CN113485573A - Display panel, touch positioning method thereof and display device - Google Patents
Display panel, touch positioning method thereof and display device Download PDFInfo
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- 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
Abstract
The invention discloses a display panel, a touch positioning method thereof and a display device, belonging to the technical field of display, wherein the display panel comprises a display area and a frame area comprising an FPR processing module and an FPR driving circuit; the display area comprises a plurality of scanning subareas which are arranged along a first direction, and a plurality of power lines which are arranged along a second direction and extend along the first direction are arranged in the display area; each scanning partition is divided into m touch detection areas by a plurality of power lines; each power line corresponds to n touch detection areas. The method comprises the following steps: the FPR driving circuit sequentially sends a starting signal to each scanning subarea so as to control a touch detection area in each scanning subarea to perform touch scanning according to the starting signal; each power line acquires a touch detection signal corresponding to the touch detection area, so that the FPR processing module positions a touch position according to all the touch detection signals. The invention can solve the problem that the prior display panel applying the FPR technology has low aperture ratio and penetration rate.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display panel, a touch positioning method thereof and a display device.
Background
With the development of display technology, the multifunctional display panel is gradually paid attention by terminal vendors. Of particular significance are panel devices that employ FPR (Fingerprint Recognition) technology. In the device using the FPR technology, the fingerprint identification FPR circuit, the Touch circuit, and the Display circuit are usually integrated in the panel at the same time, which results in dense lines in the non-Display area of the panel, and thus the aperture ratio and the transmittance of the panel are low.
Disclosure of Invention
The embodiment of the invention provides a display panel, a touch positioning method thereof and a display device, which can solve the problem that the existing display panel applying an FPR technology is low in aperture ratio and penetration rate.
In a first aspect, a touch positioning method for a display panel is provided, where the display panel includes a display area and a frame area, the frame area is located at the periphery of the display area, and the frame area includes a fingerprint identification FPR processing module and an FPR driving circuit; the display area comprises a plurality of scanning subareas, and the scanning subareas are arranged along a first direction; a plurality of power lines are arranged in the display area, are arranged along a second direction and extend along the first direction, and the second direction is intersected with the first direction; each scanning partition is divided into m touch detection areas by a plurality of power lines; each power line corresponds to n touch detection areas along the first direction, wherein n is the number of scanning subareas; the method comprises the following steps:
the FPR driving circuit sequentially sends a starting signal to each scanning subarea so as to control the touch detection area in each scanning subarea to perform touch scanning according to the starting signal;
each power line acquires a touch detection signal corresponding to the touch detection area and sends the touch detection signal to the FPR processing module;
and the FPR processing module receives all the touch detection signals and positions touch positions according to all the touch detection signals.
In a second aspect, the present application further provides a display panel, where the display panel executes the touch positioning method of the display panel of the first aspect.
In a third aspect, the present application also provides a display device comprising the display panel of the second aspect.
Compared with the prior art, the display panel, the touch positioning method thereof and the display device provided by the embodiment of the application at least realize the following beneficial effects:
according to the display panel, the touch positioning method and the display device, the touch position is positioned through the touch detection signal obtained by the FPR processing module, wherein the touch detection signal is obtained by performing touch scanning on the scanning subarea, and the touch scanning on the scanning subarea is triggered to be started by sending the starting signal by the FPR driving circuit. Therefore, the FPR driving circuit and the FPR processing module are used in the display panel, the function of triggering scanning partitions to perform Touch positioning is achieved, Touch circuits do not need to be arranged during panel integration, the complexity of a peripheral area circuit is reduced, the problem that the existing display panel using the FPR technology is low in aperture ratio and penetration rate is solved, and the aperture ratio and the penetration rate of the panel are improved. The capacitive coupling of the FPR driving circuit and the Touch circuit is avoided, and the performance of the equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a substrate arrangement structure of a conventional display panel.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present application.
Fig. 3 is a flowchart illustrating a touch positioning method of the display panel shown in fig. 2.
Fig. 4 is a schematic diagram of a substrate arrangement structure of a display panel according to a touch positioning method of the display panel in the embodiment of the invention.
Fig. 5 is a flowchart illustrating a detailed process of positioning a touch position according to all touch detection signals by the FPR processing module in the touch positioning method for a display panel according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a touch scan curve generated by the FPR processing module after the finger touches the display panel according to the embodiment of the present invention.
