CN116700529A - Electronic equipment and touch operation detection method - Google Patents

Electronic equipment and touch operation detection method Download PDF

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Publication number
CN116700529A
CN116700529A CN202310560947.7A CN202310560947A CN116700529A CN 116700529 A CN116700529 A CN 116700529A CN 202310560947 A CN202310560947 A CN 202310560947A CN 116700529 A CN116700529 A CN 116700529A
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CN
China
Prior art keywords
display screen
ultrasonic
ultrasonic transducer
reflected
touch operation
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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.)
Pending
Application number
CN202310560947.7A
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Chinese (zh)
Inventor
王晓雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Filing date
Publication date
Application filed by Vivo Mobile Communication Co Ltd filed Critical Vivo Mobile Communication Co Ltd
Priority to CN202310560947.7A priority Critical patent/CN116700529A/en
Publication of CN116700529A publication Critical patent/CN116700529A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/043Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G06F3/0433Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/0418Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04186Touch location disambiguation
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Abstract

The application discloses electronic equipment and a touch operation detection method, and belongs to the technical field of communication. An electronic device includes: a housing; the display screen comprises a display panel, and is arranged in the shell; the capacitive touch sensor is arranged on one side of the display screen and used for detecting the capacitance; the ultrasonic transducer is arranged on one side of the display screen and used for transmitting ultrasonic waves and receiving reflected waves of the ultrasonic waves reflected by the ultrasonic waves, and the ultrasonic waves and the reflected waves propagate in the display screen and on the surface along the direction parallel to the display panel; and the processor is connected with the capacitive touch sensor and the ultrasonic transducer and is used for determining whether touch operation exists on the display screen according to the capacitance detected by the capacitive touch sensor and the reflected wave received by the ultrasonic transducer.

Description

Electronic equipment and touch operation detection method
Technical Field
The application belongs to the technical field of communication, and particularly relates to electronic equipment and a touch operation detection method.
Background
The capacitive touch display screen realizes the function of touch detection by utilizing the capacitance change between touch screen electrodes caused by the contact of fingers of a person, and the capacitive touch display screen has finer detection signals and higher sensitivity and is widely applied. However, the display screen has poor waterproof touch detection function because the display screen has poor waterproof performance and the touch is misjudged if water drops or other liquids exist on the display screen, and the problems of insensitivity and unresponsiveness of touch can also occur when the fingers are provided with water.
Disclosure of Invention
The embodiment of the application aims to provide electronic equipment and a touch operation detection method, which can solve the problem of poor waterproof touch detection effect of a capacitive touch display screen.
In a first aspect, an embodiment of the present application provides an electronic device, including: a housing; the display screen comprises a display panel, and is arranged in the shell; the capacitive touch sensor is arranged on one side of the display screen and used for detecting the capacitance; the ultrasonic transducer is arranged on one side of the display screen and used for transmitting ultrasonic waves and receiving reflected waves of the ultrasonic waves reflected by the ultrasonic waves, and the ultrasonic waves and the reflected waves propagate in the display screen and on the surface along the direction parallel to the display panel; and the processor is connected with the capacitive touch sensor and the ultrasonic transducer and is used for determining whether touch operation exists on the display screen according to the capacitance detected by the capacitive touch sensor and the reflected wave received by the ultrasonic transducer.
In a second aspect, an embodiment of the present application provides a touch operation detection method, which is applied to the electronic device in the first aspect, and the method includes: under the condition that the capacitance change of the display screen is detected, obtaining reflected waves received by the ultrasonic transducer; and under the condition that the characteristics of the plurality of reflected waves received within the preset time are different, determining that the touch operation exists on the display screen.
In the embodiment of the application, the electronic equipment comprises the capacitive touch sensor for detecting the capacitance and the ultrasonic transducer for transmitting ultrasonic waves and receiving reflected waves, so that whether the touch operation exists on the display screen or not can be determined according to the capacitance detected by the capacitive touch sensor and the reflected waves received by the ultrasonic transducer, the influence on the touch position positioning when other liquids such as water exist on the screen or hands is avoided, accurate and sensitive touch is realized, the problem that liquid such as water drops erroneously touches the display screen or the display screen is caused to lose efficacy in touch insensitivity is avoided, and the accuracy of touch operation detection is improved.
