CN111813243A - Mouse device and noise elimination method thereof - Google Patents
Mouse device and noise elimination method thereof Download PDFInfo
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- CN111813243A CN111813243A CN201910288337.XA CN201910288337A CN111813243A CN 111813243 A CN111813243 A CN 111813243A CN 201910288337 A CN201910288337 A CN 201910288337A CN 111813243 A CN111813243 A CN 111813243A
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- 238000000034 method Methods 0.000 title claims description 20
- 230000008030 elimination Effects 0.000 title claims description 6
- 238000003379 elimination reaction Methods 0.000 title claims description 6
- 230000001960 triggered effect Effects 0.000 claims abstract description 17
- 230000005236 sound signal Effects 0.000 claims description 62
- 230000009467 reduction Effects 0.000 claims description 32
- 230000006870 function Effects 0.000 claims description 25
- 241000699666 Mus <mouse, genus> Species 0.000 description 51
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03543—Mice or pucks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Abstract
A mouse device comprises a key switch, a microcontroller, a loudspeaker drive circuit and a loudspeaker. The key switch emits a first sound when triggered. The microcontroller is electrically coupled to the key switch, and the key switch is configured to provide a trigger signal to the microcontroller when triggered. The speaker driving circuit is electrically coupled to the microcontroller, and the speaker is electrically coupled to the speaker driving circuit. The speaker driving circuit is configured to drive the speaker to play a second sound that substantially cancels the first sound.
Description
Technical Field
The invention relates to a mouse device and a noise elimination method thereof.
Background
A general computer mouse makes a sound audible to human ears when a button is clicked, and thus, it may cause trouble to others when used in a meeting room, a public place, or a quiet environment. Compared with the conventional mouse, the mute mouse has the advantage that the button noise is reduced by about eighty-nine times.
Most of the mute mice in the market at present reduce the button noise by replacing a common microswitch with the mute microswitch, however, the mouse using the mute microswitch has the defects of short button service life, poor button feedback and the like, and an improved method is proposed by related field personnel.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a novel mouse device that realizes a mute function by an active noise reduction technique.
To achieve the above objective, according to some embodiments of the present invention, a mouse device includes a key switch, a microcontroller, a speaker driving circuit, and a speaker. The key switch emits a first sound when triggered. The microcontroller is electrically coupled to the key switch, and the key switch is configured to provide a trigger signal to the microcontroller when triggered. The speaker driving circuit is electrically coupled to the microcontroller, and the speaker is electrically coupled to the speaker driving circuit. The speaker driving circuit is configured to drive the speaker to play a second sound that substantially cancels the first sound.
In one or more embodiments of the present invention, the microcontroller is configured to provide a notification signal when receiving the trigger signal, and the speaker driving circuit is configured to drive the speaker to play the second sound after receiving the notification signal.
In one or more embodiments of the present invention, the mouse device further includes a memory unit electrically coupled to the microcontroller and configured to store an audio signal corresponding to the second sound.
In one or more embodiments of the present invention, the memory unit is integrated within the microcontroller.
In one or more embodiments of the present invention, the mouse device further includes a sound receiving device, a sound receiving device driving circuit, and a signal processing unit. The sound receiving device driving circuit is electrically coupled to the sound receiving device and configured to drive the sound receiving device to record the first sound as a first audio signal. The signal processing unit is electrically coupled to the sound receiving device driving circuit and configured to calculate a second audio signal corresponding to the second sound based on the first audio signal.
In one or more embodiments of the present invention, the microcontroller is configured to provide a notification signal when receiving the trigger signal, and the sound pickup device driving circuit is configured to drive the sound pickup device to record the first sound after receiving the notification signal.
In one or more embodiments of the present invention, the mouse device further includes an active noise reduction processor, and the signal processing unit, the sound receiving device driving circuit and the speaker driving circuit are integrated in the active noise reduction processor.
In one or more embodiments of the present invention, the mouse device further includes a mute function switch configured to control switching of the speaker driving circuit.
According to some embodiments of the present invention, a method for eliminating noise applied to a mouse device including a key switch and a speaker includes: when the key switch is triggered to emit a first sound, the loudspeaker is driven to play a second sound which substantially cancels the first sound.
In one or more embodiments of the present invention, the mouse device further includes a microcontroller and a memory unit electrically coupled to the microcontroller. The noise cancellation method further comprises: storing the audio signal corresponding to the second sound in a memory unit in advance; and driving the microcontroller to read the audio signal by the memory unit when the key switch is triggered.
