CN109359638B - Sliding fingerprint identification method, array substrate, display panel and display device - Google Patents
Sliding fingerprint identification method, array substrate, display panel and display device Download PDFInfo
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- CN109359638B CN109359638B CN201811550175.4A CN201811550175A CN109359638B CN 109359638 B CN109359638 B CN 109359638B CN 201811550175 A CN201811550175 A CN 201811550175A CN 109359638 B CN109359638 B CN 109359638B
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- 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
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Abstract
The embodiment of the invention discloses a sliding fingerprint identification method, an array substrate, a display panel and a display device, wherein the fingerprint identification method comprises the following steps: when a finger touches the array substrate, determining an area covered by the current finger; dividing a region covered by a current finger into at least two sub-regions, wherein the at least two sub-regions are sequentially arranged along the column direction of the first array structure; selecting at least one row of fingerprint identification units in each sub-area as a reference row; starting the fingerprint identification units positioned in the reference rows; recording fingerprint identification signals of the fingerprint identification units in the reference lines in a time period from t1 to t2, wherein t1 < t 2; fingerprint information is obtained based on fingerprint identification signals of the fingerprint identification units in the reference rows within a time period from t1 to t2, so that power consumption of the display panel is reduced.
Description
Technical Field
The invention relates to the technical field of fingerprint identification, in particular to a sliding fingerprint identification method, an array substrate, a display panel and a display device.
Background
The skin lines including fingerprints of each person are different from pattern to pattern, break points and cross points, and are unique and invariable throughout the life. Accordingly, a person can be identified by associating his fingerprint with the person, and by comparing his fingerprint with the pre-stored fingerprint data, the person can verify his true identity, which is known as a fingerprint identification technique. Thanks to the electronic integrated manufacturing technology and the fast and reliable algorithm research, the optical fingerprint identification technology in the fingerprint identification technology has started to enter our daily life, and becomes the most deep, widely applied and mature technology in the current biological detection science.
At present, fingerprint identification technology and display technology are combined together usually to make display panel not only have normal display function, can also carry out fingerprint identification, richened display panel's function, improved display panel's security performance. In order to make the display panel have higher identification accuracy, a large number of fingerprint identification units are required to be arranged in the existing display panel. When a finger slides on the display panel, all the fingerprint identification units are simultaneously started to perform fingerprint identification. In the process of executing the sliding fingerprint identification method, because all fingerprint identification units need to be started, the power consumption is overlarge, and the method is contrary to the development trend of low power consumption of a display panel.
Disclosure of Invention
The invention provides a sliding fingerprint identification method, an array substrate, a display panel and a display device, which are used for reducing the power consumption of the display panel.
In a first aspect, an embodiment of the present invention provides a sliding fingerprint identification method, where the sliding fingerprint identification method is applied to an array substrate, where the array substrate includes:
a substrate base plate;
a plurality of pixel units arranged in a first array structure formed on the substrate base plate;
a plurality of fingerprint identification units arranged in a second array structure formed on the substrate base plate;
the row direction of the first array structure is parallel to the row direction of the second array structure, and the column direction of the first array structure is parallel to the column direction of the second array structure;
every two adjacent rows of the fingerprint identification units are spaced by M rows of the pixel units, M is more than or equal to 1 and less than or equal to 140, and M is a positive integer;
the fingerprint identification method comprises the following steps:
when a finger touches the array substrate, determining an area covered by the current finger;
dividing a region covered by a current finger into at least two sub-regions, wherein the at least two sub-regions are sequentially arranged along the column direction of the first array structure;
selecting at least one row of fingerprint identification units in each sub-area as a reference row;
starting the fingerprint identification units positioned in the reference rows;
recording fingerprint identification signals of the fingerprint identification units in the reference lines in a time period from t1 to t2, wherein t1 < t 2;
fingerprint information is obtained based on fingerprint identification signals of the fingerprint identification units in the reference lines in a time period from t1 to t 2.
In a second aspect, an embodiment of the present invention further provides an array substrate, where the array substrate is an array substrate to which any one of the sliding fingerprint identification methods provided in the embodiment of the present invention is applied;
the array substrate further comprises a plurality of control signal lines extending along the row direction of the first array structure;
in the same row, each fingerprint identification unit is electrically connected with the same control signal line, and the fingerprint identification units belonging to different rows are electrically connected with different control signal lines.
