CN111866673B - Screen sounding device, method, storage medium and electronic device - Google Patents
Screen sounding device, method, storage medium and electronic device Download PDFInfo
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- CN111866673B CN111866673B CN202010767138.XA CN202010767138A CN111866673B CN 111866673 B CN111866673 B CN 111866673B CN 202010767138 A CN202010767138 A CN 202010767138A CN 111866673 B CN111866673 B CN 111866673B
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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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
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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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
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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
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention relates to the technical field of electronic equipment, and particularly provides a screen sounding device, a screen sounding method, a storage medium and an electronic device. The device provided by the invention comprises a front panel, a middle frame and a rear cover, wherein the front panel is fixed above the middle frame, the rear cover is fixed below the middle frame, the middle frame comprises a frame and a middle plate, 2 front exciters are arranged between the front panel and the middle plate, the 2 front exciters are respectively fixed at the middle positions of the left side and the right side of the front panel, and 1 rear exciter is arranged between the rear cover and the middle plate. The frequency division combination of the front exciter and the rear exciter realizes wider frequency response and stereo function, and simultaneously avoids the tactile interference of the surface vibration of the terminal equipment to users through the structural optimization of the rear cover.
Description
Technical Field
The invention belongs to the technical field of electronic equipment, and particularly relates to a screen sounding device, a screen sounding method, a storage medium and an electronic device.
Background
The trend of current cell-phone development is that the screen accounts for more and more greatly, finally develops to the direction of full screen, and the positive earphone hole of screen is a problem of avoiding always keeping away to taking up of screen space, if can cancel the earphone hole completely, has great help to the promotion of screen accounts for.
The principle of screen sounding is that an exciter is installed at the back of a flat plate, the exciter pushes the flat plate to sound and vibrate to generate a sound signal, the source of the exciter includes but is not limited to an electromagnet driver, a linear motor, or a coil-magnet driving structure, when the exciter is installed at the back of a mobile phone panel (screen), the exciter is driven by an audio signal to drive the screen to vibrate and sound, and the functions of a receiver (low voltage) and a speaker (high voltage) can be realized by adjusting the voltage, but in the research process, it is found that there are many problems when a single exciter is used to drive the screen to sound, for example, patent CN209313876U provides a mobile terminal, which provides an exciter, specifically comprising a housing, a screen module, a circuit board and an exciter clamped between the circuit board and the screen module along the thickness direction of the mobile terminal, the exciter comprises a base, a coil fixed in the base and at least two spiral springs made of conducting materials, wherein the base extends towards the circuit board along the direction perpendicular to the circuit board, one end of each spiral spring is abutted against the circuit board and electrically connected with the circuit board, the other end of each spiral spring extends into the containing space and is electrically connected with the coil, and the spiral springs are in a compressed state when abutted against the circuit board and enable the base to be abutted against the screen module. Patent document CN108156562A provides a display screen sound-generating device and an intelligent terminal, where the display screen sound-generating device includes a casing, a display screen forming a surface of the casing, and an actuator disposed in the casing and located below the display screen; the exciter drives the display screen to vibrate and sound in the vertical direction of the display screen. The exciter is arranged on the middle plate and positioned between the rear cover and the middle plate; in both of the above two patent documents, a single exciter is used to drive the screen to generate sound, and there is a main problem that in the speaker mode, the screen resonance is strong due to a narrow frequency band (mainly because the rigidity of the screen is relatively high, so the low-frequency response is relatively poor), which affects the experience of the user when holding the screen in hand, and the stereo function cannot be realized.
The prior art also discloses a technical solution of multiple vibration sources to drive a screen to sound, for example, patent WO2019/191953a1 discloses a terminal device, which includes: the device comprises a screen assembly, at least one vibration source, a device middle frame, a circuit main board and a back cover; wherein the screen assembly is installed on the front surface of the equipment middle frame, the circuit main board is installed on the front surface of the equipment middle frame and is positioned between the screen assembly and the equipment middle frame, and the back cover is installed on the back surface of the equipment middle frame; the vibration source is installed the back of screen subassembly, the vibration source is used for driving the screen subassembly is in the perpendicular to the direction of screen subassembly is gone up vibration and sound production, but the screen sound generating mechanism in the above-mentioned patent all concentrates the setting behind one's back at the screen subassembly, and its vibration is strong, influences user experience, and its stereo efficiency effect is relatively poor, and the frequency response is narrower.
Disclosure of Invention
In order to solve the above problems, the present invention provides a screen sound generating apparatus, a method, a storage medium, and an electronic apparatus.
In a first aspect, the invention provides a screen sound production device, which comprises a front panel, a middle frame and a rear cover, wherein the front panel is fixed above the middle frame, and the rear cover is fixed below the middle frame.
Preferably, the front exciter and the rear exciter both comprise an upper assembly and a lower assembly, the upper assembly is a circular cover, the lower assembly is in a circular truncated cone structure, a circular groove is formed in the edge of the lower assembly, and the circular cover of the upper assembly is matched with the circular groove; the upper assembly of the front exciter is fixed on the front panel, the lower assembly of the front exciter is fixed on the middle plate, the upper assembly of the rear exciter is fixed on the middle plate, and the lower assembly of the rear exciter is fixed on the rear cover.
Preferably, the battery and the PCB are installed on the inner side of the rear cover and are adjacently arranged, wherein the PCB is of a U-shaped structure.
Preferably, the back lid inboard is provided with the installation department, the installation department is located the U type structure of PCB board, the peripheral ripple structure that encircles of installation department, ripple structure is a plurality of recess, a plurality of the recess back is planar structure.
Preferably, the back is covered and is provided with the installation department, the installation department is located the U type structure of PCB board, the peripheral ripple structure that encircles of installation department, the ripple structure is a plurality of bead structure, and wherein, the bead structure protrusion opposite direction of adjacent setting.
Preferably, the rear cover is a two-layer structure including an outer layer panel and an inner layer panel; the utility model discloses a PCB board, including inlayer panel, through-hole, rearmounted exciter, outer panel and inlayer panel veneer are connected, be close to intermediate position department on the inlayer panel and be provided with the through-hole, the through-hole is located the U type structure of PCB board, rearmounted exciter passes the through-hole and directly laminates on outer panel, outer panel and inlayer panel veneer are connected.
In a second aspect, the present invention provides a method of generating a screen sound, the method comprising
Acquiring an audio signal;
judging whether the audio signal is a single-channel signal or a left-channel/right-channel signal, if so, amplifying the single-channel signal and then sending the amplified signal to 1 pre-exciter to drive the pre-exciter to vibrate;
if the left channel signal and the right channel signal are the left channel signal and the right channel signal, the left channel signal and the right channel signal pass through a frequency divider, a high-frequency signal of the left channel signal and the right channel signal is amplified through a power amplifier and then output to 2 front exciters respectively, and a low-frequency signal separated from the left channel signal and the right channel signal is superposed through an audio mixer and then amplified through the power amplifier and output to 1 rear exciter.
Preferably, the divider divides the crossover frequency to 1500+/-300 Hz.
In a third aspect, the present invention provides a computer storage device, which is characterized by comprising computer instructions, when the computer instructions are run on a terminal device, the terminal device is caused to execute the above-mentioned screen sound production method.
In a fourth aspect, the invention provides an electronic device comprising the screen sounding device provided above.
Compared with the prior art, the invention has the beneficial effects that:
(1) the frequency division combination of the front exciter and the rear exciter realizes wider frequency response and stereo function, and simultaneously avoids the tactile interference of the surface vibration of the terminal equipment to users through the structural optimization of the rear cover.
(2) The corrugated structure provided by the invention can be annular or square folds, so that the vibration area near the rear exciter is easier to drive relative to other areas, and the low-frequency sensitivity is improved;
(3) according to the invention, through annular or square cutting, the vibration generated by the rear exciter is ensured to be limited in a small range, and the influence on the user experience caused by the vibration transmitted to the whole rear cover surface is prevented.
(4) The invention adopts a frequency division driving scheme of 2-3 exciters, high-frequency signals are driven by the front exciter of the front panel, high-frequency response is better, directivity is strong, and screen vibration sense is small, if two front exciters are used, a stereo effect can be even realized, low-frequency signals are driven by the rear exciter on the rear cover, low-frequency response is better, structural vibration can be limited in an area which can not be touched by hands in the center of the rear cover, and the problem caused by strong screen vibration sense due to a single exciter or the front exciter can be solved.
