CN111090331A - Pressure sensor and electronic device - Google Patents
Pressure sensor and electronic device Download PDFInfo
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- CN111090331A CN111090331A CN202010073990.7A CN202010073990A CN111090331A CN 111090331 A CN111090331 A CN 111090331A CN 202010073990 A CN202010073990 A CN 202010073990A CN 111090331 A CN111090331 A CN 111090331A
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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
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/205—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using distributed sensing elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The application provides a pressure sensor and an electronic device. The pressure sensor includes: the substrate layer comprises a first area and two second areas arranged on two opposite sides of the first area; a conductive metal layer disposed in the first region; the supporting layer is arranged in the two second areas, and the thickness of the supporting layer is larger than that of the conductive metal layer; the two ends of the elastic film layer are respectively connected with the supporting layer and cover the conductive metal layer at intervals; the sensing electrode layer is arranged on the lower surface of the elastic film layer and is arranged at intervals with the conductive metal layer, the first electrode and the second electrode are used for being in contact with the conductive metal layer when the elastic film layer is pressed outside so as to realize electric connection, and the resistance information of the circuit access part of the first electrode and the second electrode is output and used for calculating the pressing position on the elastic film layer. The method and the device can reduce wiring difficulty and reduce process complexity.
Description
Technical Field
The application relates to the technical field of sensors, in particular to a pressure sensor and electronic equipment.
Background
In general, for applications of strain gauges or pressure sensors of the electrical contact type, the mechanical structure of the elastic body must be in a strictly linear relationship with the strain gauge or membrane. Therefore, the strain gauge or the thin film can reach a higher strain level, the response sensitivity is improved, and the change condition of the pressure is accurately measured. However, even if the sensitivity is improved, in order to perform the pressing operation of a plurality of regions, a plurality of sensing blocks need to be provided, and thus a plurality of signal lines need to be provided to transmit the sensing signals of the respective sensing blocks, which leads to complicated wiring and complicated process.
Therefore, the prior art has defects and needs to be improved urgently.
Disclosure of Invention
An object of the embodiments of the present application is to provide a pressure sensor and an electronic device, so as to reduce wiring difficulty and process complexity.
In a first aspect, an embodiment of the present application provides a pressure sensor, including:
the substrate layer comprises a first area and two second areas arranged on two opposite sides of the first area;
a conductive metal layer disposed in the first region;
the supporting layer is arranged in the two second areas, and the thickness of the supporting layer is larger than that of the conductive metal layer;
the two ends of the elastic film layer are respectively connected with the supporting layer and cover the conductive metal layer at intervals;
the induction electrode layer is arranged on the lower surface of the elastic film layer and is arranged at intervals with the conductive metal layer, at least two electrodes which are opposite and arranged at intervals are formed on the induction electrode layer, and the at least two electrodes comprise a first electrode and a second electrode; the first electrode and the second electrode are respectively connected with the first lead and the second lead in a one-to-one correspondence manner;
the first electrode and the second electrode are used for being in contact with the conductive metal layer when a user presses the elastic film layer so as to realize electric connection, and the resistance information of the part, connected into the circuit, of the first electrode and the second electrode is output through the first lead and the second lead, and the resistance information is used for calculating the pressing position on the elastic film layer.
According to the pressure sensor provided by the embodiment of the application, the first electrode and the second electrode are used for being in contact with the conductive metal layer when the elastic film layer is externally pressed so as to realize electric connection, and the resistance information of the circuit part connected with the first electrode and the second electrode is output and used for calculating the pressing position on the elastic film layer; therefore, the position detection of the pressing operation can be realized only by adopting two electrodes, the wiring difficulty can be reduced, and the process complexity is reduced.
Optionally, in the pressure sensor according to the embodiment of the present application, the pressure sensor further includes:
a first lead connected to one end of the first electrode;
a second lead connected to one end of the second electrode;
and the signal processing circuit is connected with the first lead and the second lead to acquire the resistance information, and calculates the contact positions of the first electrode and the second electrode with the conductive metal layer according to the resistance information so as to calculate the position information of the pressed position on the elastic film layer.
