the screen of the electronic equipment is pressed by a finger, an unlocking area is lightened, the finger is irradiated, and a fingerprint unlocking instruction is triggered
Step 12: and the electronic equipment lights up the unlocking area according to the fingerprint unlocking instruction.
In this embodiment, the electronic device lights the unlocking region by lighting the internal quantum dot light-emitting device.
Step 13: the electronic equipment controls the camera shooting unit to acquire the fingerprint information to be detected according to the fingerprint unlocking instruction.
In this embodiment, in this step, according to the received fingerprint unlocking instruction, the image capturing unit located below the quantum dot light emitting device is started to acquire an image. And determining whether the acquired image is fingerprint information or not according to the primary processing of the acquired image characteristics, automatically closing the system when the acquired image is not the fingerprint information, and waiting for the fingerprint information again when the screen returns to the information screen state. And when the acquired image is confirmed to be fingerprint information after the initial judgment, carrying out the next operation.
In the embodiment, the image pickup unit acquires information of a plurality of to-be-measured fingerprint images of different positions of a finger. The acquired fingerprint image can be a complete fingerprint image to be detected or a local image of the fingerprint to be detected.
Step 14: the electronic equipment matches the acquired fingerprint image with a preset fingerprint image and executes unlocking operation;
in the embodiment, whether to execute the fingerprint unlocking operation is responded according to the matching result. And if the matching is unsuccessful, returning to the step 12 to continue to collect new fingerprint image information to be detected. And if the to-be-detected fingerprint image is successfully matched with at least one of the preset fingerprint image data, finishing the unlocking instruction program.
Furthermore, in the process of lighting the unlocking area through the fingerprint unlocking instruction to control the camera shooting unit to acquire a fingerprint image and performing matching and executing fingerprint unlocking operation according to the acquired fingerprint image, the lighting process of the screen unlocking area in the screen resting state is a key step. In the existing fingerprint unlocking technology, an optical fingerprint unlocking mode is that a pressure sensor systematically detects a fingerprint pressing unlocking instruction through electronic equipment when a screen of the electronic equipment is in a screen-resting state, and an unlocking area is driven to be lightened in a mode of transmitting signals through the pressure sensor, so that a camera shooting unit is helped to acquire information of a fingerprint to be detected. Therefore, in the process that the pressure sensor transmits signals to drive the lighting unlocking area, the speed of the electronic equipment for acquiring the fingerprint to be detected is influenced to a certain extent, and the unlocking efficiency is influenced. Compared with a common sensor sensing lighting mode, the optimized method for directly driving the lighting unlocking region by using the quantum dot light-emitting device can be used for lighting more quickly and can serve as a new function of a product.
Further, as shown in fig. 2, the quantum dot light emitting device applied to the fingerprint unlocking method provided by the present invention is manufactured on a flexible PET substrate with an ITO transparent conductive film and an ITO transparent glass substrate by using a QLED, and a lower device is prepared on the ITO transparent glass substrate by using the flexible PET substrate with the transparent conductive film as an upper electrode; cleaning an ITO glass substrate, performing surface hydrophilic treatment by adopting ultraviolet ozone or oxygen plasma, and then sequentially preparing PEDOT on the substrate according to the following sequence: PSS, TFB, CdSe/ZnS quantum dots, ZnO nanoparticles and other functional layers to prepare a lower-layer device.
