CN106886334B - Pressure sensing module, electronic device and time sequence control method - Google Patents
Pressure sensing module, electronic device and time sequence control method Download PDFInfo
- Publication number
- CN106886334B CN106886334B CN201710032503.0A CN201710032503A CN106886334B CN 106886334 B CN106886334 B CN 106886334B CN 201710032503 A CN201710032503 A CN 201710032503A CN 106886334 B CN106886334 B CN 106886334B
- Authority
- CN
- China
- Prior art keywords
- electrode
- receiving
- substrate
- driving
- pressure
- 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
Classifications
-
- 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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
Abstract
The pressure sensing module comprises a plurality of first sensing units and a plurality of second sensing units, wherein pressure sensing ranges of the first sensing units and the second sensing units are only partially overlapped, the first sensing units comprise first driving electrodes, first receiving electrodes and third electrodes which are arranged oppositely, the second sensing units comprise second driving electrodes, second receiving electrodes and at least one pressure sensing layer, the second driving electrodes and the second receiving electrodes are arranged oppositely, and the pressure sensing layer is made of pressure sensing materials. The invention also provides an electronic device using the pressure sensing module and a time sequence control method for the pressure sensing module.
Description
Technical Field
The invention relates to a pressure sensing module, an electronic device using the pressure sensing module and a time sequence control method for the pressure sensing module.
Background
The pressure sensing technology is a technology capable of detecting the stress and performing different responses according to the stress. For example, when a user presses a display having a pressure sensing function, the display can detect the magnitude of force applied by the user through a pressure sensing technology and determine what pressing operation the user performs according to the magnitude of the force applied. At present, a pressure sensing module used in the display field includes an equivalent capacitor, and a distance between electrodes of the equivalent capacitor is reduced after the equivalent capacitor receives pressure to cause capacitance change, and the pressure can be calculated by detecting the change of the capacitance to realize a function of sensing external pressure. However, due to the limited distance between the equivalent capacitor electrodes of the prior art pressure sensing module, it becomes impossible to continue to detect the pressure level after the distance is exhausted. Therefore, the range of pressure sensing is limited.
Disclosure of Invention
In view of this, the present invention provides a pressure sensing module with a wider measurement range and higher measurement accuracy.
The pressure sensing module comprises a plurality of first sensing units and a plurality of second sensing units, wherein pressure sensing ranges of the first sensing units and the second sensing units are only partially overlapped, the first sensing units comprise first driving electrodes, first receiving electrodes and third electrodes which are arranged oppositely, the second sensing units comprise second driving electrodes, second receiving electrodes and at least one pressure sensing layer, the second driving electrodes and the second receiving electrodes are arranged oppositely, and the pressure sensing layer is made of pressure sensing materials. Further, the physical property of the pressure sensitive material is changed after the pressure sensitive material is subjected to strain, so that the capacitance of the second driving electrode and the second receiving electrode is changed.
Further, the dielectric constant or resistance of the pressure sensitive material changes after the pressure sensitive material is strained by the pressure, thereby causing the capacitance of the second driving electrode and the second receiving electrode to change.
Furthermore, a first pressure sensitive layer is arranged on one surface, close to the first receiving electrode, of the second driving electrode, and a second pressure sensitive layer is arranged on one surface, close to the second driving electrode, of the second receiving electrode.
Further, the first pressure sensitive layer and the second pressure sensitive layer are in contact with each other or have a certain interval.
Furthermore, the plurality of first sensing units are mutual capacitance type capacitors, the first receiving electrode is arranged between the first driving electrode and the third electrode, compressible gaps are formed between the third electrode and the plurality of first receiving electrodes, and the plurality of first sensing units share the third electrode.
Furthermore, the plurality of first driving electrodes and the plurality of second receiving electrodes are disposed on the same layer, and the plurality of second driving electrodes and the plurality of first receiving electrodes are disposed on the same layer.
Further, the first driving electrode partially surrounds or completely surrounds the second receiving electrode, and the first receiving electrode partially surrounds or completely surrounds the second driving electrode.
Further, the first driving electrode includes a first hollow portion, the first receiving electrode includes a second hollow portion, the second receiving electrode is disposed in the first hollow portion, and the second driving electrode is disposed in the second hollow portion.
Furthermore, the first receiving electrode is of a hollow structure, and an electric field emitted by the first driving electrode can penetrate through the first receiving electrode.
Furthermore, the size of the first driving electrode is larger than that of the first receiving electrode, and the size of the second driving electrode is larger than that of the second receiving electrode.
Furthermore, at least one insulating layer is formed between the first driving electrode and the first receiving electrode.
Furthermore, the size of the first driving electrode is larger than that of the second receiving electrode, and the size of the first receiving electrode is larger than that of the second driving electrode.
The invention provides a display device with a pressure touch function, which comprises the pressure sensing module.
Furthermore, the electronic device further comprises an accommodating module and a display module, the display module and the pressure sensing module are accommodated in the accommodating module, the display module is arranged on one side, away from the bottom of the accommodating module, of the pressure sensing module, and the display module is electrically connected with the pressure sensing module.