Drawings
FIG. 1 is an exploded view of a screen sound generator provided in accordance with the present invention;
fig. 2 is an overall structural view of the actuator;
FIG. 3 is an exploded view of the actuator;
FIG. 4a is a perspective view of a screen sound generator according to the present invention;
FIG. 4b is a side view of the screen sound generator provided by the present invention;
FIG. 4c is a cross-sectional view taken along A-A of FIG. 4 b;
FIG. 4d is another cross-sectional view taken along A-A of FIG. 4 b;
FIG. 4e is a cross-sectional view of FIG. 4b taken along C-C;
fig. 5 is an external perspective view of a rear cover provided in embodiment 1 of the present invention;
fig. 6 is an internal perspective view of a rear cover provided in embodiment 1 of the present invention;
fig. 7 is a view showing a structure of corrugations at the inner side of a rear cover according to embodiment 1 of the present invention;
fig. 8 is an external perspective view of a rear cover provided in embodiment 2 of the present invention;
fig. 9 is an internal perspective view of a rear cover provided in embodiment 2 of the present invention;
fig. 10 is a view showing a structure of corrugations of a rear cover according to embodiment 2 of the present invention;
fig. 11 is an external perspective view of a rear cover provided in embodiment 3 of the present invention;
fig. 12 is an internal perspective view of a rear cover provided in embodiment 3 of the present invention;
FIG. 13 is an enlarged view at B in FIG. 12;
fig. 14 is an operation principle of the screen sound emission device of embodiment 1 in the earpiece mode;
fig. 15 is an operation principle of the screen sound emission device of embodiment 1 in the speaker mode;
fig. 16 is a principle of operation of the screen sound emission device of embodiment 4 in the speaker mode;
fig. 17 is another operation principle of the screen sound emission device of embodiment 4 in the speaker mode;
FIG. 18 is a graph of the sensitivity of a human hand to vibration signals versus drive frequency provided by the present invention;
fig. 19 is a diagram illustrating an example of a frequency divider in a speaker mode of the screen sound generating apparatus according to the present invention;
fig. 20 is a comparison graph of frequency response curves of a single exciter and three exciters in a loudspeaker mode.
The reference numbers are as follows:
1. a front panel; 2. a middle plate; 3. a rear cover; 4. a frame; 5. a pre-exciter; 6. a rear exciter; 7. an installation part; 8. a PCB board; 9. a battery; 10, an upper component; 11. a lower assembly; 12, grooves; 13. a tool box; 14. a corrugated structure; 15. an outer panel; 16. an inner panel; 17. and a through hole.
Detailed Description
The invention is further illustrated by way of example in the following description with reference to the accompanying drawings:
as shown in fig. 1-3; the invention provides a screen sounding device of terminal equipment, which takes a mobile phone as an example and comprises a front panel 1, a middle frame and a rear cover 3, wherein the front panel 1 is fixed above the middle frame, the rear cover 3 is fixed below the middle frame, the middle frame comprises a middle plate 2 and a frame 4, the frame 4 is fixed on the periphery of the middle plate 2, and the front panel 1, the frame 4 and the middle plate 2 enclose a closed space; the rear cover 3, the frame 4 and the middle plate 2 enclose a closed space; at least 1 front exciter 5 is arranged between the front panel 1 and the middle plate 2, as a preferred embodiment, two front exciters 5 are arranged between the front panel 1 and the middle plate 2, the two front exciters 5 are respectively fixed at the middle positions of the front side and the rear side of the front panel 1, and the 2 front exciters 5 provided by the invention are spaced, so that the sound source distance is relatively far, and a relatively good stereo effect can be realized. And 1 rear exciter 6 is arranged between the rear cover 3 and the middle plate 2, wherein the rear exciter 6 is fixed on the rear cover 3, and the rear exciter 6 is positioned between the two front exciters 5.
As shown in fig. 4a-4e, wherein the front panel 1 of the present invention is used as a screen, specifically a glass screen; the battery 9 and the PCB8 are installed on the inner side of the rear cover 3, the battery 9 and the PCB8 are arranged adjacently, wherein the PCB8 provided by the invention can be in a U-shaped structure, a tool box 13 is further arranged on one side of the battery 9, which is far away from the PCB8, and components such as an antenna and the like are installed in the tool box 13.
As a preferred embodiment, the front panel and other components within 1-2cm of the front actuator position must have a gap of more than 0.1-0.3mm (the back cover must have a gap of more than 0.1-0.3mm to ensure the area within the edge/groove area and other components) the middle panel in this schematic is a complete straight panel that connects the top to the bottom of the handset, rigidly connected to the bezel, and in fact any similar functioning structure that is not rigidly or directly connected to the front and back panels.
