CN112560798B - Display panel, fingerprint identification driving method thereof and display device - Google Patents
Display panel, fingerprint identification driving method thereof and display device Download PDFInfo
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- CN112560798B CN112560798B CN202011630954.2A CN202011630954A CN112560798B CN 112560798 B CN112560798 B CN 112560798B CN 202011630954 A CN202011630954 A CN 202011630954A CN 112560798 B CN112560798 B CN 112560798B
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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
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- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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Abstract
The invention provides a display panel, a fingerprint identification driving method thereof and a display device. The display panel includes: the touch control module is used for detecting a touch position; a plurality of fingerprint identification areas; the scanning driving module is used for generating scanning signals; the processing module is used for determining a target fingerprint identification area and dividing the target fingerprint identification area into a target area and a non-target area; and the control module is used for controlling the scanning driving module to execute different scanning schemes on the target area and the non-target area, wherein the target area is scanned by a first scanning scheme, the non-target area is scanned by a second scanning scheme, and the scanning time of the first scanning scheme is longer than that of the second scanning scheme. The display panel, the fingerprint identification driving method thereof and the display device provided by the embodiment of the invention can enable the scanning time of the area with effective fingerprint information to be longer, improve the fingerprint scanning effect and increase the user experience.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display panel, a fingerprint identification driving method thereof and a display device.
Background
More and more electronic equipment is provided with fingerprint sensors, and the purpose of distinguishing the identity of a user can be achieved by collecting and identifying the fingerprint of the user, so that the function switch control of the mobile equipment is realized more conveniently. To the display panel who has the fingerprint identification function, for the comprehensive screen design of better realization, avoid the fingerprint identification area to occupy the space in non-display area, can adopt fingerprint technique under the screen at present to set up whole display area into the fingerprint identification area, promptly, correspond in the whole display area and be provided with a plurality of fingerprint identification units.
For the full-screen fingerprint identification display panel, in order to provide the fingerprint identification unit with sufficient detection time to improve the fingerprint identification accuracy, the scanning time of the fingerprint identification unit is not short enough, which results in a long scanning period of fingerprint identification and affects the detection performance.
Disclosure of Invention
The embodiment of the invention provides a display panel, a fingerprint identification driving method thereof and a display device, which can enable the scanning time of an area with effective fingerprint information to be longer, improve the fingerprint scanning effect and increase the user experience.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the touch control module is used for detecting the touch position of the touch main body on the display panel;
the fingerprint identification device comprises a plurality of fingerprint identification areas, a plurality of fingerprint identification units and a control unit, wherein each fingerprint identification area is internally provided with a plurality of fingerprint identification units;
the scanning driving module is electrically connected with the fingerprint identification unit and used for generating a scanning signal;
the processing module is used for determining a target fingerprint identification area according to the touch position and dividing the target fingerprint identification area into a target area and a non-target area, wherein the target fingerprint identification area is the fingerprint identification area where the touch position is located, the target area is an area where at least one part of fingerprint information exists in the target fingerprint identification area, and the non-target area is an area outside the target area in the target fingerprint identification area;
and the control module is used for controlling the scanning driving module to scan the target fingerprint identification area according to the position information of the target fingerprint identification area determined by the processing module so as to carry out fingerprint identification, and controlling the scanning driving module to execute different scanning schemes on the target area and the non-target area according to the position information of the target area and the non-target area determined by the processing module, wherein the target area is scanned by a first scanning scheme, the non-target area is scanned by a second scanning scheme, and the scanning time of the first scanning scheme is longer than that of the second scanning scheme.
In a second aspect, an embodiment of the present invention provides a fingerprint identification driving method, applied to the display panel provided in the first aspect of the present invention, where the fingerprint identification driving method includes:
the touch control module detects a touch position of a touch main body on the display panel;
the processing module determines a target fingerprint identification area according to the touch position, and divides the target fingerprint identification area into a target area and a non-target area according to the touch position, wherein the target fingerprint identification area is a fingerprint identification area where the touch position is located, the target area is an area where at least one part of fingerprint information exists in the target fingerprint identification area, and the non-target area is an area outside the target area in the target fingerprint identification area;
the control module controls the scanning driving module to scan the target fingerprint identification area according to the position information of the target fingerprint identification area determined by the processing module so as to perform fingerprint identification, and controls the scanning driving module to execute different scanning schemes on the target area and the non-target area according to the position information of the target area and the non-target area determined by the processing module, wherein the target area is scanned according to a first scanning scheme, the non-target area is scanned according to a second scanning scheme, and the scanning time of the first scanning scheme is longer than that of the second scanning scheme.
In a third aspect, embodiments of the present invention provide a display device, which includes the display panel according to the first aspect of the present invention.
According to the display panel, the fingerprint identification driving method and the display device, the touch position is detected, the target fingerprint identification area with the fingerprint information is determined according to the touch position, then the target fingerprint identification area is divided into the target area and the non-target area at least comprising part of the fingerprint information, and then the scanning driving module is controlled to scan the fingerprint identification unit in the target area for a time longer than that of the fingerprint identification unit in the non-target area, so that the fingerprint time in the target area is increased, the fingerprint information can be collected better for identification, the fingerprint identification effect is improved, and the user experience is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a circuit schematic of a fingerprint identification unit provided by an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a processing module of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a target area determination of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another structure of a display panel according to an embodiment of the present invention;
FIG. 7 is a timing diagram of a pulse width control signal for a display panel according to an exemplary embodiment of the present invention;
FIG. 8 is a flowchart illustrating a fingerprint recognition driving method according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the invention, and not to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In order to solve the problem of the prior art, embodiments of the present invention provide a display panel, a fingerprint identification driving method thereof, and a display device. First, a display panel according to an embodiment of the present invention is described with reference to fig. 1 to 7.
Referring to fig. 1 to 7, a display panel 100 according to an embodiment of the present invention includes a touch module 110, a plurality of fingerprint identification areas 120, a scan driving module 130, a processing module 140, and a control module 150.
The touch module 110 is used to detect a touch position of a touch subject on the display panel 100. The touch module 110 may include touch electrodes disposed on a substrate of the display panel 100 and a touch chip (touch IC) connected to the touch electrodes. When a finger presses the display panel 100, the touch voltage generates a detection signal, and the touch chip can determine a touch position of the touch object, such as coordinates of a driving touch position, according to the detection signal generated by the touch electrode. The touch module 110 may adopt various suitable structures in the art, and is not limited in detail herein. For example, it may employ mutual capacitance technology or self capacitance technology, or other suitable touch detection technology.
In the embodiment of the present invention, the display panel 100 includes a plurality of fingerprint identification areas 120, and a plurality of fingerprint identification units 11 are disposed in each fingerprint identification area 120. As an example, as shown in fig. 1, a plurality of fingerprint identification areas 120 are arranged along a first direction Y, each fingerprint identification area 120 includes a plurality of identification cell groups 10 arranged along the first direction Y, each fingerprint identification cell group 10 includes a plurality of fingerprint identification cells 11 arranged along a second direction X, and the first direction Y and the second direction X intersect. It should be understood that although in the present embodiment the fingerprint identification unit 11 is partitioned in the first direction, in other embodiments the fingerprint identification unit 11 may also be partitioned in the second direction, which are all included in the scope of the embodiments of the present invention.
In the embodiment of the present invention, each fingerprint identification area 120 may perform fingerprint detection independently, that is, only one or more of the fingerprint identification areas 120 are controlled to perform fingerprint detection, which greatly shortens the fingerprint scanning time and cycle, and improves the fingerprint identification effect and user experience compared with the case where all the fingerprint identification areas 120 are detected. Also, for example, the fingerprint detection can be performed by a single fingerprint identification area 120, and the size of the fingerprint identification area 120 should be able to cover the size of the fingerprint of the touch subject. As an example, the number of fingerprint identification cell groups 10 of the fingerprint identification area 120 is 200 or more. As an example, the fingerprinting area 120 includes more than 200 lines of fingerprinting unit groups 10. The number of the fingerprint identification unit group that the fingerprint identification area includes is confirmed based on the big or small scope of general fingerprint, through set up reasonable fingerprint identification unit group's number alright gather fingerprint information through single fingerprint identification is regional and discern to need not to open other fingerprint identification areas, consequently can shorten fingerprint detection time greatly, improve fingerprint identification efficiency, increase user experience.
An exemplary circuit of the fingerprint identification unit is shown in fig. 2, which includes a fingerprint identification unit 11 including a photodiode D1, a storage capacitor C1, a first switching device T1, a second switching device T2, and a third switching device T3. The control end of the third switching device T3 is connected to the fingerprint scanning line 12, the first end is connected to the second end of the second switching device T2, and the second end is connected to the fingerprint signal line 13. In addition, a 4 th switching device T4 is further disposed between the output terminal Vout of the fingerprint signal line 13 and the ground terminal Vss, a first pole of the fourth switching device T4 is connected to the output terminal Vout of the fingerprint signal line 15, a second pole is connected to the ground terminal Vss, and a control terminal is connected to the control signal COL.
The fingerprint detection principle of the fingerprint identification unit is as follows: the scanning signal output by the scanning driving module 130 is transmitted to the corresponding fingerprint identification unit 11 via the scanning signal line 12. When the fingerprint identification unit 11 receives a scanning signal, the third switching device T3 is turned on under the action of the scanning signal, and light reflected by the touch main body passes through one plate of the storage capacitor C1 and irradiates the photodiode D1, so that the saturation reverse leakage current of the photodiode D1 is greatly increased, and a photocurrent is formed, and is converted into a voltage through the storage capacitor C1 and the second switching device T2, and is transmitted out through the fingerprint signal line 13. Because the ridge and the valley in the fingerprint are different to photodiode D1's distance for the reflected light that P photodiode D1 received and formed at the position department of ridge and the intensity of the reflected light that forms at the position department of valley are different, and consequently, the photocurrent size that photodiode D1 converted is also different, and then discerns the valley and the ridge of fingerprint according to the size of photocurrent.
The scan driving module 130 is electrically connected to the fingerprint identification unit 11 for generating a scan signal. As an example, the scan driving module 130 sequentially outputs scan signals (e.g., sequentially outputs scan signals S1 to S9), the scan signals are transmitted to the corresponding fingerprint identification units 11 via the scan signal lines 12, and then the fingerprint identification units 11 generate fingerprint detection signals and output the fingerprint detection signals through the fingerprint signal lines 13. In an embodiment of the present invention, the scan driver module 130 may implement scan control for a single fingerprint identification area 120, rather than scanning all of the fingerprint identification areas 120. The detailed structure of the scan driving module 130 will be described below, and will not be described herein.
The processing module 140 is configured to determine a target fingerprint identification area 10A according to the touch position, where the target fingerprint identification area 10A is a fingerprint identification area where the touch position is located.
After the touch module 110 determines the touch position of the touch subject, the touch module sends the position information (e.g., coordinates) of the touch position to the processing module 140, and the processing module 140 can determine which fingerprint identification area the touch position is located in according to the position information of the touch position and the position information (e.g., coordinates) of each fingerprint identification area 120, and take the fingerprint identification area as the target fingerprint identification area. For example, the ordinate of the touch position is 100-150, and the ordinate of the second fingerprint identification area is 80-200, then it can be determined that the touch position belongs to the second fingerprint identification area, i.e. the target fingerprint identification area is the second fingerprint identification area.
Further, since the size of each fingerprint identification area 120 is generally larger than the size of a fingerprint, not all areas of the fingerprint identification area 120 will generate a fingerprint detection signal, but a part of the areas will have fingerprint information and a part of the areas will not. In the embodiment of the invention, in order to further improve the fingerprint identification effect, the scanning time of the area with the fingerprint information in the target fingerprint identification area is further increased, and the scanning time of other areas in the target fingerprint identification area is shortened. Therefore, after determining the target fingerprint identification area 10A, the processing module 140 further divides the target fingerprint identification area into the target area 10B and the non-target area 10C according to the position information of the touch position. The target area 10B is an area in the target fingerprint identification area 10A where at least a part of fingerprint information exists, and the non-target area 10C is an area in the target fingerprint identification area 10A other than the target area 10B. It should be understood that the target area 10B may be an area where all fingerprint information exists, or may be a part of an area where fingerprint information exists. That is, in the present embodiment, the scanning time period may be increased for all the areas where the fingerprint information exists in the target fingerprint identification area 10A, or may be increased for only a part of the areas where the fingerprint information exists. In other words, if the number of fingerprint identification cell groups 10 corresponding to all areas where fingerprint information exists is N1, and the number of fingerprint identification cell groups 10 corresponding to a target area is N2, then N2 ≦ N1.