The invention also provides a time sequence control method for the pressure touch module, which comprises the steps of dividing the scanning time into a plurality of first sensing unit scanning periods and a plurality of second sensing unit scanning periods, wherein each first sensing unit scanning period and each second sensing unit scanning period are alternately carried out, inputting an electric signal to the first driving electrode during the first sensing unit scanning period to enable the first driving electrode to emit an electric field, providing a constant voltage to the second driving electrode, outputting the electric signal by the first receiving electrode, outputting the electric signal by the second receiving electrode during the second sensing unit scanning period to provide a constant voltage to the first receiving electrode, and inputting the electric signal to the second driving electrode to enable the second driving electrode to emit the electric field.
Further, the plurality of first driving electrodes and the plurality of second receiving electrodes arranged along the same straight line in the first direction are connected by a first wire, the plurality of first receiving electrodes arranged along the same straight line in the second direction are connected by a second wire, and the plurality of second driving electrodes arranged along the same straight line in the second direction are connected by a third wire.
Compared with the prior art, the pressure sensing module and the electronic device provided by the invention have the advantages that the two capacitance sensors are arranged, the first sensing unit is mainly used for sensing smaller pressure in the first stage of pressure, and the second sensing unit is mainly used for sensing larger pressure in the second stage when the variation range of the first sensing unit is used up, so that the pressure sensing range can be expanded, the response to the pressure is improved, and the measurement precision is enhanced. Meanwhile, the pressure sensing module of the invention arranges the second sensing unit in the hollow part of the first sensing unit, thus reducing the space occupied by using two sensors and being beneficial to the miniaturization of the device.
Drawings
Fig. 1 is a schematic cross-sectional view of a display device with a pressure sensing function according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a first pressure sensing layer of the pressure sensing module of fig. 1.
FIG. 3 is a schematic structural diagram of a second pressure sensing layer of the pressure sensing module of FIG. 1.
Fig. 4 is a schematic plan view of the first pressure-sensing layer and the second pressure-sensing layer of the pressure-sensing module of fig. 1 stacked from top to bottom.
FIG. 5 is a diagram illustrating a timing control method for the pressure sensing module according to a second embodiment of the present invention.
Description of the main elements
| |
100 |
| |
10 |
| |
20 |
| Pressure sensing dieGroup of | 30 |
| First induction unit | 31 |
| A first drive electrode | 311 |
| A first |
311a |
| The first |
311b |
| A first receiving electrode | 312 |
| A second |
312a |
| Second |
312b |
| Third electrode | 313 |
| A first insulating layer | 314 |
| A second |
315 |
| |
32 |
| |
321 |
| Second receiving electrode | 322 |
| A first pressure |
323 |
| Second pressure |
324 |
| |
33 |
| |
34 |
| Pouring |
35 |
| |
36 |
| First |
37 |
| Second |
38 |
| Third conducting |
39 |
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The pressure sensing module comprises a plurality of first sensing units and a plurality of second sensing units, the pressure sensing ranges of the first sensing units and the second sensing units are only partially overlapped, the first sensing units comprise a plurality of first driving electrodes, a plurality of first receiving electrodes and a grounding electrode which are oppositely arranged, the second sensing units comprise a plurality of second driving electrodes, a plurality of second receiving electrodes and at least one pressure sensitive layer arranged between the second driving electrodes and the second receiving electrodes, and the pressure sensitive layer is made of pressure sensitive materials.
The electronic device provided by the invention has a pressure sensing function, and in a specific embodiment, the electronic device can be an electronic device with a display function, such as a mobile terminal, a tablet computer, an electronic reader, a cash dispenser, a ticket taker, a car navigator and the like, or an electronic device without a display function, such as a pressure sensor and the like.
As shown in fig. 1, an electronic device 100 with pressure sensing function according to an embodiment of the invention includes a housing module 10, a display module 20 housed in the housing module 10, and a pressure sensing module 30. In the present embodiment, the display module 20 is electrically connected to the pressure sensing module 30. In other embodiments of the present invention, the display module 20 and the pressure sensing module 30 may be independent of each other.
The receiving module 10 is used for receiving the display module 20, the pressure sensing module 30 and other components of the electronic device 100. In this embodiment, the accommodating module 10 includes a frame body having an opening, a receiving space is formed inside the frame body, and the display module 20 and the pressure sensing module 30 are stacked in the receiving space of the accommodating module 10. In the present embodiment, the display module 20 is disposed on a side of the pressure sensing module 30 away from the bottom of the accommodating module 10. In other embodiments of the present invention, the positions of the display module 20 and the pressure sensing module 30 can be reversed, or the display module 20 and the pressure sensing module 30 can be integrated together. For example, part or all of the pressure sensing module 30 is integrated into the display module 20. The accommodating module 10 may further have a cover plate for covering the accommodating space.
The display module 20 is used for displaying, and may be various displays such as an LCD display, an OLED display, a Micro-LED display, an LED display, and a plasma display. The display module 20 may be a display module with only a display function or a touch display module with an integrated touch function.
