CN113486831A - Display module and electronic equipment - Google Patents
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- CN113486831A CN113486831A CN202110799623.XA CN202110799623A CN113486831A CN 113486831 A CN113486831 A CN 113486831A CN 202110799623 A CN202110799623 A CN 202110799623A CN 113486831 A CN113486831 A CN 113486831A
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- 230000008093 supporting effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
The application discloses a display module and electronic equipment, which belong to the field of communication equipment, wherein the display module comprises an acoustic-electric conversion layer, a plurality of first electrodes and a plurality of third electrodes, wherein the first electrodes and the third electrodes are arranged on the first side of the acoustic-electric conversion layer at intervals, the second side of the acoustic-electric conversion layer, which is far away from the first electrodes, is provided with a plurality of second electrodes at intervals, and one first electrode or one third electrode is opposite to at least two second electrodes; the display module is provided with a touch mode and an ultrasonic mode, in the touch mode, the first electrode is a driving electrode, the third electrode is a receiving electrode, and the first electrode and the third electrode are used for detecting a touch capacitor; in the ultrasonic mode, the first electrode and/or the third electrode correspondingly provided with the second electrode are/is a driving electrode, the second electrode is used as a receiving electrode, the driving electrode drives the sound-electricity conversion layer to generate ultrasonic waves, and the receiving electrode receives the reflected ultrasonic waves. The thickness of above-mentioned display module assembly that possesses fingerprint identification function is less relatively.
Description
Technical Field
The application belongs to the technical field of communication equipment, and particularly relates to a display module and electronic equipment.
Background
As technology advances, more and more technology is applied to electronic devices. For example, compared to the prior art that the electronic device needs to separately arrange the fingerprint identification module outside the display screen, the fingerprint identification module is arranged in the area where the display screen is located in the related art. However, in the present combination scheme of display screen and fingerprint identification module, the fingerprint identification module sets up the below at the display screen, and this whole thickness that leads to electronic equipment is great relatively.
Disclosure of Invention
The embodiment of the application aims to provide a display module and electronic equipment so as to solve the problem that the whole thickness of the electronic equipment is relatively large due to the fact that the fingerprint identification module and the display screen in the existing electronic equipment are stacked.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, embodiments of the present application disclose a display module, which includes an acoustic-electric conversion layer, a plurality of first electrodes, and a plurality of third electrodes,
the first electrodes and the third electrodes are arranged on the first side of the sound-electricity conversion layer at intervals, a plurality of second electrodes are arranged on the second side of the sound-electricity conversion layer, which is far away from the first electrodes, at intervals, and one first electrode or one third electrode is opposite to at least two second electrodes;
the display module has a touch mode and an ultrasonic mode, wherein,
in the touch mode, the first electrode is a driving electrode, the third electrode is a receiving electrode, and the first electrode and the third electrode are used for detecting a touch capacitance;
in the ultrasonic mode, the first electrode and/or the third electrode correspondingly provided with the second electrode are/is a driving electrode, the second electrode is used as a receiving electrode, the driving electrode drives the sound-electricity conversion layer to generate ultrasonic waves, and the receiving electrode receives the reflected ultrasonic waves.
In a second aspect, an embodiment of the present application discloses an electronic device, which includes the above display module.
The embodiment of the application discloses a display module assembly, it includes acoustic-electric conversion layer, a plurality of first electrodes and a plurality of third electrodes, first electrode and third electrode all set up in the same one side of acoustic-electric conversion layer, and the side of acoustic-electric conversion layer deviating from first electrode place is provided with a plurality of second electrodes, and a first electrode or a third electrode is relative with two at least second electrodes. The first electrode and/or the third electrode which is correspondingly provided with the second electrode in the display module is used as a driving electrode to drive the sound-electricity conversion layer to generate ultrasonic waves, and the second electrode is used as a receiving electrode to receive reflected ultrasonic waves and act on the sound-electricity conversion layer to generate an electric signal of the sound-electricity conversion layer, so that the display module has an ultrasonic mode and can provide a fingerprint identification function for the display module; meanwhile, the first electrode in the display module is used as a driving electrode, the third electrode is used as a receiving electrode, and the first electrode and the third electrode can detect touch capacitance, so that the display module also has a touch mode. Therefore, the display module has the touch function and the ultrasonic function, and the structure for providing the ultrasonic identification function is multiplexed to the touch function, so that the display module does not need to be separately provided with the fingerprint identification module, the whole thickness of the display module with the fingerprint identification function is relatively small, and finally the whole thickness of the electronic equipment is relatively small.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic cross-sectional view of a display module according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional view illustrating another display module according to an embodiment of the disclosure;
fig. 3 is a schematic distribution diagram of a first electrode, a second electrode and a third electrode in a display module disclosed in an embodiment of the present application;
FIG. 4 is a schematic view illustrating a distribution of second electrodes in the display module disclosed in the embodiment of the present application;
fig. 5 is a schematic assembly diagram of a first electrode and a third electrode in a display module disclosed in an embodiment of the present application;
FIG. 6 is a schematic cross-sectional view illustrating a portion of a display module including a bridging structure according to an embodiment of the disclosure;
fig. 7 is a schematic view illustrating a working principle of an acoustic wave reflective cavity in a display module according to an embodiment of the disclosure.