When the target area 10B includes the entire area where fingerprint information exists, the determination of the target area 10B and the non-target area 10C is similar to the determination of the aforementioned target fingerprint identification area. When the target area 10B does not include the entire area where the fingerprint information exists, the target area may be determined by selecting a partial area from the entire area where the fingerprint information exists.
As one example, as shown in fig. 3, the processing module 140 includes a first coordinate acquisition unit 1401, a second coordinate acquisition unit 1402, and a position determination unit 1430. The first coordinate obtaining unit 1410 is configured to obtain coordinates of the touch position from the touch module. The second coordinate acquiring unit 1420 is configured to acquire coordinates of each fingerprint identification area. The position determining unit 1430 is configured to determine the position information of the target fingerprint identification area and the position information of the target area 10B and the non-target area 10C according to the coordinates of the touch position and the coordinates of each fingerprint identification area 10A.
As one example, as shown in fig. 4, it is assumed that the display panel includes (a + 2) fingerprint recognition areas, and the ordinate of the highest and lowest positions of the touch position are H1 and H2, and the ordinate of the highest and lowest positions of the fingerprint recognition area (i.e., the target fingerprint recognition area) in which they are located are X and Y. In one example, the ordinate of the highest and lowest positions of the target region are X-H1 and Y-H2.
The control module 150 is configured to control the scan driving module 130 to scan the target fingerprint identification area 10A for fingerprint identification according to the position information of the target fingerprint identification area 10A determined by the processing module 140 and control the scan driving module 130 to perform different scanning schemes on the target area 10B and the non-target area 10C according to the position information of the target area 10B and the non-target area 10C determined by the processing module 140,
that is, in some embodiments of the present invention, the control module 150 controls the scan driving module 130 to perform fingerprint detection on the fingerprint identification area where the touch position is located, and not perform fingerprint detection on other fingerprint identification areas, so that compared with scanning all fingerprint identification areas, the scanning duration and period are greatly shortened, the fingerprint detection effect is improved, and the user experience is increased. And to further improve the fingerprint identification effect, the scanning time of the target area is increased.
As an example, the increase in the scanning duration of the target area 10B may be achieved by directly increasing the scanning duration of the target area by keeping the other area (e.g., the non-target area) as the original scanning duration. At this time, the scanning time of the entire area increases for the target fingerprint identification area.
As another example, the increase in the scan duration of the target area 10B may be achieved by keeping the overall scan duration of the target fingerprint identification area constant, while decreasing the scan duration assigned to the non-target area to increase the scan duration of the target area.
In the embodiment of the invention, the scanning duration of the target area in which at least part of fingerprint information exists in the target fingerprint identification area is increased, so that the fingerprint information is more accurately acquired, the fingerprint scanning effect is better, and the user experience is increased.
As to how the control module realizes the scanning of the target fingerprint identification area and the increase of the scanning time length of the target area, it will be described with reference to fig. 5, 6 and 7.
Fig. 5 is another schematic structural diagram of a display panel according to an embodiment of the present invention.
Referring to fig. 5, in the embodiment of the invention, the scan driving module 130 includes a plurality of scanning units 1310 corresponding to the plurality of fingerprint identification areas 120 one to one, each of the scanning units 1310 includes a plurality of output terminals, each of the output terminals is electrically connected to the fingerprint identification units 11 of one identification unit group 10 in the corresponding fingerprint identification area 120, and is configured to send a scan signal to the fingerprint identification units 11 of the identification unit group 10.
In an embodiment of the present invention, the control module 150 includes a selection driving unit 1510. The input terminal of the selection driving unit 1510 is electrically connected to the processing module 140, and the selection driving unit 1510 includes a plurality of output terminals, each of which is electrically connected to one of the scanning units 1310 for transmitting a scan start signal (i.e., an STV signal) to the scanning unit 1310. In this embodiment of the present invention, the selection driving unit 1310 is configured to determine location information of a target fingerprint identification area according to the processing module 140, output a scanning start signal to a scanning unit corresponding to the target fingerprint identification area, and drive the scanning unit 1310 to scan a fingerprint identification unit in the target fingerprint identification area; and other fingerprint identification areas are not scanned, so that compared with the scanning of all fingerprint identification areas, the scanning time in fingerprint identification can be greatly shortened, and the fingerprint identification efficiency is improved.
Fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Referring to fig. 6, in the embodiment of the invention, the scan unit 1310 includes a plurality of shift registers 1320 connected in sequence, the number of the shift registers 1320 is the same as the number of the fingerprint identification unit groups 10 in the fingerprint identification area 120, for example, one fingerprint identification area 120 includes 200 fingerprint identification unit groups, and each scan unit 1310 includes 200 shift registers 1320 connected in sequence.
The control module 150 includes a pulse width control unit 1520, and the pulse width control unit 1520 is electrically connected to the processing module 140 and the scanning unit 1310. The pulse width control unit 1520 is configured to output a pulse width control signal to the scanning unit 1310 corresponding to the target fingerprint identification area according to the position information of the target area and the non-target area determined by the processing module 140, so that a scanning duration of each identification unit group in the target area by the scanning unit 1310 is T1, and a scanning duration of each identification unit group in the non-target area is T2, where T1> T2. Therefore, the scanning time of the non-target area is shorter, the scanning time of the whole area can be shortened or more time is left for scanning the target area, the scanning time of the target area is shorter, so that the information acquisition time is more abundant, the fingerprint identification effect is improved, and the user experience is increased.
As described above, in the embodiment of the present invention, the increase in the scanning time period of the target area can increase the scanning time period of the target area by decreasing the scanning time period allocated to the non-target area while keeping the entire scanning time period of the target fingerprint identification area constant. The pulse width control unit 1520 is therefore further configured to determine T1, T1= (T0-T2 × M2)/M1, according to the scanning duration T0 of the target fingerprint identification area, the number M1 of identification cell groups in the target area, and the numbers M2 and T2 of the identification cell groups in the non-target area. On the premise of keeping the total scanning duration of the fingerprint identification area unchanged, the scanning duration of each fingerprint identification unit group in the target area is increased by rapidly skipping the non-target area, so that the collected fingerprint information is more detailed and more accurate, and the fingerprint identification effect and the user experience are increased. Where T2 is determined by the shortest scan duration achievable by the pulse width control unit 1520. As an example, T2 ≦ 3 μ s. T2 is as short as possible under the premise that the pulse width control unit 1520 can implement, so as to quickly skip the non-target area, thereby giving more scanning time to the target area to improve the fingerprint identification effect.
Of course, the scanning duration of each identification unit group in the target area is T1, which can also be realized by directly increasing, at this time, the scanning duration of the non-target area is not changed, and the total scanning duration of the fingerprint identification area is increased.
As shown IN fig. 6, each shift register 1320 includes a shift input terminal IN, a shift output terminal NEXT, a first clock signal terminal CK1, a second clock signal terminal CK2, a third clock signal terminal CK3, and an output terminal OUT. The shift input terminal IN of the first shift register unit 1310 is electrically connected to the selection driving unit 1510 via a frame start signal line (i.e., a scan start signal STV). IN two adjacent shift register units 1320, the shift output terminal NEXT of the previous shift register unit 1320 is connected to the shift input terminal IN of the NEXT shift register unit 11, and the output terminal OUT of each shift register unit 1320 is electrically connected to the plurality of fingerprint identification units 11 IN the corresponding identification unit group 10. The first clock signal terminals CK1 of the odd shift register units 1320 are electrically connected to the pulse width control unit 1520 through the first clock signal line CKV1, the second clock signal terminals CK2 are electrically connected to the pulse width control unit 1520 through the second clock signal line CKV2, the first clock signal terminals CK1 of the even shift register units 1320 are electrically connected to the pulse width control unit 1520 through the second clock signal line CKV2, and the second clock signal terminals CK2 are electrically connected to the pulse width control unit 1520 through the first clock signal line CKV 1. The third clock signal terminal CK3 (e.g., the RESET signal terminal RESET) of the plurality of shift register units 1310 is electrically connected to the pulse width control unit 1520 via the third clock signal line CKV 3.
Fig. 7 is a timing diagram of a pulse width control signal of the pulse width control unit according to an embodiment of the invention. As shown in fig. 7, the scanning duration of the target region can be increased and the scanning duration of the non-target region can be shortened by reasonably configuring the periods of the pulse signals corresponding to the target region and the non-target region. Taking fig. 7 as an example, the pulse width control signal has a period of the pulse signal corresponding to the target regions H2-H1 larger than the periods of the pulse signals corresponding to the non-target regions H1-X and Y-H2.
The embodiment of the invention also provides a fingerprint identification driving method which is applied to the display panel according to the embodiment of the invention.
Fig. 8 is a flowchart illustrating a fingerprint identification driving method according to an embodiment of the present invention.
Referring to fig. 8 in conjunction with fig. 1, a fingerprint identification driving method 800 includes:
in step S101, the touch module 110 detects a touch position of the touch subject on the display panel 100.
In step S102, the processing module 140 determines a target fingerprint identification area according to the touch position, and divides the target fingerprint identification area into a target area and a non-target area according to the touch position, where the target fingerprint identification area is a fingerprint identification area where the touch position is located, the target area is an area where at least a part of the fingerprint information exists in the target fingerprint identification area, and the non-target area is an area other than the target area in the target fingerprint identification area.
In step S103, the control module 150 controls the scan driving module 130 to scan the target fingerprint identification area for fingerprint identification according to the position information of the target fingerprint identification area determined by the processing module 140, and controls the scan driving module 130 to execute different scanning schemes on the target area and the non-target area according to the position information of the target area and the non-target area determined by the processing module 140, wherein the target area is scanned by a first scanning scheme, and the non-target area is scanned by a second scanning scheme, and the scanning time of the first scanning scheme is longer than the scanning time of the second scanning scheme.
As can be seen from fig. 1, 5 and 6, a plurality of fingerprint identification areas 120 are arranged along a first direction, each fingerprint identification area 120 includes a plurality of identification cell groups 10 arranged along the first direction, and each identification cell group 10 includes a plurality of fingerprint identification cells 11 arranged along a second direction. The scan driving module 130 includes a plurality of scan cells 1310 corresponding to the plurality of fingerprint identification areas one to one, and each scan cell 1310 includes a plurality of output terminals each electrically connected to the fingerprint identification cells 11 of one identification cell group 10 in the corresponding fingerprint identification area 120. The control module 150 includes a selection driving unit 1510 and a pulse width control unit 1520, an input terminal of the selection driving unit 1510 is electrically connected to the processing module 140, the selection driving unit 1510 includes a plurality of output terminals, each of the output terminals is electrically connected to one of the scanning units 1310 for transmitting a scan start signal STV to the scanning unit 1310, the pulse width control unit 1520 is electrically connected to the processing module 140 and the scanning unit 1310 for transmitting a pulse width control signal CKV to the scanning unit 1310,
correspondingly, step S103 specifically includes:
the selection driving unit 1510 outputs the scanning start signal STV to the scanning unit 1310 corresponding to the target fingerprint identification area according to the position information of the target fingerprint identification area determined by the processing module 140, and drives the scanning unit 1310 to scan the fingerprint identification unit 11 in the target fingerprint identification area;
the pulse width control unit 1520 outputs a pulse width control signal to the scanning unit 1310 corresponding to the target fingerprint identification area according to the position information of the target area and the non-target area, so that the scanning unit 1310 has a scanning time period T1 for each identification unit group 10 in the target area and a scanning time period T2 for each identification unit group 10 in the non-target area, where T1> T2. Therefore, the scanning time of the non-target area is shorter, the scanning time of the whole area can be shortened or more time is left for scanning the target area, the scanning time of the target area is shorter, so that the information acquisition time is more abundant, the fingerprint identification effect is improved, and the user experience is increased.
As an example, step S103 further includes: the pulse width control unit 1520 determines T1 according to the scanning duration T0 of the target fingerprint identification region, the number of the identification cell groups in the target region, the number of the identification cell groups in the non-target region, and T2. As an example, T2 ≦ 3 μ s. T2 is as short as possible under the premise that the pulse width control unit 1520 can implement, so as to quickly skip the non-target area, thereby giving more scanning time to the target area to improve the fingerprint identification effect.