In one or more embodiments of the present invention, the mouse device further includes a sound receiving device and an active noise reduction processor electrically coupled to the sound receiving device. The noise cancellation method further comprises: when the key switch is triggered, the active noise reduction processor is used for driving the sound receiving device to record a first sound as a first audio signal; and driving the active noise reduction processor to calculate a second audio signal corresponding to the second sound based on the first audio signal.
In summary, the mouse device of the present invention implements the mute function by the active noise reduction technology. The audio signal (i.e., the second audio signal) for canceling the sound emitted by the key switch can be pre-calculated and stored, or can be generated by real-time sound reception and signal processing.
Drawings
In order to make the aforementioned and other objects, features, advantages and embodiments of the present invention more comprehensible, the following description is given with reference to the accompanying drawings:
FIG. 1 is a schematic block diagram of a mouse device according to an embodiment of the invention.
FIG. 2 is a schematic block diagram of a mouse device according to another embodiment of the invention.
Fig. 3 is a flowchart showing a noise removing method applied to the mouse apparatus shown in fig. 1.
FIG. 4 is a schematic block diagram of a mouse device according to another embodiment of the invention.
Fig. 5 is a flowchart showing a noise removing method applied to the mouse apparatus shown in fig. 4.
[ List of reference numerals ]
100. 200, 400: mouse device
110: push-button switch
120: loudspeaker
130: loudspeaker drive circuit
140. 240: micro-controller
150. 250: memory cell
190. 490: mute function switch
460: radio device
465: radio device driving circuit
470: signal processing unit
480: active noise reduction processor
300. 500: noise elimination method
301 to 305, 501 to 509: step (ii) of
Detailed Description
In order to make the description of the present invention more complete and complete, reference is made to the accompanying drawings and the following description of various embodiments. The elements of the drawings are not to scale and are provided solely for the purpose of illustrating the invention. Numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, it will be apparent to one of ordinary skill in the relevant art that the present invention may be practiced without one or more of the specific details, and therefore, such specific details should not be used to limit the invention.
Referring to fig. 1, a schematic block diagram of a mouse device 100 according to an embodiment of the invention is shown. The mouse device 100 includes a key switch 110, a speaker 120, a speaker driving circuit 130, a microcontroller 140, and a memory unit 150. The key switch 110 is disposed under a key (not shown) of the mouse apparatus 100 and is activated as the key is pressed. The key switch 110 emits a first sound S1 when activated. The microcontroller 140 is electrically coupled to the key switch 110 and configured to detect whether the key switch 110 is triggered (for example, when the key switch 110 is triggered, a trigger signal ACS is provided to the microcontroller 140, the details of which are described in detail below with reference to fig. 3). In some embodiments, the key switch 110 is a micro switch.
As mentioned above, the speaker driving circuit 130 is electrically coupled to the microcontroller 140 and the speaker 120, and is configured to drive the speaker 120 to play the second sound S2 that substantially cancels the first sound S1 in response to the key switch 110 being activated (for example, the microcontroller 140 provides the notification signal NS to the speaker driving circuit 130 when receiving the activation signal ACS from the key switch 110, the details of which are described in detail with reference to fig. 3 below). Specifically, the second sound S2 emitted from the speaker 120 destructively interferes with the first sound S1 emitted from the key switch 110, and as an example of a simple sine wave, the second sound S2 has the same amplitude as the first sound S1 but opposite phase (i.e., one hundred eighty degrees out of phase), so that the first sound S1 is cancelled. It should be noted that the second sound S2 substantially cancels the first sound S1 does not mean that the second sound S2 completely cancels the first sound S1, and in some embodiments, the second sound S2 only needs to reduce the first sound S1 to a degree that the human ear cannot/cannot hear easily.
The speaker 120 is disposed at one side of the key switch 110 and is as close as possible to the key switch 110 to achieve a better noise cancellation effect. While mouse device 100 may have multiple buttons (and corresponding multiple button switches 110), in such embodiments, mouse device 100 may include multiple speakers 120, each disposed adjacent to a corresponding button switch 110, or may employ a single speaker 120 design. In some embodiments, the speaker 120 is a piezoelectric speaker, which is easily installed in the mouse device 100 due to its small size, considering the limited space inside the mouse device 100.
