CN108960105B

CN108960105B - Flexible circuit board, terminal equipment and fingerprint identification method

Info

Publication number: CN108960105B
Application number: CN201810663262.4A
Authority: CN
Inventors: 杨乐; 刘磊
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-06-25
Filing date: 2018-06-25
Publication date: 2021-03-26
Anticipated expiration: 2038-06-25
Also published as: CN108960105A

Abstract

The application is suitable for the technical field of fingerprint identification, and provides a flexible circuit board, a terminal device and a fingerprint identification method supporting full-screen fingerprint identification, wherein the flexible circuit board comprises: the base plate, be located be array distribution's fingerprint identification unit on the base plate, the fingerprint identification unit includes: photosensitive diode, photosensitive diode's on the base plate projection position is located the middle zone of the projection position of four adjacent pixel subunits in the display screen, four adjacent pixel subunits are two rows of adjacent two and are listed as, in the photosensitive diode of array distribution, every photosensitive diode all is equipped with the work voltage line, and every row of photosensitive diode all is equipped with the scanning line, and every photosensitive diode all is equipped with the data line, can set up the fingerprint identification function on the display screen through this application to area in order to increase the fingerprint identification module is in order to realize full-screen fingerprint identification function.

Description

Flexible circuit board, terminal equipment and fingerprint identification method

Technical Field

The application belongs to the technical field of fingerprint identification, and particularly relates to a flexible circuit board, a terminal device and a fingerprint identification method supporting full-screen fingerprint identification.

Background

Fingerprinting is a technique of identity authentication by comparing minutiae points of different fingerprints. The fingerprints of each person are different, and the ten fingers of the same person are also obviously different, so that the fingerprints can be used for identity authentication.

At present, more and more mobile terminals are provided with fingerprint identification modules, and the fingerprint identification modules are usually arranged in non-display areas such as a front home key and a back face. However, this arrangement has problems of small recognition area and poor man-machine interaction.

Disclosure of Invention

In view of this, the embodiment of the present application provides a flexible circuit board, a terminal device and a fingerprint identification method, so as to solve the problems of a small identification area and poor human-computer interaction of the existing fingerprint identification module.

A first aspect of an embodiment of the present application provides a flexible circuit board, including:

the fingerprint identification device comprises a substrate and fingerprint identification units which are arranged on the substrate in an array manner;

the fingerprint recognition unit includes: a photodiode;

the projection position of the photosensitive diode on the substrate is positioned in the middle area of the projection positions of four adjacent pixel subunits in the display screen, and the four adjacent pixel subunits are two rows and two columns which are adjacent;

in the photodiodes distributed in an array, each photodiode is provided with a working voltage line, and the working voltage line is used for providing working bias voltage for the photodiodes; each row of photosensitive diodes is provided with a scanning line, and the scanning lines are used for inputting scanning signals; each photosensitive diode is provided with a data line, and the data lines are used for outputting electric signals generated when the photosensitive diodes receive light reflected by fingers in a working state.

A second aspect of an embodiment of the present application provides a terminal device, including:

the flexible circuit board provided by the first aspect of the embodiment of the application.

A third aspect of the embodiments of the present application provides a fingerprint identification method, which is applied to the terminal device provided in the second aspect of the embodiments of the present application, and the fingerprint identification method includes:

after receiving a fingerprint identification instruction, acquiring a window area for fingerprint identification;

the fingerprint identification unit of the window area is started, and the fingerprint identification unit of the area outside the window area on the display screen is closed;

and fingerprint information of the user is collected through the fingerprint identification unit opened in the window area.

A fourth aspect of the embodiments of the present application provides a mobile terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method provided in the third aspect of the embodiments of the present application when executing the computer program.

A fifth aspect of embodiments of the present application provides a computer-readable storage medium storing a computer program which, when executed by one or more processors, performs the steps of the method provided by the third aspect of embodiments of the present application.

A sixth aspect of embodiments of the present application provides a computer program product comprising a computer program which, when executed by one or more processors, performs the steps of the method provided by the third aspect of embodiments of the present application.

