CN214670556U - Resistance type pressure sensor - Google Patents
Resistance type pressure sensor Download PDFInfo
- Publication number
- CN214670556U CN214670556U CN202023348571.4U CN202023348571U CN214670556U CN 214670556 U CN214670556 U CN 214670556U CN 202023348571 U CN202023348571 U CN 202023348571U CN 214670556 U CN214670556 U CN 214670556U
- Authority
- CN
- China
- Prior art keywords
- electrode
- substrate
- pressure
- particles
- pressure sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a resistance type pressure sensor, which comprises a pressure substrate and a supporting substrate which are arranged in parallel relatively; one side of the pressure substrate, which faces the support substrate, is provided with a strip-shaped first electrode, and the surface of the pressure substrate distributed with the first electrode and the first electrode are distributed with first particles; a second electrode is arranged on one side of the supporting substrate facing the pressure substrate, second particles are distributed on the surface of the supporting substrate distributed with the second electrode and the surface of the second electrode; the first electrode and the second electrode are arranged in an intersecting way; the pressure-sensitive unit is formed in the area where the first electrode and the second electrode are attached to each other; the first particles and the second particles are provided with conductive channels and are uniformly and oppositely arranged; the opposite edges of the pressure substrate and the support substrate form a sealed space through a connecting piece; an insulating fluid is filled between the pressure substrate and the support substrate; the first electrode and the second electrode are respectively and electrically connected with an external test resistance circuit; the utility model discloses a touching is sensitive, accurate induction pressure.
Description
Technical Field
The utility model relates to a sensor technical field especially relates to a resistance-type pressure sensor.
Background
A touch panel is an input device that allows a user to input information through physical contact with the panel device. Touch panels are commonly used as input devices for various products, such as home appliances, televisions, notebook computers and monitors, and portable electronic devices, such as notebook computers, electronic books, portable multimedia players, global positioning system navigation units, ultra mobile computers, smart phones, smart watches, tablet computers, and mobile communication terminals.
Most touch panels can sense input when capacitively coupled to a conductive touch implement (e.g., a user's finger) through conductive objects within the sensor. And the position of the sensing point on a two-dimensional plane (i.e., on the x-y plane) is recorded by detecting the capacitance change at the sensing point. But the conventional touch panel cannot detect the magnitude of force (i.e., a sensing input in the z-axis direction) when a user presses. Conventional resistive pressure sensors typically do not have touch sensitive characteristics. The user needs to apply a large pressure to activate the sensor, resulting in a poor user experience.
Another problem found in many touch panel technologies is that they lack the ability to track multiple points of contact simultaneously. The most common technique for multi-touch systems is the projected capacitance method. However, the projected capacitance method has some significant limitations. For example, it cannot detect touch input from a non-conductive object (e.g., a plastic pen).
Disclosure of Invention
An object of the utility model is to provide a resistance-type pressure sensor, this utility model touching is sensitive, accurate induced pressure.
For solving the technical problem, the technical proposal of the utility model is that: a resistance type pressure sensor comprises a pressure substrate and a supporting substrate which are arranged in parallel relatively; a first electrode is arranged on one side of the pressure substrate facing the support substrate, the first electrode is arranged on the pressure substrate at intervals in a strip-shaped insulating manner, and first particles are distributed on the surface of the pressure substrate on which the first electrode is distributed and the first electrode; a second electrode is arranged on one side of the supporting substrate facing the pressure substrate, the second electrode is arranged on the supporting substrate at intervals in a strip-shaped insulating manner, and second particles are distributed on the surface of the supporting substrate on which the second electrode is distributed and the surface of the second electrode; the first electrode and the second electrode are arranged in an intersecting way; the pressure-sensitive unit is formed in the area where one first electrode and one second electrode are attached to each other; the first particles and the second particles are provided with conductive channels and are uniformly and oppositely arranged; the first electrode and the second electrode are respectively in electric contact with the first particles and the second particles on the same side of the first electrode and the second electrode; the opposite edges of the pressure substrate and the support substrate form a sealed space through a connecting piece; an insulating fluid is filled between the pressure substrate and the support substrate; the first electrode and the second electrode are respectively electrically connected to an external test resistance circuit.
