CN107103288A

CN107103288A - A kind of method, device and terminal that fingerprint recognition is carried out using terminal

Info

Publication number: CN107103288A
Application number: CN201710209862.9A
Authority: CN
Inventors: 韩延罡
Original assignee: Nubia Technology Co Ltd
Current assignee: Tianjin Artificial Intelligence General Application System Tianjin Co ltd
Priority date: 2017-03-31
Filing date: 2017-03-31
Publication date: 2017-08-29
Anticipated expiration: 2037-03-31
Also published as: CN107103288B

Abstract

The embodiment of the invention discloses a kind of method, device and terminal that fingerprint recognition is carried out using terminal, terminal includes：At least one transmitter；Launch optical signal in the fingerprint recognition region that transmitter is used for terminal；This method is specifically included：The reflected light signal in fingerprint recognition region is obtained, reflected light signal is the optical signal reflected by fingerprint recognition region after at least one transmitter launches optical signal to fingerprint recognition region；Determine the reflected light signal grade where reflected light signal；According to the reflected light signal grade of determination, the transmission power corresponding at least one transmitter is determined, wherein, the different transmission power of different reflected light signal grade correspondences；The touch area contacted in fingerprint recognition region by user is obtained, controls the transmitter for launching optical signal to touch area according to corresponding transmission power transmitting optical signal, is operated with performing fingerprint recognition.In this way, the transmission power by adjusting transmitter, improves the fingerprint recognition precision of terminal.

Description

Method and device for fingerprint identification by using terminal and terminal

Technical Field

The present invention relates to the field of image processing, and in particular, to a method and an apparatus for fingerprint identification using a terminal, and a terminal.

Background

At present, terminals with fingerprint identification functions are increasingly popularized, and fingerprint identification is mostly used for unlocking, awakening, paying and other operations of the terminals. Among them, most of the fingerprint identification areas of the mobile terminal are set right under the touch panel of the mobile terminal (for example, the front home key position of the mobile phone), in order to expand the functions of fingerprint identification and the convenience of operation, some mobile terminal manufacturers are trying to combine the fingerprint identification areas of the mobile terminal with the touch panel, that is, to embed the fingerprint identification in the screen of the mobile terminal, for example: the technology of "hidden Fingerprint Identification (IFS)" developed by apple technologies, and the technology of "interactive display panel equipped with infrared diodes" developed by apple, all of which are dedicated to unifying a Fingerprint identification area and a touch panel.

In an Interactive Display Panel (Interactive Display With ir diodes), it is mentioned that the current capacitive sensor is replaced by an infrared diode and a sensor, and a Touch ID sensor buried under a Home key is further modified into a Touch pad, thereby laying a foundation for canceling the Home key and realizing a fingerprint identification operation through the Touch pad. However, in the method of performing fingerprint identification operation using the terminal touch panel, as the area of the touch panel (i.e. the fingerprint identification area) increases, the influence factor of the fingerprint identification accuracy increases, for example: when stains exist on the surface of the touch panel, the collection of the fingerprint image is affected by part of the stains, so that the fingerprint identification precision is reduced.

Disclosure of Invention

In order to solve the above technical problems, embodiments of the present invention provide a method, an apparatus, and a terminal for fingerprint identification by using a terminal, so that the fingerprint identification accuracy of the terminal is improved.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

the embodiment of the invention provides a method for fingerprint identification by using a terminal, wherein the terminal comprises the following steps: at least one transmitter; the transmitter is used for transmitting an optical signal to a fingerprint identification area of the terminal; the method comprises the following steps:

acquiring a reflected light signal of a fingerprint identification area, wherein the reflected light signal is a light signal reflected by the fingerprint identification area after the at least one transmitter transmits the light signal to the fingerprint identification area;

determining the level of the reflected light signal where the reflected light signal is;

determining the transmitting power corresponding to the at least one transmitter according to the determined level of the reflected light signal, wherein different levels of the reflected light signal correspond to different transmitting powers;

and acquiring a touch area contacted by a user in the fingerprint identification area, and controlling an emitter for emitting optical signals to the touch area to emit the optical signals according to corresponding emission power so as to execute fingerprint identification operation.

In the above scheme, before determining the level of the reflected light signal at which the reflected light signal is located, the method further includes: and presetting N levels of the reflected light signals according to the light intensity of the reflected light signals, wherein N is an integer greater than 1.

In the above scheme, the method further comprises: the fingerprint identification area is divided into at least one fingerprint identification sub-area in advance, the fingerprint identification sub-area corresponding to each transmitter is arranged, and each transmitter is used for transmitting optical signals to the corresponding fingerprint identification sub-area;

determining the level of the reflected light signal where the reflected light signal is located; determining the transmitting power corresponding to the at least one transmitter according to the determined level of the reflected light signal, including: determining the corresponding level of the reflected light signal according to the reflected light signal of each fingerprint identification sub-area; and determining the transmission power corresponding to at least one transmitter of each fingerprint identification sub-area according to the determined reflected light signal level of each fingerprint identification sub-area.

In the above solution, the controlling the transmitter that transmits the optical signal to the touch area according to the corresponding transmission power includes: determining all fingerprint identification sub-areas occupied by the touch area, and controlling transmitters for transmitting optical signals to all fingerprint identification sub-areas occupied by the touch area to transmit the optical signals according to corresponding transmission power.

In the above scheme, the transmitter is: infrared emitters or visible light emitters.

