CN116501186A - Electronic device with pressure sensing function, pressure sensing unit thereof and capacitance sensing control method thereof - Google Patents
Electronic device with pressure sensing function, pressure sensing unit thereof and capacitance sensing control method thereof Download PDFInfo
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- CN116501186A CN116501186A CN202210294489.2A CN202210294489A CN116501186A CN 116501186 A CN116501186 A CN 116501186A CN 202210294489 A CN202210294489 A CN 202210294489A CN 116501186 A CN116501186 A CN 116501186A
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- 238000000034 method Methods 0.000 title claims description 22
- 239000010410 layer Substances 0.000 claims description 83
- 230000006698 induction Effects 0.000 claims description 20
- 239000011241 protective layer Substances 0.000 claims description 5
- 238000004378 air conditioning Methods 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Measuring Fluid Pressure (AREA)
- Electronic Switches (AREA)
Abstract
The invention relates to an electronic device with pressure sensing and a pressure sensing unit thereof, wherein the electronic device is provided with a first electrode layer and a second electrode layer which are stacked, the first electrode layer is positioned above the second electrode layer, a control unit alternately executes a first mode and a second mode, the first mode enables the first electrode layer to be grounded and enables the second electrode layer to conduct self-capacitance sensing, the second mode enables the first electrode layer to conduct self-capacitance sensing and enables the second electrode layer to be grounded, and the sensing quantity which is influenced by pressure independently is obtained by the shielding effect formed by the first electrode layer when in the first mode, and the sensing quantity containing touch information is obtained by the second mode, so that pressure events or touch events which are required to be triggered by a user are effectively distinguished.
Description
Technical Field
The present invention relates to an electronic device with touch sensing, and more particularly, to an electronic device with pressure sensing function.
Background
In the prior art, an electronic device with both touch sensing and pressure sensing is provided with a sensing electrode layer above a grounding electrode layer, and performs self-capacitance sensing, when a touch object contacts a housing arranged on the sensing electrode layer, the contact will generate a sensing capacitance change, and meanwhile, force application will also cause deformation of the sensing electrode layer to generate a sensing capacitance change, and the sensing capacitance change generated by the contact and deformation will be transmitted to a control unit at the same time, and the control unit determines the pressure and the contact area applied by the touch object by the sensing capacitance change.
However, since the sensing capacitance variation received by the control unit includes both the contact and the pressure information, it is not easy for the control unit to distinguish whether the gesture or event to be triggered by the user is mainly contact or pressure. For example, when the user applies a force with a light force to trigger a pressing gesture, the sensing amount provided by the pressure generated by the light force is small, but the contact area may provide a large sensing amount, so that the control unit may be misjudged as no action; or when the user wants to trigger the sliding gesture with a larger force, the control unit may misjudge the sliding gesture because the pressure and the contact area provide a larger sensing amount.
Disclosure of Invention
In view of this, how to distinguish whether the received change in the induced capacitance is from contact or from pressure information is a problem to be solved in the prior art.
In order to achieve the above object, the present invention provides a pressure sensing unit, which includes:
a control unit;
a first electrode layer electrically connected with the control unit;
the second electrode layer is electrically connected with the control unit and is arranged at one side of the first electrode layer;
wherein, the control unit executes a first mode and a second mode:
in the first mode, the first electrode layer is electrically connected with a grounding end or a fixed potential, and self-capacitance induction is carried out on the second electrode layer to obtain a first induction quantity;
in the second mode, the second electrode layer is electrically connected with a grounding end or a fixed potential, and self-capacitance induction is carried out on the first electrode layer to obtain a second induction quantity;
the first sensing quantity is used as pressure information, and the second sensing quantity is used as touch information.
Furthermore, an electronic device having the pressure sensing unit is provided, which is provided with a housing for accommodating the pressure sensing unit, and a protective layer covering the first electrode layer.