The quantum dot light-emitting device is prepared by the following steps:
step 21: continuously cleaning a substrate ITO glass and a substrate PET by using acetone, ethanol and deionized water for 15 minutes respectively, and then treating for 10 minutes by using ozone generated by ultraviolet rays in the air;
step 22: and (3) mixing PEDOT: the PSS solution is spin-coated on an ITO glass substrate at 3000rpm for 40 seconds, and then is baked for 20 minutes under a constant-temperature heating table at 120 ℃;
step 23: transferring the coated substrate to N 2In a filled glove box, TFB (8 mg/mL) in chlorobenzene solvent was deposited at a fixed speed of 3000rpm for 40s and then baked at a constant temperature heating stage of 120 ℃ for 20 min;
step 24: dissolving CdSe/ZnS quantum dots in n-octane (13 mg/mL), spin-coating at 2000rpm for 40s, and annealing in a constant-temperature heating table at 100 ℃ for 5 min;
step 25: carrying out spin coating on a ZnO solution (10 mg/mL) dissolved in n-butanol at the rotating speed of 1500rpm for 40s, and then annealing in a constant-temperature heating table at 100 ℃ for 10 min;
step 26: placing the cleaned flexible PET sample containing the ITO transparent conductive layer above the lower layer assembly to construct a QLED device;
further, the types of the functional layers and the types of the quantum dots used in the manufacturing process of the quantum dot light emitting device mentioned in this embodiment, including the spin-coating rotation speed, the solution concentration, the selection of the solvent, the annealing temperature and the annealing time, are not completely fixed, and can be properly adjusted according to the needs.
In this embodiment, the quantum dot light emitting device exists in the screen in a manner that the upper electrode is separated from the lower device, when a finger presses the screen, the upper electrode is in contact with the lower device, the quantum dot light emitting device is turned on to directly emit a light source and light the screen of the pressing area, and the subsequent shooting contrast unlocking operation is continuously executed.
Further, as shown in fig. 3, unlocking the electronic device is completed according to the following steps:
step 31: the electrodes adopted on the transparent flexible PET of the quantum dot light-emitting device are linear electrodes, and the linear electrodes have the advantages that most of the transparent glass substrate can be effectively exposed, so that the finger fingerprint to be detected can penetrate through the glass substrate, and the image information of the finger fingerprint to be detected can be conveniently acquired by the camera unit 33;
step 32: the QLED32 (excluding electrodes) part receives a fingerprint unlocking instruction by pressing the PET layer 31 with the finger 35, and the electronic device lights up the unlocking area according to the fingerprint unlocking instruction.
Step 33: the electronic equipment controls the camera shooting unit to acquire the fingerprint information to be detected according to the fingerprint unlocking instruction.
Step 34: the electronic equipment matches the acquired fingerprint image with a preset fingerprint image, confirms that the fingerprint and the preset fingerprint image are successfully matched, and executes fingerprint unlocking operation by the system.
In this embodiment, the electronic device further comprises a processor 34 for data processing.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (6)
1. A screen-rest fingerprint unlocking method based on quantum dot light-emitting devices is characterized in that when electronic equipment is in a screen-rest state, a finger presses the quantum dot light-emitting devices embedded in a screen of the electronic equipment, an unlocking area is lightened, the finger is irradiated, and a fingerprint unlocking instruction is triggered; starting a camera shooting unit which is embedded in a screen of the electronic equipment and is positioned below the quantum dot light-emitting device, shooting through the quantum dot light-emitting device, and acquiring the image information of the fingerprint to be detected; the electronic equipment matches the acquired fingerprint image information to be detected with a preset fingerprint image stored in the electronic equipment, and if the fingerprint matching is successful, the electronic equipment executes an unlocking instruction;
the quantum dot light-emitting device comprises a light-emitting layer and a light-emitting layer, wherein the light-emitting layer is sequentially arranged from bottom to top: the flexible film comprises an ITO glass layer, a hole injection layer, a hole transport layer, a quantum dot layer, an electron transport layer and a flexible PET top electrode layer with a transparent conductive film; the ITO glass layer, the hole injection layer, the hole transport layer, the quantum dot layer and the electron transport layer are used as lower-layer components of the quantum dot light-emitting device, the flexible PET top electrode layer with the transparent conductive film is used as an upper-layer component of the quantum dot light-emitting device, and the upper-layer component and the lower-layer component are separately arranged in the screen of the electronic equipment; the finger makes electron transport layer and lower floor's subassembly contact through pressing flexible PET top electrode layer, quantum dot light emitting device switches on, and then gives out light.