The inner side of the rear cover 3 is provided with the mounting part 7, wherein the mounting part in the embodiment can be in a rectangular shape, a circular shape, an oval shape and the like, the periphery of the mounting part surrounds the corrugated structure 14 to form a closed structure, and the corrugated structure provided by the invention can be in an annular or square fold shape, so that the vibration area near the rear exciter is ensured to be easier to drive relative to other areas, and the low-frequency sensitivity is improved; or circular or square cut, ensures that the vibrations generated by the rear actuator are confined to a small range, preventing transmission to the entire rear cover 3 from affecting the user experience. Or the material surrounding the area of the rear exciter 6 is set as a reinforcing material, the reinforcing material of the invention is required to be a material with certain rigidity between 0.05 and 0.5mm in thickness and at least more than 1mm in width, the material comprises but is not limited to plastics, ceramics, metal and the like, and the reinforcing material can ensure the continuity of the rear cover material and ensure the waterproof effect.
As shown in fig. 2 to 3, the pre-exciter 5 and the post-exciter 6 provided by the invention each comprise an upper assembly 10 and a lower assembly 11, wherein the upper assembly 10 and the lower assembly 11 are connected; the upper assembly 10 is a round cover, the lower assembly 11 is of a circular truncated cone structure, a circular groove 12 is formed in the edge of the lower assembly, and the round cover of the upper assembly is matched with the circular groove 12.
The upper assembly 10 of the front exciter 5 is fixed on the front panel 1, the lower assembly 11 of the front exciter 5 is fixed on the middle plate 2, the upper assembly 10 of the rear exciter 6 is fixed on the middle plate 2, and the lower assembly 11 of the rear exciter 6 is fixed on the rear cover 3.
In practical application, a ring of acoustic damping material (such as sponge) can be added around the front and rear exciters to adjust the damping of panel vibration to improve sound quality;
explaining the sound production modes of the screen sound production device applied to the terminal equipment, specifically a receiver mode and a loudspeaker mode;
when the terminal equipment is in a receiver mode, the receiver mode can be realized only by switching on one front exciter, and the other front exciter and the rear exciter can not work;
when the terminal equipment is in a loudspeaker mode, at least one front exciter works, the rear exciter is guaranteed to work, high-frequency signals and low-frequency signals are separated through a frequency divider and are respectively provided for the front exciter and the rear exciter through a power amplifier. Even three actuators can be used to work simultaneously to achieve the stereo effect.
Specifically, when the screen sound generating device is in the earpiece mode, taking a mobile phone as an example, as shown in fig. 14, fig. 14 is an operating mode (only using a single channel during communication) in the earpiece mode carrying multiple exciters, the earpiece mode can be realized only by turning on one front exciter, and the other front exciter and the rear exciter can not work; specifically, a mobile phone processor outputs a single-track signal to an audio processing chip, and the signal in the chip is amplified and then directly drives a pre-exciter;
when the screen sound production device is in the speaker mode, taking a mobile phone as an example, as shown in fig. 15, fig. 15 is a working mode (stereo effect) of a mobile phone carrying three exciters, namely, a front exciter and a rear exciter, in the speaker mode, wherein a mobile phone processor outputs stereo audio signals (signals of left/right channels) to an audio processing chip, after the signals of the left/right channels pass through a frequency divider, high-frequency signals are amplified by a power amplifier and then output to a front exciter, after the signals of the other channel pass through the frequency divider, high-frequency signals are amplified by the power amplifier and then output to the other front exciter, and low-frequency signals separated from the two channels are superposed by a sound mixer and then amplified by the power amplifier and output to the rear exciter.
As shown in fig. 16, in the working mode (stereo effect i) of the mobile phone with the front and rear two exciters in the speaker mode, the mobile phone processor outputs stereo audio signals to the audio processing chip, the signals of the left/right channels pass through the frequency divider, the high frequency signal is amplified by the power amplifier and then output to one of the front exciters, and the low frequency signal and the full band signal of the other channel are superimposed by the audio mixer and then amplified by the power amplifier and output to the rear exciter.