Referring to fig. 2 to 4, the pressure sensing module 30 is used for sensing the pressure applied directly thereon or transmitted thereto through other elements. The pressure sensing module 30 includes a plurality of first sensing units 31, a plurality of second sensing units 32, a first substrate 33, a second substrate 34, and a potting compound 35. The first sensing units 31 and the second sensing units 32 have different pressure sensing ranges, and the pressure sensing ranges of the first sensing units and the second sensing units are partially overlapped, so that the pressure sensing module 30 has a larger pressure sensing range. Specifically, the pressure sensing range of the first sensing unit 31 includes a first minimum value and a first maximum value, and the pressure sensing range of the second sensing unit 32 includes a second minimum value and a second maximum value, wherein the first minimum value is smaller than the second minimum value, and the first maximum value is greater than or equal to the second minimum value and smaller than the second maximum value. The first substrate 33 and the second substrate 34 are disposed opposite to each other at an interval, and at least a part of the structures of the plurality of first sensing units 31 and the plurality of second sensing units 32 are disposed on the first substrate 33 and the second substrate 34. The potting compound 35 is disposed around the edges of the first substrate 33 and the second substrate 34 to support the space between the first substrate 33 and the second substrate 34.
In this embodiment, the first sensing units 31 may adopt a mutual capacitance type capacitance sensing mode, and the second sensing units 32 may adopt a self-capacitance type capacitance sensing mode. In other embodiments, other modes or combinations may be used. The structure of the representative embodiment of the first sensing unit 31 will be described in detail below in a mutual capacitance sensing mode. Each of the first sensing cells 31 includes a first driving electrode 311, a first receiving electrode 312, and a third electrode 313. The electrodes of the first sensing cells 31 may be completely independent or partially independent and partially share the electrode, for example, the third electrode 313 is shared by the first sensing cells 31, and the first driving electrode 311 and the first receiving electrode 312 are disposed independently. The first driving electrode 311 receives a driving signal generated by an external system, the first receiving electrode 312 is used for generating a sensing signal, and the third electrode 313 has a constant potential, such as a ground arrangement. Each first driving electrode 311 has a first receiving electrode 312 and a third electrode 313 arranged opposite to the first driving electrode 311, and the first receiving electrode 312 is located between the first driving electrode 311 and the third electrode 313, thereby forming a mutual capacitance type capacitor structure. Preferably, the third electrode 313 is disposed on a side of the first receiving electrode 312 away from the first driving electrode 311, and a compressible gap is formed between the third electrode and the plurality of first receiving electrodes 312. In addition, the plurality of first driving electrodes 311 may be located on the same layer and arranged in a specific rule, such as a matrix arrangement, and the first driving electrodes 311 located on the same row are electrically connected through a connection line. The plurality of first receiving electrodes 312 may be disposed on the same layer and arranged in a specific rule, such as a matrix arrangement, and the first driving electrodes 311 disposed on the same column are electrically connected through a connection line. Specifically, the plurality of first driving electrodes 311 are arranged in an array on one surface of the first substrate 33. The first receiving electrodes 312 are also arranged in an array on the surface of the second substrate 34 opposite to the first substrate 33. The third electrode 313 is disposed on the second substrate 34 away from the first substrate 33, and a gap 36 is formed between the third electrode 313 and the second substrate 34. The first receiving electrode 312 has the same shape as the first driving electrode 311, however, the first receiving electrode 312 has a hollow pattern for allowing electric lines to pass through, and in this embodiment, the hollow pattern is a rectangle with the same size and arranged continuously. In the present invention, the shape, arrangement and size of the hollow pattern are not particularly limited, as long as the hollow pattern is formed on the first receiving electrode 312, so that the third electrode 313 of the first driving electrode 311 above the first receiving electrode 312 can form a capacitive electric field. The size of the first driving electrode 311 may be slightly larger than that of the first receiving electrode 312 to shield an electric field from above the first driving electrode 311, such as the display module 20, to isolate interference signals.
The first drive electrode 311 and the first receive electrode 312 in this embodiment are substantially rectangular in outline. In other embodiments of the present invention, the outlines of the first driving electrode 311 and the first receiving electrode 312 may be in other shapes such as a circle, a triangle, or a polygon. The third electrode 313 may be a ground conductor such as, but not limited to, a metal sheet. In the present embodiment, the third electrode 313 is a frame for supporting in the electronic device 100, and also has a function of shielding the interference below. The height of the gap 36 formed between the third electrode 313 and the second substrate 34 is about 50 μm to 500 μm, preferably 150 μm to 350 μm. In the present embodiment, the height of the gap 36 is 250 μm.
In other embodiments of the present invention, the third electrode 313 may also be a conductor configured to implement a pressure touch function, and certainly may also be a grounding conductor inherent in the electronic device 100, for example, a metal frame of a backlight module.