Optionally, in the pressure sensor according to this embodiment of the present application, the first electrode includes a first trunk electrode, and the second electrode includes a second trunk electrode;
the first main electrode and the second main electrode extend along a first preset direction;
the first main electrode and the second main electrode are arranged at intervals, and the first main electrode and the second main electrode are opposite to the part of the conductive metal layer.
The position detection can be realized only by adopting two main electrodes, the structure is simple, and the cost is low.
Optionally, in the pressure sensor according to the embodiment of the present application, the first trunk electrode and the second trunk electrode are both rectangular strips and parallel to each other.
Optionally, in the pressure sensor according to this embodiment of the present application, the first electrode further includes a plurality of first branch electrodes, and the second electrode further includes a plurality of second branch electrodes;
the plurality of first branch electrodes are arranged on one side of the first main electrode facing the second main electrode at intervals, and one end part of each first branch electrode is connected with the first main electrode; the plurality of second branch electrodes are arranged on one side, facing the first main electrode, of the second main electrode at intervals, one end of each second branch electrode is connected with the second main electrode, the other end of each first branch electrode extends into a gap between two adjacent second branch electrodes, and the other end of each second branch electrode extends into a gap between two adjacent first branch electrodes.
According to the embodiment of the application, the plurality of branch electrodes are arranged on each trunk electrode, so that the position detection accuracy can be improved.
Optionally, in the pressure sensor according to this embodiment of the present application, the plurality of first branch electrodes and the plurality of second branch electrodes are parallel to each other.
Optionally, in the pressure sensor according to this embodiment of the present application, the at least two electrodes include a first electrode, a second electrode, a third electrode, and a fourth electrode; the first electrode comprises a first main electrode and a plurality of first branch electrodes; the second electrode comprises a second main electrode and a plurality of second branch electrodes; the third electrode comprises a third main electrode and a plurality of third branch electrodes; the fourth electrode comprises a fourth main electrode and a plurality of fourth branch electrodes;
the first main electrode, the second main electrode, the third main electrode and the fourth main electrode are sequentially and uniformly distributed at intervals; the plurality of first branch electrodes are arranged on one side of the first main electrode facing the second main electrode at intervals, and one end part of each first branch electrode is connected with the first main electrode; the plurality of second branch electrodes are uniformly distributed on two sides of the second main electrode; the plurality of third branch electrodes are uniformly distributed on two sides of the third main electrode, and the plurality of fourth branch electrodes are uniformly arranged on one side of the fourth main electrode facing the third main electrode at intervals; the second branch electrodes of the plurality of second branch electrodes located at one side of the first main electrode are distributed in a crossed manner with the first branch electrodes, the second branch electrodes of the plurality of second branch electrodes located at one side of the third main electrode are distributed in a crossed manner with the third branch electrodes of the plurality of third branch electrodes located at one side of the second main electrode, and the third branch electrodes of the plurality of third branch electrodes located at one side of the fourth main electrode are distributed in a crossed manner with the fourth branch electrodes.
This application embodiment is through setting up first electrode, second electrode, third electrode and fourth electrode, not only can detect the position of pressing on the electrode extending direction, can also detect the position of pressing on the electrode array orientation, and the detection range is pressed in the improvement of being convenient for, improves the accuracy that detects the position.
Optionally, in the pressure sensor according to this embodiment of the present application, a rough structural layer is disposed on a lower surface of the elastic film layer.
Optionally, in the pressure sensor according to this embodiment of the application, the rough structure layer is a plurality of bumps or particles disposed on the lower surface of the elastic film layer.
In a second aspect, embodiments of the present application further provide an electronic device, including the pressure sensor in any of the above embodiments.