The embodiment of the invention also provides a device for fingerprint identification by using the terminal, wherein the terminal comprises: at least one transmitter; the transmitter is used for transmitting an optical signal to a fingerprint identification area of the terminal; the device further comprises: the device comprises an acquisition module, a first determination module, a second determination module and a control module; wherein,

the acquisition module is used for acquiring a reflected light signal of a fingerprint identification area, wherein the reflected light signal is a light signal reflected by the fingerprint identification area after the at least one transmitter transmits the light signal to the fingerprint identification area;

the first determining module is used for determining the level of the reflected light signal where the reflected light signal is;

the second determining module is used for determining the transmitting power corresponding to the at least one transmitter according to the determined reflected light signal grade, wherein different reflected light signal grades correspond to different transmitting powers;

and the control module is used for acquiring a touch area contacted by a user in the fingerprint identification area, and controlling an emitter which emits an optical signal to the touch area to emit the optical signal according to corresponding emission power so as to execute fingerprint identification operation.

In the above scheme, the first determining module is further configured to preset N levels of the reflected light signals according to the light intensity of the reflected light signals, where N is an integer greater than 1.

In the above scheme, the apparatus further comprises: setting a module;

the setting module is used for pre-dividing the fingerprint identification area into at least one fingerprint identification sub-area, and setting the fingerprint identification sub-area corresponding to each transmitter, wherein each transmitter is used for transmitting optical signals to the corresponding fingerprint identification sub-area;

correspondingly, the first determining module is specifically configured to determine a level of a corresponding reflected light signal according to the reflected light signal of each fingerprint identification sub-region; the second determining module is specifically configured to determine, according to the determined level of the reflected light signal of each fingerprint identification sub-region, a transmission power corresponding to at least one transmitter of each fingerprint identification sub-region.

In the foregoing scheme, the control module is specifically configured to determine all fingerprint identification sub-areas occupied by the touch area, and control an emitter that emits an optical signal to all fingerprint identification sub-areas occupied by the touch area to emit an optical signal according to corresponding emission power.

The embodiment of the invention also provides a terminal which comprises any fingerprint identification device.

The embodiment of the invention provides a method, a device and a terminal for fingerprint identification by using the terminal, wherein the terminal comprises: at least one transmitter; the transmitter is used for transmitting an optical signal to a fingerprint identification area of the terminal; the method specifically comprises the following steps: acquiring a reflected light signal of a fingerprint identification area, wherein the reflected light signal is a light signal reflected by the fingerprint identification area after the at least one transmitter transmits the light signal to the fingerprint identification area; determining the level of the reflected light signal where the reflected light signal is; determining the transmitting power corresponding to the at least one transmitter according to the determined level of the reflected light signal, wherein different levels of the reflected light signal correspond to different transmitting powers; and acquiring a touch area contacted by a user in the fingerprint identification area, and controlling an emitter for emitting optical signals to the touch area to emit the optical signals according to corresponding emission power so as to execute fingerprint identification operation. Therefore, the transmission power of the transmitter is adjusted, and the fingerprint identification precision of the terminal is improved.

Drawings

Fig. 1 is a schematic diagram of a hardware structure of an alternative mobile terminal for implementing various embodiments of the present invention;

FIG. 2 is a diagram of a wireless communication system for the mobile terminal shown in FIG. 1;

fig. 3 is a front view of a mobile terminal according to a first embodiment of the present invention;

fig. 4 is a rear view of a mobile terminal according to a first embodiment of the present invention;

FIG. 5 is a flowchart illustrating a first embodiment of a method for fingerprint identification using a terminal according to the present invention;

fig. 6 is a schematic diagram of a first structure of a terminal according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a first component of a detector in an embodiment of the invention;

fig. 8 is a second structural diagram of the terminal according to the embodiment of the present invention;

fig. 9 is a first schematic diagram of a terminal performing a fingerprint identification operation according to an embodiment of the present invention;

FIG. 10 is a flowchart illustrating a second embodiment of a method for fingerprint recognition using a terminal according to the present invention;

fig. 11 is a schematic diagram of a third structure of the terminal according to the embodiment of the present invention;

fig. 12 is a flowchart illustrating a third embodiment of a method for fingerprint recognition using a terminal according to the present invention;

FIG. 13 is a schematic diagram of a second component of a detector in accordance with an embodiment of the present invention;

fig. 14 is a second schematic diagram illustrating a fingerprint identification operation performed by the terminal according to the embodiment of the present invention;

fig. 15 is a schematic structural diagram of a fingerprint identification apparatus according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.

The mobile terminal may be implemented in various forms. For example, the terminal described in the embodiments of the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a Personal Digital Assistant (PDA), a PAD computer (PAD), a Portable Multimedia Player (PMP), a navigation device, and the like, and a fixed terminal such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.

Fig. 1 is a schematic diagram of a hardware structure of an optional mobile terminal for implementing various embodiments of the present invention.

The mobile terminal 100 may include a wireless communication unit 110, an audio/video (a/V) input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, an interface unit 170, a controller 180, and a power supply unit 190, etc. Fig. 1 illustrates a mobile terminal having various components, but it is to be understood that not all illustrated components are required to be implemented. More or fewer components may alternatively be implemented. Elements of the mobile terminal will be described in detail below.

The wireless communication unit 110 typically includes one or more components that allow radio communication between the mobile terminal 100 and a wireless communication system or network. For example, the wireless communication unit may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless internet module 113, a short-range communication module 114, and a location information module 115.

