CN112099677A - Electrical appliance and capacitance induction type input detection device thereof - Google Patents
Electrical appliance and capacitance induction type input detection device thereof Download PDFInfo
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- CN112099677A CN112099677A CN201910528205.XA CN201910528205A CN112099677A CN 112099677 A CN112099677 A CN 112099677A CN 201910528205 A CN201910528205 A CN 201910528205A CN 112099677 A CN112099677 A CN 112099677A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- 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
- G06F3/017—Gesture based interaction, e.g. based on a set of recognized hand gestures
Abstract
The present invention relates to a capacitance induction type input detection device, including: touch-control response electrode array, electric capacity detection circuitry and treater, touch-control response electrode array includes a plurality of touch-control response electrodes, electric capacity detection circuitry connects a plurality of touch-control response electrodes for detect the distributed electric capacity on every touch-control response electrode, the treater configuration is: and calculating the distributed capacitance increment of each touch sensing electrode, comparing the distributed capacitance increment with a corresponding threshold value, and calculating the touch position according to the distributed capacitance increments of the adjacent touch sensing electrodes.
Description
Technical Field
The present invention relates to electrical appliances, and particularly to a capacitive sensing input detection device.
Background
With the demand of electrical appliance intellectualization, more and more electrical appliance products such as household appliances need to be provided with human-computer interaction devices such as gesture detection and the like. Most of existing detection gesture detection devices adopt an infrared detection mode, and fig. 1 is a schematic diagram of an existing infrared gesture detection device. As shown in fig. 1, the infrared gesture detection apparatus 100 includes two sets of infrared transceivers, the infrared transmitter 110 and the infrared receiver 111 are combined into one set of infrared transceiver, the infrared transmitter 112 and the infrared receiver 113 are combined into another set, and multiple sets of infrared transceivers may be disposed in the infrared gesture detection apparatus according to the needs of practical application. When the infrared gesture detection device 100 is operated, the infrared transmitters 110 and 112 continuously transmit infrared waves, and when a human hand or other objects move to a position right before the infrared transmitters of the group and are less than a certain range away from the infrared transmitters, the infrared waves are reflected by the human hand and received by the infrared receivers of the group, so that the position of the human hand can be detected. The waving direction of the hand of a person can be judged through analyzing the signals received by the plurality of groups of infrared transceivers, so that the gesture of the person can be distinguished.
Each pair of infrared transmitting and receiving devices of the existing gesture detection device based on the infrared transmitting and receiving devices can only detect whether a short-distance object exists in the vertical direction of the device, and the position of a human hand between the two pairs of sensors cannot be judged, so that multiple pairs of sensors need to be installed in order to improve the position accuracy of gesture detection in practical application, and the cost of components of the whole device is high. In addition, the infrared sensor can only detect whether an object is blocked at a close distance, and whether the object is a human body or other objects cannot be judged, so that false triggering caused by blocking of other objects often occurs in practical application.
Some existing gesture detection devices adopt a capacitive sensing mode, and are mostly applied to sensing keys and touch pads. The induction key uses a one-dimensional coordinate, the touch pad uses a two-dimensional coordinate, both the induction key and the touch pad need to actually touch the interface of the device, and the induction key cannot sense the approach of a touch object through capacitance, namely cannot be applied to gesture detection and judgment of a person, so that the application aspect and the field range of the induction key are very small.
Disclosure of Invention
The invention provides an electrical appliance and a capacitance induction type input detection device thereof, which are used for realizing sensitive detection of a conductive touch object such as a human hand.
In order to solve the above technical problem, the present invention provides a capacitive sensing type input detection device, including: touch-control response electrode array, electric capacity detection circuitry and treater, touch-control response electrode array includes a plurality of touch-control response electrodes, electric capacity detection circuitry connects a plurality of touch-control response electrodes for detect the distributed electric capacity on every touch-control response electrode, the treater configuration is: and calculating the distributed capacitance increment of each touch sensing electrode, comparing the distributed capacitance increment with a corresponding threshold value, and calculating the touch position according to the distributed capacitance increments of the adjacent touch sensing electrodes.
In an embodiment of the invention, the touch sensing electrodes are symmetrically arranged in a first direction and a second direction, and the first direction and the second direction are perpendicular.
In an embodiment of the invention, the touch sensing electrodes surround one or more areas.