Description of reference numerals:
a 100-acousto-electric conversion layer, a 110-sub conversion layer,
310-a first electrode, 320-a second electrode, 330-a third electrode,
500-bridge structure, 510-first conductive member, 520-second conductive member, 530-insulating member,
710-middle frame, 720-foam, 730-acoustic wave reflection cavity.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The folding mechanism and the electronic device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
As shown in fig. 1 to 7, an embodiment of the present application discloses a display module, which can be applied in an electronic device, and includes an acoustic-electric conversion layer 100, a plurality of first electrodes 310, and a plurality of third electrodes 330. In addition, the outside of display module assembly can also be provided with parts such as bubble cotton 720, for whole display module assembly provides the damping effect, promotes display module assembly's use reliability.
The sound-electricity conversion layer 100 is made of a material having a capability of converting a sound signal and an electric signal into each other, and the thickness and other dimensions thereof can be determined according to actual requirements. Alternatively, the sound-electricity conversion layer 100 is made of a piezoelectric material, and when the sound-electricity conversion layer 100 is affected by an electric signal, it may generate a sound wave through an inverse piezoelectric effect, and accordingly, when the sound-electricity conversion layer 100 is affected by the sound wave, it may generate an electric signal through a positive piezoelectric effect, thereby implementing mutual conversion between the sound signal and the electric signal. Of course, the sound-electricity conversion layer 100 may be formed by using other materials having the above-mentioned capabilities, which are not listed here.
Each first electrode 310 and each third electrode 330 are disposed on the first side of the sound-to-electricity conversion layer 100, and each first electrode 310 is spaced from each other, each third electrode 330 is spaced from each other, and correspondingly, each adjacent first electrode 310 and each adjacent third electrode 330 are also spaced from each other, so that any two adjacent first electrodes 310 are insulated from each other, any two adjacent third electrodes 330 are also insulated from each other, and any adjacent first electrode 310 and each adjacent third electrode 330 are insulated from each other, thereby ensuring that each first electrode 310 and each third electrode 330 can work independently. Accordingly, in the wiring process, each of the first electrodes 310 and each of the third electrodes 330 need to be connected to an independent cable, so as to ensure that the first electrodes 310 and the third electrodes 330 are insulated from each other, and the first electrodes 310 and the third electrodes 330 having the above structure can form a touch unit, thereby providing a touch function for the display module by means of the first electrodes 310 and the third electrodes 330.
Specifically, the shape and size of the first electrode 310 and the third electrode 330 may be determined according to actual requirements, and are not limited herein. The first electrode 310 and the third electrode 330 may be fixedly connected to the first side of the sound-to-electricity conversion layer 100 by means of bonding with a conductive adhesive, so as to ensure that the connection reliability between the first electrode 310 and the third electrode 330 and the sound-to-electricity conversion layer 100 is relatively high, and enable the first electrode 310 and the third electrode 330 to emit electrical signals to the sound-to-electricity conversion layer 100. In addition, in order to ensure that the first electrode 310 and the third electrode 330 can form a touch unit, in the process of connecting the first electrode 310 and the third electrode 330, the electrical connection directions of the first electrode 310 and the third electrode 330 are also required to be perpendicular to each other, and the first electrode 310 and the third electrode 330 are both arranged on the same side of the sound-to-electricity conversion layer 100, so that the first electrode 310 and the third electrode 330 can be ensured not to be stacked on each other, which enables the first electrode 310 and the third electrode 330 to be a basis of the touch unit, so that when a user touches the display module, the capacitance between the corresponding first electrode 310 and the corresponding third electrode 330 can be changed, and the position where the capacitance is changed can be detected by means of a detection circuit and the like, thereby achieving the purpose of identifying the touch position.
In order to make the display module further have the ultrasonic recognition capability, the second side of the sound-electricity conversion layer 100 away from the first electrode 310 is further provided with a plurality of second electrodes 320, the plurality of second electrodes 320 are spaced from each other, so that the second electrodes 320 are insulated from each other, and it is ensured that each second electrode 320 can independently output an electrical signal. In the process of disposing the second electrodes 320, one first electrode 310 or one third electrode 330 may be directly opposite to at least two second electrodes 320. That is, at least two second electrodes 320 are a group, and the group of second electrodes 320 as a whole is disposed either opposite to one first electrode 310 or opposite to one third electrode 330. Alternatively, of the first electrode 310 and the third electrode 330, the second electrode 320 may be only the first electrode 310 or only the third electrode 330, in other words, the second electrodes 320 are grouped into at least one group, and the second electrodes 320 of all the groups may be respectively disposed corresponding to the first electrode 310, or the second electrodes 320 of all the groups may be respectively disposed corresponding to the third electrode 330. In another embodiment of the present application, the plurality of second electrodes 320 may be divided into a plurality of groups, and at least one group of second electrodes 320 is disposed corresponding to the first electrode 310, and at least one group of second electrodes 320 is disposed corresponding to the third electrode 330. Of course, the number of the second electrodes 320 in each group may be the same or different.