As shown in fig. 17, fig. 17 shows a working mode (stereo effect ii) of a mobile phone with two front and rear exciters in a speaker mode, where a processor of the mobile phone outputs stereo audio signals to an audio processing chip, signals of two channels are respectively divided by a frequency divider, high-frequency signals of the two channels are overlapped by an audio mixer, amplified by a power amplifier, and output to a front exciter, and low-frequency signals of the two channels are overlapped by the audio mixer, amplified by the power amplifier, and output to a rear exciter.
The simultaneous driving of the front and rear drivers in speaker mode is determined by two reasons: 1. the response frequency band of a single exciter is limited, the frequency band required by normal human ears is 200-10kHz, the single exciter cannot realize broadband output, the main component of the front panel of the terminal equipment is screen glass, the overall rigidity of the front panel is high, f0 is also high, therefore, the low-frequency response of the front exciter mounted on the front panel is poor, the overall rigidity of the rear cover (particularly the folding ring design matched with the rear cover structure) is low, f0 is low, and therefore, the high-frequency response of the rear exciter mounted on the rear cover is poor; therefore, multiple exciters covering different frequency bands must be designed to implement; 2. if the amplitude of the low-frequency part (200-.
The frequency division driving scheme of 2-3 exciters is adopted, high-frequency signals are driven by the front exciter of the front panel, high-frequency response is good, directivity is strong, screen vibration sense is small, if two front exciters are used, a stereo effect can even be achieved, low-frequency signals are driven by the rear exciter on the rear cover, low-frequency response is good, structural vibration can be limited in an area which cannot be touched by hands in the center of the rear cover, and the problem caused by a single exciter can be solved.
As shown in fig. 18, fig. 18 is a relationship of the sensitivity of the human hand to vibration signals and the driving frequency; FIG. 6 is a graph of the sensitivity of a human hand to vibration signals measured with a single pre-exciter in a fixed voltage sweep mode, where the human hand has little to no screen vibration when the drive frequency exceeds 1500Hz, and based on this experimental data it is desirable to select the crossover frequency of the frequency divider at 1500Hz, as shown in FIG. 19, FIG. 19 is an example of a loudspeaker mode frequency divider; the crossover frequency of the high frequency and the low frequency of the frequency divider under the loudspeaker mode of the terminal equipment is 1500Hz, and the crossover point can fluctuate within the range of 1500+/-300Hz during actual design; as shown in fig. 20, fig. 20 is a comparison of the frequency response curves of a single exciter in the loudspeaker mode and the frequency response curves of the three-exciter crossover mode, and thus it can be seen that the low-frequency and high-frequency responses of the three-exciter (two front exciters and 1 rear exciter) mode are enhanced relative to the single front exciter, and the frequency response curve of the whole system is relatively flat.
Example 1:
as shown in fig. 1-3 and 4a-4c, the present embodiment provides a screen sound-generating device applied to a mobile phone, which includes a front panel 1, a middle frame and a rear cover 3, where the front panel 1 is fixed above the middle frame, the rear cover 3 is fixed below the middle frame, the middle frame includes a middle plate 2 and a frame 4, a frame is fixed on the periphery of the middle plate, and a closed space is defined by the front panel, the frame and the middle plate; the rear cover, the frame and the middle plate form a closed space; two front exciters 5 are arranged between the front panel and the middle plate, the two front exciters 5 are respectively fixed at the middle positions of the front side and the rear side of the front panel 1, 1 rear exciter 6 is arranged between the rear cover and the middle plate, and the rear exciter 6 is fixed on the rear cover 3.
The front panel 1 of the invention is used as a screen, in particular a glass screen; battery 9 and PCB board 8 are installed to the back lid inboard, battery 9 and the adjacent setting of PCB board 8, wherein PCB board 8 is U type structure, one side that PCB board 8 was kept away from to battery 9 still is provided with tool holder 13, parts such as antenna are equipped with in the tool holder 13.
As shown in fig. 5-7, the inner side of the rear cover 3 is provided with an installation portion 7, wherein the installation portion 7 in this embodiment is a square structure, the periphery of the installation portion surrounds a corrugated structure 14, the corrugated structure is three grooves which are continuously arranged, the concave directions of the three grooves are the same, and the back surface of the corrugated structure is a planar structure. A rear exciter 6 is mounted in the mounting portion 7.
The front exciter and the rear exciter respectively comprise an upper assembly 10 and a lower assembly 11, and the upper assembly 10 is connected with the lower assembly 11; the upper assembly 10 is a round cover, the lower assembly is of a circular truncated cone structure, a circular groove is formed in the edge of the lower assembly 11, and the round cover of the upper assembly is matched with the circular groove 12.
