CN109376569B - Display screen, electronic equipment and fingerprint identification method - Google Patents

Display screen, electronic equipment and fingerprint identification method Download PDF

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Publication number
CN109376569B
CN109376569B CN201710650785.0A CN201710650785A CN109376569B CN 109376569 B CN109376569 B CN 109376569B CN 201710650785 A CN201710650785 A CN 201710650785A CN 109376569 B CN109376569 B CN 109376569B
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control
photosensitive sensor
signal
finger
touch area
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CN109376569A (en
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张君勇
朱家庆
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201710650785.0A priority Critical patent/CN109376569B/en
Priority to PCT/CN2018/086330 priority patent/WO2019024561A1/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Image Input (AREA)
  • User Interface Of Digital Computer (AREA)
  • Telephone Function (AREA)
  • Collating Specific Patterns (AREA)

Abstract

The application provides a display screen, an electronic device and a fingerprint identification method, which comprises the following steps: the AMOLED display panel comprises a photosensitive sensor, a control Integrated Circuit (IC), an active matrix organic light-emitting diode (AMOLED) panel, a polaroid and cover plate glass, wherein the polaroid is arranged between the AMOLED panel and the cover plate glass, and the control IC is connected with the photosensitive sensor; the photosensitive sensor is laid on the surface of the AMOLED panel and arranged between the AMOLED panel and the polaroid; the photosensitive sensor is used for converting optical signals reflected by the fingers of the user into electric signals when the fingers of the user touch the cover plate glass; the photosensitive sensor is also used for sending the electric signal to the control IC; the control IC is used for converting the electric signal into a fingerprint signal and carrying out fingerprint identification according to the fingerprint signal, and the screen occupation ratio of the electronic equipment is improved while the fingerprint identification is realized.

Description

Display screen, electronic equipment and fingerprint identification method
Technical Field
The application relates to the technical field of electronic equipment, in particular to a display screen, electronic equipment and a fingerprint identification method.
Background
With the continuous development of science and technology, in order to facilitate unlocking, safe payment and the like, a fingerprint identification technology has become a vital part in the life of people as an important function of electronic equipment.
Use electronic equipment as the cell-phone for the example, present most cell-phones are all through the mode with fingerprint module leading, and assemble the fingerprint module in the chin district of cell-phone, gather user's fingerprint signal through the fingerprint module in chin district to accomplish fingerprint identification.
However, the chin area occupies a certain area, which affects the display ratio of the display screen, so that the screen ratio of the mobile phone is not high.
Disclosure of Invention
The application provides a display screen, electronic equipment and a fingerprint identification method, which improve the screen occupation ratio of the electronic equipment while realizing fingerprint identification.
In a first aspect, the present application provides a display screen applied to an electronic device, where the display screen may include:
the AMOLED display panel comprises a photosensitive sensor, a control Integrated Circuit (IC), an active matrix organic light-emitting diode (AMOLED) panel, a polaroid and cover plate glass, wherein the polaroid is arranged between the AMOLED panel and the cover plate glass, and the control IC is connected with the photosensitive sensor;
the photosensitive sensor is laid on the surface of the AMOLED panel and arranged between the AMOLED panel and the polaroid;
the photosensitive sensor is used for converting optical signals reflected by the fingers of the user into electric signals when the fingers of the user touch the cover plate glass;
the photosensitive sensor is also used for sending the electric signal to the control IC;
the control IC is used for converting the electric signal into a fingerprint signal and carrying out fingerprint identification according to the fingerprint signal.
The application provides a display screen, through laying the photosensitive sensor on the surface of AMOLED panel, make at the in-process of judging whether there is the fingerprint touch and carrying out fingerprint identification, the direct photosensitive sensor through laying on the surface of AMOLED panel converts the light signal of user's finger reflection into the signal of telecommunication, and send the signal of telecommunication that obtains of converting for control IC, make control IC can confirm whether there is the finger touch and carry out fingerprint identification according to this signal of telecommunication, thereby realize in fingerprint identification, improve electronic equipment's screen and account for the ratio.
In one possible implementation, the photosensitive sensors are uniformly laid on the surface of the AMOLED panel.
In a possible implementation manner, the distance between the two photosensitive sensors is equal to or greater than 0.02 mm and equal to or less than 0.2 mm.
In one possible implementation manner, the AMOLED panel includes M pixels in the horizontal direction, the AMOLED panel includes N pixels in the vertical direction, and each adjacent K pixels in the AMOLED panel are provided with one photosensitive sensor; wherein M is an integer of 720 or more, N is an integer of 1080 or more, and K is an integer of 1 or more and 10 or less.