The broadcast receiving module 111 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel. The broadcast channel may include a satellite channel and/or a terrestrial channel. The broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast associated information or a server that receives a previously generated broadcast signal and/or broadcast associated information and transmits it to a terminal. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. Also, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. The broadcast associated information may also be provided via a mobile communication network, and in this case, the broadcast associated information may be received by the mobile communication module 112. The broadcast signal may exist in various forms, for example, it may exist in the form of an Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB), an Electronic Service Guide (ESG) of digital video broadcasting-handheld (DVB-H), and the like. The broadcast receiving module 111 may receive a signal broadcast by using various types of broadcasting systems. In particular, the broadcast receiving module 111 may receive digital broadcasting by using a digital broadcasting system such as a data broadcasting system of multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcasting-handheld (DVB-H), forward link media (MediaFLO @), terrestrial digital broadcasting integrated service (ISDB-T), and the like. The broadcast receiving module 111 may be constructed to be suitable for various broadcasting systems that provide broadcast signals as well as the above-mentioned digital broadcasting systems. The broadcast signal and/or broadcast associated information received via the broadcast receiving module 111 may be stored in the memory 160 (or other type of storage medium).

The mobile communication module 112 transmits and/or receives radio signals to and/or from at least one of a base station (e.g., access point, node B, etc.), an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted and/or received according to text and/or multimedia messages.

The wireless internet module 113 supports wireless internet access of the mobile terminal. The module may be internally or externally coupled to the terminal. The wireless internet access technology to which the module relates may include Wireless Local Area Network (WLAN) (Wi-Fi), wireless broadband (Wibro), worldwide interoperability for microwave access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short-range communication module 114 is a module for supporting short-range communication. Some examples of short-range communication technologies include bluetooth (TM), Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), zigbee (TM), and the like.

The location information module 115 is a module for checking or acquiring location information of the mobile terminal. A typical example of the location information module is a Global Positioning System (GPS). According to the current technology, the location information module 115, which is a GPS, calculates distance information and accurate time information from three or more satellites and applies triangulation to the calculated information, thereby accurately calculating three-dimensional current location information according to longitude, latitude, and altitude. Currently, a method for calculating position and time information uses three satellites and corrects an error of the calculated position and time information by using another satellite. In addition, the GPS module 115 can calculate speed information by continuously calculating current position information in real time.

The user input unit 130 may generate key input data according to a command input by a user to control various operations of the mobile terminal. The user input unit 130 allows a user to input various types of information, and may include a keyboard, dome sheet, touch pad (e.g., a touch-sensitive member that detects changes in resistance, pressure, capacitance, etc. due to being touched), scroll wheel, joystick, etc. In particular, when the touch pad is superimposed on the display unit 151 in the form of a layer, a touch screen may be formed.

The sensing unit 140 detects a current state of the mobile terminal 100 (e.g., an open or closed state of the mobile terminal 100), a position of the mobile terminal 100, presence or absence of contact (i.e., touch input) by a user with the mobile terminal 100, an orientation of the mobile terminal 100, acceleration or deceleration movement and direction of the mobile terminal 100, and the like, and generates a command or signal for controlling an operation of the mobile terminal 100. For example, when the mobile terminal 100 is implemented as a slide-type mobile phone, the sensing unit 140 may sense whether the slide-type phone is opened or closed. In addition, the sensing unit 140 can detect whether the power supply unit 190 supplies power or whether the interface unit 170 is coupled with an external device.

The interface unit 170 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The identification module may store various information for authenticating a user using the mobile terminal 100 and may include a User Identity Module (UIM), a Subscriber Identity Module (SIM), a Universal Subscriber Identity Module (USIM), and the like. In addition, a device having an identification module (hereinafter, referred to as an "identification device") may take the form of a smart card, and thus, the identification device may be connected with the mobile terminal 100 via a port or other connection means. The interface unit 170 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal and the external device.

In addition, when the mobile terminal 100 is connected with an external cradle, the interface unit 170 may serve as a path through which power is supplied from the cradle to the mobile terminal 100 or may serve as a path through which various command signals input from the cradle are transmitted to the mobile terminal. Various command signals or power input from the cradle may be used as signals for recognizing whether the mobile terminal is accurately mounted on the cradle. The output unit 150 is configured to provide output signals (e.g., audio signals, video signals, alarm signals, vibration signals, etc.) in a visual, audio, and/or tactile manner. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and the like.

The display unit 151 may display information processed in the mobile terminal 100. For example, when the mobile terminal 100 is in a phone call mode, the display unit 151 may display a User's Interface (UI) or a Graphical User Interface (GUI) related to a call or other communication (e.g., text messaging, multimedia file downloading, etc.). When the mobile terminal 100 is in a video call mode or an image capturing mode, the display unit 151 may display a captured image and/or a received image, a UI or GUI showing a video or an image and related functions, and the like.

Meanwhile, when the display unit 151 and the touch pad are overlapped with each other in the form of a layer to form a touch screen, the display unit 151 may serve as an input device and an output device. The display unit 151 may include at least one of a Liquid Crystal Display (LCD), a thin film transistor LCD (TFT-LCD), an Organic Light Emitting Diode (OLED) display, a flexible display, a three-dimensional (3D) display, and the like. Some of these displays may be configured to be transparent to allow a user to see from the outside, which may be referred to as transparent displays, and a typical transparent display may be, for example, a Transparent Organic Light Emitting Diode (TOLED) display or the like. Depending on the particular desired implementation, the mobile terminal 100 may include two or more display units (or other display devices), for example, the mobile terminal may include an external display unit (not shown) and an internal display unit (not shown). The touch screen may be used to detect a touch input pressure as well as a touch input position and a touch input area.

The audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 into an audio signal and output as sound when the mobile terminal is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output module 152 may provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output module 152 may include a speaker, a buzzer, and the like.

The alarm unit 153 may provide an output to notify the mobile terminal 100 of the occurrence of an event. Typical events may include call reception, message reception, key signal input, touch input, and the like. In addition to audio or video output, the alarm unit 153 may provide output in different ways to notify the occurrence of an event. For example, the alarm unit 153 may provide an output in the form of vibration, and when a call, a message, or some other incoming communication (communicating communication) is received, the alarm unit 153 may provide a tactile output (i.e., vibration) to inform the user thereof. By providing such a tactile output, the user can recognize the occurrence of various events even when the user's mobile phone is in the user's pocket. The alarm unit 153 may also provide an output notifying the occurrence of an event via the display unit 151 or the audio output module 152.