According to the pressure sensor and the electronic equipment, the first electrode and the second electrode are used for being in contact with the conductive metal layer when the elastic film layer is pressed on the outside so as to realize electric connection, and resistance information of a circuit part connected with the first electrode and the second electrode is output and used for calculating the pressing position on the elastic film layer; therefore, the position detection of the pressing operation can be realized only by adopting two electrodes, the wiring difficulty can be reduced, and the process complexity is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a layered structure of a pressure sensor according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a first planar structure of a pressure sensor according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a second plane structure of a pressure sensor according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a third plane structure of a pressure sensor according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an elastic film layer of a pressure sensor according to an embodiment of the present disclosure.
Icon: 10-a substrate layer, 20-a conductive metal layer, 30-a support layer, 40-an induction electrode layer, 50-an elastic film layer, 60-a first lead, 70-a second lead, 80-a third lead, 90-a fourth lead, 41-a first electrode, 42-a second electrode, 43-a third electrode, 44-a fourth electrode, 411-a first main electrode, 421-a second main electrode, 431-a third main electrode, 431-a fourth main electrode, 412-a first branch electrode, 422-a second branch electrode, 432-a third branch electrode, 442-a fourth branch electrode and 51-a rough structure layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Please refer to fig. 1 and fig. 2, wherein fig. 1 is a schematic diagram of a layered structure of a pressure sensor according to an embodiment of the present disclosure. The pressure sensor includes: a substrate layer 10, a conductive metal layer 20, a supporting layer 30, a sensing electrode layer 40, an elastic film layer 50, a first lead 60, a second lead 70 and a signal processing circuit (not shown).
The substrate layer 10 includes a first region and two second regions disposed on two opposite sides of the first region. The conductive metal layer 20 is arranged in the first area; the support layer 30 is disposed in the two second regions, and the thickness of the support layer 30 is greater than that of the conductive metal layer 20. Two ends of the elastic film layer 50 are respectively connected with the support layer 30 and cover the conductive metal layer 20 at intervals; the sensing electrode layer 40 is disposed on the lower surface of the elastic film layer 50 and spaced apart from the conductive metal layer 20, and the sensing electrode layer 40 forms at least two electrodes. The at least two electrodes include a first electrode 41 and a second electrode 42 which are oppositely and separately arranged; the first electrode 41 and the second electrode 42 are used for contacting the conductive metal layer 20 when the user presses the elastic film layer 50, so as to realize electrical connection, and outputting resistance information of a circuit connecting part of the first electrode 41 and the second electrode 42. One end of the first lead 60 is connected to one end of the first electrode 41, one end of the second lead 70 is connected to one end of the second electrode 42, and the signal processing circuit is connected to the first lead 60 and the second lead 70, respectively. The signal processing circuit calculates the contact positions of the first electrode 41 and the second electrode 42 with the conductive metal layer 20 based on the resistance information, and further calculates the position information of the pressed position on the elastic film layer 50.
It will be appreciated that in some embodiments, the signal processing circuit is not essential, and the pressure sensor merely outputs resistance information to an external electronic device, which calculates position information of the pressed region on the elastic film layer 50 based on the resistance information.
The base layer 10 may include a base film and a carbon cake layer disposed on the base film. Of course, it is understood that other substrates with good physical properties, such as glass substrates, can also be used as the base layer 10.
The conductive metal layer 20 is formed by depositing a metal having a good conductivity. For example, the material silver or the material copper can be used. Wherein, the supporting layer 30 is made of colloid.
Specifically, referring to fig. 2, the first electrode 41 includes a first main electrode 411 and a plurality of first branch electrodes 412. The second electrode 42 includes a second trunk electrode 421 and a plurality of second branch electrodes 422. The first main electrode 411 and the second main electrode 421 both extend along a first predetermined direction, and specifically may extend in a meandering manner or along a straight line. One end of the first branch electrode 412 is vertically connected to the first main electrode 411, and one end of the second branch electrode 422 is vertically connected to the second main electrode 421. The first electrode 41 and the second electrode 42 are formed by a photolithography process.