The second electrode 320 is disposed on the second side of the sound-electricity conversion layer 100, so that the two opposite sides of the sound-electricity conversion layer 100 are both provided with electrodes, and thus the first electrode 310 and the third electrode 330 on the first side of the sound-electricity conversion layer 100 can both be used as driving electrodes to output an electrical signal to the sound-electricity conversion layer 100, so that the sound-electricity conversion layer 100 vibrates to generate sound waves, and the second electrode 320 on the second side can be used as a receiving electrode to receive the reflected sound waves, which act on the sound-electricity conversion layer 100 to generate an electrical signal of the sound-electricity conversion layer 100, so that the display module has an ultrasonic recognition capability. Of course, in the process of performing the ultrasonic recognition on the display module, it is usually necessary to detect specific parameters of the electrical signals received by the receiving electrodes by means of other devices, and since the energies of the reflected waves of the sound waves reflected at the fingerprint valleys and fingerprint ridges of the user's finger are different, and then the voltages of the electrical signals generated by the sound-to-electricity conversion layer 100 are different due to the different reflected waves, the detection is performed based on the voltages of the electrical signals received by the different second electrodes 320, so that the display module also has the capability of ultrasonic recognition.
Based on the display module, the display module has a touch mode and an ultrasonic mode, wherein,
in the touch mode, the first electrode 310 is a driving electrode, the third electrode 330 is a receiving electrode, and the first electrode 310 and the third electrode 330 can detect a touch capacitance. As described above, the first electrode 310 and the third electrode 330 are insulated from each other, and the electrical connection directions of the first electrode 310 and the third electrode 330 are perpendicular to each other, in this case, the first electrode 310 is a driving electrode, the third electrode 330 is a receiving electrode, and each second electrode 320 is suspended or a determined voltage, so that the capacitance between the first electrode 310 and the third electrode 330 can be changed when the display module is touched by a living body, and a specific position where the capacitance in the display module is changed can be obtained under the action of the detection circuit, thereby realizing detection and identification of the touch position.
In the ultrasonic mode, the first electrode 310 and/or the third electrode 330, on which the second electrode 320 is correspondingly disposed, are driving electrodes, and the second electrode 320 is a receiving electrode. Specifically, as described above, the second electrode 320 may be provided corresponding to only the first electrode 310 (or the third electrode 330), or the second electrode 320 may be provided corresponding to both the first electrode 310 and the third electrode 330. In this mode, only the first electrode 310 and/or the third electrode 330, on which the second electrode 320 is correspondingly disposed, serves as a driving electrode may enable the second electrode 320, which serves as a receiving electrode, to receive a corresponding electrical signal. Therefore, in this embodiment, if one first electrode 310 (or third electrode 330) is not provided with a corresponding second electrode 320, the first electrode 310 (or third electrode 330) may not be used as a driving electrode, which may save power, and on the other hand, may prevent the receiving accuracy of the second electrode 320 as a receiving electrode from being adversely affected by the first electrode 310 (or third electrode 330) not corresponding to the second electrode 320 operating as a driving electrode.
In the ultrasonic mode, the driving electrode can drive the sound-electricity conversion layer 100 to generate ultrasonic waves when being powered on, the ultrasonic waves generated by the sound-electricity conversion layer 100 are shielded by an object or a living body and then reflected, the reflected ultrasonic waves act on the sound-electricity conversion layer 100, so that electric signals are generated in a corresponding area on the sound-electricity conversion layer 100, correspondingly, the second electrode 320 serving as a receiving electrode can receive the electric signals generated by the sound-electricity conversion layer 100, and the display module is provided with the ultrasonic mode. As described above, by using another device such as a detection circuit, the electric signals received by the second electrodes 320 can be identified, and the purpose of identifying the ultrasonic waves can be achieved.