Each of the second sensing cells 32 includes a second driving electrode 321 and a second receiving electrode 322 disposed corresponding thereto. Preferably, the electrodes between the plurality of second sensing units 32 are independent of each other. The plurality of second driving electrodes 321 are disposed on one surface of one of the first substrate 33 and the second substrate 34, and the plurality of second receiving electrodes 322 are disposed on one surface of the other of the first substrate 33 and the second substrate 34. Preferably, the second driving electrode 321 is located on the surface of the second substrate 34 and the surface is provided with the first receiving electrode 312 of the first sensing unit 31, and the second receiving electrode 322 is located on the surface of the first substrate 33 and the surface is provided with the first driving electrode 311 of the first sensing unit 31. The second driving electrode 321 has the same shape as the second receiving electrode 322. The second driving electrode 321 is larger than the second receiving electrode 322 to shield the interference of the electric field from the lower portion of the second driving electrode 321 to the second receiving electrode 322, such as the electric field of the third electrode 313, and simultaneously isolate the interference signal. The second driving electrode 321 and the second receiving electrode 322 are rectangular in shape. In other embodiments of the present invention, the second driving electrode 321 and the second receiving electrode 322 may also be circular, triangular or polygonal. In addition, the plurality of second driving electrodes 321 may be located in the same layer and arranged in a specific rule, such as a matrix arrangement, and the second driving electrodes 321 located in the same row are electrically connected through a connection line. The second receiving electrodes 322 may be disposed on the same layer and arranged in a specific rule, such as a matrix arrangement, and the second driving electrodes 321 disposed on the same column are electrically connected by a connection line.
Preferably, the first driving electrode 311 of the first sensing unit 31 and the second receiving electrode 322 of the second sensing unit 32 are disposed at the same layer and spaced apart from each other. At least a portion of the first driving electrodes 311 have second receiving electrodes 322 disposed corresponding thereto. Specifically, one first driving electrode 311 may completely surround or partially surround the second receiving electrode 322. In the present embodiment, the first driving electrode 311 is C-shaped and surrounds three sides of the second receiving electrode 322. Specifically, the first driving electrode 311 includes a first opening 311a and a first hollow 311b connected to the first opening 311 a. A second receiving electrode 322 is disposed in the first hollow portion 311b of each first driving electrode 311, and a gap exists between the first driving electrode 311 and the second receiving electrode 322. The plurality of first driving electrodes 311 and the plurality of second receiving electrodes 322 arranged in a line along the first direction are electrically connected by a first wire 37. The first conductive line 37 extends to the edge of the first substrate 33 and is connected to the display module 20. In other embodiments of the present invention, the plurality of first driving electrodes 311 and the plurality of second receiving electrodes 322 may also be connected by two wires.
Similarly, the first receiving electrode 312 and the second driving electrode 321 are disposed at the same layer, and the first receiving electrode 312 may completely surround or partially surround the second driving electrode 321. In the present embodiment, the first receiving electrode 312 has a C-shape and surrounds three sides of the second driving electrode 321. Specifically, the first receiving electrode 312 includes a second opening 312a and a second hollow 312b connected to the second opening 312 a. A second driving electrode 321 is disposed in the second hollow portion 312b of each first receiving electrode 312, and a gap exists between the first receiving electrode 312 and the second driving electrode 321. The plurality of first receiving electrodes 312 arranged in a straight line along the second direction are electrically connected by the second conductive line 38, and the plurality of second driving electrodes 321 arranged in a straight line along the second direction are electrically connected by the third conductive line 39. In this embodiment, the second direction is perpendicular to the first direction. The second conductive lines 38 and the third conductive lines 39 extend to the edge of the second substrate 34 and are connected to the display module 20. The third lead wire 39 is provided on the second opening 312a side. In other embodiments, if the time-sharing driving method is adopted, the first receiving electrode 312 and the second driving electrode 321 may be connected by only one second wire 38.
In this embodiment, the first driving electrode 311 only partially surrounds the second receiving electrode 322, and in other embodiments of the present invention, the first driving electrode 311 may completely surround the second receiving electrode 322, that is, the first driving electrode 311 only includes the first hollow portion 311b without the first opening portion 311a, and the second receiving electrode 322 is accommodated in the first hollow portion 311b of the first driving electrode 311. Similarly, the first receiving electrode 312 may completely surround the second driving electrode 321, and the second driving electrode 321 is accommodated in the second hollow portion 312b of the first receiving electrode 312. In such an embodiment, the first receiving electrode 312 and the second driving electrode 321 may be connected by only one second conductive line 38, or a plurality of first receiving electrodes 312 are electrically connected by the second conductive line 38, the second driving electrode 321 is connected by the third conductive line 39, but the third conductive line 39 extends out of the space between the second driving electrode 321 and the first receiving electrode 312. Although in the present embodiment, the first driving electrode 311 surrounds the second receiving electrode 322 in a C shape to reduce the area occupied by the first driving electrode 311 and the second receiving electrode 322. In other embodiments of the present invention, the positional relationship between the first driving electrode 311 and the second receiving electrode 322 is not limited to that of the present embodiment, and may be, for example, parallel to each other. Similarly, the positional relationship between the first receiving electrode 312 and the second driving electrode 321 is not limited to the relationship of the present embodiment, and may be, for example, parallel to each other.