The first main electrode 411 and the second main electrode 421 are disposed at an interval, and the first main electrode 411, the first branch electrode, the second main electrode 421 and the second branch electrode 422 are all opposite to a part of the conductive metal layer 20, that is, the vertical projections of the first main electrode 411, the first branch electrode, the second main electrode 421 and the second branch electrode 422 on the substrate layer 10 are located within the range of the conductive metal layer 20. The plurality of first branch electrodes 412 are disposed at intervals on a side of the first main electrode 411 facing the second main electrode 421, and one end of the first branch electrode 412 is connected to the first main electrode 411; the plurality of second branch electrodes 422 are disposed at intervals on one side of the second main electrode 421 facing the first main electrode 411, one end of each of the second branch electrodes 422 is connected to the second main electrode 421, the other end of each of the first branch electrodes 412 extends into a gap between two adjacent second branch electrodes 422, and the other end of each of the second branch electrodes 422 extends into a gap between two adjacent first branch electrodes 412.
The first stem electrode 411 and the second stem electrode 421 are linear and parallel to each other. Specifically, the first stem electrode 411 and the second stem electrode 421 are rectangular and long. The first branch electrode 412 and the second branch electrode 422 are rectangular strips, and the length and width of the first branch electrode 412 and the second branch electrode 422 are the same. The plurality of first diverging electrodes 412 and the plurality of second diverging electrodes 422 are parallel to each other.
It is understood that, in other embodiments, as shown in fig. 3, the first electrode 41 and the second electrode 42 both extend along a straight line, the first electrode 41 includes only one first trunk electrode 411, and the second electrode 42 includes only one second trunk electrode 421.
In some embodiments, as shown in fig. 4, the sensing electrode layer 40 includes a first electrode 41, a second electrode 42, a third electrode 43, and a fourth electrode 44. Of course, it is understood that the sensing electrode layer 40 can also be formed with more than four electrodes, which are not described herein. The following describes the sensing electrode layer 40 including the first electrode 41, the second electrode 42, the third electrode 43, and the fourth electrode 44 in detail as an example.
Correspondingly, the pressure sensor further comprises a third lead 80 and a fourth lead 90. One end of the third lead 80 is connected to the third electrode 43, the other end of the third lead 80 is connected to the signal processing circuit, and one end of the fourth lead 90 is connected to the fourth electrode 44. The other end of the fourth lead 90 is connected to the signal processing circuit.
The signal processing circuit can calculate not only the X-axis coordinate of the position of the pressing operation but also the Y-axis coordinate of the position of the pressing operation by detecting the resistance information between the two adjacent electrodes. The extending direction of the first electrode 41, the second electrode 42, the third electrode 43, and the fourth electrode 44 is an X axis, and the arrangement direction is a Y axis.
The first electrode 41 includes a first main electrode 411 and a plurality of first branch electrodes 412. The second electrode 42 includes a second main electrode 421 and a plurality of second branch electrodes 422. The third electrode 43 includes a third main electrode 431 and a plurality of third branch electrodes 432. The fourth electrode 44 includes a fourth trunk electrode 441 and a plurality of fourth branch electrodes 442.
The first stem electrode 411, the second stem electrode 421, the third stem electrode 431 and the fourth stem electrode 441 are sequentially and uniformly distributed at intervals. The first, second, third and fourth stem electrodes 411, 421, 431 and 441 are rectangular strips and parallel to each other. The plurality of first branch electrodes 412 are disposed at intervals on a side of the first main electrode 411 facing the second main electrode 421, and one end of the first branch electrode 412 is connected to the first main electrode 411. The plurality of second branch electrodes 422 are uniformly distributed on both sides of the second main electrode 421. The plurality of third branch electrodes 432 are uniformly distributed on two sides of the third main electrode 431, and the plurality of fourth branch electrodes are uniformly spaced on one side of the fourth main electrode 441 facing the third main electrode 431. Moreover, the second branch electrodes 422 of the plurality of second branch electrodes 422 located at one side of the first main electrode 411 are distributed to cross the first branch electrodes 412. The second branch electrodes 422 of the plurality of second branch electrodes 422 located at the side of the third main electrode 431 are distributed to cross the corresponding third branch electrodes 432, and the third branch electrodes 432 of the plurality of third branch electrodes 432 located at the side of the fourth main electrode 441 are distributed to cross the plurality of fourth branch electrodes 442.
