Laser television and sounding method thereof

Abstract

The invention relates to a laser television and a sounding method thereof, and relates to the technical field of laser televisions. The laser television comprises a host and a screen. The host comprises a mainboard and a power panel; the screen comprises a power adapter, a screen sound production board and a plurality of vibrators arranged in the screen sound production board. The power panel is connected with the power supply circuit and supplies power to the host; the power adapter is connected with the power supply circuit and configured to supply power to the screen; the mainboard is configured to obtain audio data of at least one sound channel and modulate the audio data into analog audio signals of a first frequency band; the power board is further configured to send the analog audio signal into the power supply circuit; the power adapter is further configured to couple an analog audio signal from the power supply circuit; and a screen sound production board configured to demodulate the analog audio signal coupled by the power adapter to obtain audio data of the at least one sound channel, and drive at least one of the plurality of vibrators to produce sound based on the audio data of the at least one sound channel.

Description

Technical Field

[0001] The present application relates to the technical field of laser televisions, and in particular to a laser television and a sound generation method of the laser television. Background Art

[0002] In the screen sound scheme of laser TV, the audio signal generated by the host of the laser TV needs to be transmitted to the screen of the laser TV, so that the audio signal drives the vibrator set in the sound plate of the screen to vibrate and realize the sound of the laser TV.

[0003] At present, the transmission of audio signals in the multi-channel screen sound scheme of laser TV mainly relies on audio cables or multi-transmitter and multi-receiver wireless communication modules. That is, the audio signal generated by the host is transmitted to the screen sound board of the laser TV through the audio cable, or the audio signal generated by the host is transmitted to the screen sound board of the laser TV through the wireless transceiver module. However, when the audio signal is transmitted through the audio cable, two audio cables are required for each channel. When transmitting multiple channels, multiple audio cables need to be connected between the host and the screen, which affects the appearance and takes up additional user space. The multi-transmitter and multi-receiver wireless communication module can avoid connecting the audio cable between the host and the screen. It only needs to deploy the wireless transceiver module in the host and the screen. However, the deployment of the wireless transmission module often requires the redesign of the overall structure stacking, which not only increases the complexity of the design, but also increases the complexity of production and assembly. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a laser TV and a sound-generating method for a laser TV, so as to enable the laser TV to support multi-channels while avoiding connecting multiple audio cables between the host and the screen and avoiding deploying wireless transceiver modules in the host and the screen.

[0005] In order to achieve the above purpose, the technical solutions provided by the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a laser TV, comprising: a host and a screen; the host comprises: a main board and a power board; the screen comprises: a power adapter, a screen sound board, and a plurality of vibrators arranged in the screen sound board;

[0007] The power board is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to supply power to the host;

[0008] The power adapter is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the screen;

[0009] The mainboard is configured to obtain audio data of at least one channel and modulate the audio data of the at least one channel into an analog audio signal of a first frequency band;

[0010] The power board is further configured to send the analog audio signal to the power supply circuit;

[0011] The power adapter is further configured to couple the analog audio signal from the power supply circuit;

[0012] The screen sound board is configured to demodulate the analog audio signal coupled by the power adapter to obtain audio data of the at least one channel, and drive at least one of the multiple vibrators to produce sound based on the audio data of the at least one channel.

[0013] In a second aspect, an embodiment of the present application provides a sound-generating method for a laser television, wherein the laser television comprises: a host and a screen; the host comprises: a main board and a power board; the screen comprises: a power adapter, a screen sound-generating board, and a plurality of vibrators arranged in the screen sound-generating board; the power board is connected to a power supply circuit for rectifying the power provided by the power supply circuit to power the host; the power adapter is connected to the power supply circuit for rectifying the power provided by the power supply circuit to power the screen; the method comprises:

[0014] Acquire audio data of at least one channel through the mainboard, and modulate the audio data of the at least one channel into an analog audio signal of a first frequency band;

[0015] sending the analog audio signal to the power supply circuit via the power board;

[0016] coupling the analog audio signal from the power supply circuit via the power adapter;

[0017] The analog audio signal coupled to the power adapter is demodulated by the power adapter to obtain audio data of the at least one channel, and at least one of the multiple vibrators is driven to produce sound based on the audio data of the at least one channel.

[0018] In a third aspect, the present application provides a computer-readable storage medium, including: a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the sound generation method of the laser television as described in the second aspect is implemented.

[0019] In a fourth aspect, the present application provides a computer program product, which includes a computer program. When the computer program is run on a computer, the computer implements the sound generation method of the laser television as described in the third aspect.

[0020] The laser TV provided in the embodiment of the present application includes: a host and a screen; the host includes: a main board and a power board; the screen includes: a power adapter, a screen sound board and a plurality of vibrators arranged in the screen sound board; the power board is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the host; the power adapter is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the screen; the main board is configured to obtain audio data of at least one channel and modulate the audio data of at least one channel into an analog audio signal of a first frequency band; the power board is also configured to send the analog audio signal to the power supply circuit; the power adapter is also configured to couple the analog audio signal from the power supply circuit; the screen sound board is configured to demodulate the analog audio signal coupled by the power adapter to obtain the audio data of the at least one channel, and drive at least one of the plurality of vibrators to sound based on the audio data of the at least one channel. Since the transmission paths of the audio data of each channel of the laser TV provided in the embodiment of the present application are, in sequence, the main board, the power board, the power line, the power adapter, the screen sound board, and a plurality of vibrators arranged in the screen sound board, the embodiment of the present application can transmit the audio data of each channel between the host and the screen through the power supply circuit for providing power to the host and the screen, thereby avoiding connecting audio cables between the host and the screen and avoiding deploying wireless transceiver modules in the host and the screen. Therefore, the embodiment of the present application can enable the laser TV to support multi-channels while avoiding connecting multiple audio cables between the host and the screen and avoiding deploying wireless transceiver modules in the host and the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1A Schematic diagram of projection scene of laser TV in some embodiments of the present application;

[0024] Figure 1B This is a schematic diagram of the structure of a laser TV in some embodiments of the present application;

[0025] Figure 2 This is a schematic diagram of the structure of a mainboard of a laser TV host in some embodiments of the present application;

[0026] Figure 3 This is a schematic diagram of the structure of a power board of a laser TV host in some embodiments of the present application;

[0027] Figure 4 This is a schematic diagram of the structure of a power adapter for a laser TV screen in some embodiments of the present application;

[0028] Figure 5 This is a schematic structural diagram of a first coupling circuit in some embodiments of the present application;

[0029] Figure 6 This is a schematic diagram of the structure of a screen sounding board of a laser TV screen in some embodiments of the present application;

[0030] Figure 7 This is a schematic diagram of the structure of a third-order bandpass Butterworth filter for a laser TV in some embodiments of the present application;

[0031] Figure 8 This is a schematic diagram of the structure of the screen sound board of the laser TV in some other embodiments of the present application;

[0032] Fig. 9 This is a schematic diagram of the structure of a power board of a laser TV in some other embodiments of the present application;

[0033] Fig.10 A schematic diagram of the structure of the second coupling circuit in some embodiments of the present application;

[0034] Fig.11 A schematic diagram of the structure of a mainboard of a laser TV in some other embodiments of the present application;

[0035] Fig.12 The present application implements a flowchart of the steps of the sound generation method of a laser television in some other embodiments. DETAILED DESCRIPTION

[0036] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0038] Usually, a laser TV consists of a laser TV host and a laser TV screen. The laser TV screen is provided with a screen sound board, in which a vibrator is provided. The laser TV screen drives the vibrator on the screen sound board to vibrate by receiving the digital audio signal sent by the laser TV host, thereby achieving screen sound.

[0039] Figure 1A Schematic diagram of projection scene of laser TV in some embodiments of the present application. Figure 1A As shown, the laser TV includes: a host 100 and a screen 200. The host 100 is used to project a display image to the screen 200 based on laser, and the screen 200 is used to display the display image projected by the host 100. A screen sounding board 22 and a plurality of vibrators 200 arranged in the screen sounding board 22 are also provided inside the screen 200. The screen 200 is also used to realize the sound of the laser TV through the screen sounding board 22. In addition, the host 100 and the screen 200 are respectively connected to the power supply circuit 300 through power lines, and the power supply circuit 300 is used to supply power to the host 100 and the screen 200.

[0040] Figure 1B Schematic diagram of the structure of the laser TV in some embodiments of the present application. Figure 1B As shown, in some embodiments of the present application, the laser TV includes: a host 100 and a screen 200. The host 100 includes: a main board 11 and a power board 12. The screen 200 includes: a power adapter 21, a screen sound board 22, and a plurality of vibrators 220 disposed in the screen sound board 22.

[0041] The power board 12 is connected to the power supply circuit 300, and is used to rectify the power provided by the power supply circuit 300 to power the host 100. The power adapter 21 is connected to the power supply circuit 300, and is configured to rectify the power provided by the power supply circuit 300 to power the screen 100. The main board 11 is configured to obtain audio data of at least one channel and modulate the audio data of at least one channel into an analog audio signal of a first frequency band; the power board 12 is also configured to send the analog audio signal to the power supply circuit 300; the power adapter 21 is also configured to couple the analog audio signal from the power supply circuit; the screen sound board 22 is configured to demodulate the analog audio signal coupled by the power adapter to obtain the audio data of at least one channel, and drive at least one of the multiple vibrators to produce sound 220 based on the audio data of at least one channel.

[0042] In some embodiments, the mainboard is specifically configured to receive audio data transmitted via interfaces such as the Internet, High Definition Multimedia Interface (HDMI), and Universal Serial Bus (USB).

[0043] The number and arrangement of the vibrators provided in the screen sound board are not limited in the embodiments of the present application. Driving at least one of the multiple vibrators to sound based on the audio data of the at least one channel means: driving the vibrators corresponding to each channel to sound based on the audio data of each channel. For example: the audio data of at least one channel includes: audio data of the first channel and audio data of the second channel, the vibrators corresponding to the first channel are vibrator A and vibrator B, and the vibrators corresponding to the second channel are vibrator D and vibrator E, then driving at least one of the multiple vibrators to sound based on the audio data of the at least one channel includes: driving vibrator A and vibrator B to sound based on the audio data of the first channel, and driving vibrator D and vibrator E to sound based on the audio data based on the second channel.

[0044] In some embodiments, the first frequency band is [3 MHz, 5.5 MHz].

[0045] In some embodiments, the input of the power circuit 12 (power provided by the power supply circuit 300) is 220V AC power, and the output of the power circuit 12 is 12V DC power.

[0046] Reference Figure 2 As shown, in some embodiments, the mainboard 11 includes: a system chip 111, a first modulation and demodulation chip 112, a first operational amplifier 113, a power supply circuit 114, and an interface module 115. The system chip 111 is configured to obtain audio encoding data and decode the audio encoding data to obtain the audio data of the at least one channel; the first modulation and demodulation chip 112 is configured to modulate the audio data of the at least one channel to obtain the analog audio signal; the first operational amplifier 113 is configured to linearly amplify the analog audio signal and input the linearly amplified analog audio signal into the power adapter 300; the power supply circuit 114 is connected to the power board 12 through the interface module 115, and is used to power the mainboard 11 through the power rectified by the power board 12. The mainboard 11 outputs the analog audio signal to the power board 12 through the interface module 115.

[0047] In some embodiments, the system on chip (SOC) 111 may be a chip such as MT9639, MT9653, etc., and may output the audio data of at least one channel obtained by decoding through an integrated circuit built-in audio bus (Inter-IC Sound, I2S). Figure 2 In the figure, the system chip 111 outputs the audio data of each channel through I2S1, I2S2, ..., I2Sn as an example.

[0048] In some embodiments, the first modem chip 112 may be a G.hn chip. After receiving the audio data of at least one channel output by the system chip 111 via I2S, the first modem chip 112 converts the audio data of at least one channel into a G.hn protocol data format and modulates the data into an analog audio signal of a first frequency band.

[0049] In some embodiments, when the audio data of at least one channel includes audio data of multiple channels, the first modem chip 112 is specifically configured to modulate the audio data of the multiple channels into analog signals and send them at different times.

[0050] In some embodiments, when the audio data of at least one channel includes audio data of multiple channels, the first modem chip 112 is specifically configured to modulate the audio data of the multiple channels into analog signals of different frequencies respectively.

[0051] In some embodiments, the first modem chip 112 is specifically configured to perform orthogonal frequency division multiplexing (OFDM) on the audio data of the at least one channel to obtain an analog differential signal corresponding to the audio data of the at least one channel.

[0052] Among them, OFDM technology is a multi-carrier modulation technology developed from multi-carrier modulation (MCM) technology. OFDM technology can realize parallel transmission of high-speed serial data through frequency division multiplexing, and has good anti-multipath fading ability. In the embodiment of the present application, the audio data of each channel is modulated by OFDM technology, so that the audio data of each channel is transmitted in parallel through frequency division multiplexing. Therefore, the embodiment of the present application can maintain the synchronous transmission of multi-channel data in the time domain and reduce the transmission delay between multiple channels. Different from the traditional practice of one signal line and one ground line, the differential signal transmits signals on both signal lines, and the two signals have the same amplitude and opposite phase. The signal transmitted on these two signal lines is a differential signal. The signal receiving end compares the difference between the two voltages to determine the logical state sent by the transmitting end. On the circuit board, the differential traces must be two lines of equal length, equal width, close proximity, and on the same layer.

[0053] In some embodiments, the first operational amplifier 113 may linearly amplify the analog audio signal by a factor of 10.

[0054] In some embodiments, the interface module 115 includes a 12V DC interface, a GND interface, a TRX+ interface, and a TRX- interface.

[0055] Reference Figure 3 As shown, in some embodiments, the power board 12 includes: a rectifier circuit 121 and an interface module 122 .

[0056] The rectifier circuit 121 includes a plurality of DCDC chips, which are used to rectify the power provided to the power supply circuit into the rated voltage of the mainboard, and supply power to the mainboard through the interface module 122 .

[0057] In some embodiments, the interface module 112 includes a 12V DC interface, a GND interface, a TRX+ interface, and a TRX- interface. Each interface of the interface module 112 is connected to a corresponding interface of the power board via a twisted pair of electronic wires. Connecting each interface of the power board 12 with each interface of the mainboard 11 via twisted pair of electronic wires can eliminate industrial mode interference.

[0058] Reference Figure 4 As shown, in some embodiments, the power adapter 21 includes: a rectifier circuit 211 , a coupling circuit 212 and an interface module 213 .

[0059] The rectifier circuit 211 is configured to rectify the power provided by the power supply circuit 300 into the rated voltage of the screen sound board 22, and provide the rectified power to the screen sound board 22 through the interface module 213 to power the screen sound board 22;

[0060] The coupling circuit 212 is configured to couple the analog audio signal from the power supply circuit 300, and provide the coupled analog audio signal to the screen sound board 22 through the interface module 213, so that the screen sound board 22 makes sound based on the analog audio signal.

[0061] In some embodiments, the input of the rectifier circuit 211 (power provided by the power supply circuit) is 220V AC, and the input and output of the rectifier circuit 211 are 19V DC.

[0062] In some embodiments, the interface module 214 includes: a 19V DC interface, a GND interface, a TRX+ interface, and a TRX- interface.

[0063] Reference Figure 5 As shown, in some embodiments, the coupling circuit 212 includes: a first coupling transformer L1 composed of a primary coil 51 and a secondary coil 52, a first filter capacitor C1 and a second filter capacitor C2; the first filter capacitor C1 and the second filter capacitor C2 are respectively arranged at both ends of the secondary coil 62, and the cutoff frequency of the first coupling circuit 212 is greater than the working frequency of the power supply circuit 300 and less than the first frequency band.

[0064] Since the cutoff frequency of the first coupling circuit is greater than the power frequency of the power supply circuit and less than the first frequency band, the first coupling circuit can couple the analog audio signal from the power supply circuit and filter out the power frequency component therein.

[0065] In some embodiments, the power frequency of the power supply circuit 300 is 50 Hz, the first frequency band is [3 MHz, 5.5 MHz], and the cutoff frequency of the first coupling circuit is 60 Hz.

[0066] In some embodiments, the inductance of the primary coil 51 of the first coupling transformer L1 is 1.5 mH, and the turns ratio of the primary coil 51 to the secondary coil 52 is 1:1.

[0067] In some embodiments, the capacitance of the first filter capacitor C1 and the second filter capacitor C2 is 10nF, and the rated voltage of the first filter capacitor C1 and the second filter capacitor C2 is 220V.

[0068] Reference Figure 6 As shown, in some embodiments, the screen sound board 22 includes: a first bandpass filter 221, a second modem chip 222, a power amplifier 223 corresponding to each channel (a first power amplifier, a second power amplifier, ..., an Nth power amplifier), a plurality of vibrators 220 (vibrator 1, vibrator 2, ..., vibrator n) arranged in the screen sound board, a power supply circuit 224 and an interface module 225.

[0069] Among them, the first bandpass filter 221 is configured to filter the analog audio signal coupled by the power adapter 21. The second modulation and demodulation chip 223 is configured to demodulate the analog audio signal after filtering to obtain the audio data of the at least one channel; the power amplifier 223 corresponding to each channel is used to amplify the audio data of the corresponding channel, and transmit the amplified audio data to the vibrator corresponding to each channel. The power circuit 224 is connected to the power adapter 21 through the interface module 225, and is used to power other devices in the screen sound board 22 through the rectified power of the power adapter 21. The power adapter 21 outputs the coupled analog audio signal to the screen sound board 22 through the interface module 225.

[0070] Reference Figure 7 As shown, in some embodiments, the first bandpass filter 221 is a third-order bandpass Butterworth filter composed of a first resistor R1, a first capacitor C1, a first inductor L1, a second resistor R2, a second capacitor C2, a second inductor L2, a third inductor L3, a third capacitor C3, a fourth inductor L4, a fifth inductor L5, a fourth capacitor C4 and a fifth capacitor C5. Wherein, the first resistor R1, the first capacitor C1, and the first inductor L1 are sequentially connected in series between the first node a and the first input terminal Input1, the second resistor R2, the second capacitor C2, and the second inductor L2 are sequentially connected in series between the second node b and the second input terminal Input2, the third capacitor C3 and the third inductor L3 are connected to the first node a and the second node b respectively, the fourth inductor L4 and the fourth capacitor C4 are sequentially connected in series between the first node a and the first output terminal Output1, and the fifth inductor L5 and the third capacitor C5 are sequentially connected in series between the second node b and the second output terminal Output2.

[0071] In some embodiments, the 3 dB bandwidth of the first bandpass filter 221 is 2.5 MHz, and the in-band flatness is 1 dB.

[0072] In some embodiments, the second modem chip 222 may be a G.hn chip. After receiving the analog audio signal coupled by the power adapter 21, the second modem chip 222 demodulates the analog audio signal into audio data of at least one channel in the G.hn protocol data format, performs format conversion on the audio data of at least one channel in the G.hn protocol data format, and inputs the audio data of each channel after format conversion into the power amplifier corresponding to each channel.

[0073] The way in which the second modem chip 222 demodulates the analog audio data is the inverse process of the way in which the first modem chip 111 modulates the audio data of at least one channel. For example, if the first modem chip 111 performs OFMD modulation on the audio data of at least one channel, the second modem chip 222 performs OFMD demodulation on the analog audio data.

[0074] In some embodiments, the second modem chip 222 can output the audio data of at least one channel obtained by demodulation through an integrated circuit internal audio bus (Inter-IC Sound, I2S). Figure 7 In the example, the second modem chip 222 outputs the audio data of each channel to the power amplifier corresponding to each channel through I2S1, I2S2, ..., I2Sn.

[0075] In some embodiments, the interface module 225 includes: a 19V DC interface, a GND interface, a TRX+ interface, and a TRX- interface. Each interface of the interface module 225 is connected to a corresponding interface of the power adapter 21 via a twisted pair electronic wire. Connecting each interface of the screen sound board 22 with each interface of the power adapter 21 via a twisted pair electronic wire can eliminate industrial mode interference.

[0076] The power supply circuit in the embodiment of the present application refers to a circuit that provides power to the laser TV (including: a circuit that provides power to the host and screen of the laser TV). The power supply circuit is part of the power system. Since the host and screen of the laser TV are generally powered by the same power system, the host and screen of the laser TV can also be understood to be electrically connected through the power system. Therefore, the power supply circuit in the embodiment of the present application transmits signals between the host and screen of the laser TV. In addition, since the power supply circuit is a circuit that both the host and screen of the laser TV must be connected to, the transmission of signals between the host and screen of the laser TV through the power supply circuit will not increase the wired or wireless lines between the host and screen of the laser TV.

[0077] The laser TV provided in the embodiment of the present application includes: a host and a screen; the host includes: a main board and a power board; the screen includes: a power adapter, a screen sound board and a plurality of vibrators arranged in the screen sound board; the power board is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the host; the power adapter is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the screen; the main board is configured to obtain audio data of at least one channel and modulate the audio data of at least one channel into an analog audio signal of a first frequency band; the power board is also configured to send the analog audio signal to the power supply circuit; the power adapter is also configured to couple the analog audio signal from the power supply circuit; the screen sound board is configured to demodulate the analog audio signal coupled by the power adapter to obtain the audio data of the at least one channel, and drive at least one of the plurality of vibrators to sound based on the audio data of the at least one channel. Since the transmission paths of the audio data of each channel of the laser TV provided in the embodiment of the present application are, in sequence, the main board, the power board, the power line, the power adapter, the screen sound board, and a plurality of vibrators arranged in the screen sound board, the embodiment of the present application can transmit the audio data of each channel between the host and the screen through the power supply circuit for providing power to the host and the screen, thereby avoiding connecting audio cables between the host and the screen and avoiding deploying wireless transceiver modules in the host and the screen. Therefore, the embodiment of the present application can enable the laser TV to support multi-channels while avoiding connecting multiple audio cables between the host and the screen and avoiding deploying wireless transceiver modules in the host and the screen.

[0078] In some embodiments, the screen sound board 22 is further configured to obtain control information and modulate the control information into an analog control signal of a second frequency band; the power adapter 21 is further configured to send the analog control signal to the power supply circuit 300; the power board 12 is further configured to couple the analog control signal from the power supply circuit 300; the main board 11 is further configured to demodulate the analog control signal coupled by the power board 12 to obtain the control information, and perform sound control based on the control information.

[0079] In some embodiments, the control information may include control information such as the amount of channel data supported by the screen sound board 22, audio data reception confirmation information (ACK information), etc.

[0080] When the information includes the number of channels supported by the screen sound board, refer to Figure 8 As shown, in Figure 6On the basis of the screen sound board 22 shown, the screen sound board 22 also includes: a current detection amplifier 226 and a second operational amplifier 227 .

[0081] The screen sound board 22 is also configured to detect the current of the power amplifier 223 corresponding to each channel of the screen sound board 22 through the current detection amplifier 226, determine the number of channels supported by the screen sound board 22 according to the current of the power amplifier 223 corresponding to each channel; and linearly amplify the analog control signal through the second operational amplifier 226.

[0082] In some embodiments, the screen sound board 22 is specifically configured as follows: detecting the current of the power amplifier 223 corresponding to each channel through the current detection amplifier 226, and determining the number of channels supported by the screen sound board 22 according to the current of the power amplifier 223 corresponding to each channel; modulating the number of channels into an analog control signal of a second frequency band through a second modem chip 222, amplifying the analog control signal through a second operational amplifier 226, and outputting the amplified analog control signal to the power adapter 21 through an interface module 225.

[0083] Since the above-mentioned embodiment also detects the current of the power amplifier corresponding to each channel of the screen sound board through the current detection amplifier, determines the number of channels supported by the screen sound board according to the current of the power amplifier corresponding to each channel, and outputs the number of channels supported by the screen sound board to the mainboard through the power adapter, the power supply circuit, and the power board, the above-mentioned embodiment can enable the screen sound board to be used in combination with laser TV screens that support different numbers of channels, and avoid the channel data output by the mainboard being inconsistent with the channels supported by the screen sound board.

[0084] In some embodiments, the second frequency band is [3 MHz, 5.5 MHz]. That is, the second frequency band is the same as the second frequency band.

[0085] In some embodiments, the amplification factor of the second operational amplifier 227 is 10 times.

[0086] Reference Fig. 9 As shown, in Figure 3 On the basis of the power board 12 shown, the power board further includes: a second coupling circuit 123. The power board 12 is specifically configured to couple the analog control signal from the power supply circuit 300 through the second coupling circuit 123.

[0087] Reference Fig.10As shown, the second coupling circuit 123 includes: a second coupling transformer L2 composed of a primary coil 101 and a secondary coil 102, a third filter capacitor C3 and a fourth filter capacitor C4; the third filter capacitor C3 and the fourth filter capacitor C4 are respectively arranged at both ends of the secondary coil 102, and the cutoff frequency of the second coupling circuit L2 is greater than the power frequency of the power supply circuit and less than the second frequency band.

[0088] In some embodiments, the cutoff frequency of the second coupling circuit L2 is 60 Hz.

[0089] In some embodiments, the inductance of the primary coil 101 of the second coupling transformer L2 is 1.5 mH, and the turns ratio of the primary coil 101 to the secondary coil 102 is 1:1.

[0090] In some embodiments, the capacitance of the third filter capacitor C3 and the fourth filter capacitor C4 is 10nF, and the rated voltage of the third filter capacitor C3 and the fourth filter capacitor C4 is 220V.

[0091] Reference Fig.11 As shown, in Figure 2 Based on the main board 11 shown, the main board 11 also includes: a second bandpass filter 116; the main board 11 is also configured to filter the analog control signal through the second bandpass filter 116 before demodulating the analog control signal coupled to the power board 12.

[0092] In some embodiments, the second bandpass filter 116 may be a third-order bandpass Butterworth filter. The structure of the third-order bandpass Butterworth filter can be referred to Figure 7 To avoid repetition, detailed description is not given here.

[0093] Before demodulating the analog control signal coupled to the power board 12, filtering the analog control signal through the second bandpass filter 116 can filter out noise in the analog control signal, so that the first modulation and demodulation chip can demodulate a more accurate control signal.

[0094] In some embodiments, the second modem chip 222 may perform OFMD modulation on the control signal to obtain an analog differential signal corresponding to the control information, and the first modem chip 112 may perform OFMD demodulation on the analog differential signal corresponding to the control information to obtain the control information.

[0095] Some embodiments of the present application also provide a method for producing sound of a laser television, such as Figure 1AAs shown in Figure 1B, the laser TV includes: a host 100 and a screen 200; the host 100 includes: a main board 111 and a power board 112; the screen 200 includes: a power adapter 21, a screen sound board 22, and a plurality of vibrators 220 arranged in the screen sound board 22; the power board 113 is connected to the power supply circuit 300, and is used to rectify the power provided by the power supply circuit 300 to power the host 100; the power adapter 21 is connected to the power supply circuit 300, and is used to rectify the power provided by the power supply circuit 300 to power the screen 200. Fig.12 As shown, the sound generation method of the laser TV provided in the embodiment of the present application includes the following steps S121 to S124:

[0096] S121. Acquire audio data of at least one channel through the mainboard, and modulate the audio data of at least one channel into an analog audio signal of a first frequency band.

[0097] In some embodiments, modulating the audio data of the at least one channel into an analog audio signal in a first frequency band includes: modulating the audio data of the at least one channel into an analog differential signal based on OFMD technology.

[0098] S122. Send the analog audio signal to the power supply circuit through the power board.

[0099] That is, the analog audio signal obtained by modulating the audio data of the at least one channel by the mainboard is applied to the power supply circuit for transmission.

[0100] S123. Couple the analog audio signal from the power supply circuit via the power adapter.

[0101] It should be noted that, since the power supply circuit also transmits industrial frequency power, the coupling circuit needs to filter out the industrial frequency component in the power supply circuit when coupling the analog audio signal.

[0102] S124. Demodulate the analog audio signal coupled by the power adapter through the power adapter to obtain audio data of the at least one channel, and drive at least one of the multiple vibrators to produce sound based on the audio data of the at least one channel.

[0103] The laser TV to which the sound-generating method of the laser TV provided in the embodiment of the present application is applied comprises: a host and a screen; the host comprises: a main board and a power board; the screen comprises: a power adapter, a screen sound board and a plurality of vibrators arranged in the screen sound board; the power board is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the host; the power adapter is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the screen; the sound-generating method of the laser TV comprises: obtaining audio data of at least one channel through the main board, and modulating the audio data of the at least one channel into an analog audio signal of a first frequency band; sending the analog audio signal to the power supply circuit through the power board; coupling the analog audio signal from the power supply circuit through the power adapter; demodulating the analog audio signal coupled by the power adapter through the power adapter to obtain the audio data of the at least one channel, and driving at least one of the plurality of vibrators to generate sound based on the audio data of the at least one channel. Since the transmission paths of the audio data of each channel in the sound-generating method of the laser TV provided in the embodiment of the present application are, in sequence, the main board, the power board, the power line, the power adapter, the screen sound board, and a plurality of vibrators arranged in the screen sound board, the embodiment of the present application can transmit the audio data of each channel between the host and the screen through a power supply circuit for providing power to the host and the screen, thereby avoiding connecting an audio line between the host and the screen and avoiding deploying a wireless transceiver module in the host and the screen. Therefore, the embodiment of the present application can enable the laser TV to support multiple channels while avoiding connecting multiple audio lines between the host and the screen and avoiding deploying a wireless transceiver module in the host and the screen.

[0104] In some embodiments, the sound generation method of the laser TV further includes: before sending the analog audio signal to the power supply circuit through the power board, processing the analog audio signal through the main board.

[0105] In some embodiments, the sound-generating method of the laser TV further includes: demodulating the analog audio signal coupled by the power adapter through the power adapter to obtain the audio data of the at least one channel, and filtering the analog audio signal coupled by the power adapter through the screen sound board.

[0106] In some embodiments, the sound-generating method of the laser TV also includes: acquiring control information through the screen sound board, and modulating the control information into an analog control signal of a second frequency band; sending the analog control signal to the power supply circuit through the power adapter; coupling the analog control signal from the power supply circuit through the power board; acquiring the control information by demodulating the analog control signal coupled by the power board, and performing sound control based on the control information.

[0107] In some embodiments, the control information includes the number of channels supported by the screen sound board.

[0108] In some embodiments, the sound generation method of the laser television further includes: amplifying the analog control signal before sending the analog control signal to the power supply circuit through the power adapter.

[0109] In some embodiments, the sound generation method of the laser TV further includes: filtering the analog control signal before demodulating the analog control signal coupled to the power board to obtain the control information.

[0110] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the sound-emitting method of the above-mentioned laser TV are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0111] The computer readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0112] The present application provides a computer program product, which includes a computer program. When the computer program is run on a computer, the computer implements the above-mentioned sound-generating method of the laser TV and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0113] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above discussion in some embodiments is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A laser television, characterized in that: include: Host and screen; The host comprises: a mainboard and a power board; the screen comprises: a power adapter, a screen sound board and a plurality of vibrators arranged in the screen sound board; The power board is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to supply power to the host; The power adapter is connected to the power supply circuit and is configured to rectify the power provided by the power supply circuit to power the screen; The mainboard is configured to obtain audio data of at least one channel and modulate the audio data of the at least one channel into an analog audio signal of a first frequency band; The power board is further configured to send the analog audio signal to the power supply circuit; The power adapter is further configured to couple the analog audio signal from the power supply circuit; The screen sound board is configured to demodulate the analog audio signal coupled by the power adapter to obtain audio data of the at least one channel, and drive at least one of the multiple vibrators to produce sound based on the audio data of the at least one channel.

2. The laser TV according to claim 1, characterized in that: The mainboard includes: a system chip, a first modulation and demodulation chip and a first operational amplifier; The system chip is configured to obtain audio encoding data and decode the audio encoding data to obtain audio data of the at least one channel; The first modem chip is configured to modulate the audio data of the at least one channel to obtain the analog audio signal; The first operational amplifier is configured to linearly amplify the analog audio signal and input the linearly amplified analog audio signal into the power adapter.

3. The laser TV according to claim 2, characterized in that: The first modulation and demodulation chip is specifically used to perform OFDM modulation on the audio data of the at least one channel to obtain an analog differential signal corresponding to the audio data of the at least one channel.

4. The laser TV according to claim 1, characterized in that: The power adapter is specifically configured to couple the analog audio signal from the power supply circuit through a first coupling circuit; Among them, the first coupling circuit includes: a first coupling transformer composed of a primary coil and a secondary coil, a first filter capacitor and a second filter capacitor; the first filter capacitor and the second filter capacitor are respectively arranged at both ends of the secondary coil, and the cutoff frequency of the first coupling circuit is greater than the working frequency of the power supply circuit and less than the first frequency band.

5. The laser TV according to claim 1, characterized in that: The screen sound board also includes: a first bandpass filter, a second modulation and demodulation chip, and a power amplifier corresponding to each channel; The first bandpass filter is configured to filter the analog audio signal coupled by the power adapter; The second modulation and demodulation chip is configured to demodulate the analog audio signal after filtering to obtain audio data of the at least one channel; The power amplifier corresponding to each channel is used to amplify the audio data of the corresponding channel and transmit the amplified audio data to the vibrator corresponding to each channel.

6. The laser TV according to any one of claims 1 to 5, characterized in that: The screen sound board is further configured to obtain control information and modulate the control information into an analog control signal of a second frequency band; The power adapter is further configured to send the analog control signal to the power supply circuit; The power board is further configured to couple the analog control signal from the power supply circuit; The main board is also configured to demodulate the analog control signal coupled to the power board to obtain the control information, and perform sound control based on the control information.

7. The laser TV according to claim 6, characterized in that: The control information includes the number of channels supported by the screen sound board; the screen sound board also includes: a current detection amplifier and a second operational amplifier; The screen sound board is also configured to detect the current of the power amplifier corresponding to each channel of the screen sound board through the current detection amplifier, determine the number of channels supported by the screen sound board according to the current of the power amplifier corresponding to each channel; and linearly amplify the analog control signal through the second operational amplifier.

8. The laser TV according to claim 6, characterized in that: The power board is specifically configured to couple the analog control signal from the power supply circuit through a second coupling circuit; Among them, the second coupling circuit includes: a second coupling transformer composed of a primary coil and a secondary coil, a third filter capacitor and a fourth filter capacitor; the third filter capacitor and the fourth filter capacitor are respectively arranged at both ends of the secondary coil, and the cutoff frequency of the second coupling circuit is greater than the power frequency of the power supply circuit and less than the second frequency band.

9. The laser TV according to claim 6, characterized in that: The main board also includes: a second bandpass filter; The main board is further configured to filter the analog control signal through the second bandpass filter before demodulating the analog control signal coupled to the power board.

10. A sound generation method for a laser television, characterized in that: The laser TV comprises: a host and a screen; the host comprises: a main board and a power board; the screen comprises: a power adapter, a screen sound board and a plurality of vibrators arranged in the screen sound board; the power board is connected to a power supply circuit for rectifying the power provided by the power supply circuit to power the host; the power adapter is connected to the power supply circuit for rectifying the power provided by the power supply circuit to power the screen; the method comprises: Acquire audio data of at least one channel through the mainboard, and modulate the audio data of the at least one channel into an analog audio signal of a first frequency band; sending the analog audio signal to the power supply circuit via the power board; coupling the analog audio signal from the power supply circuit via the power adapter; The analog audio signal coupled to the power adapter is demodulated by the power adapter to obtain audio data of the at least one channel, and at least one of the multiple vibrators is driven to produce sound based on the audio data of the at least one channel.

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