CN110782819B - Drive circuit, detection device, and method for driving detection device - Google Patents
Drive circuit, detection device, and method for driving detection device Download PDFInfo
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- CN110782819B CN110782819B CN201910988840.6A CN201910988840A CN110782819B CN 110782819 B CN110782819 B CN 110782819B CN 201910988840 A CN201910988840 A CN 201910988840A CN 110782819 B CN110782819 B CN 110782819B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
Abstract
The invention provides a driving circuit, which relates to the technical field of display and comprises: a driving module, configured to provide scanning signals to a plurality of rows of detection units in a detection area, so that the detection units generate detection signals; the detection area is divided into a plurality of detection subareas which are arranged along the column direction, and each detection subarea is provided with a plurality of rows of detection units; the control module is used for controlling the driving module to provide scanning signals for part of the detection units in each detection subarea in the initial scanning stage of each detection period, and judging the touch control position according to the detection signals of the detection units; in the complex scanning stage, the driving module is controlled to sequentially output scanning signals to each row of detection units in the detection subarea where the touch position is located. The invention also provides a detection device and a driving method of the detection device. The invention can reduce the scanning time in the detection process of fingerprint identification and the like.
Description
Technical Field
The invention relates to the technical field of display, in particular to a driving circuit, a detection device and a driving method of the detection device.
Background
Fingerprint recognition technology is one of biological feature recognition technology and is mature in the new century, and the technology enters the field of human production and living.
In the existing fingerprint detection device, a plurality of fingerprint detection devices arranged in an array are arranged in a fingerprint detection area, and the fingerprint detection devices can detect the area where the fingerprint detection devices are located. Each row of fingerprint detection devices is controlled by one shift register unit of the shift register, and each shift register unit is used for respectively sending scanning signals to the corresponding fingerprint detection module so as to scan the whole fingerprint detection area line by line, and sending detected information to the processing unit for analysis, so that fingerprint identification is realized.
However, the time required for scanning in the above manner is long, the fingerprint recognition speed is slow, and the efficiency is low.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides a driving circuit, a detection device and a driving method of the detection device.
In order to achieve the above object, the present invention provides a driving circuit, including:
a driving module, configured to provide scanning signals to a plurality of rows of detection units in a detection area, so that the detection units generate detection signals; the detection area is divided into a plurality of detection subareas which are arranged along the column direction, and each detection subarea is provided with a plurality of rows of detection units;
the control module is used for controlling the driving module to provide scanning signals for part of the detection units in each detection subarea in the initial scanning stage of each detection period, and judging the touch control position according to the detection signals of the detection units; in the complex scanning stage, the driving module is controlled to sequentially output scanning signals to each row of detection units in the detection subarea where the touch position is located.
Optionally, the driving module includes: the device comprises a plurality of groups of shift register units, wherein each group of shift register units comprises a plurality of shift register units in cascade connection, each group of shift register units comprises at least one first shift register unit and at least one second shift register unit, each shift register unit corresponds to one row of detection units in the detection area, and the shift register units are used for providing scanning signals for the detection units;
the control module includes: a gating unit and a control unit;
the output end of the last first shift register unit in each group is connected with the input end of the first shift register unit in the next group except the last group through the gating unit; the gating unit is used for: turning on the two first shift register units connected with the gating unit according to a gating signal, and turning off the two first shift register units connected with the gating unit according to a turn-off signal;
the control unit is used for providing the gating signals for the gating units in the initial scanning stage of each detection period, controlling the first shift register units to sequentially output scanning signals and controlling the second shift register units to stop outputting the scanning signals; and in the complex scanning stage of each detection period, providing the turn-off signal for the gating unit, judging the touch position according to the detection signal of the detection unit, and controlling a plurality of shift register units in a group of shift register units corresponding to the touch position to sequentially output scanning signals.