According to the fingerprint identification driving method provided by the embodiment of the invention, the touch position is detected, the target fingerprint identification area with the fingerprint information is determined according to the touch position, then the target fingerprint identification area is divided into the target area and the non-target area at least comprising part of the fingerprint information, and then the scanning driving module is controlled to scan the fingerprint identification unit in the target area for a time longer than that of the fingerprint identification unit in the non-target area, so that the fingerprint time of the target area is increased, the fingerprint information can be better collected for identification, the fingerprint identification effect is improved, and the user experience is increased.
Embodiments of the present invention also provide a display device 900, which includes a display panel 901 according to an embodiment of the present invention, and which has similar advantages to the display panel of the embodiment of the present invention; the display device 900 may be a mobile phone, a display screen, etc., and particularly may be a vehicle-mounted large-sized display screen.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention.
Claims (8)
1. A display panel, comprising:
the touch control module is used for detecting the touch position of the touch main body on the display panel;
the fingerprint identification device comprises a plurality of fingerprint identification areas, a plurality of fingerprint identification units and a control unit, wherein each fingerprint identification area is internally provided with the fingerprint identification units;
the scanning driving module is electrically connected with the fingerprint identification unit and used for generating a scanning signal;
a processing module, configured to determine a target fingerprint identification area according to the touch position, and divide the target fingerprint identification area into a target area and a non-target area, where the target fingerprint identification area is a fingerprint identification area where the touch position is located, the target area is an area where at least a part of fingerprint information exists in the target fingerprint identification area, and the non-target area is an area other than the target area in the target fingerprint identification area;
the control module is used for controlling the scanning driving module to scan the target fingerprint identification area for fingerprint identification according to the position information of the target fingerprint identification area determined by the processing module and controlling the scanning driving module to execute different scanning schemes on the target area and the non-target area according to the position information of the target area and the non-target area determined by the processing module, wherein the target area is scanned by a first scanning scheme, the non-target area is scanned by a second scanning scheme, and the scanning time of the first scanning scheme is longer than that of the second scanning scheme;
the fingerprint identification areas are arranged along a first direction, each fingerprint identification area comprises a plurality of identification unit groups arranged along the first direction, each identification unit group comprises a plurality of fingerprint identification units arranged along a second direction, and the first direction and the second direction are intersected;
the scanning driving module comprises a plurality of scanning units which are in one-to-one correspondence with the plurality of fingerprint identification areas, each scanning unit comprises a plurality of output ends, and each output end is electrically connected with the fingerprint identification unit of one identification unit group in the corresponding fingerprint identification area;
the control module includes:
the input end of the selection driving unit is electrically connected with the processing module, the selection driving unit comprises a plurality of output ends, each output end is electrically connected with one scanning unit and used for sending a scanning starting signal to the scanning unit, and the selection driving unit is used for outputting the scanning starting signal to the scanning unit corresponding to the target fingerprint identification area according to the position information of the target fingerprint identification area and driving the scanning unit to scan the fingerprint identification unit in the target fingerprint identification area;
the pulse width control unit is electrically connected with the processing module and the scanning unit, and is used for outputting a pulse width control signal to the scanning unit corresponding to the target fingerprint identification area according to the position information of the target area and the non-target area, so that the scanning time of the scanning unit for each identification unit group in the target area is T1, the scanning time of the scanning unit for each identification unit group in the non-target area is T2, and T1> T2;
the number of the fingerprint identification units corresponding to the area with the fingerprint information is N1, the number of the fingerprint identification units corresponding to the target area is N2, and N2 is less than or equal to N1;
the processing module comprises:
a first coordinate obtaining unit, configured to obtain coordinates of the touch position from the touch module;
a second coordinate acquisition unit configured to acquire coordinates of each of the fingerprint identification areas;
a position determining unit, configured to determine position information of the target fingerprint identification area and position information of the target area and the non-target area according to the coordinates of the touch position and the coordinates of each fingerprint identification area;
the pulse width control unit is further configured to determine T1 according to a scanning duration T0 of the target fingerprint identification area, the number M1 of the identification unit groups in the target area, and the numbers M2 and T2 of the identification unit groups in the non-target area, where T1= (T0-T2 × M2)/M1.
2. The display panel of claim 1, wherein T2 ≦ 3 μ s.
3. The display panel according to claim 1, wherein the number of the fingerprint identification units of the fingerprint identification area is greater than or equal to 200.