The upper assembly 10 of the front exciter is fixed on the front panel 1, the lower assembly 11 of the front exciter 5 is fixed on the middle plate 2, the upper assembly 10 of the rear exciter 6 is fixed on the middle plate 2, and the lower assembly 11 of the rear exciter 6 is fixed on the rear cover 3.
As shown in fig. 14, a screen sound emission method in an earpiece mode includes: the mobile phone processor outputs a single-channel signal to the audio processing chip, and the single-channel signal in the audio processing chip is amplified and then sent to one of the pre-exciters to drive the pre-exciters to vibrate.
As shown in fig. 15, a screen sound emission method in a speaker mode includes: the mobile phone processor outputs left/right channel signals to the audio processing chip, the left channel signals pass through the frequency divider, high-frequency signals of the left channel are amplified through the power amplifier and then output to one of the front exciters, high-frequency signals of the right channel pass through the frequency divider, the high-frequency signals are amplified through the power amplifier and then output to the other front exciter, and low-frequency signals split from the left/right channel signals are overlapped through the sound mixer and then output to the rear exciter through the power amplifier and amplification.
Example 2:
as shown in fig. 8-10, this embodiment is different from embodiment 1 to the mounting portion 7 with the rear cover, and the rest is the same, the mounting portion is on the rear cover, wherein the mounting portion in this embodiment is a square structure, the periphery of the mounting portion 7 surrounds the corrugated structure 14, the corrugated structure 14 is a continuously arranged rib structure, and the protruding directions of the adjacent rib structures are opposite.
Example 3:
as shown in fig. 11-13, the back cover of the present embodiment is different from the back cover of embodiment 1, wherein the back cover of the present embodiment has a two-layer structure, specifically including an outer-layer panel 15 and an inner-layer panel 16; the effect of outer panel 15 as the rearmounted panel of cell-phone, there is not the trompil at the outer panel 15 of the position department that the rearmounted exciter 6 of installation corresponds, outer panel 15 is the same with interior panel 16 size, just be provided with through-hole 17 near intermediate position department on the inner panel 16, through-hole 17 is the rectangle, rearmounted exciter 6 passes through-hole 17 and directly laminates on outer panel 15, and the effect of this kind of structure can make the vibration range confine the regional in through-hole 17, outer panel 15 and interior panel 16 veneer connection.
Example 4:
the embodiment provides a screen sounding device applied to a mobile phone, which comprises a front panel, a middle frame and a rear cover, wherein the front panel is fixed above the middle frame, the rear cover is fixed below the middle frame, the middle frame comprises a middle plate and a side frame, the periphery of the middle plate is fixed with the side frame, and the front panel, the side frame and the middle plate form a closed space; the rear cover, the frame and the middle plate form a closed space; 1 front exciter is arranged between the front panel and the middle plate, wherein the front exciter is fixed at the middle position of the front side of the front panel, and 1 rear exciter is arranged between the rear cover and the middle plate, wherein the rear exciter is fixed at the middle position close to the rear cover;
the front panel is used as a screen, and particularly is a glass screen; the battery and the PCB are installed on the inner side of the rear cover and are arranged adjacently, the PCB is of a U-shaped structure, a tool box is further arranged on one side, far away from the PCB, of the battery, and components such as an antenna are arranged in the tool box.
An installation part is arranged on the inner side of the rear cover, wherein the installation part in the embodiment is of a square structure, a corrugated structure is surrounded on the periphery of the installation part, the corrugated structure is three grooves which are continuously arranged, the concave directions of the three grooves are the same, and the back surface of the corrugated structure is of a plane structure; and a rear exciter is arranged in the mounting part.
The front exciter and the rear exciter both comprise an upper assembly and a lower assembly, and the upper assembly is connected with the lower assembly; the upper assembly is a round cover, the lower assembly is of a round table structure, a round groove is formed in the edge of the lower assembly, and the round cover of the upper assembly is matched with the round groove.
The upper assembly of the front exciter is fixed on the front panel, the lower assembly of the front exciter is fixed on the middle plate, the upper assembly of the rear exciter is fixed on the middle plate, and the lower assembly of the rear exciter is fixed on the rear cover.
A method of screen sounding in earpiece mode, comprising: the mobile phone processor outputs a single-channel signal to the audio processing chip, and the single-channel signal in the audio processing chip is amplified and then sent to one of the pre-exciters to drive the pre-exciters to vibrate.