Optionally, the control unit includes:
the start control subunit is connected with the first shift register unit in each group and is used for providing a scanning start signal for the first shift register unit in the driving module in the initial scanning stage; in the complex scanning stage, a scanning start signal is provided for a first shift register unit in a group of shift register units corresponding to the touch position.
Optionally, the control unit further includes:
the first clock control subunit is connected with each first shift register unit, and is used for providing a first clock signal for the clock signal end of each first shift register unit in the initial scanning stage so that a plurality of first shift register units sequentially output scanning signals;
the second clock control subunit is connected with each shift register unit, and is used for providing a second clock signal for the clock signal end of each shift register unit in the corresponding group according to the touch position in the complex scanning stage so as to enable each shift register unit in the corresponding group to sequentially output scanning signals.
Optionally, each shift register unit includes a clock signal terminal;
in the initial scanning stage, the first clock control subunit supplies first clock signals to two adjacent first shift register units in opposite phases;
in the complex scanning stage, the second clock control subunit supplies the second clock signals to the adjacent two shift register units in opposite phases.
Optionally, the gate unit includes a gate transistor, a gate of the gate transistor is connected to the control unit, a first pole of the gate transistor is connected to an output terminal of the first shift register unit, and a second pole of the gate transistor is connected to an input terminal of a next first shift register unit.
Optionally, the first shift register unit of each group of shift register units is located before the second shift register unit.
Optionally, each group of shift register units includes one of the first shift register units and a plurality of the second shift register units.
On the other hand, the invention also provides a detection device, which comprises a detection substrate, wherein the detection substrate comprises a detection area, a plurality of rows of detection units are arranged in the detection area, and the detection device also comprises the driving circuit;
the detection unit is connected with the driving module, the driving module is used for providing scanning signals for the detection unit, and the detection unit is used for generating detection signals according to the scanning signals.
In another aspect, the present invention also provides a driving method of a detection device, where the detection device includes a detection substrate, the detection substrate includes a detection area, the detection area is divided into a plurality of detection sub-areas arranged along a column direction, and each detection sub-area is provided with a plurality of rows of detection units; the driving method includes:
in the initial scanning stage of each detection period, providing scanning signals for the detection units of partial rows in each detection subarea, and judging touch positions according to the detection signals of the detection units; in the complex scanning stage, scanning signals are sequentially output to each row of detection units in the detection subarea where the touch position is located.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a schematic diagram of a driving circuit according to an embodiment of the present invention;
FIG. 2 is a second schematic diagram of a driving circuit according to an embodiment of the present invention;
FIG. 3 is a third schematic diagram of a driving circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a detection unit according to an embodiment of the present invention;
fig. 5 is a flowchart of a driving method of a detection device according to an embodiment of the present invention.
Wherein, the reference numerals include:
1. a driving module; 11. a shift register unit; 11a, a first shift register unit; 11b, a second shift register unit; 2. a control module; 21. a gating unit; 22. a control unit; 22a, an initial control subunit; 22b, a first clock control subunit; 22c, a second clock control subunit; 41. a fingerprint detection device; 42. a switching device.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The embodiment of the invention provides a driving circuit which can be used in a fingerprint detection device. Fig. 1 is a schematic diagram of a driving circuit according to an embodiment of the present invention, as shown in fig. 1, the driving circuit includes: a drive module 1 and a control module 2.
The driving module 1 is used for providing scanning signals to a plurality of rows of detection units in the detection area so that the detection units generate detection signals. The detection area is divided into a plurality of detection subareas arranged along the column direction, and each detection subarea is provided with a plurality of rows of detection units. The control module 2 is used for controlling the driving module 1 to provide scanning signals for part of the row detection units in each detection subarea in the initial scanning stage of each detection period, and judging the touch control position according to the detection signals of the detection units; in the complex scanning stage, the control driving module 1 sequentially outputs scanning signals to each row of detection units in the detection subarea where the touch position is located.