Further, a capacitive sensing control method including pressure sensing is provided for a pressure sensing unit having a first electrode layer and a second electrode layer, the control method including the steps of:
executing a first mode, electrically connecting the first electrode layer to a grounding terminal or a fixed potential, and performing self-capacitance induction on the second electrode layer to obtain a first induction quantity; a kind of electronic device with high-pressure air-conditioning system
Executing a second mode, electrically connecting the second electrode layer to a grounding terminal or a fixed potential, and performing self-capacitance induction on the first electrode layer to obtain a second induction quantity;
the first sensing quantity is used as pressure information, and the combination of the second sensing quantity is used as touch information.
The invention has the advantages that different sensing amounts are obtained by switching different modes so as to distinguish the pressure information from the touch information, so that the operation executed by the user is distinguished as a pressure event or a touch event, the operation really desired by the user is effectively reflected, and the user experience is further improved.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
FIG. 1 is a schematic diagram of a pressure sensing unit of the present invention;
FIG. 2 is a schematic diagram illustrating a usage state of the electronic device according to the present invention;
FIG. 3A is a timing diagram of a first embodiment of an execution program according to the present invention;
FIG. 3B is a timing diagram illustrating a second embodiment of the execution procedure according to the present invention;
FIG. 4 is a schematic diagram of the pressure sensing unit of the present invention in a first mode during a pressing event;
FIG. 5 is a schematic diagram of the pressure sensing unit of the present invention in a second mode during a pressing event;
FIG. 6 is a schematic diagram of the pressure sensing unit in a first mode in a touch event according to the present invention;
fig. 7 is a schematic diagram of the pressure sensing unit in a second mode in a touch event.
Wherein, the reference numerals:
1 sensing unit
2 electronic device
10 control unit
20 first electrode layer
25 deformable unit
30 second electrode layer
40 casing body
50 protective layer
60 touch object
M1 first mode
M2 second mode
Detailed Description
The structural and operational principles of the present invention are described in detail below with reference to the accompanying drawings:
the technical means adopted by the present invention to achieve the intended purpose of the present invention will be further described below with reference to the drawings, which are simplified for illustration purposes only, and the structure or method of the present invention will be described by describing the relationship between the elements and components of the present invention, so that the elements shown in the drawings are not represented in actual numbers, actual shapes, actual sizes, and actual proportions, the sizes or proportions of the sizes have been enlarged or simplified, thereby providing a better description, the actual numbers, actual shapes, or actual proportions of the sizes have been selectively designed and configured, and the detailed layout of the elements may be more complicated.
Referring to fig. 1, the pressure sensing unit 1 of the present invention includes a control unit 10, a first electrode layer 20, and a second electrode layer 30. The first electrode layer 20 is electrically connected to the control unit 10, the second electrode layer 30 is electrically connected to the control unit 10, and the second electrode layer 30 is disposed on one side of the first electrode layer 20.
Referring to fig. 1 and 2, the electronic device 2 of the present invention has the pressure sensing unit 1, and the electronic device 2 further has a housing 40 and a protection layer 50, wherein the pressure sensing unit 1 is disposed on the housing 40, and the protection layer 50 is disposed on the surface of the housing 40 and covers the first electrode layer 20. In one embodiment, the first electrode layer 20 and the second electrode layer 30 each comprise a plurality of sensing electrodes and have a deformable unit 25 located between the first and second electrode layers 20, 30; when a touch object 60 contacts the protective layer 50, the first electrode layer 20 or the second electrode layer 30 generates a capacitance change due to the touch position of the touch object 60, and a corresponding sensing amount is obtained by the capacitance change; in addition, when the protective layer 50 is stressed, the deformable unit 25 is compressed and deformed, and the deformation amount causes the distance between the first and second electrode layers 20 and 30 to change to generate a capacitance change, so that the sensing amount corresponding to the pressure information is obtained by the capacitance change amount. In an embodiment, the electronic device 2 may be an electronic device of a wearable device such as a stylus, a touch pad, a touch screen, glasses with touch function, or VR device.