The first driving electrode 311, the second receiving electrode 322, the first receiving electrode 312, and the second driving electrode 321 are made of a capacitive electrode plate material such as metal, metal oxide, conductive polymer, or the like. The first conductive line 37, the first driving electrode 311, and the second receiving electrode 322 may be made of the same material and may be formed in the same process. The second conductive line 38, the third conductive line 39, the second receiving electrode 322 and the second driving electrode 321 may be made of the same material and may be formed in the same process.
The first sensing unit 31 further includes a first insulating layer 314 and a second insulating layer 315, the first insulating layer 314 covering the first driving electrode 311, the second insulating layer 315 covering the first receiving electrode 312, and the first insulating layer 314 and the second insulating layer 315 directly contact each other. In other embodiments of the present invention, the first insulating layer 314 and the second insulating layer 315 are not in contact with each other but are formed with a gap. The first and second insulating layers 314 and 315 are filled, in whole or in part, with an insulating material such as ceramic, glass frit, mica, or the like.
In other embodiments of the present invention, the first sensing unit 31 may include only one insulating layer, and a surface of one of the first driving electrode 311 and the first receiving electrode 312 serves as a dielectric layer between the first driving electrode 311 and the first receiving electrode 312.
The second sensing unit 32 further includes a first pressure sensitive layer 323 and a second pressure sensitive layer 324, and the first pressure sensitive layer 323 and the second pressure sensitive layer 324 are formed of a pressure sensitive material on the surfaces of the second driving electrode 321 and the second receiving electrode 322, respectively. In this embodiment, the first pressure sensitive layer 323 and the second pressure sensitive layer 324 are in contact with each other at least when subjected to a range of pressures. In other embodiments of the present invention, the first pressure sensitive layer 323 and the second pressure sensitive layer 324 are not in contact with each other but are formed with a gap. In such an embodiment, the first insulating layer 314 and the second insulating layer 315 are formed with a gap, and the gap between the first insulating layer 314 and the second insulating layer 315 is larger than the gap between the first pressure sensitive layer 323 and the second pressure sensitive layer 324, so that when the electronic device 100 receives an external force, the first pressure sensitive layer 323 and the second pressure sensitive layer 324 may interact to generate strain to cause a change in dielectric constant. The physical properties of the pressure sensitive material change when strained by pressure, thereby changing the dielectric characteristics thereof, and thus changing the capacitance of the second sensing element 32. For example, but not limited to, the resistance or dielectric constant of the pressure sensitive material may change as the pressure changes. Specifically, the pressure sensitive material may be, for example, but not limited to, PZT, PDVF, or the pressure sensitive material may be, for example, but not limited to, single crystal silicon, polycrystalline silicon, or a metallic multi-component material such as NiCr alloy, etc. In this embodiment, a description will be given taking as an example that the dielectric constant of the pressure-sensitive material changes with a change in pressure. The pressure sensitive material is typically an insulating material with a relatively high dielectric constant.
In other embodiments of the present invention, the second sensing unit 32 may include only one pressure sensitive layer disposed on a surface of one of the second driving electrode 321 and the second receiving electrode 322, and the physical property of the pressure sensitive layer is changed by applying pressure to the pressure sensitive layer through the second driving electrode 321 and the second receiving electrode 322 so as to change the capacitance between the second driving electrode 321 and the second receiving electrode 322. In the present embodiment, the pressure sensitive material is formed on the second driving electrode 321 and the second receiving electrode 322. Therefore, a large capacitance change can be measured with only a small area, and therefore, the size of the first driving electrode 311 is larger than that of the second receiving electrode 322, and the size of the first receiving electrode 312 is larger than that of the second driving electrode 321 in this embodiment.
The first substrate 33 and the second substrate 34 may be glass substrates or plastic substrates. In the present embodiment, the first substrate 33 and the second substrate 34 are plastic substrates formed of polyethylene terephthalate (PET). The thickness of the first substrate 33 and the second substrate 34 is 10-100 um, and in this embodiment, the thickness of the first substrate 33 and the thickness of the second substrate 34 are both 38 μm.
The potting adhesive 35 is located between the first substrate 33 and the second substrate 34, and is disposed along edges of the first substrate 33 and the second substrate 34. The pouring sealant 35 can be electronic glue for sealing, and the pouring sealant 35 can be made of: epoxy resin pouring sealant, single-component epoxy resin pouring sealant, two-component epoxy resin pouring sealant, silicone rubber pouring sealant, room temperature vulcanized silicone rubber, two-component addition type silicone rubber pouring sealant or two-component condensation type silicone rubber pouring sealant and the like.
The operation principle of the electronic device 100 with a pressure sensing module according to the present invention is described below.
When the electronic device 100 is pressed by an external force, the mutual capacitance of the first driving electrode 311, the first receiving electrode 312 and the third electrode 313 can detect the position of the touch point.
Furthermore, when the electronic device 100 is pressed by an external force, the potting adhesive 35 is disposed between the first substrate 33 and the second substrate 34, so that the electronic device is not easily compressed. And the gap 36 between the second substrate 34 and the third electrode 313 is filled with air, the shrinking speed of the gap 36 between the second substrate 34 and the third electrode 313 is much faster than that of the first substrate 33 and the second substrate 34, and it is the gap 36 between the second substrate 34 and the third electrode 313 that is compressed first, and the reduction of the gap 36 causes the capacitance C1 of the first sensing unit to become smaller. The stress of the electronic device 100 is converted by measuring the variation of the capacitance C1 of the first sensing unit. During this time, the capacitance C2 of the second sensing element is unchanged. Generally, 0-500 g of force, i.e. 0-5N of force, can be sensed at this stage.