In a third aspect, an embodiment of the present invention further provides a display panel, including any one of the array substrates provided in the embodiments of the present invention.
In a fourth aspect, an embodiment of the present invention further provides a display device, including any one of the display panels provided in the embodiments of the present invention.
According to the embodiment of the invention, when a finger touches the array substrate, the area covered by the current finger is determined; dividing a region covered by a current finger into at least two sub-regions, wherein the at least two sub-regions are sequentially arranged along the column direction of the first array structure; selecting at least one row of fingerprint identification units in each sub-area as a reference row; starting the fingerprint identification units positioned in the reference rows; recording fingerprint identification signals of the fingerprint identification units in the reference lines in a time period from t1 to t 2; the fingerprint information is obtained based on the fingerprint identification signals of the fingerprint identification units in the reference rows within the time period from t1 to t2, the problem that power consumption is overlarge due to the fact that all the fingerprint identification units need to be started in the executing process of the existing sliding fingerprint identification method is solved, and the effect of reducing the power consumption of the display panel is achieved.
Drawings
Fig. 1 is a flowchart of a sliding fingerprint identification method according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an array substrate according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a finger in a first relative position relationship with an array substrate provided herein during a sliding process;
FIG. 4 is a schematic view of a finger in a second relative position relationship with the array substrate provided herein during a sliding process;
fig. 5 is a schematic structural diagram of another array substrate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a sliding fingerprint identification method according to an embodiment of the present disclosure. Fig. 2 is a schematic structural diagram of an array substrate according to an embodiment of the present disclosure. The sliding fingerprint identification method provided by the embodiment of the application is suitable for any array substrate provided by the embodiment of the application.
Specifically, referring to fig. 2, the array substrate includes: a base substrate 10; a plurality of pixel units 11 arranged in a first array structure formed on the substrate 10 (for example, the pixel units 11 in fig. 2 include a pixel unit R emitting red light, a pixel unit G emitting green light, and a pixel unit B emitting blue light); a plurality of fingerprint identification units 12 arranged in a second array structure formed on the substrate base plate 10; the row direction (X-axis direction in fig. 2) of the first array structure is parallel to the row direction of the second array structure, and the column direction (Y-axis direction in fig. 2) of the first array structure is parallel to the column direction of the second array structure; the fingerprint identification units 12 in two adjacent rows are separated by M rows of pixel units 11, M is more than or equal to 1 and less than or equal to 140, and M is a positive integer.
Fig. 3 is a schematic view of a finger and the array substrate provided in the present application in a first relative position relationship during a sliding process. Fig. 4 is a schematic view of a finger and the array substrate provided in the present application in a second relative position relationship during the sliding process. In order to clearly illustrate the sliding fingerprint recognition method, the pixel unit is not shown in fig. 3 and 4. Referring to fig. 1, 3 and 4, the sliding fingerprint recognition method includes:
and S110, determining the area covered by the current finger when the finger touches the array substrate.
The specific implementation method of this step is various, and exemplarily, all the fingerprint identification units may be simultaneously turned on, and the area covered by the current finger is determined by judging the signal change condition of each fingerprint identification unit. Alternatively, it is preset that when a finger touches a certain area a on the array substrate, the electronic device including the array substrate performs a certain specific response operation B (e.g., opens a certain application program). Thus, after the electronic equipment executes the response operation B, the area covered by the current finger is determined to be the area A.
Optionally, the array substrate may further include a touch electrode; the specific implementation manner of the step is that whether a finger touches the array substrate at present is judged through a touch position detection signal of the touch electrode; if yes, determining the area covered by the current finger. Since the display panel is basically provided with the touch electrodes, the arrangement substantially utilizes the existing touch electrodes to determine the area covered by the current finger, and no additional device is needed, so that the display panel is more universal.
And S120, dividing the area covered by the current finger into at least two sub-areas, wherein the at least two sub-areas are sequentially arranged along the column direction of the first array structure.
Illustratively, referring to fig. 3, the area covered by the current finger 20 is divided into two sub-areas, sub-area S1 and sub-area S2, which are sequentially arranged along the column direction (i.e., the Y-axis direction in the figure) of the first array structure.
Since the current finger 20 covers four rows of fingerprint identification units 12, which are respectively the nth row fingerprint identification unit, the (n + 1) th row fingerprint identification unit, the (n + 2) th row fingerprint identification unit and the (n + 3) th row fingerprint identification unit. Wherein the nth row fingerprint identification unit and the (n + 1) th row fingerprint identification unit are located in the sub-area S1. The (n + 2) th row fingerprint identification unit and the (n + 3) th row fingerprint identification unit are located in the sub-area S2.
S130, selecting at least one row of fingerprint identification units in each sub-area as a reference row.
In fig. 3, since the nth row fingerprint identification unit and the (n + 1) th row fingerprint identification unit are located in the sub-area S1, the nth row fingerprint identification unit and/or the (n + 1) th row fingerprint identification unit may be used as a reference row of the sub-area S1. The n +2 th row fingerprint identification unit and the n +3 th row fingerprint identification unit are located in the sub-area S2, and the n +2 th row fingerprint identification unit and/or the n +3 th row fingerprint identification unit may be used as the reference row of the sub-area S2.
For the sake of convenience of description, only the (n + 1) th row of fingerprint identification cells is used as the reference row of the sub-region S1, and only the (n + 3) th row of fingerprint identification cells is used as the reference row of the sub-region S2.
And S140, starting the fingerprint identification units positioned in the reference rows.
Illustratively, referring to fig. 3, the (n + 1) th row fingerprint identification unit and the (n + 3) th row fingerprint identification unit are turned on.
And S150, recording the fingerprint identification signals of the fingerprint identification units in each reference row in the time period from t1 to t2, wherein t1 is less than t 2.
For example, referring to fig. 3 and 4, if the finger 20 slides in the reverse direction along the Y axis, it is assumed that the relative positional relationship between the finger 20 and the array substrate at time t1 is as shown in fig. 3, and the relative positional relationship between the finger 20 and the array substrate at time t2 is as shown in fig. 4. By comparing fig. 3 and 4, it can be seen that the relative positions of the finger 20 and the fingerprint identification unit of the (n + 1) th row are changed with the passage of time. In fact, the (n + 1) th row of fingerprint identification cells corresponds to different positions of the finger 20 at different times during the time period from t1 to t 2. Similarly, during the time period from t1 to t2, the (n + 3) th row of fingerprint identification cells correspond to different positions of the finger 20 at different times.
By recording the fingerprint identification signals of the fingerprint identification units in the reference rows from t1 to t2, the fingerprint identification signals of different positions on the finger are collected by the fingerprint identification units in the reference rows in the process of sliding the finger.
Because the (n + 1) th row fingerprint identification unit and the (n + 3) th row fingerprint identification unit work simultaneously, the length of the time period from t1 to t2 can be reasonably determined, so that the (n + 1) th row fingerprint identification unit only collects the fingerprint of the upper half part 21 of the finger 20, and the (n + 3) th row fingerprint identification unit only collects the fingerprint of the lower half part 22 of the finger 20.
And S160, obtaining fingerprint information based on the fingerprint identification signals of the fingerprint identification units in the reference rows in the time period from t1 to t 2.
The essence of this step is to combine the fingerprint signals of different positions on the finger 20 collected by the fingerprint identification units 12 in the reference row to obtain a complete fingerprint signal of the finger 20.
Above-mentioned technical scheme is carrying out the in-process of discerning to the slip fingerprint, only need open the fingerprint identification unit of reference line, and not all fingerprint identification units on the array substrate, just can discern the fingerprint. Obviously, compared with the existing array substrate or display panel, the technical scheme provided by the application is beneficial to reducing the power consumption of the array substrate.
In the process of actually identifying the sliding fingerprint, the area covered by the current finger is not divided into at least two sub-areas, but a row of fingerprint identification units in the area covered by the current finger is directly selected as a reference row to carry out sliding fingerprint identification. Thus the reference row needs to collect the entire finger fingerprint information. Compared with this method, in the technical solution provided by the present application, the purpose of dividing the area covered by the current finger into at least two sub-areas (for example, as the sub-areas S1 and S2 in fig. 3) is to divide the finger into at least two parts (for example, as the upper half 21 and the lower half 22 in fig. 3), so that in the subsequent steps, by reasonably determining the length of the time period from t1 to t2, only the fingerprint information collection of the part corresponding to the finger is completed by the reference line fingerprint identification unit in each sub-area (for example, in fig. 3 and 4, the fingerprint of the upper half 21 is collected by the reference line in the sub-area S1, and the fingerprint of the lower half 22 is collected by the reference line in the sub-area S2), that is not the whole finger fingerprint information collection. Thus, the time spent in fingerprint identification is reduced, the efficiency of fingerprint identification is improved, and the sensitivity of fingerprint identification is improved.
It should be noted that, in the above technical solution, in order to enable the array substrate to have the above-mentioned function of sliding fingerprint identification, when it is necessary to ensure that a finger touches any position of the array substrate, the finger can cover at least two rows of fingerprint identification units. In terms of resolution of the currently mainstream display panel, when a finger touches the display panel in a forbidden state, the finger often covers 280 rows and more than 280 rows of pixel units, so optionally, two adjacent rows of fingerprint identification units are arranged at an interval of M rows of pixel units, where M is greater than or equal to 1 and less than or equal to 140, so that when the finger touches any position of the array substrate, the finger can cover at least two rows of fingerprint identification units, and further, the sliding fingerprint identification function is realized.
Further, on the basis of the above technical solution, optionally, M is greater than or equal to 1 and less than or equal to 70, before executing S140, the method further includes selecting at least one sub-region from the at least two sub-regions as a finger sliding direction determination region; selecting a row of fingerprint identification units except the reference row as a reference row in the finger sliding direction judgment area; executing S140, and starting the fingerprint identification unit positioned in the reference row; after executing S140, the method further includes: recording fingerprint identification signals of fingerprint identification units in a reference row in a time period from t1 to t 3; judging whether time t4 exists or not, wherein the ratio of the fingerprint identification signals of the fingerprint identification units in the reference row to the fingerprint identification signals of the fingerprint identification units in the reference row corresponding to the time t1 is greater than or equal to 0.9 and less than or equal to 1.1 at time t4, wherein t1 is greater than t4 and less than t 3; if so, the sliding direction of the fingerprint of the current user points to the corresponding reference line from the reference line.
For example, with continued reference to fig. 3, assuming that the sub-region S1 is selected as the finger sliding direction determination region, the nth row of fingerprint identification cells in the sub-region S1 may be used as the reference row. If the finger slides along the positive direction of the Y axis, the relative position of the finger and the nth row of fingerprint identification units is changed continuously, so that the nth row of fingerprint identification units correspond to different positions of the finger at different moments. If the ratio of the fingerprint identification signal of each fingerprint identification unit in the reference row (i.e. the nth row) to the fingerprint identification signal of the fingerprint identification unit in the reference row (i.e. the n +1 th row) corresponding to the time t1 is greater than or equal to 0.9 and less than or equal to 1.1 at the time t4, the area corresponding to the reference row and the finger at the time t4 and the area corresponding to the reference row and the finger at the time t1 are considered to be the same area. In other words, from time t1 to time t4, an area on the finger slides from the base line to the reference line. Therefore, the direction pointed by the reference line (i.e. the n +1 th line) to the reference line (i.e. the n th line) corresponding to the reference line can be taken as the sliding direction of the fingerprint of the current user.
According to the technical scheme, the reference line is determined, the sliding direction of the fingerprint of the current user is judged according to the reference line and the reference line, so that the display panel has the function of judging the sliding direction of the fingerprint of the user, and the user experience can be improved.
In the above technical solution, in order to make the array substrate have the function of identifying the sliding direction of the fingerprint, when it is required to ensure that a finger touches any position of the array substrate, the finger can cover at least four rows of fingerprint identification units. In terms of resolution of the currently mainstream display panel, when a finger touches the display panel in a static state, the finger often covers 280 rows and more than 280 rows of pixel units, so optionally, two adjacent rows of fingerprint identification units are arranged at an interval of M rows of pixel units, where M is greater than or equal to 1 and less than or equal to 70, so that when the finger touches any position of the array substrate, the finger can cover at least four rows of fingerprint identification units, and further, the fingerprint sliding direction identification function is realized.
In the above technical solution, the fingerprint identification unit may be an optical fingerprint identification unit, a silicon chip fingerprint identification unit, or an ultrasonic fingerprint identification unit, and the application is not limited thereto.
The identification principle of the optical fingerprint identification unit is briefly described as an example. The display panel comprises an optical fingerprint identification unit and a fingerprint identification light source. When fingerprint identification is carried out, light rays emitted by the fingerprint identification light source are reflected by a touch main body (such as a finger) to form reflected light to be incident to the fingerprint identification unit, and the fingerprint identification unit converts light signals collected by the fingerprint identification unit into electric signals. Since the ridge pressed in the touch body (such as a finger) of the display panel is in contact with the surface of the display panel, the valley is not in contact with the surface of the display panel, so that the reflectivity of light irradiated on the valley and the ridge of the touch body is different, and further the intensity of reflected light formed at the position of the ridge and reflected light formed at the position of the valley received by the fingerprint identification unit is different, so that the magnitude of photocurrent converted from the reflected light formed at the position of the ridge and the reflected light formed at the position of the valley is different. Fingerprint identification can be carried out according to the magnitude of the photocurrent.
On the basis of the technical scheme, optionally, if the time when the finger stops touching the array substrate is t5, t2 is not less than t5, and t3 is not less than t 5. The purpose of setting up like this is that the fingerprint identification unit of control every benchmark line and reference line turns off in time to further reduce the power consumption of display panel, improve the standby time of display panel, improve user satisfaction.
There are various methods for determining the time t5 when the finger stops touching the array substrate, for example, if the array substrate further includes a touch electrode, the time t5 when the finger stops touching the array substrate may be determined depending on a sensing signal of the touch electrode.
In the foregoing technical solutions, if the array substrate further includes a touch electrode, the touch electrode may be a self-capacitance type touch electrode or a mutual capacitance type touch electrode, which is not limited in this application.
The embodiment of the invention also provides an array substrate, and fig. 5 is a schematic structural diagram of another array substrate provided by the embodiment of the invention. Referring to fig. 5, the array substrate is an array substrate to which the above-described sliding fingerprint identification method is applied. Compared with fig. 2, the array substrate in fig. 5 further includes a control signal line 13. Specifically, referring to fig. 5, the array substrate further includes a plurality of control signal lines 13 extending in a row direction (X-axis direction in fig. 5) of the first array structure; in the same row, each fingerprint identification unit 12 is electrically connected with the same control signal line 13, and fingerprint identification units 12 belonging to different rows are electrically connected with different control signal lines 13. This allows the operating state of the line fingerprint identification unit 12 to be controlled using the same control signal line 13. Compared with the scheme that each fingerprint identification unit 12 is connected with one control signal line 13, the arrangement can reduce the number of the control signal lines 13, further reduce the manufacturing difficulty of the array substrate and improve the yield of the display panel.
With continued reference to fig. 5, optionally, the array substrate further includes a plurality of signal output lines 14 extending in a column direction (Y-axis direction in fig. 5) of the first array structure; in the same row, the fingerprint identification units 12 are electrically connected with the same signal output line 14, and the fingerprint identification units 12 belonging to different rows are electrically connected with different signal output lines 14. The fingerprint identification signals thus arranged for the fingerprint identification units 12 in the same column may be output on the same signal output line 14. Compared with the scheme that each fingerprint identification unit 12 is connected with one signal output line 14, the arrangement can reduce the number of the signal output lines 14, further reduce the manufacturing difficulty of the array substrate and improve the yield of the display panel.
Optionally, on the basis of the above technical solution, the array substrate further includes a plurality of scan lines and a plurality of data lines; the row direction of the first array structure is parallel to the extending direction of the scanning line, and the column direction of the first array structure is parallel to the extending direction of the data line. The essence of the arrangement is that the control signal lines 13 are parallel to the scanning lines, the signal output lines 14 are parallel to the data lines, the occurrence of short circuit or open circuit problems occurring in the manufacturing process of the control signal lines 13 and the scanning lines and the manufacturing process of the signal output lines 14 and the data lines is reduced, and the yield of the display panel is improved. The signal output line 14 and the data line are in the same film layer and manufactured by the same manufacturing process. Therefore, the manufacturing process of the display panel can be further simplified, the use number of the mask plates is reduced, the production cost is reduced, and the manufacturing efficiency of the display panel is improved.
Similarly, the column direction of the first array structure may be arranged parallel to the extending direction of the scan line, and the row direction of the first array structure may be arranged parallel to the extending direction of the data line.
Based on the same inventive concept, the embodiment of the invention also provides a display panel. Fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Referring to fig. 6, the display panel 201 includes any one of the array substrates 100 provided in the embodiments of the present invention.
Since the display panel includes any one of the array substrates provided by the embodiments of the present invention, the display panel has the same or corresponding beneficial effects as the array substrate included therein, and details are not repeated herein.
Alternatively, the display panel may be specifically a liquid crystal display panel, an organic light emitting display panel, or electronic paper.