In the present embodiment, the second audio signal AS2 corresponding to the second sound S2 is stored in the memory unit 150. The memory unit 150 is electrically coupled to the microcontroller 140, so that the microcontroller 140 can read the second audio signal AS2 (e.g., when receiving the trigger signal ACS) from the memory unit 150 and transmit the second audio signal AS2 to the speaker driving circuit 130. In some embodiments, the second audio signal AS2 is a digital signal, and the speaker driving circuit 130 has a digital-to-analog function, and can convert the second audio signal AS2 into an analog signal, and play out the corresponding second sound S2 by the speaker 120 based on the analog signal.
In the present embodiment, the second audio signal AS2 is stored in the memory unit 150 in advance when the mouse device 100 is manufactured. For example, the first sound S1 may be recorded AS the first audio signal AS1 in a quiet environment such AS a laboratory, and the second audio signal AS2 may be calculated based on the first audio signal AS1 by using a suitable signal processing algorithm, and then the second audio signal AS2 may be written into the memory unit 150.
The memory unit 150 can be a read only memory. Considering that different models of mouse devices 100 may use different key switches 110, in some embodiments, the memory unit 150 is configured to store a plurality of audio signals for canceling out sounds generated by different key switches 110, so that the memory unit 150 can support different models of mouse devices 100 without having to produce different memory units 150 for each model.
In some embodiments, the mouse apparatus 100 further includes a mute function switch 190 electrically coupled to the speaker driving circuit 130 and configured to control the switching of the speaker driving circuit 130. Specifically, when the mute function switch 190 is switched to the on state, the mute function switch 190 supplies an on signal to the speaker driving circuit 130, thereby turning on the speaker driving circuit 130. Conversely, when the mute function switch 190 is switched to the off state, the mute function switch 190 supplies an off signal to the speaker driving circuit 130, thereby turning off the speaker driving circuit 130. The user can select whether to activate the mute function of the mouse apparatus 100, and switch the mute function switch 190 to a corresponding state.
In other embodiments, the mute function switch 190 is electrically coupled to the microcontroller 140, when the mute function switch 190 is switched to the on state, the mute function switch 190 provides an on signal to the microcontroller 140, and the microcontroller 140 receiving the on signal reads the second audio signal AS2 from the memory unit 150 when receiving the trigger signal ACS and transmits the second audio signal AS2 to the speaker driving circuit 130. Conversely, when the mute function switch 190 is switched to the off state, the mute function switch 190 provides an off signal to the microcontroller 140, and the microcontroller 140 receiving the off signal does not perform reading of the second audio signal AS2 when receiving the trigger signal ACS.
Referring to FIG. 2, a schematic block diagram of a mouse device 200 according to another embodiment of the invention is shown. The mouse device 200 includes the key switch 110, the speaker 120, the speaker driving circuit 130, the microcontroller 240, the memory unit 250 and the mute function switch 190, wherein the same reference numerals denote the same elements substantially as those described above with reference to fig. 1, and for brevity of description, the description of these elements will not be repeated here.
Unlike the design of the memory unit 150 externally connected to the embodiment shown in fig. 1, in the present embodiment, the memory unit 250 of the mouse device 200 is integrated into the microcontroller 240. In other words, the second audio signal AS2 is pre-stored in the memory built in the microcontroller 240, so the microcontroller 240 does not need to connect any external memory device.
Referring to fig. 3, a flowchart of a noise cancellation method 300 applied to the mouse apparatus 100 shown in fig. 1 is shown. It should be noted that the "noise" refers to the first sound S1 emitted by the key switch 110. First, in step 301, when the key switch 110 is triggered (for example, a key corresponding to the key switch 110 is pressed) to generate the first sound S1, the key switch 110 is actuated to provide the trigger signal ACS to the microcontroller 140.
Next, in step 303, when the microcontroller 140 receives the trigger signal ACS, the microcontroller 140 is driven to provide a notification signal NS to the speaker driving circuit 130, wherein the notification signal NS includes the second audio signal AS2 stored in the memory unit 150.
Finally, in step 305, upon receiving the notification signal NS by the speaker driving circuit 130, the speaker 120 is driven to play the second sound S2 substantially canceling the first sound S1 based on the second audio signal AS 2.
In some embodiments, the second audio signal AS2 is a digital signal, and the speaker driver circuit 130 converts the second audio signal AS2 into an analog signal and drives the speaker 120 to play the second sound S2 that substantially cancels the first sound S1 based on the analog signal.
Obviously, the noise cancellation method 300 shown in fig. 3 can also be applied to the mouse device 200, except that the microcontroller 240 of the mouse device 200 reads the second audio signal AS2 from the memory unit 250 therein, and the microcontroller 140 of the mouse device 100 reads the second audio signal AS2 from the memory unit 150 outside thereof.