In an embodiment of the present invention, the touch sensing electrodes include: the touch control device comprises first touch control induction electrodes and second touch control induction electrodes which are arranged at intervals in a first direction, and third touch control induction electrodes and fourth touch control induction electrodes which are arranged at intervals in a second direction, wherein the first touch control induction electrodes, the second touch control induction electrodes and the fourth touch control induction electrodes surround a touch control area, and the first touch control induction electrodes, the second touch control induction electrodes and the fourth touch control induction electrodes are arranged at the edge of the touch control area.
In an embodiment of the invention, each touch sensing electrode is in a shape of a strip, and an aspect ratio of the touch sensing electrode is greater than 10: 1.
In an embodiment of the invention, the processor is configured to determine that a touch object approaches when the average distributed capacitance increment of the touch sensing electrodes is greater than the corresponding threshold, and start to calculate the touch position according to the distributed capacitance increment of the adjacent touch sensing electrodes.
In an embodiment of the invention, a distance between the touch object characterized by the threshold and the touch sensing electrode array reaches 10 cm.
In an embodiment of the invention, the processor is configured to calculate the touch position as follows: calculating touch positions in the first direction according to first distributed capacitance increments and second distributed capacitance increments on the first touch sensing electrode and the second touch sensing electrode; and calculating the touch position in the second direction according to the third distributed capacitance increment and the fourth distributed capacitance increment on the third touch sensing electrode and the fourth touch sensing electrode.
In an embodiment of the invention, the processor is further configured to determine the touch object trajectory according to the touch positions at a plurality of time instants.
The invention also provides an electrical appliance comprising the capacitance induction type input detection device in any embodiment.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following remarkable advantages: the detection position precision is high, the detection device is low in cost, and the device can be widely applied to human-computer interfaces of household appliances or other appliances.
Drawings
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:
fig. 1 is a schematic diagram of a conventional infrared gesture detection apparatus.
Fig. 2 is a schematic diagram of a capacitive sensing type input detection device for an electrical appliance according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating the calculation of the touch position of a touch object in the apparatus of fig. 2.
Fig. 4 is a schematic diagram of a capacitive sensing type input detection device of an electrical appliance according to another embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.
As used in this application and the appended claims, the terms "a," "an," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
It will be understood that when an element is referred to as being "on," "connected to," "coupled to" or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to" or "directly contacting" another element, there are no intervening elements present. Similarly, when a first component is said to be "in electrical contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and/or other components that allow current to flow even without direct contact between the conductive components.
Example one
Fig. 2 is a schematic diagram of a capacitive sensing type input detection device for an electrical appliance according to an embodiment of the present invention. As shown in fig. 2, the electrical appliance 20 includes a capacitive sensing type input detection device 200, and the capacitive sensing type input detection device 200 includes a touch sensing electrode array 210, a capacitive detection circuit 220 and a processor 230. The touch sensing electrode array 210 includes four touch sensing electrodes: the first touch sensing electrode 211, the second touch sensing electrode 212, the third touch sensing electrode 213 and the fourth touch sensing electrode 214 are electrically isolated from each other, and the first to fourth touch sensing electrodes 211 and 214 are electrically isolated from each other. The first to fourth touch sensing electrodes 211 and 214 surround a region, which is a rectangular region. In some other embodiments, the shape of the region may be rectangular, or may be other shapes such as triangular, polygonal, and the like. The first to fourth touch sensing electrodes 211 and 214 are symmetrically arranged in a first direction (X direction in the figure) and a second direction (Y direction in the figure), and the first direction is perpendicular to the second direction. In the present embodiment, the first touch sensing electrodes 211 and the second touch sensing electrodes 212 are arranged at intervals in the first direction, and the third touch sensing electrodes 213 and the fourth touch sensing electrodes 214 are arranged at intervals in the second direction. In some other embodiments, the first and second directions are not limited to the directions shown in fig. 2. The first to fourth touch sensing electrodes 211 and 214 surround the touch area 210a, and the first to fourth touch sensing electrodes 211 and 214 are located at the edge of the touch area 210 a. It is understood that the dotted frame shown in fig. 2 is only an example, because the boundary of the touch sensing area 210a is not clearly defined due to the characteristics of the touch sensing electrode. The first to fourth touch sensing electrodes 211 and 214 are in the shape of a strip, and compared with other shapes with the same area, the strip touch sensing electrodes can detect a touch object in a larger range, so that the enclosed touch area is larger. In view of expanding the range of the touch area, the aspect ratio of the touch sensing electrodes 211 and 214 is preferably 10:1 or more.
The processor is configured to calculate the distributed capacitance increments of the first to fourth touch sensing electrodes 211 and 214, compare the distributed capacitance increments with corresponding thresholds, and calculate a touch position according to the distributed capacitance increments of the adjacent touch sensing electrodes. When the average distributed capacitance increment of the first to fourth touch sensing electrodes 211 and 214 is larger than the threshold corresponding to the touch sensing electrode, the processor determines that a touch object approaches and starts to determine the touch position of the touch object. The threshold value represents the distance between the touch object and the touch sensing electrode array 210, and the distance reaches 10 cm. That is, when the distance between the touch object and the touch sensing electrode array 210 is less than or equal to 10cm, the processor determines that the touch object is close to the touch sensing electrode array. Therefore, the input detection device 200 of the present embodiment allows a noncontact operation at a relatively long distance. The capacitance detection circuit is connected to the first to fourth touch sensing electrodes 211 and 214, and is used for detecting the distributed capacitance on each touch sensing electrode. In some embodiments, the processor and the capacitance detection circuit are integrated in a touch microcontroller, which is disposed inside the electrical consumer 20. Some commercially available touch microcontrollers, such as SC95F861X series chips of sequo microelectronics, can be used as the touch microcontroller in this embodiment.
The following describes the judgment principle of the processor according to the embodiment:
when a touch object approaches the touch sensing electrode, the capacitance detection circuit detects that the distributed capacitance on the touch sensing electrode is increased, the processor calculates the distributed capacitance increment of the touch sensing electrode, and the calculation formula of the distributed capacitance is as follows:
CS/d (1)
in equation (1), C is a distributed capacitance having a capacitance value on the order of 10-2pf. The dielectric constant of air, S is the sensing area between the touch sensing electrode and the touch object, and d is the distance between the touch sensing electrode and the touch object. In the present embodiment, the processor calculates the distributed capacitances C of the first to fourth touch sensing electrodes 211 and 214 respectively1、C2、C3、C4When the average distributed capacitance increment of the first to fourth touch sensing electrodes 211 and 214 is detected to be larger than the corresponding threshold value, the processor determines that the touch object approaches. The touch object can be a human hand or other conductive objects which can change the distributed capacitance on the touch sensing electrode. The sensitivity of the capacitance induction type input detection device can be adjusted by adjusting the size of the threshold corresponding to the touch induction electrode, and the farthest distance of the approach of a touch object can be detected.
The processor may calculate the touch position according to a ratio or a difference of the distributed capacitance increments of the adjacent touch sensing electrodes.
In one example, the processor is configured to calculate the touch position in the following manner: increment Δ C according to the first distributed capacitance on the first touch sensing electrode 211 and the second touch sensing electrode 2121And a second distributed capacitance increment Δ C2Ratio of (A) to (B)1/△C2Calculating a touch position of the touch object in a first direction; and increment Δ C according to the third distributed capacitance on the third touch sensing electrode 213 and the fourth touch sensing electrode 2143And a fourth distributed capacitance increment Δ C4Ratio of (A) to (B)3/△C4And calculating the touch position of the touch object in the second direction. The processor is further configured to determine a trajectory of the touching object from the touch positions at the plurality of time instants.
The center of the first to fourth touch sensing electrodes 211 and 214 in the touch sensing electrode array 210 is the origin O, the touch position of the touching object in the first direction (X direction in the figure) is X, the touch position of the touching object in the second direction (Y direction in the figure) is Y, and the touch position of the touching object can be represented as the following calculation formula of coordinates (X, Y) X and Y:
in equations (2) and (3), a and B are gain adjustment factors in the first direction and the second direction, respectively, for adjusting the sensitivity of the capacitive sensing type input detecting device 200 to the detection of the touch object when the touch object moves.
In another example, fig. 3 is a schematic diagram of calculating a touch position of a touch object in the apparatus of fig. 2. As shown in fig. 3, the center of the first to fourth touch sensing electrodes 211 and 214 in the touch sensing electrode array 210 is the origin O, the touch position of the touching object in the first direction (X direction in the figure) is X, the touch position of the touching object in the second direction (Y direction in the figure) is Y, and the touch position of the touching object can be represented as the following calculation formula of coordinates (X, Y) X and Y:
X＝CΔC2-ΔC1) (4)
Y＝D(ΔC4-ΔC3) (5)
in equations (4) and (5), C and D are gain adjustment factors in the first direction and the second direction, respectively, for adjusting the sensitivity of the capacitive sensing type input detecting device 200 to the detection of the touch object when the touch object moves. The processor obtains different coordinates of the touch position of the touch object at different moments through calculation, and determines the track of the touch object through curves obtained by connecting different coordinates, for example, the track of a human hand when the touch object is the human hand.
Example two
Fig. 4 is a schematic diagram of a capacitive sensing type input detection device of an electrical appliance according to another embodiment of the present invention. As shown in fig. 4, the electrical appliance 30 includes a capacitive sensing type input detection device 300, and the capacitive sensing type input detection device 300 includes a touch sensing electrode array 310, a capacitive detection circuit 320 and a processor 330. The processor and the capacitance detection circuit are integrated in a touch microcontroller, and the touch microcontroller is arranged inside the electrical appliance 30. The operation and composition of the processor and the capacitance detection circuit may be similar to those of the first embodiment, and are not described in detail herein. The touch sensing electrode array 310 includes six touch sensing electrodes: a first touch sensing electrode 311, a second touch sensing electrode 312, a third touch sensing electrode 313, a fourth touch sensing electrode 314, a fifth touch sensing electrode 315, and a sixth touch sensing electrode 316. The fifth touch sensing electrode 315 includes a first portion 315a, a second portion 315b separated from each other, and a thin wire 317 electrically connecting the first portion 315a and the second portion 315 b. The sixth touch sensing electrode 316 includes a first portion 316a and a second portion 316b separated from each other and a thin wire 318 electrically connecting the first portion 316a and the second portion 316 b. The thin conductive lines 317 and 318 of the fifth touch sensing electrode 315 and the sixth touch sensing electrode 316 cross each other and are electrically isolated. Here, the thin conductive lines are used at the crossing portions of the fifth touch sensing electrode 315 and the sixth touch sensing electrode 316, so that the coupling capacitance between the two electrodes can be reduced. The third touch sensing electrode 313, the fourth touch sensing electrode 314 and the sixth touch sensing electrode 316 are arranged at intervals in the second direction (Y direction in the figure), and the first touch sensing electrode 311, the second touch sensing electrode 312 and the fifth touch sensing electrode 315 are arranged at intervals in the first direction (X direction in the figure). The first to sixth touch sensing electrodes 311 and 316 are electrically isolated. The first to sixth touch sensing electrodes 311-: wherein the first touch sensing electrode 311, the fourth touch sensing electrode 314, the first portion 315a of the fifth touch sensing electrode 315 and the first portion 316a of the sixth touch sensing electrode 316 are at the edge of the first touch area 310a, the second touch sensing electrode 312, the fourth touch sensing electrode 314, the first portion 315a of the fifth touch sensing electrode 315, and the second portion 316b of the sixth touch sensing electrode 316 are at the edge of the second touch area 310b, the first touch sensing electrode 311, the third touch sensing electrode 313, the second portion 315b of the fifth touch sensing electrode 315, and the first portion 316a of the sixth touch sensing electrode 316 are at the edge of the third touch area 310c, the second touch sensing electrode 312, the third touch sensing electrode 313, the second portion 315b of the fifth touch sensing electrode 315, and the second portion 316b of the sixth touch sensing electrode 316 are at the edge of the fourth touch area 310 d.
In this embodiment, on the basis of the first embodiment, two touch sensing electrodes are added: the number of the fifth touch sensing electrode 315 and the sixth touch sensing electrode 316 is increased to four, so that the touch position of the touch object can be detected more sensitively, and the calculated touch position is more accurate. For other details of the present embodiment, reference may be made to the first embodiment, for example, the determination manner of the touch positions in the first to fourth touch areas 310a to 310d is similar to the determination manner of the touch position in the touch area 210a in the first embodiment. Therefore, the present embodiment will not be expanded in detail similar to the embodiment.
In addition, the embodiments of the present invention are not limited to the structures described in the foregoing embodiments, and other variations are possible. For example, the number of touch sensing electrodes and the number of touch areas may be larger.