Fig. 7 is a signal timing diagram related to a touch positioning method of a display panel according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention.
Fig. 9 is a flowchart illustrating a touch positioning method performed by the display panel shown in fig. 8.
In the drawings:
the display device comprises a display area 10, a frame area 20, an FPR processing module 21, an FPR driving circuit 22, a scanning partition 11, a first scanning line 30, a first signal transmitting end S1, a starting signal transmitting end S2, a power line Source, a starting signal STV, a reset signal GRESET, a clock signal CLK and a touch detection signal Gout.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It is to be understood that the terms "upper", "lower", "left", "right", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of this patent. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise. Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In order to explain the technical solution of the present application, the following detailed description is made with reference to the specific drawings and examples.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a substrate arrangement structure of a conventional display panel. The array substrate is provided with a fingerprint identification FPR circuit, a Touch circuit and a Display circuit, and the integration mode of the multiple circuits enables the circuits of the non-Display area of the Display panel to be dense, so that the Display panel provided by the prior art is low in aperture ratio and penetration rate.
In order to solve the above problem, embodiments of the present application provide a touch positioning method for a display panel, a display panel and a display device.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic view illustrating an alternative structure of a display panel according to an embodiment of the present disclosure. Fig. 3 is a schematic flow structure diagram of the touch positioning method for the display panel shown in fig. 2.
It should be noted that, in the structural schematic diagrams of the display panels according to all embodiments of the present application, the direction Y is a first direction, and may represent an arrangement direction of the plurality of scanning sub-areas 11 and an extending direction of the power line Source; the direction X is the second direction and may represent the arrangement direction of the power line Source.
The display panel in the embodiment of the present application includes a display area 10 and a frame area 20. The frame region 20 is located at the periphery of the display region 10 and may belong to a non-display region. The frame area 20 includes an FPR processing module 21 and an FPR driving circuit 22. The FPR processing module 21 may refer to a fingerprint recognition processing IC.
It should be noted that the FPR processing module 21 may also be other devices, as long as the function of positioning the touch position required by the embodiment of the present application can be realized on the premise of implementing the fingerprint identification processing function. In the present embodiment, the FPR processing module 21, which takes the fingerprint identification processing IC as an example, not only realizes the original fingerprint identification function, but also multiplexes in touch positioning, and touch positioning and fingerprint identification are not realized at the same time.
The FPR driving circuit 22 may include a shift register, and the FPR driving circuit 22 is configured to emit an STV (Start Vertical). In an alternative example, the FPR driving circuit 22 may be disposed near an edge of the display area 10, where the display area 10 intersects the frame area 20 along the second direction. The FPR driving circuit 22 is disposed close to the touch panel, so as to rapidly send out the start signal, and the scanning sub-area 11 starts the touch scanning.
The display area 10 includes a plurality of scanning sections 11, and the plurality of scanning sections 11 are arranged in a first direction. In an alternative example, since there are a plurality of scanning sections 11, there may be a plurality of FPR driving circuits 22, and each FPR driving circuit 22 sends a start signal to one scanning section 11, thereby improving the accuracy of signal control.
The size of the scanning partition 11 can be determined according to the touch positioning accuracy, and the size of the scanning partition 11 can be obtained according to the positioning accuracy and the size of the display panel. Assuming that the size of the display panel is 6.6 inches, the length in the Y direction is 160 mm, and the positioning accuracy is 4 mm/block, the number of the scanning sections 11 is 160 mm/4-40. It can be understood that, on the premise that the size of the display panel is not changed, the larger the number n of the scanning sub-areas 11 is, the higher the touch positioning accuracy is.
It should be noted that the start signal is a scan start signal, and in this embodiment, the start signal is used to trigger the start of the scan partition 11, which represents the start of touch location of one scan partition 11.
A plurality of power line sources are arranged in the display area 10, arranged along the second direction, and extending along the first direction, and the first direction is intersected with the second direction. Optionally, the first direction and the second direction are perpendicular to each other in a direction perpendicular to an orthographic projection direction of the display panel. The power line Source can provide a constant current Source, and the received touch detection signal is a voltage signal.