When the gap 36 between the second substrate 34 and the third electrode 313 is reduced to a certain extent, the capacitance C1 of the first sensing unit stops changing. The interaction of the first pressure sensitive layer 323 and the second pressure sensitive layer 324 to generate strain causes the dielectric constants of the first pressure sensitive layer 323 and the second pressure sensitive layer 324 to change, thereby causing the capacitance C2 of the second sensing element to change. In this embodiment, the dielectric constants of the first pressure-sensitive layer 323 and the second pressure-sensitive layer 324 become larger, so that the capacitance C2 of the second sensing unit becomes larger, and the amount of the stress applied to the electronic device 100 at this stage is converted by measuring the variation of the capacitance C2 of the second sensing unit. During this time, the capacitance C2 of the second sensing element is unchanged. Generally, 500-10000 g of force, i.e., 5-100N of force, can be sensed at this stage.
Compared with the prior art, the pressure sensing module and the electronic device have the advantages that the two capacitance sensors are arranged, the first sensing unit 31 is used for sensing smaller pressure in the first stage of pressure, and the second sensing unit 32 is used for sensing larger pressure in the second stage when the variation range of the first sensing unit 31 is used up, so that the pressure sensing range can be expanded, the response to the pressure is improved, and the measurement accuracy is enhanced. Meanwhile, the pressure sensing module of the present invention has the second sensing unit 32 disposed in the hollow portion of the first sensing unit 31, so as to reduce the space occupied by the two sensors, thereby facilitating the miniaturization of the device.
It should be noted that the plurality of first driving electrodes 311 and the plurality of second receiving electrodes 322 are connected by the first wires 37. Therefore, in actual operation of the electronic device 100 of the present invention, it is necessary to shift the transmission period of the first driving electrode 311 and the reception period of the second receiving electrode 322 so as to shift the scanning periods of the first sensing unit and the second sensing unit. In the embodiment where the plurality of second driving electrodes 321 and the plurality of first receiving electrodes 312 are connected by the same wire, it is also necessary to shift the transmission period of the second driving electrodes 321 and the receiving unit of the first receiving electrodes 312 by a time-sharing timing control method so as to shift the scanning periods of the first sensing units and the second sensing units.
Therefore, the second embodiment of the present invention further provides a timing control method for the electronic device 100 with the pressure sensing module according to the first embodiment, which is described below with reference to an embodiment in which the plurality of first driving electrodes 311 and the plurality of second receiving electrodes 322 are connected by the first conductive lines 37, and the plurality of second driving electrodes 321 and the plurality of first receiving electrodes 312 are connected by the second conductive lines 38 and the third conductive lines 39, respectively.
Referring to fig. 5, the timing control method according to the second embodiment of the present invention continuously and alternately performs a first sensing unit scanning period and a second sensing unit scanning period in a scanning time. Fig. 5 is a diagram of a frame time, which is divided into a first sensing unit scanning period and a second sensing unit scanning period. In the first sensing cell scanning period, an electric signal is input to the first driving electrode 311 to emit an electric field, and at this time, the second driving electrode 321 is supplied with a constant voltage, for example, but not limited to, a ground voltage, and the first receiving electrode 312 outputs an electric signal, and in the second sensing cell scanning period C2, the second receiving electrode 322 outputs an electric signal, and the first receiving electrode 312 is supplied with a constant voltage, for example, but not limited to, a ground voltage, and an electric signal is input to the second driving electrode 321 to emit an electric field. During the operation of the electronic device 100 with pressure sensing function according to the embodiment of the invention, the pressure sensing data is obtained by the continuous alternate scanning of the first sensing unit scanning period C1 and the second sensing unit scanning period C2.
Claims (14)
1. A pressure sensing module, its characterized in that: the induction heating device comprises a plurality of first induction units, a plurality of second induction units, a first substrate, a second substrate and pouring sealant, wherein the first substrate and the second substrate are arranged at intervals, the pouring sealant surrounds the edges of the first substrate and the second substrate to support the space between the first substrate and the second substrate, the first induction units comprise third electrodes, first driving electrodes and first receiving electrodes, the first driving electrodes and the first receiving electrodes are arranged oppositely, the first driving electrodes are arranged on one surface of one substrate of the first substrate and the second substrate, the first receiving electrodes are arranged on one surface of the other substrate of the first substrate and the second substrate, the third electrodes are arranged on one side, far away from the first substrate, of the second substrate, a gap is formed between the third electrodes and the second substrate, and when the gap is pressed, the reduction speed of the gap is far larger than that of the gap between the first substrate and the second substrate The second sensing unit comprises a second driving electrode and a second receiving electrode which are arranged oppositely, and at least one pressure sensitive layer arranged between the second driving electrode and the second receiving electrode, the pressure sensitive layer is made of pressure sensitive materials, a first pressure sensitive layer is arranged on one surface, close to the second receiving electrode, of the second driving electrode, a second pressure sensitive layer is arranged on one surface, close to the second driving electrode, of the second receiving electrode, the second driving electrode is located on the surface of the substrate where the first receiving electrode is located, the second receiving electrode is located on the surface of the substrate where the first driving electrode is located, the first driving electrode partially surrounds or completely surrounds the second receiving electrode, and the first receiving electrode partially surrounds or completely surrounds the second driving electrode, the first driving electrode is larger than the second receiving electrode in size, and the first receiving electrode is larger than the second driving electrode in size.