When a user presses the elastic film layer, the corresponding area of the sensing electrode layer moves towards the conductive metal layer, so that the two electrodes at the corresponding positions are connected by the conductive metal layer 20, a resistance value in a preset range is detected, and the other electrodes are not connected, so that the resistance is infinite, and the Y-axis coordinate of the position where the pressing operation occurs is judged. And the resistance information detected by the signal processing circuit is different between the two switched-on electrodes due to the difference of the switching-on positions. Therefore, the X-axis coordinate of the position where the pressing operation occurs can be calculated by detecting the obtained resistance values of the two turned-on electrodes.
Of course, the greater the number of electrodes formed by the sensing electrode layer 40, the greater the accuracy of the coordinates in the vertical direction. In order to avoid the position of the pressed point directly on the trunk electrode, the width of the trunk electrode is narrow, specifically, smaller than the length of any branch electrode.
In some embodiments, as shown in fig. 5, the lower surface of the elastic film layer 50 is provided with a rough structure layer 51, so that the stress concentration of the pressing can improve the sensitivity of the detection of the pressing operation. The rough structure layer 51 is a plurality of bumps or particles disposed on the lower surface of the elastic film layer 50.
It is understood that in some embodiments, the rough structure layer 51 is disposed on the upper surface of the elastic film layer 50.
In some embodiments, the upper surface of the substrate layer 10 is provided with a rough structure layer, and the upper rough structure layer of the substrate layer is a plurality of bumps or particles disposed on the upper surface of the substrate layer 10.
According to the pressure sensor and the electronic equipment, the first electrode and the second electrode are used for being in contact with the conductive metal layer when the elastic film layer is pressed on the outside so as to realize electric connection, and resistance information of a circuit part connected with the first electrode and the second electrode is output and used for calculating the pressing position on the elastic film layer; therefore, the position detection of the pressing operation can be realized only by adopting two electrodes, the wiring difficulty can be reduced, and the process complexity is reduced.
This application embodiment is through setting up first electrode, second electrode, third electrode and fourth electrode, not only can detect the position of pressing on the electrode extending direction, can also detect the position of pressing on the electrode array orientation, and the detection range is pressed in the improvement of being convenient for, improves the accuracy that detects the position.
An embodiment of the present application further provides an electronic device, which includes the pressure sensor in any of the above embodiments. For example, the electronic device may be a detection device or a mobile phone.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A pressure sensor, comprising:
the substrate layer comprises a first area and two second areas arranged on two opposite sides of the first area;
a conductive metal layer disposed in the first region;
the supporting layer is arranged in the two second areas, and the thickness of the supporting layer is larger than that of the conductive metal layer;
the two ends of the elastic film layer are respectively connected with the supporting layer and cover the conductive metal layer at intervals;
the induction electrode layer is arranged on the lower surface of the elastic film layer and is arranged at intervals with the conductive metal layer, at least two electrodes which are opposite and arranged at intervals are formed on the induction electrode layer, and the at least two electrodes comprise a first electrode and a second electrode; the first electrode and the second electrode are respectively connected with the first lead and the second lead in a one-to-one correspondence manner;
the first electrode and the second electrode are used for being in contact with the conductive metal layer when a user presses the elastic film layer so as to realize electric connection, and the resistance information of the circuit access part of the first electrode and the second electrode is output through the first lead and the second lead and is used for calculating the pressing position on the elastic film layer.
2. The pressure sensor of claim 1, further comprising:
and the signal processing circuit is connected with the first lead and the second lead to acquire the resistance information, and calculates the contact positions of the first electrode and the second electrode with the conductive metal layer according to the resistance information so as to calculate the position information of the pressed position on the elastic film layer.