4. A fingerprint recognition driving method applied to the display panel according to any one of claims 1 to 3, the fingerprint recognition driving method comprising:
the touch control module detects a touch position of a touch main body on the display panel;
the processing module determines a target fingerprint identification area according to the touch position, and divides the target fingerprint identification area into a target area and a non-target area according to the touch position, wherein the target fingerprint identification area is a fingerprint identification area where the touch position is located,
the target area is an area in which at least one part of fingerprint information exists in the target fingerprint identification area, and the non-target area is an area outside the target area in the target fingerprint identification area;
the control module controls the scanning driving module to scan the target fingerprint identification area according to the position information of the target fingerprint identification area determined by the processing module so as to perform fingerprint identification, and controls the scanning driving module to execute different scanning schemes on the target area and the non-target area according to the position information of the target area and the non-target area determined by the processing module, wherein the target area is scanned by a first scanning scheme, the non-target area is scanned by a second scanning scheme, and the scanning time of the first scanning scheme is longer than that of the second scanning scheme.
5. The fingerprint recognition driving method according to claim 4, wherein a plurality of the fingerprint recognition areas are arranged in a first direction, each of the fingerprint recognition areas includes a plurality of recognition unit groups arranged in the first direction, each of the recognition unit groups includes a plurality of the fingerprint recognition units arranged in a second direction, the scan driving module includes a plurality of scanning units in one-to-one correspondence with the plurality of fingerprint recognition areas, each of the scanning units includes a plurality of output terminals, each of the output terminals is electrically connected with the fingerprint recognition unit of one of the recognition unit groups in the corresponding fingerprint recognition area;
the control module comprises a selection drive unit and a pulse width control unit, the input end of the selection drive unit is electrically connected with the processing module, the selection drive unit comprises a plurality of output ends, each output end is electrically connected with one scanning unit and used for sending scanning starting signals to the scanning units, the pulse width control unit is electrically connected with the processing module and the scanning units and used for sending pulse width control signals to the scanning units,
the fingerprint identification driving method comprises the following steps:
the selection driving unit outputs the scanning starting signal to the scanning unit corresponding to the target fingerprint identification area according to the position information of the target fingerprint identification area determined by the processing module, and drives the scanning unit to scan the fingerprint identification unit in the target fingerprint identification area;
and the pulse width control unit outputs a pulse width control signal to the scanning unit corresponding to the target fingerprint identification area according to the position information of the target area and the non-target area, so that the scanning time of the scanning unit to each identification unit group in the target area is T1, the scanning time of each identification unit group in the non-target area is T2, and T1 is greater than T2.
6. The fingerprint recognition driving method according to claim 5, further comprising:
the pulse width control unit determines T1 according to the scanning time length T0 of the target fingerprint identification area, the number of the identification unit groups in the target area, the number of the identification unit groups in the non-target area and T2.
7. The fingerprint recognition driving method according to claim 5, wherein T2 ≦ 3 μ s.
8. A display device characterized by comprising the display panel according to any one of claims 1 to 3.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108564015A (en) * | 2018-03-30 | 2018-09-21 | 维沃移动通信有限公司 | A kind of fingerprint identification method and mobile terminal |
| CN109241940A (en) * | 2018-09-28 | 2019-01-18 | 上海天马微电子有限公司 | Display panel, fingerprint identification driving method thereof and display device |
| CN110008883A (en) * | 2019-03-28 | 2019-07-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110070000A (en) * | 2019-03-27 | 2019-07-30 | 武汉华星光电技术有限公司 | Fingerprint identification method and mobile terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108564015A (en) * | 2018-03-30 | 2018-09-21 | 维沃移动通信有限公司 | A kind of fingerprint identification method and mobile terminal |
| CN109241940A (en) * | 2018-09-28 | 2019-01-18 | 上海天马微电子有限公司 | Display panel, fingerprint identification driving method thereof and display device |
| CN110070000A (en) * | 2019-03-27 | 2019-07-30 | 武汉华星光电技术有限公司 | Fingerprint identification method and mobile terminal |
| CN110008883A (en) * | 2019-03-28 | 2019-07-12 | 厦门天马微电子有限公司 | Display panel and display device |
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