2. The pressure sensing module of claim 1, wherein: the physical property of the pressure sensitive material is changed after the pressure sensitive material is subjected to strain generated by pressure, so that the capacitance of the second driving electrode and the second receiving electrode is changed.
3. The pressure sensing module of claim 2, wherein: the dielectric constant or resistance of the pressure sensitive material is changed after the pressure sensitive material is subjected to strain generated by pressure, so that the capacitance of the second driving electrode and the second receiving electrode is changed.
4. The pressure sensing module of claim 3, wherein: the first pressure sensitive layer and the second pressure sensitive layer are in contact with each other or have a certain interval.
5. The pressure sensing module of claim 1, wherein: the plurality of first sensing units are mutual capacitance type capacitors, the first receiving electrode is arranged between the first driving electrode and the third electrode, a compressible gap is formed between the third electrode and the first receiving electrode, and the plurality of first sensing units share the third electrode.
6. The pressure sensing module of claim 1, wherein: the first driving electrode and the second receiving electrode are arranged on the same layer, and the second driving electrode and the first receiving electrode are arranged on the same layer.
7. The pressure sensing module of claim 6, wherein: the first driving electrode includes a first hollow portion, the first receiving electrode includes a second hollow portion, the second receiving electrode is disposed in the first hollow portion, and the second driving electrode is disposed in the second hollow portion.
8. The pressure sensing module of claim 6, wherein: the first receiving electrode is of a hollow structure, so that an electric field emitted by the first driving electrode can penetrate through the first receiving electrode.
9. The pressure sensing module of claim 1, wherein: the first driving electrode is larger than the first receiving electrode in size, and the second driving electrode is larger than the second receiving electrode in size.
10. The pressure sensing module of claim 1, wherein: at least one insulating layer is formed between the first driving electrode and the first receiving electrode.
11. An electronic device comprising the pressure sensing module according to any one of claims 1-10.
12. The electronic device of claim 11, wherein: the pressure sensing module is arranged in the accommodating module, and the display module is electrically connected with the pressure sensing module.
13. A timing control method for the pressure sensing module according to any one of claims 1 to 10, wherein: the scanning time is divided into a plurality of first sensing unit scanning periods and a plurality of second sensing unit scanning periods, each first sensing unit scanning period and each second sensing unit scanning period are alternately carried out, in the first sensing unit scanning period, an electric signal is input to the first driving electrode to enable the first driving electrode to emit an electric field, a constant voltage is provided to the second driving electrode, an electric signal is output by the first receiving electrode, in the second sensing unit scanning period, the second receiving electrode outputs the electric signal to enable the first receiving electrode to provide the constant voltage, and an electric signal is input to the second driving electrode to enable the second driving electrode to emit the electric field.
14. The timing control method of claim 13, wherein: the plurality of first driving electrodes and the plurality of second receiving electrodes arranged along the same straight line in the first direction are connected through first wires, the plurality of first receiving electrodes arranged along the same straight line in the second direction are connected through second wires, and the plurality of second driving electrodes arranged along the same straight line in the second direction are connected through third wires.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710032503.0A CN106886334B (en) | 2017-01-16 | 2017-01-16 | Pressure sensing module, electronic device and time sequence control method |
| TW106106195A TWI641980B (en) | 2017-01-16 | 2017-02-23 | Force sensing module, electronic device and timing control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710032503.0A CN106886334B (en) | 2017-01-16 | 2017-01-16 | Pressure sensing module, electronic device and time sequence control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106886334A CN106886334A (en) | 2017-06-23 |
| CN106886334B true CN106886334B (en) | 2020-06-09 |
Family
ID=59175701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710032503.0A Active CN106886334B (en) | 2017-01-16 | 2017-01-16 | Pressure sensing module, electronic device and time sequence control method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106886334B (en) |
| TW (1) | TWI641980B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111522462A (en) * | 2020-04-15 | 2020-08-11 | 业成科技（成都）有限公司 | Pressure sensing display module and panel |