3. A pressure sensor according to claim 1 or 2, wherein the first electrode comprises a first trunk electrode and the second electrode comprises a second trunk electrode;
the first main electrode and the second main electrode extend along a first preset direction;
the first main electrode and the second main electrode are arranged at intervals, and the first main electrode and the second main electrode are opposite to the part of the conductive metal layer.
4. The pressure sensor of claim 3, wherein the first and second stem electrodes are rectangular strips and parallel to each other.
5. The pressure sensor of claim 4, wherein the first electrode further comprises a plurality of first branch electrodes, the second electrode further comprises a plurality of second branch electrodes;
the plurality of first branch electrodes are arranged on one side of the first main electrode facing the second main electrode at intervals, and one end part of each first branch electrode is connected with the first main electrode;
the plurality of second branch electrodes are arranged on one side of the second main electrode facing the first main electrode at intervals, and one end parts of the second branch electrodes are connected with the second main electrode;
the other end of each first branch electrode extends into the gap between two adjacent second branch electrodes, and the other end of each second branch electrode extends into the gap between two adjacent first branch electrodes.
6. The pressure sensor of claim 5, wherein the plurality of first branch electrodes and the plurality of second branch electrodes are parallel to each other, the first branch electrodes are perpendicularly connected to the first trunk electrode, and the second branch electrodes are perpendicularly connected to the second trunk electrode.
7. The pressure sensor of claim 1, wherein the at least two electrodes further comprise a third electrode and a fourth electrode;
the first electrode comprises a first main electrode and a plurality of first branch electrodes; the second electrode comprises a second main electrode and a plurality of second branch electrodes; the third electrode comprises a third main electrode and a plurality of third branch electrodes; the fourth electrode comprises a fourth main electrode and a plurality of fourth branch electrodes;
the first main electrode, the second main electrode, the third main electrode and the fourth main electrode are sequentially distributed in parallel and at even intervals; the plurality of first branch electrodes are arranged on one side of the first main electrode facing the second main electrode at intervals, and one end part of each first branch electrode is connected with the first main electrode; the plurality of second branch electrodes are uniformly distributed on two sides of the second main electrode; the plurality of third branch electrodes are uniformly distributed on two sides of the third main electrode, and the plurality of fourth branch electrodes are uniformly arranged on one side of the fourth main electrode facing the third main electrode at intervals; the plurality of second branch electrodes located on one side of the first main electrode in the plurality of second branch electrodes are distributed in a crossed manner with the plurality of first branch electrodes, the plurality of second branch electrodes located on one side of the third main electrode in the plurality of second branch electrodes are distributed in a crossed manner with the plurality of third branch electrodes located on one side of the second main electrode in the plurality of third branch electrodes, and the third branch electrodes located on one side of the fourth main electrode in the plurality of third branch electrodes are distributed in a crossed manner with the plurality of fourth branch electrodes.
8. A pressure sensor as claimed in claim 1, wherein the lower surface of the elastic film layer is provided with a rough structural layer.
9. The pressure sensor of claim 8, wherein the rough structural layer is a plurality of bumps or particles disposed on a lower surface of the elastic film layer.
10. An electronic device, characterized in that it comprises a pressure sensor according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073990.7A CN111090331A (en) | 2020-01-22 | 2020-01-22 | Pressure sensor and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073990.7A CN111090331A (en) | 2020-01-22 | 2020-01-22 | Pressure sensor and electronic device |
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| CN111090331A true CN111090331A (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010073990.7A Pending CN111090331A (en) | 2020-01-22 | 2020-01-22 | Pressure sensor and electronic device |
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| CN (1) | CN111090331A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136512A (en) * | 2021-11-18 | 2022-03-04 | 深圳国微感知技术有限公司 | Transparent pressure sensor, manufacturing method thereof and switch |
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2020
- 2020-01-22 CN CN202010073990.7A patent/CN111090331A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136512A (en) * | 2021-11-18 | 2022-03-04 | 深圳国微感知技术有限公司 | Transparent pressure sensor, manufacturing method thereof and switch |
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