In a further improvement, a first conductive film is arranged between the first electrode and the first particles; and a second conductive film is arranged between the second electrode and the second particles. Electrical contact between the first particles and the second particles with the first electrode and the second electrode is effectively ensured.
In a further improvement, four corners or four sides of each pressure-sensitive unit are provided with supports. The utility model discloses a four corners or the four sides at every pressure-sensitive unit set up the supporter and do benefit to pressure-sensitive unit middle part and take place deformation at first, improve the pressure sensitivity.
Preferably, the support is cylindrical, having a diameter of 0.03mm to 0.1mm and a height of 0.03mm to 0.5 mm.
Preferably, the resistive pressure sensor is optically transparent. Do benefit to the utility model discloses be applied to in printing opacity systems such as panel.
In a further refinement, the pressure substrate is coated with an optically transparent protective coating. Guarantee the utility model discloses have lasting stable luminousness.
Preferably the insulating fluid is a gas or a liquid. The insulating fluid of the present invention is an insulating gas or a gas mixture, such as air, or a non-volatile liquid, such as ethylene glycol, silicone oil or mineral oil.
In a further improvement, the first electrode and the second electrode are orthogonally arranged.
By adopting the technical scheme, the beneficial effects of the utility model are that:
the utility model discloses under the condition that does not exert external force, the first granule that has electrically conductive channel that corresponds from top to bottom and second granule do not contact each other mutually and insulate, the resistance that can detect between first electrode and the second electrode is infinity;
under the action of force (for example, a user presses the pressure receiving plate by a finger), partial conductive channels are mutually communicated, a closed loop is formed between the first electrode layer and the second electrode layer, and a certain resistance can be detected;
the larger the applied force is, the upper and lower conduction is carried out at the pressing position in sequence, and the number of conductive channels which are conducted is increased, so that the detectable resistance between the first electrode and the second electrode is reduced, and the pressure sensitivity and the pressure sensing accuracy are realized;
the utility model discloses the upper limit of pressure value is less than 15N, and pressure is sensitive.
Thereby achieving the above object of the present invention.
Drawings
Fig. 1 is a schematic structural diagram of a resistive pressure sensor according to the present invention;
FIG. 2 is a schematic sectional view of the present invention;
FIG. 3 is a schematic diagram illustrating the operation of the first embodiment of the present invention;
FIG. 4 is an R-F curve of a first embodiment of the present invention;
fig. 5 is a schematic diagram of the first embodiment of the present invention for realizing multi-touch;
FIG. 6 is a schematic view of the operation principle of the second embodiment of the present invention;
FIG. 7 is a schematic view of the operation principle of the third embodiment of the present invention;
fig. 8 is a schematic view of the working principle of the fourth embodiment of the present invention.
In the figure:
a pressure substrate 1; a support substrate 2; a first electrode 3; first particles 4; a second electrode 5; second particles 6; a connecting member 7; an insulating fluid 8; a support 11; a protective coating 12.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
The present embodiment discloses a resistive pressure sensor, as shown in fig. 1 to 5, including a pressure substrate 1 and a support substrate 2 arranged in parallel; a first electrode 3 is arranged on one side of the pressure substrate 1 facing the support substrate 2, the first electrode 3 is arranged on the pressure substrate 1 at intervals in a strip-shaped insulating manner, and first particles 4 are distributed on the surfaces of the pressure substrate 1 on which the first electrode 3 is distributed and the first electrode 3; a second electrode 5 is arranged on one side of the supporting substrate 2 facing the pressure substrate 1, the second electrode 5 is arranged on the supporting substrate 2 at intervals in a strip-shaped insulating manner, and second particles 6 are distributed on the surfaces of the supporting substrate 2 distributed with the second electrode 5 and the second electrode 5; the first electrode 3 and the second electrode 5 are orthogonally arranged; the pressure-sensitive unit is formed by the mutual overlapping area of one first electrode 3 and one second electrode 5; the first particles 4 and the second particles 6 have conductive paths and are uniformly arranged oppositely; the first electrode 3 and the second electrode 5 are in electrical contact with the first particles 4 and the second particles 6, respectively, on the same side thereof; the opposite edges of the pressure substrate 1 and the support substrate 2 form a sealed space through a connecting piece 7; an insulating fluid 8 is filled between the pressure substrate 1 and the support substrate 2; the first electrode 3 and the second electrode 5 are electrically connected to an external test resistance circuit, respectively.