Each power line Source passes through each scan section 11 while extending in the first direction. Each scanning partition 11 is divided into m touch detection areas by a plurality of power line sources. Each power line Source corresponds to n touch detection areas along the first direction. Therefore, all the scanning sub-areas 11 of the whole display area 10 are divided by the power line Source to form m times n touch detection areas, each touch detection area belongs to one scanning sub-area 11, and each touch detection area corresponds to one power line Source. Where n is the number of scan segments 11 and m may be the total number of Source lines plus 1.
Each power line Source is provided with a power line pin in a corresponding touch detection area, and receives a touch detection signal corresponding to the touch detection area through the power line pin. The positions corresponding to all touch detection signals can be determined through power line pins of all power line sources.
Based on the structure, the touch positioning method of the display panel comprises the following steps:
step S310, the FPR driving circuit sequentially sends a starting signal to each scanning subarea so as to control a touch detection area in each scanning subarea to perform touch scanning according to the starting signal;
step S320, each power line acquires a touch detection signal corresponding to the touch detection area, and sends the touch detection signal to the FPR processing module;
in step S330, the FPR processing module receives all the touch detection signals and locates the touch position according to all the touch detection signals.
When the FPR driving circuit 22 sequentially transmits the start signal, the scanning sub-areas 11 sequentially arranged along the first direction may be sequentially turned on, and all the scanning sub-areas 11 sequentially complete the touch scanning. Each power line Source can acquire the touch detection signal of the power line Source corresponding to the touch detection area through the Source Pin. The power line Source may send the received touch detection signal to the FPR processing module 21, and the FPR processing module 21 locates the touch position according to the magnitude of all the touch detection signals.
In the embodiment of the present application, the touch position is located by the touch detection signal obtained by the FPR processing module 21, wherein the touch detection signal is obtained by performing touch scanning on the scanning partition 11, and the scanning on the scanning partition 11 is triggered to be turned on by sending the start signal by the FPR driving circuit 22. Therefore, the FPR driving circuit 22 and the FPR processing module 21 are used in the display panel, so as to implement the function of triggering the scanning partition 11 to perform Touch positioning, and the Touch circuit is not required to be arranged during panel integration.
Please refer to fig. 1 and fig. 4, which are schematic diagrams of the substrate layout structure with the Touch circuit in the prior art and the Touch circuit omitted in the present application, respectively. Compared with the prior art, a Touch circuit is omitted from the array substrate of the display panel, the complexity of a circuit in a peripheral frame area is reduced, the problems of low aperture ratio and low penetration ratio of the existing display panel applying the FPR technology are solved, and the aperture ratio and the penetration ratio of the panel are improved. Because the Touch positioning is carried out through the multiplexing of the FPR driving circuit and the FPR processing module, a Touch circuit is not required to be arranged, the capacitive coupling of the FPR circuit and the Touch circuit is avoided, and the equipment performance is improved.
Referring to fig. 2, fig. 3 and fig. 5 together, fig. 5 is a detailed flowchart illustrating a step of positioning a touch position according to all touch detection signals by the FPR processing module in the touch positioning method for a display panel according to an embodiment of the present application. The method comprises the following steps:
step S531, the FPR processing module finds out the touch detection signal with the minimum signal quantity from all the touch detection signals, wherein the touch detection signal with the minimum signal quantity is the weakest signal;
in step S532, the FPR processing module determines the touch detection area corresponding to the weakest signal as the touch position.
On one hand, when the user touches the display panel with a finger, the reflectivity of the finger touch area is lower than that of the non-touch pressing area, so that the touch position can be located according to the strength of the received touch detection signal. On the other hand, in addition to the additional touch positioning function, the storage space capacity of the FPR processing module 21 can also meet the requirement of touch positioning.
Specifically, the amount of data that can be stored in the storage space of the FPR processing module 21 is 256 × 256 — 65536. Still taking 40 scanning partitions as an example, assuming that the number of the power lines of the display panel is 1080, the data amount required for each time of completing scanning is 40 × 1080 ═ 43200, and the data amount 43200 is much smaller than the storage space of the FPR processing module 21, which can store 65536, so that the storage space of the FPR processing module 21 also meets the storage requirement of the touch detection signal required for a single scanning besides the functions.