Referring to FIG. 4, a schematic block diagram of a mouse device 400 according to another embodiment of the invention is shown. The mouse device 400 includes the keyswitch 110, the speaker 120, the speaker driving circuit 130, the microcontroller 140, the sound receiving device 460, the sound receiving device driving circuit 465 and the signal processing unit 470, wherein like reference numerals represent elements substantially identical to those described above with reference to fig. 1, and for brevity of description, a description of these elements is not repeated herein. Unlike the embodiment shown in fig. 1, in which the second audio signal AS2 is pre-calculated and stored, the mouse device 400 of this embodiment generates the second audio signal AS2 in real time.
The sound receiving device 460 is disposed at one side of the key switch 110, and the sound receiving device driving circuit 465 is electrically coupled to the sound receiving device 460 and configured to drive the sound receiving device 460 to record the first sound S1 AS the first audio signal AS 1. The sound-receiving device 460 faces the key switches 110 and is as close as possible to the key switches 110 for obtaining the best sound-receiving effect. In some embodiments, the sound receiving device 460 is a micro-electromechanical (MEMS) microphone, which is easy to install in the mouse device 400 due to its small size, considering the limited internal space of the mouse device 400. The signal processing unit 470 is electrically coupled to the sound receiving device driving circuit 465 and configured to calculate a second audio signal AS2 based on the first audio signal AS1 recorded by the sound receiving device 460.
In the present embodiment, the signal processing unit 470, the sound pickup device driving circuit 465 and the speaker driving circuit 130 are integrated in an Active Noise cancellation Processor 480 (ANC Processor), that is, the Active Noise cancellation Processor 480 has the capability of signal processing and driving the sound pickup device 460 and the speaker 120. The active noise reduction processor 480 is electrically coupled to the microcontroller 140 and the sound receiving device 460, and configured to drive the sound receiving device 460 to record the first sound S1 AS the first audio signal AS1 in response to the key switch 110 being triggered (i.e., when receiving the notification signal NS from the microcontroller 140), then calculate the second audio signal AS2 based on the first audio signal AS1, and finally drive the speaker 120 to play the second sound S2 to cancel the first sound S1.
The signal processing unit 470 may be an analog signal processing unit or a digital signal processing unit, and if the signal processing unit 470 is a digital signal processing unit, the active noise reduction processor 480 needs to convert the first audio signal AS1 recorded by the sound receiving device 460 into a digital signal, and then the digital signal is processed by the signal processing unit 470. After the signal processing unit 470 calculates the digital second audio signal AS2, the active noise reduction processor 480 converts the second audio signal AS2 into an analog signal, and drives the speaker 120 to play the second sound S2 based on the analog signal.
In embodiments where the mouse device 400 includes a plurality of sound receiving devices 460 (e.g., a microphone array) for recording the first sound S1 emitted from the key switch 110 at different angles and positions, a more complex signal processing algorithm is required to calculate the second audio signal AS2 from a plurality of different first audio signals AS1 recorded by the plurality of sound receiving devices 460, compared to the design of a single sound receiving device 460. The signal processing algorithm is not the focus of the present invention, and therefore, not described herein, it is well known in the relevant art to select an appropriate signal processing algorithm to construct the second audio signal AS2 according to practical requirements.
In these embodiments, the mouse device 400 may include a plurality of sound receiving devices 460, each of which is disposed adjacent to a corresponding key switch 110 to record the sound emitted from the corresponding key switch 110, or a single sound receiving device 460 may record the sound emitted from all the key switches 110.
In some embodiments, the mouse apparatus 400 further includes a mute function switch 490 electrically coupled to the active noise reduction processor 480 and configured to control the switching of the active noise reduction processor 480. Specifically, when the mute function switch 490 is switched to the on state, the mute function switch 490 provides an on signal to the active noise reduction processor 480, so that the active noise reduction processor 480 is turned on. Conversely, when the mute function switch 490 is switched to the off state, the mute function switch 490 supplies an off signal to the active noise reduction processor 480, thereby turning off the active noise reduction processor 480.
Referring to fig. 5, a flowchart of a noise cancellation method 500 applied to the mouse apparatus 400 shown in fig. 4 is shown. First, in step 501, when the key switch 110 is triggered (for example, a key corresponding to the key switch 110 is pressed) to generate the first sound S1, the key switch 110 is actuated to provide the trigger signal ACS to the microcontroller 140.
Next, in step 503, when the microcontroller 140 receives the trigger signal ACS, the microcontroller 140 is driven to provide the notification signal NS to the active noise reduction processor 480.