Drawings
FIG. 1 is a block diagram of an electronic device according to an embodiment of the present application;
FIG. 2 is a flow chart of a touch operation detection method according to an embodiment of the application;
FIG. 3 is a first application scenario schematic of an electronic device according to an embodiment of the present application;
fig. 4 is a schematic diagram of a second application scenario of an electronic device according to an embodiment of the present application;
fig. 5 is a schematic view of a third application scenario of an electronic device according to an embodiment of the present application;
FIG. 6 is a schematic layout of an ultrasonic transducer according to an embodiment of the present application;
FIG. 7 is a schematic diagram of an embodiment of the present application for activating an ultrasonic transducer;
fig. 8 is a block diagram of an electronic device according to another embodiment of the present application;
fig. 9 is a schematic hardware structure of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present application, fall within the scope of protection of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The electronic device and the touch operation detection method provided by the embodiment of the application are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.
Fig. 1 is a block diagram of an electronic device according to an embodiment of the present application. As shown in fig. 1, an electronic device of an embodiment of the present application includes a housing; a display screen 20 including a display panel 22, the display screen 20 being disposed in the housing; the capacitive touch sensor is arranged on one side of the display screen 20 and is used for detecting the capacitance; an ultrasonic transducer 30 provided at one side of the display screen 20 for transmitting ultrasonic waves 42 and receiving reflected waves 44 reflected by the ultrasonic waves 42, the ultrasonic waves 42 and the reflected waves 44 propagating inside and on the surface of the display screen in a direction parallel to the display panel 22; and the processor is connected with the capacitive touch sensor and the ultrasonic transducer 30 and is used for determining whether the display screen 20 has touch operation according to the capacitance detected by the capacitive touch sensor and the reflected wave 44 received by the ultrasonic transducer 30.
Referring to fig. 1, fig. 1 is a side view of the electronic device in a direction perpendicular to the display panel 22, and the housing includes a housing portion 12 and a housing portion 14 on both sides of the display 20, and a housing portion 16 on a rear of the electronic device opposite the display panel 1.
In the embodiment of the present application, the capacitive touch sensor includes a self-capacitive touch sensor and a mutual-capacitive touch sensor, and may be disposed on a side of the display screen 20 other than the light-emitting surface, for example, under the screen. The capacitive touch sensor comprises a transverse electrode and a longitudinal electrode array, wherein the transverse electrode and the longitudinal electrode respectively form self-capacitance with the ground, and the intersection of the transverse electrode and the longitudinal electrode forms mutual capacitance. When a finger approaches or touches the display screen 20, the capacitance value of the corresponding capacitance of the capacitive touch sensor is changed, and the processor can determine the position where the capacitance change occurs by scanning the capacitance change at each intersection.
However, the capacitance change may be caused by the normal finger touch of the user, or by a drop of water or other liquid contacting the display screen 20. For normal finger touch of a user, namely touch operation, response is needed. For water drops, if detected as a touch operation and responded, erroneous judgment may be caused. Therefore, after determining that the capacitance change and the corresponding position occur, the position cannot be directly considered to have a touch operation.
In the embodiment of the present application, the ultrasonic transducer 30 is introduced at a suitable position on one side of the display screen 20 for transmitting the ultrasonic wave 42 and receiving the reflected wave 44 reflected by the ultrasonic wave 42, so that the ultrasonic wave 42 and the reflected wave 44 can propagate in a direction parallel to the display panel 22 inside the display screen 20 and on a surface of the display screen 20 in contact with the external environment (i.e., a light-emitting surface of the display panel 22). The display screen 20 is of a rigid material and ultrasonic waves may propagate through the interior of the display screen 20 and along the surface of the display screen 20.
The electronic equipment comprises a capacitive touch sensor for detecting the capacitance and an ultrasonic transducer for transmitting ultrasonic waves and receiving reflected waves, so that a processor of the electronic equipment can determine whether touch operation exists on a display screen according to the capacitance detected by the capacitive touch sensor and the reflected waves received by the ultrasonic transducer, influence on touch position positioning when the screen or other liquid such as water exists on hands is avoided, accurate and sensitive touch is realized, the problem that liquid such as water drops erroneously touches the display screen or the display screen is caused to lose efficacy in touch insensitivity is avoided, and the accuracy of touch operation detection is improved.
The ultrasonic waves emitted by the ultrasonic transducer 30 are mechanical waves that can propagate in gases, liquids and solids, in other words, in any medium having elastic properties. The wave pattern of the ultrasonic wave to be propagated varies depending on the sound source, medium, boundary conditions, etc., and there are longitudinal waves, transverse waves, surface waves, etc. The ultrasonic waves 42 emitted by the ultrasonic transducer 30 are transverse waves that propagate in a direction parallel to the display panel 22 and are reflected at the interface between two different media. Thus, the ultrasonic wave 42, upon encountering other media, such as the opposite edge of the housing portion 12, during forward travel, will reflect, forming a reflected wave 44, which continues to reflect back in a direction parallel to the display panel 22.
To form the above-mentioned ultrasonic waves and reflected waves thereof, the ultrasonic transducer is optionally disposed on a side of the display screen 20 away from the light-emitting surface of the display panel 22 or on an edge side of the display screen 20 perpendicular to the light-emitting surface of the display panel 22.
The side of the display 20 away from the light-emitting surface of the display panel 22 may be any position under the screen, and in order to fully detect all possible touch operations on the display, the ultrasonic transducer 30 is preferably located on any edge area under the screen of the display 20. Thus, the propagation distance D corresponding to the ultrasonic wave 42 emitted by the ultrasonic transducer 30 and the reflected wave 44 transmitted back can be overlapped with the display screen 20 to a greater extent, so as to be used for detecting more touch positions.
In one embodiment, the edge side of the display 20 perpendicular to the light-emitting surface of the display panel 22 is the side periphery of the display 20, such as any position on four sides of the edge. In this way, the propagation distance of the ultrasonic wave 42 emitted from the ultrasonic transducer 30 and the reflected wave 44 transmitted back can be overlapped with the display screen 20 to a greater extent.
In general, the ultrasonic transducer 30 is provided only on one side, and when there are a plurality of ultrasonic transducers 30, a plurality of ultrasonic transducers 30 are provided on the same side.
Optionally, the number of the ultrasonic transducers is plural, and the ultrasonic transducers are uniformly distributed on the side of the display screen 20.
By providing a plurality of ultrasonic transducers uniformly distributed on the lower edge area or edge side of the display screen 20 on the same side, the ultrasonic waves 42 and the reflected waves 44 emitted by each ultrasonic transducer 30 can cover the display screen 20 to the maximum extent for more accurate touch position detection, which will be described later.
Referring to fig. 1, the ultrasonic transducer 30 is positioned on a side of the display 20 adjacent to the housing portion 14 under the screen, and ultrasonic waves 42 emitted from the ultrasonic transducer 30 propagate in the interior and surface of the display 20 in a direction parallel to the display panel 22, and after the ultrasonic waves 42 propagate into contact with the opposite housing portion 12, the interface between the display 20 and the housing portion 12 is reflected to form reflected waves 44, and propagate in the interior and surface of the display 20 in a direction opposite to the ultrasonic waves 42.
In one embodiment, the reflected wave 44 that is reflected back is received by an ultrasonic transducer. The ultrasonic transducer that receives the reflected wave 44 may be the same as the ultrasonic transducer that emits the ultrasonic wave 42. If the ultrasonic transducer is the same, the ultrasonic wave transmission and reception needs to be staggered in time, and after the ultrasonic transducer transmits the ultrasonic wave 42, the ultrasonic transducer is switched to a reception function for receiving the reflected wave 44 reflected by the ultrasonic wave 42.
In one embodiment, the ultrasonic transducer for transmitting the ultrasonic wave 42 and the ultrasonic transducer for receiving the transmitted wave 44 may also be separately provided. Alternatively, the ultrasonic transducer includes a transducer for transmitting ultrasonic waves and a transducer for receiving reflected waves, the transmitting transducer and the receiving transducer being in close proximity.
By locating the transmitting ultrasound transducer in close proximity to the receiving ultrasound transducer, it is ensured that the ultrasound transducer for receiving is able to receive the reflected wave 44 reflected back by the ultrasound waves 42 transmitted by the adjacent ultrasound transducer.
Specifically, the ultrasonic transducer includes a piezoelectric ceramic ultrasonic transducer, an electromagnetic acoustic transducer, or a magnetostrictive transducer. By providing an ultrasonic transducer of the type described above with a high frequency electrical signal, it is converted into ultrasonic waves, and the reflected waves are received by the ultrasonic transducer and converted into electrical signals for transmission to a processor (not shown) for detection of touch operations.