The embodiment of the application provides a flexible circuit board, flexible circuit board includes: the fingerprint identification device comprises a substrate and fingerprint identification units which are arranged on the substrate in an array manner; the fingerprint recognition unit includes: a photodiode; the projection position of the photosensitive diode on the substrate is positioned in the middle area of the projection positions of four adjacent pixel subunits in the display screen, and the four adjacent pixel subunits are two rows and two columns which are adjacent; in the photodiodes distributed in an array, each photodiode is provided with a working voltage line, and the working voltage line is used for providing working bias voltage for the photodiodes; each row of photosensitive diodes is provided with a scanning line, and the scanning lines are used for inputting scanning signals; every photosensitive diode all is equipped with the data line, the data line is used for exporting the signal of telecommunication that photosensitive diode produced when operating condition received finger reflection's light, because there is the fingerprint identification unit in the flexible circuit board that this application embodiment set up, just photosensitive diode's projection position is located in the middle zone of the projection position of four adjacent pixel subunits in the display screen at flexible circuit board place, four adjacent pixel subunits are two rows of adjacent, just so, can not influence photosensitive diode and receive finger reflection's light, and, can utilize the display screen at flexible circuit board place provides the pointolite that corresponds with every photosensitive diode to set up the fingerprint identification unit inside the display screen, realized full-screen fingerprint identification function.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a diagram illustrating a wiring manner of a flexible circuit board supporting full-screen fingerprint identification according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a flexible circuit board supporting full-screen fingerprint identification according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of another flexible circuit board supporting full-screen fingerprint identification according to an embodiment of the present application;

fig. 4 is an application scenario of fingerprint identification according to an embodiment of the present application;

fig. 5 is a circuit diagram of a photodiode according to an embodiment of the present disclosure;

FIG. 6 is a circuit diagram of another photodiode according to an embodiment of the present disclosure;

fig. 7 is a schematic flowchart illustrating an implementation process of a fingerprint identification method according to an embodiment of the present application;

FIG. 8 is a schematic flow chart illustrating another implementation of a fingerprint identification method according to an embodiment of the present application;

fig. 9 is a schematic block diagram of a terminal device provided in an embodiment of the present application;

fig. 10 is a schematic block diagram of another terminal device provided in an embodiment of the present application;

in the figure: 1. a substrate; 2. projection of the pixel sub-unit; 3. a photodiode.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Before describing the specific embodiments, an Organic Light-Emitting semiconductor (OLED) display panel is first described. To illustrate the OLED structure, each OLED cell can be made as a hamburger, with the light emitting material being sandwiched between the vegetables. The display cells of each OLED can be controlled to produce three different colors of light. Like LCDs, OLEDs are also classified as active and passive. In the passive mode, the unit selected by the row and column address emits light actively. In the active mode, a Thin Film Transistor (TFT) is disposed behind the OLED unit, and the light emitting unit is driven by the TFT to light up. The active OLED is more power-saving than the passive OLED and has better display performance.

According to the embodiment of the application, the flexible circuit board provided by the embodiment of the application is added in the existing OLED display screen on the basis that the existing OLED is not changed, and full-screen fingerprint identification can be achieved. In application, the flexible circuit board provided by the embodiment of the application can be pasted on the back of the OLED screen.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a flexible circuit board supporting full-screen fingerprint identification according to an embodiment of the present application, as shown in the figure:

the flexible circuit board includes:

the fingerprint identification device comprises a substrate 1 and fingerprint identification units which are arranged on the substrate 1 in an array manner;

the fingerprint recognition unit includes: a photodiode 3;

the projection position of the photosensitive diode 3 on the substrate 1 is located in the middle area of the projection 2 positions of four adjacent pixel subunits in the OLED display screen where the flexible circuit board is located, and the four adjacent pixel subunits are two adjacent rows and two adjacent columns;

in the photodiodes 3 distributed in an array, each photodiode 3 is provided with a working voltage line, and the working voltage line is used for providing working bias voltage for the photodiode 3; each row of the photosensitive diodes 3 is provided with a scanning line, and the scanning lines are used for inputting scanning signals; each photodiode 3 is provided with a data line for outputting an electrical signal generated when the photodiode 3 receives light reflected by a finger in a working state.