In a possible implementation, an infrared photosensitive element is further included, wherein,
the infrared photosensitive element is arranged on the surface of the AMOLED panel, so that in a screen-off state, a built-in light source of the AMOLED panel is not required to be started, light can be supplemented through the infrared photosensitive element to collect optical signals reflected by fingers of a user, the optical signals are converted into first electric signals, and the control IC202 can determine a finger touch area according to the first electric signals.
In a second aspect, the present application provides an electronic device, which may include:
a memory, a processor and a display screen as shown in any one of the possible implementations of the first aspect described above.
In a third aspect, the present application provides a fingerprint identification method applied to an electronic device, where a display screen of the electronic device includes: the photosensitive sensor, the control integrated circuit IC and the active matrix organic light-emitting diode display the AMOLED panel, the polaroid and the cover plate glass which are arranged in sequence from the AMOLED panel to the cover plate glass; the control IC is connected with the photosensitive sensor; the photosensitive sensor is laid on the surface of the AMOLED panel and arranged between the AMOLED panel and the polaroid; the fingerprint identification method can comprise the following steps:
when a user touches the cover plate glass by a finger, the control IC receives a first electric signal, and the first electric signal is obtained by converting a light signal reflected by the finger of the user by the photosensitive sensor;
the control IC determines a finger touch area according to the first electric signal;
when the control IC receives a fingerprint identification instruction, the control IC converts a second electric signal into a fingerprint signal and carries out fingerprint identification according to the fingerprint signal, and the second electric signal is obtained by converting a photosensitive sensor in a finger touch area according to an optical signal reflected by a finger of a user.
According to the fingerprint identification method, when a user touches the cover plate glass with a finger, the control IC receives a first electric signal obtained by converting an optical signal reflected by the finger of the user through the photosensitive sensor, and determines a finger touch area according to the first electric signal; and then, when a fingerprint identification instruction is received, converting a second electric signal obtained by converting the photosensitive sensor in the finger touch area into a fingerprint signal, and carrying out fingerprint identification according to the fingerprint signal, thereby realizing fingerprint identification and improving the screen occupation ratio of the electronic equipment.
In one possible implementation, the determining, by the control IC, the finger touch area according to the first electrical signal may include:
the control IC determines a primary touch area according to the first electric signal; the control IC determines the central point of the primary touch area; and the control IC determines a finger touch area according to the central point and the size of the preset fingerprint. By determining the finger touch area, in the fingerprint identification process, only the photosensitive sensor in the finger touch area collects the optical signals reflected by the finger of the user, and the photosensitive sensors in other non-finger touch areas do not need to collect the optical signals reflected by the finger of the user, so that the data collection amount is reduced.
In one possible implementation, the determining, by the control IC, the primary touch area according to the first electrical signal may include:
the control IC detects a signal value of the first electric signal;
and if the signal value of the first electric signal is greater than or equal to the reference signal value, the control IC determines that the area where the photosensitive sensor corresponding to the first electric signal is located is the primary touch area.
In one possible implementation, the determining, by the control IC, the finger touch area according to the first electrical signal may include:
the control IC detects a signal value of the first electric signal; the control IC determines the position where the photosensitive sensor with the maximum signal value of the first electric signal is located as the central point of the primary touch area; and the control IC determines a finger touch area according to the central point and the size of the preset fingerprint. By determining the finger touch area, in the fingerprint identification process, only the photosensitive sensor in the finger touch area collects the optical signals reflected by the finger of the user, and the photosensitive sensors in other non-finger touch areas do not need to collect the optical signals reflected by the finger of the user, so that the data collection amount is reduced.
The application provides a display screen, electronic equipment and fingerprint identification method, this display screen includes: the AMOLED display panel comprises a photosensitive sensor, a control Integrated Circuit (IC), an active matrix organic light-emitting diode (AMOLED) panel, a polaroid and cover plate glass, wherein the polaroid is arranged between the AMOLED panel and the cover plate glass, and the control IC is connected with the photosensitive sensor; the photosensitive sensor is laid on the surface of the AMOLED panel and arranged between the AMOLED panel and the polaroid; the photosensitive sensor is used for converting optical signals reflected by the fingers of the user into electric signals when the fingers of the user touch the cover plate glass; the photosensitive sensor is also used for sending the electric signal to the control IC; the control IC is used for converting the electric signal into a fingerprint signal and carrying out fingerprint identification according to the fingerprint signal. Therefore, the display screen provided by the application can be seen, the photosensitive sensor is laid on the surface of the AMOLED panel, so that in the process of judging whether a fingerprint is touched and performing fingerprint identification, the optical signal reflected by the finger of a user is directly converted into the electric signal through the photosensitive sensor laid on the surface of the AMOLED panel, the converted electric signal is sent to the control IC, the control IC can determine whether the finger is touched and performs fingerprint identification according to the electric signal, and therefore the screen occupation ratio of the electronic equipment is improved while the fingerprint identification is performed.
Drawings
Fig. 1 is a schematic structural diagram of a display screen provided in the prior art;
fig. 2 is a schematic structural diagram of a display screen according to an embodiment of the present application;
fig. 3 is a schematic view of a layout manner of a photosensor according to an embodiment of the present disclosure;
fig. 4 is a schematic view of another layout of the photosensitive sensors provided in the embodiment of the present application;
FIG. 5 is a schematic distribution diagram of a first type of photosensitive sensor provided in an embodiment of the present application;
FIG. 6 is a schematic diagram illustrating a distribution of another type of first photosensitive sensors according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram illustrating a method for determining a finger touch area according to a first electrical signal according to an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of another embodiment of the present disclosure for determining a finger touch area according to a first electrical signal;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 10 is a flowchart illustrating a fingerprint identification method according to an embodiment of the present application.
Detailed Description
In order to facilitate unlocking, safe payment and the like, the fingerprint module can be arranged in front of the chin area of the mobile phone, and the fingerprint module in the chin area collects fingerprint signals of users to complete fingerprint identification. However, the display ratio of the display screen is influenced by the mode, so that the screen ratio of the mobile phone is not high. Referring to fig. 1, fig. 1 is a schematic structural diagram of a display screen provided in the prior art, in which a conventional mobile phone display screen includes an Active Matrix Organic Light Emitting diode display (AMOLED) panel, a capacitive touch panel, a polarizer and a cover glass, which are sequentially disposed from inside to outside; when judging whether fingers touch, the capacitive touch panel collects capacitive signals generated by the fingers on the cover plate glass to form magnetic field signals, and then whether the fingers touch is determined according to the magnetic field signals. The display screen comprises a photosensitive sensor, a control Integrated Circuit (IC), an AMOLED panel, a polaroid and cover plate glass, wherein the polaroid is arranged between the AMOLED panel and the cover plate glass, the photosensitive sensor is laid on the surface of the AMOLED screen and arranged between the AMOLED screen and the polaroid. Therefore, compared with the existing display screen, the capacitive touch panel is not arranged in the display screen, the photosensitive sensor is directly laid on the surface of the AMOLED panel, when the touch of a finger and the fingerprint identification are judged, the optical signal reflected by the finger when the finger of a user touches the cover plate glass is collected through the photosensitive sensor, the optical signal is converted into the electrical signal, so that the control IC can determine whether the finger touches according to the electrical signal, and when a fingerprint identification instruction is received, the electrical signal can be converted into the fingerprint information, so that the screen occupation ratio of the electronic equipment is improved while the fingerprint identification is carried out.
The technical means of the present application will be described in detail below with specific examples. It should be noted that the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 2 is a schematic structural diagram of a display screen 20 according to an embodiment of the present disclosure, which is applied to an electronic device, where the electronic device may be a mobile phone or a tablet computer. Referring to fig. 2, the display screen 20 may include:
the AMOLED display panel comprises a photosensitive sensor 201, a control integrated circuit IC202, an AMOLED panel 203, a polarizer 204 and cover glass 205, wherein the polarizer 204 is arranged between the AMOLED panel 203 and the cover glass 205, and the control IC202 is connected with the photosensitive sensor 201.
The photosensitive sensor 201 is laid on the surface of the AMOLED panel 203 and is arranged between the AMOLED panel 203 and the polarizer 204.
The photosensitive sensor 201 is used for converting an optical signal reflected by a finger of a user into an electrical signal when the finger of the user touches the cover glass 205; the photosensor 201 is also used to send an electrical signal to the control IC 202.
The control IC202 is configured to convert the electrical signal into a fingerprint signal and perform fingerprint recognition based on the fingerprint signal.