The memory 160 may store software programs or the like for processing and controlling operations performed by the controller 180, or may temporarily store data (e.g., a phonebook, messages, still images, videos, etc.) that has been output or is to be output. Also, the memory 160 may store data regarding various ways of vibration and audio signals output when a touch is applied to the touch screen.

The memory 160 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. Also, the mobile terminal 100 may cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.

The controller 180 generally controls the overall operation of the mobile terminal. For example, the controller 180 performs control and processing related to voice calls, data communications, video calls, and the like. In addition, the controller 180 may include a multimedia module 181 for reproducing (or playing back) multimedia data, and the multimedia module 181 may be constructed within the controller 180 or may be constructed separately from the controller 180. The controller 180 may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image.

The power supply unit 190 receives external power or internal power and provides appropriate power required to operate various elements and components under the control of the controller 180.

The various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or any combination thereof. For a hardware implementation, the embodiments described herein may be implemented using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, an electronic unit designed to perform the functions described herein, and in some cases, such embodiments may be implemented in the controller 180. For a software implementation, the implementation such as a process or a function may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in the memory 160 and executed by the controller 180.

Up to now, the mobile terminal has been described in terms of its functions. Hereinafter, a slide-type mobile terminal among various types of mobile terminals, such as a folder-type, bar-type, swing-type, slide-type mobile terminal, and the like, will be described as an example for the sake of brevity. Accordingly, the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.

The mobile terminal 100 as shown in fig. 1 may be configured to operate with communication systems such as wired and wireless communication systems and satellite-based communication systems that transmit data via frames or packets.

A communication system in which a mobile terminal according to the present invention is operable will now be described with reference to fig. 2.

Such communication systems may use different air interfaces and/or physical layers. For example, the air interface used by the communication system includes, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)), global system for mobile communications (GSM), and the like. By way of non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.

Referring to fig. 2, the CDMA wireless communication system may include a plurality of mobile terminals 100, a plurality of Base Stations (BSs) 270, Base Station Controllers (BSCs) 275, and a Mobile Switching Center (MSC) 280. The MSC280 is configured to interface with a Public Switched Telephone Network (PSTN) 290. The MSC280 is also configured to interface with a BSC275, which may be coupled to the base station 270 via a backhaul. The backhaul may be constructed according to any of several known interfaces including, for example, E1/T1, ATM, IP, PPP, frame Relay, HDSL, ADSL, or xDSL. It will be understood that a system as shown in fig. 2 may include multiple BSCs 275.

Each BS270 may serve one or more sectors (or regions), each sector covered by a multi-directional antenna or an antenna pointing in a particular direction being radially distant from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS270 may be configured to support multiple frequency allocations, with each frequency allocation having a particular frequency spectrum (e.g., 1.25MHz,5MHz, etc.).

The intersection of partitions with frequency allocations may be referred to as a CDMA channel. The BS270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" may be used to generically refer to a single BSC275 and at least one BS 270. The base stations may also be referred to as "cells". Alternatively, each sector of a particular BS270 may be referred to as a plurality of cell sites.

As shown in fig. 2, a Broadcast Transmitter (BT)295 transmits a broadcast signal to the mobile terminal 100 operating within the system. A broadcast receiving module 111 as shown in fig. 1 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295. In fig. 2, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 assists in locating at least one of the plurality of mobile terminals 100.

In fig. 2, a plurality of satellites 300 are depicted, but it is understood that useful positioning information may be obtained with any number of satellites. The GPS module 115 as shown in fig. 1 is generally configured to cooperate with satellites 300 to obtain desired positioning information. Other techniques that can track the location of the mobile terminal may be used instead of or in addition to GPS tracking techniques. In addition, at least one GPS satellite 300 may selectively or additionally process satellite DMB transmission.

As a typical operation of the wireless communication system, the BS270 receives reverse link signals from various mobile terminals 100. The mobile terminal 100 is generally engaged in conversations, messaging, and other types of communications. Each reverse link signal received by a particular base station 270 is processed within the particular BS 270. The obtained data is forwarded to the associated BSC 275. The BSC provides call resource allocation and mobility management functions including coordination of soft handoff procedures between BSs 270. The BSCs 275 also route the received data to the MSC280, which provides additional routing services for interfacing with the PSTN 290. Similarly, the PSTN290 interfaces with the MSC280, the MSC interfaces with the BSCs 275, and the BSCs 275 accordingly control the BS270 to transmit forward link signals to the mobile terminal 100.

Based on the above mobile terminal hardware structure and communication system, various embodiments of the present invention are proposed.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

First embodiment

A first embodiment of the present invention provides a method for performing fingerprint identification by using a terminal, which can be applied to a terminal having a fingerprint identification function.

Here, the terminal described above may be a fixed terminal having a display screen, or may be a mobile terminal having a display screen.

The above-mentioned fixed terminal may be a computer, and the above-mentioned mobile terminal includes but is not limited to a mobile phone, a notebook computer, a camera, a PDA, a PAD, a PMP, a navigation device, and the like. The terminal can be connected to the internet, wherein the connection mode can be through a mobile internet network provided by an operator, and can also be through accessing a wireless access point to perform network connection.

Here, if the mobile terminal has an operating system, the operating system may be UNIX, Linux, Windows, Android (Android), Windows Phone, or the like.

The type, shape, size, and the like of the display screen on the terminal are not limited, and the display screen on the terminal may be a liquid crystal display screen, for example.