In the embodiment of the present application, the flexible circuit board shown in fig. 1 does not display the projection 2 of the pixel subunit in the display screen where the flexible circuit board is located; the flexible circuit board shown in fig. 2 shows a projection 2 of a pixel subunit in a display screen where the flexible circuit board is located, and the flexible circuit board is a flexible circuit board additionally added on the basis of the existing OLED display screen; the substrate 1 may be a flexible substrate. As shown in fig. 2, in the flexible circuit board, 4 pixels shown by a dashed box are located in the projections 2 of two adjacent rows and two adjacent columns of pixel sub-units, and the photodiode 3 is located in the gap portion between the projections 2 of the 4 pixel sub-units. Namely, in the flexible circuit board, a photosensitive diode 3 is arranged in the gap part between the projections 2 of any 4 pixel sub-units in two adjacent rows and two adjacent columns. However, in practice, the proportion of the photodiode 3 may also be smaller than the proportion of the photodiode 3 as shown in fig. 2. That is, there is a case where there is no photodiode 3 in the projection 2 of 4 pixel sub-units located in two adjacent rows and two adjacent columns. The setting can be carried out according to the actual application condition.

Fig. 1 shows only the wiring pattern of the data lines of the photodiodes 3 in the last column, and the wiring pattern of the data lines of the photodiodes 3 in other columns may refer to the wiring pattern of the data lines of the photodiodes 3 in the last column.

Each photosensitive diode 3 is further provided with a working voltage line, and the working voltage line is used for providing working bias voltage for the photosensitive diode 3; the working voltage line is not shown in fig. 1.

Can see through the wiring mode of this application embodiment, can be through data line, scanning line, the operating voltage line control every photodiode's operating condition, for example, if can normally work if will control arbitrary one photodiode, as long as control the row scanning line that photodiode place the data line and the operating voltage line of photodiode open simultaneously can. Certainly, the photodiode not only needs to work normally for fingerprint identification, but also needs a point light source, and the point light source is white light emitted by the combination of the red pixel subunit, the blue pixel subunit and the green pixel subunit in each pixel unit. In practical application, the OLED screen can control light emission and non-light emission to control the photodiode to receive reflected light or cannot receive reflected light to control the data line corresponding to the photodiode to output fingerprint information, which is not limited herein. Therefore, when fingerprint identification is performed, the pixel units adjacent to the photodiode are required to emit white light, so that the photodiode can receive light reflected by a finger, and the photodiode is required to work normally.

It should be noted that, the scanning lines, the data lines, and the working voltage lines may be arranged in a manner of crossing in the middle, but do not represent being connected together, and each row of scanning lines as an independent line does not have cross connection with the scanning lines of other rows, nor does it have cross connection with the data lines and the working voltage lines; similarly, each data line is used as an independent line, and is not in cross connection with other data lines, or is not in cross connection with the scanning line and the working voltage line; the working voltage lines can be led out independently, or can be led out independently in each row or each column, or all the working voltage lines can be connected together, but the working voltage lines are not in cross connection with the scanning lines and the data lines.

Furthermore, the area of the flexible circuit board except the photosensitive diode is a light shielding area;

black shading glue or shading foam is distributed in the shading area.

In this application embodiment, flexible circuit board can regard as a shading bottom plate, photodiode will avoid photodiode received light intensity to receive the influence of the light of leaking into when carrying out fingerprint identification.

Further, the substrate comprises at least two layers of film materials. The wiring of the photodiode shown in fig. 1 is disposed between two layers of film materials.

The wiring of the circuit in which the photodiode is located is arranged between the films, and the part of the photodiode receiving light leaks out from between the films. Thus, the flexible circuit board looks like a substrate distributed with photodiodes, as shown in fig. 3, the circle represents a photodiode 3, the area outside the circle is a light-shielding area, and the circuits where the photodiodes 3 are located are uniformly distributed between two layers of films. Only the photodiodes 3 can be seen distributed on the flexible circuit board.

