CN106951128B - Method for adjusting driving signal, computer-readable storage medium and mobile terminal - Google Patents
Method for adjusting driving signal, computer-readable storage medium and mobile terminal Download PDFInfo
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- CN106951128B CN106951128B CN201710322956.7A CN201710322956A CN106951128B CN 106951128 B CN106951128 B CN 106951128B CN 201710322956 A CN201710322956 A CN 201710322956A CN 106951128 B CN106951128 B CN 106951128B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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Abstract
The embodiment of the invention discloses a method for adjusting a driving signal, a computer readable storage medium and a mobile terminal. The adjusting method of the driving signal comprises the following steps: when detecting that harmonic frequency corresponding to a charge pump switch generates interference on a terminal communication frequency band, acquiring a first driving signal corresponding to the charge pump switch; generating at least two component signals with different amplitudes according to the first driving signal; superposing the at least two component signals with different amplitudes to obtain a second driving signal, wherein the frequency spectrum energy of the second driving signal is less than that of the first driving signal; the charge pump switch is driven according to the second drive signal. The embodiment of the invention can effectively reduce the interference of harmonic waves generated by the charge pump switch on the terminal communication frequency band.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for adjusting a driving signal, a computer-readable storage medium, and a mobile terminal.
Background
The touch screen system of the terminal comprises a charge pump module. The anti-interference capability of the touch screen system can be improved through the charge pump module. The charge pump module is internally provided with a switch module which is switched continuously at a certain working frequency. During the switching process, the switching module generates harmonic components of its operating frequency. If the harmonic component is close to the current communication frequency band of the terminal, interference may be caused to the communication frequency band of the terminal.
Disclosure of Invention
Embodiments of the present invention provide a method for adjusting a driving signal, a computer-readable storage medium, and a mobile terminal, which can effectively reduce interference of a harmonic generated by a charge pump switch on a terminal communication frequency band.
The embodiment of the invention provides a method for adjusting a driving signal, which comprises the following steps:
when detecting that harmonic frequency corresponding to a charge pump switch generates interference on a terminal communication frequency band, acquiring a first driving signal corresponding to the charge pump switch;
generating at least two component signals with different amplitudes according to the first driving signal;
superposing the at least two component signals with different amplitudes to obtain a second driving signal, wherein the frequency spectrum energy of the second driving signal is smaller than that of the first driving signal;
and driving the charge pump switch according to the second driving signal.
A computer-readable storage medium stores a computer program, and the computer program realizes the steps in the adjustment method of the driving signal provided by the embodiment of the invention when being executed by a processor.
A mobile terminal comprises a memory, a processor and a computer program which is stored in the memory and can run in the processor, wherein the processor executes the computer program to realize the steps of the adjusting method of the driving signal provided by the embodiment of the invention.
A mobile terminal comprises a charge pump, a radio frequency circuit and a processor, wherein the processor is electrically connected with the charge pump and the radio frequency circuit;
the processor is used for acquiring a first driving signal corresponding to the charge pump switch when detecting that the harmonic frequency corresponding to the charge pump switch generates interference on the communication frequency band corresponding to the radio frequency circuit;
the processor is used for generating at least two component signals with unequal amplitudes according to the first driving signal;
the processor is used for superposing the at least two component signals with different amplitudes to obtain a second driving signal, and the frequency spectrum energy of the second driving signal is smaller than that of the first driving signal;
the charge pump is used for driving the charge pump switch according to the second driving signal.
According to the adjusting method of the driving signal, the computer-readable storage medium and the mobile terminal provided by the embodiment of the invention, when the harmonic frequency generated by the charge pump switch is detected to cause interference on the currently used communication frequency band of the terminal, the terminal can acquire the first driving signal corresponding to the charge pump switch. Then, the terminal may generate at least two component signals with different amplitudes according to the first driving signal, and superimpose the at least two component signals with different amplitudes to obtain a second driving signal. The second drive signal satisfies the condition that the spectral energy is less than the first drive signal. The terminal may then drive the charge pump switch in accordance with the second drive signal. Because the frequency spectrum energy of the second driving signal is less than that of the first driving signal, the interference of the harmonic frequency generated by the charge pump switch on the terminal communication frequency band can be reduced when the charge pump switch is driven according to the second driving signal.
Drawings
The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a method for adjusting a driving signal according to an embodiment of the present invention.
Fig. 2 is a time domain waveform diagram of a first driving signal according to an embodiment of the present invention.
Fig. 3 is a time domain waveform diagram of the first component signal, the second component signal and the second driving signal according to an embodiment of the present invention.
Fig. 4 is a time domain waveform diagram of a third component signal, a fourth component signal, a fifth component signal, and a third driving signal according to an embodiment of the present invention.
Fig. 5 is a time domain waveform diagram of a sixth component signal, a seventh component signal, an eighth component signal, and a fourth driving signal according to an embodiment of the present invention.
Fig. 6 is another flow chart of a method for adjusting a driving signal according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an adjusting apparatus of a driving signal according to an embodiment of the present invention.
Fig. 8 is another schematic structural diagram of an apparatus for adjusting a driving signal according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements, the principles of the present invention are illustrated as being implemented in a suitable computing environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
As will be described in detail below.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for adjusting a driving signal according to an embodiment of the present invention, where the flow chart may include:
in step S101, when it is detected that a harmonic frequency corresponding to a charge pump switch interferes with a terminal communication frequency band, a first driving signal corresponding to the charge pump switch is obtained.
It can be understood that the execution subject of the embodiment of the present invention may be a terminal device such as a smart phone or a tablet computer.
For example, a charge pump module of the terminal touch screen system has a switch module therein, and the switch module is switched on and off continuously at a certain operating frequency. During the switching process, the switching module generates harmonic components of its operating frequency. When the harmonic component is close to the current communication frequency band of the terminal, the harmonic component may cause interference to the communication frequency band of the terminal.
In step S101 of this embodiment, for example, when it is detected that a harmonic frequency corresponding to a charge pump switch of a terminal touch screen interferes with a current communication frequency band of the terminal, the terminal may first acquire a driving signal currently corresponding to the charge pump switch, that is, a first driving signal.
In step S102, at least two component signals with different amplitudes are generated according to the first driving signal.
In step S103, the at least two component signals with different amplitudes are superimposed to obtain a second driving signal, where the spectral energy of the second driving signal is smaller than that of the first driving signal.
For example, steps S102 and S103 may include:
after acquiring the first driving signal corresponding to the charge pump switch, the terminal may generate at least two component signals with different amplitudes according to the first driving signal. The terminal may then superimpose the at least two component signals of unequal amplitude to obtain the second drive signal. The second drive signal satisfies the condition that the spectral energy is less than the first drive signal.
In an embodiment, in step S101, the terminal may obtain a pulse width, an amplitude, and a period of the first driving signal, and a switch on-time threshold corresponding to the charge pump switch. It should be noted that the switch on-time threshold corresponding to the charge pump switch is the shortest on-time corresponding to the charge pump switch. The switch on duration threshold may be obtained from a control module of the charge pump switch. Various parameters of the charge pump switch are stored in a control module of the charge pump switch.
The terminal may then generate at least two component signals of unequal amplitude. The at least two component signals of unequal amplitude may satisfy the following condition: the sum of the pulse widths of the at least two component signals is equal to the pulse width of the first drive signal; the period of each component signal is equal to the period of the first drive signal; the amplitude of one and only one of the at least two component signals is greater than or equal to the amplitude of the first drive signal, while the amplitudes of the other component signals are less than the amplitude of the first drive signal; and the pulse width of the component signal with the amplitude larger than or equal to the amplitude of the first driving signal is larger than or equal to the switch-on duration threshold corresponding to the charge pump switch.
In the following, the terminal generates two component signals with different amplitudes, for example, the two component signals are the first component signal and the second component signal, respectively. Referring to fig. 2 and 3, fig. 2 is a time domain waveform of a first driving signal, fig. 3 is a time domain waveform of a first component signal and a second component signal, and a time domain waveform of a second driving signal obtained by superimposing the first component signal and the second component signal.
For example, the terminal generates a first component signal and a second component signal with different amplitudes according to the pulse width, the period and the amplitude of the acquired first driving signal. The sum of the pulse widths of the first component signal and the second component signal is equal to the pulse width of the first drive signal; the periods of the first component signal and the second component signal are both equal to the period of the first drive signal; wherein the amplitude of the first component signal is smaller than the amplitude of the first driving signal, the amplitude of the second component signal is equal to the amplitude of the first driving signal, and the pulse width of the second component signal is larger than the switch on time length threshold of the charge pump switch.
As shown in fig. 2, the first driving signal has a pulse width a, an amplitude b, and a period T. Then, as shown in fig. 3, the sum of the pulse width a1 of the first component signal and the pulse width a2 of the second component signal generated by the terminal is equal to the pulse width of the first drive signal, i.e., a1+ a2= a. The periods of the first and second component signals are both equal to the period T of the first drive signal. The amplitude b1 of the first component signal is smaller than the amplitude b of the first drive signal, while the amplitude b2 of the second component signal is equal to the amplitude b of the first drive signal. And the pulse width a2 of the second component signal is greater than the switch-on duration threshold of the charge pump switch.
The terminal may then superimpose the first component signal with the second component signal to obtain the second drive signal. The time domain waveform of the second drive signal is shown in fig. 3.
In step S104, the charge pump switch is driven according to the second drive signal.
For example, after obtaining the second driving signal, the terminal may drive the charge pump switch according to the second driving signal.
It can be understood that, since the sum of the pulse widths of the first component signal and the second component signal used for superimposing and forming the second driving signal is equal to the pulse width of the first driving signal, the amplitude of the first component signal is smaller than the amplitude of the first driving signal, the amplitude of the second component signal is equal to the amplitude of the first driving signal, and the periods of the first component signal and the second component signal are both equal to the period of the first driving signal, the spectral energy of the second driving signal will be smaller than that of the first driving signal (the area of the time domain waveform of the second driving signal is smaller than that of the time domain waveform of the first driving signal, and the spectral energy of the second driving signal is reflected on the spectral energy, that is, the spectral energy of the second driving signal is smaller than that of the first driving signal). Therefore, compared with the first driving signal, after the charge pump switch is driven according to the second driving signal, the interference of harmonic components generated by the charge pump switch on the terminal communication frequency band is reduced.
Of course, in another embodiment, the terminal may generate three or more component signals. Referring to fig. 4, for example, the terminal generates three component signals with different amplitudes, such as a third component signal, a fourth component signal and a fifth component signal. These three component signals may satisfy the following condition: the sum of the pulse width a3 of the third component signal, the pulse width a4 of the fourth component signal and the pulse width a5 of the fifth component signal is equal to the pulse width a of the first drive signal, i.e., a3+ a4+ a5= a; the amplitude b3 of the third component signal and the amplitude b4 of the fourth component signal are both smaller than the amplitude b of the first drive signal, the amplitude b5 of the fifth component signal is equal to the amplitude b of the first drive signal, and the amplitude b3 of the third component signal is larger than the amplitude b4 of the fourth component signal; the periods of the third component signal, the fourth component signal and the fifth component signal may all be equal to the period T of the first drive signal. Meanwhile, the pulse width a5 of the fifth component signal is equal to the switch-on duration threshold corresponding to the charge pump switch.
After the third component signal, the fourth component signal and the fifth component signal are superimposed, a third driving signal can be obtained, and the time domain waveform of the third driving signal can be as shown in fig. 4.
Referring to fig. 5, similarly, the terminal generates three component signals with different amplitudes, for example, a sixth component signal, a seventh component signal, and an eighth component signal. These three component signals may satisfy the following condition: the sum of the pulse width a6 of the sixth component signal, the pulse width a7 of the seventh component signal and the pulse width a8 of the eighth component signal is equal to the pulse width a of the first drive signal, i.e., a6+ a7+ a8= a; the amplitude b6 of the sixth component signal and the amplitude b8 of the eighth component signal are both smaller than the amplitude b of the first drive signal, the amplitude b7 of the seventh component signal is equal to the amplitude b of the first drive signal, and the amplitude b6 of the sixth component signal is larger than the amplitude b8 of the eighth component signal; the periods of the sixth, seventh, and eighth component signals may all be equal to the period T of the first drive signal. Meanwhile, the pulse width a7 of the seventh component signal is equal to the switch-on duration threshold corresponding to the charge pump switch.
The time domain waveform of the fourth driving signal obtained by superimposing the sixth component signal, the seventh component signal and the eighth component signal may be as shown in fig. 5.
It can be understood that when the terminal generates a plurality of component signals with different amplitudes, the driving signal formed by superimposing the plurality of component signals may hardly affect the operation performance of the charge pump switch: the sum of the pulse widths of the plurality of component signals is equal to the pulse width of the first drive signal; the period of each component signal is equal to the period of the first driving signal; the amplitude of one and only one component signal is equal to the amplitude of the first driving signal, the amplitudes of other component signals are all smaller than the amplitude of the first driving signal, and the pulse width of the component signal with the amplitude equal to the amplitude of the first driving signal is larger than or equal to the switch conduction time length threshold value corresponding to the charge pump switch.
In other embodiments, the sum of the pulse widths of the plurality of component signals generated by the terminal may be greater than or less than the pulse width of the first driving signal. For example, the sixth component signal, the seventh component signal, and the eighth component signal in fig. 5 are taken as examples. In another embodiment, the sum of a6, a7, a8 may also be greater or smaller than the pulse width a of the first drive signal. For example, if a has a value of 20, then the sum of a6, a7, and a8 may have a value of 21, 19, etc. As long as the condition that the spectral energy of the signal obtained by superimposing the sixth component signal, the seventh component signal, and the eighth component signal is smaller than the spectral energy of the first drive signal is satisfied.
In other embodiments, the amplitude of one and only one of the plurality of component signals generated by the terminal may be greater than the amplitude of the first drive signal, while the amplitudes of the other component signals are less than the amplitude of the first drive signal. For example, the amplitude b7 of the seventh component signal in fig. 5 may be larger than the amplitude b of the first drive signal. For example, b has a value of 25, then b7 may have a value of 26 or 27, and so on. As long as the condition that the spectral energy of the signal obtained by superimposing the sixth component signal, the seventh component signal, and the eighth component signal is smaller than the spectral energy of the first drive signal is satisfied.
In other embodiments, the period of the plurality of component signals generated by the terminal may not be equal to the period of the first driving signal. As long as the condition that the spectral energy of the signal obtained after superimposing the respective component signals is smaller than the spectral energy of the first drive signal is satisfied.
In the method for adjusting the driving signal provided in this embodiment, when it is detected that the harmonic frequency generated by the charge pump switch causes interference to the currently used communication frequency band of the terminal, the terminal may obtain the first driving signal corresponding to the charge pump switch. Then, the terminal may generate at least two component signals with different amplitudes according to the first driving signal, and superimpose the at least two component signals with different amplitudes to obtain a second driving signal. The second drive signal satisfies the condition that the spectral energy is less than the first drive signal. The terminal may then drive the charge pump switch in accordance with the second drive signal. Because the frequency spectrum energy of the second driving signal is less than that of the first driving signal, the interference of the harmonic frequency generated by the charge pump switch on the terminal communication frequency band can be reduced when the charge pump switch is driven according to the second driving signal.
Referring to fig. 6, fig. 6 is another schematic flow chart of a method for adjusting a driving signal according to an embodiment of the present invention, where the flow chart includes:
in step S201, when it is detected that the harmonic frequency corresponding to the charge pump switch interferes with the terminal communication frequency band, the terminal obtains the pulse width, the period, and the amplitude of the first driving signal corresponding to the charge pump switch, and the switch on-time threshold corresponding to the charge pump switch.
For example, when the touch screen is in a bright screen state and the terminal performs a call service, the terminal may first obtain a current operating frequency, for example, f0, of a charge pump switch of the touch screen and a communication frequency band used by the terminal. Then, the terminal can calculate according to the current working frequency of the charge pump to obtain corresponding harmonic frequency spectrums, wherein the frequencies of harmonic components in the harmonic frequency spectrums are 2f0, 3f0, 4f0 \8230; \8230andNf 0 respectively. Then, if it is determined that the frequency of a certain harmonic component in the harmonic spectrum is in the currently used communication frequency band of the terminal, or the frequency interval with the communication frequency band is smaller than or equal to a preset threshold, the terminal may determine that the harmonic frequency corresponding to the charge pump switch of the touch screen interferes with the communication frequency band of the terminal. At this time, the terminal may obtain a pulse width, a period, and an amplitude of the first driving signal corresponding to the charge pump switch, and a switch on-time threshold of the charge pump switch.
For example, the pulse width of the first driving signal corresponding to the charge pump switch acquired by the terminal is a, the amplitude is b, and the period is T.
It should be noted that the switch on-time threshold corresponding to the charge pump switch is the shortest on-time required for normal operation corresponding to the charge pump switch. The switch on time threshold may be obtained from a control module of the charge pump switch. Various parameters of the charge pump switch are stored in a control module of the charge pump switch.
In step S202, the terminal generates at least two component signals with unequal amplitudes, which satisfy the condition: the sum of the pulse widths of the at least two component signals is equal to the pulse width of the first driving signal, the period of each component signal is equal to the period of the first driving signal, the amplitude of only one of the at least two component signals is greater than or equal to the amplitude of the first driving signal, and the pulse width of the component signal of which the amplitude is greater than or equal to the amplitude of the first driving signal is greater than or equal to the switch-on duration threshold.
In step S203, the terminal superimposes the at least two component signals with different amplitudes to obtain a second driving signal, where the spectral energy of the second driving signal is smaller than that of the first driving signal.
For example, steps S202 and S203 may include:
after acquiring the pulse width a, the period T, and the amplitude b of the first driving signal corresponding to the charge pump switch, and the switch on-time threshold of the charge pump switch, the terminal may generate two component signals with different amplitudes, such as a first component signal and a second component signal, respectively. The two component signals with unequal amplitudes satisfy the following condition: the sum of the pulse widths of the first component signal and the second component signal is equal to the pulse width of the first drive signal; the periods of the first component signal and the second component signal are both equal to the period of the first drive signal; the amplitude of one and only one of the two component signals is greater than or equal to the amplitude of the first drive signal, e.g. the amplitude of the second component signal is equal to the amplitude of the first drive signal and the amplitude of the first component signal is smaller than the amplitude of the first drive signal. And the pulse width of the second component signal is greater than the switch-on duration threshold corresponding to the charge pump switch.
For example, the first component signal has a pulse width a1, an amplitude b1, and a period T1. The second component signal has a pulse width a2, an amplitude b2, and a period T2. Then, a1+ a2= a, b1< b, b2= b, T1= T2= T. And b2 is greater than or equal to the switch conduction time length threshold corresponding to the charge pump switch. That is, the duration occupied by the pulse width of the second component signal is greater than or equal to the shortest on-duration required by the charge pump switch.
The time domain waveforms of the first and second component signals may be as shown in fig. 2.
After generating the first component signal and the second component signal, the terminal may superimpose the first component signal and the second component signal to obtain the second driving signal. It can be understood that, since the sum of the pulse widths of the first component signal and the second component signal for superimposing and forming the second driving signal is equal to the pulse width of the first driving signal, the amplitude of the first component signal is smaller than the amplitude of the first driving signal, the amplitude of the second component signal is equal to the amplitude of the first driving signal, and the periods of the first component signal and the second component signal are both equal to the period of the first driving signal, the spectral energy of the second driving signal will be smaller than the first driving signal (the area of the time domain waveform of the second driving signal is smaller than the area of the time domain waveform of the first driving signal, and the spectral energy of the second driving signal is reflected on the spectral energy, that is, the spectral energy of the second driving signal is smaller than the spectral energy of the first driving signal).
The time domain waveform of the second drive signal may be as shown in fig. 2.
In step S204, the terminal drives the charge pump switch according to the second drive signal.
For example, after obtaining the second driving signal, the terminal may drive a charge pump switch of the touch screen according to the second driving signal. That is, the drive signal of the charge pump switch is switched from the first drive signal to the second drive signal.
It can be understood that, since the second driving signal has smaller spectral energy than the first driving signal, the interference of the harmonic component generated by the charge pump switch on the communication band of the terminal after the charge pump switch is driven according to the second driving signal is reduced compared to the first driving signal.
In step S205, when detecting that the communication band is changed, the terminal determines the changed communication band.
In step S206, if it is determined that the harmonic frequency of the first driving signal does not interfere with the changed communication frequency band, the terminal switches the driving signal of the charge pump switch from the second driving signal to the first driving signal.
For example, steps S205 and S206 may include:
after the driving signal of the charge pump switch of the touch screen is adjusted from the first driving signal to the second driving signal, the terminal can detect the communication frequency band used by the terminal. When detecting that the communication frequency band of the terminal changes, the terminal may determine the communication frequency band used after the change. Then, the terminal may determine whether the harmonic component generated by the first driving signal may interfere with the changed communication frequency band.
If it is determined that the harmonic component generated by the first driving signal does not interfere with the changed communication frequency band, the terminal may switch the driving signal of the touch screen charge pump switch back to the first driving signal.
It will be appreciated that switching the drive signal of the charge pump switch of the touch screen back to the first drive signal may ensure that the operational performance of the charge pump switch is fully restored.
If it is determined that the harmonic component generated by the first driving signal still interferes with the changed communication frequency band, the terminal may continue to use the second driving signal to drive the charge pump switch, so as to reduce interference of the harmonic component generated by the charge pump switch on the communication frequency band.
In one implementation, the embodiment of the present invention may further include the following steps:
and when the end of the communication service of the terminal is detected, the control terminal drives the charge pump switch by adopting a first driving signal.
For example, if the terminal detects that the user has finished the call service, the terminal may switch the driving signal of the charge pump switch of the touch screen from the second driving signal back to the first driving signal.
It will be appreciated that switching the drive signal of the charge pump switch of the touch screen back to the first drive signal may ensure that the operational performance of the charge pump switch is fully restored.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an adjusting device of a driving signal according to an embodiment of the present invention. The driving signal adjusting apparatus 300 may include: an acquisition module 301, a generation module 302, a superposition module 303, and a driving module 304.
The obtaining module 301 is configured to obtain a first driving signal corresponding to a charge pump switch when it is detected that a harmonic frequency corresponding to the charge pump switch interferes with a terminal communication frequency band.
For example, when the touch screen is in a bright screen state and the terminal performs a call service, the terminal may first obtain a current operating frequency, for example, f0, of a charge pump switch of the touch screen and a communication frequency band used by the terminal. Then, the terminal can calculate and obtain corresponding harmonic frequency spectrums according to the current working frequency of the charge pump, wherein the frequencies of harmonic components in the harmonic frequency spectrums are 2f0, 3f0 and 4f0 \8230; \8230andNf 0 respectively. If the frequency of a certain harmonic component in the harmonic spectrum is judged to be in the communication frequency band currently used by the terminal, or the frequency interval between the certain harmonic component and the communication frequency band is smaller than or equal to a preset threshold value, the terminal can determine that the harmonic frequency corresponding to the charge pump switch of the touch screen generates interference on the communication frequency band of the terminal. At this time, the obtaining module 301 of the terminal may first obtain a driving signal, that is, a first driving signal, currently corresponding to the charge pump switch of the touch screen.
For example, the obtaining module 301 may obtain the pulse width, amplitude, and period of the first driving signal, and the switch on duration threshold of the touch screen charge pump switch.
A generating module 302, configured to generate at least two component signals with different amplitudes according to the first driving signal.
The superimposing module 303 is configured to superimpose the at least two component signals with different amplitudes to obtain a second driving signal, where the frequency spectrum energy of the second driving signal is smaller than that of the first driving signal.
For example, after the obtaining module 301 obtains a first driving signal corresponding to a charge pump switch of the touch screen, the generating module 302 may generate at least two component signals with different amplitudes according to the first driving signal. The at least two component signals with different amplitudes may then be superimposed by the superimposing module 303 of the terminal, resulting in the second drive signal. The second drive signal satisfies the condition that the spectral energy is less than the first drive signal.
In one embodiment, the obtaining module 301 may obtain a pulse width, an amplitude, a period of the first driving signal, and a switch on duration threshold corresponding to the charge pump switch. It should be noted that the switch on-time threshold corresponding to the charge pump switch is the shortest on-time required by the charge pump switch. The switch on time threshold may be obtained from a control module of the charge pump switch. Various parameters of the charge pump switch are stored in a control module of the charge pump switch.
Then, the generating module 302 may generate at least two component signals with different amplitudes according to the pulse width, the amplitude, and the period of the first driving signal and the switch on duration threshold corresponding to the charge pump switch. The at least two component signals of unequal amplitude may satisfy the following condition: the sum of the pulse widths of the at least two component signals is equal to the pulse width of the first drive signal; the period of each component signal is equal to the period of the first drive signal; the amplitude of one and only one of the at least two component signals is greater than or equal to the amplitude of the first driving signal, and the pulse width of the component signal of which the amplitude is greater than or equal to the amplitude of the first driving signal is greater than or equal to the switch conduction time length threshold corresponding to the charge pump switch.
For example, the generating module 302 generates a first component signal and a second component signal that are unequal in amplitude. The sum of the pulse widths of the first component signal and the second component signal is equal to the pulse width of the first drive signal; the periods of the first component signal and the second component signal are both equal to the period of the first drive signal; the amplitude of the first component signal is smaller than that of the first driving signal, the amplitude of the second component signal is equal to that of the first driving signal, and the pulse width of the second component signal is larger than the switch conduction time length threshold of the charge pump switch.
The superposition module 303 may then superpose the first component signal and the second component signal, thereby obtaining a second driving signal.
A driving module 304, configured to drive the charge pump switch according to the second driving signal.
For example, after obtaining the second driving signal, the driving module 304 of the terminal may drive the charge pump switch of the touch screen according to the second driving signal.
It should be noted that, in other embodiments, the sum of the pulse widths of the multiple component signals generated by the generating module 302 may also be greater than or less than the pulse width of the first driving signal. For example, the sixth component signal, the seventh component signal, and the eighth component signal in fig. 5 are taken as examples. In one embodiment, the sum of a6, a7, and a8 may also be greater than or less than the pulse width a of the first driving signal. For example, if a has a value of 20, then the sum of a6, a7, and a8 may have a value of 21, 19, etc. As long as the condition that the spectral energy of the signal obtained by superimposing the sixth component signal, the seventh component signal, and the eighth component signal is smaller than the spectral energy of the first drive signal is satisfied.
In other embodiments, the amplitude of one and only one of the plurality of component signals generated by the generation module 302 may be greater than the amplitude of the first drive signal. For example, the amplitude b7 of the seventh component signal in fig. 5 may be larger than the amplitude b of the first drive signal. For example, b has a value of 25, then b7 may have a value of 26 or 27, and so on. The condition that the spectral energy of a signal obtained by superimposing the sixth component signal, the seventh component signal, and the eighth component signal is smaller than the spectral energy of the first drive signal may be satisfied.
In other embodiments, the period of the plurality of component signals generated by the generating module 302 may not be equal to the period of the first driving signal. As long as the condition that the spectral energy of the signal obtained after superimposing the respective component signals is smaller than the spectral energy of the first drive signal is satisfied.
Referring to fig. 8, fig. 8 is another schematic structural diagram of an adjusting device of a driving signal according to an embodiment of the present invention. In an embodiment, the adjusting apparatus 300 of the driving signal may further include: a control module 305 and a switching module 306.
A control module 305, configured to, when detecting that the communication service of the terminal is ended, control the terminal to drive the charge pump switch by using the first driving signal.
For example, if the terminal detects that the user has ended the call service, the control module 305 may switch the driving signal of the charge pump switch of the touch screen from the second driving signal back to the first driving signal.
It will be appreciated that switching the drive signal of the charge pump switch of the touch screen back to the first drive signal can ensure that the operational performance of the charge pump switch is fully restored.
A switching module 306, configured to determine a changed communication frequency band when detecting that a communication frequency band of the terminal changes; and if the harmonic frequency of the first driving signal is judged not to interfere with the changed communication frequency band, switching the driving signal of the charge pump switch from the second driving signal to the first driving signal.
For example, after the driving module 304 adjusts the driving signal of the charge pump switch of the touch screen from the first driving signal to the second driving signal, the terminal may detect the communication frequency band used by the terminal. When detecting that the communication frequency band of the terminal changes, the switching module 306 may determine the communication frequency band used after the change. Then, the switching module 306 may determine whether the harmonic component generated by the first driving signal will interfere with the changed communication frequency band.
If it is determined that the harmonic component generated by the first driving signal does not interfere with the changed communication frequency band, the switching module 306 may switch the driving signal of the touch screen charge pump switch back to the first driving signal.
It will be appreciated that switching the drive signal of the charge pump switch of the touch screen back to the first drive signal may ensure that the operational performance of the charge pump switch is fully restored.
If it is determined that the harmonic component generated by the first driving signal still interferes with the changed communication frequency band, the terminal may continue to use the second driving signal to drive the charge pump switch, so as to reduce interference of the harmonic component generated by the charge pump switch on the communication frequency band.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the method for adjusting a driving signal provided by the embodiment of the present invention.
The embodiment of the present invention further provides a mobile terminal, where the mobile terminal may include a memory, a processor, and a computer program stored in the memory and executable in the processor, and the processor implements the steps in the method for adjusting a driving signal according to the embodiment of the present invention when executing the computer program.
For example, the mobile terminal may be a tablet computer or a smart phone, etc. Referring to fig. 9, fig. 9 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. The mobile terminal 500 may include Radio Frequency (RF) circuitry 501, memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a Wireless Fidelity (WiFi) module 505, a processor 506 including one or more processing cores, and the like. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 9 is not intended to be limiting of mobile terminals and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The rf circuit 501 may be used for receiving and transmitting information, or receiving and transmitting signals during a call, and in particular, receives downlink information of a base station and then sends the received downlink information to one or more processors 506 for processing; in addition, data relating to uplink is transmitted to the base station.
The memory 502 may be used to store applications and data. Memory 502 stores applications containing executable code. The application programs may constitute various functional modules. The processor 506 executes various functional applications and data processing by running the application programs stored in the memory 502.
The input unit 503 may be used to receive input numbers, character information, or user characteristic information (such as a fingerprint), and generate a keyboard, mouse, joystick, optical, or trackball signal input related to user setting and function control. In an embodiment, the input unit 503 may include a touch-sensitive surface as well as other input devices. Touch sensitive surfaces, also known as touch display screens or touch pads.
The display unit 504 may be used to display information input by or provided to the user and various graphical user interfaces of the mobile terminal, which may be made up of graphics, text, icons, video, and any combination thereof.
Wireless fidelity (WiFi) belongs to a short-distance wireless transmission technology, and the mobile terminal can help the user to receive and send e-mails, browse web pages, access streaming media and the like through the wireless fidelity module 505, and provides wireless broadband internet access for the user.
The processor 506 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by running or executing an application program stored in the memory 502 and calling data stored in the memory 502, thereby integrally monitoring the mobile terminal.
Although not shown in fig. 9, the mobile terminal may further include a camera, a bluetooth module, and the like, which are not described in detail herein.
Specifically, in this embodiment, the processor 506 in the mobile terminal loads the executable code corresponding to the processes of one or more application programs into the memory 502 according to the following instructions, and the processor 506 runs the application programs stored in the memory 502, thereby implementing various functions:
when detecting that harmonic frequency corresponding to a charge pump switch generates interference on a terminal communication frequency band, acquiring a first driving signal corresponding to the charge pump switch; generating at least two component signals with unequal amplitudes according to the first driving signal; superposing the at least two component signals with different amplitudes to obtain a second driving signal, wherein the frequency spectrum energy of the second driving signal is smaller than that of the first driving signal; and driving the charge pump switch according to the second driving signal.
In one embodiment, when the step of obtaining the first driving signal corresponding to the charge pump switch is performed, the processor 506 may include: and acquiring the pulse width of the first driving signal corresponding to the charge pump switch. The processor 506, when performing the step of generating at least two component signals of unequal amplitude from the first drive signal, may comprise: and generating at least two component signals with different amplitudes according to the pulse width of the first driving signal, wherein the sum of the pulse widths of the at least two component signals with different amplitudes is equal to the pulse width of the first driving signal.
In an embodiment, processor 506 may further perform: and acquiring the period of the first driving signal corresponding to the charge pump switch. The processor 506, when performing the step of generating at least two component signals of unequal amplitude, may comprise: generating at least two component signals with unequal amplitudes, the period of each component signal being equal to the period of the first drive signal.
In an embodiment, processor 506 may further perform: and acquiring the amplitude of the first driving signal corresponding to the charge pump switch. The processor 506, when performing the step of generating at least two component signals of unequal amplitude, may comprise: generating at least two component signals of unequal amplitude, the amplitude of one and only one of the at least two component signals of unequal amplitude being greater than or equal to the amplitude of the first drive signal.
In one embodiment, processor 506 may further perform: and acquiring a switch conduction time threshold corresponding to the charge pump switch. The processor 506, when performing the step of generating at least two component signals of unequal amplitude, may comprise: and generating at least two component signals with different amplitudes, wherein the amplitude of one and only one of the at least two component signals with different amplitudes is greater than or equal to the amplitude of the first driving signal, and the pulse width of the component signal with the amplitude greater than or equal to the amplitude of the first driving signal is greater than or equal to the switch-on duration threshold.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. The mobile terminal 600 provided by the embodiment of the invention comprises a charge pump 601, a radio frequency circuit 602 and a processor 603.
The charge pump 601 is a dc-dc converter, which can increase or decrease the input voltage by the continuous switching of the internal switch module, so as to obtain the required output voltage. For example, a charge pump module exists in a touch screen system of a mobile terminal.
The radio frequency circuit 602 is configured to receive and transmit information or receive and transmit signals during a call, and in particular, receive downlink information of a base station and then send the received downlink information to one or more processors 603; in addition, data relating to uplink is transmitted to the base station.
The processor 603 is a control center of the mobile terminal, and connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions and data processing of the mobile terminal, thereby performing overall monitoring of the mobile terminal.
In addition, the mobile terminal may further include modules such as a wireless fidelity module, a memory, a bluetooth module, a power supply, and a camera, which are not described herein again.
In the embodiment of the present invention, the processor 603 is electrically connected to the charge pump 601 and the rf circuit 602.
The processor 603 is configured to obtain a first driving signal corresponding to the charge pump switch when it is detected that a harmonic frequency corresponding to the charge pump switch interferes with a communication frequency band corresponding to the radio frequency circuit 602;
the processor 603 is configured to generate at least two component signals with different amplitudes according to the first driving signal;
the processor 603 is configured to superimpose the at least two component signals with different amplitudes to obtain a second driving signal, where the spectral energy of the second driving signal is smaller than that of the first driving signal;
the charge pump 601 is configured to drive the charge pump switch according to the second driving signal.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed description of the adjustment method for the driving signal, and are not described again here.
The adjusting device of the driving signal provided in the embodiment of the present invention and the adjusting method of the driving signal in the above embodiments belong to the same concept, and any method provided in the adjusting method of the driving signal may be run on the adjusting device of the driving signal, and the specific implementation process thereof is described in detail in the adjusting method of the driving signal, and is not described herein again.
It should be noted that, for the method for adjusting a driving signal according to the embodiment of the present invention, it can be understood by a person skilled in the art that all or part of the process of implementing the method for adjusting a driving signal according to the embodiment of the present invention can be completed by controlling the relevant hardware through a computer program, where the computer program can be stored in a computer-readable storage medium, such as a memory, and executed by at least one processor, and during the execution process, the process of the embodiment of the method for adjusting a driving signal can be included. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
In the adjusting apparatus of the driving signal according to the embodiment of the present invention, each functional module may be integrated into one processing chip, or each module may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, or the like.
The method, the apparatus, the computer-readable storage medium, and the mobile terminal for adjusting a driving signal according to the embodiments of the present invention are described in detail above, and specific embodiments are applied in this document to explain the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method for adjusting a driving signal, the method comprising:
when detecting that harmonic frequency corresponding to a charge pump switch generates interference on a terminal communication frequency band, acquiring a first driving signal corresponding to the charge pump switch, wherein the first driving signal is a driving signal currently corresponding to the charge pump switch;
wherein the obtaining the first driving signal corresponding to the charge pump switch comprises: acquiring any one or more of pulse width, amplitude and period of the first driving signal and a switch conduction time threshold corresponding to the charge pump switch;
generating at least two component signals with different amplitudes, wherein the amplitude of one and only one of the at least two component signals with different amplitudes is larger than or equal to the amplitude of the first driving signal; the period of each component signal is equal to the period of the first driving signal, the sum of the pulse widths of the component signals is equal to the pulse width of the first driving signal, and the pulse width of the component signal with the amplitude larger than or equal to the amplitude of the first driving signal is larger than or equal to the switch-on duration threshold;
superposing the at least two component signals with different amplitudes to obtain a second driving signal, wherein the frequency spectrum energy of the second driving signal is smaller than that of the first driving signal, and the area of the time domain waveform of the second driving signal is smaller than that of the time domain waveform of the first driving signal;
and driving the charge pump switch according to the second driving signal.
2. The method for adjusting the driving signal according to claim 1, wherein the obtaining the first driving signal corresponding to the charge pump switch includes:
acquiring the pulse width of a first driving signal corresponding to the charge pump switch;
generating at least two component signals with unequal amplitudes according to the first driving signal, comprising: and generating at least two component signals with different amplitudes according to the pulse width of the first driving signal, wherein the sum of the pulse widths of the at least two component signals with different amplitudes is equal to the pulse width of the first driving signal.
3. The method of adjusting a driving signal according to claim 1, further comprising:
acquiring the period of a first driving signal corresponding to the charge pump switch;
the generating at least two component signals of unequal amplitude comprises: generating at least two component signals with different amplitudes, wherein the period of each component signal is equal to the period of the first driving signal.
4. The method of adjusting a driving signal according to claim 1, further comprising:
acquiring the amplitude of a first driving signal corresponding to the charge pump switch;
the generating at least two component signals of unequal amplitude comprises: generating at least two component signals of unequal amplitude, the amplitude of one and only one of the at least two component signals of unequal amplitude being greater than or equal to the amplitude of the first drive signal.
5. The method of adjusting a driving signal according to claim 4, further comprising:
acquiring a switch conduction time threshold corresponding to the charge pump switch;
the generating at least two component signals of unequal amplitude comprises: generating at least two component signals with different amplitudes, wherein the amplitude of one and only one of the component signals with different amplitudes is larger than or equal to the amplitude of the first driving signal, and the pulse width of the component signal with the amplitude larger than or equal to the amplitude of the first driving signal is larger than or equal to the switch-on duration threshold.
6. The method of adjusting a driving signal according to claim 1, further comprising:
and when the communication service of the terminal is detected to be finished, controlling the terminal to drive the charge pump switch by adopting the first driving signal.
7. The method of adjusting a driving signal according to claim 1, further comprising:
when the communication frequency band of the terminal is detected to be changed, determining the changed communication frequency band;
and if the harmonic frequency of the first driving signal is judged not to interfere with the changed communication frequency band, switching the driving signal of the charge pump switch from the second driving signal to the first driving signal.
8. A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the steps in the adjustment method of the driving signal according to any one of claims 1 to 7.
9. A mobile terminal comprising a memory, a processor, and a computer program stored in the memory and executable in the processor, wherein the processor implements the steps of the method for adjusting a driving signal according to any one of claims 1 to 7 when executing the computer program.
10. A mobile terminal comprises a charge pump, a radio frequency circuit and a processor, wherein the processor is electrically connected with the charge pump and the radio frequency circuit;
the processor is used for acquiring a first driving signal corresponding to the charge pump switch when detecting that the harmonic frequency corresponding to the charge pump switch generates interference on the communication frequency band corresponding to the radio frequency circuit, wherein the first driving signal is a driving signal currently corresponding to the charge pump switch;
wherein the obtaining the first driving signal corresponding to the charge pump switch includes: acquiring any one or more of pulse width, amplitude and period of the first driving signal and a switch conduction time threshold corresponding to the charge pump switch;
the processor is used for generating at least two component signals with different amplitudes according to the first driving signal, and the amplitude of only one component signal in the at least two component signals with different amplitudes is larger than or equal to the amplitude of the first driving signal; the period of each component signal is equal to the period of the first driving signal, the sum of the pulse widths of each component signal is equal to the pulse width of the first driving signal, and the pulse width of the component signal with the amplitude larger than or equal to the amplitude of the first driving signal is larger than or equal to the switch-on duration threshold;
the processor is configured to superimpose the at least two component signals with different amplitudes to obtain a second driving signal, where the spectral energy of the second driving signal is smaller than that of the first driving signal, and the area of a time-domain waveform of the second driving signal is smaller than that of the time-domain waveform of the first driving signal;
the charge pump is used for driving the charge pump switch according to the second driving signal.
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