In the first embodiment of the present invention, the display screen described above is used to provide a human-computer interaction interface for a user, and the display screen can be used as a fingerprint identification area to perform a fingerprint identification operation. When the mobile terminal described above is a mobile phone, fig. 3 is a front view of the mobile terminal according to the first embodiment of the present invention, and fig. 4 is a rear view of the mobile terminal according to the first embodiment of the present invention.

When the terminal touch panel is used for fingerprint identification, different operations can be executed by identifying different fingers, for example, an application program can be started by pressing the screen with the forefinger, and a message application can be started by simultaneously pressing the little finger and the thumb, and the like.

If a user worrys that the whole touch panel supports the fingerprint identification technology to bring about serious consumption of the electric quantity of the mobile phone, the fingerprint identification operation of the user on the terminal can be identified through enhanced sensitivity (enhanced sensitivity) and the daily control operation of the user on the terminal can be identified through reduced sensitivity (reduced sensitivity) according to the difference between the fingerprint identification and the daily use of the whole touch panel.

Fig. 5 is a flowchart of a first embodiment of the method for fingerprint identification using a terminal according to the present invention, and as shown in fig. 5, the method includes steps 500 to 503.

Step 500: acquiring a reflected light signal of a fingerprint identification area, wherein the reflected light signal is a light signal reflected by the fingerprint identification area after the at least one emitter emits a light signal to the fingerprint identification area.

In the embodiment of the invention, the terminal comprises: at least one transmitter for transmitting an optical signal to a fingerprint identification area of the terminal. The terminal can be mobile terminals such as smart phones, tablet computers, notebook computers, Point of Sale (POS), and the fingerprint identification area can be a terminal touch panel, for example: a touch screen of the smart phone, a fingerprint acquisition area of the POS machine and the like.

The emitter may be: infrared emitters or visible light emitters.

Optionally, the optical signal may be: the intensity of infrared or visible light. Accordingly, the Infrared emitter may be an Infrared Light Emitting Diode (Infrared LED), and the visible Light emitter may be a Light Emitting Diode (Light Emitting Diode). It is understood that an infrared light emitting diode is a diode that emits infrared light, and that LEDs emit visible light of different wavelengths depending on the materials used.

In actual implementation, a receiver associated with the transmitter may be used to acquire a reflected light signal of the fingerprint identification area; for example, the receiver is an infrared receiver when the emitter is an infrared light emitting diode, and a photodiode when the emitter is an LED that emits visible light.

Fig. 6 is a schematic diagram of a first structure of a terminal in an embodiment of the present invention, and as shown in fig. 6, the terminal includes: a fingerprint identification area 30 and a detector 31. The fingerprint identification area 30 may be a touch panel on the terminal, the detectors 31 are uniformly distributed below the fingerprint identification area 30 and may each operate individually, and the detectors 31 at least include an emitter for emitting a light signal and a receiver for receiving a light signal.

Fig. 7 is a schematic diagram of a first component structure of a detector in an embodiment of the present invention, and as shown in fig. 7, the detector 31 may include: a controller 311, a transmitter 312, and a receiver 313; the controller 311 is configured to receive a signal uploaded by the transmitter 312 or the receiver 313, process the signal, and send a related control signal to the transmitter 312 or the receiver 313; the transmitter 312 is used to transmit an optical signal to the fingerprint identification area; the receiver 313 is used to receive the light signal reflected by the fingerprint identification area.

In practical implementation, after each transmitter of the terminal transmits a light signal to the fingerprint identification area of the terminal, a part of light passes through the fingerprint identification area and is transmitted to the outside of the terminal, another part of light is reflected back to the inside of the terminal through the fingerprint identification area, at this time, a receiver configured in the inside of the terminal receives the reflected light signal, and the terminal acquires the reflected light received by the receiver. In practical applications, the tidiness of the fingerprint identification area can be judged by the received reflected light. Here, when there is the spot on the touch panel surface, some spot can reflect the light signal that the transmitter sent back, hinders that the light signal passes through the fingerprint identification area and arrives and be used for the fingerprint surface, and like this, when the user is carrying out fingerprint identification, just enough light signal arrival user's fingerprint surface just can not be carried out to the user, and the light signal that the fingerprint surface can reflect reduces, thereby can't gather sufficient fingerprint image, reduces fingerprint identification precision.

Step 501: determining a reflected light signal level at which the reflected light signal is located.

In practical implementation, N levels of the reflected light signals are preset according to the light intensity of the reflected light signals, wherein N is an integer greater than 1. It should be noted that a plurality of reflected light signals may correspond to a reflected light signal level.

Step 502: and determining the transmitting power corresponding to the at least one transmitter according to the determined level of the reflected optical signal, wherein different levels of the reflected optical signal correspond to different transmitting powers.

The embodiment of the invention can also comprise: when the fingerprint identification area of the terminal does not detect that the user performs the contact operation, each emitter is controlled to emit a light signal to the fingerprint identification area, and the emission power of each emitter is adjusted according to the obtained reflected light signal.

Illustratively, the terminal determines the tidiness of the fingerprint identification area according to the obtained reflected light signal. When more reflected light signals are obtained, the neatness degree of the fingerprint identification area is lower, further, the more stains are found in the fingerprint identification area, more light signals emitted to the fingerprint identification area are reflected back to the inside of the terminal, the light signals passing through the fingerprint identification area are reduced, and in order to improve the accuracy of fingerprint identification, the generation power of an emitter is increased, more light signals pass through the fingerprint identification area to reach the surface of a fingerprint, so that enough fingerprint images are collected, and the fingerprint identification precision is improved; when the neatness degree is higher, it is indicated that stains in the fingerprint identification area are less, and the number of optical signals passing through the fingerprint identification area is more at this time, the optical signal reaching the fingerprint surface exceeds the optical signal threshold value capable of ensuring the fingerprint identification precision, so that the emission power of the emitter can be reduced in consideration of saving the energy consumption of the terminal, and the optical signal reaching the fingerprint surface is reduced.