As shown in fig. 16, a screen sound emission method in a speaker mode includes: the mobile phone processor outputs left/right channel signals to the audio processing chip, the left/right channel signals pass through the frequency divider, the high-frequency signals of the right channel are amplified through the power amplifier and then output to the front exciter, and the low-frequency signals and the full-frequency band signals of the left channel are overlapped through the audio mixer and then output to the rear exciter through the power amplifier and amplification.
As shown in fig. 17, a screen sound emission method in a speaker mode includes: the mobile phone processor outputs left/right sound channel signals to the audio processing chip, after the left/right sound channel signals are subjected to frequency division through the frequency divider, high-frequency signals of the left/right sound channel are amplified through the power amplifier and then output to the front exciter, and low-frequency signals of the left/right sound channel are superposed through the sound mixer, amplified through the power amplifier and then output to the rear exciter.
The above description is only an example of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A screen sounding device comprises a front panel, a middle frame and a rear cover, wherein the front panel is fixed above the middle frame, the rear cover is fixed below the middle frame, the middle frame comprises a frame and a middle plate, the middle plate is fixed in the frame, the front panel and the rear cover are both fixed on the frame, and the middle plate is positioned between the front panel and the rear cover; the device is characterized in that 2 front exciters are arranged between the front panel and the middle plate, the 2 front exciters are respectively fixed on the front panel and have equal distance from two long sides of the front panel, 1 rear exciter is arranged between the rear cover and the middle plate, the rear exciters are fixed on the rear cover, and the distance from the rear exciter to the two long sides of the rear cover is equal;
the battery and the PCB are arranged adjacently, wherein the PCB is of a U-shaped structure;
the inner side of the rear cover is provided with an installation part, the installation part is positioned in a U-shaped structure of the PCB, the periphery of the installation part is surrounded with a corrugated structure, so that a closed structure is formed, the corrugated structure is a plurality of grooves, and the back surfaces of the grooves are of a planar structure;
the rear exciter is positioned between the two front exciters and is fixed on the mounting part of the rear cover;
the front panel, the frame and the middle panel enclose a closed space; the rear cover, the frame and the middle plate form a closed space.
2. The screen sound generator of claim 1, wherein the front and rear exciters each comprise an upper assembly and a lower assembly, the upper assembly is a dome, the lower assembly is a truncated cone structure, a circular groove is formed in the edge of the lower assembly, and the dome of the upper assembly fits the circular groove; the upper assembly of the front exciter is fixed on the front panel, the lower assembly of the front exciter is fixed on the middle plate, the upper assembly of the rear exciter is fixed on the middle plate, and the lower assembly of the rear exciter is fixed on the rear cover.
3. A method of screen sound production using a screen sound production device as claimed in any one of claims 1 to 2, the method comprising
Acquiring an audio signal;
judging whether the audio signal is a single-channel signal or a left-channel/right-channel signal, if so, amplifying the single-channel signal and then sending the amplified signal to 1 pre-exciter to drive the pre-exciter to vibrate;
if the left channel signal and the right channel signal are the left channel signal and the right channel signal, the left channel signal and the right channel signal pass through a frequency divider, a high-frequency signal of the left channel signal and the right channel signal is amplified through a power amplifier and then output to 2 front exciters respectively to drive the front exciters to vibrate, and a low-frequency signal separated from the left channel signal and the right channel signal is superposed through an audio mixer and then amplified through the power amplifier and output to 1 rear exciters to drive the rear exciters to vibrate.
4. A screen sound production method as claimed in claim 3, wherein the divider divides the crossover frequency to be 1500+/-300 Hz.
5. Computer storage means, comprising computer instructions which, when run on a terminal device, cause the terminal device to perform the screen sound emission method of any of claims 3-4.
6. An electronic device comprising the screen sound emitting apparatus of any one of claims 1-2.
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| CN202010767138.XA CN111866673B (en) | 2020-08-03 | 2020-08-03 | Screen sounding device, method, storage medium and electronic device |
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| CN115412817A (en) * | 2022-08-15 | 2022-11-29 | Oppo广东移动通信有限公司 | Electronic device, control method, and computer-readable storage medium |
| CN115580811A (en) * | 2022-09-30 | 2023-01-06 | 镇江贝斯特新材料股份有限公司 | Low-resonance structure and electronic device |
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