The above embodiments of the present invention provide an electrical appliance, which includes the capacitance sensing type input detection device in the above embodiments. The capacitance sensing type input detection device in the above embodiment of the present invention detects whether a touch object is close to an electrical appliance by detecting and calculating a change in distributed capacitance on a touch sensing electrode and calculates a trajectory along which the touch object moves before the electrical appliance. The touch sensing electrode array has the advantages of long detection distance, high detection sensitivity and high detection precision while reducing the array density and complexity of the touch sensing electrodes and reducing the material and process cost of a detection device, and can be widely applied to the field of human-computer interaction of electric appliances, particularly household electric appliances.
The order of processing elements and sequences, the use of alphanumeric characters, or other designations in the present application is not intended to limit the order of the processes and methods in the present application, unless otherwise specified in the claims. While various presently contemplated embodiments of the invention have been discussed in the foregoing disclosure by way of example, it is to be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments herein.
This application uses specific words to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
Although the present invention has been described with reference to the present specific embodiments, it will be appreciated by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes and substitutions may be made without departing from the spirit of the invention, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit and scope of the present invention be covered by the appended claims.
Claims (10)
1. A capacitance sensing type input detection device comprising:
the touch sensing electrode array comprises a plurality of touch sensing electrodes;
the capacitance detection circuit is connected with the touch sensing electrodes and is used for detecting distributed capacitance on each touch sensing electrode;
a processor configured to:
calculating the distributed capacitance increment of each touch sensing electrode, and comparing the distributed capacitance increment with a corresponding threshold value; and
and calculating the touch position according to the distributed capacitance increment of the adjacent touch induction electrodes.
2. The capacitive sensing type input detection device as claimed in claim 1, wherein the plurality of touch sensing electrodes are symmetrically arranged in a first direction and a second direction, and the first direction and the second direction are perpendicular.
3. The capacitive sensing type input detection device as claimed in claim 1 or 2, wherein the plurality of touch sensing electrodes surround one or more areas.
4. The capacitive sensing type input detection device as claimed in claim 2, wherein the plurality of touch sensing electrodes comprises:
the touch control device comprises a first touch control induction electrode and a second touch control induction electrode which are arranged at intervals in a first direction;
the third touch induction electrodes and the fourth touch induction electrodes are arranged at intervals in the second direction;
the first touch sensing electrodes, the second touch sensing electrodes, the third touch sensing electrodes and the fourth touch sensing electrodes surround a touch area, and the first touch sensing electrodes, the second touch sensing electrodes and the fourth touch sensing electrodes are arranged at the edge of the touch area.
5. The capacitive sensing type input detection device according to claim 1 or 4, wherein each touch sensing electrode is in a shape of a bar and has an aspect ratio of 10:1 or more.
6. The capacitive sensing input detection device of claim 4, wherein the processor is configured to determine that a touch object is approaching when the average distributed capacitance increment of the touch sensing electrodes is greater than the corresponding threshold value, and to begin calculating a touch position according to the distributed capacitance increments of adjacent touch sensing electrodes.
7. The capacitive sensing input detection device of claim 6, wherein the threshold value is indicative of a touch object being at a distance of up to 10cm from the array of touch sensing electrodes.
8. The capacitive sensing type input detection device of claim 4, wherein the processor is configured to calculate the touch position as follows:
calculating touch positions in the first direction according to first distributed capacitance increments and second distributed capacitance increments on the first touch sensing electrode and the second touch sensing electrode; and
and calculating the touch position in the second direction according to the third distributed capacitance increment and the fourth distributed capacitance increment on the third touch induction electrode and the fourth touch induction electrode.
9. The capacitive sensing type input detecting device of claim 1, wherein the processor is further configured to determine a touch object trajectory from touch positions at a plurality of times.
10. An electrical consumer, comprising:
the capacitance-sensing type input detection device as claimed in any one of claims 1 to 9.
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| CN114397977A (en) * | 2022-02-26 | 2022-04-26 | 谢晔华 | Capacitance induction type input detection device |
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Address after: B610, Zhongdi building, industry university research base, China University of Geosciences, No.8, Yuexing Third Road, South District, high tech Zone, Nanshan District, Shenzhen, Guangdong 518000 Applicant after: Shenzhen Saiyuan Microelectronics Co.,Ltd. Address before: B610, Zhongdi building, industry university research base, China University of Geosciences, No.8, Yuexing Third Road, South District, high tech Zone, Nanshan District, Shenzhen, Guangdong 518000 Applicant before: SHENZHEN SINONE CHIP ELECTRONIC Co.,Ltd. |