Then, in step 505, when the active noise reduction processor 480 receives the notification signal NS, the sound pickup device 460 is driven (e.g., the sound pickup device is driven by the sound pickup device driving circuit 465 in the active noise reduction processor 480) to record the first sound S1 AS the first audio signal AS 1. In some embodiments, the sound receiving device 460 is turned on only after the active noise reduction processor 480 receives the notification signal NS, and is turned off for the rest of the time to save power.
Next, in step 507, after the sound pickup device 460 finishes recording the first sound S1, the active noise reduction processor 480 is driven to calculate a second audio signal AS2 corresponding to the second sound S2 based on the first audio signal AS1 (for example, by using the signal processing unit 470 in the active noise reduction processor 480).
Finally, in step 509, after the active noise reduction processor 480 computes the second audio signal AS2, the speaker 120 is driven by the active noise reduction processor 480 (e.g., the speaker 120 is driven by the speaker driver circuit 130 within the active noise reduction processor 480) to play a second sound S2 that substantially cancels the first sound S1 based on the second audio signal AS 2.
In summary, the mouse device of the present invention utilizes the active noise reduction technology to implement the mute function. The audio signal (i.e., the second audio signal) for canceling the sound emitted by the key switch can be pre-calculated and stored, or can be generated by real-time sound reception and signal processing.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A mouse apparatus, comprising:
the key switch is used for making a first sound when triggered;
a microcontroller electrically coupled to the key switch, wherein the key switch is configured to provide a trigger signal to the microcontroller when triggered;
the loudspeaker driving circuit is electrically coupled with the microcontroller; and
a speaker electrically coupled to the speaker driver circuit, the speaker driver circuit configured to drive the speaker to play a second sound, wherein the second sound substantially cancels the first sound.
2. The mouse apparatus of claim 1, wherein the microcontroller is configured to provide a notification signal upon receiving the trigger signal, and wherein the speaker driver circuit is configured to drive the speaker to play the second sound upon receiving the notification signal.
3. The mouse apparatus of claim 1, further comprising a memory unit electrically coupled to the microcontroller and configured to store an audio signal corresponding to the second sound.
4. The mouse apparatus of claim 3, wherein the memory unit is integrated within the microcontroller.
5. The mouse apparatus of claim 1, further comprising:
a sound receiving device;
a sound receiving device driving circuit electrically coupled to the sound receiving device and configured to drive the sound receiving device to record the first sound as a first audio signal; and
the signal processing unit is electrically coupled to the sound receiving device driving circuit and configured to calculate a second audio signal corresponding to the second sound based on the first audio signal.
6. The mouse device as claimed in claim 5, wherein the microcontroller is configured to provide a notification signal upon receiving the trigger signal, and the sound receiving device driving circuit is configured to drive the sound receiving device to record the first sound upon receiving the notification signal.
7. The mouse device of claim 5, further comprising an active noise reduction processor, wherein the signal processing unit, the sound receiving device driving circuit, and the speaker driving circuit are integrated within the active noise reduction processor.
8. The mouse apparatus of claim 1, further comprising a mute function switch configured to control switching of the speaker driver circuit.
9. A noise elimination method is applied to a mouse device, and is characterized in that the mouse device comprises a key switch and a loudspeaker, and the noise elimination method comprises the following steps:
when the key switch is triggered to emit a first sound, the loudspeaker is driven to play a second sound, and the second sound substantially cancels the first sound.
10. The noise cancellation method of claim 9, wherein the mouse device further comprises a microcontroller and a memory unit electrically coupled to the microcontroller, the noise cancellation method further comprising:
storing the audio signal corresponding to the second sound in the memory unit in advance; and
and when the key switch is triggered, driving the microcontroller to read the audio signal by the memory unit.
11. The noise cancellation method of claim 9, wherein the mouse device further comprises a sound reception device and an active noise reduction processor electrically coupled to the sound reception device, the noise cancellation method further comprising:
when the key switch is triggered, the active noise reduction processor is used for driving the sound receiving device to record the first sound as a first audio signal; and
and driving the active noise reduction processor to calculate a second audio signal corresponding to the second sound based on the first audio signal.
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|---|---|---|---|
| CN201910288337.XA CN111813243A (en) | 2019-04-11 | 2019-04-11 | Mouse device and noise elimination method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910288337.XA CN111813243A (en) | 2019-04-11 | 2019-04-11 | Mouse device and noise elimination method thereof |
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| CN111813243A true CN111813243A (en) | 2020-10-23 |
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