The application provides a display screen, through laying the photosensitive sensor on the surface of AMOLED panel, make at the in-process of judging whether there is the fingerprint touch and carrying out fingerprint identification, the direct photosensitive sensor through laying on the surface of AMOLED panel converts the light signal of user's finger reflection into the signal of telecommunication, and send the signal of telecommunication that obtains of converting for control IC, make control IC can confirm whether there is the finger touch and carry out fingerprint identification according to this signal of telecommunication, thereby realize in fingerprint identification, improve electronic equipment's screen and account for the ratio.
In the above embodiment, the AMOLED panel 203 includes a Thin Film Transistor (TFT) and an organic light emitting layer, where red, yellow and blue sub-pixels are disposed on the organic light emitting layer, and the three sub-pixels are combined in a specific manner to emit light of different colors; the TFT can accurately control each pixel to form a color image in a matrix arrangement mode. Each pixel at least includes three sub-pixels of Red (R), Green (G) and Blue (B). A common pixel format is the Bayer format, which consists of four subpixels RGBG.
For example, in the embodiment of the present application, when the photosensitive sensor 201 is a photo resistor or a light pipe, the working principle is as follows: under the light irradiation of specific wavelength, the carriers generated by the light are all involved in the conduction, when a user finger touches the cover glass 205, the light reflected by the finger is transmitted to the photoresistor or the light guide tube, when the photon energy is larger than the forbidden bandwidth of the semiconductor material, electrons in the valence band can jump to the conduction band after absorbing the energy of one photon, a positive hole is generated in the valence band, the electrons rush to the anode of the power supply, and the holes rush to the cathode of the power supply, and the number of the carriers in the semiconductor material is increased by the pairs of the electrons and the holes generated by the light irradiation, so that the resistance value of the photoresistor the light guide tube is rapidly reduced, and the optical signal is converted into an electric signal. When the light sensor 201 is a photodiode or a phototriode, the working principle is similar to that of a photoresistor, and the embodiment of the application is not repeated herein.
In the process of judging whether a finger touches and fingerprint identification is carried out, when a user touches the cover plate glass 205 with the finger, the light-sensitive sensor 201 can utilize the refraction and reflection principles of light, the finger is irradiated by a built-in light source of the display screen 20, the emitted light is reflected back to the screen through the surface of the finger, the reflected light penetrates through the polarizer 204 to the light-sensitive sensor 201, the light-sensitive sensor 201 can convert the light signal of the light-sensitive sensor 201 into an electric signal and send the electric signal obtained by conversion to the control IC202, and the control IC202 can calculate the coordinate information of the finger touch according to the electric signal, so that the touch area of the finger can be determined; after determining the finger touch area, the control IC202 may convert the photosensitive sensor 201 in the finger touch area into fingerprint information, in the conversion process, since the ridge line of the fingerprint is in contact with the surface of the cover glass 205, and the valley line is not in contact with the surface of the cover glass 205, the intensities of the corresponding generated electrical signals are different, so as to convert the electrical signals sent by the photosensitive sensor 201 into fingerprint signals, and since the density of the photosensitive sensor 201 is large enough, the control IC202 may combine each fingerprint signal into a fingerprint image, so as to perform fingerprint identification. It should be noted that the control IC202 in the present application may also control the display screen 20 to display, for example, display a picture, or display a message.
Then, what way the photosensitive sensor 201 is laid on the AMOLED panel 203 in determining whether or not there is a finger touch and performing fingerprint recognition? Optionally, in this embodiment of the application, the photosensitive sensor 201 may be laid on the surface of the AMOLED panel 203 in two possible ways, which are specifically as follows:
in a first possible implementation manner, please refer to fig. 3, and fig. 3 is a schematic diagram of a layout manner of a photosensor according to an embodiment of the present application. In fig. 3, the photo sensor 201 is uniformly laid on the surface of the AMOLED panel 203, and may be non-uniformly laid on the surface of the AMOLED panel 203 as long as it is ensured that the photo sensor 201 can cover every area of the surface of the AMOLED panel 203. Further, when uniformly laid, the distance between the two photo sensors 201 is equal to or greater than 0.02 mm, and is equal to or less than any value within 0.2 mm, for example, in the embodiment of the present application, the two photo sensors 201 may be uniformly laid on the surface of the AMOLED panel 203 at an interval of 0.05 mm.