Referring to fig. 1, 3A and 3B, the control unit 10 executes an execution program, where the execution program includes x times of a first mode M1 and y times of a second mode M2, where x and y are positive integers greater than or equal to 1, and x and y may be equal or unequal, and in each of the execution programs, the first mode M1 may be executed first or the second mode M2 may be executed first. In one embodiment (as shown in fig. 3A), the control unit 10 executes the execution process multiple times in succession, wherein each execution process includes a first mode M1 and a second mode M2. In another embodiment (as shown in fig. 3B), the control unit 10 executes the execution process multiple times in succession, and each execution process includes a second first mode M1 and a second mode M2.
In the first mode M1, the control unit 10 electrically connects the first electrode layer 20 to a ground terminal or a fixed potential, and performs self-capacitance sensing on the second electrode layer 30 to obtain a first sensing amount, and since the first electrode layer 20 is located between the protection layer 50 and the second electrode layer 30 and the first electrode layer 20 is connected to a ground terminal or a fixed potential at this time, the first electrode layer 20 forms a shielding effect, so that the second electrode layer 30 does not generate capacitance changes due to touch actions such as approaching or contact movement of the touch object 60, and thus the sensing result is affected, and the first sensing amount generated by the second electrode layer 30 is only from capacitance changes caused by deformation generated by stress of the first electrode layer 20, so the first sensing amount can be used as pressure information.
In the second mode M2, the control unit 10 electrically connects the second electrode layer 30 to a ground terminal or a fixed potential, and performs self-capacitance sensing on the first electrode layer 20 to obtain a second sensing amount, and at this time, the touch actions such as approaching or contact movement of the touch object 60 all cause the capacitance change of the first electrode layer 20, so that the second sensing amount generated by the first electrode layer 20 can be used as touch information. In an embodiment, in the second mode M2, the pressing force of the touch object 60 is also deformed to change the capacitance, so the second sensing amount as the touch information includes the touch behavior from the touch object 60 and the behavior from the external pressure. Then, the first sensing amount and the second sensing amount are further compared to find out a sensing result of the touch behavior corresponding to the touch object 60 without pressure information, for example, subtracting the first sensing amount from the second sensing amount, and removing the sensing result affected by pressure in the second sensing amount, so as to determine whether the touch object 60 has the touch behavior such as a touch area or a touch track by using the difference.
In one embodiment, in the first mode M1, the self-capacitance sensing means transmitting an excitation signal to the sensing electrode on the second electrode layer 30, and then receiving the first sensing amount; in the second mode M2, the self-capacitance sensing means that an excitation signal is transmitted to the sensing electrode on the first electrode layer 20, and then the second sensing amount is received.
Referring to fig. 3A, 4 and 5, the touch object 60 applies a specific force on the protection layer 50. When the first mode M1 is executed (as shown in fig. 4), the control unit 10 receives the first sensing amount generated by the second electrode layer 30, and determines that the touch object 60 triggers a pressure event, such as a pressing gesture, when the first sensing amount is greater than a pressure threshold; when the second mode M2 is executed (as shown in fig. 5), the control unit 10 receives the second sensing amount generated by the first electrode layer 20, and determines the position of the touch object 60 according to the second sensing amount.
Referring to fig. 3A, 6 and 7, the touch object 60 moves on the protection layer 50. When the first mode M1 is executed (as shown in fig. 6), the control unit 10 receives the first sensing amount generated by the second electrode layer 30; when the second mode M2 is executed (as shown in fig. 7), the control unit 10 receives the second sensing amount generated by the first electrode layer 20, and determines the position of the touch object 60 according to the second sensing amount, so as to determine whether a touch event occurs. The touch event refers to a touch behavior or gesture without pressure. In this embodiment, the control unit 10 continuously executes the execution procedure for a plurality of times, and in the execution procedure for n adjacent times, the second sensing amount is used to determine the position change of the touch object 60, when the position of the touch object 60 changes, whether the position distance is greater than a preset length is compared, if the front-back position distance is greater than the preset length, the gesture of the touch object 60 is determined to be sliding, wherein n is a positive integer greater than or equal to 1, that is, the second sensing amount obtained by the execution procedure for 1, 2 times … or n adjacent times is used to determine the position movement condition of the touch object 60, and further determine whether the sliding gesture is formed.