2. The screen-rest fingerprint unlocking method based on the quantum dot light-emitting device as claimed in claim 1, wherein the camera unit obtains information of a plurality of to-be-detected fingerprint images of different positions of a finger.
3. The screen-saving fingerprint unlocking method based on the quantum dot light-emitting device as claimed in claim 1, wherein the electronic device performs a feature preliminary processing according to the image collected by the camera unit to determine whether the image is fingerprint image information; if the acquired image is not the fingerprint image information, the system is automatically closed, the screen of the electronic equipment returns to the screen-off state, and the electronic equipment waits for the fingerprint unlocking instruction again.
4. The quantum dot light-emitting device-based screen-touch fingerprint unlocking method according to claim 1, wherein the fingerprint image information comprises a complete image of the fingerprint image information to be detected or a partial image of the fingerprint image information to be detected.
5. The screen-touch fingerprint unlocking method based on the quantum dot light-emitting device as claimed in claim 1, wherein the acquired fingerprint image information to be detected is matched with a plurality of preset fingerprint images stored in the electronic device, and if at least one preset fingerprint image is successfully matched, the electronic device executes an unlocking instruction.
6. The screen-saving fingerprint unlocking method based on the quantum dot light-emitting device as claimed in claim 1, wherein the quantum dot light-emitting device is prepared by the following steps:
step 1: continuously cleaning a substrate ITO glass and a flexible PET substrate with a transparent conductive film by using acetone, ethanol and deionized water for 15 minutes respectively, and then treating for 10 minutes by using ozone generated by ultraviolet rays in the air;
step 2: and (3) mixing PEDOT: the PSS solution is spin-coated on an ITO glass substrate for 40 seconds at 3000rpm, and then is baked for 20 minutes under a constant-temperature heating table at 120 ℃;
and step 3: the coated substrate was transferred to an N2 filled glove box and TFB in chlorobenzene solvent at 3000
Depositing for 40s at a fixed speed of rpm, and then baking for 20min under a constant temperature heating table at 120 ℃;
and 4, step 4: dissolving CdSe/ZnS quantum dots in n-octane, spin-coating at 2000rpm for 40s, and annealing in a constant-temperature heating table at 100 ℃ for 5 min;
and 5: spin coating ZnO solution dissolved in n-butanol at 1500rpm for 40s, and annealing in a constant temperature heating table at 100 deg.C for 10 min;
step 6: the cleaned flexible PET top electrode layer containing the transparent conductive film was loaded on top of the lower module.
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| CN102903855A (en) * | 2012-10-22 | 2013-01-30 | 东南大学 | Quantum dot electroluminescent device and preparation method thereof |
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| CN106293180A (en) * | 2015-06-01 | 2017-01-04 | 天津市卓扬世纪科技发展有限公司 | A kind of touch luminous element identification screen for fingerprint recognition |
| CN104993022B (en) * | 2015-08-12 | 2017-03-08 | 福州大学 | A kind of method that quantum dot photo detector array device is prepared based on inkjet technology |
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| KR102581601B1 (en) * | 2016-12-13 | 2023-09-21 | 엘지디스플레이 주식회사 | Quantum light emitting diode having improved luminescent properies and quantum light emitting device having the same |
| CN106601924A (en) * | 2016-12-21 | 2017-04-26 | 浙江大学 | Quantum dot light emitting diode and preparation method thereof |
| CN107145837A (en) * | 2017-04-13 | 2017-09-08 | 上海与德科技有限公司 | Array base palte, display module and electronic equipment |
| CN107290084B (en) * | 2017-06-28 | 2019-08-30 | 京东方科技集团股份有限公司 | A kind of pressure sensor and preparation method thereof, electronic device |
| CN108242460A (en) * | 2017-12-22 | 2018-07-03 | 深圳市金立通信设备有限公司 | Fingerprint recognition screen and preparation method thereof |
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