In a second possible implementation manner, please refer to fig. 4, where fig. 4 is a schematic view of another layout manner of the photosensor according to the embodiment of the present application. In fig. 4, the AMOLED panel 203 includes M pixels in the horizontal direction, the AMOLED panel 203 includes N pixels in the vertical direction, and one photosensitive sensor 201 is disposed for each adjacent K pixels in the AMOLED panel 203; wherein M is an integer of 720 or more, N is an integer of 1080 or more, and K is an integer of 1 or more and 10 or less. For example, in the embodiment of the present application, each pixel may be regarded as a small square on the AMOLED panel 203, and each small square (i.e., pixel) may be provided with one photosensitive sensor 201. When the pattern is displayed, the pixels are small and the pixels are arranged on the organic light emitting layer densely, so that the normal display of the pattern is not influenced even if the part provided with the photosensitive sensor has no pixels.
After the photosensitive sensor 201 is laid, when a finger of a user touches the cover glass 205 outside the AMOLED panel 203, if the mobile phone screen is in a bright screen state, a built-in light source of the AMOLED panel 203 emits light, and the photosensitive sensor 201 can directly convert an optical signal reflected by the finger into a first electrical signal; when the mobile phone screen is in the screen-off state, the light source of the AMOLED panel 203 does not emit light, the photosensitive sensor 201 cannot collect the light signal reflected by the finger of the user, and even cannot convert the light signal into the first electric signal, at this time, the control IC202 can control the built-in light source of the AMOLED panel 203 to start, so that the mobile phone screen is changed from the screen-off state to the screen-on state, thereby collecting the light signal reflected by the finger of the user, and converting the light signal into the first electric signal. In addition, when the mobile phone screen is in a screen-off state, an infrared photosensitive element may be disposed on the AMOLED panel 203, so that in the screen-off state, a built-in light source of the AMOLED panel 203 does not need to be started, light can be supplemented through the infrared photosensitive element to collect light signals reflected by a finger of a user, and the light signals are converted into first electrical signals, so that the control IC202 can determine a finger touch area according to the first electrical signals. It should be noted that, in the present application, both the infrared photosensitive element and the photosensitive sensor 201 are disposed on the surface of the AMOLED panel 203, and the disposing manner of the infrared photosensitive element and the photosensitive sensor 201 is similar to that of the photosensitive sensor 201, that is, the infrared photosensitive element may be uniformly laid on the surface of the AMOLED panel 203, and certainly, each adjacent K pixels in the AMOLED panel 203 may also be provided with one infrared photosensitive element, which is not described herein again.
In the process of determining the finger touch area, the control IC202 may control all the light-sensitive sensors 201 laid on the surface of the AMOLED panel 203 to collect optical signals reflected by the finger of the user and receive first electrical signals sent by all the light-sensitive sensors and converted from the optical signals, and of course, in order to reduce the detection amount of data, may also control a part of the sensors laid on the surface of the AMOLED panel 203, that is, the first-type light-sensitive sensor 2011 to collect optical signals reflected by the finger of the user and receive first electrical signals sent by the first-type light-sensitive sensor 2011 and converted from the optical signals. For example, please refer to fig. 5, where fig. 5 is a schematic distribution diagram of a first type of photosensitive sensor 2011 according to an embodiment of the present disclosure. The first photosensitive sensor 2011 may be a photosensitive sensor in a specific row of the AMOLED panel 203, such as odd rows of the first row, the third row, the fifth row, and the seventh row; fig. 6 shows a distribution schematic diagram of another first type of photosensitive sensor 2011 according to an embodiment of the present disclosure; of course, the first, fifth, ninth rows may be equally spaced by a plurality of rows. Here, the first type of photosensitive sensor may be specifically selected according to actual needs, as long as the control IC202 can determine the finger touch area according to the first electrical signal sent by the first type of converter 2011.
Then, how does the control IC202 determine the finger touch area from the first electric signal sent from the first type converter 2011? Optionally, in this embodiment of the application, the determining, by the control IC202, the finger touch area according to the first electrical signal may be implemented in two possible ways, which are as follows:
in a first possible implementation: the control IC202 may determine a primary touch area from the first electrical signal; determining the central point of the primary touch area; and then, determining a finger touch area according to the central point and the size of the preset fingerprint.
Wherein, predetermine the fingerprint size and can set up according to the size of user's fingertip usually. In general, the target collection area may be a circular area centered on the center point, and the diameter of the circular area may be any value within 5 mm or more and 10 mm or less.