If the display panel 201 is a liquid crystal display panel, referring to fig. 6, optionally, the display panel 201 may further include a color filter substrate 200 opposite to the array substrate 100, and a liquid crystal layer 300 sandwiched between the array substrate 100 and the color filter substrate 200.
Based on the same inventive concept, the embodiment of the invention also provides a display device. Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 7, the display device 101 includes any one of the display panels 201 according to the embodiment of the present invention.
Since the display device includes any one of the display panels provided in the embodiments of the present invention, the display panel has the same or corresponding beneficial effects as the display panel included therein, and details are not repeated herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A sliding fingerprint identification method is characterized by being applied to an array substrate, wherein the array substrate comprises:
a substrate base plate;
a plurality of pixel units arranged in a first array structure formed on the substrate base plate;
a plurality of fingerprint identification units arranged in a second array structure formed on the substrate base plate;
the row direction of the first array structure is parallel to the row direction of the second array structure, and the column direction of the first array structure is parallel to the column direction of the second array structure;
every two adjacent rows of the fingerprint identification units are spaced by M rows of the pixel units, M is more than or equal to 1 and less than or equal to 140, and M is a positive integer;
the fingerprint identification method comprises the following steps:
when a finger touches the array substrate, determining an area covered by the current finger;
dividing a region covered by a current finger into at least two sub-regions, wherein the at least two sub-regions are sequentially arranged along the column direction of the first array structure;
selecting at least one row of fingerprint identification units in each sub-area as a reference row;
starting the fingerprint identification units positioned in the reference rows;
recording fingerprint identification signals of the fingerprint identification units in the reference lines in a time period from t1 to t2, wherein t1 < t 2;
fingerprint information is obtained based on fingerprint identification signals of the fingerprint identification units in the reference lines in a time period from t1 to t 2.
2. The sliding fingerprint recognition method of claim 1,
1≤M≤70；
the opening is located before the fingerprint identification unit of each reference line, and further comprises,
selecting at least one sub-area from the at least two sub-areas as a finger sliding direction judgment area;
selecting a row of the fingerprint identification units except the reference row as a reference row in the finger sliding direction judgment area;
the step of starting the fingerprint identification units positioned in the reference rows simultaneously further comprises starting the fingerprint identification units positioned in the reference rows;
after the step of starting the fingerprint identification units positioned in the reference rows, the step of starting further comprises:
recording fingerprint identification signals of all the fingerprint identification units in the reference row in a time period from t1 to t 3;
judging whether a time t4 exists or not, wherein the ratio of the fingerprint identification signals of the fingerprint identification units in the reference row to the fingerprint identification signals of the fingerprint identification units in the reference row corresponding to the time t1 is greater than or equal to 0.9 and less than or equal to 1.1 at the time t4, wherein t1 is greater than t4 and is not greater than t 3;
if so, the sliding direction of the fingerprint of the current user points to the reference line corresponding to the reference line from the reference line.
3. The sliding fingerprint recognition method of claim 2,
if the time when the finger stops touching the array substrate is t5, t2 is not less than t5, and t3 is not less than t 5.
4. The sliding fingerprint recognition method of claim 1,
the array substrate further comprises a touch electrode;
when the finger touches the array substrate, determining an area covered by the current finger includes:
judging whether a finger touches the array substrate currently or not according to the touch position detection signal of the touch electrode;
if yes, determining the area covered by the current finger.
5. An array substrate, wherein the array substrate is an array substrate suitable for the sliding fingerprint identification method according to any one of claims 1 to 4;
the array substrate further comprises a plurality of control signal lines extending along the row direction of the first array structure;
in the same row, each fingerprint identification unit is electrically connected with the same control signal line, and the fingerprint identification units belonging to different rows are electrically connected with different control signal lines.
6. The array substrate of claim 5, further comprising a plurality of signal output lines extending in a column direction of the first array structure;
in the same row, each fingerprint identification unit is electrically connected with the same signal output line, and the fingerprint identification units belonging to different rows are electrically connected with different signal output lines.
7. The array substrate of claim 6, further comprising a plurality of scan lines and a plurality of data lines;
the row direction of the first array structure is parallel to the extending direction of the scanning line, and the column direction of the first array structure is parallel to the extending direction of the data line; or
The array direction of the first array structure is parallel to the extending direction of the scanning line, and the row direction of the first array structure is parallel to the extending direction of the data line.
8. A display panel comprising the array substrate according to any one of claims 5 to 7.
9. A display device characterized by comprising the display panel according to claim 8.
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