Specifically, the driving module 1 may include a plurality of shift register units 11, each shift register unit 11 corresponds to a row of detection units, and the control module 2 may control an output scan signal of one of the shift register units 11 corresponding to each detection sub-area to perform initial scanning, so as to obtain a touch position; then, the control module 2 can make each shift register unit 11 corresponding to the detection subarea where the touch position is located output a scanning signal according to the touch position, so as to perform complex scanning, and obtain a final recognition result.
By adopting the driving circuit of the embodiment of the invention, in the initial scanning stage, the control module 2 enables the driving module 1 to output scanning signals to the detection units of part of the rows only, and identifies the touch position according to the detection signals of the detection units of part of the rows, and in the complex scanning stage, the control module 2 enables the driving module 1 to output scanning signals to the detection units in the detection subareas where the touch position is located according to the touch position. Compared with the prior art that scanning signals are sequentially sent to each row of detection units, the driving circuit provided by the embodiment of the invention can shorten the scanning time and is beneficial to realizing rapid detection.
Fig. 2 is a second schematic diagram of a driving circuit according to an embodiment of the present invention, as shown in fig. 1 and fig. 2, the driving module 1 includes: the shift register units 11 in each group include a plurality of cascaded shift register units 11, the shift register units 11 in each group include at least one first shift register unit 11a and at least one second shift register unit 11b, each shift register unit 11 corresponds to a row of detection units (not shown in the figure) in the detection area, and the shift register units 11 are configured to provide scanning signals to the detection units.
The control module 2 includes: a gating unit 21 and a control unit 22. The last first shift register cell 11a in each group is connected to the first shift register cell 11a of the next group except for the last group through the gate unit 21. The gating unit 21 is configured to: the two first shift register units 11a connected to the gating unit 21 are turned on according to a gating signal, and the two first shift register units 11a connected to the gating unit 21 are turned off according to a turn-off signal.
The cascade connection means that the output end of the nth shift register unit 11 is connected with the input end of the (n+1) th shift register unit 11, and the output end of the nth shift register unit 11 is connected with the reset end of the (n-1) th shift register unit 11. Where n is an integer greater than 1 and less than the total number of shift register units 11.
The control unit 22 is configured to supply a gate signal to the gate unit 21 at an initial scanning stage of each detection period, and control the plurality of first shift register units 11a to sequentially output a scan signal and control the second shift register unit 11b to stop outputting the scan signal. In the complex scanning stage, a turn-off signal is provided to the gating unit 21, and the touch position is determined according to the detection signal of the detection unit, so as to control a group of the plurality of shift register units 11 corresponding to the touch position to sequentially output scanning signals.
Specifically, as shown in fig. 1 and 2, a plurality of groups of shift register units 11 are sequentially arranged, and one group of shift register units 11 is taken as an example: the number of the first shift register units 11a and the number of the second shift register units 11b may be one or plural, and may be specifically determined according to actual needs. When the gate unit 21 is turned on, the output end of the last first shift register unit 11a is turned on with the input end of the next first shift register unit 11a in every two adjacent first shift register units 11a, and at this time, a scan start signal may be sent to the first shift register unit 11a, so that the plurality of first shift register units 11a sequentially output scan signals, and the input end of the second shift register unit 11b does not receive an effective signal, thereby stopping outputting the scan signals. When the strobe unit 21 is turned off, the two first shift register units 11a connected to the strobe unit 21 are also turned off, and the plurality of shift register units 11 are sequentially connected, so that after the scan start signal is sent to the first shift register unit 11, the plurality of shift register units 11 sequentially output the scan signal, that is, the first shift register unit 11a and the second shift register unit 11b each receive the valid signal in their respective input stages, so that the plurality of shift register units 11 sequentially output the scan signal. Note that, the first shift register unit 11a and the second shift register unit 11b do not indicate the sequence, and in the shift register units 11, the first shift register unit 11 may be the first shift register unit 11a or the second shift register unit 11b, which is not limited herein. Preferably, the first shift register unit 11 of each group of shift register units 11 is referred to as a first shift register unit 11a in the embodiment of the present application.
By adopting the driving circuit of the embodiment of the invention, the control unit 22 can be utilized to control the gating unit 21, so that the first shift register units 11a in the plurality of groups of shift register units 11 sequentially transmit scanning signals to the detection area to perform initial scanning, and then the touch control position is determined according to the detection signals of the detection units. Then, the control unit 22 may purposefully control each shift register unit 11 in a corresponding group (or groups) to sequentially output a scanning signal to the detection sub-area where the touch is generated according to the touch position, and perform a complex scan, so that the multiple rows of detection units in the corresponding detection sub-area perform a re-detection, thereby determining a final detection result (the final detection result may be a fingerprint image). Compared with the prior art that all shift register units 11 sequentially output scanning signals, the driving circuit of the embodiment of the invention can shorten the scanning time.
For a group of shift register units 11, the number of the first shift register units 11a and the number of the second shift register units 11b may be one or plural, and may be specifically determined according to actual needs. When the number of the first shift register units 11a and the number of the second shift register units 11b are plural, the connection manner of the plural shift register units may be: the first shift register unit 11a is in front, the second shift register unit 11b is in rear, and the last first shift register unit 11a is connected with the first shift register unit 11a of the next group through the gating unit 21; it may also be: the first shift register units 11a and the second shift register units 11b are staggered, and at this time, the first shift register units 11a may be connected by the strobe unit 21 in pairs, wherein the last first shift register unit 11a is connected to the first shift register unit 11a of the next group by the strobe unit 21.
Alternatively, in the embodiment of the present invention, each group of shift register units 11 includes one first shift register unit 11a and at least one second shift register unit 11b. And, the first shift register unit 11a of each group of shift register units 11 is located before the second shift register unit 11b. Specifically, the number of the second shift register units 11b in each group of shift register units 11 is plural.
Fig. 3 is a schematic diagram of a driving circuit according to a third embodiment of the present invention, and referring to fig. 2 and 3, in some embodiments, the gate unit 21 includes a gate transistor, a gate of the gate transistor is connected to the control unit 22, a first stage of the gate transistor is connected to an output terminal of the first shift register unit 11a, and a second stage of the gate transistor is connected to an input terminal of a next first shift register unit 11a. The gating transistor can be an N-type transistor or a P-type transistor, when the gating transistor is an N-type transistor, the gating signal is a high-level signal, and the turn-off signal is a low-level signal; when the gating transistor is a P-type transistor, the gating signal is a low level signal and the turn-off signal is a high level signal.
The control unit 22 includes: a start control subunit 22a, the start control subunit 22a is connected to the first shift register unit 11a in each group of shift register units, and the start control subunit 22a is configured to: the scan start signal STV is supplied to the first shift register unit 11a in the driving module in the initial scan stage. In the complex scanning phase, the scanning start signal STV is provided to the first shift register unit 11 in the corresponding group according to the touch position.
In some embodiments, the control unit 22 further comprises: a first clock control subunit 22b and a second clock control subunit 22c, the first clock control subunit 22b being connected to each of the first shift register units 11a, the first clock control subunit 22b being configured to: the first clock signal CLK is supplied to the clock signal terminal of each first shift register unit 11a in the initial scanning stage, so that the plurality of first shift register units 11a sequentially output the scanning signals. A second clock control subunit 22c is connected to each shift register unit 11, the second clock control subunit 22c being configured to: in the complex scanning stage, the second clock signal CLK' is provided to the clock signal terminal of each shift register unit 11 in the corresponding group according to the touch position, so that each shift register unit 11 in the corresponding group sequentially outputs the scanning signal.
It should be noted that, in the embodiment of the present invention, the first clock signal indicates a clock signal provided by each first shift register unit 11a in the initial scanning stage, but does not indicate that the clock signals received by each first shift register unit 11a are necessarily the same.
In some embodiments, each shift register cell 11 includes a clock signal terminal. In the initial scanning stage, the first clock control subunit 22b supplies the adjacent two first shift register units 11a with the first clock signals in opposite phases; in the complex scanning phase, the second clock control subunit 22c supplies the second clock signals to the adjacent two shift register units in opposite phases. The first clock control subunit 22b and the second clock control subunit 22c may each have two output terminals, specifically, the first clock control subunit 22b and the second clock control subunit 22c each have a first output terminal and a second output terminal, the first output terminal and the second output terminal of the first clock control subunit 22b output clock signals with opposite phases, and the first output terminal and the second output terminal of the second clock control subunit 22c output clock signals with opposite phases. The opposite phase here means that one of the clock signals is at a high level and the other clock signal is at a low level. The clock signal terminals of the odd-numbered stage shift register units 11 are connected to the first output terminal of the first clock control subunit 22b and the first output terminal of the second clock control subunit 22c, and the clock signal terminals of the even-numbered stage shift register units are connected to the second output terminal of the first clock control subunit 22b and the second output terminal of the second clock control subunit 22 c.
In the initial scanning stage, the first clock control subunit 22b supplies the adjacent two first shift register units 11 with the first clock signals in opposite phases; in the complex scanning phase, the second clock control subunit 22c supplies the second clock signals to the adjacent two shift register units 11 in opposite phases.
The operation of each shift register unit 11 at least includes: an input stage, an output stage and a reset stage, wherein in the input stage, the input end of the shift register unit 11 receives an effective signal, so that a pull-up node of the shift register unit reaches an effective potential; in the output stage, the clock signal end receives an effective signal, and the output end of the shift register unit 11 is conducted with the clock signal end under the control of the effective potential of the pull-up node, so that a scanning signal at the effective potential is output; in the reset phase, the reset terminal of the shift register unit 11 receives the valid signal, thereby making the output terminal conductive to the invalid signal terminal, and thereby outputting the invalid signal.
Of course, the number of clock signal terminals of each shift register unit 11 may be other numbers, for example, two; at this time, the first clock control subunit 22b and the second clock control subunit 22c have other numbers of outputs.
The driving process of the driving circuit will be described by taking one detection period as an example, wherein each group of shift register units 11 corresponds to one detection sub-area in the detection areas, and one shift register unit in each group of shift register units 11 corresponds to one row of detection units in the detection sub-area. In the initial scanning stage, the control unit 22 sends strobe signals to the plurality of strobe units 21 through the control terminal EN to turn on the plurality of first shift register units 11a two by two. The start control subunit 22a sends the scanning start signal STV to the first shift register unit 11a in the driving circuit, the first clock control subunit 22b outputs the first clock signal CLK, and the timing of the first clock signal output by the first clock control subunit 22b satisfies: the signal received by each first shift register unit 11a at the respective output stage is at an effective potential. The first shift register unit 11a receives the scan start signal STV, and then turns on the output terminal and the clock signal terminal in the output stage, thereby outputting a scan signal to a corresponding one of the first detection sub-regions, and outputs the scan signal to the next first shift register unit 11a, and the next first shift register unit 11a, after receiving the scan signal, turns on the output terminal and the clock signal terminal in the output stage, thereby outputting the scan signal to a corresponding one of the second detection sub-regions, and so on, the plurality of first shift register units 11a sequentially output the scan signal to enable a corresponding one of the first shift register units 11a in each of the detection sub-regions to generate a detection signal.
After receiving the detection signal, the control unit 22 determines the touch position according to the detection signal, and at this time, the control unit 22 enters a complex scanning stage. The control unit 22 outputs a turn-off signal to the gating unit 21 through the control terminal EN, and turns off the gating unit 21. The start control subunit 22a outputs a start scan signal to the first shift register unit 11 in the group of shift register units 11 corresponding to the detection sub-area where the touch position is located, and at the same time, the second clock control subunit 22c outputs the second clock signal CLK', and the first clock control subunit 22b stops outputting the first clock signal CLK. For a group of shift register units 11, after receiving a scan start signal, the first shift register unit 11 in the group turns on an output end and a clock signal end in an output stage of the shift register unit 11, so as to output a scan signal to a row of detection units corresponding to the group of shift register units 11, meanwhile, the next shift register unit 11 turns on an output end and a clock signal end after receiving the scan signal, so as to output the scan signal to the next row of detection units, and so on, the plurality of shift register units 11 in the group sequentially output the scan signal, so that each row of detection units in the corresponding detection subareas generates a detection signal, and fingerprint identification can be performed according to the detection signal generated by the detection units in the complex scanning stage.
It should be noted that, the touch position may be located at the boundary between two adjacent detection sub-areas, and at this time, the plurality of shift register units 11 in the two groups corresponding to the two detection sub-areas may be controlled to sequentially output scanning signals, so as to sequentially scan the plurality of rows of detection units in the two detection sub-areas.
Based on the same inventive concept, the embodiment of the invention further provides a detection device, wherein the detection device comprises a detection substrate, the detection substrate comprises a detection area, a plurality of rows of detection units are arranged in the detection area, and the detection device further comprises the driving circuit. The detection unit is connected with the driving module and the control module, the driving module is used for providing scanning signals for the detection unit, and the detection unit is used for generating detection signals according to the scanning signals.
Fig. 4 is a schematic structural diagram of a detection unit provided in the embodiment of the present invention, and as shown in fig. 4, the detection device in the embodiment of the present invention is particularly suitable for a fingerprint detection device, where the detection unit may include a fingerprint detection device 41 and a switching device 42 for detecting a fingerprint, and specifically, the fingerprint detection device 41 may be a PIN photodiode or a piezoelectric sensor. Of course, the detection device may also be used for detecting other information, and in this case, the detection unit may be a device for detecting other information. Specifically, the switching device 42 may be a switching transistor, where a first pole of the switching transistor is connected to the control module, a second pole of the switching transistor is connected to the fingerprint detection device 41, and a gate of the switching transistor is connected to the driving module through a gate line, and the switching transistors in the same row are connected to the same gate line. When the switching device 42 receives the scanning signal, the fingerprint detection device 41 and the control module are turned on, and the detection signal detected by the fingerprint detection device 41 is transmitted to the control module. The control module is used for judging the touch position according to the detection signal and controlling the driving module to send a scanning signal to the corresponding detection unit.
Based on the same inventive concept, the embodiment of the invention further provides a driving method of a detection device, wherein the detection device comprises a detection substrate, the detection substrate comprises a detection area, the detection area is divided into a plurality of detection subareas arranged along a column direction, and each detection subarea is provided with a plurality of rows of detection units. Fig. 5 is a flowchart of a driving method of a detection device according to an embodiment of the present invention, where, as shown in fig. 5, the driving method of the embodiment of the present invention includes:
s1, in the initial scanning stage of each detection period, scanning signals are provided for part of the row detection units in each detection subarea, and the touch control positions are judged according to the detection signals of the detection units.
S2, in the complex scanning stage, scanning signals are sequentially output to each row of detection units in the detection subarea where the touch position is located.
By adopting the driving method of the detection device, in the initial scanning stage, scanning signals are output to the detection units of part of the rows only, touch positions are identified according to the detection signals of the detection units of part of the rows, and in the complex scanning stage, the scanning signals are output to the detection units in the detection subareas corresponding to the touch positions according to the touch positions. Compared with the prior art that scanning signals are sequentially sent to each row of detection units, the driving circuit of the embodiment of the invention greatly shortens the scanning time and is beneficial to realizing rapid detection.