The processor is respectively connected with the capacitive touch sensor and the ultrasonic transducer 30, and is used for collecting capacitance values detected by the capacitive touch sensor, and the ultrasonic transducer 30 is used for determining whether touch operation exists on the display screen 20 based on electric signals converted by the received reflected waves 42.
Next, a touch operation detection method according to an embodiment of the present application will be described with reference to the embodiments of fig. 2 to 7. The touch operation detection method of the embodiment of the present application is applied to the electronic device according to any one of the embodiments, as shown in fig. 2, and the method includes:
102, under the condition that the capacitance change of a display screen is detected, acquiring reflected waves received by an ultrasonic transducer;
step 104, determining that the touch operation exists on the display screen under the condition that the characteristics of the plurality of reflected waves received in the preset time are different.
As described above, the capacitance change of the display screen may be the normal finger touch of the user, or may be the liquid such as water drops touching the display screen 20.
Therefore, in step 102, the reason for the capacitance change needs to be further identified by combining the ultrasonic transducer, so as to avoid erroneous touch operation judgment caused by water drops.
When the display screen 20 is not in touch operation, the ultrasonic wave 42 emitted from the ultrasonic transducer 30 is reflected back through the housing portion 12 of the opposite end edge, and the signal intensity of the reflected wave 44 and the time from the ultrasonic transducer 30 to the ultrasonic wave 42 being emitted to the ultrasonic wave 42 being received can be known in advance by actual testing.
Specifically, the characteristics of the reflected wave include the signal intensity of the reflected wave and the reception time of the reflected wave.
As shown in fig. 3, when the finger 50 touches the display panel 22, the ultrasonic wave 42 emitted by the ultrasonic transducer 30 contacts the finger 50 on the surface of the display panel 22, and is reflected at the interface between the display panel 22 and the finger, thereby forming a corresponding reflected wave 46. The reflected wave 46 may be received by the ultrasonic transducer 30. At this point, the ultrasonic transducer 30 receives two reflected waves, one finger reflected wave 46 from the finger 50 and one reflected wave 44 from the inner edge of the housing portion 12.
Although both are reflected waves generated correspondingly to the ultrasonic wave 42, the signal strengths corresponding to the reflected wave 44 and the reflected wave 46 are different from the time received by the ultrasonic transducer 30, respectively. After the target reflected wave is received, the signal intensity and the receiving time correspond to the characteristics of the reflected wave 44 known in advance, and it can be judged that the target reflected wave is a normal edge reflected wave 44. If there is a reflected wave received before the reflected wave 44 and the signal intensity is different from the intensity of the reflected wave 44, it can be judged that a touch operation is generated.
That is, if the ultrasonic transducer 30 receives the reflected wave 44 reflected by the edge of the housing portion 12 at a preset time after emitting the target ultrasonic wave 42 according to experiments in advance, it indicates that the touch operation of the display screen 20 exists if it is detected that the ultrasonic transducer 30 receives a plurality of reflected waves at a preset time and that the signal intensities and the receiving times of the plurality of reflected waves are different.
If one reflected wave is received at a preset time or a plurality of reflected waves are received and the signal strength and the receiving time are the same, it indicates that the display screen 20 has no touch operation.
As shown in fig. 4, if a drop 60 of water is dropped onto the display panel 22, the ultrasonic wave 42 will not reflect when encountering a low viscosity liquid such as the drop 60, but will continue to propagate along the direction parallel to the display panel 22, in which case the ultrasonic transducer 30 only receives a reflected wave, that is, the reflected wave 44 reflected by the opposite edge housing portion 12, so that no touch operation exists on the detection display screen 20, and a response to a touch event caused by a false touch such as a drop of water is avoided.
Optionally, under the condition that the change of capacitance of the display screen is detected, acquiring the reflected wave received by the ultrasonic transducer includes: under the condition that the capacitance change of the display screen is detected, an ultrasonic transducer is started to emit ultrasonic waves; and in the preset time, the ultrasonic transducer receives reflected waves reflected by the ultrasonic waves.
In this embodiment, in the normal standby state, when no touch operation is generated, only the capacitive touch function of the display screen 20 is turned on, and the ultrasonic transducer 30 is turned off. Only when the processor detects a capacitance change through the capacitance detected by the capacitive touch sensor, the ultrasonic transducer 30 is turned on again, so that the ultrasonic transducer 30 emits ultrasonic waves 42.