The embodiment of the invention can also comprise: the fingerprint identification area is divided into at least one fingerprint identification sub-area in advance, the fingerprint identification sub-area corresponding to each transmitter is arranged, and each transmitter is used for transmitting optical signals to the corresponding fingerprint identification sub-area.

Correspondingly, according to the reflected light signal of each fingerprint identification sub-area, determining the corresponding reflected light signal level; and determining the transmission power corresponding to at least one transmitter of each fingerprint identification sub-area according to the determined reflected light signal level of each fingerprint identification sub-area.

Fig. 8 is a schematic diagram of a second structure of the terminal in the embodiment of the present invention, and as shown in fig. 8, the terminal includes: a fingerprint identification area 30 and detectors 31, each detector 31 being individually controllable by the terminal. The fingerprint identification area 30 is uniformly divided into 9 fingerprint identification sub-areas, and all the detectors are also uniformly divided into 9 groups, each group of detectors corresponds to one fingerprint identification sub-area, the transmitter in each group of detectors respectively transmits light signals to the fingerprint identification sub-area corresponding to the transmitter, and the receiver in each group of detectors respectively receives the reflected light signals of the fingerprint identification sub-area corresponding to the receiver. The transmission power of each set of transmitters may be adjusted based on the reflected light signals of the respective corresponding sub-regions of the fingerprint identification received by the receivers in each set of detectors. Therefore, when the sub-regional clean and tidy degree of fingerprint identification is inequality, can set up the transmitting power who is fit for the transmitter of each fingerprint identification operation to improve the fingerprint identification degree of accuracy, reduce terminal power consumption.

Step 503: acquiring a touch area contacted by a user in the fingerprint identification area, and controlling an emitter for emitting optical signals to the touch area to emit the optical signals according to corresponding emission power so as to execute fingerprint identification operation.

Optionally, when the fingerprint identification area is contacted by a user, only the transmitter which transmits the optical signal to the touch area or a certain range around the touch area is controlled to work, and the transmitter which transmits the optical signal to other areas does not work, so that the working efficiency of the transmitter is improved, and the energy consumption of the terminal is reduced.

In practical implementation, after the fingerprint identification area is divided into a plurality of fingerprint identification sub-areas in advance, when the fingerprint identification area is contacted by a user, all the fingerprint identification sub-areas occupied by the touch area are determined, and the transmitters of all the determined fingerprint identification sub-areas are controlled to transmit optical signals to the touch area.

Fig. 9 is a first schematic diagram illustrating a fingerprint identification operation performed by the terminal according to the embodiment of the present invention, as shown in fig. 9, when the fingerprint identification area 30 is touched by a user, a touch area (shown by a shaded portion in the figure) is formed in the fingerprint identification area, and the fingerprint identification sub-areas occupied by the currently touched area include fingerprint identification sub-areas 5 and 8. After determining the fingerprint identification sub-area occupied by the touch area, activating the emitters in the detector groups 5 and 8 corresponding to the fingerprint identification sub-areas 5 and 8 to emit optical signals to the fingerprint identification sub-areas 5 and 8, and the other detector groups do not work; the receivers in the detector groups 5 and 8 receive the light signals reflected by the fingerprint identification sub-regions 5 and 8, identify the currently acquired fingerprint image according to the received reflected light signals, and perform corresponding operations.

Second embodiment

Fig. 10 is a flowchart of a second embodiment of the method for fingerprint identification by a terminal according to the present invention, as shown in fig. 10, the flowchart includes:

step 1000: n reflected light signal grades are preset, the reflected light signal grades correspond to the transmitting power of the transmitter one by one, and N is an integer larger than 1.

It can be understood that if each reflected light signal corresponds to the emission power of different emitters, the emission power of the emitters can be set more accurately, and the control precision of the emitters is improved. However, the setting mode increases the processing process of the terminal and reduces the operation efficiency of the terminal.

It is understood that when the transmission power is adjusted according to the light intensity of the reflected light signal, since the obtained light intensity of the reflected light signal may fluctuate frequently within a small range, it is not necessary to set the transmission power of the corresponding transmitter for each reflected light signal. Therefore, N corresponding transmission powers can be set for the N levels of the reflected optical signals after the N levels of the reflected optical signals are set in advance. Therefore, after the reflected light signal is obtained, the corresponding reflected light signal grade is determined, and then the transmitting power of the transmitter is determined, so that the processing process of the terminal can be reduced, and the setting efficiency of the transmitting power of the transmitter is improved.

The N levels of the reflected optical signals may be set by a developer during the terminal design process by default according to experimental results, and may not be user modifiable or may be user modifiable.

Step 1001: dividing a fingerprint identification area into M fingerprint identification sub-areas, and dividing a detector into M detector groups; m is a positive integer.

Specifically, the fingerprint identification area may be uniformly divided into M identical sub-areas, or the fingerprint identification area may be divided into M different sub-areas according to the habit of the user performing the fingerprint identification operation. It can be understood that the area which is frequently contacted by the user during the fingerprint identification operation is divided into the sub-areas with smaller areas, and the area which is not frequently operated is divided into the sub-areas with larger areas, so that the transmitting power of the transmitter can be more accurately adjusted for the area which is frequently operated by the user, and the fingerprint identification precision is improved.

It should be noted that the sequence between step 1000 and step 1001 is not limited by the embodiment of the present invention.

Step 1002: and acquiring a reflected light signal of each fingerprint identification subarea.

In practical implementation, a transparent protective film may cover the surface of the fingerprint identification area of a terminal (such as a mobile phone), the plane of a reflected light signal is increased due to the addition of the protective film, and the light signal reflected by the fingerprint identification area is also increased.