As shown in fig. 4, in the case of no external force, the first particles 4 and the second particles 6 having conductive paths corresponding to each other at the top and bottom are not in contact with each other and insulated from each other, and the detectable resistance between the first electrode 3 and the second electrode 5 is infinite; under the action of force (for example, a user presses the pressure receiving plate through a finger), partial conductive channels are mutually communicated, a closed loop is formed between the first electrode 3 layer and the second electrode 5 layer, and a certain resistance can be detected; the larger the applied force is, the upper and lower conduction is carried out at the pressing position in sequence, and the number of conductive channels which are conducted is increased, so that the detectable resistance between the first electrode 3 and the second electrode 5 is reduced, and the pressure sensitivity and the pressure sensing accuracy are realized; the upper limit value of the pressure is less than 15N, and the pressure is sensitive.
As shown in fig. 5, the present embodiment can implement multi-touch.
A first conductive film is provided between the first electrode 3 and the first particles 4 in this embodiment; a second conductive film is provided between the second electrode 5 and the second particles 6. The electrical contact between the first particles 4 and the second particles 6 and the first electrode 3 and the second electrode 5 is effectively ensured.
Four corners or four sides of each pressure-sensitive cell in this embodiment are provided with supports 11. In the embodiment, the supports 11 are arranged at four corners or four sides of each pressure-sensitive unit, so that the middle of each pressure-sensitive unit is deformed firstly, and the pressure sensitivity is improved. The support 11 is cylindrical, and the diameter of the support 11 is 0.03mm to 0.1mm and the height is 0.03mm to 0.5 mm.
The resistive pressure sensor in this embodiment is optically transparent. The embodiment is favorably applied to light transmission systems such as panels.
The pressure substrate 1 is coated with an optically transparent protective coating 12 in this embodiment. The embodiment is ensured to have lasting and stable light transmittance.
The insulating fluid 8 is in this embodiment a gas or a liquid. The insulating fluid 8 in this embodiment is an insulating gas or gas mixture, such as air, or a non-volatile liquid, such as glycol, silicone oil or mineral oil.
In one pressure-sensitive cell of this embodiment the first particles 4 and the second particles 6 are arranged at equal heights.
The conductive paths of the first particles 4 and the second particles 6 have different resistances. In the absence of an applied external force, the first particles 4 and the second particles 6 each have an insulating gap therebetween, and the detectable resistance between the two electrode layers is infinite. The pressing force base plate, the higher electrically conductive passageway of resistance can realize the switching on of upper and lower electrode layer under dabbing, forms closed circuit between two electrode layers, can detect certain resistance. When the pressing force is increased, the conductive channels with lower resistance are sequentially conducted up and down. As the number of conducting channels increases, the detectable resistance between the two electrode layers decreases. The conductive path resistance can be distributed according to a certain rule or randomly by taking the area where the conductive paths in the upper electrode layer and the lower electrode layer intersect as a unit. The resistance between the upper electrode layer and the lower electrode layer under different pressures can be adjusted by adjusting the resistance of the conductive channel, so that pressure sensing is realized.
