WO2021169707A1 - 纹理检测模组及其驱动方法、和显示装置 - Google Patents

纹理检测模组及其驱动方法、和显示装置 Download PDF

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Publication number
WO2021169707A1
WO2021169707A1 PCT/CN2021/073738 CN2021073738W WO2021169707A1 WO 2021169707 A1 WO2021169707 A1 WO 2021169707A1 CN 2021073738 W CN2021073738 W CN 2021073738W WO 2021169707 A1 WO2021169707 A1 WO 2021169707A1
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Prior art keywords
electrode
sub
transmitting
electrodes
emitter
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PCT/CN2021/073738
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English (en)
French (fr)
Inventor
丁小梁
王海生
刘英明
王鹏鹏
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京东方科技集团股份有限公司
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Priority to US17/598,796 priority Critical patent/US11568672B2/en
Publication of WO2021169707A1 publication Critical patent/WO2021169707A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • 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
    • G06V40/1347—Preprocessing; Feature extraction
    • G06V40/1359—Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a texture detection module and a driving method thereof, and a display device.
  • the reflected wave touches the texture (fingerprint or palmprint)
  • the vibration intensity of the reflected wave of different textures will be different. Therefore, By detecting the vibration intensity of the reflected wave, the position of the finger valley ridge can be determined, and then the effect of texture recognition can be realized.
  • a texture detection module including a transmitting electrode layer, a receiving electrode layer, and a piezoelectric film layer located between the transmitting electrode layer and the receiving electrode layer; the transmitting electrode layer Comprising a transmitting electrode, a first transmitting signal line and a second transmitting signal line, wherein the transmitting electrode includes a first transmitting sub-electrode and a second transmitting sub-electrode that are insulated from each other;
  • the plurality of first emitter electrodes are arranged in N rows and M columns, the first emitter electrodes located in the same row are all electrically connected to the same first emitting signal line, and the N and the M are both positive integers;
  • the plurality of second emitter electrodes are arranged in X rows and Y columns, the second emitter electrodes located in the same column are all electrically connected to the same second emitting signal line, and the X and the Y are both positive integers.
  • a row of second emitter electrodes is located between two adjacent rows of first emitter electrodes, and a column of second emitter electrodes is located between two adjacent columns of first emitter electrodes.
  • first emitter electrodes are arranged to surround one second emitter electrode.
  • first emitter electrodes located in the same column are not connected to each other, and the second emitter electrodes located in the same row are not connected to each other.
  • first transmitting signal line and the second transmitting signal line are arranged in different layers, and the transmitting electrode layer further includes an insulating layer located between the first transmitting signal line and the second transmitting signal line .
  • the first transmitting signal line includes a first part and a second part; the second transmitting signal line and the first part are arranged in the same layer and located between two adjacent first parts; the transmitting electrode layer is also
  • the insulating layer includes an insulating layer covering the first portion and the second transmitting signal line, the insulating layer is provided with a via hole, and the second portion connects two adjacent first portions through the via hole.
  • first emitter electrode and the second emitter electrode are both rhomboid or symmetrical hexagons.
  • first transmitter electrodes located in the same column are electrically connected to the same second transmitting signal line
  • second transmitter electrodes located in the same row are electrically connected to the same first transmitting signal line
  • the receiving electrode layer includes a plurality of receiving sub-electrodes, wherein the orthographic projection of each receiving sub-electrode on the piezoelectric film layer includes the orthographic projection of at least one target transmitter sub-electrode on the piezoelectric film layer.
  • the target emitter sub-electrode and the other emitter sub-electrodes belong to the first emitter sub-electrode or the second emitter sub-electrode
  • the other emitter sub-electrodes are the first emitter sub-electrode or the second emitter sub-electrode other than the target emitter sub-electrode.
  • each of the first transmitting sub-electrodes or each of the second transmitting sub-electrodes has a receiving sub-electrode arranged opposite to it; each of the receiving sub-electrodes transmits a voltage signal through a wiring .
  • each of the receiving sub-electrodes and a plurality of the target transmitting sub-electrodes are arranged directly opposite to each other.
  • first emitter electrodes located in the same row are all located on the same first straight line; the second emitter electrodes located in the same column are all located on the same second straight line.
  • first straight line is perpendicular to the second straight line.
  • the embodiments of the present disclosure also provide a display device including the texture detection module as described above.
  • the embodiments of the present disclosure also provide a method for controlling a texture detection module, which is applied to the above-mentioned texture detection module, and the method includes:
  • each first transmitting group includes at least Two rows of first emitter electrodes
  • each second firing group includes at least two rows of second firing sub-electrodes
  • the fingerprint information is determined based on the first voltage signal and the second voltage signal.
  • step of transmitting a sine wave signal for each first transmitting group includes:
  • the steps of transmitting a sine wave signal for each second transmitting group include:
  • At least two second signal transmitting lines are respectively controlled to output sine wave signals, so that the sine wave signals emitted by at least two columns of second transmitting sub-electrodes are focused.
  • the first emitting group includes a third emitting sub-electrode, and a fourth emitting sub-electrode and a fifth emitting sub-electrode which are separately arranged on opposite sides of the third emitting sub-electrode.
  • the third emitting sub-electrode, the The fourth emitter electrode and the fifth emitter electrode both belong to the first emitter electrode;
  • the step of separately controlling the at least two first signal transmitting lines to output sine wave signals so that the sine wave signals emitted by the at least two rows of first transmitting sub-electrodes are focused includes:
  • the third transmitter sub-electrode is controlled to send a second sine wave signal so that the first sine wave
  • the wave signal and the second sine wave signal are focused at a target position, and the orthographic projection of the target position on the transmitting electrode layer is located in the third transmitting sub-electrode.
  • FIG. 1 is a cross-sectional view of a texture detection module provided by an embodiment of the disclosure
  • FIG. 2 is a schematic diagram of the structure of the emitter electrode layer in the texture detection module provided by another embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of ultrasonic focusing of a group of emission sources in a row direction in a texture detection module provided by another embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of ultrasonic focusing of the emission source in the row direction of the texture detection module provided by another embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of ultrasonic focusing of a set of emission sources in a row direction in a texture detection module provided by another embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of ultrasonic focusing of the emission source in the column direction of the texture detection module provided by another embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of the positions of a receiving sub-electrode and a transmitting sub-electrode in a texture detection module provided by another embodiment of the present disclosure
  • FIG. 8a is one of the structural schematic diagrams of the emitter electrode layer in the texture detection module provided by another embodiment of the present disclosure.
  • 8b is the second structural diagram of the emitter electrode layer in the texture detection module provided by another embodiment of the present disclosure.
  • FIG. 9 is one of the schematic diagrams of the film structure of the first transmitting signal line and the second transmitting signal line in the texture detection module provided by another embodiment of the present disclosure.
  • FIG 10 is the second schematic diagram of the film structure of the first transmitting signal line and the second transmitting signal line in the texture detection module provided by another embodiment of the present disclosure
  • FIG. 11 is a schematic diagram of the structure of the emitter electrode layer in the texture detection module provided by another embodiment of the present disclosure.
  • the embodiment of the present disclosure provides a texture detection module, as shown in FIG. 1 and FIG. 2, including a transmitting electrode layer 110, a receiving electrode layer 120, and a voltage between the transmitting electrode layer 110 and the receiving electrode layer 120.
  • Electrical film layer 130; the transmitting electrode layer 110 includes a transmitting electrode 111, a first transmitting signal line TX-H, and a second transmitting signal line TX-V, wherein the transmitting electrode 111 includes a first transmitter that is insulated from each other The electrode 111A and the second emitter electrode 111B;
  • the plurality of first transmitter electrodes 111A are arranged in N rows and M columns, and the first transmitter electrodes 111A located in the same row are electrically connected to the same first transmitting signal line TX-H, and the N and the M are both Positive integer
  • the plurality of second transmitter electrodes 111B are arranged in X rows and Y columns, and the second transmitter electrodes 111B located in the same column are electrically connected to the same second transmitting signal line TX-V, and both X and Y are Positive integer.
  • the sine wave signal is provided to the piezoelectric film layer through the first transmitter sub-electrodes of N rows, and the piezoelectric film layer is excited to emit ultrasonic waves in the row direction, so that the receiving electrode layer can collect the corresponding rows from the piezoelectric film layer.
  • Directional texture electrical signal in turn, the Y-column second transmitter electrode provides a sine wave signal to the piezoelectric film layer, which excites the piezoelectric film layer to send out ultrasonic waves in the column direction, so that the receiving electrode layer can collect the corresponding data from the piezoelectric film layer.
  • Texture electrical signals in the column direction combining texture electrical signals in two directions to recognize textures can improve the accuracy of texture recognition. Therefore, the technical solution provided by the present disclosure can improve the accuracy of texture recognition.
  • the method of fingerprint recognition is used as an example, but it is not limited to the recognition of fingerprints. It may also be the recognition of palm prints and the recognition of skin textures of other parts, which is not limited here.
  • the above-mentioned emitter electrode layer 110, piezoelectric film layer 130 and receiving electrode layer 120 are sequentially stacked, and the piezoelectric film layer 130 is in contact with the emitter electrode layer 110 and the receiving electrode layer 120 respectively.
  • the first transmitting signal line TX-H and the second transmitting signal line TX-V in the transmitting electrode layer 110 are insulated from each other.
  • the fingerprint detection process includes the transmitting process and the receiving process:
  • the transmitting electrode layer 110 is a high-voltage sine wave signal
  • the receiving electrode layer 120 is a fixed voltage signal.
  • the piezoelectric film layer 130 is excited by the high-voltage sine wave signal in the transmitting electrode 111 to produce an inverse piezoelectric effect.
  • the ultrasonic wave is emitted outward, and the emitted ultrasonic wave is emitted back to the piezoelectric film layer 130 after contacting the user's finger.
  • the reflected ultrasonic waves differ in the location of the valley and the ridge of the fingerprint due to the difference of the user's fingers, so the vibration intensity of the reflected ultrasonic waves will also be different.
  • the vibration intensity of the ultrasonic wave reflected from the valley position is greater than the vibration intensity of the ultrasonic wave reflected from the ridge position;
  • the transmitting electrode layer 110 is switched from a high-voltage sine wave signal to a fixed voltage signal, so that the piezoelectric film layer 130 receives the reflected ultrasonic wave, generating a piezoelectric effect, and generating a vibration corresponding to the intensity of the vibration on the receiving electrode layer 120
  • the AC voltage signal is used to identify the valley position and the ridge position of the fingerprint through the AC voltage signal, thereby identifying the fingerprint.
  • a reflective layer 140 can be provided on the side of the emitter electrode layer 110 away from the piezoelectric film layer 130 to reflect the ultrasonic waves emitted by the piezoelectric film layer 130 to improve the piezoelectric film layer 130. Utilization rate of the emitted ultrasonic wave and the reflection of the finger.
  • an insulating layer may or may not be provided between the reflective layer 140 and the emitter electrode layer 110, which is not limited here.
  • the emission layer 140 may be made of silver material.
  • the above-mentioned emitter electrode layer 110 is cut into first emitter sub-electrodes 111A arranged in N rows and M columns and second emitter sub-electrodes 111B arranged in X rows and Y columns, wherein the first emission signal
  • the line TX-H is used to provide electrical signals for the first transmitting sub-electrodes 111A in N rows
  • the second transmitting signal line TX-V is used to provide electrical signals for the second transmitting sub-electrodes 111B in the Y column, that is, all the first transmitting sub-electrodes 111A It can be used to detect fingerprints in the row direction
  • all the second emitter sub-electrodes 111B can be used to detect fingerprints in the column direction.
  • the above-mentioned rows and columns are two mutually perpendicular linear directions, and the first emitter electrodes located in the same row are all located on the same straight line; the second emitter electrodes located in the same column are all located on the same straight line.
  • the number of the first transmitting signal lines TX-H includes N, and each first transmitting signal line TX-H is connected to a row of first transmitting sub-electrodes 111A; the number of the second transmitting signal lines TX-V includes Y , Each second transmitting signal line TX-V is connected to a column of second transmitting sub-electrodes 111B.
  • the first transmitter electrode 111A of N rows can be used to make the piezoelectric film layer 130 emit ultrasonic waves, and the receiving electrode layer 120 can collect the AC voltage signal corresponding to the fingerprint before using the Y column.
  • the second transmitter electrode 111B causes the piezoelectric film layer 130 to emit ultrasonic waves; alternatively, it can also be sequentially switched; or, the P row of the first transmitter sub-electrodes 111A can also be used to cause the piezoelectric film layer 130 to emit ultrasonic waves, and the receiving electrode layer 120 is completed After the AC voltage signal corresponding to the fingerprint is collected, the second transmitter electrode 111B in column Q is used to make the piezoelectric film layer 130 emit ultrasonic waves.
  • the first transmitting sub-electrode 111A causes the piezoelectric film layer 130 to emit ultrasonic waves.
  • the remaining second transmitting sub-electrodes 111B are used to make the piezoelectric film layer 130 emit ultrasonic waves.
  • the aforementioned P is a positive integer less than N
  • the aforementioned Q is a positive integer less than Y.
  • the embodiments of the present disclosure can also use ultrasonic focusing to detect fingerprints.
  • N rows of first emitter electrodes 111A to cause the piezoelectric film layer 130 to emit ultrasonic waves is used as an example to illustrate:
  • the first emission sub-electrodes 111A are used as a group of emission sources.
  • the phase of the sine wave signal of each row of the first emission sub-electrodes 111A in the emission source that is, the time point when the piezoelectric film layer 130 is excited to emit ultrasonic waves
  • each row in the emission source The ultrasonic wave emitted by the first transmitter electrode 111A is focused on one spot.
  • a set of emission sources includes three rows of first emission sub-electrodes 111A, which are respectively the third emission sub-electrodes 1113 and fourth emission sub-electrodes 1114 and The fifth emitter sub-electrode 1115, the third emitter sub-electrode 1113, the fourth emitter sub-electrode 1114, and the fifth emitter sub-electrode 1115 all belong to the first emitter sub-electrode 111A.
  • the fourth emitter electrode 1114 and the fifth emitter electrode 1115 are controlled to simultaneously emit the first sine wave signal, which excites the piezoelectric film layer 130 to emit ultrasonic waves, and the fourth emitter electrode 1114 and the fifth emitter electrode 1115 emit the first sine wave signal.
  • the preset time point after the sine wave signal controls the third transmitter sub-electrode 1113 to send out a second sine wave signal, which excites the piezoelectric film 130 to emit ultrasonic waves, thereby enabling the three rows of first transmitter sub-electrodes 111A to emit sine wave signals
  • the excited ultrasound is focused directly above the third emitter electrode 1113 (that is, the orthographic projection of the focal position on the emitter electrode layer 110 is located in the third emitter electrode), the energy increases, and the directionality of ultrasound transmission is improved, thereby achieving Improve the effect of fingerprint detection accuracy.
  • the time difference between the time point when the fourth transmitting sub-electrode 1114 and the fifth transmitting sub-electrode 1115 emit the first sine wave signal and the time point when the third transmitting sub-electrode 1113 transmits the second sine wave signal is the fourth transmitting sub-electrode. 1114 and the phase difference between the first sine wave signal in the fifth transmitting sub-electrode 1115 and the second sine wave signal in the third transmitting sub-electrode 1113.
  • the time difference can be calculated according to the distance difference between each first transmitting sub-electrode 111A and the preset focusing point.
  • a group of emission sources may also include 4 rows of first emitter sub-electrodes 111A, 6 rows of first emitter sub-electrodes 111A, 7 rows of first emitter sub-electrodes 111A, etc., which are not limited here.
  • the two groups of emission sources can be independent of each other, that is, there is no shared row of emission sub-electrodes 111A; they can also be partially overlapped, that is, share at least one row of emission sub-electrodes.
  • the next group of emission sources includes the previous group.
  • the third emitter sub-electrode 1113, the fifth emitter sub-electrode 1115, and the sixth emitter sub-electrode 1116 all belong to the first emitter sub-electrode 111A.
  • N rows of first emitter electrodes 111A to cause the piezoelectric film layer 130 to emit ultrasonic waves can be a time-sharing sine wave signal from multiple groups of emission sources to excite the piezoelectric film layer to emit ultrasonic waves, or it can be at least two sets of independent emission sources.
  • a sine wave signal is sent to stimulate the piezoelectric film layer to emit ultrasonic waves, so as to reduce the fingerprint detection time.
  • the two emission sources at both ends of the first emitter electrode 111A in the N row simultaneously emit sine wave signals.
  • the piezoelectric film is excited to emit ultrasonic waves, which can shorten the time of fingerprint detection by half.
  • the Y-column second emitter electrode 111B to emit a sine wave signal to excite the piezoelectric film layer to emit ultrasound Take the Y-column second emitter electrode 111B to emit a sine wave signal to excite the piezoelectric film layer to emit ultrasound as an example: at least two consecutive columns of second emitter electrode 111B can be used as a group of emission sources, and each of the emission sources can be controlled.
  • the phase of the sine wave signal of the second emitter electrode 111B in the column that is, the time point at which the piezoelectric film layer 130 is excited to emit ultrasonic waves), so that the sine wave signal from each column of the second emitter electrode 111B in the emission source excites the piezoelectric film layer
  • the emitted ultrasound is focused on one place.
  • a set of emission sources includes two columns of second emission sub-electrodes 111B, which are the seventh emission sub-electrode 1117 and the eighth emission sub-electrode 1118, the seventh emission sub-electrode 1117 and the eighth emission sub-electrode respectively All 1118 belong to the second emitter electrode 111B.
  • the seventh emitter electrode 1117 and the eighth emitter electrode 1118 are controlled to simultaneously emit sine wave signals to excite the piezoelectric film layer to emit ultrasonic waves, so that the sine wave signals from the two columns of second emitter electrodes 111B can excite the piezoelectric film.
  • the ultrasonic waves emitted by the layer are focused directly above the gap between the seventh emitter electrode 1117 and the eighth emitter electrode 1118, the energy is increased, the directionality of ultrasonic transmission is improved, and the effect of improving the accuracy of fingerprint detection is achieved.
  • a group of emission sources may also be 4 columns of second emitter sub-electrodes 111B, 6 columns of second emitter sub-electrodes 111B, 7 columns of second emitter sub-electrodes 111B, etc., which are not limited here.
  • the two sets of emission sources can be independent of each other, that is, there is no shared second emission sub-electrode 111B; they can also be partially overlapped, that is, they share at least one second emission sub-electrode 111B.
  • the next set of emission The source includes the eighth emitter sub-electrode 1118 of the previous group of emitter sources and the new ninth emitter sub-electrode 1119.
  • the eighth emitter sub-electrode 1118 and the ninth emitter sub-electrode 1119 both belong to the second emitter sub-electrode 111B.
  • using the second emitter electrode 111B in the Y column to cause the piezoelectric film layer 130 to emit ultrasonic waves can be a time-sharing sine wave signal from multiple groups of emission sources to excite the piezoelectric film layer to emit ultrasonic waves, or at least two groups of independent emission sources. Simultaneously, a sine wave signal is sent to stimulate the piezoelectric film to emit ultrasonic waves, which reduces the length of fingerprint detection.
  • the Y-column first emitter sub-electrodes 111A is emitted; or after a part of the rows of the first emitter sub-electrodes 111A are emitted, then part
  • the second transmitting sub-electrode 111B emits, and then the first transmitting sub-electrode 111A transmits part of the row, and then the second transmitting sub-electrode 111B transmits part of the column.
  • the texture detection module can use the receiving electrode layer 120 to collect the emission from the row direction.
  • the ultrasonic focusing is based on the fingerprint, it is reflected back to the piezoelectric film, and the first voltage signal generated by the piezoelectric film and the ultrasonic wave emitted from the column direction is focused and reflected back to the piezoelectric film based on the fingerprint, and the piezoelectric film corresponds to
  • the generated second voltage signal realizes two-dimensional focus detection of fingerprints and improves the accuracy of texture detection.
  • the receiving electrode layer 120 includes a plurality of receiving sub-electrodes 121, wherein the orthographic projection of each receiving sub-electrode 121 on the piezoelectric film layer 130 includes at least one target emitting sub-electrode The orthographic projection of 111 on the piezoelectric film layer 130, and does not include the orthographic projection of other emitter sub-electrodes on the piezoelectric film layer 130.
  • the target emitter sub-electrode 111 and the other emitter sub-electrodes belong to The first emitter sub-electrode 111A or the second emitter sub-electrode 111B, and the other emitter sub-electrodes are the first emitter sub-electrode 111A or the second emitter sub-electrode 111B except for the target emitter sub-electrode 111.
  • each first transmitting sub-electrode 111A or each second transmitting sub-electrode 111B has a receiving sub-electrode 121 arranged opposite to it.
  • Each receiving sub-electrode 121 transmits a voltage signal through a wire.
  • the number of receiving sub-electrodes 121 may be the sum of the first transmitting sub-electrodes 111A and the second transmitting sub-electrodes 111B, so that each receiving sub-electrode 121 can be the same as a first transmitting sub-electrode 111A or a second transmitting sub-electrode 111B.
  • one receiving sub-electrode 121 is directly opposite to three target transmitting sub-electrodes 111, that is, the orthographic projection of one receiving sub-electrode 121 on the piezoelectric film layer 130 includes three target transmitting sub-electrodes 111 on the piezoelectric film.
  • the orthographic projection on the layer 130 does not include the orthographic projection of other emitter electrodes on the piezoelectric film layer 130.
  • each group of emission sources excites the ultrasonic waves from the piezoelectric film layer 130 to be transmitted back to the piezoelectric film layer 130 through the texture
  • the whole layer of the receiving electrode layer 120 is generated by the piezoelectric film layer 130 through the piezoelectric effect. Electrical signal.
  • one row of second emitter sub-electrodes 111B is located between two adjacent rows of first emitter sub-electrodes 111A, and one column of second emitter sub-electrodes 111B is located between two adjacent rows of first emitter sub-electrodes 111A. between.
  • each row of second emitter electrode 111B is arranged in the gap between two adjacent rows of first emitter electrode 111A, and each column of second emitter electrode 111B is arranged on two adjacent columns of first emitter electrode 111A. In the gap between the electrodes 111A, the second emitter electrode 111B is integrated in the first emitter electrode 111A.
  • the first emitter electrode 111A and the second emitter electrode 111B can respectively perform the effects of exciting the ultrasonic wave from the row direction to detect the fingerprint and the ultrasonic wave exciting from the column direction for the same area.
  • first emitter electrode 111A and the second emitter electrode 111B may both be rhombus (as shown in FIG. 2) and a symmetrical hexagon (as shown in FIG. 8a and FIG. 8b).
  • the first emitter electrodes 111A located in the same column are not connected to each other, and the second emitter electrodes 111B located in the same row are not connected to each other.
  • each transmitting sub-electrode 111 is connected to only one first transmitting signal line TX-H or the second transmitting signal line TX-V), therefore, the first transmitting sub-electrode 111A will only be connected to other transmitting sub-electrodes 111A in the same row
  • the first transmitting sub-electrode 111A is a sine wave signal at the same time, and the other first transmitting sub-electrodes 111A in the same column will not be a sine wave signal at the same time.
  • the second transmitting sub-electrode 111B will only generate sine wave signals at the same time as the other second transmitting sub-electrodes 111B in the same column, and will not simultaneously generate sine wave signals with the other second transmitting sub-electrodes 111B in the same row.
  • the first transmitting signal line TX-H and the second transmitting signal line TX-V are arranged in different layers, and the transmitting electrode layer 110 further includes The insulating layer 140 between the first transmission signal line and the second transmission signal line.
  • the cross-sectional view of FIG. 9 is a cross-sectional view at the intersection of the first transmission signal line TX-H and the second transmission signal line TX-V, and the cross-section line is parallel to the extending direction of the first transmission signal line TX-H.
  • the first transmission signal line TX-H and the second transmission signal line TX-V are arranged in different layers, at the intersection of the first transmission signal line TX-H and the second transmission signal line TX-V, as shown in the figure As shown in 5, the two are insulated from each other through the insulating layer 140, so as to prevent the electrical signal of the first transmitting signal line TX-H and the electrical signal of the second transmitting signal line TX-V from interfering with each other.
  • the first transmission signal line TX-H includes a first part 910 and a second part 920, and the second transmission signal line TX-V is connected to the first part 920.
  • a part 910 is arranged in the same layer and is located between two adjacent first parts 910; the transmitting electrode layer 110 further includes an insulating layer 140 covering the first part 910 and the second transmitting signal line TX-V.
  • the layer 140 is provided with a via hole, and the second portion 920 connects two adjacent first portions 910 through the via hole.
  • the cross-sectional view of FIG. 10 is a cross-sectional view at the intersection of the first transmission signal line TX-H and the second transmission signal line TX-V, and the cross-section line is parallel to the extending direction of the first transmission signal line TX-H.
  • the first part 910 of the first transmitting signal line TX-H and the second transmitting signal line TX-V are arranged in the same layer, and at the intersection of the first transmitting signal line TX-H and the second transmitting signal line TX-V As shown in FIG. 10, the second transmitting signal line TX-V is located at the gap between two adjacent first portions 910 and is spaced apart from the first portion 910.
  • the first portion 910 of the first transmitting signal line TX-H and the second transmitting signal line TX-V are covered by the insulating layer 140, and the second portion 920 is used to pass through the via hole in the insulating layer 140 to connect two adjacent first portions 910 , To achieve signal transmission in the row direction between two adjacent first parts 910.
  • the first transmitting sub-electrodes 111A located in the same column are electrically connected to the same second transmitting signal line TX-V, and the second transmitting sub-electrodes 111B located in the same row are electrically connected to the same first transmitting sub-electrode.
  • the signal line TX-H is electrically connected.
  • the first transmitting sub-electrodes 111A of the M column can also be used to also transmit the sine wave signal.
  • the accuracy of fingerprint recognition can be further increased by increasing the amount of ultrasonic reflection data.
  • the embodiment of the present disclosure also provides a display device including the texture detection module as described above.
  • the display device can be a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.
  • the embodiment of the present disclosure also provides a method for controlling a texture detection module, the method including:
  • each first transmitting group includes at least Two rows of first emitter electrodes
  • each second firing group includes at least two rows of second firing sub-electrodes
  • the fingerprint information is determined based on the first voltage signal and the second voltage signal.
  • the sine wave signal is provided to the piezoelectric film layer through the first transmitter sub-electrodes of N rows, and the piezoelectric film layer is excited to emit ultrasonic waves in the row direction, so that the receiving electrode layer can collect the corresponding rows from the piezoelectric film layer.
  • Directional texture electrical signal in turn, the Y-column second transmitter electrode provides a sine wave signal to the piezoelectric film layer, which excites the piezoelectric film layer to send out ultrasonic waves in the column direction, so that the receiving electrode layer can collect the corresponding data from the piezoelectric film layer.
  • Texture electrical signals in the column direction combining texture electrical signals in two directions to recognize textures can improve the accuracy of texture recognition. Therefore, the technical solution provided by the present disclosure can improve the accuracy of texture recognition.
  • the above-mentioned emitter electrode layer 110, piezoelectric film layer 130 and receiving electrode layer 120 are sequentially stacked, and the piezoelectric film layer 130 is in contact with the emitter electrode layer 110 and the receiving electrode layer 120 respectively.
  • the fingerprint detection process includes the transmitting process and the receiving process:
  • the transmitting electrode layer 110 is a high-voltage sine wave signal
  • the receiving electrode layer 120 is a fixed voltage signal.
  • the piezoelectric film layer 130 is excited by the high-voltage sine wave signal in the transmitting electrode 111 to produce an inverse piezoelectric effect.
  • the ultrasonic wave is emitted outward, and the emitted ultrasonic wave is emitted back to the piezoelectric film layer 130 after contacting the user's finger.
  • the reflected ultrasonic waves differ in the location of the valley and the ridge of the fingerprint due to the difference of the user's fingers, so the vibration intensity of the reflected ultrasonic waves will also be different.
  • the vibration intensity of the ultrasonic wave reflected from the valley position is greater than the vibration intensity of the ultrasonic wave reflected from the ridge position;
  • the transmitting electrode layer 110 is switched from a high-voltage sine wave signal to a fixed voltage signal, so that the piezoelectric film layer 130 receives the reflected ultrasonic wave, generating a piezoelectric effect, and generating a vibration corresponding to the intensity of the vibration on the receiving electrode layer 120
  • the AC voltage signal is used to identify the valley position and the ridge position of the fingerprint through the AC voltage signal, thereby identifying the fingerprint.
  • a reflective layer 140 can be provided on the side of the emitter electrode layer 110 away from the piezoelectric film layer 130 to reflect the ultrasonic waves emitted by the piezoelectric film layer 130 to improve the piezoelectric film layer 130. Utilization rate of the emitted ultrasonic wave and the reflection of the finger.
  • an insulating layer may or may not be provided between the reflective layer 140 and the emitter electrode layer 110, which is not limited here.
  • the emission layer 140 may be made of silver material.
  • the above-mentioned first voltage signal is a voltage signal generated by the piezoelectric film layer and correspondingly generated by the piezoelectric film layer after focusing the ultrasonic waves emitted from the piezoelectric film layer in the row direction collected by the receiving electrode layer 120 and reflecting back to the piezoelectric film layer based on fingerprints;
  • the signal is a voltage signal generated by the piezoelectric film layer based on the fingerprint and reflected back to the piezoelectric film layer after the piezoelectric film layer emits ultrasonic waves from the column direction and is collected by the receiving electrode layer 120 to focus.
  • the above-mentioned emitter electrode layer 110 is cut into first emitter sub-electrodes 111A arranged in N rows and M columns and second emitter sub-electrodes 111B arranged in X rows and Y columns, wherein the first emission signal
  • the line TX-H is used to provide electrical signals for the first transmitting sub-electrodes 111A in N rows
  • the second transmitting signal line TX-V is used to provide electrical signals for the second transmitting sub-electrodes 111B in the Y column, that is, all the first transmitting sub-electrodes 111A It can be used to detect fingerprints in the row direction
  • all the second emitter sub-electrodes 111B can be used to detect fingerprints in the column direction.
  • the number of the first transmitting signal lines TX-H includes N, and each first transmitting signal line TX-H is connected to a row of first transmitting sub-electrodes 111A; the number of the second transmitting signal lines TX-V includes Y , Each second transmitting signal line TX-V is connected to a column of second transmitting sub-electrodes 111B.
  • the first emitter electrode 111A of N rows can be used to make the piezoelectric film layer 130 emit ultrasonic waves, and the receiving electrode layer 120 can collect the AC voltage signal corresponding to the fingerprint before using the Y column.
  • the second transmitter electrode 111B causes the piezoelectric film layer 130 to emit ultrasonic waves; alternatively, it can also be sequentially switched; or, the P row of the first transmitter sub-electrodes 111A can also be used to cause the piezoelectric film layer 130 to emit ultrasonic waves, and the receiving electrode layer 120 is completed After the AC voltage signal corresponding to the fingerprint is collected, the second transmitter electrode 111B in column Q is used to make the piezoelectric film layer 130 emit ultrasonic waves.
  • the first transmitting sub-electrode 111A causes the piezoelectric film layer 130 to emit ultrasonic waves.
  • the remaining second transmitting sub-electrodes 111B are used to make the piezoelectric film layer 130 emit ultrasonic waves.
  • the aforementioned P is a positive integer less than N
  • the aforementioned Q is a positive integer less than Y.
  • step of transmitting a sine wave signal for each first transmitting group includes:
  • the steps of transmitting a sine wave signal for each second transmitting group include:
  • At least two second signal transmitting lines are respectively controlled to output sine wave signals, so that the sine wave signals emitted by at least two columns of second transmitting sub-electrodes are focused.
  • This embodiment uses ultrasonic focusing to detect fingerprints.
  • the piezoelectric film layer 130 is used to emit ultrasonic waves by using N rows of first emitter electrodes 111A as an example for description: at least two consecutive rows of first emitter electrodes
  • the electrode 111A is used as a set of emission sources, and the phase of the 111A sine wave signal of each row of the first emission sub-electrodes in the emission source is controlled (that is, the time point when the piezoelectric film layer 130 is excited to emit ultrasonic waves), so that the first emission sub-electrodes of each row in the emission source
  • the ultrasonic wave emitted by 111A is focused on one spot.
  • a set of emission sources includes three rows of first emission sub-electrodes 111A, which are respectively the third emission sub-electrodes 1113 and fourth emission sub-electrodes 1114 and The fifth emitter sub-electrode 1115, the third emitter sub-electrode 1113, the fourth emitter sub-electrode 1114, and the fifth emitter sub-electrode 1115 all belong to the first emitter sub-electrode 111A.
  • the fourth emitter electrode 1114 and the fifth emitter electrode 1115 are controlled to simultaneously emit the first sine wave signal, which excites the piezoelectric film layer 130 to emit ultrasonic waves, and the fourth emitter electrode 1114 and the fifth emitter electrode 1115 emit the first sine wave signal.
  • the preset time point after the sine wave signal controls the third transmitter sub-electrode 1113 to send out a second sine wave signal, which excites the piezoelectric film 130 to emit ultrasonic waves, thereby enabling the three rows of first transmitter sub-electrodes 111A to emit sine wave signals
  • the excited ultrasound is focused directly above the third emitter electrode 1113 (that is, the orthographic projection of the focal position on the emitter electrode layer 110 is located in the third emitter electrode), the energy increases, and the directionality of ultrasound transmission is improved, thereby achieving Improve the effect of fingerprint detection accuracy.
  • the time difference between the time point when the fourth transmitting sub-electrode 1114 and the fifth transmitting sub-electrode 1115 emit the first sine wave signal and the time point when the third transmitting sub-electrode 1113 transmits the second sine wave signal is the fourth transmitting sub-electrode. 1114 and the phase difference between the first sine wave signal in the fifth transmitting sub-electrode 1115 and the second sine wave signal in the third transmitting sub-electrode 1113.
  • the time difference can be calculated according to the distance difference between each first transmitting sub-electrode 111A and the preset focusing point.
  • a group of emission sources may also include 4 rows of first emitter sub-electrodes 111A, 6 rows of first emitter sub-electrodes 111A, 7 rows of first emitter sub-electrodes 111A, etc., which are not limited here.
  • the two groups of emission sources can be independent of each other, that is, there is no shared row of emission sub-electrodes 111A; they can also be partially overlapped, that is, share at least one row of emission sub-electrodes.
  • the next group of emission sources includes the previous group.
  • the third emitter sub-electrode 1113, the fifth emitter sub-electrode 1115, and the sixth emitter sub-electrode 1116 all belong to the first emitter sub-electrode 111A.
  • N rows of first emitter electrodes 111A to cause the piezoelectric film layer 130 to emit ultrasonic waves can be a time-sharing sine wave signal from multiple groups of emission sources to excite the piezoelectric film layer to emit ultrasonic waves, or it can be at least two sets of independent emission sources.
  • a sine wave signal is sent to stimulate the piezoelectric film layer to emit ultrasonic waves, so as to reduce the fingerprint detection time.
  • the two emission sources at both ends of the first emitter electrode 111A in the N row simultaneously emit sine wave signals.
  • the piezoelectric film is excited to emit ultrasonic waves, which can shorten the time of fingerprint detection by half.
  • the Y-column second emitter electrode 111B to emit a sine wave signal to excite the piezoelectric film layer to emit ultrasound Take the Y-column second emitter electrode 111B to emit a sine wave signal to excite the piezoelectric film layer to emit ultrasound as an example: at least two consecutive columns of second emitter electrode 111B can be used as a group of emission sources, and each of the emission sources can be controlled.
  • the phase of the sine wave signal of the second emitter electrode 111B in the column that is, the time point at which the piezoelectric film layer 130 is excited to emit ultrasonic waves), so that the sine wave signal from each column of the second emitter electrode 111B in the emission source excites the piezoelectric film layer
  • the emitted ultrasound is focused on one place.
  • a set of emission sources includes two columns of second emission sub-electrodes 111B, which are the seventh emission sub-electrode 1117 and the eighth emission sub-electrode 1118, the seventh emission sub-electrode 1117 and the eighth emission sub-electrode respectively All 1118 belong to the second emitter electrode 111B.
  • the seventh emitter electrode 1117 and the eighth emitter electrode 1118 are controlled to simultaneously emit sine wave signals to excite the piezoelectric film layer to emit ultrasonic waves, so that the sine wave signals from the two columns of second emitter electrodes 111B can excite the piezoelectric film.
  • the ultrasonic waves emitted by the layer are focused directly above the gap between the seventh transmitter electrode 1117 and the eighth transmitter electrode 1118, and the energy is increased, which improves the directionality of ultrasonic transmission, thereby achieving the effect of improving the accuracy of fingerprint detection.
  • a group of emission sources may also be 4 columns of second emitter sub-electrodes 111B, 6 columns of second emitter sub-electrodes 111B, 7 columns of second emitter sub-electrodes 111B, etc., which are not limited here.
  • the two sets of emission sources can be independent of each other, that is, there is no shared second emission sub-electrode 111B; they can also be partially overlapped, that is, they share at least one second emission sub-electrode 111B.
  • the next set of emission The source includes the eighth emitter sub-electrode 1118 of the previous group of emitter sources and the new ninth emitter sub-electrode 1119.
  • the eighth emitter sub-electrode 1118 and the ninth emitter sub-electrode 1119 both belong to the second emitter sub-electrode 111B.
  • using the second emitter electrode 111B in the Y column to cause the piezoelectric film layer 130 to emit ultrasonic waves can be a time-sharing sine wave signal from multiple groups of emission sources to excite the piezoelectric film layer to emit ultrasonic waves, or at least two groups of independent emission sources. Simultaneously, a sine wave signal is sent to stimulate the piezoelectric film to emit ultrasonic waves, which reduces the length of fingerprint detection.

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Abstract

本公开提供一种纹理检测模组及其驱动方法、和显示装置，其中，纹理检测模组，包括发射电极层、接收电极层以及位于所述发射电极层和所述接收电极层之间的压电膜层；所述发射电极层包括发射电极、第一发射信号线和第二发射信号线，其中，所述发射电极包括相互绝缘设置的第一发射子电极和第二发射子电极；多个第一发射子电极呈N行M列排布，位于同一行的第一发射子电极均与同一根第一发射信号线电连接，所述N和所述M均为正整数；多个第二发射子电极呈X行Y列排布，位于同一列的第二发射子电极均与同一根第二发射信号线电连接，所述X和所述Y均为正整数。

Description

纹理检测模组及其驱动方法、和显示装置
相关申请的交叉引用
本申请主张在2020年2月28日在中国提交的中国专利申请号No.202010128113.5的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及显示技术领域，尤其涉及一种纹理检测模组及其驱动方法、和显示装置。
背景技术
目前，在超声波指纹识别技术中，反射波接触到纹理(指纹或者掌纹)时，由于纹理的谷位置和脊位置有差异，所以不同纹理的反射波的震动强度就会有差异，由此，通过检测反射波的震动强度就可以确定手指谷脊的位置，进而实现纹理识别的效果。
然而，相关技术中，无论是通过峰值检波检测反射波，还是通过幅度调制检测反射波，都存在纹理识别精度低的问题。
发明内容
第一方面，本公开实施例提供一种纹理检测模组，包括发射电极层、接收电极层以及位于所述发射电极层和所述接收电极层之间的压电膜层；所述发射电极层包括发射电极、第一发射信号线和第二发射信号线，其中，所述发射电极包括相互绝缘设置的第一发射子电极和第二发射子电极；
多个第一发射子电极呈N行M列排布，位于同一行的第一发射子电极均与同一根第一发射信号线电连接，所述N和所述M均为正整数；
多个第二发射子电极呈X行Y列排布，位于同一列的第二发射子电极均与同一根第二发射信号线电连接，所述X和所述Y均为正整数。
进一步地，，一行第二发射子电极位于相邻两行第一发射子电极之间，且一列第二发射子电极位于相邻两列第一发射子电极之间。
进一步地，所述N和所述M大于等于2时，四个第一发射子电极包围一个第二发射子电极设置。
进一步地，位于同一列的第一发射子电极互不相连，且位于同一行的第二发射子电极互不相连。
进一步地，所述第一发射信号线和所述第二发射信号线异层设置，所述发射电极层还包括位于所述第一发射信号线和所述第二发射信号线之间的绝缘层。
进一步地，所述第一发射信号线包括第一部分和第二部分；所述第二发射信号线与所述第一部分同层设置且位于相邻两个第一部分之间；所述发射电极层还包括覆盖所述第一部分和所述第二发射信号线的绝缘层，所述绝缘层开设有过孔，所述第二部分通过所述过孔连接相邻的两个第一部分。
进一步地，所述第一发射子电极和所述第二发射子电极均为菱形或中心对称的六边形。
进一步地，位于同一列的第一发射子电极与同一根第二发射信号线电连接，且位于同一行的第二发射子电极与同一根第一发射信号线电连接。
进一步地，所述接收电极层包括多个接收子电极，其中，每一接收子电极在所述压电膜层上的正投影包含至少一个目标发射子电极在所述压电膜层上的正投影，且不包含其他发射子电极在所述压电膜层上的正投影，所述目标发射子电极和所述其他发射子电极均属于第一发射子电极或第二发射子电极，且所述其他发射子电极为除所述目标发射子电极之外的第一发射子电极或第二发射子电极。
进一步地，每一所述第一发射子电极或每一所述第二发射子电极均有一个与之正对设置的接收子电极；每一所述接收子电极通过一根走线传输电压信号。
进一步地，每一所述接收子电极与多个所述目标发射子电极正对设置。
进一步地，位于同一行的第一发射子电极均位于同一第一直线上；位于同一列的第二发射子电极均位于同一第二直线上。
进一步地，所述第一直线垂直于所述第二直线。
第二方面，本公开实施例还提供一种显示装置，包括如上所述的纹理检 测模组。
第三方面，本公开实施例还提供一种纹理检测模组的控制方法，应用于如上所述的纹理检测模组，所述方法包括：
在第一时间段，分别控制多个第一发射组发射弦波信号，并获取所述接收电极采集的所述压电膜层产生的第一电压信号，其中，每个第一发射组包括至少两行第一发射子电极；
在第二时间段，分别控制多个第二发射组发射弦波信号，并获取所述接收电极采集的所述压电膜层产生的第二电压信号，其中，所述第一时间段和所述第二时间段不重合，每个第二发射组包括至少两列第二发射子电极；
基于所述第一电压信号和所述第二电压信号确定指纹信息。
进一步地，每一第一发射组发射弦波信号的步骤，包括：
分别控制至少两根第一信号发射线输出弦波信号，使得至少两行第一发射子电极发射的弦波信号聚焦；
每一第二发射组发射弦波信号的步骤，包括：
分别控制至少两根第二信号发射线输出弦波信号，使得至少两列第二发射子电极发射的弦波信号聚焦。
进一步地，第一发射组包括第三发射子电极、以及分设于所述第三发射子电极相对两侧的第四发射子电极和第五发射子电极，所述第三发射子电极、所述第四发射子电极和所述第五发射子电极均属于第一发射子电极；
所述分别控制至少两根第一信号发射线输出弦波信号，使得至少两行第一发射子电极发射的弦波信号聚焦的步骤，包括：
控制所述第四发射子电极和所述第五发射子电极同时发出第一弦波信号；
在所述第四发射子电极和所述第五发射子电极发出第一弦波信号后的预设时间点，控制所述第三发射子电极发出第二弦波信号，使得所述第一弦波信号和所述第二弦波信号在目标位置聚焦，所述目标位置在所述发射电极层的正投影位于所述第三发射子电极内。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例描 述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本公开一实施例提供的纹理检测模组的剖视图；
图2为本公开另一实施例提供的纹理检测模组中发射电极层的结构示意图；
图3为本公开另一实施例提供的纹理检测模组中一组行方向的发射源超声波聚焦的示意图；
图4为本公开另一实施例提供的纹理检测模组中行方向的发射源超声波聚焦的示意图；
图5为本公开另一实施例提供的纹理检测模组中一组列方向的发射源超声波聚焦的示意图；
图6为本公开另一实施例提供的纹理检测模组中列方向的发射源超声波聚焦的示意图；
图7为本公开另一实施例提供的纹理检测模组中一个接收子电极与发射子电极的位置示意图；
图8a为本公开另一实施例提供的纹理检测模组中发射电极层的结构示意图之一；
图8b为本公开另一实施例提供的纹理检测模组中发射电极层的结构示意图之二；
图9为本公开另一实施例提供的纹理检测模组中第一发射信号线和第二发射信号线的膜层结构示意图之一；
图10为本公开另一实施例提供的纹理检测模组中第一发射信号线和第二发射信号线的膜层结构示意图之二；
图11为本公开另一实施例提供的纹理检测模组中发射电极层的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行 清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本公开实施例提供一种纹理检测模组，如图1和图2所示，包括发射电极层110、接收电极层120以及位于所述发射电极层110和所述接收电极层120之间的压电膜层130；所述发射电极层110包括发射电极111、第一发射信号线TX-H和第二发射信号线TX-V，其中，所述发射电极111包括相互绝缘设置的第一发射子电极111A和第二发射子电极111B；
多个第一发射子电极111A呈N行M列排布，位于同一行的第一发射子电极111A均与同一根第一发射信号线TX-H电连接，所述N和所述M均为正整数；
多个第二发射子电极111B呈X行Y列排布，位于同一列的第二发射子电极111B均与同一根第二发射信号线TX-V电连接，所述X和所述Y均为正整数。
本公开实施例中，通过N行第一发射子电极向压电膜层提供弦波信号，激发压电膜层发出行方向的超声波，从而使接收电极层能够从压电膜层采集到对应行方向的纹理电信号；又通过Y列第二发射子电极向压电膜层提供弦波信号，激发压电膜层发出列方向的超声波，从而使接收电极层能够从压电膜层采集到对应列方向的纹理电信号；结合两个方向的纹理电信号识别纹理，能够提高对纹理的识别精度。因此，本公开提供的技术方案能够提高对纹理的识别精度。
本公开实施例中，均以指纹识别的方式进行举例说明，但是并不限于对指纹的识别，还可以是对掌纹的识别、其他部位皮肤纹理的识别，此处不作限定。
如图1和图2所示，上述发射电极层110、压电膜层130和接收电极层120依次叠设，压电膜层130分别与发射电极层110和接收电极层120接触。其中，发射电极层110中的第一发射信号线TX-H与第二发射信号线TX-V相互绝缘设置。
在指纹检测过程中包括发射过程和接收过程：
在发射过程中，发射电极层110为高压弦波信号，接收电极层120为固定电压信号，此时，压电膜层130由于受到发射电极111中高压弦波信号的激发产生逆压电效应，向外发射超声波，发射的超声波接触到用户手指后会发射回压电膜层130。其中，反射回的超声波由于用户手指的不同，指纹的谷位置和脊位置也不同，因此反射回的超声波的震动强度也会有差异。具体的，从谷位置反射回的超声波的震动强度大于从脊位置反射回的超声波的震动强度；
在接收过程中，将发射电极层110从高压弦波信号切换为固定电压信号，从而压电膜层130接收到反射回的超声波，产生压电效应，在接收电极层120上产生与震动强度对应的交流电压信号，通过该交流电压信号识别指纹的谷位置和脊位置，从而识别指纹。
另外，如图1所示，还可以在发射电极层110远离压电膜层130的一侧设置一层反射层140，用于反射压电膜层130发出的超声波，以提高压电膜层130发出的超声波与手指发生反射的利用率。其中，反射层140与发射电极层110之间可以设置绝缘层，也可以不设置绝缘层能，此处不作限定。发射层140可以采用银材料制成。
本公开实施例中，上述发射电极层110被切割为呈N行M列排布的第一发射子电极111A和呈X行Y列排布的第二发射子电极111B，其中，第一发射信号线TX-H用于为N行第一发射子电极111A提供电信号，第二发射信号线TX-V用于为Y列第二发射子电极111B提供电信号，即第一发射子电极111A全部可以用于行方向对指纹的检测，第二发射子电极111B全部可以用于列方向对指纹的检测。
需要说明的是，上述的行和列是两个相互垂直的直线方向，位于同一行的第一发射子电极均位于同一直线上；位于同一列的第二发射子电极均位于同一直线上。
上述第一发射信号线TX-H的数量包括N根，每一根第一发射信号线TX-H与一行第一发射子电极111A连接；上述第二发射信号线TX-V的数量包括Y根，每一根第二发射信号线TX-V与一列第二发射子电极111B连接。
本公开实施例在指纹检测过程中，可以是利用N行第一发射子电极111A 使压电膜层130发出超声波，且接收电极层120完成指纹对应的交流电压信号的采集后，才利用Y列第二发射子电极111B使压电膜层130发出超声波；或者，也可以顺序调换；或者，还可以利用P行第一发射子电极111A使压电膜层130发出超声波，待接收电极层120完成指纹对应的交流电压信号的采集后，再利用Q列第二发射子电极111B使压电膜层130发出超声波，待接收电极层120完成指纹对应的交流电压信号的采集后，再重新利用剩余行第一发射子电极111A使压电膜层130发出超声波，待接收电极层120完成指纹对应的交流电压信号的采集后，再利用剩余列第二发射子电极111B使压电膜层130发出超声波，此处不作限定。上述P为小于N的正整数，上述Q为小于Y的正整数。
另外，本公开实施例还可以采用超声波聚焦的方式进行指纹的检测，具体的，以利用N行第一发射子电极111A使压电膜层130发出超声波为例进行说明：可以将连续的至少2行第一发射子电极111A作为一组发射源，通过控制发射源内各行第一发射子电极111A弦波信号的相位(即激发压电膜层130发射超声波的时间点)，从而使发射源中各行第一发射子电极111A发出的超声波聚焦与一处。
例如：如图3所示，一组发射源包括3行第一发射子电极111A，分别为第三发射子电极1113和分设于第三发射子电极1113相对两侧的第四发射子电极1114和第五发射子电极1115，第三发射子电极1113、第四发射子电极1114和第五发射子电极1115均属于第一发射子电极111A。
其中，控制第四发射子电极1114和第五发射子电极1115同时发出第一弦波信号，激发压电膜层130发出超声波，在第四发射子电极1114和第五发射子电极1115发出第一弦波信号后的预设时间点控制第三发射子电极1113再发出第二弦波信号，激发压电膜层130发出超声波，从而能够使得这3行第一发射子电极111A发出的弦波信号所激发的超声波在第三发射子电极1113的正上方聚焦(即聚焦位置在发射电极层110上的正投影位于第三发射子电极内)，能量增大，提高超声波传输的方向性，进而达到提高对指纹检测精度的效果。
上述第四发射子电极1114和第五发射子电极1115发出第一弦波信号的 时间点与第三发射子电极1113发出第二弦波信号的时间点之间的时间差即为第四发射子电极1114和第五发射子电极1115中第一弦波信号与第三发射子电极1113中第二弦波信号之间的相位差。该时间差可以根据各第一个发射子电极111A与预设聚焦点的距离之间的距离差计算得到。
需要说明的是，一组发射源还可以是4行第一发射子电极111A、6行第一发射子电极111A、7行第一发射子电极111A等等，此处不作限定。
其中，两组发射源可以相互独立，即没有共用的一行发射子电极111A；也可以部分重合，即共用至少一行发射子电极，例如：如图3所示，下一组发射源包括前一组发射源的第三发射子电极1113和第五发射子电极1115、以及新的第六发射子电极116。第三发射子电极1113、第五发射子电极1115和第六发射子电极1116均属于第一发射子电极111A。
另外，利用N行第一发射子电极111A使压电膜层130发出超声波可以是多组发射源分时发出弦波信号激发压电膜层发出超声波，也可以是至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波，以达到减少指纹检测时长的效果。
以至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波为例，如图4所示，N行第一发射子电极111A首尾两端的两个发射源同时发出弦波信号激发压电膜层发出超声波，从而能够缩短一半指纹检测的时长。
以利用Y列第二发射子电极111B发出弦波信号激发压电膜层发出超声波为例进行说明：可以将连续的至少2列第二发射子电极111B作为一组发射源，通过控制发射源内各列第二发射子电极111B弦波信号的相位(即激发压电膜层130发射超声波的时间点)，从而使发射源中各列第二发射子电极111B发出的弦波信号激发压电膜层发出的超声波聚焦与一处。
例如：如图5所示，一组发射源包括2列第二发射子电极111B，分别为第七发射子电极1117和第八发射子电极1118，第七发射子电极1117和第八发射子电极1118均属于第二发射子电极111B。
其中，控制第七发射子电极1117和第八发射子电极1118同时发出弦波信号激发压电膜层发出超声波，从而能够使得这2列第二发射子电极111B发出的弦波信号激发压电膜层发出的超声波在第七发射子电极1117和第八发射 子电极1118之间间隙的正上方聚焦，能量增大，提高超声波传输的方向性，进而达到提高对指纹检测精度的效果。
需要说明的是，一组发射源还可以是4列第二发射子电极111B、6列第二发射子电极111B、7列第二发射子电极111B等等，此处不作限定。
其中，两组发射源可以相互独立，即没有共用的一列第二发射子电极111B；也可以部分重合，即共用至少一列第二发射子电极111B，例如：如图5所示，下一组发射源包括前一组发射源的第八发射子电极1118和新的第九发射子电极1119。第八发射子电极1118和第九发射子电极1119均属于第二发射子电极111B。
另外，利用Y列第二发射子电极111B使压电膜层130发出超声波可以是多组发射源分时发出弦波信号激发压电膜层发出超声波，也可以是至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波，达到减少指纹检测时长的效果。
以至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波为例，如图6所示，Y列第二发射子电极111B首尾两端的两个发射源同时发出弦波信号激发压电膜层发出超声波，从而能够缩短一半指纹检测的时长。
本公开实施例中，无论是N行第一发射子电极111A全部发射完成后，再开始Y列第一发射子电极111A发射的方式；还是部分行第一发射子电极111A发射后，接着部分列第二发射子电极111B发射，之后继续部分行第一发射子电极111A发射，接着部分列第二发射子电极111B发射的方式，纹理检测模组均可以利用接收电极层120采集到从行方向发射的超声波聚焦后基于指纹反射回压电膜层，并由压电膜层对应产生的第一电压信号和从列方向发射超声波聚焦后基于指纹反射回压电膜层，并由压电膜层对应产生的第二电压信号，从而实现二维聚焦检测指纹，提高纹理检测的精确性。
进一步地，如图7所示，所述接收电极层120包括多个接收子电极121，其中，每一接收子电极121在所述压电膜层130上的正投影包含至少一个目标发射子电极111在所述压电膜层130上的正投影，且不包含其他发射子电极在所述压电膜层130上的正投影，所述目标发射子电极111和所述其他发射子电极均属于第一发射子电极111A或第二发射子电极111B，且所述其他 发射子电极为除所述目标发射子电极111之外的第一发射子电极111A或第二发射子电极111B。
本实施例中，每一第一发射子电极111A或每一第二发射子电极111B均有一个与之正对设置的接收子电极121。每一接收子电极121通过一根走线传输电压信号。
其中，接收子电极121的数量可以是第一发射子电极111A和第二发射子电极111B之和，这样可以每一接收子电极121与一个第一发射子电极111A或第二发射子电极111B一一正对设置，其中，接收子电极121的面积大于或等于第一发射子电极111A和第二发射子电极111B的面积。
但是，由于接收子电极121的数量较多导致走线也较多，走线设计困难。因此，可以通过一个接收子电极121与多个目标发射子电极111正对的方式来采集压电膜层130受到反射的超声波所产生的电压信号，以减少接收子电极121所连接的走线数量。
如图7所示，一个接收子电极121与3个目标发射子电极111正对，即一个接收子电极121在压电膜层130上的正投影包含三个目标发射子电极111在压电膜层130上的正投影，且不包含其他发射子电极在压电膜层130上的正投影。
本实施例中，上述每一组发射源激发压电膜层130发出的超声波经过纹理发射回压电膜层130后，均是接收电极层120整层接收压电膜层130经过压电效应产生的电信号。
进一步地，如图2所示，一行第二发射子电极111B位于相邻两行第一发射子电极111A之间，且一列第二发射子电极111B位于相邻两列第一发射子电极111A之间。
本实施例中，将每一行第二发射子电极111B设置于相邻两行第一发射子电极111A之间的间隙内，每一列第二发射子电极111B设置于相邻两列第一发射子电极111A之间的间隙内，实现在第一发射子电极111A内集成第二发射子电极111B。
这样，第一发射子电极111A和第二发射子电极111B能够针对同一区域分别进行从行方向激发超声波检测指纹和从列方向激发超声波检测指纹的效 果。
其中，如图2所示，在所述N和所述M大于等于2时，四个第一发射子电极111A包围一个第二发射子电极111B设置。
进一步地，所述第一发射子电极111A和所述第二发射子电极111B可以均为菱形(如图2所示)和中心对称的六边形(如图8a和图8b所示)。
进一步地，如图2所示，位于同一列的第一发射子电极111A互不相连，且位于同一行的第二发射子电极111B互不相连。
本实施例中，每一个发射子电极111只与一根第一发射信号线TX-H或第二发射信号线TX-V)连接，因此，第一发射子电极111A只会与其同一行的其他第一发射子电极111A同时为弦波信号，而不会与其同一列的其他第一发射子电极111A同时为弦波信号。同样的，第二发射子电极111B只会与其同一列的其他第二发射子电极111B同时为弦波信号，而不会与其同一行的其他第二发射子电极111B同时为弦波信号。
在一可选的实施方式中，如图9所示，所述第一发射信号线TX-H和所述第二发射信号线TX-V异层设置，所述发射电极层110还包括位于所述第一发射信号线和所述第二发射信号线之间的绝缘层140。
图9的剖视图为在第一发射信号线TX-H与第二发射信号线TX-V交叉处的剖视图，剖线平行于第一发射信号线TX-H的延伸方向。
本实施例中，第一发射信号线TX-H和第二发射信号线TX-V异层设置，在第一发射信号线TX-H和第二发射信号线TX-V的交叉区域，如图5所示，二者通过绝缘层140实现相互绝缘设置，以达到防止第一发射信号线TX-H的电信号与第二发射信号线TX-V的电信号相互干扰。
在另一可选的实施方式中，如图10所示，所述第一发射信号线TX-H包括第一部分910和第二部分920，所述第二发射信号线TX-V与所述第一部分910同层设置且位于相邻两个第一部分910之间；所述发射电极层110还包括覆盖所述第一部分910和所述第二发射信号线TX-V的绝缘层140，所述绝缘层140开设有过孔，所述第二部分920通过所述过孔连接相邻的两个第一部分910。
图10的剖视图为在第一发射信号线TX-H与第二发射信号线TX-V交叉 处的剖视图，剖线平行于第一发射信号线TX-H的延伸方向。
本实施例中，第一发射信号线TX-H的第一部分910和第二发射信号线TX-V同层设置，在第一发射信号线TX-H和第二发射信号线TX-V的交叉区域，如图10所示，第二发射信号线TX-V位于相邻两个第一部分910之间的间隙处，且与第一部分910间隔设置。
通过绝缘层140覆盖第一发射信号线TX-H的第一部分910和第二发射信号线TX-V，并利用第二部分920穿过绝缘层140中的过孔连接相邻两个第一部分910，实现相邻两个第一部分910在行方向上的信号传输。
进一步地，如图11所示，位于同一列的第一发射子电极111A与同一根第二发射信号线TX-V电连接，且位于同一行的第二发射子电极111B与同一根第一发射信号线TX-H电连接。
本实施例中，相同发射子电极111的数量下，在利用行方向的发射子电极111发射弦波信号的阶段内，除了可以利用原本N行第一发射子电极111A发射弦波信号之外，还能够利用X列第二发射子电极111B也发射弦波信号；同样的，在利用列方向的发射子电极111发射弦波信号的阶段内，除了可以利用原本Y列第二发射子电极111B发射弦波信号之外，还能够利用M列第一发射子电极111A也发射弦波信号。
这样，能够通过增加超声波反射数据量的方式来进一步增加指纹识别的精确性。
本公开实施例还提供了一种显示装置，包括如上所述的纹理检测模组。
显示装置可以是显示器、手机、平板电脑、电视机、可穿戴电子设备、导航显示设备等。
本公开实施例还提供了一种纹理检测模组的控制方法，所述方法包括：
在第一时间段，分别控制多个第一发射组发射弦波信号，并获取所述接收电极采集的所述压电膜层产生的第一电压信号，其中，每个第一发射组包括至少两行第一发射子电极；
在第二时间段，分别控制多个第二发射组发射弦波信号，并获取所述接收电极采集的所述压电膜层产生的第二电压信号，其中，所述第一时间段和所述第二时间段不重合，每个第二发射组包括至少两列第二发射子电极；
基于所述第一电压信号和所述第二电压信号确定指纹信息。
本公开实施例中，通过N行第一发射子电极向压电膜层提供弦波信号，激发压电膜层发出行方向的超声波，从而使接收电极层能够从压电膜层采集到对应行方向的纹理电信号；又通过Y列第二发射子电极向压电膜层提供弦波信号，激发压电膜层发出列方向的超声波，从而使接收电极层能够从压电膜层采集到对应列方向的纹理电信号；结合两个方向的纹理电信号识别纹理，能够提高对纹理的识别精度。因此，本公开提供的技术方案能够提高对纹理的识别精度。
如图1和图2所示，上述发射电极层110、压电膜层130和接收电极层120依次叠设，压电膜层130分别与发射电极层110和接收电极层120接触。
在指纹检测过程中包括发射过程和接收过程：
在发射过程中，发射电极层110为高压弦波信号，接收电极层120为固定电压信号，此时，压电膜层130由于受到发射电极111中高压弦波信号的激发产生逆压电效应，向外发射超声波，发射的超声波接触到用户手指后会发射回压电膜层130。其中，反射回的超声波由于用户手指的不同，指纹的谷位置和脊位置也不同，因此反射回的超声波的震动强度也会有差异。具体的，从谷位置反射回的超声波的震动强度大于从脊位置反射回的超声波的震动强度；
在接收过程中，将发射电极层110从高压弦波信号切换为固定电压信号，从而压电膜层130接收到反射回的超声波，产生压电效应，在接收电极层120上产生与震动强度对应的交流电压信号，通过该交流电压信号识别指纹的谷位置和脊位置，从而识别指纹。
另外，如图1所示，还可以在发射电极层110远离压电膜层130的一侧设置一层反射层140，用于反射压电膜层130发出的超声波，以提高压电膜层130发出的超声波与手指发生反射的利用率。其中，反射层140与发射电极层110之间可以设置绝缘层，也可以不设置绝缘层能，此处不作限定。发射层140可以采用银材料制成。
上述第一电压信号是利用接收电极层120采集到压电膜层从行方向发射的超声波聚焦后基于指纹反射回压电膜层，并由压电膜层对应产生的电压信 号；上述第二电压信号是利用接收电极层120采集到压电膜层从列方向发射超声波聚焦后基于指纹反射回压电膜层，并由压电膜层对应产生的电压信号。
本公开实施例中，上述发射电极层110被切割为呈N行M列排布的第一发射子电极111A和呈X行Y列排布的第二发射子电极111B，其中，第一发射信号线TX-H用于为N行第一发射子电极111A提供电信号，第二发射信号线TX-V用于为Y列第二发射子电极111B提供电信号，即第一发射子电极111A全部可以用于行方向对指纹的检测，第二发射子电极111B全部可以用于列方向对指纹的检测。
上述第一发射信号线TX-H的数量包括N根，每一根第一发射信号线TX-H与一行第一发射子电极111A连接；上述第二发射信号线TX-V的数量包括Y根，每一根第二发射信号线TX-V与一列第二发射子电极111B连接。
本公开实施例在指纹检测过程中，可以是利用N行第一发射子电极111A使压电膜层130发出超声波，且接收电极层120完成指纹对应的交流电压信号的采集后，才利用Y列第二发射子电极111B使压电膜层130发出超声波；或者，也可以顺序调换；或者，还可以利用P行第一发射子电极111A使压电膜层130发出超声波，待接收电极层120完成指纹对应的交流电压信号的采集后，再利用Q列第二发射子电极111B使压电膜层130发出超声波，待接收电极层120完成指纹对应的交流电压信号的采集后，再重新利用剩余行第一发射子电极111A使压电膜层130发出超声波，待接收电极层120完成指纹对应的交流电压信号的采集后，再利用剩余列第二发射子电极111B使压电膜层130发出超声波，此处不作限定。上述P为小于N的正整数，上述Q为小于Y的正整数。
进一步地，每一第一发射组发射弦波信号的步骤，包括：
分别控制至少两根第一信号发射线输出弦波信号，使得至少两行第一发射子电极发射的弦波信号聚焦；
每一第二发射组发射弦波信号的步骤，包括：
分别控制至少两根第二信号发射线输出弦波信号，使得至少两列第二发射子电极发射的弦波信号聚焦。
本实施例采用超声波聚焦的方式进行指纹的检测，具体的，以利用N行 第一发射子电极111A使压电膜层130发出超声波为例进行说明：可以将连续的至少2行第一发射子电极111A作为一组发射源，通过控制发射源内各行第一发射子电极111A弦波信号的相位(即激发压电膜层130发射超声波的时间点)，从而使发射源中各行第一发射子电极111A发出的超声波聚焦与一处。
例如：如图3所示，一组发射源包括3行第一发射子电极111A，分别为第三发射子电极1113和分设于第三发射子电极1113相对两侧的第四发射子电极1114和第五发射子电极1115，第三发射子电极1113、第四发射子电极1114和第五发射子电极1115均属于第一发射子电极111A。
其中，控制第四发射子电极1114和第五发射子电极1115同时发出第一弦波信号，激发压电膜层130发出超声波，在第四发射子电极1114和第五发射子电极1115发出第一弦波信号后的预设时间点控制第三发射子电极1113再发出第二弦波信号，激发压电膜层130发出超声波，从而能够使得这3行第一发射子电极111A发出的弦波信号所激发的超声波在第三发射子电极1113的正上方聚焦(即聚焦位置在发射电极层110上的正投影位于第三发射子电极内)，能量增大，提高超声波传输的方向性，进而达到提高对指纹检测精度的效果。
上述第四发射子电极1114和第五发射子电极1115发出第一弦波信号的时间点与第三发射子电极1113发出第二弦波信号的时间点之间的时间差即为第四发射子电极1114和第五发射子电极1115中第一弦波信号与第三发射子电极1113中第二弦波信号之间的相位差。该时间差可以根据各第一个发射子电极111A与预设聚焦点的距离之间的距离差计算得到。
需要说明的是，一组发射源还可以是4行第一发射子电极111A、6行第一发射子电极111A、7行第一发射子电极111A等等，此处不作限定。
其中，两组发射源可以相互独立，即没有共用的一行发射子电极111A；也可以部分重合，即共用至少一行发射子电极，例如：如图3所示，下一组发射源包括前一组发射源的第三发射子电极1113和第五发射子电极1115、以及新的第六发射子电极1116。第三发射子电极1113、第五发射子电极1115和第六发射子电极1116均属于第一发射子电极111A。
另外，利用N行第一发射子电极111A使压电膜层130发出超声波可以 是多组发射源分时发出弦波信号激发压电膜层发出超声波，也可以是至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波，以达到减少指纹检测时长的效果。
以至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波为例，如图4所示，N行第一发射子电极111A首尾两端的两个发射源同时发出弦波信号激发压电膜层发出超声波，从而能够缩短一半指纹检测的时长。
以利用Y列第二发射子电极111B发出弦波信号激发压电膜层发出超声波为例进行说明：可以将连续的至少2列第二发射子电极111B作为一组发射源，通过控制发射源内各列第二发射子电极111B弦波信号的相位(即激发压电膜层130发射超声波的时间点)，从而使发射源中各列第二发射子电极111B发出的弦波信号激发压电膜层发出的超声波聚焦与一处。
例如：如图5所示，一组发射源包括2列第二发射子电极111B，分别为第七发射子电极1117和第八发射子电极1118，第七发射子电极1117和第八发射子电极1118均属于第二发射子电极111B。
其中，控制第七发射子电极1117和第八发射子电极1118同时发出弦波信号激发压电膜层发出超声波，从而能够使得这2列第二发射子电极111B发出的弦波信号激发压电膜层发出的超声波在第七发射子电极1117和第八发射子电极1118之间间隙的正上方聚焦，能量增大，提高超声波传输的方向性，进而达到提高对指纹检测精度的效果。
需要说明的是，一组发射源还可以是4列第二发射子电极111B、6列第二发射子电极111B、7列第二发射子电极111B等等，此处不作限定。
其中，两组发射源可以相互独立，即没有共用的一列第二发射子电极111B；也可以部分重合，即共用至少一列第二发射子电极111B，例如：如图5所示，下一组发射源包括前一组发射源的第八发射子电极1118和新的第九发射子电极1119。第八发射子电极1118和第九发射子电极1119均属于第二发射子电极111B。
另外，利用Y列第二发射子电极111B使压电膜层130发出超声波可以是多组发射源分时发出弦波信号激发压电膜层发出超声波，也可以是至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波，达到减少 指纹检测时长的效果。
以至少两组相互独立的发射源同时发出弦波信号激发压电膜层发出超声波为例，如图6所示，Y列第二发射子电极111B首尾两端的两个发射源同时发出弦波信号激发压电膜层发出超声波，从而能够缩短一半指纹检测的时长。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
上面结合附图对本公开的实施例进行了描述，但是本公开并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本公开的启示下，在不脱离本公开宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本公开的保护之内。

Claims (17)

  1. 一种纹理检测模组，包括：发射电极层、接收电极层以及位于所述发射电极层和所述接收电极层之间的压电膜层；所述发射电极层包括发射电极、第一发射信号线和第二发射信号线，其中，所述发射电极包括相互绝缘设置的第一发射子电极和第二发射子电极；
    多个第一发射子电极呈N行M列排布，位于同一行的第一发射子电极均与同一根第一发射信号线电连接，所述N和所述M均为正整数；
    多个第二发射子电极呈X行Y列排布，位于同一列的第二发射子电极均与同一根第二发射信号线电连接，所述X和所述Y均为正整数。
  2. 根据权利要求1所述的纹理检测模组，其中，一行第二发射子电极位于相邻两行第一发射子电极之间，且一列第二发射子电极位于相邻两列第一发射子电极之间。
  3. 根据权利要求2所述的纹理检测模组，其中，所述N和所述M大于等于2，四个第一发射子电极包围一个第二发射子电极设置。
  4. 根据权利要求2所述的纹理检测模组，其中，位于同一列的第一发射子电极互不相连，且位于同一行的第二发射子电极互不相连。
  5. 根据权利要求4所述的纹理检测模组，其中，所述第一发射信号线和所述第二发射信号线异层设置，所述发射电极层还包括位于所述第一发射信号线和所述第二发射信号线之间的绝缘层。
  6. 根据权利要求4所述的纹理检测模组，其中，所述第一发射信号线包括第一部分和第二部分；所述第二发射信号线与所述第一部分同层设置且位于相邻两个第一部分之间；所述发射电极层还包括覆盖所述第一部分和所述第二发射信号线的绝缘层，所述绝缘层开设有过孔，所述第二部分通过所述过孔连接相邻的两个第一部分。
  7. 根据权利要求2所述的纹理检测模组，其中，所述第一发射子电极和所述第二发射子电极均为菱形或中心对称的六边形。
  8. 根据权利要求1所述的纹理检测模组，其中，位于同一列的第一发射子电极与同一根第二发射信号线电连接，且位于同一行的第二发射子电极与 同一根第一发射信号线电连接。
  9. 根据权利要求1-8中任一项所述的纹理检测模组，其中，所述接收电极层包括多个接收子电极，其中，每一接收子电极在所述压电膜层上的正投影包含至少一个目标发射子电极在所述压电膜层上的正投影，且不包含其他发射子电极在所述压电膜层上的正投影，所述目标发射子电极和所述其他发射子电极均属于第一发射子电极或第二发射子电极，且所述其他发射子电极为除所述目标发射子电极之外的第一发射子电极或第二发射子电极。
  10. 根据权利要求9所述的纹理检测模组，其中，每一所述第一发射子电极或每一所述第二发射子电极均有一个与之正对设置的接收子电极；每一所述接收子电极通过一根走线传输电压信号。
  11. 根据权利要求9所述的纹理检测模组，其中，每一所述接收子电极与多个所述目标发射子电极正对设置。
  12. 根据权利要求1所述的纹理检测模组，其中，位于同一行的第一发射子电极均位于同一第一直线上；位于同一列的第二发射子电极均位于同一第二直线上。
  13. 根据权利要求12所述的纹理检测模组，其中，所述第一直线垂直于所述第二直线。
  14. 一种显示装置，包括如权利要求1-13中任一项所述的纹理检测模组。
  15. 一种纹理检测模组的控制方法，应用于如权利要求1-13中任一项所述的纹理检测模组，所述方法包括：
    在第一时间段，分别控制多个第一发射组发射弦波信号，并获取所述接收电极采集的所述压电膜层产生的第一电压信号，其中，每个第一发射组包括至少两行第一发射子电极；
    在第二时间段，分别控制多个第二发射组发射弦波信号，并获取所述接收电极采集的所述压电膜层产生的第二电压信号，其中，所述第一时间段和所述第二时间段不重合，每个第二发射组包括至少两列第二发射子电极；
    基于所述第一电压信号和所述第二电压信号确定指纹信息。
  16. 根据权利要求15所述的方法，其中，应用于如权利要求3所述的纹理检测模组；每一第一发射组发射弦波信号的步骤，包括：
    分别控制至少两根第一信号发射线输出弦波信号，使得至少两行第一发射子电极发射的弦波信号聚焦；
    每一第二发射组发射弦波信号的步骤，包括：
    分别控制至少两根第二信号发射线输出弦波信号，使得至少两列第二发射子电极发射的弦波信号聚焦。
  17. 根据权利要求16所述的方法，其中，第一发射组包括第三发射子电极、以及分设于所述第三发射子电极相对两侧的第四发射子电极和第五发射子电极，所述第三发射子电极、所述第四发射子电极和所述第五发射子电极均属于第一发射子电极；
    所述分别控制至少两根第一信号发射线输出弦波信号，使得至少两行第一发射子电极发射的弦波信号聚焦的步骤，包括：
    控制所述第四发射子电极和所述第五发射子电极同时发出第一弦波信号；
    在所述第四发射子电极和所述第五发射子电极发出第一弦波信号后的预设时间点，控制所述第三发射子电极发出第二弦波信号，使得所述第一弦波信号和所述第二弦波信号在目标位置聚焦，所述目标位置在所述发射电极层的正投影位于所述第三发射子电极内。
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