Further, referring to fig. 4, fig. 4 is a diagram of an application scenario of fingerprint identification according to an embodiment of the present application. In the OLED display screen, the pixel units formed by the red pixel sub-units, the green pixel sub-units and the blue pixel sub-units can be controlled to emit white light with proper intensity by controlling the switch units corresponding to the red pixel sub-units, the green pixel sub-units and the blue pixel sub-units. When a user presses a finger on a glass cover plate of a display screen, white light with proper intensity is reflected to the inside of the display screen by the finger after being irradiated on the finger, a photosensitive diode in the display screen receives the reflected light, the strength of the light received by the photosensitive diode is different due to different finger textures, and the photosensitive diode generates electric signals related to the strength of the light according to the light with different strength; fingerprint information can be generated from the electrical signals fed back by the plurality of photodiodes embedded within the display screen.

The fingerprint identification unit provided by the embodiment of the application does not need to be provided with a point light source independently, and the point light source is saved by using the principle that white light emitted by pixel units in an OLED display screen is used as the point light source.

Further, referring to fig. 5, fig. 5 is a circuit connection manner of a photodiode according to an embodiment of the present disclosure;

the fingerprint recognition unit further includes:

a resistance;

the anode of the photosensitive diode is connected with the working voltage line, the cathode of the photosensitive diode is connected with the first end of the resistor, and the second end of the resistor is connected with the scanning line; the cathode of the photosensitive diode is connected with the data line;

the working voltage line and the scanning line input electric signals simultaneously, and bias voltage is generated at two ends of the photosensitive diode; the photosensitive diode is in a reverse working state; when the finger touches the glass cover plate of the display screen, the texture on the finger can reflect light rays with different strengths, the photosensitive diode in a reverse working state generates reverse current related to the strength of the light rays according to the strength of the received reflected light rays, the two ends of the photosensitive diode generate pressure difference signals related to the strength of the light rays, and the pressure difference signals are output through the data line.

It should be noted that fig. 5 is only a connection manner of a circuit in which the photodiode is located according to the embodiment of the present application, and in practical applications, other connection manners may also be used, for example, fig. 6.

Referring to fig. 6, fig. 6 is a circuit connection manner of another photodiode provided in the embodiment of the present application;

the fingerprint recognition unit further includes: a thin film transistor;

the grid electrode of the thin film transistor is connected with the scanning line; the source electrode of the thin film transistor is connected with the data line; the drain electrode of the thin film transistor is connected with the cathode of the photosensitive diode; the positive electrode of the photosensitive diode is connected with the first end of the voltage dividing resistor, and the second end of the voltage dividing resistor is connected with the working voltage line.

Fingerprint identification: the working voltage line keeps connected with working voltage, the scanning line and the data line input signals, the thin film transistor is conducted at the moment, when the photosensitive diode is not illuminated, reverse current is small, when the illuminated light is strong, the reverse current is large, and the size of the reverse current is related to the intensity of the received light.

When a finger touches the glass cover plate of the display screen, the photodiode generates reverse current change according to the intensity of light reflected by the finger texture, so that the voltage at two ends of the voltage-dividing resistor also changes, and the change of the electric signal can be transmitted out through the electric signal at the data line end.

The fingerprint identification unit in the flexible circuit board provided by the embodiment of the application is independently wired, and the control of the pixel unit in the OLED display screen applied to the flexible circuit board is independent control, so that the influence of the control of the pixel unit in the OLED display screen can be avoided.

The embodiment of the application also provides a display screen, which comprises any one of the flexible circuit boards supporting full-screen fingerprint identification provided in the embodiment of the application, and the flexible circuit board provided in the embodiment of the application is one layer of the display screen, and the display screen can further comprise other layers, such as a glass cover plate, a semiconductor light-emitting layer and the like.

The embodiment of the application further provides a terminal device, which comprises any one of the display screens provided by the embodiment of the application, and in practical application, the terminal device can be a mobile phone, a notebook, a tablet computer and the like. And are not intended to be limiting herein.

Fig. 7 is a schematic flow chart of an implementation process of a fingerprint identification method provided in the embodiment of the present application, where the method is applied to a terminal device where each flexible circuit board is located, and as shown in the figure, the method may include the following steps:

step S701, after receiving the instruction of fingerprint identification, acquires a window area for fingerprint identification.

In this embodiment of the application, the instruction for receiving the fingerprint identification may be: the unlocking instruction may be, for example, an unlocking instruction in which the user touches a display screen of the terminal device in a black screen state, or an instruction of fingerprint recognition that is sent by the user through a preset key or a preset button on a touch screen.

After receiving the instruction of fingerprint identification, the method further comprises the following steps:

and generating a window area on a display screen of the terminal equipment, wherein the window area is used for prompting a user that the window area is an area for collecting fingerprint information.

The user presses a finger in the fingerprint identification window so that one surface of the fingerprint is attached to the glass cover plate of the display screen.

As another embodiment of the present application, after generating a window region on a display screen of the terminal device, the method further includes:

and if an adjusting instruction is received, adjusting the window area to the size and/or the position specified in the adjusting instruction.

In the embodiment of the present application, the fingerprint identification window is adjustable, for example, a user clicks any one of the borders of the fingerprint identification window to select one of the borders of the fingerprint identification window, and after the user clicks the border, the user can drag the border to a predetermined position. In the fingerprint identification window, the position of one frame line opposite to the dragged frame line is unchanged, two frame lines adjacent to the dragged frame line stretch along with the movement of the dragged frame line, and 4 frame lines in the stretching process keep forming a closed area.

In practical application, the size of the fingerprint identification window may be changed in other ways, for example, the user clicks the frame line of the fingerprint identification window and drags the frame line outward, the center position of the fingerprint identification window remains unchanged, the size of the fingerprint identification window increases as the finger drags the frame line outward on the display screen, or the user drags the frame line inward on the display screen, the center position of the fingerprint identification window remains unchanged, and the size decreases as the finger drags the frame line inward on the display screen.

When the position of the fingerprint identification window is changed, a user clicks any corner (the fingerprint identification window is a polygon) of the fingerprint identification window, the preset position of the value of the fingerprint identification window is dragged, at the moment, the size of the fingerprint identification window is unchanged, and the position is changed in real time along with dragging. Of course, in practical application, other adjusting manners are also possible, and are not limited herein.

Step S702 is to turn on the fingerprint identification unit in the window area and turn off the fingerprint identification unit in the area other than the window area on the display screen.

The fingerprint identification unit in will window area opens, will on the display screen the fingerprint identification unit in the region outside the window area closes including:

starting a working voltage line, a scanning line and a data line of the fingerprint identification unit of the window area;

and closing the data lines of the fingerprint identification units in the area outside the window area.

In the embodiment of the present application, as shown in fig. 1, the conditions for the normal operation of the photodiode are as follows: the scanning lines, the data lines and the working voltage lines of the photodiodes are all opened, the working voltage lines of the photodiodes are mutually independent and can be arranged in a column-shared mode or in a full-screen shared mode, the working voltage lines of the photodiodes are mutually independent, only the scanning lines are in a shared mode, so that the fingerprint identification units in the window area are controlled to be opened, namely the data lines and the working voltage lines of the photodiodes in the positions corresponding to the fingerprint identification units corresponding to the window area are controlled to be opened, and the scanning lines of the rows covered by the window area are opened at the same time (the fingerprint identification windows cover the fingerprint identification units in the rows, so that the scanning lines corresponding to the fingerprint identification units in the rows are opened); meanwhile, since the working voltage line and the data line are also independent of each photodiode, when the fingerprint identification unit in the region outside the fingerprint identification window is closed, only the data line and/or the working voltage line of the fingerprint identification unit in the region outside the window region need to be closed. Thus, when fingerprint information is generated by the electric signal transmitted through the data line, only the electric signal in the fingerprint identification window area can be received. It is not necessary to generate fingerprint information from the electric signal on the entire screen, thereby improving the process of generating fingerprint information.

It should be noted that, when fingerprint identification is performed, the pixel unit in the window region is set to emit white light through the switch unit, and the white light can be used as a point light source. The photosensitive diode can generate electric signals with different sizes according to the intensity of light reflected by the finger, so that fingerprint information is generated. Of course, the pixel unit corresponding to the region outside the window region may be set to emit white light, or may be set to emit no light, which is not limited herein.

And step S703, collecting the fingerprint information of the user through the fingerprint identification unit opened in the window area.

The fingerprint information of the user is collected through the fingerprint identification unit opened in the window area comprises the following steps:

and if the contact information of the user is detected in the window area, acquiring the fingerprint information of the user through a fingerprint identification unit in the window area.

According to the embodiment of the application, the photosensitive diodes in the window area are controlled to be in a working state, and the pixel units in the window area in the display screen are controlled to emit white light to serve as point light sources; controlling the photosensitive diode outside the window area to be in a non-working state; the fingerprint information is generated only from the electric signal in the fingerprint identification window area, and the original data volume is reduced, and the data volume is the area containing the fingerprint information, so that the fingerprint identification efficiency can be improved.

Fig. 8 is a schematic flow chart of another implementation of a fingerprint identification method provided in the embodiment of the present application, where the method is applied to a terminal device where each flexible circuit board is located, and as shown in the figure, the method may include the following steps:

step S801, after receiving the instruction of fingerprint identification, monitoring the contact information on the display screen of the terminal equipment.

In the embodiment of the application, after the instruction of fingerprint identification is received, the contact information on the display screen of the terminal equipment can be monitored. If the instruction identified by the instruction indicates that the unlocking instruction is in a black screen state, the user touches the display screen of the terminal device, and it can be considered that after or at the same time of receiving the instruction identified by the fingerprint, the contact information on the display screen of the terminal device is also monitored.

Because the fingerprint identification method that provides in this application embodiment needs to send white light as the pointolite through built-in fingerprint identification unit and red pixel subunit, green pixel subunit, blue pixel subunit in the display module group together, can realize the fingerprint identification of this application embodiment, consequently, after receiving fingerprint identification's instruction, still include:

and switching a display screen of the terminal equipment into a fingerprint identification mode, wherein in the fingerprint identification mode, the pixel units (combination of the red pixel subunit, the green pixel subunit and the blue pixel subunit) in the display screen all emit white light.

At this moment, all can carry out fingerprint identification on terminal equipment's the whole display screen, the user can press the finger in the optional position of display screen to the glass apron of display screen is hugged closely to fingerprint one side that makes. When the user presses the finger, touch point information is generated on the touch screen, namely the information of the user touching the display screen. After the contact information on the display screen of the terminal equipment is monitored, the fingerprint identification area can be determined based on the position of the contact information.

Step S802, after the contact information is monitored to appear on the display screen of the terminal equipment, based on the position of the contact information, taking the minimum circumscribed rectangle of the contact information area as a window area; or based on the position of the contact information, amplifying the minimum circumscribed rectangle of the region of the contact information by preset times to obtain a window region.

In this application embodiment, fingerprint information will be generated in the area that user's finger and the glass apron of display screen contacted, and fingerprint information also can not be generated in the area that user's finger and the glass apron of display screen did not contact yet, so, the area of contact information is the area of fingerprint identification, however, because in this application embodiment, the pointolite area that the fingerprint identification unit of whole screen corresponds all can the outgoing light, in order to dwindle the data bulk of the original signal of telecommunication that will obtain, can set up the area of gathering the signal of telecommunication to the rectangle region. The rectangular area needs to include a contact point area, and the minimum bounding rectangle of the contact point information area can be used as a fingerprint identification area. Of course, in practical applications, the minimum circumscribed rectangle of the region of the contact information may be enlarged by a preset multiple based on the position of the contact information, and then the minimum circumscribed rectangle may be used as the fingerprint identification region.

Step S803, the fingerprint identification unit in the window area is turned on, and the fingerprint identification unit in the area outside the window area on the display screen is turned off.

The content of this step is the same as that of step S702, and reference may be made to the description of step S702, which is not described herein again.

And step S804, collecting the fingerprint information of the user through the fingerprint identification unit opened in the window area.

The difference between the embodiments shown in fig. 7 and fig. 8 is that in the embodiment shown in fig. 7, after receiving the instruction of fingerprint identification, a window area is generated, and the user can press a finger in the window area to collect fingerprint information, and the electric signals of the data lines connected with the photosensitive diodes in the window area are collected; in the embodiment shown in fig. 8, after receiving the instruction of fingerprint identification, the user may press a finger at any position on the display screen, so as to acquire fingerprint information, and may generate a window region according to the region where the user presses the finger, and only obtain the electrical signal of the data line connected to the photodiode in the window region.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Fig. 9 is a schematic block diagram of a terminal device according to an embodiment of the present application, and only a portion related to the embodiment of the present application is shown for convenience of description.

The terminal device 9 may be a software unit, a hardware unit or a combination of software and hardware unit built in a mobile phone, a tablet computer, a notebook computer and other terminal devices, and may also be integrated into the mobile phone, the tablet computer, the notebook computer and other terminal devices as an independent pendant.

The terminal device 9 includes:

a window area acquiring module 91, configured to acquire a window area for fingerprint identification after receiving the instruction for fingerprint identification;

a fingerprint identification function starting module 92, configured to start the fingerprint identification unit in the window area, and close the fingerprint identification unit in the area outside the window area on the display screen;

and the acquisition module 93 is used for acquiring the fingerprint information of the user through the fingerprint identification unit opened in the window area.

Optionally, the fingerprint identification function starting module 92 is further configured to:

and closing the data line and/or the working voltage line of the fingerprint identification unit in the area outside the window area.

Optionally, the window area obtaining module 91 is further configured to:

after receiving a fingerprint identification instruction, generating a window area on a display screen of the terminal equipment, wherein the window area is used for prompting a user that the window area is an area for collecting fingerprint information;

correspondingly, the acquisition module 93 is further configured to:

Optionally, the terminal device 9 further includes:

and the adjusting module is used for adjusting the window area to the size and/or the position specified in the adjusting instruction if the adjusting instruction is received after the window area is generated on the display screen of the terminal equipment.

Optionally, the window region obtaining module 91 includes:

the monitoring unit is used for monitoring contact information on a display screen of the terminal equipment;

the window area acquisition unit is used for taking the minimum circumscribed rectangle of the contact information area as a window area based on the position of the contact information after the contact information on the display screen of the terminal equipment is monitored;

or the like, or, alternatively,

and after the contact information appears on the display screen of the terminal equipment, based on the position of the contact information, amplifying the minimum external rectangle in the contact information area by a preset multiple to be used as a window area.

It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is merely used as an example, and in practical applications, the foregoing function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the terminal device is divided into different functional units or modules to perform all or part of the above-described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

Fig. 10 is a schematic block diagram of a terminal device according to another embodiment of the present application. As shown in fig. 10, the terminal device 10 of this embodiment includes: one or more processors 100, a memory 101, and a computer program 102 stored in the memory 101 and executable on the processors 100. The processor 100 executes the computer program 102 to implement the steps in the above-mentioned embodiments of fingerprint identification methods, such as the steps S701 to S703 shown in fig. 7. Alternatively, the processor 100, when executing the computer program 102, implements the functions of the modules/units in the terminal device embodiments, such as the functions of the modules 91 to 93 shown in fig. 9.

Illustratively, the computer program 102 may be partitioned into one or more modules/units that are stored in the memory 101 and executed by the processor 100 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 102 in the terminal device 10. For example, the computer program 102 may be divided into a window area acquisition module, a fingerprint recognition function enabling module, and an acquisition module.

The window area acquisition module is used for acquiring a window area for fingerprint identification after receiving a fingerprint identification instruction;

the fingerprint identification function starting module is used for starting the fingerprint identification unit of the window area and closing the fingerprint identification unit of the area outside the window area on the display screen;

and the acquisition module is used for acquiring the fingerprint information of the user through the fingerprint identification unit opened in the window area.

Other modules or units can refer to the description of the embodiment shown in fig. 9, and are not described again here.

The terminal device includes but is not limited to a processor 100, a memory 101. Those skilled in the art will appreciate that fig. 10 is merely an example of a terminal device 10 and does not constitute a limitation of terminal device 10 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input devices, output devices, network access devices, buses, etc.

The Processor 100 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The storage 101 may be an internal storage unit of the terminal device 10, such as a hard disk or a memory of the terminal device 10. The memory 101 may also be an external storage device of the terminal device 10, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 10. Further, the memory 101 may also include both an internal storage unit and an external storage device of the terminal device 10. The memory 101 is used for storing the computer program and other programs and data required by the terminal device. The memory 101 may also be used to temporarily store data that has been output or is to be output.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed terminal device and method may be implemented in other ways. For example, the above-described terminal device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A flexible circuit board is applied to a display screen, and is a flexible circuit board additionally added on the basis of an OLED display screen, and the flexible circuit board comprises:

the fingerprint recognition unit includes: a photodiode;

the projection position of the photosensitive diode on the substrate is positioned in the middle area of the projection positions of four adjacent pixel subunits in the display screen, and the four adjacent pixel subunits are two rows and two columns which are adjacent; one photosensitive diode is distributed in the middle gap part of the projection positions of any four adjacent pixel subunits in two rows and two columns;

in the photodiodes distributed in an array, each photodiode is provided with a working voltage line, and the working voltage line is used for providing working bias voltage for the photodiodes; each row of photosensitive diodes is provided with a scanning line, and the scanning lines are used for inputting scanning signals; each photosensitive diode is provided with a data line, and the data line is used for outputting an electric signal generated when the photosensitive diode receives light reflected by a finger in a working state; each data line is an independent line, and is not in cross connection with other data lines, or in cross connection with a scanning line and a working voltage line.

2. The flexible circuit board of claim 1, wherein the region of the flexible circuit board other than the photodiode is a light-shielding region;

black shading glue or shading foam is distributed in the shading area.

3. The flexible circuit board of claim 1, wherein the substrate comprises at least two layers of film.

4. A terminal device, comprising:

a flexible circuit board according to any one of claims 1 to 3.

5. A fingerprint identification method applied to the terminal device according to claim 4, the fingerprint identification method comprising:

fingerprint information of a user is collected through a fingerprint identification unit opened in the window area;

generating a window area on a display screen of the terminal equipment, wherein the window area is used for prompting a user that the window area is an area for collecting fingerprint information;

after generating a window area on a display screen of the terminal device, the method further comprises the following steps:

if an adjustment instruction is received, adjusting the window area to the size and/or position specified in the adjustment instruction, including: when a user clicks the frame line of the fingerprint identification window to drag outwards, the center position of the fingerprint identification window is kept unchanged, and the size of the fingerprint identification window is increased along with the outward dragging of a finger on the display screen; or when the user drags inwards on the display screen, the center position of the fingerprint identification window is kept unchanged, and the size of the fingerprint identification window is reduced along with the inward dragging of the finger on the display screen; when a user clicks any corner of the fingerprint identification window and drags the preset position of the value of the fingerprint identification window, the size of the fingerprint identification window is unchanged, and the position is changed in real time along with dragging.

6. The fingerprint recognition method of claim 5, wherein turning on the fingerprint recognition unit of the window area and turning off the fingerprint recognition unit of an area on the display screen outside the window area comprises:

7. The fingerprint recognition method of claim 5, wherein the collecting of the fingerprint information of the user by the fingerprint recognition unit turned on in the window area comprises:

8. The fingerprint recognition method of claim 5, wherein said acquiring the window area for fingerprint recognition comprises:

monitoring contact information on a display screen of the terminal equipment;

after monitoring that contact information appears on a display screen of the terminal equipment, based on the position of the contact information, taking the minimum external rectangle of the contact information area as a window area;

or the like, or, alternatively,

9. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by one or more processors, implements the steps of the method according to any one of claims 5 to 8.