When the touch object 60 contacts the protection layer 50 in a large area but the applied force is not greater than the pressure threshold, the second sensing amount obtained in the second mode M2 generates a larger sensing amount due to a larger contact area, but the first sensing amount obtained in the first mode M1 is not affected by the contact area and only reacts to the force applied by the touch object 60, so that the first sensing amount does not exceed the pressure threshold, thereby avoiding false triggering of the pressing event by the user and reducing false judgment.
In summary, the first sensing amount obtained in the first mode M1 is only affected by pressure by using the first electrode layer 20 as a shielding layer in the first mode M1, so that pressure information can be obtained independently without being affected by the touch object 60 or other environmental noise (such as screen noise or electromagnetic interference), and the second sensing amount with touch information can be obtained by matching the second mode M2 that is executed alternately with the first mode M1, so as to determine the touch behavior such as the contact area or the movement track of the touch object 60, and accurately distinguish whether the user wants to trigger a pressure event or a touch event.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (16)
1. A pressure sensing unit, comprising:
a control unit;
a first electrode layer electrically connected with the control unit;
the second electrode layer is electrically connected with the control unit and is arranged at one side of the first electrode layer;
wherein, the control unit executes a first mode and a second mode:
in the first mode, the first electrode layer is electrically connected with a grounding end or a fixed potential, and self-capacitance induction is carried out on the second electrode layer to obtain a first induction quantity; a kind of electronic device with high-pressure air-conditioning system
In the second mode, the second electrode layer is electrically connected with a grounding end or a fixed potential, and self-capacitance induction is carried out on the first electrode layer to obtain a second induction quantity;
the control unit generates pressure information according to the first sensing quantity and generates touch information according to the second sensing quantity.
2. The pressure sensing unit of claim 1, wherein a pressing event is determined to be true when the first sensing amount is greater than a pressure threshold.
3. The pressure sensing unit of claim 1, wherein the control unit executes the execution program a plurality of times in succession, each execution program comprising x times the first mode and y times the second mode, wherein x and y are each positive integers greater than or equal to 1.
4. The pressure sensing unit of claim 1, wherein a touch object is determined when the difference between the second sensing amount and the first sensing amount is greater than a touch threshold.
5. The pressure sensing unit of claim 4, wherein the control unit executes the execution program a plurality of times, each execution program comprising x times the first mode and y times the second mode, wherein x and y are positive integers greater than or equal to 1, respectively, wherein when the distance between the positions of the touch object of the adjacent n execution programs is greater than a predetermined length, the gesture of the touch object is determined to be a sliding, and n is a positive integer greater than or equal to 1.
6. An electronic device with pressure sensing, comprising:
a housing;
a control unit arranged on the shell;
the first electrode layer is arranged on the shell and is electrically connected with the control unit;
the second electrode layer is arranged on the shell, is electrically connected with the control unit and is arranged on one side of the first electrode layer;
a protective layer covering the first electrode layer;
wherein, the control unit executes a first mode and a second mode:
in the first mode, the first electrode layer is electrically connected with a grounding end or a fixed potential, and self-capacitance induction is carried out on the second electrode layer to obtain a first induction quantity; a kind of electronic device with high-pressure air-conditioning system
In the second mode, the second electrode layer is electrically connected with a grounding end or a fixed potential, and self-capacitance induction is carried out on the first electrode layer to obtain a second induction quantity;
the control unit generates pressure information according to the first sensing quantity and generates touch information according to the second sensing quantity.