Step 1003: and determining the corresponding level of the reflected light signal according to the reflected light signal of each fingerprint identification sub-area.

Step 1004: and determining the transmitting power of the corresponding transmitter according to the level of the reflected light signal of each fingerprint identification sub-area.

Step 1005: and adjusting the transmitting power of the transmitter corresponding to each fingerprint identification subregion according to the determined transmitting power.

In the embodiment of the invention, under the screen locking state of the terminal or when a user does not operate the terminal, the neatness degree of the fingerprint identification area is detected according to the obtained reflected light signal of the fingerprint identification area, so as to adjust the transmitting power of the transmitter.

Fig. 11 is a schematic diagram of a third structure of the terminal according to the embodiment of the present invention, in which the transmitter is an infrared light emitting diode and the receiver is an infrared receiver. As shown in fig. 11, the terminal includes: a fingerprint identification area 30 and a plurality of detectors 31, the detectors 31 comprising: a controller 311, an infrared light emitting diode 312a, and an infrared receiver 313 a. The adjustment process of the emission power may specifically be that the controller 311 in the detector 31 controls the respective infrared light emitting diodes 312a to start, and emits infrared rays to the various corresponding fingerprint identification sub-regions, a part of the infrared rays are reflected back to the inside of the terminal through the fingerprint identification region and received by the infrared receiver 313a, the infrared receiver 313a sends the received reflected light signal to the controller 311, and the controller 311 resets the emission power of the infrared light emitting diodes 312a after determining the emission power of the infrared light emitting diodes 312a according to the obtained reflected light signal.

Step 1006: when the fingerprint identification area is contacted by a user, the adjusted transmitting power of the transmitter is utilized to transmit optical signals to the touch area, and fingerprint identification operation is executed.

Third embodiment

To further illustrate the object of the present invention, the first embodiment of the present invention is further exemplified.

Fig. 12 is a flowchart of a third embodiment of the method for fingerprint identification by a terminal according to the present invention, as shown in fig. 12, the flowchart includes:

step 1200: the transmit power of the transmitter is adjusted.

Here, the method of adjusting the transmission power of the transmitter may refer to the second embodiment of the present invention.

Step 1201: the terminal senses that the fingerprint identification area is touched by the user.

Step 1202: judging whether the area of the current touch area is larger than or equal to the minimum fingerprint identification area or not, and if so, executing a step 1203; if not, return to step 1200.

In this embodiment of the present invention, the detector of the terminal may further include: and the sensor is used for detecting whether the user contacts the fingerprint identification area. Fig. 13 is a schematic diagram of a second component structure of the detector in the embodiment of the present invention, and as shown in fig. 13, the detector 31 may include: the controller 311, the transmitter 312, the receiver 313 and the sensor 314, when the sensor 314 detects that the user touches the fingerprint identification area, the sensor 314 sends a prompt signal and the detected area of the touch area to the controller 311, the controller 311 judges whether the area of the touch area is larger than or equal to the minimum fingerprint identification area, and if so, fingerprint identification operation is performed on the touch area; if not, the current operation may be a faulty operation or other non-fingerprint identification operation, and the process returns to step 1200 to continue waiting for a fingerprint identification operation that satisfies the condition.

Here, the minimum fingerprint identification area is a minimum fingerprint image area that can be identified by the terminal when performing a fingerprint identification operation, the minimum fingerprint identification area may be a minimum value of a contact area with the fingerprint identification area when the user inputs fingerprint identification data, and the minimum fingerprint identification area may be adaptively modified according to operation habits of different users. For example, the terminal may obtain enough fingerprint information when the area of the fingerprint image collected by the terminal is at least 9 square centimeters, so as to further identify the current fingerprint image.

Step 1203: and determining the fingerprint identification sub-area occupied by the current touch area.

Illustratively, the fingerprint identification sub-areas occupied by the current touch area include the fingerprint identification sub-areas 5 and 8 in fig. 9.

Step 1204: and starting a transmitter in the fingerprint identification subarea to transmit a light signal to the touch area.

It should be noted that when it is determined that the touch area occupies the fingerprint identification sub-areas 5 and 8, the emitters of the detector groups 5 and 8 are activated to emit light signals to the fingerprint identification sub-areas 5 and 8, and the higher the coincidence of the determined fingerprint identification sub-area with the current touch area, the higher the operating efficiency of the emitters is, and conversely, the lower the operating efficiency of the emitters is, because the emitters in operation need to emit light signals not only to the touch area but also to the area around the touch area. The smaller the area of the visible fingerprint identification sub-area, the more efficient the transmitter works and thus saves more power, but the higher the processing and control functions requirements of the terminal are.

Step 1205: the receiver receives the optical signal reflected by the touch area.

Step 1206: and identifying the currently obtained fingerprint image according to the obtained reflected light signal, and executing corresponding operation.

Fig. 14 is a second schematic diagram illustrating the fingerprint recognition operation performed by the terminal according to the embodiment of the present invention, as shown in fig. 14, when the sensor 314 detects that the fingerprint recognition area 30 is touched by the user, a prompt signal is sent to the controller 311, and after the controller 311 determines the fingerprint recognition sub-area occupied by the touch area, the transmitter corresponding to the fingerprint recognition sub-area is activated to transmit a light signal to the touch area; the receiver 313 receives the optical signal reflected by the touch area, and then sends the received reflected optical signal to the controller, the terminal matches the acquired fingerprint image with a pre-stored fingerprint image sample, if matching, the current fingerprint operation is determined to be successful, and corresponding operation is executed; and if not, determining that the current fingerprint operation is a non-specified user operation or an error operation.

In the embodiment of the present invention, a terminal includes: at least one transmitter; the transmitter is used for transmitting an optical signal to a fingerprint identification area of the terminal; the method comprises the following steps: acquiring a reflected light signal of a fingerprint identification area, wherein the reflected light signal is a light signal reflected by the fingerprint identification area after a transmitter transmits the light signal to the fingerprint identification area; adjusting the transmitting power of a transmitter for transmitting optical signals to the fingerprint identification area according to the reflected optical signals; controlling an emitter emitting a light signal to a touch area when the fingerprint identification area is contacted by a user; and acquiring the optical signal formed by the reflection of the touch area, and executing fingerprint identification operation according to the optical signal formed by the reflection of the touch area. Therefore, the fingerprint identification precision of the terminal is improved.

Fourth embodiment

Aiming at the method of the embodiment of the invention, the embodiment of the invention also provides a fingerprint identification device.

Fig. 15 is a schematic diagram of a structure of a fingerprint recognition apparatus according to an embodiment of the present invention, and as shown in fig. 15, the apparatus includes: the device comprises: at least one transmitter; the transmitter is used for transmitting an optical signal to a fingerprint identification area of the terminal; the device further comprises: an acquisition module 1500, a first determination module 1501, a second determination module 1502, and a control module 1503; wherein,

an acquiring module 1500, configured to acquire a reflected light signal of a fingerprint identification area, where the reflected light signal is a light signal reflected by the fingerprint identification area after the at least one transmitter transmits the light signal to the fingerprint identification area;

a first determining module 1501, configured to determine a level of a reflected light signal where the reflected light signal is located;

a second determining module 1502, configured to determine, according to the determined level of the reflected light signal, an emission power corresponding to the at least one emitter, where different levels of the reflected light signal correspond to different emission powers;

the control module 1503 is configured to acquire a touch area touched by a user in the fingerprint identification area, and control an emitter that emits an optical signal to the touch area to emit the optical signal according to a corresponding emission power, so as to perform a fingerprint identification operation.

Illustratively, the first determining module 1501 may be further configured to preset N levels of the reflected light signal according to the light intensity of the reflected light signal, where N is an integer greater than 1.

Illustratively, the apparatus may further comprise: setting a module; the setting module is used for dividing the fingerprint identification area into at least one fingerprint identification sub-area in advance, setting the fingerprint identification sub-area corresponding to each transmitter, and each transmitter is used for transmitting optical signals to the corresponding fingerprint identification sub-area;

correspondingly, the first determining module 1501 is specifically configured to determine, according to the reflected light signal of each fingerprint identification sub-region, a corresponding reflected light signal level; the second determining module 1502 is specifically configured to determine, according to the determined level of the reflected light signal of each fingerprint identification sub-area, a transmission power corresponding to at least one transmitter of each fingerprint identification sub-area.

Illustratively, the control module 1503 is specifically configured to determine all fingerprint identification sub-areas occupied by the touch area, and control the transmitter that transmits the optical signal to all fingerprint identification sub-areas occupied by the touch area to transmit the optical signal according to the corresponding transmission power.

In practical applications, the emitter may be an infrared light emitting diode or an LED emitting visible light; the obtaining module 1500, the first determining module 1501, the second determining module 1502, the control module 1503, and the setting module may be implemented by a Central Processing Unit (CPU), a microprocessor Unit (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like in the terminal.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method for fingerprint identification by using a terminal, the terminal comprising: at least one transmitter; the transmitter is used for transmitting an optical signal to a fingerprint identification area of the terminal; the method comprises the following steps:

2. The method of claim 1, wherein prior to determining the reflected light signal level at which the reflected light signal is located, the method further comprises: and presetting N levels of the reflected light signals according to the light intensity of the reflected light signals, wherein N is an integer greater than 1.

3. The method of claim 1, further comprising: the fingerprint identification area is divided into at least one fingerprint identification sub-area in advance, the fingerprint identification sub-area corresponding to each transmitter is arranged, and each transmitter is used for transmitting optical signals to the corresponding fingerprint identification sub-area;

the determining the level of the reflected light signal at which the reflected light signal is located comprises: determining the corresponding level of the reflected light signal according to the reflected light signal of each fingerprint identification sub-area;

the determining the transmission power corresponding to the at least one transmitter according to the determined level of the reflected light signal includes: and determining the transmission power corresponding to at least one transmitter of each fingerprint identification sub-area according to the determined reflected light signal level of each fingerprint identification sub-area.

4. The method of claim 3, wherein controlling the emitters that emit light signals to the touch area to emit light signals according to corresponding emission powers comprises: determining all fingerprint identification sub-areas occupied by the touch area, and controlling transmitters for transmitting optical signals to all fingerprint identification sub-areas occupied by the touch area to transmit the optical signals according to corresponding transmission power.

5. The method of claim 1, wherein the transmitter is: infrared emitters or visible light emitters.

6. An apparatus for fingerprint recognition using a terminal, the terminal comprising: at least one transmitter; the transmitter is used for transmitting an optical signal to a fingerprint identification area of the terminal; the device further comprises: the device comprises an acquisition module, a first determination module, a second determination module and a control module; wherein,

7. The apparatus of claim 6, wherein the first determining module is further configured to preset N levels of the reflected light signal according to the light intensity of the reflected light signal, where N is an integer greater than 1.

8. The apparatus of claim 6, further comprising: setting a module;

9. The device according to claim 8, wherein the control module is configured to determine all fingerprint recognition sub-areas occupied by the touch area, and to control the transmitter that transmits the optical signal to all fingerprint recognition sub-areas occupied by the touch area to transmit the optical signal according to the corresponding transmission power.

10. A terminal, characterized in that it comprises the apparatus of any of claims 6 to 9.