Steps S1 and S2 may be specifically performed by using the driving device described above, and specific principles are described above and will not be repeated here.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (9)
1. A driving circuit, characterized by comprising:
a driving module, configured to provide scanning signals to a plurality of rows of detection units in a detection area, so that the detection units generate detection signals; the detection area is divided into a plurality of detection subareas which are arranged along the column direction, and each detection subarea is provided with a plurality of rows of detection units;
the control module is used for controlling the driving module to provide scanning signals for part of the detection units in each detection subarea in the initial scanning stage of each detection period, and judging the touch control position according to the detection signals of the detection units; in the complex scanning stage, the driving module is controlled to sequentially output scanning signals to each row of detection units in the detection subarea where the touch position is located;
the driving module includes: the device comprises a plurality of groups of shift register units, wherein each group of shift register units comprises a plurality of shift register units in cascade connection, each group of shift register units comprises at least one first shift register unit and at least one second shift register unit, each shift register unit corresponds to one row of detection units in the detection area, and the shift register units are used for providing scanning signals for the detection units;
the control module includes: a gating unit and a control unit;
the output end of the last first shift register unit in each group is connected with the input end of the first shift register unit in the next group except the last group through the gating unit; the gating unit is used for: turning on the two first shift register units connected with the gating unit according to a gating signal, and turning off the two first shift register units connected with the gating unit according to a turn-off signal;
the control unit is used for providing the gating signals for the gating units in the initial scanning stage of each detection period, controlling the first shift register units to sequentially output scanning signals and controlling the second shift register units to stop outputting the scanning signals; and in the complex scanning stage of each detection period, providing the turn-off signal for the gating unit, judging the touch position according to the detection signal of the detection unit, and controlling a plurality of shift register units in a group of shift register units corresponding to the touch position to sequentially output scanning signals.
2. The drive circuit according to claim 1, wherein the control unit includes:
the start control subunit is connected with the first shift register unit in each group and is used for providing a scanning start signal for the first shift register unit in the driving module in the initial scanning stage; in the complex scanning stage, a scanning start signal is provided for a first shift register unit in a group of shift register units corresponding to the touch position.
3. The drive circuit according to claim 1, wherein the control unit further includes:
the first clock control subunit is connected with each first shift register unit, and is used for providing a first clock signal for the clock signal end of each first shift register unit in the initial scanning stage so that a plurality of first shift register units sequentially output scanning signals;
the second clock control subunit is connected with each shift register unit, and is used for providing a second clock signal for the clock signal end of each shift register unit in the corresponding group according to the touch position in the complex scanning stage so as to enable each shift register unit in the corresponding group to sequentially output scanning signals.
4. A driving circuit according to claim 3, wherein each of said shift register cells comprises a clock signal terminal;
in the initial scanning stage, the first clock control subunit supplies first clock signals to two adjacent first shift register units in opposite phases;
in the complex scanning stage, the second clock control subunit supplies the second clock signals to the adjacent two shift register units in opposite phases.
5. The driving circuit according to any one of claims 1 to 4, wherein the gate unit includes a gate transistor, a gate of the gate transistor is connected to the control unit, a first pole of the gate transistor is connected to an output terminal of the first shift register unit, and a second pole of the gate transistor is connected to an input terminal of a next first shift register unit.
6. The drive circuit according to any one of claims 1 to 4, wherein the first shift register unit in each group of the shift register units is located before the second shift register unit.
7. The driving circuit according to any one of claims 1 to 4, wherein each group of the shift register units includes one of the first shift register units and a plurality of the second shift register units.
8. A detection device comprising a detection substrate comprising a detection zone in which a plurality of rows of detection units are disposed, the detection device further comprising the drive circuit of any one of claims 1 to 7;
the detection unit is connected with the driving module, the driving module is used for providing scanning signals for the detection unit, and the detection unit is used for generating detection signals according to the scanning signals.
9. A driving method of a detection device, characterized in that the detection device comprises a detection substrate, the detection substrate comprises a detection area, the detection area is divided into a plurality of detection subareas arranged along a column direction, and each detection subarea is provided with a plurality of rows of detection units; the driving method includes:
in the initial scanning stage of each detection period, providing scanning signals for the detection units of partial rows in each detection subarea, and judging touch positions according to the detection signals of the detection units; in the complex scanning stage, scanning signals are sequentially output to each row of detection units in the detection subarea where the touch position is located.
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