| CN113760116A (en) * | 2020-06-05 | 2021-12-07 | 富泰华工业（深圳）有限公司 | Capacitive pressure sensing device, pressure sensing panel and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568243A (en) * | 2013-10-24 | 2015-04-29 | 亚太优势微系统股份有限公司 | Composite range pressure sensor |
| CN105117080A (en) * | 2015-08-07 | 2015-12-02 | 业成光电（深圳）有限公司 | Touch apparatus integrating pressure-sensing function |
| JP2016003991A (en) * | 2014-06-18 | 2016-01-12 | 大日本印刷株式会社 | Pressure sensor device |
| CN105760006A (en) * | 2015-11-17 | 2016-07-13 | 业成光电（深圳）有限公司 | Touch display device |
| CN105988635A (en) * | 2015-03-20 | 2016-10-05 | 禾瑞亚科技股份有限公司 | Pressure sensing touch panel, pressure sensing method, electronic device and control unit |
| CN106249946A (en) * | 2016-07-22 | 2016-12-21 | 业成科技（成都）有限公司 | Condenser type pressure sensitivity display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5347913B2 (en) * | 2009-11-06 | 2013-11-20 | ソニー株式会社 | SENSOR DEVICE, ELECTRONIC DEVICE, AND METHOD FOR MANUFACTURING SENSOR DEVICE |
| US9201468B2 (en) * | 2013-06-28 | 2015-12-01 | Synaptics Incorporated | Device and method for proximity sensing with force imaging |
| JP2015088331A (en) * | 2013-10-30 | 2015-05-07 | パナソニックＩｐマネジメント株式会社 | Pressure-sensitive switch and manufacturing method thereof, touch panel including pressure-sensitive switch and manufacturing method thereof |
| US9841850B2 (en) * | 2014-06-16 | 2017-12-12 | Synaptics Incorporated | Device and method for proximity sensing with force imaging |
-
2017
- 2017-01-16 CN CN201710032503.0A patent/CN106886334B/en active Active
- 2017-02-23 TW TW106106195A patent/TWI641980B/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568243A (en) * | 2013-10-24 | 2015-04-29 | 亚太优势微系统股份有限公司 | Composite range pressure sensor |
| JP2016003991A (en) * | 2014-06-18 | 2016-01-12 | 大日本印刷株式会社 | Pressure sensor device |
| CN105988635A (en) * | 2015-03-20 | 2016-10-05 | 禾瑞亚科技股份有限公司 | Pressure sensing touch panel, pressure sensing method, electronic device and control unit |
| CN105117080A (en) * | 2015-08-07 | 2015-12-02 | 业成光电（深圳）有限公司 | Touch apparatus integrating pressure-sensing function |
| CN105760006A (en) * | 2015-11-17 | 2016-07-13 | 业成光电（深圳）有限公司 | Touch display device |
| CN106249946A (en) * | 2016-07-22 | 2016-12-21 | 业成科技（成都）有限公司 | Condenser type pressure sensitivity display device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI641980B (en) | 2018-11-21 |
| TW201828015A (en) | 2018-08-01 |
| CN106886334A (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108885149B (en) | Pressure detection device | |
| JP6698389B2 (en) | Display device and display method | |
| CN105117058B (en) | A kind of touch panel, touch-control display panel and electronic equipment | |
| CN106066727B (en) | Touch screen, touch panel, display device and electronic instrument | |
| TWI605369B (en) | Mutual capacitive force sensor and touch display device with force sensing function and force sensing method thereof | |
| US8937607B2 (en) | Capacitive touch panel with dynamically allocated electrodes | |
| CN105549790B (en) | A kind of pressure-sensing touch module | |
| US9348470B2 (en) | Projected capacitance touch panel with reference and guard electrode | |
| KR100559094B1 (en) | Surface pressure distribution sensor | |
| US10216344B2 (en) | In-cell touch panel, method for driving the same, and display device | |
| CN102103445A (en) | Sensor apparatus and information processing apparatus | |
| TWI675191B (en) | Display integrated input device | |
| CN105929577B (en) | Display panel, display device and manufacturing method of display panel | |
| US9626048B2 (en) | Touch screen and related touch sensing control circuit | |
| CN106843580B (en) | Display device | |
| CN107544701B (en) | Capacitive touch pressure sensor constructed from flexible substrate | |
| US20190121484A1 (en) | Display panel, display device and force touch method | |
| CN108196723B (en) | Display panel | |
| KR20160053919A (en) | Sensor device, input device, and electronic device | |
| CN106383607A (en) | Touch display system with pressure sensing function | |
| CN106886334B (en) | Pressure sensing module, electronic device and time sequence control method | |
| US11243633B2 (en) | Pressure sensing module, touch panel and method of detecting two-point touch pressure of touch panel | |
| US10191604B2 (en) | Sensing device and method with functions of force measurement, touch control and fingerprint identification | |
| CN107678217B (en) | Liquid crystal display panel and liquid crystal display device | |
| JP2013217679A (en) | Load detection device, input device using the same and method for manufacturing the input device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180816 Address after: 610041 689 cooperation Road, hi-tech West District, Chengdu, Sichuan Applicant after: Cheng Cheng Technology (Chengdu) Co., Ltd. Applicant after: Interface Optoelectronic (Shenzhen) Co., Ltd. Address before: 518057 Room 201, building A, 1 Bay Road, Shenzhen Hong Kong cooperation zone, Qianhai, Shenzhen, Guangdong, Nanshan District Applicant before: MIICS BUSINESS CONSULTING (SHENZHEN) CO., LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |