Display device, sound control method, parameter determination method and device

Abstract

The present disclosure provides a display device, a sound control method, a parameter determination method and a device. The display device includes: a plurality of exciters arranged on the display panel, through which the display panel can make a sound on the screen; wherein the plurality of exciters form at least one sound unit, each of the sound units includes at least two exciters, each exciter in the same sound unit is connected to the same audio signal input terminal, and in one of the sound units, a signal filter is arranged on the audio transmission line from the audio signal input terminal to at least one of the exciters, for low-frequency compensation of the sound emitted by the entire sound unit.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device, a sound control method, and a parameter determination method and device. Background Art

[0002] The display device can realize the unity of sound and picture by directly emitting sound through the screen, and can effectively utilize space and save resources. In addition, when combined with a large-size screen, it can further increase the sound power and achieve different sound field effects.

[0003] The screen sound technology requires the exciter to be attached to the back of the display screen. The display screen replaces the diaphragm in the speaker. The exciter vibrates, driving the screen to vibrate, pushing the airflow to produce sound. Usually, in order to achieve the unity of sound and picture, an exciter is attached to each sub-screen of the spliced ​​display screen to form an on-screen speaker array structure, and the speaker array is used to achieve the effect of sound source positioning or directional sound.

[0004] However, the sound-generating device using this structure has the problem of poor low-frequency performance of the full-range exciter, and cannot ensure the uniformity and good flatness of the frequency spectrum of the speaker of the sound-generating device. Summary of the invention

[0005] The purpose of the technical solution disclosed in the present invention is to provide a display device, a sound control method, a parameter determination method and a device, which are used to solve the problems in the prior art screen sound technology, that is, the low-frequency performance is poor and the uniformity and good flatness of the spectrum cannot be guaranteed.

[0006] In order to solve the above technical problems, the present disclosure provides a display device, including a display panel, wherein the display device further includes:

[0007] A plurality of actuators are arranged on the display panel, through which the display panel can generate screen sound;

[0008] Among them, multiple exciters form at least one sound-emitting unit, each of the sound-emitting unit includes at least two exciters, each exciter in the same sound-emitting unit is connected to the same audio signal input terminal, and in one of the sound-emitting units, a signal filter is provided on the audio transmission line from the audio signal input terminal to at least one of the exciters, which is used for low-frequency compensation of the sound emitted by the entire sound-emitting unit.

[0009] Optionally, in the display device, the plurality of exciters are formed into at least two sound-emitting units, and the exciters in different sound-emitting units are connected to different audio signal input terminals.

[0010] Optionally, in the display device, in the same sound-generating unit, a signal filter is not provided on the audio transmission line from the first exciter of at least two exciters to the audio signal input terminal, and the audio signal of the audio signal input terminal is directly transmitted to the first exciter, and the first exciter vibrates to generate sound;

[0011] A low-pass filter is provided on the audio transmission line from each second exciter except the first exciter among at least two exciters to the audio signal input end. The audio signal of the audio signal input end passes through the low-pass filter, and the low-frequency signal of the audio signal is obtained and then transmitted to the second exciter, which vibrates and produces sound.

[0012] Optionally, in the display device, in the same sound-generating unit, a low-pass filter is provided on the audio transmission line from the first exciter of at least two exciters to the audio signal input terminal, and the audio signal of the audio signal input terminal passes through the low-pass filter, and the low-frequency signal of the audio signal is obtained and then transmitted to the first exciter, and the first exciter vibrates and generates sound;

[0013] A low-pass filter is provided on the first audio transmission line from a second exciter other than the first exciter among at least two exciters to the audio signal input end, and a high-pass filter is provided on the second audio line from the second exciter to the audio signal input end. The audio signal at the audio signal input end is respectively passed through the low-pass filter to obtain a low-frequency signal and through the high-pass filter to obtain a high-frequency signal, and the low-frequency signal and the high-frequency signal are transmitted to the second exciter after signal superposition, and the second exciter vibrates and produces sound.

[0014] Optionally, in the display device, in the same sound-emitting unit, a low-pass filter and a high-pass filter are provided on the audio transmission line from the audio signal input end to each exciter, and the audio signal at the audio signal input end is respectively passed through the low-pass filter to obtain a low-frequency signal and passed through the high-pass filter to obtain a high-frequency signal, and the low-frequency signal and the high-frequency signal are transmitted to each of the exciters after signal superposition and normalization processing, and each of the exciters vibrates and produces sound.

[0015] Optionally, in the display device, the number of the first exciters is at least two, and the audio transmission line from the audio signal input end to each of the first exciters shares a low-pass filter.

[0016] Optionally, in the display device, the display panel includes a plurality of sub-panels spliced ​​in sequence, each sub-panel is provided with an exciter, and the exciters provided on a plurality of adjacent sub-panels form a sound-emitting unit.

[0017] Optionally, in the display device, the display panel includes a plurality of display areas, wherein each display area is respectively provided with a plurality of the exciters in an array, and the plurality of the exciters provided on each display area form a sound-emitting unit.

[0018] The present disclosure also provides a screen sound-generating device, which includes:

[0019] A plurality of sound-emitting units arranged in an array, each of the sound-emitting units comprising at least two exciters;

[0020] A circuit board is provided with a plurality of audio input terminals, wherein each audio input terminal corresponds to a sound-emitting unit, and the audio input terminal is connected to each exciter corresponding to the sound-emitting unit through an audio transmission line; wherein, in each sound-emitting unit, a signal filter is provided on the audio transmission line from the audio input terminal to at least one of the exciters.

[0021] Optionally, in the screen sound-emitting device, each of the sound-emitting units further includes a plurality of display units arranged in an array, and each of the display units is respectively provided with an exciter.

[0022] Optionally, in the screen sound-emitting device, the display units of a plurality of the sound-emitting units form a display panel, or one of the display units forms a display sub-panel, and adjacent display sub-panels are spliced ​​together.

[0023] Optionally, in the screen sound-generating device, in the same sound-generating unit, a signal filter is not provided on the audio transmission line from the first exciter of at least two exciters to the audio signal input terminal;

[0024] A low-pass filter is provided on the audio transmission line from each second exciter of the at least two exciters except the first exciter to the audio signal input terminal.

[0025] Optionally, in the screen sound-generating device, a low-pass filter is provided on the audio transmission line from the first exciter of at least two exciters in the same sound-generating unit to the audio signal input terminal;

[0026] A low-pass filter is provided on a first audio transmission line from a second exciter other than the first exciter among at least two exciters to the audio signal input terminal; a high-pass filter is provided on a second audio transmission line from the second exciter to the audio signal input terminal.

[0027] Optionally, in the screen sound-emitting device, in the same sound-emitting unit, a low-pass filter and a high-pass filter are sequentially arranged on the audio transmission line from the audio signal input end to each exciter.

[0028] Optionally, the screen sound emitting device further comprises a processor for inputting audio signals to each of the audio input terminals respectively.

[0029] The present disclosure also provides a method for controlling sound emission, which is applied to the display device as described in any one of the above items, and the method includes:

[0030] Acquire image information to be output and each audio signal corresponding to the image information;

[0031] Determining, according to the image information, a sound emitting unit when each of the audio signals is output;

[0032] Each of the audio signals is input to the audio signal input end of the corresponding sound-generating unit, so that each exciter in the sound-generating unit connected to the audio signal input end vibrates and generates sound in response to the same audio signal.

[0033] Optionally, the sound control method, wherein determining, according to the image information, a sound emission unit when each of the audio signals is output, comprises:

[0034] identifying a sound-making object corresponding to the audio signal in the image information;

[0035] determining a display position of the sound-emitting object in the image information on the display panel when the display panel displays the image information;

[0036] A sound generating unit disposed at the display position is determined for sound output of the audio signal.

[0037] The present disclosure also provides a method for determining signal filtering parameters, which is applied to the display device as described in any one of the above items, and the method includes:

[0038] Read the measured spectrum data;

[0039] According to the measured spectrum data, the filtering parameters of the signal filter on the audio transmission line from the audio signal input terminal to each of the exciters in each of the sound-emitting units are debugged to obtain the set filtering parameters corresponding to each of the signal filters, so that through the set filtering parameters, each exciter connected to the audio signal input terminal in the sound-emitting unit has low-frequency compensation when it vibrates and makes sound in response to the same audio signal.

[0040] Optionally, the signal filtering parameter determination method, wherein, in the same sound-emitting unit, no signal filter is provided on the audio transmission line from the first exciter to the audio signal input terminal, and a low-pass filter is provided on the audio transmission line from each second exciter other than the first exciter to the audio signal input terminal of at least two exciters, then, based on the measured spectrum data, the filtering parameters of the signal filter provided on the audio transmission line from the audio signal input terminal to each exciter in each of the sound-emitting units are debugged to obtain the set filtering parameters corresponding to each of the signal filters, including:

[0041] When the filtering parameters of the low-pass filter corresponding to each of the second exciters are set to be initial filtering parameters, a first spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data, a second spectrum curve when each of the exciters outputs the full audio signal of the measured spectrum data, and a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output low-frequency signals of the measured spectrum data are obtained; wherein N is the number of the second exciters;

[0042] According to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filter parameters are adjusted to obtain the set filter parameters of the low-pass filter corresponding to each of the second exciters.

[0043] Optionally, the signal filtering parameter determination method, wherein obtaining a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output low-frequency signals of the measured spectrum data, comprises:

[0044] Calculate the zero-state responses of N second exciters according to the initial filter parameters of the low-pass filter corresponding to each second exciter;

[0045] The zero-state responses of the N second exciters are superimposed on the spectrum curve of the measured spectrum data to generate the third spectrum curve.

[0046] Optionally, in the signal filtering parameter determination method, the initial filtering parameters include filter type, order and cutoff frequency;

[0047] Wherein, adjusting the filtering parameters comprises:

[0048] The cutoff frequency of each of the low-pass filters is adjusted.

[0049] Optionally, the signal filtering parameter determination method, wherein, according to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filtering parameters are adjusted to obtain the set filtering parameters of the low-pass filter corresponding to each second exciter, comprises:

[0050] comparing the first spectrum curve, the second spectrum curve and the third spectrum curve;

[0051] When the first spectrum curve, the second spectrum curve and the third spectrum curve do not meet a preset condition, adjusting the filtering parameters to re-obtain the first spectrum curve, the second spectrum curve and the third spectrum curve;

[0052] When the first spectrum curve, the second spectrum curve and the third spectrum curve meet preset conditions, set filtering parameters of the low-pass filter corresponding to each of the second exciters are obtained.

[0053] Optionally, in the signal filtering parameter determination method, the preset condition is:

[0054] The distance between the third spectrum curve and the first spectrum curve at the low frequency part is less than a first preset value, the distance between the third spectrum curve and the second spectrum curve at the high frequency part is less than a second preset value, and the transition line segment between the low frequency part and the high frequency part is a smooth line segment.

[0055] The present disclosure also provides a sound control device, which is applied to the display device as described in any one of the above items, and includes:

[0056] A signal acquisition module, used to acquire a display image to be output and each audio signal corresponding to the display image;

[0057] An analysis module, used for determining, according to the displayed image, a sound emitting unit when each of the audio signals is output;

[0058] The signal transmission module is used to input each of the audio signals to the audio signal input end of the corresponding sound-emitting unit, so that each exciter in the sound-emitting unit connected to the audio signal input end vibrates and emits sound in response to the same audio signal.

[0059] The present disclosure also provides a signal filtering parameter determination device, which is applied to the display device as described in any one of the above items, and includes:

[0060] A signal reading module is used to read the measured spectrum data;

[0061] A data debugging module is used to debug the filtering parameters of the signal filter on the audio transmission line from the audio signal input terminal to each of the exciters in each of the sound-emitting units according to the measured spectrum data, and obtain the set filtering parameters corresponding to each of the signal filters, so that through the set filtering parameters, when each exciter connected to the audio signal input terminal in the sound-emitting unit vibrates and sounds in response to the same audio signal, the sound emitted by the entire sound-emitting unit has low-frequency compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0063] Figure 1 A schematic diagram of a planar structure of one implementation of the display device described in the embodiment of the present disclosure;

[0064] Figure 2 A schematic diagram of a planar structure of another implementation of the display device described in the embodiment of the present disclosure;

[0065] Figure 3 Schematic diagram of the structure of implementation mode 1 of the sound-emitting unit in the embodiment of the present disclosure;

[0066] Figure 4 This is a schematic diagram of a process for testing and determining filtering parameters of a low-pass filter in an embodiment of the present disclosure;

[0067] Figure 5 One of the schematic diagrams of a frequency spectrum curve generated by the display device according to the embodiment of the present disclosure;

[0068] Figure 6 This is a structural diagram of implementation mode 2 of the sound-emitting unit in the embodiment of the present disclosure;

[0069] Figure 7 This is a structural diagram of implementation mode 3 of the sound-emitting unit in the embodiment of the present disclosure;

[0070] Figure 8 The second schematic diagram is a spectrum curve generated by the display device according to the embodiment of the present disclosure;

[0071] Fig. 9 A flowchart of the sound control method according to an embodiment of the present disclosure;

[0072] Fig.10 It is a structural schematic diagram of the sound control device according to an embodiment of the present disclosure;

[0073] Fig.11 A schematic diagram of a flow chart of a method for determining signal filtering parameters according to an embodiment of the present disclosure;

[0074] Fig.12 It is a structural schematic diagram of the signal filtering parameter determination device according to an embodiment of the present disclosure;

[0075] Fig.13 It is a schematic diagram of the three-dimensional structure of the screen sound-emitting device described in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0077] In order to make the technical problems, technical solutions and advantages to be solved by the present disclosure more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0078] In order to solve the problem that the prior art screen sound technology has poor low-frequency performance and cannot ensure the uniformity and good flatness of the spectrum, the embodiment of the present disclosure provides a display device, which is composed of at least two exciters to form a sound unit, and in the sound unit, a signal filter is provided on the audio transmission line of at least one exciter. In this way, when at least two exciters in the sound unit vibrate and sound at the same time, the sound generated by the vibration of the exciter with the signal filter is used to perform low-frequency compensation for the sound emitted by the entire sound unit, thereby ensuring the good flatness and uniformity of the overall spectrum of the sound emitted by the display device using the screen sound technology.

[0079] like Figure 1 This is a schematic diagram of the structure of one embodiment of the display device described in the embodiment of the present disclosure. A plurality of exciters 110 are arranged in an array on the display panel 100. The vibration of at least one exciter 110 can drive the display panel 100 to vibrate. The display panel 100, as a vibrating body, generates vibration waves, which are transmitted to the human ear to achieve screen sound. In this way, the display device does not need a speaker or an earpiece. With the exciter 110 and the display panel 100 as vibrating bodies, sound output can be achieved, and the screen sound of the display panel can be achieved.

[0080] When the above-mentioned display device is used to realize screen sound, the output audio signal is usually converted into an electrical signal and output to at least one actuator 110 on the display panel 100, so that the actuator 110 generates vibrations of corresponding amplitudes, wherein the vibration amplitude of the actuator 110 is different according to the different audio values ​​of the emitted audio signal. In the display panel of the conventional technology, each actuator 110 can realize the vibration sound of each audio value of the full-frequency signal, and the audio signal to be played is usually transmitted to one actuator 110, and the vibration of the one actuator 110 drives the display panel 100 to vibrate and sound. However, when the full-frequency sound of the emitted audio signal is realized by using one actuator 110, the low-frequency performance of the full-frequency actuator is poor, and the uniformity and good flatness of the emitted sound spectrum cannot be guaranteed.

[0081] The display device described in the embodiments of the present disclosure, in one embodiment, Figure 1 As shown, the multiple exciters 110 arranged on the display panel 100 form at least one sound unit 120, and each sound unit 120 includes at least two exciters 110, wherein each exciter 110 in the same sound unit 120 is connected to the same audio signal input terminal (not shown in the figure) for vibrating and making sound in response to the same audio signal input by the audio signal input terminal.

[0082] The display device described in the embodiment of the present disclosure, in one implementation manner, Figure 1 As shown, optionally, the display panel 100 includes a plurality of sub-panels 101 spliced ​​in sequence, and each sub-panel 101 is respectively provided with an exciter 110, wherein the plurality of exciters 110 provided on the plurality of adjacent sub-panels 101 form a sound unit 120, that is, the plurality of exciters 110 provided on the plurality of adjacent sub-panels 101 are all connected to the same audio signal input terminal, and are used for vibrating and making sound in response to the same audio signal inputted by the audio signal input terminal.

[0083] In this implementation, optionally, the display panel formed by splicing a plurality of sub-panels may be, but is not limited to, only a Min LED display panel.

[0084] The display device described in the embodiment of the present disclosure, in one implementation manner, Figure 2 As shown, optionally, the display panel 100 can be an integral panel, which includes a plurality of display areas 102, each of which is respectively provided with a plurality of exciters 110 in an array, and the plurality of exciters 110 provided on each display area 102 form a sound unit 120, that is, the plurality of exciters 110 provided on each display area 102 are all connected to the same audio signal input terminal, and are used for vibrating and making sound in response to the same audio signal input by the audio signal input terminal.

[0085] In this embodiment, optionally, the display panel 100 formed as an integral panel may be, but is not limited to, only a Min LED display panel.

[0086] According to the above embodiment, among the multiple exciters 110 arranged on the display panel 100 of the display device, the multiple exciters 110 are formed into at least one sound unit 120, each sound unit 120 includes at least two exciters 110, each exciter 110 in the same sound unit 120 is connected to the same audio signal input terminal, and optionally, the exciters 110 in different sound units 120 are connected to different audio signal input terminals.

[0087] By using the display device described in the embodiment of the present disclosure, when an audio signal is input into the display device so that the exciter vibrates and makes a sound, each audio signal that should be played is determined based on the display image currently output on the display device, wherein the sounds emitted by different sound sources may correspond to different audio signals. For each audio signal, the corresponding sound-emitting unit that needs to play the audio signal is determined, and the same audio signal is input into each exciter in the sound-emitting unit so that multiple exciters in the same sound-emitting unit respond to the audio signal and make a sound at the same time.

[0088] Optionally, by identifying the sound-emitting object corresponding to the audio signal in the image information, it is possible to determine the display position of the sound-emitting object in the image information on the display panel when the display panel displays the image information, and determine the sound-emitting unit arranged at the display position for sound output of the audio signal. That is, by locating the sound-emitting object in the image information displayed by the display device, the sound-emitting unit at the position where the corresponding sound-emitting object is located outputs the sound emitted by the sound-emitting object, thereby achieving the effect of integration of sound and picture.

[0089] In the display device described in the embodiment of the present disclosure, in one of the sound-emitting units, a signal filter is provided on the audio transmission line from the audio signal input end to at least one exciter, which is used for low-frequency compensation of the sound emitted by the entire sound-emitting unit, thereby ensuring good flatness and uniformity of the overall frequency spectrum of the sound emitted by the display device using screen sound-emitting technology.

[0090] One implementation method, such as Figure 3 As shown, in the same sound-generating unit 120, no signal filter is provided on the audio transmission line from the first exciter 1101 of at least two exciters 110 to the audio signal input terminal, and the audio signal of the audio signal input terminal is directly transmitted to the first exciter 1101, and the first exciter 1101 vibrates to generate sound;

[0091] A low-pass filter (LPF) is provided on the audio transmission line from the second exciter 1102 of at least two exciters 110 except the first exciter 1101 to the audio signal input end. The audio signal of the audio signal input end passes through the low-pass filter, and the low-frequency signal of the audio signal input end is obtained and then transmitted to the second exciter 1102, which vibrates and produces sound.

[0092] Optionally, the number of the first exciter 1101 is one, and the second exciter 1102 includes each exciter other than the first exciter 1101 in the sound-emitting unit 120 .

[0093] In this implementation, the low-frequency signal of the output audio signal is extracted by a low-pass filter LPF connected to the second exciter 1102, the full-frequency sound signal of the output audio signal is vibrated and sounded by the first exciter, and the low-frequency signal of the output audio signal is vibrated and sounded by at least two second exciters at the same time, thereby ensuring the uniformity and good flatness of the emitted sound spectrum.

[0094] It should be noted that, in the embodiment of the present disclosure, optionally, the number of the first exciter is one, and the audio signal output to the first exciter is the sound signal to be output, that is, a full-frequency sound signal including any audio value.

[0095] Specifically, according to the following formula principle for improving the sound pressure level:

[0096]

[0097] Where N is the number of drivers, ΔSPL is the improvement in sound pressure level relative to a single driver, f is the audio value, and f0 is the dividing point between low frequency and high frequency.

[0098] It can be seen that when the number of exciters is at least two and the audio value f is in the low-frequency range, the sound pressure level is improved by 20lg(N) relative to that of a single exciter. The simultaneous sounding of multiple exciters can significantly increase the low-frequency sound pressure level so that it can be uniform with the sounding of high-frequency signals.

[0099] Based on this principle, in the sound control method described in the embodiment of the present disclosure, a low-frequency signal of the audio signal is output by at least two second exciters 1102, and the spectrum of the sound emitted by each second exciter 1102 is superimposed on the spectrum of the sound emitted by the first exciter 1101 to achieve low-frequency compensation, thereby ensuring good flatness and uniformity of the sound spectrum emitted by the entire device.

[0100] It should be noted that, optionally, the dividing point f0 for dividing low frequency and high frequency is between 2 and 5 kHz, that is, the audio value above the dividing point f0 can be determined as belonging to the high frequency part, and the audio value below the dividing point f0 can be determined as belonging to the low frequency part. The specific value of the dividing point f0 can be determined according to the actual sound requirements of the display device.

[0101] When using the display device described in this embodiment, in order to ensure that after the frequency spectrum of the sound emitted by each second exciter 1102 is superimposed with the frequency spectrum of the sound emitted by the first exciter 1101, the sound spectrum emitted by the entire display device has good flatness and uniformity, it is necessary to design and coordinate the passband range of each second exciter 1102, select a suitable low-pass filter, and extract the low-frequency signal in the output audio signal.

[0102] Therefore, in the embodiment of the present disclosure, optionally, it is necessary to test and determine the filtering parameters of the low-pass filter connected to each second exciter 1102 .

[0103] Optionally, in the low-pass filters provided on the audio transmission line from each second exciter 1102 to the audio signal input terminal, different low-pass filters have different cut-off frequencies.

[0104] For the display device described in the embodiment of the present disclosure, the process of testing and determining the filtering parameters of the low-pass filter connected to each second actuator 1102 may include:

[0105] Read the measured spectrum data;

[0106] According to the measured spectrum data, the filter parameters of the low-pass filter corresponding to the second exciter are adjusted to obtain the set filter parameters corresponding to each low-pass filter.

[0107] Among them, when the audio signal input by the audio signal input end passes through the low-pass filter, each low-pass filter adopts the corresponding set filtering parameters to extract the low-frequency signal in the audio signal, and the extracted low-frequency signal is transmitted to the corresponding second exciter, causing the second exciter to vibrate and make sound.

[0108] Optionally, according to the measured spectrum data, adjusting the filtering parameters of the low-pass filter corresponding to the second exciter to obtain the set filtering parameters corresponding to each of the low-pass filters includes:

[0109] When the filtering parameters of the low-pass filter corresponding to each of the second exciters are set to be initial filtering parameters, a first spectrum curve is obtained when the first exciter outputs the full audio signal of the measured spectrum data, a second spectrum curve is obtained when each of the exciters of the sound-emitting unit outputs the full audio signal of the measured spectrum data, and a third spectrum curve is obtained when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output low-frequency signals of the measured spectrum data; wherein N is the number of the second exciters;

[0110] According to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filter parameters are adjusted to obtain the set filter parameters of the low-pass filter corresponding to each of the second exciters.

[0111] Specifically, combined Figure 4 As shown, the process of testing and determining the filtering parameters of the low-pass filter connected to each second exciter 1102 may start from step S410 and further include:

[0112] S420, reading measured spectrum data;

[0113] S430, drawing a first spectrum curve when the first exciter outputs a full audio signal of the measured spectrum data according to the read measured spectrum data;

[0114] S440, reading the number n of the second exciter (that is, for low-frequency compensation);

[0115] S450, plotting a second frequency spectrum curve when the first exciter and the n second exciters all emit full audio signals of measured frequency spectrum data;

[0116] S460, selecting the type and order of the low-pass filter to be used;

[0117] S470, setting initial cutoff frequencies f01, f02, ¨¨, f0n of n second exciters; optionally, the initial cutoff frequencies of the n second exciters may be the same or different from each other;

[0118] S480, designing each low-pass filter according to the initial cut-off frequencies f01, f02, ¨¨, and f0n;

[0119] S490, calculating zero-state responses of n low-pass filters according to the designed low-pass filters;

[0120] S491, according to the principle of sound pressure level enhancement, superimposing the zero-state responses of n low-pass filters and the spectrum curve of the measured spectrum data;

[0121] S492, plotting a third frequency spectrum curve when the first exciter emits a full audio signal of the measured frequency spectrum data and n second exciters emit low-frequency signals of the measured frequency spectrum data;

[0122] S493, comparing the first spectrum curve, the second spectrum curve and the third spectrum curve, determining whether the first spectrum curve, the second spectrum curve and the third spectrum curve meet a preset condition. If the preset condition is met, the process ends and S495 is executed to obtain a set filtering parameter of a low-pass filter corresponding to each second exciter. In the embodiment of the present disclosure, a cutoff frequency of the low-pass filter corresponding to each second exciter is obtained.

[0123] When the preset condition is not met, executing step S494;

[0124] S494, adjusting the filtering parameters, such as adjusting the cutoff frequency of the low-pass filter corresponding to each second exciter, re-obtaining the first spectrum curve, the second spectrum curve and the third spectrum curve, and returning to step S480;

[0125] S495, end.

[0126] In the embodiment of the present disclosure, optionally, the initial filtering parameters include filter type, order and cutoff frequency;

[0127] Wherein, adjusting the filtering parameters comprises:

[0128] The cutoff frequency of each of the low-pass filters is adjusted.

[0129] Further, optionally, the preset condition satisfied by the first spectrum curve, the second spectrum curve and the third spectrum curve is:

[0130] The distance between the third spectrum curve and the first spectrum curve at the low frequency part is less than a first preset value, the distance between the third spectrum curve and the second spectrum curve at the high frequency part is less than a second preset value, and the transition line segment between the low frequency part and the high frequency part is a smooth line segment.

[0131] The display device described in the embodiment of the present disclosure tests and determines the filtering parameters of the low-pass filter connected to each second exciter in the above-mentioned manner, ensuring that after the low-frequency signal of the audio signal is extracted using the determined filtering parameters, the spectrum of the sound emitted by the vibration of each second exciter 1102 is superimposed on the spectrum of the sound emitted by the vibration of the first exciter 1101, and has good flatness and uniformity.

[0132] The display device described in the embodiment of the present disclosure may, optionally, comprehensively consider the improvement of the low-frequency sound pressure level, the transition smoothness near the connection point, and the complexity of the low-pass filter design, and it is recommended to use 7 low-pass exciters, that is, each sound unit includes 7 second exciters and 1 first exciter. Optionally, the low-frequency signal of each second exciter is generated by a 4th-order Butterworth LPF with a cutoff frequency of 140 Hz. Taking this setting parameter as an example, if Figure 5 The sound emission simulation spectrum curve diagram shown uses the display device described in the embodiment of the present disclosure. The sound emission spectrum through low-frequency compensation can ensure the uniformity with the full-frequency signal spectrum emitted by a single exciter.

[0133] Tests have shown that the display device described in the above-mentioned implementation mode of the disclosed embodiment can achieve a better low-frequency compensation effect, and the sound pressure level at frequencies above 100 Hz can reach above 60.82 dB.

[0134] Another implementation of the display device described in the embodiment of the present disclosure is as follows: Figure 6 As shown, in the same sound-generating unit 120, a low-pass filter LPF is provided on the audio transmission line from the first exciter 1101 of at least two exciters to the audio signal input end, and the audio signal of the audio signal input end passes through the low-pass filter, and the low-frequency signal of the audio signal is obtained and then transmitted to each of the first exciters 1101, and the first exciter 1101 vibrates and generates sound;

[0135] A low-pass filter LPF is provided on the first audio transmission line from the second exciter 1102 of the at least two exciters 110 except the first exciter 1101 to the audio signal input end, and a high-pass filter HPF is provided on the second audio transmission line from the second exciter 1102 to the audio signal input end. The audio signal at the audio signal input end is respectively passed through the low-pass filter LPF to obtain a low-frequency signal and passed through the high-pass filter HPF to obtain a high-frequency signal, and the low-frequency signal and the high-frequency signal are transmitted to the second exciter 1102 after signal superposition, and the second exciter 1102 vibrates and produces sound.

[0136] In this implementation, optionally, the number of the second exciter 1102 is one, and in one sound-emitting unit, all exciters except the second exciter 1102 are first exciters 1101 . Optionally, the number of the first exciters 1101 may be seven.

[0137] Further, optionally, the multiple first exciters 1101 share the same low-pass filter LPF, that is, after the audio signal at the audio signal input end passes through the low-pass filter, the obtained low-frequency signal is transmitted to each first exciter 1101 respectively.

[0138] Additionally, optionally, Figure 6As shown, the low-pass filter LPF on the audio transmission line from the second exciter 1102 to the audio signal input end and the low-pass filter LPF on the audio transmission line from the first exciter 1101 to the audio signal input end are the same low-pass filter LPF.

[0139] In this implementation, a low-pass filter LPF is used to extract the low-frequency signal of the audio signal. The low-frequency signal is vibrated and sounded by at least two first exciters 1101 at the same time. After the low-frequency signal and the high-frequency signal are extracted from the output audio signal, the low-frequency signal and the high-frequency signal are superimposed to make the second exciter 1102 vibrate and sound. In this way, the frequency spectrum of the vibration sound of multiple first exciters is superimposed with the frequency spectrum of the vibration sound of the second exciter 1102 to achieve low-frequency compensation, thereby ensuring good flatness and uniformity of the sound spectrum emitted by the entire device.

[0140] In addition, compared to Figure 3 The embodiment shown in the figure can ensure that the phases of the vibration and sound of the first exciter 1101 and the second exciter 1102 are consistent for an audio signal of any frequency.

[0141] In another embodiment of the display device of the present disclosure, Figure 7 As shown, in the same sound-emitting unit, a low-pass filter LPF and a high-pass filter LPF are provided on the audio transmission line from the audio signal input end to each exciter 110, and the audio signal at the audio signal input end is respectively passed through the low-pass filter LPF to obtain a low-frequency signal and passed through the high-pass filter HPF to obtain a high-frequency signal, and the low-frequency signal and the high-frequency signal are transmitted to each of the exciters 110 after signal superposition and normalization processing, and each of the exciters 110 vibrates and produces sound.

[0142] With this implementation, the audio signal inputted from the audio signal input terminal is filtered by the low-pass filter LPF and the high-pass filter HPF respectively, the extracted low-frequency signal is superimposed with the high-frequency signal and the signal is normalized, and the normalized signal is transmitted to each exciter 110, so that the sound spectrum with the low-frequency compensation effect can be obtained. Taking the cutoff frequency fc=80Hz of the low-pass filter LPF as an example, Figure 8 As shown, a sound spectrum with good uniformity and flatness can be obtained.

[0143] Experimental tests have shown that the display device described in this embodiment has a Figure 3 The display device of the illustrated embodiment has a better low-frequency compensation effect, and the sound pressure level at frequencies above 100 Hz can reach above 61 dB.

[0144] In the display device described in the embodiment of the present disclosure, a signal filter is provided on the audio transmission line of at least one exciter. When at least two exciters in the sound-emitting unit vibrate and emit sound at the same time, the sound emitted by the entire sound-emitting unit is compensated for low frequency by utilizing the sound emitted by the vibration of the exciter on which the signal filter is provided, thereby ensuring good flatness and uniformity of the overall frequency spectrum of the sound emitted by the display device using screen sound technology.

[0145] Another embodiment of the present disclosure further provides a sound control method, which is applied to the display device as described in any one of the above items. Fig. 9 As shown, the method includes:

[0146] S910, acquiring image information to be output and each audio signal corresponding to the image information;

[0147] S920, determining, according to the image information, a sound emitting unit when each of the audio signals is output;

[0148] S930, input each of the audio signals to the audio signal input end of the corresponding sound-emitting unit, so that each exciter in the sound-emitting unit connected to the audio signal input end vibrates and emits sound in response to the same audio signal.

[0149] By adopting the sound control method described in this embodiment, the same audio signal can be transmitted to at least two exciters in a sound unit for vibration sound generation. The sound generated by the vibration of the exciter equipped with a signal filter is used to perform low-frequency compensation for the sound emitted by the entire sound unit, thereby ensuring the flatness and uniformity of the overall frequency spectrum of the sound emitted by the display device adopting screen sound generation technology.

[0150] Optionally, the sound control method, wherein in step S920, determining, according to the image information, a sound unit when each of the audio signals is output, comprises:

[0151] identifying a sound-making object corresponding to the audio signal in the image information;

[0152] determining a display position of the sound-emitting object in the image information on the display panel when the display panel displays the image information;

[0153] A sound generating unit disposed at the display position is determined for sound output of the audio signal.

[0154] By adopting the above-mentioned method of determining the sound-emitting unit when the audio signal is output, the position of the sound-emitting object in the image displayed on the display panel can be made consistent with the position of the audio signal output, thereby achieving the effect of unity of sound and picture.

[0155] Another embodiment of the present disclosure further provides a sound control device, which is applied to the display device as described in any one of the above items. Fig.10 As shown, the device comprises:

[0156] The signal acquisition module 1001 is used to acquire the image information to be output and each audio signal corresponding to the image information;

[0157] An analysis module 1002 is used to determine, according to the image information, a sound emission unit when each of the audio signals is output;

[0158] The signal transmission module 1003 is used to input each of the audio signals to the audio signal input end of the corresponding sound-emitting unit, so that each exciter in the sound-emitting unit connected to the audio signal input end vibrates and emits sound in response to the same audio signal.

[0159] Optionally, in the sound control device, the analysis module 1002 determines the sound emission unit when each audio signal is output according to the image information, specifically for:

[0160] identifying a sound-making object corresponding to the audio signal in the image information;

[0161] determining a display position of the sound-emitting object in the image information on the display panel when the display panel displays the image information;

[0162] A sound generating unit disposed at the display position is determined for sound output of the audio signal.

[0163] Another aspect of the present disclosure is to provide a method for determining a signal filtering parameter, which is applied to a display device as described in any one of the above items. Fig.11 As shown, the method includes:

[0164] S1110, reading measured spectrum data;

[0165] S1120, according to the measured spectrum data, debugging the filtering parameters of the signal filter on the audio transmission line from the audio signal input terminal to each of the exciters in each of the sound-emitting units, and obtaining the set filtering parameters corresponding to each of the signal filters, so that through the set filtering parameters, when each exciter connected to the audio signal input terminal in the sound-emitting unit vibrates and makes sound in response to the same audio signal, the sound emitted by the entire sound-emitting unit has low-frequency compensation.

[0166] By adopting the signal filtering parameter determination method described in the embodiment of the present disclosure, the filtering parameters of the signal filter set in the display device described in the embodiment of the present disclosure can be determined to ensure that the signal filter with the filtering parameters has a low-frequency compensation effect when the exciter vibrates and makes sound.

[0167] Optionally, in the method for determining signal filtering parameters, in which, in the same sound-emitting unit, no signal filter is provided on the audio transmission line from the first exciter to the audio signal input terminal, and a low-pass filter is provided on the audio transmission line from each second exciter other than the first exciter to the audio signal input terminal of at least two exciters, in step S1120, based on the measured spectrum data, the filtering parameters of the signal filter provided on the audio transmission line from the audio signal input terminal to each exciter in each of the sound-emitting units are debugged to obtain the set filtering parameters corresponding to each of the signal filters, including:

[0168] When the filtering parameters of the low-pass filter corresponding to each of the second exciters are set to be initial filtering parameters, a first spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data, a second spectrum curve when each of the exciters outputs the full audio signal of the measured spectrum data, and a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output low-frequency signals of the measured spectrum data are obtained; wherein N is the number of the second exciters;

[0169] According to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filter parameters are adjusted to obtain the set filter parameters of the low-pass filter corresponding to each of the second exciters.

[0170] Optionally, the signal filtering parameter determination method, wherein obtaining a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output low-frequency signals of the measured spectrum data, comprises:

[0171] Calculate the zero-state responses of N second exciters according to the initial filter parameters of the low-pass filter corresponding to each second exciter;

[0172] The zero-state responses of the N second exciters are superimposed on the spectrum curve of the measured spectrum data to generate the third spectrum curve.

[0173] Optionally, in the signal filtering parameter determination method, the initial filtering parameters include filter type, order and cutoff frequency;

[0174] Wherein, adjusting the filtering parameters comprises:

[0175] The cutoff frequency of each of the low-pass filters is adjusted.

[0176] Optionally, the signal filtering parameter determination method, wherein, according to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filtering parameters are adjusted to obtain the set filtering parameters of the low-pass filter corresponding to each second exciter, comprises:

[0177] comparing the first spectrum curve, the second spectrum curve and the third spectrum curve;

[0178] When the first spectrum curve, the second spectrum curve and the third spectrum curve do not meet a preset condition, adjusting the filtering parameters to re-obtain the first spectrum curve, the second spectrum curve and the third spectrum curve;

[0179] When the first spectrum curve, the second spectrum curve and the third spectrum curve meet preset conditions, set filtering parameters of the low-pass filter corresponding to each of the second exciters are obtained.

[0180] Optionally, in the signal filtering parameter determination method, the preset condition is:

[0181] The distance between the third spectrum curve and the first spectrum curve at the low frequency part is less than a first preset value, the distance between the third spectrum curve and the second spectrum curve at the high frequency part is less than a second preset value, and the transition line segment between the low frequency part and the high frequency part is a smooth line segment.

[0182] Another embodiment of the present disclosure further provides a signal filtering parameter determination device, which is applied to the display device as described in any one of the above items. Fig.12 As shown, the device comprises:

[0183] The signal reading module 1210 is used to read the measured spectrum data;

[0184] The data debugging module 1220 is used to debug the filtering parameters of the signal filter on the audio transmission line from the audio signal input terminal to each of the exciters in each of the sound-emitting units according to the measured spectrum data, and obtain the set filtering parameters corresponding to each of the signal filters, so that through the set filtering parameters, when each exciter connected to the audio signal input terminal in the sound-emitting unit vibrates and sounds in response to the same audio signal, the sound emitted by the entire sound-emitting unit has low-frequency compensation.

[0185] Optionally, in the signal filtering parameter determination device, in which, in the same sound-emitting unit, no signal filter is provided on the audio transmission line from the first exciter to the audio signal input terminal, and a low-pass filter is provided on the audio transmission line from each second exciter except the first exciter in at least two exciters to the audio signal input terminal, the data debugging module 1220 debugs the filtering parameters of the signal filter provided on the audio transmission line from the audio signal input terminal to each exciter in each of the sound-emitting units according to the measured spectrum data, and obtains the set filtering parameters corresponding to each of the signal filters, including:

[0186] When the filtering parameters of the low-pass filter corresponding to each of the second exciters are set to be initial filtering parameters, a first spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data, a second spectrum curve when each of the exciters outputs the full audio signal of the measured spectrum data, and a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output low-frequency signals of the measured spectrum data are obtained; wherein N is the number of the second exciters;

[0187] According to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filter parameters are adjusted to obtain the set filter parameters of the low-pass filter corresponding to each of the second exciters.

[0188] Optionally, in the signal filtering parameter determination device, the data debugging module 1220 obtains a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and the N second exciters output the low-frequency signals of the measured spectrum data, including:

[0189] Calculate the zero-state responses of N second exciters according to the initial filter parameters of the low-pass filter corresponding to each second exciter;

[0190] The zero-state responses of the N second exciters are superimposed on the spectrum curve of the measured spectrum data to generate the third spectrum curve.

[0191] Optionally, in the signal filtering parameter determination device, the initial filtering parameters include filter type, order and cutoff frequency;

[0192] Wherein, adjusting the filtering parameters comprises:

[0193] The cutoff frequency of each of the low-pass filters is adjusted.

[0194] Optionally, the signal filtering parameter determination device, wherein the data debugging module 1220 adjusts the filtering parameters according to the comparison results of the first spectrum curve, the second spectrum curve and the third spectrum curve to obtain the set filtering parameters of the low-pass filter corresponding to each second exciter, includes:

[0195] comparing the first spectrum curve, the second spectrum curve and the third spectrum curve;

[0196] When the first spectrum curve, the second spectrum curve and the third spectrum curve do not meet a preset condition, adjusting the filtering parameters to re-obtain the first spectrum curve, the second spectrum curve and the third spectrum curve;

[0197] When the first spectrum curve, the second spectrum curve and the third spectrum curve meet preset conditions, set filtering parameters of the low-pass filter corresponding to each of the second exciters are obtained.

[0198] Optionally, in the signal filtering parameter determination device, the preset condition is:

[0199] The distance between the third spectrum curve and the first spectrum curve at the low frequency part is less than a first preset value, the distance between the third spectrum curve and the second spectrum curve at the high frequency part is less than a second preset value, and the transition line segment between the low frequency part and the high frequency part is a smooth line segment.

[0200] Another aspect of the present disclosure is to provide a screen sound device, such as Fig.13 As shown, including:

[0201] A plurality of sound generating units 120 arranged in an array, each sound generating unit comprising at least two exciters 110;

[0202] A circuit board 200 is provided with a plurality of audio input terminals 210, wherein each audio input terminal 210 corresponds to a sound-emitting unit 120, and the audio input terminal 210 is connected to each exciter 110 corresponding to the sound-emitting unit via an audio transmission line; wherein, in each sound-emitting unit 120, a signal filter is provided on the audio transmission line from the audio input terminal 210 to at least one exciter.

[0203] With the screen sound-emitting device described in this embodiment, an audio input terminal 210 is connected to each exciter 110 of a sound-emitting unit 120, so that multiple exciters 110 of the sound-emitting unit 120 vibrate and emit sound at the same time, and the sound emitted by the vibration of the exciter with a signal filter can be used to perform low-frequency compensation for the sound emitted by the entire sound-emitting unit 120.

[0204] The screen sound-generating device described in the embodiment of the present disclosure, wherein: Fig.13 As shown, each of the sound-generating units 120 further includes a plurality of display units 300 arranged in an array, and each display unit 300 is provided with an actuator 110 .

[0205] Optionally, the display units 300 of multiple sound units 120 form a display panel, or one display unit 300 forms a display sub-panel, and adjacent display sub-panels are spliced.

[0206] When the display units 300 of the multiple sound units 120 form a display panel, that is, the multiple display units 300 are combined to form an integral panel, each display unit 300 corresponds to a display area, and an exciter 110 is respectively set accordingly. At least two array-distributed display areas 300 and the exciter 110 set on each display area 300 form a sound unit 120. In one sound unit 120, the exciters 110 respectively set on each display area 300 are respectively connected to the same audio signal input terminal.

[0207] Optionally, when the display units 300 of the plurality of sound units 120 form a display panel, the display panel may be, but is not limited to, an OLED display panel.

[0208] In another embodiment, a display unit 300 is formed into a display sub-panel, and adjacent display sub-panels are spliced ​​to form a full-screen display panel. Each display sub-panel is provided with an exciter 110, wherein the exciters 110 provided on the adjacent display sub-panels and each display sub-panel form a sound unit 120, and each exciter 110 in a sound unit 120 is connected to the same audio signal input terminal.

[0209] In this implementation, optionally, the display panel formed by splicing a plurality of display sub-panels may be, but is not limited to, only a Min LED display panel.

[0210] The screen sound device described in the embodiment of the present disclosure, one implementation method thereof is as follows: Figure 3 As shown, in the same sound-generating unit 120, no signal filter is provided on the audio transmission line from the first exciter 1101 of at least two exciters 110 to the audio signal input terminal;

[0211] A low-pass filter is provided on the audio transmission line from each second exciter 1102 of the at least two exciters 110 except the first exciter 1101 to the audio signal input end.

[0212] With this implementation structure, the audio signal at the audio signal input end is directly transmitted to the first exciter 1101, which vibrates and produces sound; the audio signal at the audio signal input end passes through the low-pass filter, obtains the low-frequency signal at the audio signal input end, and then is transmitted to the second exciter 1102, which vibrates and produces sound.

[0213] Optionally, the number of the first exciter 1101 is one, and the audio signal output to the first exciter is the sound signal to be output, that is, a full-frequency sound signal including any audio value. The second exciter 1102 includes each exciter in a sound generating unit 120 except the first exciter 1101.

[0214] In this embodiment, the low-frequency signal of the output audio signal is extracted by a low-pass filter LPF connected to the second exciter 1102, the full-frequency sound signal of the output audio signal is vibrated and sounded by the first exciter, and the low-frequency signal of the output audio signal is vibrated and sounded by at least two second exciters at the same time, thereby ensuring the uniformity and good flatness of the emitted sound spectrum. In another embodiment of the screen sound-generating device described in the embodiment of the present disclosure, as Figure 6 As shown, in the same sound-generating unit 120, a low-pass filter LPF is provided on the audio transmission line from the first exciter 1101 of at least two exciters 110 to the audio signal input end;

[0215] A low-pass filter LPF is provided on the first audio transmission line from the second exciter 1102 of at least two exciters 110 except the first exciter 1101 to the audio signal input terminal; a high-pass filter HPF is provided on the second audio transmission line from the second exciter to the audio signal input terminal.

[0216] With this implementation structure, the audio signal at the audio signal input end passes through the low-pass filter to obtain the low-frequency signal of the audio signal and then transmits it to the first exciter 1101, which vibrates and produces sound; the audio signal at the audio signal input end passes through the low-pass filter LPF to obtain the low-frequency signal and passes through the high-pass filter HPF to obtain the high-frequency signal, and the low-frequency signal and the high-frequency signal are superimposed and transmitted to the second exciter 1102, which vibrates and produces sound.

[0217] Optionally, the number of the second exciter 1102 is one, and in one sound-emitting unit, all exciters except the second exciter 1102 are first exciters 1101. Optionally, the number of the first exciters 1101 may be seven.

[0218] Further, optionally, the multiple first exciters 1101 share the same low-pass filter LPF, that is, after the audio signal at the audio signal input end passes through the low-pass filter, the obtained low-frequency signal is transmitted to each first exciter 1101 respectively.

[0219] Additionally, optionally, Figure 6 As shown, the low-pass filter LPF on the audio transmission line from the second exciter 1102 to the audio signal input end and the low-pass filter LPF on the audio transmission line from the first exciter 1101 to the audio signal input end are the same low-pass filter LPF.

[0220] In this implementation, a low-pass filter LPF is used to extract the low-frequency signal of the audio signal. The low-frequency signal is vibrated and sounded by at least two first exciters 1101 at the same time. After the low-frequency signal and the high-frequency signal are extracted from the output audio signal, the low-frequency signal and the high-frequency signal are superimposed to make the second exciter 1102 vibrate and sound. In this way, the frequency spectrum of the vibration sound of multiple first exciters 1101 is superimposed with the frequency spectrum of the vibration sound of the second exciter 1102 to achieve low-frequency compensation and ensure the good flatness and uniformity of the sound spectrum emitted by the entire device. The screen sound-generating device described in the embodiment of the present disclosure, such as Figure 7 As shown, in the same sound-generating unit 120, a low-pass filter LPF and a high-pass filter HPF are sequentially arranged on the audio transmission line from the audio signal input end to each exciter 110.

[0221] With this implementation structure, the audio signal at the audio signal input end is respectively passed through the low-pass filter LPF to obtain a low-frequency signal and passed through the high-pass filter HPF to obtain a high-frequency signal, and the low-frequency signal and the high-frequency signal are transmitted to each of the exciters 110 after signal superposition and normalization processing, and each of the exciters 110 vibrates and produces sound.

[0222] With this implementation, the audio signal inputted from the audio signal input terminal is filtered by the low-pass filter LPF and the high-pass filter HPF respectively, the extracted low-frequency signal is superimposed with the high-frequency signal and the signal is normalized, and the normalized signal is transmitted to each exciter 110, so that the sound spectrum with the low-frequency compensation effect can be obtained. Taking the cutoff frequency fc=80Hz of the low-pass filter LPF as an example, Figure 8 As shown, a sound spectrum with good uniformity and flatness can be obtained.

[0223] The screen sound emitting device described in the embodiment of the present disclosure may optionally further include a processor for inputting an audio signal to each audio input terminal respectively.

[0224] Optionally, the processor is specifically used to obtain a display image to be output and each audio signal corresponding to the display image, determine the sound-emitting unit when each audio signal is output according to the display image, input each audio signal to the audio signal input end of the corresponding sound-emitting unit, and make each exciter in the sound-emitting unit connected to the audio signal input end vibrate and make sound in response to the same audio signal.

[0225] In the embodiment of the present disclosure, optionally, the actuator may be a piezoelectric ceramic actuator or a micro-vibration actuator.

[0226] In addition, it should be noted that the sound control method of the screen sound device described in the embodiment of the present disclosure can adopt the sound device method of the above-mentioned display device. Moreover, in the sound device described in the embodiment of the present disclosure, the signal filtering parameter determination method adopted can apply the signal filtering parameter determination method adopted by the above-mentioned display device, which will not be described in detail here.

[0227] The above is a preferred embodiment of the present disclosure. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles described in the present disclosure. These improvements and modifications should also be regarded as within the scope of protection of the present disclosure.

Claims

1. A method for determining signal filtering parameters, characterized in that: Applied to a display device, the display device comprising: Display panel; A plurality of exciters are arranged on the display panel, and the display panel can generate sound through the plurality of exciters; wherein the plurality of exciters form at least one sound-generating unit, and each of the sound-generating units includes at least two exciters, and each exciter in the same sound-generating unit is connected to the same audio signal input terminal, and in one of the sound-generating units, a signal filter is arranged on the audio transmission line from the audio signal input terminal to at least one of the exciters, for low-frequency compensation of the sound generated by the entire sound-generating unit; Wherein, the method comprises: Read the measured spectrum data; According to the measured spectrum data, the filter parameters of the signal filter set on the audio transmission line from the audio signal input end to each of the exciters in each of the sound-emitting units are debugged to obtain the set filter parameters corresponding to each of the signal filters, so that through the set filter parameters, each exciter connected to the audio signal input end in the sound-emitting unit has low-frequency compensation when vibrating and sounding in response to the same audio signal; wherein, in the same sound-emitting unit, no signal filter is set on the audio transmission line from the first exciter to the audio signal input end, and a low-pass filter is set on the audio transmission line from each of the second exciters except the first exciter to the audio signal input end of at least two exciters, according to the measured spectrum data, the filter parameters of the signal filter set on the audio transmission line from the audio signal input end to each of the exciters in each of the sound-emitting units are debugged to obtain the set filter parameters corresponding to each of the signal filters, including: When the filtering parameters of the low-pass filter corresponding to each of the second exciters are set to be initial filtering parameters, a first spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data, a second spectrum curve when the first exciter and N second exciters respectively output the full audio signal of the measured spectrum data, and a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output the low-frequency signals of the measured spectrum data are obtained; wherein N is the number of the second exciters; According to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filter parameters are adjusted to obtain the set filter parameters of the low-pass filter corresponding to each of the second exciters.

2. The method for determining signal filtering parameters according to claim 1, wherein: Obtaining a third spectrum curve when the first exciter outputs a full audio signal of the measured spectrum data and N second exciters output low-frequency signals of the measured spectrum data, comprising: Calculate the zero-state responses of N second exciters according to the initial filter parameters of the low-pass filter corresponding to each second exciter; The zero-state responses of the N second exciters are superimposed on the spectrum curve of the measured spectrum data to generate the third spectrum curve.

3. The method for determining signal filtering parameters according to claim 1, wherein: The initial filtering parameters include filter type, order and cut-off frequency; Wherein, adjusting the filtering parameters comprises: The cutoff frequency of each of the low-pass filters is adjusted.

4. The method for determining signal filtering parameters according to claim 1, wherein: According to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filter parameters are adjusted to obtain the set filter parameters of the low-pass filter corresponding to each of the second exciters, including: comparing the first spectrum curve, the second spectrum curve and the third spectrum curve; When the first spectrum curve, the second spectrum curve and the third spectrum curve do not meet a preset condition, adjusting the filtering parameters to re-obtain the first spectrum curve, the second spectrum curve and the third spectrum curve; When the first spectrum curve, the second spectrum curve and the third spectrum curve meet preset conditions, set filtering parameters of the low-pass filter corresponding to each of the second exciters are obtained.

5. The method for determining signal filtering parameters according to claim 4, wherein: The preset conditions are: The distance between the third spectrum curve and the first spectrum curve at the low frequency part is less than a first preset value, the distance between the third spectrum curve and the second spectrum curve at the high frequency part is less than a second preset value, and the transition line segment between the low frequency part and the high frequency part is a smooth line segment.

6. A signal filtering parameter determination device, characterized in that: Applied to a display device, the display device comprising: Display panel; A plurality of exciters are arranged on the display panel, and the display panel can generate sound through the plurality of exciters; wherein the plurality of exciters form at least one sound-generating unit, and each of the sound-generating units includes at least two exciters, and each exciter in the same sound-generating unit is connected to the same audio signal input terminal, and in one of the sound-generating units, a signal filter is arranged on the audio transmission line from the audio signal input terminal to at least one of the exciters, for low-frequency compensation of the sound generated by the entire sound-generating unit; Wherein, the signal filtering parameter determination device comprises: A signal reading module is used to read the measured spectrum data; A data debugging module, for debugging the filtering parameters of the signal filter provided on the audio transmission line from the audio signal input terminal to each of the exciters in each of the sound-emitting units according to the measured spectrum data, and obtaining the set filtering parameters corresponding to each of the signal filters, so that through the set filtering parameters, when each exciter connected to the audio signal input terminal in the sound-emitting unit vibrates and sounds in response to the same audio signal, the sound emitted by the entire sound-emitting unit has low-frequency compensation; Wherein, in the same sound-emitting unit, when no signal filter is provided on the audio transmission line from the first exciter to the audio signal input end, and a low-pass filter is provided on the audio transmission line from each second exciter except the first exciter among at least two exciters to the audio signal input end, the data debugging module debugs the filtering parameters of the signal filter provided on the audio transmission line from the audio signal input end to each of the exciters in each of the sound-emitting units according to the measured spectrum data, and obtains the set filtering parameters corresponding to each of the signal filters, including: When the filtering parameters of the low-pass filter corresponding to each of the second exciters are set to be initial filtering parameters, a first spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data, a second spectrum curve when the first exciter and N second exciters respectively output the full audio signal of the measured spectrum data, and a third spectrum curve when the first exciter outputs the full audio signal of the measured spectrum data and N second exciters output the low-frequency signals of the measured spectrum data are obtained; wherein N is the number of the second exciters; According to the comparison result of the first spectrum curve, the second spectrum curve and the third spectrum curve, the filter parameters are adjusted to obtain the set filter parameters of the low-pass filter corresponding to each of the second exciters.

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