In an optional example, in order to obtain the weakest signal intuitively and quickly, the process of searching the weakest signal from all the touch detection signals by the FPR processing module 21 may be to first obtain the serial number of the scan partition 11 to which the touch detection area corresponding to each touch detection signal belongs. And then, generating a touch scanning curve corresponding to each power line Source by taking the touch detection signal as a first coordinate axis parameter and taking the serial number of the scanning partition 11 as a second coordinate axis parameter. Finally, the FPR processing module 21 detects the lowest point of all the touch scan curves, and the touch detection signal corresponding to the lowest point is the touch detection signal with the smallest signal quantity, i.e. the weakest signal.
Specifically, the touch detection signals obtained and sent by the power line Source are generally sent along the arrangement sequence of the scanning partition 11, and the arrangement sequence of the scanning partition 11 is also the serial number of the scanning partition 11, so that the FPR processing module 21 can use the serial number of the scanning partition 11 as the receiving sequence of each touch detection signal and the arrangement basis of the touch scanning curve. The weakest signal can be obtained more quickly and directly by scanning the partition serial numbers and generating a touch scanning curve through the touch detection signal.
It should be noted that the FPR processing module 21 may not generate the touch scan curve, as long as the search for the weakest signal can be achieved. For example, the search may be performed according to an output timing chart of the touch detection signal, or a mapping relationship may be formed among different power line sources, the magnitude of the touch detection signal, and the receiving time, all the touch detection signals are traversed to find the weakest signal, and then according to the mapping, the receiving time of the weakest signal and the power line where the weakest signal is located are found, and finally the touch detection area corresponding to the weakest signal is located.
Referring to fig. 6, fig. 6 is a touch scanning curve formed by the FPR processing module according to the touch detection signal received by a power line after the finger touches the display panel. The first coordinate axis parameter is a vertical coordinate, and the second coordinate axis parameter is a horizontal coordinate. As can be seen from fig. 6, the touch detection signal with the smallest signal quantity among the 40 touch detection signals received by the power line is located in the sixth scanning sub-area, so that the touch position of the FPR processing module along the first direction is located in the sixth scanning sub-area. The touch detection area detected by the touch detection signal with the minimum signal quantity corresponding to the power line pin source pin is the touch position of the user.
It should be noted that, in the present application, the FPR processing module finally distinguishes the weakest signal from a plurality of touch detection signals through the voltage change caused by the touch position in the reflectivity of the display panel, so as to locate the touch position. Therefore, Touch positioning is realized by means of the FPR circuit, the problem that the display panel applying the FPR technology is low in aperture ratio and penetration rate is solved, the complexity of a peripheral area circuit is reduced, capacitive coupling between the FPR driving circuit and the Touch circuit is avoided, and the equipment performance is improved.
Please refer to fig. 2 and fig. 7 together, wherein fig. 7 is a signal timing diagram related to a touch positioning method of a display panel according to an embodiment of the present application. The FPR driving circuit 22 of fig. 2 includes two signal ports, which are shown in fig. 7 as a first signal transmitting terminal S1 and a start signal transmitting terminal S2, respectively, and the start signal transmitting terminal S2 is used for sequentially transmitting a start signal STV. The timing signal lines indicated by STV1 to STVN in fig. 7 correspond to the timings of the start signal STV received from the first scan segment to the first scan segment, respectively; the timing signal line indicated by the GRESET is the transmission timing of the reset signal GRESET, which is reset by pulling up the level.
Note that the start signal transmitting end S2 is dedicated to transmitting the start signal STV, and the first signal transmitting end S1 is used for other signal common transmission. The other signals include at least one of a clock signal CLK and a reset signal GRESET. The accuracy of the sending of the start signal can be improved by the special use of the sending end S2 of the start signal.
In an alternative example, in order to guarantee the accuracy of the scanning result of the scanning partition 11, after the corresponding scanning partition 11 is triggered by one start signal STV to complete the touch scanning, the first signal sending end S1 may be used to output a reset signal GRESET to the scanning partition 11. The reset signal GRESET may be sent to the scanning partition 11 that has just completed the touch scanning, or all the scanning partitions 11 may be sent.
The signal reset is substantially performed after any one of the scanning sub-areas 11 completes the touch scanning, which is equivalent to performing the signal reset at an interval when the FPR driving circuit 22 sends the start signal STV through the start signal sending terminal S2. Taking the example that all the scanning sections 11 receive the reset signal GRESET, specifically, the reset signal GRESET may be output to each scanning section 11 through the first signal transmitting terminal S1 at an interval of transmitting the start signal STV through the start signal transmitting terminal S2, so that each scanning section 11 performs signal reset. According to the embodiment of the application, the reset signal GRESET is output to the scanning subarea 11, so that the scanning subarea 11 is subjected to signal reset, the signal interference is reduced, and the accuracy of the touch scanning result output by the scanning subarea 11 is improved.
With continued reference to FIG. 7, the timing signal line indicated by CKV in FIG. 7 is the timing of the clock signal CLK, which is sent by the first signal sender S1. It can be appreciated that, since the first signal transmitting terminal S1 is common, the output time of the clock signal CLK and the reset signal GRESET do not coincide. The clock signal CLK is used to control the touch scanning duration, so that the touch scanning of the scanning sub-area 11 is shifted to the next scanning sub-area 11, and the consistency of the touch scanning time of each scanning sub-area is ensured by adding the clock signal CLK.
It should be noted that, considering that there is a delay when the start signal STV triggers the scan signal to start scanning, the rise time of the clock signal CLK is generally later than the rise time of the start signal STV, and the pull-down end time of the start signal STV is identical to the pull-down end time of the clock signal CLK.
In fig. 7, Gout (1) to Gout (n) are touch detection signals Gout of the scan partition 11 read by the power line Source, and touch positions can be located by comparing magnitudes of the Gout signals Gout, so that touch location of the display panel is realized.
Please refer to fig. 3, fig. 7, fig. 8, and fig. 9, wherein fig. 8 is a schematic diagram of an alternative structure of a display panel according to an embodiment of the present disclosure. Fig. 9 is a flowchart illustrating a touch positioning method performed by the display panel shown in fig. 8.
In the present embodiment, each of the scanning sections 11 includes a plurality of first scanning lines 30, and the plurality of first scanning lines 30 are arranged along the first direction. When each scanning partition 11 includes a plurality of first scanning lines 30, the touch positioning of the display panel includes the following steps:
step S910, the FPR driving circuit sequentially sends a start signal to each scanning partition, so as to sequentially start at least one first scanning line of each scanning partition through the sequentially sent start signal, so that the first scanning line performs touch scanning on the touch detection area in the corresponding scanning partition;
step S920, each power line acquires a touch detection signal corresponding to the touch detection area, and sends the touch detection signal to the FPR processing module;
in step S930, the FPR processing module receives all the touch detection signals and locates the touch position according to all the touch detection signals.
The step S910 mentioned above gives a touch scanning implementation manner in which a plurality of first scan lines 30 exist in the scan partition 11. The implementation processes of step S920 and step S930 correspond to those of step S120 and step S130, and are not described herein again.
The main difference between this embodiment and the foregoing embodiment is that the touch scan is started by at least one first scan line arranged sequentially along the first direction in each scan partition. The number of the first scanning lines of each scanning partition is as small as possible, so that the time length of touch positioning scanning can be reduced.
It should be noted that the number of the first scan lines 30 that are turned on corresponding to each scan division 11 may be the same or may not be the same. To reduce the scanning duration of touch location, in an alternative example, the FPR driving circuit 22 may sequentially turn on the first scan line 30 of each scan partition 11. The first scan lines 30 of each scan division 11 are uniformly arranged, and the distance between two adjacent first scan lines 30 is the same, so that the uniformity of the touch detection signal Gout during touch scanning can be ensured.
Therefore, according to the touch positioning method of the display panel of the embodiment of the invention, the first scanning line 30 of each scanning partition 11 is correspondingly turned on to perform touch scanning, so that the touch positioning scanning duration is reduced, an accurate touch position is provided, and the touch positioning efficiency is improved.
The method for touch positioning of the display panel according to the embodiment of the invention is described in detail above with reference to fig. 1 to 9. On this basis, this application embodiment also protects a display panel and display device, and this display device can be at least one of wearable equipment, camera, cell-phone, panel computer, display screen, TV set. The display device comprises a display panel, and the display panel realizes all the implementation modes of the touch positioning method of the display panel, so the display panel and the display device have all the beneficial effects of the touch positioning method of the display panel.
In the display panel and the display device provided by the embodiment of the invention, the touch position is located by the touch detection signal obtained by the FPR processing module, wherein the touch detection signal is obtained by performing touch scanning on the scanning sub-area, and the FPR driving circuit sends the start signal to trigger the start-up when the scanning sub-area performs touch scanning. Therefore, the FPR driving circuit and the FPR processing module are used in the display panel, the function of triggering the scanning partition to perform Touch positioning is realized, and a Touch circuit is not required to be arranged during panel integration.
It should be noted that, in this document, 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.
The principles and embodiments of the present application are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present application. While the foregoing is only an alternative embodiment of the present application, it should be noted that there are objectively unlimited specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations, or changes may be made without departing from the principle of the present application, and the technical features described above may be combined in a suitable manner, and these modifications, decorations, or changes may be combined in a suitable manner; such modifications, decorations, variations or combinations, or non-modifications which may or may not directly apply the inventive concept or solution to other applications, are to be considered within the scope of this application.
Claims (10)
1. The touch positioning method of the display panel is characterized in that the display panel comprises a display area and a frame area positioned on the periphery of the display area, wherein the frame area comprises a fingerprint identification (FPR) processing module and an FPR driving circuit; the display area comprises a plurality of scanning subareas arranged along a first direction, a plurality of power lines arranged along a second direction and extending along the first direction are arranged in the display area, and the second direction is intersected with the first direction; each scanning partition is divided into m touch detection areas by a plurality of power lines; each power line corresponds to n touch detection areas along the first direction, wherein n is the number of scanning subareas; the method comprises the following steps:
the FPR driving circuit sequentially sends a starting signal to each scanning subarea so as to control the touch detection area in each scanning subarea to perform touch scanning according to the starting signal;
each power line acquires a touch detection signal corresponding to the touch detection area and sends the touch detection signal to the FPR processing module;
and the FPR processing module receives all the touch detection signals and positions touch positions according to all the touch detection signals.
2. The touch positioning method of the display panel according to claim 1, wherein the positioning of the touch position by the FPR processing module according to all the touch detection signals comprises:
the FPR processing module searches out a touch detection signal with the minimum signal quantity from all the touch detection signals, wherein the touch detection signal with the minimum signal quantity is the weakest signal;
and the FPR processing module determines a touch detection area corresponding to the weakest signal as the touch position.
3. The touch positioning method of the display panel according to claim 2, wherein the FPR processing module finds the touch detection signal with the minimum semaphore from all the touch detection signals, and comprises:
the FPR processing module acquires a scanning partition serial number to which a touch detection area corresponding to each touch detection signal belongs;
the FPR processing module takes a touch detection signal as a first coordinate axis parameter and a scanning partition sequence number as a second coordinate axis parameter to generate a touch scanning curve corresponding to each power line;
the FPR processing module detects the lowest points of all the touch scanning curves, and the touch detection signal corresponding to the lowest point is the touch detection signal with the minimum semaphore.
4. The touch positioning method of the display panel according to claim 1, wherein the FPR driving circuit comprises: the device comprises a first signal sending end and a starting signal sending end for sequentially sending the starting signal; the method further comprises the following steps:
the FPR driving circuit outputs a reset signal to each scanning subarea through the first signal sending end at an interval of sending the starting signal through the starting signal sending end so as to enable each scanning subarea to carry out signal reset.
5. The touch positioning method of the display panel according to claim 4, further comprising:
the FPR driving circuit outputs a clock signal through the first signal sending end, the clock signal is used for controlling the touch scanning duration, and the clock signal is inconsistent with the output time of the reset signal.
6. The touch positioning method of the display panel according to claim 1, wherein each of the scanning sections includes a plurality of first scanning lines arranged along the first direction; the FPR drive circuit controls the touch detection area in each scanning subarea to perform touch scanning according to the starting signal, and the touch scanning method comprises the following steps:
the FPR driving circuit sequentially starts at least one first scanning line of each scanning subarea through the starting signals which are sequentially sent so that the first scanning lines can carry out touch scanning on the touch detection areas in the corresponding scanning subareas.
7. The touch positioning method of the display panel according to claim 6, wherein the FPR driving circuit sequentially turns on a first scan line of each scan segment.
8. The touch positioning method of the display panel according to claim 7, wherein all the first scanning lines are uniformly arranged.
9. A display panel, wherein the display panel performs the touch positioning method of the display panel according to any one of claims 1 to 8.
10. A display device characterized by comprising the display panel according to claim 9.
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