7. The electronic device of claim 6, wherein a pressing event is determined to be true when the first sensing amount is greater than a pressure threshold.
8. The electronic device of claim 6, wherein the control unit executes the execution program a plurality of times in succession, each execution program comprising x times the first mode and y times the second mode, wherein x and y are positive integers greater than or equal to 1, respectively.
9. The electronic device of claim 6, wherein a touch object is determined when a difference between the second sensing amount and the first sensing amount is greater than a touch threshold.
10. The electronic device of claim 9, wherein the control unit continuously executes the execution program a plurality of times, each execution program comprising x times the first mode and y times the second mode, wherein x and y are positive integers greater than or equal to 1, respectively, wherein when the distance between the positions of the touch object of the execution program n times is greater than a predetermined length, it is determined that the gesture of the touch object is a sliding, and n is a positive integer greater than or equal to 1.
11. A capacitive sensing control method including pressure sensing for a pressure sensing unit having a first electrode layer and a second electrode layer, the control method comprising the steps of:
executing a first mode, electrically connecting the first electrode layer to a grounding terminal or a fixed potential, and performing self-capacitance induction on the second electrode layer to obtain a first induction quantity; a kind of electronic device with high-pressure air-conditioning system
Executing a second mode, electrically connecting the second electrode layer to a grounding terminal or a fixed potential, and performing self-capacitance induction on the first electrode layer to obtain a second induction quantity;
and generating pressure information according to the first sensing quantity and generating touch information according to the second sensing quantity.
12. The method of claim 11, wherein when the first sensing amount is greater than a pressure threshold, determining that a pressing event is true.
13. The method of claim 11, wherein the control method is performed a plurality of times in succession, each of the plurality of times comprising executing the first pattern x times and executing the second pattern y times, wherein x and y are positive integers greater than or equal to 1, respectively.
14. The method of claim 11, wherein a touch object is determined when a difference between the second sensing amount and the first sensing amount is greater than a touch threshold.
15. The method of claim 14, wherein the control method is performed a plurality of times, each of the plurality of times comprises performing the first mode x times and performing the second mode y times, wherein x and y are positive integers greater than or equal to 1, respectively, and when the distance between the positions of the touch object of the adjacent n times of the plurality of times of the execution program is greater than a predetermined length, determining that the gesture of the touch object is sliding, and n is a positive integer greater than or equal to 1.
16. The method of claim 11, wherein in the first mode, the self-capacitance sensing means transmitting an excitation signal to the second electrode layer and receiving the first sensing amount; in the second mode, the self-capacitance sensing means transmitting an excitation signal to the first electrode layer and then receiving the second sensing amount.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111102289A TWI813137B (en) | 2022-01-19 | 2022-01-19 | Electronic device with pressure sensing, pressure sensing unit thereof, and capacitive sensing control method thereof |
| TW111102289 | 2022-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116501186A true CN116501186A (en) | 2023-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210294489.2A Pending CN116501186A (en) | 2022-01-19 | 2022-03-23 | Electronic device with pressure sensing function, pressure sensing unit thereof and capacitance sensing control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116501186A (en) |
| TW (1) | TWI813137B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140267152A1 (en) * | 2013-03-12 | 2014-09-18 | Mircrochip Technology Incorporated | Force Sensing X-Y Touch Sensor |
| US9141225B2 (en) * | 2013-05-31 | 2015-09-22 | Eastman Kodak Company | Capacitive touch screen with force detection |
| TWI604366B (en) * | 2015-08-11 | 2017-11-01 | 瑞鼎科技股份有限公司 | Capacitive force sensing touch panel |
-
2022
- 2022-01-19 TW TW111102289A patent/TWI813137B/en active
- 2022-03-23 CN CN202210294489.2A patent/CN116501186A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| TWI813137B (en) | 2023-08-21 |
| TW202331480A (en) | 2023-08-01 |
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