To more clearly illustrate the first possible implementation manner, please refer to fig. 7, where fig. 7 is a schematic diagram of determining a finger touch area according to a first electrical signal according to an embodiment of the present application. After determining that the first type of photosensitive sensors 2011 are started, when a finger of a user touches the surface of the cover glass 205, the first type of photosensitive sensors 2011 collects optical signals reflected by the finger of the user, converts the optical signals into first electrical signals, and then sends the first electrical signals to the control IC202, the control IC202 compares a signal value of the first electrical signal of each first type of photosensitive sensor 2011 with a reference signal value, and if the signal value of the first electrical signal is greater than or equal to the reference signal value, it is determined that an area where the photosensitive sensor corresponding to the first electrical signal is located is a primary touch area M (i.e., a contact area between the finger of the user and the cover glass 205); after the primary acquisition area M is determined, the control IC202 may establish a fingerprint model according to the first electrical signal of the first-type photosensor 2011 in the primary acquisition area M, because the electrical signal at the center point of the finger is strongest, and the electrical signal around the center point of the finger is gradually weakened, the established fingerprint model is similar to a spherical model, and a spherical center may be determined according to the spherical model, where the spherical center is the center point a of the primary touch area M, and because the size of the finger tip of the user is limited, after the center point a of the primary touch area M is determined, a circular area with a diameter length of 5 mm, which is the finger touch area MD, may be determined according to the center point a and a preset fingerprint size.
In a second possible implementation: the control IC202 may detect a signal value of the first electric signal of each of the first-type photosensitive sensors 2011; determining the position of the photosensitive sensor with the maximum signal value as the central point of the primary touch area; and then determining a finger touch area according to the central point and the size of the preset fingerprint.
To more clearly illustrate the second possible implementation manner, please refer to fig. 8, where fig. 8 is a schematic diagram of another embodiment of the present application for determining a finger touch area according to a first electrical signal. After determining that the first type of photosensitive sensor 2011 is started, when a finger of a user touches the surface of the cover glass 205, the first type of photosensitive sensor 2011 collects an optical signal reflected by the finger of the user, converts the optical signal into a first electrical signal, and then sends the first electrical signal to the control IC202, the control IC202 can determine the position of the photosensitive sensor with the largest signal value as a central point a of the primary collection area M, and similarly, since the size of the fingertip of the user is limited, after determining the central point a of the primary touch area M, a circular area with the diameter of 5 mm can be determined according to the central point a and the size of a preset fingerprint, and the circular area is a finger touch area.
As shown in fig. 7 and fig. 8, after the finger touch area MD is determined through the two possible implementation manners, the control IC202 may control the second type of photosensitive sensor 2012 in the finger touch area MD to start, receive a second optical signal converted by the second type of photosensitive sensor 2012 in the finger touch area MD according to the optical signal reflected by the finger of the user, and convert the second electrical signal into a fingerprint signal to perform fingerprint identification according to the fingerprint signal. Therefore, when judging whether a finger touches the display screen, the display screen provided by the embodiment of the application collects the optical signal reflected by the finger of the user through a part of the sensors (i.e., the first-type photosensitive sensors 2011) laid on the surface of the AMOLED panel 203, and converts the optical signal into a first electric signal, so that the control IC202 can determine the primary touch area according to the first electric signal; when fingerprint identification is determined, a part of sensors (namely, the second type photosensitive sensors 2012 in the finger touch area) laid on the surface of the AMOLED panel 203 are controlled to start, second optical signals obtained by converting the second type photosensitive sensors 2012 according to optical signals reflected by the fingers of the user are received, and then the second electrical signals are converted into fingerprint signals, so that the screen occupation ratio of the electronic equipment is improved while fingerprint identification is performed. In addition, in the fingerprint identification process, only the second type of photosensitive sensor in the finger touch area collects optical signals reflected by the fingers of the user, and the photosensitive sensors in other non-finger touch areas do not need to collect optical signals reflected by the fingers of the user, so that the data collection amount of the mobile phone is reduced.
In the display screen 20 provided in the embodiment of the application, the display screen 20 includes a photosensitive sensor 201, a control IC202, an AMOLED panel 203, a polarizer 204, and a cover glass 205, which are sequentially disposed from the AMOLED panel 203 to the cover glass 205; the control IC202 is connected to the photosensor 201; wherein, the photosensitive sensor 201 is laid on the surface of the AMOLED panel 203 and is arranged between the AMOLED panel 203 and the polarizer 204; the photosensitive sensor 201 is used for converting an optical signal reflected by a finger of a user into an electrical signal when the finger of the user touches the cover glass 205; the photosensor 201 is also used for sending an electrical signal to the control IC 202; the control IC202 is configured to convert the electrical signal into a fingerprint signal and perform fingerprint recognition based on the fingerprint signal. Therefore, when determining whether a finger touches, the display screen 20 provided in the embodiment of the present application collects the optical signal reflected by the finger of the user through a part of the sensors (i.e., the first type of photosensitive sensors 2011) laid on the surface of the AMOLED panel 203, and converts the optical signal into a first electrical signal, so that the control IC202 can determine the primary touch area according to the first electrical signal; when fingerprint identification is determined, a part of sensors (namely, the second type photosensitive sensors 2012 in the finger touch area) laid on the surface of the AMOLED panel 203 are controlled to start, second optical signals obtained by converting the second type photosensitive sensors 2012 according to optical signals reflected by the fingers of the user are received, and then the second electrical signals are converted into fingerprint signals, so that the screen occupation ratio of the electronic equipment is improved while fingerprint identification is performed. In addition, in the fingerprint identification process, only the second type of photosensitive sensor 2012 in the finger touch area collects the optical signals reflected by the finger of the user, and the photosensitive sensors in other non-finger touch areas do not need to collect the optical signals reflected by the finger of the user, so that the data collection amount of the mobile phone is reduced.
Further, to better illustrate the data volume collected by the mobile phone during the fingerprint recognition process, it is assumed that the AMOLED panel has a size of 6 feet and a length-width ratio of 18: 9, 68.16 mm 136.32 mm, in the whole AMOLED panel area, it is preset that each integer mm of the photosensitive sensors is a first type photosensitive sensor, and 68 x 136-9248 first type photosensitive sensors are total, and in the process of determining the finger touch area through the first type photosensitive sensors, the data amount to be collected is: 9284 bits 12 HZ 13.3M; further, in the process of collecting the optical signal reflected by the user's finger through the second type of photosensitive sensor in the finger touch area, 68 × 136+6 × 1080 × 2160/(68.16 × 136.32) ═ 9248+9038 ═ 18286 photosensitive sensors are in total, and the data volume to be collected is as follows: 18286 bits 120Hz 26.3M, therefore, the display screen provided by the embodiment of the application improves the screen occupation ratio of the electronic device while performing fingerprint identification. In addition, in the fingerprint identification process, only the second type of photosensitive sensor in the finger touch area collects optical signals reflected by the fingers of the user, and the photosensitive sensors in other non-finger touch areas do not need to collect optical signals reflected by the fingers of the user, so that the data collection amount of the mobile phone is reduced.
Fig. 9 is a schematic structural diagram of an electronic device 90 according to an embodiment of the present application, please refer to fig. 9, where the electronic device 90 may include:
a memory 901, a processor 902 and a display 20 as shown in the above embodiments.
The electronic device 90 shown in the embodiment of the application can execute the technical solution shown in the embodiment of the display screen 20, and the implementation principle and the beneficial effect thereof are similar and will not be described again here.
Fig. 10 is a schematic flowchart of a fingerprint identification method provided in an embodiment of the present application, and is applied to an electronic device, where a display screen of the electronic device includes: the photosensitive sensor, the control integrated circuit IC and the active matrix organic light-emitting diode display the AMOLED panel, the polaroid and the cover plate glass which are arranged in sequence from the AMOLED panel to the cover plate glass; the control IC is connected with the photosensitive sensor; as shown in fig. 10, the fingerprint identification method includes:
and S1001, when the user touches the cover glass with a finger, the control IC receives a first electric signal.
The first electric signal is obtained by converting the light signal reflected by the finger of the user through the photosensitive sensor.
And S1002, determining a finger touch area by the control IC according to the first electric signal.
And S1003, when the control IC receives the fingerprint identification instruction, the control IC converts the second electric signal into a fingerprint signal and carries out fingerprint identification according to the fingerprint signal.
The second electric signal is obtained by converting the photosensitive sensor in the finger touch area according to the optical signal reflected by the finger of the user.
Optionally, in this embodiment of the application, the S1002 control IC determines the finger touch area according to the first electrical signal, which may be implemented in two possible ways:
in a first possible implementation: the control IC determines a primary touch area according to the first electric signal; then determining the central point of the primary touch area; and determining a finger touch area according to the central point and the size of the preset fingerprint.
Wherein the determining of the primary touch area by the control IC according to the first electrical signal may include:
the control IC detects a signal value of the first electric signal; and if the signal value of the first electric signal is greater than or equal to the reference signal value, determining that the area where the photosensitive sensor corresponding to the first electric signal is located is a primary touch area.
In a second possible implementation: the control IC detects a signal value of the first electric signal; determining the position of the photosensitive sensor with the maximum signal value of the first electric signal as the central point of the primary touch area; and determining a finger touch area according to the central point and the size of the preset fingerprint.
The fingerprint identification method in the embodiment of the application can be realized by the technical scheme in the embodiment of the display screen, the realization principle and the beneficial effect are similar, and the description is omitted here.

Claims (9)

1. A display screen is applied to an electronic device, and the display screen comprises:
the AMOLED display panel comprises a photosensitive sensor, a control IC, an active matrix organic light-emitting diode display AMOLED panel, a polaroid and cover plate glass, wherein the polaroid is arranged between the AMOLED panel and the cover plate glass, and the control IC is connected with the photosensitive sensor;
wherein the photosensitive sensor is paved on the surface of the AMOLED panel and arranged between the AMOLED panel and the polarizer;
the photosensitive sensor is used for converting an optical signal reflected by a finger of a user into a first electric signal when the finger of the user touches the cover plate glass;
the photosensitive sensor is also used for sending the first electric signal to the control IC;
the control IC is used for converting a second electric signal into a fingerprint signal when receiving a fingerprint identification instruction, and carrying out fingerprint identification according to the fingerprint signal, wherein the second electric signal is obtained by converting a photosensitive sensor in the finger touch area according to an optical signal reflected by a finger of a user;
the distance between the two photosensitive sensors is not less than 0.02 mm and not more than 0.2 mm.
2. Display screen according to claim 1,
the photosensitive sensors are uniformly laid on the surface of the AMOLED panel.
3. Display screen according to claim 1,
the AMOLED panel comprises M pixels in the transverse direction, N pixels in the longitudinal direction, and a photosensitive sensor is correspondingly arranged on each adjacent K pixels in the AMOLED panel; wherein M is an integer of 720 or more, N is an integer of 1080 or more, and K is an integer of 1 or more and 10 or less.
4. A display screen in accordance with any one of claims 1-3, further comprising an infrared light sensitive element, wherein,
the infrared photosensitive element is arranged on the surface of the AMOLED panel.
5. An electronic device, comprising:
a memory, a processor and a display screen as claimed in any one of the preceding claims 1 to 4.
6. A fingerprint identification method is applied to electronic equipment, and a display screen of the electronic equipment comprises the following steps: the photosensitive sensor, the control IC and the active matrix organic light-emitting diode display the AMOLED panel, the polaroid and the cover plate glass which are arranged in sequence from the AMOLED panel to the cover plate glass; the control IC is connected with the photosensitive sensor; wherein the photosensitive sensor is paved on the surface of the AMOLED panel and arranged between the AMOLED panel and the polarizer; the fingerprint identification method comprises the following steps:
when a user touches the cover plate glass with a finger, the control IC receives a first electric signal, and the first electric signal is obtained by converting an optical signal reflected by the finger of the user by the photosensitive sensor;
the control IC determines a finger touch area according to the first electric signal;
when the control IC receives a fingerprint identification instruction, the control IC converts a second electric signal into a fingerprint signal and carries out fingerprint identification according to the fingerprint signal, wherein the second electric signal is obtained by converting a photosensitive sensor in the finger touch area according to an optical signal reflected by a finger of a user;
the distance between the two photosensitive sensors is not less than 0.02 mm and not more than 0.2 mm.
7. The method of claim 6, wherein determining, by the control IC, a finger touch area based on the first electrical signal comprises:
the control IC determines a primary touch area according to the first electric signal;
the control IC determines a center point of the primary touch area;
and the control IC determines the finger touch area according to the central point and the size of a preset fingerprint.
8. The method of claim 7, wherein the control IC determines a primary touch area based on the first electrical signal, comprising:
the control IC detects a signal value of the first electric signal;
and if the signal value of the first electric signal is greater than or equal to the reference signal value, the control IC determines that the area where the photosensitive sensor corresponding to the first electric signal is located is the primary touch area.
9. The method of claim 7, wherein determining, by the control IC, a finger touch area based on the first electrical signal comprises:
the control IC detects a signal value of the first electric signal;
the control IC determines that the position of the photosensitive sensor with the maximum signal value of the first electric signal is the central point of the primary touch area;
and the control IC determines the finger touch area according to the central point and the size of a preset fingerprint.
CN201710650785.0A 2017-08-02 2017-08-02 Display screen, electronic equipment and fingerprint identification method Active CN109376569B (en)

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