In this way, the capacitive detection of the capacitive touch sensor can be only maintained when the display screen 20 is not in touch operation, no additional power consumption is increased, the ultrasonic transducer 30 is additionally started only when the capacitive change is detected, and whether the capacitive change is caused by touch operation or false touch caused by other liquid is detected by combining ultrasonic waves transmitted and received by the ultrasonic transducer 30. Compared with the method that the capacitive touch sensor and the ultrasonic transducer are simultaneously started to perform touch operation detection, the embodiment can remarkably save power consumption of the electronic equipment.
After detecting the touch operation, a corresponding process is generally performed in response to the touch operation. However, sometimes detecting a touch operation may involve an actual touch event generated by a user's finger, and there may also be some other solid object that causes the detected touch event.
Therefore, in order to accurately detect the touch operation of the human hand and respond, after determining that the touch operation exists on the display screen, the method further comprises: determining a first location where a capacitance change exists on the display screen 20; determining a second position of the display screen 20 where the touch operation exists; and responding to the touch operation under the condition that the first position is the same as the second position.
From the capacitance detected by the capacitive touch sensor, it may be determined that there is a change in capacitance of the display screen 20, and a location on the display screen 20 where the change in capacitance occurs may be determined.
The second position of the display 20 where the touch operation is present is located by the ultrasound transducer 30 where there are different reflected waves according to the received characteristics.
Specifically, the received reflected waves include a first reflected wave 44 generated by the ultrasonic wave 42 emitted from the ultrasonic transducer 30 being reflected by the first medium, and a second reflected wave generated by the ultrasonic wave 42 emitted from the ultrasonic transducer 30 being reflected by the second medium performing the touch operation, and determining the second position where the touch operation exists on the display screen 20 includes: determining a first time period from when the ultrasonic transducer 30 transmits the ultrasonic wave 42 to when the first reflected wave is received, and a second time period from when the second reflected wave is received; determining a first distance D1 of the emission position of the ultrasonic transducer 30 to the first medium; determining a second distance D2 from the transmitting position of the ultrasonic transducer to the second medium based on the first duration, the second duration and the first distance; a second location is determined based on the second distance D2.
Referring to fig. 3, the first reflected wave is generated by the ultrasonic wave 42 emitted by the ultrasonic transducer 30 being reflected by the housing portion 12, and the second reflected wave is generated by the ultrasonic wave 42 emitted by the ultrasonic transducer 30 being reflected by the finger 50.
For the reflected wave 44 of the housing portion 12, the time difference or duration from the emission of the ultrasonic wave 42 until the reflected wave 44 is received is T1, the distance from the emission position of the ultrasonic wave 42 to the reflection interface of the housing portion 12 is D1, and the duration T1 and the distance D1 are data known in advance through experiments.
For reflected wave 46 of finger 50, the time difference or duration from the emission of ultrasonic wave 42 to the receipt of reflected wave 46 is T2, and the distance from the emission location of ultrasonic wave 42 to the reflection interface at the location touched by finger 50 is T2 x D1/T1. So that a specific position of the finger 50 in the ultrasonic wave propagation direction, i.e., a position where the touch operation of the finger 50 is present on the display screen 20, can be located.
And responding to the touch operation under the condition that the position of the display screen with capacitance change is the same as the position of the display screen with the touch operation.
For reporting the final touch operation, the capacitive touch sensor is required to detect that the capacitance changes, meanwhile, the ultrasonic transducer 30 detects that the touch operation exists, and the position of the capacitance change is the same as the position of the touch operation detected by the ultrasonic transducer 30, so that the touch operation and the specific position of the touch operation can be reported for responding the touch operation.
When a plurality of fingers 50 touch the display panel 22, for example, referring to fig. 5, when there is a touch of the finger 50 and the finger 50', a reflected wave 46 is generated at the touch position corresponding to the finger 50, a reflected wave 46' is generated at the touch position corresponding to the finger 50', the signal intensities of the two reflected waves are different from the received time, that is, the characteristics of the received reflected waves are different, and the processor can determine that there are two received times. Based on the time at which the respective reflected wave is received, the specific location of the corresponding touch of the two fingers can be determined.
The number of the ultrasonic transducers 30 can be specifically adjusted according to the size of the display screen 20 and the accuracy requirement of touch detection. As shown in fig. 6, a plurality of ultrasonic transducers 30 are distributed at an edge of a certain side under the display screen 20, and according to the above, the ultrasonic transducers 30 determine that the touch operation corresponds to the position in the propagation direction of the ultrasonic wave, then according to the layout position of the ultrasonic transducers 30 that receive the reflected wave 44 of the finger 50, the position of the touch operation in the layout direction of the ultrasonic transducers 30 can be determined, so that the specific position of the touch operation in the display screen 10 can be accurately determined.
Optionally, one side of the display screen is provided with a plurality of ultrasonic transducers, and before the ultrasonic transducers are started to emit ultrasonic waves, the display screen further comprises: determining a first position where capacitance change exists on one side of a display screen; determining an ultrasonic transducer in a region corresponding to the first position; the ultrasonic transducer in the region is activated.
As shown in fig. 7, when the finger 50 touches the display 20 at a position 72 corresponding to the solid line frame, the capacitive touch sensor detects the change in capacitance and the position 72 of the change in capacitance on the display 20. The region 74 corresponding to the location 72 where the ultrasound transducer is disposed may be determined and one or more ultrasound transducers 30 disposed within the region 74 may be turned on. An ultrasonic transducer disposed within region 74 emits ultrasonic waves 42 that propagate through location 72, i.e., are reflected from finger 50.
Since the position 72 where the capacitance changes is already known, only the ultrasonic transducer of the corresponding area 74 is turned on at this time, so that it is possible to detect whether the finger 50 touches or the liquid such as the water drop 60 is on the display screen 10, and power consumption of the electronic device can be further saved.
In the above embodiment, for the case where a plurality of ultrasonic transducers 30 are laid out, in order to save power consumption of the electronic device, only one or several ultrasonic transducers of the region corresponding to the capacitance change position may be activated, and the other ultrasonic transducers may be kept in the off state. If the touch operation has only one touch point, only one ultrasonic transducer has corresponding reflected wave, and by starting the ultrasonic transducer in the corresponding area of the capacitance change position, the power consumption can be reduced, and the accurate positioning of the touch operation position can be realized.
In addition, in order to accurately detect the position of the touch operation, the density of the lateral electrode and the longitudinal electrode of the capacitive touch of the display screen 20 is large, which corresponds to the large distribution density of the capacitance on the display screen 20. In the embodiment of the application, the ultrasonic transducer is added to perform touch operation positioning, so that the densities of the transverse electrode and the longitudinal electrode of the capacitive touch of the display screen 20 can be reduced, only the capacitive touch sensor is required to sense a approximate capacitance change position, and then the ultrasonic transducer in a corresponding area is opened to position a specific touch operation position, or whether actual touch operation is generated is detected. The capacitance density is reduced, so that on one hand, the cost of the display screen 20 can be saved, and on the other hand, the power consumption of the capacitive touch sensor to the electronic equipment can be saved.
In the embodiment of the application, the electronic equipment comprises the capacitive touch sensor for detecting the capacitance and the ultrasonic transducer for transmitting ultrasonic waves and receiving reflected waves, so that whether the touch operation exists on the display screen or not can be determined according to the capacitance detected by the capacitive touch sensor and the reflected waves received by the ultrasonic transducer, the influence on the touch position positioning when other liquids such as water exist on the screen or hands is avoided, accurate and sensitive touch is realized, the problem that liquid such as water drops erroneously touches the display screen or the display screen is caused to lose efficacy in touch insensitivity is avoided, and the accuracy of touch operation detection is improved.
According to the touch operation detection method provided by the embodiment of the application, the execution main body can be a touch operation detection device. In the embodiment of the application, a method for executing touch operation detection by the touch operation detection device is taken as an example, and the touch operation detection device provided by the embodiment of the application is described.
The touch operation detection device includes: the acquisition module acquires reflected waves received by the ultrasonic transducer under the condition that the capacitance change of the display screen is detected; the determining module is used for determining that touch operation exists on the display screen under the condition that the characteristics of the plurality of reflected waves received in the preset time are different.
The touch operation detection device in the embodiment of the application can be an electronic device, and can also be a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. The electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a mobile internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), or may be a personal computer (personal computer, PC), or the like, which is not limited in particular.
The touch operation detection device in the embodiment of the application can be a device with an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, and the embodiment of the present application is not limited specifically.
The touch operation detection device provided by the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2 to fig. 7, and in order to avoid repetition, a detailed description is omitted here.
Optionally, as shown in fig. 8, the embodiment of the present application further provides an electronic device 900, which includes a processor 940 and a memory 920, where the memory 920 stores a program or an instruction that can be executed on the processor 940, and the program or the instruction implements each step of the above-mentioned touch operation detection method embodiment when executed by the processor 940, and the steps can achieve the same technical effects, so that repetition is avoided, and no further description is given here.
The electronic device in the embodiment of the application includes the mobile electronic device and the non-mobile electronic device.
Fig. 9 is a schematic hardware structure of an electronic device implementing an embodiment of the present application.
The electronic device 1000 includes, but is not limited to: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.
Those skilled in the art will appreciate that the electronic device 1000 may also include a power source (e.g., a battery) for powering the various components, which may be logically connected to the processor 1010 by a power management system to perform functions such as managing charge, discharge, and power consumption by the power management system. The electronic device structure shown in fig. 9 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than shown, or may combine certain components, or may be arranged in different components, which are not described in detail herein.
The processor 1010 is configured to obtain a reflected wave received by the ultrasonic transducer when detecting that the display screen has a capacitance change; and under the condition that the characteristics of the plurality of reflected waves received within the preset time are different, determining that the touch operation exists on the display screen.
Optionally, the processor 1010 is further configured to, in the case where a change in capacitance of the display screen is detected, activate the ultrasonic transducer to emit ultrasonic waves; and in the preset time, the ultrasonic transducer receives reflected waves reflected by the ultrasonic waves correspondingly.
Optionally, the processor 1010 is further configured to determine, after determining that the display screen has a touch operation, a first position where the display screen has a capacitance change; determining a second position of the display screen with touch operation; and responding to the touch operation under the condition that the first position is the same as the second position.
Optionally, the received reflected waves include a first reflected wave and a second reflected wave, the first reflected wave is generated by the ultrasonic wave emitted by the ultrasonic transducer being reflected by the first medium, the second reflected wave is generated by the ultrasonic wave emitted by the ultrasonic transducer being reflected by the second medium performing the touch operation, and the processor 1010 determines that the second position of the touch operation exists on the display screen, including: determining a first time period from when the ultrasonic transducer transmits the ultrasonic wave to when the ultrasonic wave receives the first reflected wave and a second time period from when the ultrasonic transducer receives the second reflected wave; determining a first distance from a transmitting position of the ultrasonic transducer to a first medium; determining a second distance from the transmitting position of the ultrasonic transducer to the second medium based on the first duration, the second duration and the first distance; a second location is determined based on the second distance.
Optionally, a plurality of ultrasonic transducers are disposed on one side of the display screen, and the processor 1010 is further configured to determine a first position where there is a capacitance change on one side of the display screen before the ultrasonic transducers are activated to emit ultrasonic waves; determining an ultrasonic transducer in a region corresponding to the first position; the ultrasonic transducer in the region is activated.
In the embodiment of the application, under the condition that the capacitance change of the display screen is detected, the reflected wave received by the ultrasonic transducer is obtained; under the condition that the characteristics of a plurality of reflected waves received in the preset time are different, the fact that the display screen has touch operation is determined, the influence on touch position positioning when the screen or other liquid such as water exists on the hands can be avoided, accurate and sensitive touch is realized, the problem that the liquid such as water drops mistakenly touches the display screen or the display screen is caused to be insensitive to failure in touch is avoided, and the accuracy of touch operation detection is improved.
It should be appreciated that in an embodiment of the present application, the input unit 1004 may include a graphics processor (Graphics Processing Unit, GPU) 10041 and a microphone 10042, and the graphics processor 10041 processes image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1007 includes at least one of a touch panel 10071 and other input devices 10072. The touch panel 10071 is also referred to as a touch screen. The touch panel 10071 can include two portions, a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.
The memory 1009 may be used to store software programs as well as various data. The memory 1009 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 1009 may include volatile memory or nonvolatile memory, or the memory 1009 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 1009 in embodiments of the application includes, but is not limited to, these and any other suitable types of memory.
The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1010.
The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above touch operation detection method embodiment, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
The embodiment of the application further provides a chip, which comprises a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is used for running programs or instructions to realize the processes of the embodiment of the touch operation detection method, and the same technical effects can be achieved, so that repetition is avoided, and the description is omitted here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.
An embodiment of the present application provides a computer program product, which is stored in a storage medium, and the program product is executed by at least one processor to implement the processes of the above-mentioned embodiments of the touch operation detection method, and achieve the same technical effects, so that repetition is avoided, and a detailed description is omitted herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims (10)

1. An electronic device, comprising:
a housing;
the display screen comprises a display panel, and the display screen is arranged in the shell;
the capacitive touch sensor is arranged on one side of the display screen and used for detecting the capacitance;
the ultrasonic transducer is arranged on one side of the display screen and used for transmitting ultrasonic waves and receiving reflected waves reflected by the ultrasonic waves, and the ultrasonic waves and the reflected waves propagate in the display screen and on the surface along a direction parallel to the display panel;
and the processor is connected with the capacitive touch sensor and the ultrasonic transducer and is used for determining whether touch operation exists on the display screen according to the capacitance detected by the capacitive touch sensor and the reflected wave received by the ultrasonic transducer.
2. The electronic device of claim 1, wherein the ultrasonic transducer is disposed on a side of the display screen away from the light-emitting surface of the display panel or on an edge side of the display screen perpendicular to the light-emitting surface of the display panel.
3. The electronic device of claim 1, wherein the number of ultrasonic transducers is a plurality and is uniformly distributed on the side of the display screen.
4. The electronic device of claim 1, wherein the ultrasonic transducer comprises a transducer for transmitting the ultrasonic wave and a transducer for receiving the reflected wave, the transmitting transducer and the receiving transducer being in close proximity.
5. A touch operation detection method, applied to the electronic device as claimed in any one of claims 1 to 4, the method comprising:
under the condition that the capacitance change of the display screen is detected, obtaining reflected waves received by the ultrasonic transducer;
and under the condition that the characteristics of the plurality of reflected waves received within the preset time are different, determining that the touch operation exists on the display screen.
6. The method according to claim 5, wherein the acquiring the reflected wave received by the ultrasonic transducer in the case where the change in capacitance of the display screen is detected includes:
under the condition that the capacitance change of the display screen is detected, the ultrasonic transducer is started to emit the ultrasonic waves;
and in a preset time, the ultrasonic transducer receives reflected waves reflected by the ultrasonic waves.
7. The method of claim 5, wherein the characteristics of the reflected wave include a signal strength of the reflected wave and a time of receipt of the reflected wave.
8. The method of claim 5, wherein after the determining that the touch operation is performed on the display screen, further comprises:
determining a first position where the display screen has capacitance change;
determining a second position of the display screen where touch operation exists;
and responding to the touch operation under the condition that the first position is the same as the second position.
9. The method of claim 8, wherein the received reflected waves include a first reflected wave generated by reflection of ultrasonic waves emitted by the ultrasonic transducer through the first medium and a second reflected wave generated by reflection of the ultrasonic waves emitted by the ultrasonic transducer through a second medium performing the touch operation,
the determining that the second position of the touch operation exists on the display screen includes:
determining a first duration from when the ultrasonic transducer transmits the ultrasonic wave to when the ultrasonic wave is received and a second duration from when the ultrasonic transducer receives the first reflected wave;
determining a first distance from a transmitting position of the ultrasonic transducer to the first medium;
determining a second distance from the emission location of the ultrasonic transducer to the second medium based on the first duration, the second duration, and the first distance;
the second location is determined based on the second distance.
10. The method according to any one of claims 5 to 9, wherein a side of the display screen is provided with a plurality of the ultrasonic transducers, and before the ultrasonic transducers are activated to emit the ultrasonic waves, further comprising:
determining a first position where capacitance change exists on one side of the display screen;
determining an ultrasonic transducer in the area corresponding to the first position;
the ultrasonic transducers in the region are activated.
CN202310560947.7A 2023-05-17 2023-05-17 Electronic equipment and touch operation detection method Pending CN116700529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310560947.7A CN116700529A (en) 2023-05-17 2023-05-17 Electronic equipment and touch operation detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310560947.7A CN116700529A (en) 2023-05-17 2023-05-17 Electronic equipment and touch operation detection method

Publications (1)

Publication Number Publication Date
CN116700529A true CN116700529A (en) 2023-09-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310560947.7A Pending CN116700529A (en) 2023-05-17 2023-05-17 Electronic equipment and touch operation detection method

Country Status (1)

Country Link
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