The second embodiment of the present invention is as shown in fig. 6: the first particles 4 and the second particles 6 having the conductive paths have different heights along the z-axis (the direction perpendicular to the pressure-receiving surface). In the case where no external force is applied, the first particles 4 and the second particles 6 each have an insulating gap therebetween, and the resistance detectable between the two electrode layers is infinite. The pressure substrate is pressed, the higher conductive channel can realize the conduction of the upper electrode layer and the lower electrode layer under the light touch, a closed loop is formed between the two electrode layers, and a certain resistance can be detected. When the pressing force is increased, the shorter conductive channels are sequentially conducted up and down. As the number of conducting channels increases, the detectable resistance between the two electrode layers decreases. The area where the conducting paths in the upper electrode layer and the lower electrode layer are intersected is taken as a unit, and the height distribution of the conducting paths along the z axis can be distributed according to a certain rule or can be randomly distributed. The conductive channel which is connected up and down under different pressures can be adjusted by adjusting the height of the conductive channel along the z axis, so that pressure sensing is realized.
The third embodiment of the present invention is shown in fig. 7:
in this embodiment, the plurality of conductive paths in the pressure-sensitive composite material are different in the ease of contact from top to bottom. In the case where no external force is applied, the first particles 4 and the second particles 6 each have an insulating gap therebetween, and the resistance detectable between the two electrode layers is infinite. When the pressure substrate is pressed, the conductive channel which is most easily contacted can realize the conduction of the upper electrode layer and the lower electrode layer under the light touch, a closed loop is formed between the two electrode layers, and a certain resistance can be detected. When the pressing force is increased, the conduction channels with higher contact difficulty are conducted up and down successively. As the number of conducting channels increases, the detectable resistance between the two electrode layers decreases. The difficulty degree of the up-down contact of the conductive channels can be adjusted by controlling the contact area between the upper conductive channel and the lower conductive channel, the area where the conductive paths in the upper electrode layer and the lower electrode layer intersect is taken as a unit, and the difficulty degree of the up-down contact of the conductive channels can be distributed according to a certain rule or can be distributed randomly. The resistance between the upper electrode layer and the lower electrode layer under different pressures can be adjusted by adjusting the difficulty of the upper-lower contact of the conductive channel, so that the pressure sensing is realized.
The fourth embodiment of the present invention is shown in fig. 8:
the first particles 4 and the second particles 6 have different modulus (hardness) distributions of the elastic dielectric material. In the absence of an applied external force, the first particles 4 and the second particles 6 each have an insulating gap therebetween, and the detectable resistance between the two electrode layers is infinite. When the pressure substrate is pressed, the conduction of the upper electrode layer and the lower electrode layer can be realized by the conductive channel around the elastic dielectric material with the minimum modulus (the softest) under the condition of light touch, a closed loop is formed between the two electrode layers, and a certain resistance can be detected. As the force of the press increases, the conductive paths around the higher modulus (stiffer) elastomeric dielectric material conduct up and down in succession. As the number of conducting channels increases, the detectable resistance between the two electrode layers decreases. Adjusting the modulus distribution of the elastic dielectric material can be accomplished by, but is not limited to, controlling the degree of polymerization of the elastic dielectric material in different regions. The area where the conducting paths in the upper electrode layer and the lower electrode layer intersect is taken as a unit, and the modulus change of the elastic dielectric material can be distributed according to a certain rule or can be randomly distributed. By adjusting the modulus change of the elastic dielectric material, the resistance between the upper electrode layer and the lower electrode layer under different pressures can be adjusted, thereby realizing pressure sensing.
The above embodiments and drawings are not intended to limit the forms and modes of the present embodiments, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present embodiments.
Claims (8)
1. A resistive pressure sensor, characterized by: the device comprises a pressure substrate and a support substrate which are arranged in parallel relatively; a first electrode is arranged on one side of the pressure substrate facing the support substrate, the first electrode is arranged on the pressure substrate at intervals in a strip-shaped insulating manner, and first particles are distributed on the surface of the pressure substrate on which the first electrode is distributed and the first electrode;
a second electrode is arranged on one side of the supporting substrate facing the pressure substrate, the second electrode is arranged on the supporting substrate at intervals in a strip-shaped insulating manner, and second particles are distributed on the surface of the supporting substrate on which the second electrode is distributed and the surface of the second electrode;
the first electrode and the second electrode are arranged in an intersecting way; the pressure-sensitive unit is formed in the area where one first electrode and one second electrode are attached to each other;
the first particles and the second particles are provided with conductive channels and are uniformly and oppositely arranged; the first electrode and the second electrode are respectively in electric contact with the first particles and the second particles on the same side of the first electrode and the second electrode;
the opposite edges of the pressure substrate and the support substrate form a sealed space through a connecting piece; an insulating fluid is filled between the pressure substrate and the support substrate;
the first electrode and the second electrode are respectively electrically connected to an external test resistance circuit.
2. The resistive pressure sensor of claim 1, wherein: a first conductive film is arranged between the first electrode and the first particles; and a second conductive film is arranged between the second electrode and the second particles.
3. The resistive pressure sensor of claim 1, wherein: and the four corners or four sides of each pressure-sensitive unit are provided with supports.
4. A resistive pressure sensor according to claim 3, wherein: the support is cylindrical, and the diameter of the support is 0.03mm to 0.1mm, and the height of the support is 0.03mm to 0.5 mm.
5. The resistive pressure sensor of claim 1, wherein: the resistive pressure sensor is optically transparent.
6. The resistive pressure sensor of claim 1, wherein: the pressure substrate is coated with an optically clear protective coating.
7. The resistive pressure sensor of any one of claims 1 through 6, wherein: the insulating fluid is a gas or a liquid.
8. The resistive pressure sensor of any one of claims 1 through 6, wherein: the first electrode and the second electrode are orthogonally arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023348571.4U CN214670556U (en) | 2020-12-31 | 2020-12-31 | Resistance type pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023348571.4U CN214670556U (en) | 2020-12-31 | 2020-12-31 | Resistance type pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214670556U true CN214670556U (en) | 2021-11-09 |
Family
ID=78506930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023348571.4U Active CN214670556U (en) | 2020-12-31 | 2020-12-31 | Resistance type pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214670556U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143073A1 (en) * | 2020-12-31 | 2022-07-07 | 瑞态常州高分子科技有限公司 | Dielectric film layer, preparation method and application |
-
2020
- 2020-12-31 CN CN202023348571.4U patent/CN214670556U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143073A1 (en) * | 2020-12-31 | 2022-07-07 | 瑞态常州高分子科技有限公司 | Dielectric film layer, preparation method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100943989B1 (en) | Capacitive Touch Screen | |
| TWI621986B (en) | Pressure sensing touch display device | |
| US7538760B2 (en) | Force imaging input device and system | |
| US20120019479A1 (en) | Touch pad for multiple sensing | |
| CN104254821B (en) | Touch panel of the touch panel with film, using the film and the stylus being used together with the film | |
| KR101097869B1 (en) | Hybrid Capacitive Touch Screen | |
| CN104423748A (en) | Touch display device | |
| CN102214037A (en) | Electronic device and operation detection method | |
| US20090079708A1 (en) | Three-wire resistive touch panel and display device using same | |
| CN109739382B (en) | Touch device and display equipment | |
| US10649594B2 (en) | Capacitive input device having two detection modes | |
| CN106293249B (en) | Touch module and touch input system | |
| CN102221919A (en) | Touch panel | |
| TWM457926U (en) | Conductor pattern structure of capacitive touch panel | |
| CN214670556U (en) | Resistance type pressure sensor | |
| WO2022166394A1 (en) | Resistance-type multi-stage pressure sensor, pressure sensing method, and application | |
| CN214748555U (en) | Resistance-type pressure sensor with sandwich structure | |
| CN205427796U (en) | Electronic equipment with pressure detection function | |
| CN112835468B (en) | Dielectric film, preparation method and application | |
| JP2012073051A (en) | Detector, electronic apparatus, and robot | |
| KR20140136353A (en) | Capacitive Force-based Input Device Using Elasticity of Housing | |
| US20140043290A1 (en) | Touch screen device | |
| JP2013096846A (en) | Detection device, electronic apparatus and robot | |
| US20120050212A1 (en) | Touch screen | |
| CN214670530U (en) | Resistance type multistage pressure sensor and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |