CN114125089A - Terminal device, signal processing method and device, and storage medium - Google Patents
Terminal device, signal processing method and device, and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
- H04M1/035—Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Abstract
The present disclosure relates to a terminal device and a signal processing method. The terminal device includes: a screen; a sound cavity; the sound absorption medium is positioned in the sound cavity; the vibrating membrane is attached to the screen and is positioned on two opposite sides of the sound cavity together with the sound-absorbing medium; the vibrating membrane is used for generating a vibrating signal, and the vibrating signal is used for triggering the screen to vibrate to generate an acoustic signal. Through this disclosed embodiment, can realize the screen sound production while, through the sound chamber in the terminal equipment with inhale the sound medium, can improve the performance of each frequency channel in the acoustic signal for the frequency response curve that the acoustic signal corresponds is flatter, has improved the screen sound production effect.
Description
Technical Field
The present disclosure relates to the field of audio technologies, and in particular, to a terminal device, a signal processing method and apparatus, and a storage medium.
Background
With the non-porous design of terminal devices such as smart phones, tablet computers, televisions and the like, screen sounding is becoming a trend of outputting acoustic signals. The existing screen sounding adopts a film attached under the screen or a film attached under the cover glass of the screen. The screen is driven to vibrate through the vibration of the film, so that the screen can sound. However, the existing method for directly placing the film under the screen has pits or peaks in the frequency response curve, and the pits or peaks represent the problem of poor sounding effect of the screen.
Disclosure of Invention
The disclosure provides a terminal device, a signal processing method and apparatus, and a storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided a terminal device, including:
a screen;
a sound cavity;
the sound absorption medium is positioned in the sound cavity;
the vibrating membrane is attached to the screen and is positioned on two opposite sides of the sound cavity together with the sound-absorbing medium;
the vibrating membrane is used for generating a vibrating signal, and the vibrating signal is used for triggering the screen to vibrate to generate an acoustic signal.
In some embodiments, the terminal device further comprises:
the middle frame and the inner surface of the screen enclose the sound cavity;
the vibrating membrane is attached to the screen in the sound cavity.
In some embodiments, the screen includes a substrate base plate and a protective module protecting the substrate base plate; the protection module includes: a foam layer and a metal foil layer;
the foam layer is recessed towards the direction departing from the metal foil layer to form a groove;
the groove and the metal foil layer enclose the sound cavity;
the vibrating membrane is attached to the bottom of the groove.
In some embodiments, the terminal device further comprises:
the filter is used for filtering the electric signal to be output to obtain a filtered electric signal;
the amplifier is connected with the filter and used for amplifying the filtered electric signal and outputting the amplified electric signal;
the vibration membrane is connected with the amplifier and used for generating the vibration signal based on the amplified electric signal.
In some embodiments, the terminal device further comprises: a camera;
the screen has a first area and a second area; wherein the first area and the camera are located on the same side of the screen; the second area and the camera are positioned on the opposite side of the screen;
the vibrating membranes are at least two, and comprise: first and second diaphragms:
a first diaphragm located on the first region for generating the vibration signal in an earpiece mode;
and the second vibration film is positioned on the second area, is arranged at a distance from the first vibration film and is used for generating the vibration signal in a loudspeaker mode.
In some embodiments, the screen has a third region thereon; the third area comprises a fingerprint identification area or a setting area of a transmission interface for transmitting a driving signal;
the diaphragm is located on a region other than the third region on the screen.
In some embodiments, the diaphragm comprises:
a plurality of piezoelectric films made of a piezoelectric material; a plurality of the piezoelectric films are stacked.
In some embodiments, the sound absorbing medium comprises sound absorbing foam or a sound absorbing mesh.
According to a second aspect of the embodiments of the present disclosure, there is provided a signal processing method applied to the terminal device in the first aspect, the signal processing method including:
receiving an electrical signal to be output;
filtering out the electric signal of at least one frequency band from the electric signal to be output to obtain a filtered electric signal; wherein a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal of the at least one frequency band; amplifying the filtered electric signal to obtain an amplified electric signal;
and outputting the amplified electric signal to a vibration film of the terminal equipment, so that the vibration film drives a screen of the terminal equipment to vibrate to generate an acoustic signal.
In some embodiments, the amplifying the filtered electrical signal to obtain an amplified electrical signal includes:
and in the earphone mode, amplifying the filtered electric signal to obtain a first electric signal.
In some embodiments, the amplifying the filtered electrical signal to obtain an amplified electrical signal includes:
in a loudspeaker mode, amplifying the filtered electric signal to obtain a second electric signal; wherein a voltage value of the first electrical signal is smaller than a voltage value of the second electrical signal.
In some embodiments, the filtering, from the electrical signal to be output, an electrical signal in at least one frequency band to obtain a filtered electrical signal includes:
and filtering the electric signal of which the center frequency of the at least one frequency band is less than a preset frequency from the electric signal to be output to obtain the filtered electric signal.
According to a third aspect of the embodiments of the present disclosure, there is provided a signal processing apparatus including:
a receiving module configured to receive an electrical signal to be output;
the filtering module is configured to filter the electric signals of at least one frequency band from the electric signals to be output to obtain filtered electric signals; wherein a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal of the at least one frequency band;
the amplifying module is configured to amplify the filtered electric signal to obtain an amplified electric signal;
the output module is configured to output the amplified electric signal to a vibrating membrane of the terminal device, so that the vibrating membrane drives a screen of the terminal device to vibrate to generate an acoustic signal.
In some embodiments, the amplifying module is further configured to amplify the filtered electrical signal in an earpiece mode to obtain a first electrical signal.
In some embodiments, the amplifying module is further configured to amplify the filtered electrical signal in a speaker mode to obtain a second electrical signal; wherein a voltage value of the first electrical signal is smaller than a voltage value of the second electrical signal.
In some embodiments, the filtering module is further configured to filter, from the electrical signal to be output, an electrical signal whose center frequency of the at least one frequency band is smaller than a preset frequency, so as to obtain the filtered electrical signal.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a signal processing apparatus, the apparatus including at least: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is configured to execute the executable instructions, and the executable instructions perform the steps of the signal processing method in the second aspect.
According to a fifth aspect of the embodiments of the present disclosure, there is provided a signal processing apparatus, wherein the computer-readable storage medium has stored therein computer-executable instructions, which when executed by a processor, implement the signal processing method in the second aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the embodiment of the disclosure is not a sounding principle of a traditional moving coil earphone and a loudspeaker, but a vibration signal generated by a vibrating membrane triggers a screen to vibrate to generate an acoustic signal, so that the screen can sound. Moreover, the terminal equipment of the embodiment of the disclosure comprises the sound cavity and the sound-absorbing medium positioned in the sound cavity, and the low-frequency performance of screen sounding can be improved through the attenuation of the sound cavity to sound signals; based on inhale the sound medium and have the characteristic of absorbing the acoustic signal, be used for enough turning into heat energy with the sound energy of acoustic signal, can improve the low frequency or the high frequency performance of screen sound production, so, this disclosed embodiment can improve the acoustic performance of acoustic signal at different frequency channels through introducing the sound chamber and inhaling the sound medium, reduces pit or the peak in the frequency response curve that the acoustic signal corresponds for the frequency response curve is more flat, and then improves the vocal effect of screen.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a first schematic diagram of a terminal device according to an exemplary embodiment.
Fig. 2 is a schematic diagram two of a terminal device according to an exemplary embodiment.
Fig. 3 is a third schematic diagram of a terminal device according to an example embodiment.
Fig. 4 is a fourth schematic diagram of a terminal device shown in accordance with an example embodiment.
Fig. 5a is a schematic diagram five illustrating a terminal device according to an exemplary embodiment.
Fig. 5b is a sixth schematic diagram of a terminal device according to an example embodiment.
Fig. 6a is a graph illustrating a frequency response before improvement, according to an example embodiment.
Fig. 6b is a schematic diagram illustrating an improved frequency response curve according to an exemplary embodiment.
Fig. 7 is a seventh schematic diagram illustrating a terminal device according to an example embodiment.
Fig. 8 is a flow chart illustrating a method of signal processing according to an example embodiment.
Fig. 9 is a schematic diagram illustrating a signal processing apparatus according to an exemplary embodiment.
Fig. 10 is a block diagram illustrating a terminal device according to an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a first schematic structural diagram of a terminal device according to an exemplary embodiment. As shown in fig. 1, the terminal device includes at least:
a screen 101;
an acoustic cavity 102;
a sound absorbing medium 103 located within the sound cavity 102;
a diaphragm 104 attached to the screen 101 and located on opposite sides of the sound-absorbing medium 103 in the sound cavity 102;
the vibration film 104 is configured to generate a vibration signal, and the vibration signal is configured to trigger the screen 101 to vibrate to generate an acoustic signal.
The terminal device may be a mobile terminal or a wearable electronic device, where the mobile terminal includes a mobile phone, a notebook, or a tablet computer, and the wearable electronic device includes a smart watch or smart glasses, and the embodiment of the disclosure is not limited.
The screen is used for displaying information. The screen includes a screen formed of an Organic Light-Emitting Diode (OLED) and a screen formed of a Liquid Crystal Display (LCD), and embodiments of the present disclosure are not limited thereto.
The acoustic cavity may be used to modify an acoustic signal. Wherein modifying the acoustic signal comprises: the noise in the acoustic signal is reduced, the position of the low-frequency peak in the frequency response curve corresponding to the acoustic signal is changed, or the position of the high-frequency peak in the frequency response curve corresponding to the acoustic signal is changed.
It should be noted that the sound cavity includes a rear cavity or a front cavity. For example, when the acoustic cavity is a back cavity, the low frequency part of the acoustic signal can be modified; when the sound cavity is a front cavity, the middle-high frequency part in the sound signal can be corrected.
The sound-absorbing medium has the characteristic of absorbing sound signals, and can convert sound energy corresponding to the sound signals into heat energy, so that the sound energy is lost. Wherein the sound absorption coefficient of the sound absorption medium is more than 0.2. The sound-absorbing medium is placed in the sound cavity, so that the transient characteristic of a frequency response curve corresponding to a sound signal can be improved, for example, the occurrence of pits or peaks in the frequency response curve corresponding to high frequency is reduced, and the frequency response curve corresponding to high frequency is flatter or smoother; the method can also be used for increasing the equivalent volume of the sound cavity on the basis of not increasing the space of the terminal equipment occupied by the sound cavity.
In the disclosed embodiments, the sound absorbing medium may be formed of a porous or porous material. In some embodiments, the sound absorbing medium comprises sound absorbing foam or a sound absorbing mesh. In other embodiments, the sound absorbing medium may further comprise sound absorbing fibers.
The vibrating membrane is used for generating a vibration signal. The diaphragm is attached to the screen. When the vibrating diaphragm vibrates, the vibrating diaphragm can drive the screen to vibrate, and then the screen is triggered to vibrate through the vibration signal to generate an acoustic signal, so that the screen is sounded.
In this disclosure, the terminal device may further include a fitting member, and the vibrating membrane may be fitted to the screen through the fitting member. The adhesive member includes, but is not limited to, double-sided tape.
It is noted that the screen has an outer screen surface, an inner screen surface, and an intermediate portion between the outer screen surface and the inner screen surface. The surface of the outer surface of the screen is a display surface of the screen, and the surface of the inner surface of the screen is the opposite surface of the display surface and faces the inside of the terminal equipment. The position of the vibrating membrane attached to the screen comprises: the vibrating membrane is attached to the middle part of the screen; alternatively, the diaphragm is attached to the inner surface of the screen, and the embodiments of the present disclosure are not limited thereto.
In the process of designing the vibrating membrane, the size of the vibrating membrane is positively correlated with the sound pressure of the sound signal under the condition that the thickness of the vibrating membrane is the same. That is, the larger the size of the diaphragm, the larger the boost of the acoustic signal, and the larger the volume of the corresponding screen sounding.
The number of the vibrating membranes is at least one, and when the number of the vibrating membranes is multiple, the vibrating membranes can be attached to the screen in an array mode, so that the vibrating membranes can simultaneously generate vibrating signals to drive the screen to generate the vibrating signals. So, set up the nimble overall arrangement that a plurality of diaphragms can enough realize the diaphragm, can also increase the size of the whole diaphragm of laminating on the screen through increasing the diaphragm number, and then can increase the volume of screen sound production.
In the embodiment of the present disclosure, the vibration film may generate a vibration signal by deformation of a material thereof, and for example, the vibration film may be a thin film formed of a piezoelectric material. The diaphragm may also be driven by a driving member to generate a vibration signal, for example, the driving member includes but is not limited to a micro motor, i.e., the vibration signal is generated by driving the diaphragm by the micro motor.
In some embodiments, the diaphragm includes a plurality of piezoelectric films made of piezoelectric material, and the plurality of piezoelectric films may be stacked. So, through the range upon range of setting of a plurality of piezoelectric film, the vibration range of multiplicable vibrating diaphragm, and then the drive screen vibration that can be better is in order to realize the screen sound production.
The piezoelectric material has an inverse piezoelectric effect, and when the vibrating membrane is electrified, the vibrating membrane can deform based on the inverse piezoelectric effect of the piezoelectric material, and the screen is driven to vibrate, so that air is pushed to vibrate and sound. In addition, the thickness of the laminated piezoelectric films is positively correlated with the boost of the sound signal under the same size of the vibration film, that is, the thicker the thickness of the vibration film is, the larger the boost of the sound signal is, the larger the sound volume of the corresponding screen is.
Through this disclosed embodiment, this disclosed embodiment no longer is the vocal principle of traditional moving coil earphone and speaker, but triggers the screen vibration through the vibration signal that the vibrating diaphragm produced and produces the acoustic signal, can realize the screen sound production. And, the terminal equipment of this disclosed embodiment includes the sound chamber and is located the sound absorbing medium of sound intracavity, through sound chamber and sound absorbing medium, can improve the performance of each frequency channel in the acoustic signal, reduces pit or peak in the frequency response curve that the acoustic signal corresponds for the frequency response curve is flatter, and then improves the vocal effect of screen.
In some embodiments, as shown in fig. 2, the terminal device further includes:
a middle frame 105, which encloses the sound cavity 102 with the inner surface of the screen 101;
the diaphragm 104 is attached to the screen 101 in the sound cavity 102.
That is to say, the embodiment of the present disclosure may implement triggering the screen to generate the acoustic signal by the vibration generated by the vibrating membrane by attaching the vibrating membrane to the screen in the sound cavity.
In the embodiment of the present disclosure, the middle frame and the inner surface of the screen form a sound cavity, which may include: the surface of the middle frame facing the screen is sunken to form a pit, and a sound cavity is formed by the pit and the inner surface of the screen. The vibrating membrane is attached to the surface of the screen facing the pit, and the sound-absorbing medium is attached to the bottom of the pit.
It should be noted that, the concave pit of the middle frame not only can form a sound cavity with the inner surface of the screen, but also can support and fix the screen through the side wall of the concave pit. Therefore, the middle frame of the terminal equipment can support and fix the screen, and the sound cavity can be formed through the pits under the condition that the sound cavity does not additionally and independently increase to occupy the space of the terminal equipment, so that the space occupied in the terminal equipment is reduced, and the space utilization rate of the terminal equipment is improved.
In some embodiments, as shown in fig. 3, the screen includes a substrate base plate 101a and a protection module protecting the substrate base plate; the protection module includes: a foam layer 101b and a metal foil layer 101 c;
the foam layer 101b is recessed towards the direction back to the metal foil layer 101c to form a groove;
the groove and the metal foil layer 101c enclose the sound cavity 102;
the diaphragm 104 is attached to the bottom of the groove.
That is to say, this disclosed embodiment not only can be located the sound intracavity that center and screen formed with the vibrating diaphragm, still can be located the sound intracavity that recess and metal foil layer formed in the cotton layer of the bubble of screen internal protection module set formed. Therefore, the embodiment of the disclosure provides two different positions where the vibrating membrane can be arranged, and the flexibility of the arrangement of the vibrating membrane can be improved. Simultaneously, in laminating the vibrating diaphragm in the recess in the cotton layer of bubble of screen, can not need additionally solitary setting up the space and form the sound chamber on terminal equipment's center, reduced and set up the space that the sound chamber occupies in the terminal equipment alone, improved terminal equipment's space utilization.
In the disclosed embodiment, the substrate base plate can be arranged at the rear end of a backlight source in a screen formed by an LCD and used for supporting the backlight source; the substrate base plate can also be used as a carrier for an electrode layer in a screen formed by OLEDs at the rear end of the electrode layer.
It should be noted that the substrate base plate may be a base plate formed by glass or plastic, and the embodiments of the present disclosure are not limited.
In the embodiment of the disclosure, the protection module is used for protecting the substrate base plate so as to reduce the damage of the substrate base plate. The protection module comprises a foam layer and a metal foil layer. The foam layer is located between the metal foil layer and the substrate base plate.
The opening of the groove of the foam layer faces the metal foil layer. The vibrating membrane can be attached to the bottom of the groove, and correspondingly, the sound-absorbing medium can be attached to the metal foil layer in the sound cavity.
In an embodiment of the present disclosure, a screen has a display layer including a substrate base layer. The display layer is formed of light emitting diodes or liquid crystals. The vibrating membrane is arranged in a sound cavity formed by the groove and the metal foil layer, the metal foil layer forming the sound cavity is not used for a circuit layer of the display layer and is used for protecting the substrate base plate, and then the vibrating membrane can be arranged inside the screen under the influence of the vibration of the vibrating membrane on the display layer in the screen.
It should be noted that, the number of the grooves may be at least one, and when the number of the diaphragms is plural, the plural diaphragms may be respectively disposed on the tops of the corresponding plural different grooves. So, can enough realize the nimble overall arrangement of vibrating diaphragm, can also increase the size of the whole vibrating diaphragm of laminating on the screen through increasing the vibrating diaphragm number, and then can increase the volume of screen sound production.
The metal foil layer includes, but is not limited to, a copper foil layer.
In some embodiments, as shown in fig. 4, the terminal device further includes:
the filter 106 is configured to filter the electric signal to be output to obtain a filtered electric signal;
an amplifier 107 connected to the filter 106, for amplifying the filtered electrical signal and outputting the amplified electrical signal;
the vibration membrane 104 is connected to the amplifier 107, and is configured to generate the vibration signal based on the amplified electrical signal.
In the embodiment of the present disclosure, a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal obtained by the filter is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal before filtering. That is to say, can filter the great signal of telecommunication of difference between the adjacent sound pressure level through the wave filter, and then can reduce the frequency response curve that the acoustic signal that the screen vibration produced corresponds and the condition that the pit appears for the frequency response curve is more level and smooth, and then can improve the sound producing effect.
The filter may include a first filter that allows the frequency of the first frequency band to pass therethrough and a second filter that allows the frequency of the second frequency band to pass therethrough. The sound pressure levels of the first frequency band and the second frequency band corresponding to the frequency response curve can be improved through the first filter and the second filter, so that the frequency response curves of the first frequency band and the second frequency band are smoother.
Illustratively, the first frequency band may be included in a range of 300Hz to 1 KHz. The second frequency band may be comprised in the range of 1KHz to 4 KHz; alternatively, in the range of 4KHz to 10 KHz. The first filter may be a Low Pass Filter (LPF), and the second filter may be a High-pass filter (HPF), which is not limited in the embodiments of the disclosure.
The amplifier is used for amplifying the filtered electric signal. The amplifier comprises a high voltage amplifier. The high voltage amplifier is used for changing the voltage of the output electric signal.
The voltage of the amplified electrical signal is positively correlated with the voltage increase of the screen sound. That is, the larger the voltage of the amplified electrical signal output by the amplifier is, the larger the vibration amplitude generated by the diaphragm is, and further, the boosting of the screen sound is reduced, and the volume of the screen sound is increased.
In the embodiment of the disclosure, the screen sound production of the terminal device has an earphone mode and a speaker mode, and the voltage of the first electric signal required in the earphone mode is greater than the voltage of the second electric signal required in the speaker mode. Thus, when setting up an amplifier, the corresponding amplifier can be set for different modes. Illustratively, as shown in fig. 5a and 5b, a first amplifier 107a corresponding to an earphone may be set for an earphone mode and a second amplifier 107b corresponding to a speaker may be set for a speaker mode. Therefore, the amplifiers corresponding to different modes are arranged, and better sounding in different modes can be realized.
It should be noted that, the terminal device further includes a main processing module, and when the filter and the amplifier are both filtering and amplifying devices corresponding to analog signals, the filter and the amplifier may be an analog filter and an analog amplifier included in an equalizer in the main processing module. The main processing module comprises a main control chip.
The terminal equipment also comprises an auxiliary processing module, and when the filter and the amplifier are both filtering and amplifying devices corresponding to the digital signals, the filter and the amplifier can be a digital filter and a digital amplifier contained in an equalizer in the auxiliary processing module. The auxiliary Processing module includes a Digital Signal Processing (DSP) chip.
The embodiment of the disclosure can realize filtering and amplifying treatment on the electric signals to be output through different functional modules in the terminal equipment, and enables the treatment to be more flexible while generating a smooth frequency response curve to improve the sound production effect.
Fig. 6a is a schematic diagram of a frequency response curve before improvement, and fig. 6b is a schematic diagram of a frequency response curve after improvement of a terminal device in the embodiment of the present disclosure. As shown in fig. 6a, the frequency response curve shows a peak condition in the frequency range of 400Hz to 600Hz, in the frequency range of 1KHz to 3KHz, and in the frequency range of 6KHz to 10 KHz. As shown in fig. 6b, the solid line represents two frequency response curves before improvement, the dotted line represents two corresponding frequency response curves after improvement, and the terminal device can smooth the peaks of the frequency response curves in the frequency band range of 400Hz to 600Hz and in the frequency band range of 1KHz to 3KHz through the sound cavity and the filter; terminal equipment can make the frequency response curve obtain smoothly at the peak of the frequency channel within range of 6KHz to 10KHz through inhaling the sound module.
In some embodiments, as shown in fig. 7, the terminal device further includes: a camera 108;
the screen has a first area 101a and a second area 101 b; wherein the first area and the camera are located on the same side of the screen; the second area and the camera are positioned on the opposite side of the screen;
the vibrating membranes are at least two, and comprise: first and second diaphragms 104a and 104 b:
a first diaphragm 104a located on the first region 101a for generating the vibration signal in an earpiece mode;
a second diaphragm 104b, located on the second region 101b and spaced apart from the first diaphragm 104a, for generating the vibration signal in a speaker mode.
In the embodiment of the present disclosure, the camera is located at the top of the terminal device, that is, the first diaphragm located in the first area is close to the top of the terminal device, and the second diaphragm located in the second area is close to the bottom of the terminal device. Then, in the earphone mode, a vibration signal generated by the first vibration film can trigger a screen close to the top of the terminal device to sound; in the loudspeaker mode, the vibration signal generated by the second diaphragm triggers the sound production of the screen close to the bottom of the terminal device. Therefore, the use habits of the user in different modes are met, and the sound production effect and the user experience of the screen can be improved.
In the case where the number of the first diaphragms is plural, the plural first diaphragms may be arranged in an array in the first region. Similarly, the number of the second diaphragms may be at least one, and when the number of the second diaphragms is plural, the plural second diaphragms may be arranged in the second region in an array form.
In the embodiment of the present disclosure, the terminal device may set two different amplifiers for the earpiece mode and the speaker mode to respectively correspond to the first diaphragm and the second diaphragm, and may also set two different amplifiers for the earpiece mode and the speaker mode to share the same diaphragm. For example, the earpiece mode corresponds to a first amplifier that outputs a first electrical signal having a voltage that is less than a voltage of a second electrical signal output by a second amplifier, and the speaker mode corresponds to a second amplifier. So, based on first amplifier and second amplifier, can make same vibrating diaphragm produce the vibration of different amplitudes, and then make the sound signal that the screen can produce under earphone mode and speaker mode step up differently, and then realize the volume variation of screen sound production.
In some embodiments, the screen has a third region thereon; the third area comprises a fingerprint identification area or a setting area of a transmission interface for transmitting a driving signal;
the diaphragm is located on a region other than the third region on the screen.
That is to say, the vibrating membrane of the embodiment of the present disclosure is not disposed in the fingerprint identification area on the screen, so that the shielding of the vibrating membrane on the fingerprint signal in the fingerprint identification can be reduced, and the accuracy of the fingerprint identification is improved; in addition, the vibrating membrane cannot be arranged in the transmission interface, the connection looseness condition of the transmission interface can be reduced in the process that the vibrating membrane drives the screen to vibrate, and the connection reliability of the transmission interface is improved.
In the embodiment of the present disclosure, the transmission interface of the driving signal may be connected to a control module of the terminal device through a flexible circuit board, so as to control the screen display through a control signal of the control module.
The embodiment of the present disclosure further provides a signal processing method, which is applied to the terminal device in one or more of the above embodiments, and as shown in fig. 8, the method for the terminal device to execute signal processing includes the following steps:
s201, receiving an electric signal to be output;
s202, filtering out at least one frequency range electric signal from the electric signal to be output to obtain a filtered electric signal; wherein a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal of the at least one frequency band; amplifying the filtered electric signal to obtain an amplified electric signal;
s203, outputting the amplified electric signal to a vibrating membrane of the terminal equipment, so that the vibrating membrane drives a screen of the terminal equipment to vibrate to generate an acoustic signal.
The embodiment of the disclosure can filter and amplify the electric signal to be output, so that the frequency response curve of the acoustic signal output by the screen corresponding to at least one frequency band is smoother, the condition of the frequency response curve with a peak is reduced, and the screen sound production effect can be improved.
The terminal equipment can filter the electric signals of the multiple frequency bands through the different filters, and can reduce the peak condition corresponding to the multiple frequency bands in the frequency response curve, so that the frequency response curve is smoother in the whole process.
In some embodiments, the amplifying the filtered electrical signal to obtain an amplified electrical signal includes:
and in the earphone mode, amplifying the filtered electric signal to obtain a first electric signal.
In some embodiments, the amplifying the filtered electrical signal to obtain an amplified electrical signal includes:
in a loudspeaker mode, amplifying the filtered electric signal to obtain a second electric signal; wherein a voltage value of the first electrical signal is smaller than a voltage value of the second electrical signal.
In the embodiment of the disclosure, different amplification processing can be performed for the earphone mode setting and the speaker mode, and better sound production in different modes can be realized.
In some embodiments, the filtering, from the electrical signal to be output, an electrical signal in at least one frequency band to obtain a filtered electrical signal includes:
and filtering the electric signal of which the center frequency of the at least one frequency band is less than a preset frequency from the electric signal to be output to obtain the filtered electric signal.
In the embodiment of the disclosure, the electric signals of the multiple frequency bands smaller than the preset frequency can be filtered, so that the frequency response curves corresponding to the multiple frequency bands smaller than the preset frequency are smoother.
Illustratively, the predetermined frequency is in the range of 100Hz to 1 KHz.
The method in the above embodiment has been described in detail in the embodiment related to the terminal device, and will not be elaborated here.
The embodiment of the present disclosure also provides a signal processing apparatus, as shown in fig. 9, the signal processing apparatus includes:
a receiving module 1001 configured to receive an electrical signal to be output;
a filtering module 1002, configured to filter an electrical signal of at least one frequency band from the electrical signal to be output, so as to obtain a filtered electrical signal; wherein a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal of the at least one frequency band;
an amplifying module 1003 configured to amplify the filtered electrical signal to obtain an amplified electrical signal;
an output module 1004 configured to output the amplified electrical signal to a vibration film of a terminal device, so that the vibration film drives a screen of the terminal device to vibrate to generate an acoustic signal.
In some embodiments, the amplifying module 1003 is further configured to amplify the filtered electrical signal in an earpiece mode, so as to obtain a first electrical signal.
In some embodiments, the amplifying module 1003 is further configured to amplify the filtered electrical signal in a speaker mode to obtain a second electrical signal; wherein a voltage value of the first electrical signal is smaller than a voltage value of the second electrical signal.
In some embodiments, the filtering module 1002 is further configured to filter, from the electrical signals to be output, electrical signals whose center frequency of the at least one frequency band is smaller than a preset frequency, so as to obtain the filtered electrical signals.
It should be noted that "first", "second" and "third" in the embodiments of the present disclosure are merely for convenience of description and distinction, and have no other specific meaning.
Fig. 10 is a block diagram illustrating a terminal device according to an example embodiment. For example, the terminal device may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.
Referring to fig. 10, the terminal device may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.
The processing component 802 generally controls overall operation of the terminal device, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the terminal device. Examples of such data include instructions for any application or method operating on the terminal device, contact data, phonebook data, messages, pictures, videos, etc. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power component 806 provides power to various components of the terminal device. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the terminal device.
The multimedia component 808 includes a screen that provides an output interface between the terminal device and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. When the terminal device is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the terminal device is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 814 includes one or more sensors for providing various aspects of state assessment for the terminal device. For example, sensor assembly 814 may detect the open/closed status of the terminal device, the relative positioning of components, such as a display and keypad of the terminal device, the change in position of the terminal device or a component of the terminal device, the presence or absence of user contact with the terminal device, the orientation or acceleration/deceleration of the terminal device, and the change in temperature of the terminal device. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communication between the terminal device and other devices in a wired or wireless manner. The terminal device may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, communications component 816 further includes a Near Field Communications (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the terminal device may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described information processing methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the apparatus to perform the method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer-readable storage medium in which instructions, when executed by a processor of a terminal device, enable the terminal device to perform an information processing method, the method comprising:
receiving an electrical signal to be output;
filtering out the electric signal of at least one frequency band from the electric signal to be output to obtain a filtered electric signal; wherein a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal of the at least one frequency band; amplifying the filtered electric signal to obtain an amplified electric signal;
and outputting the amplified electric signal to a vibrating membrane of the terminal equipment, so that the vibrating membrane drives a screen of the terminal equipment to vibrate to generate an acoustic signal.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (18)
1. A terminal device, characterized in that the terminal device comprises:
a screen;
a sound cavity;
the sound absorption medium is positioned in the sound cavity;
the vibrating membrane is attached to the screen and is positioned on two opposite sides of the sound cavity together with the sound-absorbing medium;
the vibrating membrane is used for generating a vibrating signal, and the vibrating signal is used for triggering the screen to vibrate to generate an acoustic signal.
2. The terminal device according to claim 1, wherein the terminal device further comprises:
the middle frame and the inner surface of the screen enclose the sound cavity;
the vibrating membrane is attached to the screen in the sound cavity.
3. The terminal device according to claim 1, wherein the screen includes a substrate base plate and a protection module protecting the substrate base plate; the protection module includes: a foam layer and a metal foil layer;
the foam layer is recessed towards the direction departing from the metal foil layer to form a groove;
the groove and the metal foil layer enclose the sound cavity;
the vibrating membrane is attached to the bottom of the groove.
4. The terminal device according to any one of claims 1 to 3, wherein the terminal device further comprises:
the filter is used for filtering the electric signal to be output to obtain a filtered electric signal;
the amplifier is connected with the filter and used for amplifying the filtered electric signal and outputting the amplified electric signal;
the vibration membrane is connected with the amplifier and used for generating the vibration signal based on the amplified electric signal.
5. The terminal device according to any one of claims 1 to 3, wherein the terminal device further comprises: a camera;
the screen has a first area and a second area; wherein the first area and the camera are located on the same side of the screen; the second area and the camera are positioned on the opposite side of the screen;
the vibrating membranes are at least two, and comprise: first and second diaphragms:
a first diaphragm located on the first region for generating the vibration signal in an earpiece mode;
and the second vibration film is positioned on the second area, is arranged at a distance from the first vibration film and is used for generating the vibration signal in a loudspeaker mode.
6. A terminal device according to any one of claims 1 to 3, characterised in that the screen has a third area thereon; the third area comprises a fingerprint identification area or a setting area of a transmission interface for transmitting a driving signal;
the diaphragm is located on a region other than the third region on the screen.
7. A terminal device according to any of claims 1 to 3, wherein the diaphragm comprises:
a plurality of piezoelectric films made of a piezoelectric material; a plurality of the piezoelectric films are stacked.
8. A terminal device according to any of claims 1 to 3, wherein the sound absorbing medium comprises sound absorbing foam or a sound absorbing mesh.
9. A signal processing method applied to the terminal device of any one of claims 1 to 8, the method comprising:
receiving an electrical signal to be output;
filtering out the electric signal of at least one frequency band from the electric signal to be output to obtain a filtered electric signal; wherein a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal of the at least one frequency band;
amplifying the filtered electric signal to obtain an amplified electric signal;
and outputting the amplified electric signal to a vibration film of the terminal equipment, so that the vibration film drives a screen of the terminal equipment to vibrate to generate an acoustic signal.
10. The method of claim 9, wherein the amplifying the filtered electrical signal to obtain an amplified electrical signal comprises:
and in the earphone mode, amplifying the filtered electric signal to obtain a first electric signal.
11. The method of claim 10, wherein the amplifying the filtered electrical signal to obtain an amplified electrical signal comprises:
in a loudspeaker mode, amplifying the filtered electric signal to obtain a second electric signal; wherein a voltage value of the first electrical signal is smaller than a voltage value of the second electrical signal.
12. The method according to any one of claims 9 to 11, wherein filtering out at least one frequency band of the electrical signal from the electrical signal to be output to obtain a filtered electrical signal comprises:
and filtering the electric signal of which the center frequency of the at least one frequency band is less than a preset frequency from the electric signal to be output to obtain the filtered electric signal.
13. A signal processing apparatus, characterized by comprising:
a receiving module configured to receive an electrical signal to be output;
the filtering module is configured to filter the electric signals of at least one frequency band from the electric signals to be output to obtain filtered electric signals; wherein a difference between two adjacent sound pressure levels corresponding to the filtered electrical signal is smaller than a difference between two adjacent sound pressure levels corresponding to the electrical signal of the at least one frequency band;
the amplifying module is configured to amplify the filtered electric signal to obtain an amplified electric signal;
the output module is configured to output the amplified electric signal to a vibrating membrane of the terminal device, so that the vibrating membrane drives a screen of the terminal device to vibrate to generate an acoustic signal.
14. The signal processing apparatus of claim 13, wherein the amplifying module is further configured to amplify the filtered electrical signal in an earpiece mode to obtain the first electrical signal.
15. The signal processing apparatus of claim 14, wherein the amplifying module is further configured to amplify the filtered electrical signal in a speaker mode to obtain a second electrical signal; wherein a voltage value of the first electrical signal is smaller than a voltage value of the second electrical signal.
16. The signal processing apparatus according to any one of claims 13 to 15, wherein the filtering module is further configured to filter, from the electrical signal to be output, an electrical signal whose center frequency of the at least one frequency band is smaller than a preset frequency, so as to obtain the filtered electrical signal.
17. A signal processing apparatus, characterized in that the apparatus comprises at least: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is configured to execute the executable instructions, and the executable instructions perform the steps of the signal processing method provided in any one of the preceding claims 9 to 12.
18. A non-transitory computer-readable storage medium having stored therein computer-executable instructions that, when executed by a processor, implement the signal processing method provided in any one of claims 9 to 12.
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| US20230038144A1 (en) * | 2021-08-04 | 2023-02-09 | I-Shou University | Method and electronic device for configuring signal pads between three-dimensional stacked chips |
| US11748545B2 (en) * | 2021-08-04 | 2023-09-05 | I-Shou University | Method and electronic device for configuring signal pads between three-dimensional stacked chips |
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