The embodiment of the application discloses a display module, which comprises an acoustic-electric conversion layer 100, a plurality of first electrodes 310 and a plurality of third electrodes 330, wherein the first electrodes 310 and the third electrodes 330 are arranged on the same side of the acoustic-electric conversion layer 100, a plurality of second electrodes 320 are arranged on the side of the acoustic-electric conversion layer 100 departing from the first electrodes 310, and one first electrode 310 or one third electrode 330 is opposite to at least two second electrodes 320. Moreover, the first electrode 310 and/or the third electrode 330, which are correspondingly provided with the second electrode 320, in the display module are/is used as a driving electrode to drive the sound-electricity conversion layer 100 to generate ultrasonic waves, and the second electrode 320 is used as a receiving electrode to receive reflected ultrasonic waves, so that the reflected ultrasonic waves act on the sound-electricity conversion layer 100 to generate an electric signal of the sound-electricity conversion layer 100, and the display module is enabled to have an ultrasonic mode and provide a fingerprint identification function for the display module; meanwhile, the first electrode 310 and the third electrode 330 in the display module are capable of detecting a touch capacitance by using the first electrode 310 as a driving electrode and the third electrode 330 as a receiving electrode, so that the display module also has a touch mode. Therefore, the display module has the touch function and the ultrasonic function, and the structure for providing the ultrasonic identification function is multiplexed to the touch function, so that the display module does not need to be separately provided with the fingerprint identification module, the whole thickness of the display module with the fingerprint identification function is relatively small, and finally the whole thickness of the electronic equipment is relatively small.
As described above, the display module may be applied to an electronic device, and in the process of installing the display module, the display may be installed on the middle frame 710 of the electronic device, where the middle frame 710 is an installation infrastructure for carrying devices inside the electronic device in the electronic device, such as devices such as a battery and a chip of the electronic device, and both of the devices may be supported and installed on the middle frame 710. Correspondingly, the display module can also be carried on the middle frame 710, thereby ensuring that the display module has higher installation stability. Optionally, the display module is attached to the middle frame 710, and in this case, the installation stability of the display module can be improved to some extent. In addition, when the technical scheme is adopted, materials such as foam can be arranged between the display module and the middle frame 710, so that a certain avoiding space is provided for the vibration of the sound-electricity conversion layer 100 through the materials such as the foam, and the sound-electricity conversion layer 100 is ensured not to generate adverse effects on other components in the display module in the process of electrifying vibration.
In another embodiment of the present application, a certain gap may be formed between the display module and the middle frame 710, so as to form the sound wave reflection cavity 730 by using the gap, the size of the sound wave reflection cavity 730 in the thickness direction of the display module may be determined according to actual conditions, and is not limited here, and any position of the sound wave reflection cavity 730 may be substantially consistent in the size in the thickness direction of the display module as much as possible, so as to ensure that the reflection conditions of the ultrasonic waves generated at various places on the sound-electricity conversion layer 100 are substantially the same, reduce the difficulty in the ultrasonic identification process, and further improve the precision of the ultrasonic identification work.
Specifically, the first electrode 310 and the third electrode 330 may be disposed between the acoustic-electric conversion layer 100 and the middle frame 710, and correspondingly, the second electrode 320 is disposed on a side of the acoustic-electric conversion layer 100 facing away from the middle frame 710, in which case, along the thickness direction of the acoustic-electric conversion layer 100, the first electrode 310 and the third electrode 330 and the middle frame 710 form the acoustic wave reflection cavity 730.
The sound wave reflection cavity 730 is formed between the display module and the middle frame 710, so that the sound-electricity conversion layer 100 has a certain vibration space, and the reliability of the sound-electricity conversion layer 100 is improved. Moreover, since the electric signal emitted by the driving electrode is a pulse signal, the emission direction of the ultrasonic wave generated by the sound-to-electricity conversion layer 100 also includes two opposite directions, namely, a first direction facing the display surface of the display module and a second direction departing from the display surface of the display module. The ultrasonic waves propagating along the first direction can be directly emitted to the direction of the display surface, and the ultrasonic waves propagating along the second direction cannot reach the display surface. By disposing the acoustic wave reflective cavity 730 between the display module and the middle frame 710, a portion of the acoustic wave generated by the sound-electricity converting layer 100, which propagates along the second direction and in the direction close to the middle frame 710, can also be reflected on the surface of the middle frame 710 within the acoustic wave reflective cavity 730, and finally, the reflected portion is directed to the direction of the display surface of the display module. Furthermore, by adopting the technical scheme, the reflection amount of the ultrasonic wave can be increased in the ultrasonic mode, so that the amount of the electric signals which can be received by the receiving electrode is increased, and finally the purpose of improving the ultrasonic identification precision is achieved.
Certainly, under the condition that the sound wave reflecting cavity 730 is arranged between the display module and the middle frame 710, a supporting structure is required to be arranged between the display module and the middle frame 710, and particularly, a plurality of supporting blocks and other supporting structures can be dispersedly arranged at a plurality of positions between the display module and the middle frame 710, so that a reliable supporting function is provided for the display module under the condition that the covering area of the sound wave reflecting cavity 730 is influenced as little as possible. Optionally, the supporting structure may be a portion included in the display module, or may be a portion outside the display module.
As described above, the first electrode 310 and the third electrode 330 are disposed on the same side of the acoustic-electric conversion layer 100, and the plurality of first electrodes 310 are spaced apart from each other and the plurality of third electrodes 330 are spaced apart from each other. Alternatively, in the process of arranging the first electrode 310 and the third electrode 330, the first electrode 310 and the third electrode 330 may be alternately arranged. More specifically, the first electrode 310 and the third electrode 330 may have a circular shape, which may ensure that the first electrode 310 and the third electrode 330 have mutually perpendicular electrical connection directions. In another embodiment of the present application, the first electrode 310 and the third electrode 330 are each square with equal dimensions. In this case, the gap between the first electrode 310 and the third electrode 330 may be relatively small, so that the touch accuracy of the display module may be improved. In the above embodiment, the corners of the adjacent first electrodes 310 are connected to each other, and the corners of the adjacent third electrodes 330 are connected to each other, so that the first electrodes 310 and the third electrodes 330 are electrically connected in the direction perpendicular to each other.
Alternatively, the display module may include an insulating member 530, and any two adjacent first electrodes 310 are connected by a first conductive member 510, any two adjacent third electrodes 330 are connected by a second conductive member 520, the second conductive member 520 is located at one side of the first conductive member 510, and the third electrodes 330 and the second conductive member 520 are both insulated from the first conductive member 510 by the insulating member 530.
Specifically, the first conductive member 510 and the second conductive member 520 may be conductive wires, each of the first electrode 310 and the third electrode 330 may be a separate metal block in the process of forming and connecting the first electrode 310 and the third electrode 330, then the plurality of first electrodes 310 located in the same row may be connected together by the conductive wires, correspondingly, the third electrodes 330 located in the same column may be connected together by other conductive wires, so that the electrical connection direction of the first electrode 310 and the third electrode 330 is perpendicular, and then the plurality of first electrodes 310 and the plurality of third electrodes 330 may be collectively bonded to the same side of the sound-to-electricity conversion layer 100 by the conductive adhesive. Of course, in order to ensure mutual insulation between the first electrode 310 and the third electrode 330, an insulating member 530 may be disposed between a wire connected to the first electrode 310 and a wire connected to the third electrode 330, and the insulating member 530 may include air. In order to further improve the insulation effect between the two, the insulation member 530 may be made of an insulation material such as foam or plastic. In the above embodiment, the lead wire connected to the first electrode 310 and the lead wire connected to the third electrode 330, and the insulating member 530 therebetween may be accommodated in the space formed between the adjacent first electrode 310 and the third electrode 330, so that the second conductive member 520 is positioned at one side of the first conductive member 510.
In another embodiment of the present application, in order to reduce the processing difficulty of the first electrode 310 and the third electrode 330 and improve the processing efficiency, the first electrode 310 and the third electrode 330 may be formed by dividing a single metal structure, and during the dividing process, a portion between any two adjacent first electrodes 310 is reserved to use the portion as the first conductive member 510 connecting the two adjacent first electrodes 310. In this case, the size of the first conductive member 510 is equal to the size of the first electrode 310 in the thickness direction of the acoustic-electric conversion layer 100. Obviously, since any first conductive member 510 is located between two adjacent first electrodes 310, the two adjacent first electrodes 310 in the divided structure are in a connected state, on one hand, the process of connecting the first electrodes 310 is omitted, and on the other hand, the workload of the dividing operation is reduced.
Meanwhile, in the above embodiment, the purpose of connecting the two adjacent third electrodes 330 may be achieved by additionally disposing the second conductive member 520. In order to ensure that the third electrodes 330 and the first electrode 310 can still be insulated from each other while the two third electrodes 330 are connected by the second conductive member 520, the second conductive member 520 may be disposed on a side of the first electrode 310 away from the sound-to-electricity conversion layer 100, that is, the second conductive member 520 is located outside a space sandwiched between two adjacent third electrodes 330. Moreover, as described above, the display module may include the insulating member 530, and further, the third electrode 330 and the second conductive member 520 may be insulated from the first conductive member 510 by the insulating member 530, so that the insulating relationship between the third electrode 330 and the first electrode 310 may not be damaged while the adjacent third electrodes 330 may be electrically connected by the second conductive member 520.
Specifically, any one of the second conductive members 520 may be fixed and electrically connected between two adjacent third electrodes 330 by welding or the like. Of course, the second conductive member 520 may also be adhered and fixed between two adjacent third electrodes 330 by means of a conductive adhesive. The insulating member 530 may be a plastic block, which may be interposed between the first conductive member 510 and the second conductive member 520, so as to ensure that the first conductive member 510 and the second conductive member 520 are insulated from each other. Further, a receiving groove may be provided in the middle of the insulating member 530, and the first conductive member 510 is received in the receiving groove of the insulating member 530, so that a portion of the insulating member 530 may be further sandwiched between the adjacent third electrodes 330, so as to improve the insulation reliability between the third electrodes 330 and the first electrodes 310, and at the same time, not affect the connection relationship between the first electrodes 310.
In addition, in the case that the first conductive member 510 and the first electrode 310 have the same size in the thickness direction of the sound-to-electricity conversion layer 100, an avoiding groove may be provided on the second conductive member 520, and one end of the insulating member 530 may be protruded toward the side of the first electrode 310 away from the sound-to-electricity conversion layer 100, so as to separate the first conductive member 510 and the second conductive member 520 by the end of the insulating member 530. Moreover, the protruding portion of the insulating member 530 may protrude into the avoiding groove, so that the insulating member 530 can be supported on the second conductive member 520, and the installation stability of the insulating member 530 is improved. In the present embodiment, the first conductive member 510, the second conductive member 520, and the insulating member 530 form a bridging structure 500.
As mentioned above, the display module can be applied in the electronic device, and the display module can be supported on the middle frame 710 of the electronic device, in the above embodiment, one end of the second conductive member 520 away from the sound-electricity converting layer 100 can be abutted to the middle frame 710, and since the second conductive member 520 is used to connect the two adjacent third electrodes 330, the size of the second conductive member 520 can be relatively small, so that one side of any third electrode 330 away from the sound-electricity converting layer 100 still has a larger area not covered by the second conductive member 520, and since the space of one side of the first electrode 310 away from the sound-electricity converting layer 100 is not necessarily covered by the second conductive member 520, so that the first electrode 310 and the third electrode 330 can form the sound wave reflecting cavity 730 with the middle frame 710, the size of the sound wave reflecting cavity 730 along the thickness direction of the sound-electricity converting layer 100 can be determined according to actual requirements, and the size of the acoustic wave reflecting cavity 730 in the corresponding direction can be changed by adjusting the thickness of the corresponding portion of the second conductive member 520.
By forming the acoustic wave reflection cavity 730, a certain avoidance space can be provided for the vibration operation of the acoustic-electric conversion layer 100, thereby improving the reliability of the acoustic-electric conversion layer 100. Moreover, the part of the sound wave generated by the sound-electricity conversion layer 100 that propagates in the direction away from the display surface, i.e., in the direction close to the middle frame 710, can be reflected on the surface of the middle frame 710 in the sound wave reflection cavity 730, and then is emitted in the direction away from the middle frame 710, i.e., in the direction of the display surface of the display module. Furthermore, by adopting the technical scheme, the reflection amount of the ultrasonic wave can be increased in the ultrasonic mode, so that the amount of the electric signals which can be received by the receiving electrode is increased, and finally the purpose of improving the ultrasonic identification precision is achieved. In addition, the sound wave reflection cavity 730 is formed by the second conductive member 520, so that the second conductive member 520 can provide a stable supporting effect for the display module, and other structures do not need to be additionally arranged to provide a supporting effect for the display module, thereby reducing the design and processing difficulty of the display module.
As described above, one or more of the first electrodes 310 may be provided with the second electrodes 320, one or more of the third electrodes 330 may be provided with the second electrodes 320, and one or more of the first electrodes 310 and one or more of the third electrodes 330 may be provided with the second electrodes 320. In order to improve the utilization rate of the space, optionally, at least two second electrodes 320 may be disposed in correspondence with any one of the first electrodes 310 and any one of the third electrodes 330 in the thickness direction of the sound-electricity conversion layer 100. Under the condition of adopting this kind of technical scheme, still make the display module assembly possess full screen identification's function, promptly, the user can carry out fingerprint identification through arbitrary position department on the display module assembly, and this can greatly promote fingerprint identification's convenience, and then promotes user experience.
In addition, at least two second electrodes 320 corresponding to the first electrode 310 and/or the third electrode 330 may be arranged in a row, so as to improve the space utilization rate and improve the receiving performance of the at least two second electrodes 320 corresponding to the same first electrode 310 (or the third electrode 330) on the ultrasonic wave to a certain extent. Specifically, in the case that the first electrode 310 and the third electrode 330 are both square structures, each second electrode 320 may also be a square structure, and at least two second electrodes 320 corresponding to the same first electrode 310 (or third electrode 330) are arranged in a row-by-row manner.
Compared with the relatively low pulse frequency and pulse amplitude in the touch mode, the frequency of the pulse signal sent by the driving electrode in the ultrasonic mode is relatively high, the pulse amplitude is relatively large, and further the power consumption in the ultrasonic mode is relatively high, so that in order to reduce the power consumption of the display module, the display module can work in the touch mode firstly in the working process of the display module in a set scene, the display module works in the touch mode, and under the condition that the display module is detected to be close to or contacted with living bodies such as user fingers through capacitance change, the display module can be switched to the ultrasonic mode, so that the user can be ensured to utilize the display module to perform fingerprint identification. The setting scene can be specifically a screen locking interface, a payment confirmation interface and the like, and technicians in the field can also assign values to the setting scene according to the actual situation of the electronic equipment so as to expand the application range of the control mode and further reduce the power consumption of the display module.
As described above, in the above-described embodiment, any position in the display module has the ultrasonic recognition capability, and in this case, the power consumption of the display module may be further increased. Based on the above embodiment, the display module may also work in the touch mode when working in the setting scene, and when a living body approaches or contacts the display module, the display module is switched to the ultrasonic mode to perform fingerprint recognition.
Furthermore, the display module operates in the touch mode, and the area which the living body is likely to touch can be detected, so that the area which corresponds to the area which the living body is likely to touch in the display module can be further controlled to be switched from the touch mode to the ultrasonic mode, and for the area which is basically unlikely to touch by the living body, the area can still be kept in the touch mode to operate, and the power consumption of the display module is further reduced.
As described above, in the process of disposing the second electrodes 320, optionally, the number of the second electrodes 320 corresponding to different first electrodes 310 (or third electrodes 330) may be the same or different, and the parameters such as the arrangement and the intervals of the plurality of second electrodes 320 may also be the same or different. In one embodiment of the present application, the shape and size of each second electrode 320 may be the same, and the number of second electrodes 320 facing the first electrode 310 (and/or the third electrode 330) of any one group may be equal, so that the second electrodes 320 of any one group are arranged in a row-to-row manner. Further, in the thickness direction of the acoustic-electric conversion layer 100: the outer contour of any first electrode 310 may coincide with the projection of the figure surrounded by the outer contours of the plurality of second electrodes 320 corresponding to that first electrode 310, and/or the outer contour of any third electrode 330 may coincide with the projection of the figure surrounded by the outer contours of the plurality of second electrodes 320 corresponding to that third electrode 330.
Under the condition of adopting the technical scheme, when the ultrasonic waves emitted from any position in the area of the sound-electricity conversion layer 100 corresponding to the first electrode 310 and/or the third electrode 330 are reflected and then act on the sound-electricity conversion layer 100 again, the electric signals generated at the corresponding position of the sound-electricity conversion layer 100 can be basically ensured to be received by the second electrode 320 arranged at the corresponding position, so that the space utilization rate of the display module can be increased, the receiving range of the second electrode 320 is maximally expanded, and the fingerprint identification precision is further improved. Of course, it should be noted that the electric signal generated when the acoustic wave emitted from the area corresponding to the gap between the second electrodes 320 in the acoustic-electric conversion layer 100 is reflected and acts on the corresponding position of the acoustic-electric conversion layer 100 may not be received by the second electrodes 320. However, in the practical application process, the gap between the adjacent second electrodes 320 is relatively small, and the theoretical parameters of the electrical signals at the region between the second electrodes 320 can be compensated by the corresponding algorithm through calculating the specific parameters of the electrical signals received by the two adjacent second electrodes 320, so as to improve the accuracy of fingerprint identification.
As described above, in the ultrasonic mode, the first electrode 310 and/or the third electrode 330, on which the second electrode 320 is correspondingly disposed, serves as a driving electrode to transmit an electrical signal to a corresponding region of the acoustic-electric conversion layer 100, so that the corresponding region of the acoustic-electric conversion layer 100 vibrates to convert the electrical signal into a sound signal. In order to make the parts corresponding to different driving electrodes during the vibration of the acousto-electric conversion layer 100 independent from each other, optionally, the acousto-electric conversion layer 100 includes a plurality of sub-conversion layers 110, and any one of the first electrodes 310 and any one of the third electrodes 330 corresponds to one sub-conversion layer 110. In this case, the sub-conversion layers 110 are independent of each other, so that the vibration processes of the sub-conversion layers 110 are ensured not to interfere with each other, and the operational reliability of the entire sound-electricity conversion layer 100 is further improved.
Specifically, the actual size of the sub-conversion layer 110 may correspond to the size of its corresponding electrodes (including the first electrode 310 and the third electrode 330). Further, the size of the sub-conversion layer 110 may be made slightly larger than that of the corresponding electrode, in detail, in the thickness direction of the acousto-electric conversion layer 100, the projected edge of any sub-conversion layer 110 corresponding to the first electrode 310 can be made to be located outside the first electrode 310, and the projected edge of any sub-conversion layer 110 corresponding to the third electrode 330 is located outside the third electrode 330, this enables the sub-conversion layer 110 corresponding to the first electrode 310 to cover the first electrode 310, and enables the sub-conversion layer 110 corresponding to the third electrode 330 to cover the third electrode 330, thereby ensuring that the electric signal output from any position of the first electrode 310 and/or the third electrode 330, which are driving electrodes, can act on the corresponding sub-conversion layer 110, and causing the sub-conversion layer 110 to vibrate, and an acoustic signal is sent out, so that the fingerprint identification range is expanded to a certain extent, and the fingerprint identification precision is further improved.
Based on the display module disclosed in any of the above embodiments, the application further discloses an electronic device, and the electronic device includes any of the above display modules, and of course, the electronic device may further include a housing, a battery and other components, and the text is simple and will not be described here one by one.
The electronic device disclosed in the embodiment of the application can be a mobile phone, a computer, an electronic book reader, a wearable device and the like, and the embodiment of the application does not limit the specific type of the electronic device.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A display module comprises an acoustic-electric conversion layer, a plurality of first electrodes and a plurality of third electrodes,
the first electrodes and the third electrodes are arranged on the first side of the sound-electricity conversion layer at intervals, a plurality of second electrodes are arranged on the second side of the sound-electricity conversion layer, which is far away from the first electrodes, at intervals, and one first electrode or one third electrode is opposite to at least two second electrodes;
the display module has a touch mode and an ultrasonic mode, wherein,
in the touch mode, the first electrode is a driving electrode, the third electrode is a receiving electrode, and the first electrode and the third electrode are used for detecting a touch capacitance;
in the ultrasonic mode, the first electrode and/or the third electrode correspondingly provided with the second electrode are/is a driving electrode, the second electrode is used as a receiving electrode, the driving electrode drives the sound-electricity conversion layer to generate ultrasonic waves, and the receiving electrode receives the reflected ultrasonic waves.
2. The display module according to claim 1, wherein the display module is mounted on a middle frame of an electronic device, and the first electrode and the third electrode form a sound wave reflection cavity with the middle frame along a thickness direction of the sound-electricity conversion layer.
3. The display module according to claim 1, wherein the display module comprises an insulating member, any two adjacent first electrodes are connected by a first conductive member, any two adjacent third electrodes are connected by a second conductive member, the second conductive member is located on one side of the first conductive member, and the third electrodes and the second conductive member are both insulated from the first conductive member by the insulating member.
4. The display module assembly according to claim 3, wherein the first conductive member has a size equal to that of the first electrode in a thickness direction of the sound-to-electricity conversion layer, the second conductive member is located on a side of the first electrode facing away from the sound-to-electricity conversion layer, the second conductive member is provided with an avoiding groove, and one end of the insulating member protrudes toward the side of the first electrode facing away from the sound-to-electricity conversion layer and is accommodated in the avoiding groove.
5. The display module according to claim 4, wherein the display module is mounted on a middle frame of an electronic device, one end of the second conductive member facing away from the sound-to-electricity conversion layer abuts against the middle frame, and the first electrode and the third electrode form a sound wave reflection cavity with the middle frame.
6. The display module according to claim 1, wherein at least two second electrodes are disposed corresponding to any one of the first electrodes and any one of the third electrodes in a thickness direction of the sound-to-electricity conversion layer.
7. The display module according to claim 1, wherein, in a thickness direction of the sound-to-electricity conversion layer:
the projection of a figure enclosed by the external outline of any first electrode and the external outlines of at least two second electrodes corresponding to the first electrode is superposed;
and/or the projection of the outer contour of any third electrode is superposed with the projection of a figure enclosed by the outer contours of at least two second electrodes corresponding to the third electrode.
8. The display module according to claim 1, wherein the sound-to-electricity conversion layer comprises a plurality of sub-conversion layers, and one sub-conversion layer corresponds to each of the first electrode and the third electrode.
9. The display module according to claim 8, wherein, along the thickness direction of the sound-to-electricity conversion layer, an edge of a projection of any one of the sub-conversion layers corresponding to the first electrode is located outside the first electrode, and an edge of a projection of any one of the sub-conversion layers corresponding to the third electrode is located outside the third electrode.
10. An electronic device, comprising the display module according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110799623.XA CN113486831A (en) | 2021-07-15 | 2021-07-15 | Display module and electronic equipment |
| PCT/CN2022/105181 WO2023284734A1 (en) | 2021-07-15 | 2022-07-12 | Display module and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110799623.XA CN113486831A (en) | 2021-07-15 | 2021-07-15 | Display module and electronic equipment |
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| CN113486831A true CN113486831A (en) | 2021-10-08 |
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| CN202110799623.XA Pending CN113486831A (en) | 2021-07-15 | 2021-07-15 | Display module and electronic equipment |
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| CN (1) | CN113486831A (en) |
| WO (1) | WO2023284734A1 (en) |
Cited By (1)
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| WO2023284734A1 (en) * | 2021-07-15 | 2023-01-19 | 维沃移动通信有限公司 | Display module and electronic device |
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| CN113486831A (en) * | 2021-07-15 | 2021-10-08 | 维沃移动通信有限公司 | Display module and electronic equipment |
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| WO2023284734A1 (en) | 2023-01-19 |
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