WO2021008134A1 - 一种显示装置 - Google Patents

一种显示装置 Download PDF

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Publication number
WO2021008134A1
WO2021008134A1 PCT/CN2020/075960 CN2020075960W WO2021008134A1 WO 2021008134 A1 WO2021008134 A1 WO 2021008134A1 CN 2020075960 W CN2020075960 W CN 2020075960W WO 2021008134 A1 WO2021008134 A1 WO 2021008134A1
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WO
WIPO (PCT)
Prior art keywords
channel
signal
data
iis
power amplifiers
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PCT/CN2020/075960
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English (en)
French (fr)
Inventor
孙学斌
杨洋
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海信视像科技股份有限公司
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Publication of WO2021008134A1 publication Critical patent/WO2021008134A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/602—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for digital sound signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic

Definitions

  • This application relates to the field of display devices, and in particular to a display device, audio equipment, and a multi-data channel IIS channel interface circuit.
  • the IIS interface can only transmit two channels, and the audio signal is already a multi-channel signal after decoding, so a normal single IIS interface cannot Supports the transmission of multi-channel signals, but can only use multiple sets of IIS interfaces to transmit multi-channel signals. Therefore, multi-channel signal transmission requires the number of IIS interfaces on the SOC chip of the display device to have certain requirements, and it will take up more With more IIS interface resources, the application of multi-channel technology in display devices is greatly restricted.
  • One purpose of this application is to propose a multi-channel IIS interface circuit, which aims to realize direct multi-channel transmission of multiple power amplifiers without changing the IIS interface protocol.
  • This application proposes a display device, including a main control board, multiple power amplifiers, and speakers connected to the power amplifiers; the main control board has a multi-data channel IIS channel interface circuit connected to the multiple power amplifiers;
  • the said multi-data channel IIS sound channel interface circuit includes:
  • a channel selection terminal for connecting to a plurality of the power amplifiers at the same time, and the channel selection terminal outputs a first channel switching signal and a second channel switching signal in time sharing;
  • a plurality of first data terminals at least two first data terminals of the plurality of first data terminals are connected to at least two of the plurality of power amplifiers in a one-to-one correspondence, wherein, when the channel selection terminal outputs the first When a channel switching signal is used, each of the at least two first data terminals outputs a channel signal to the corresponding power amplifier synchronously; when the channel selection terminal outputs a second channel switching signal, Each of the at least two first data terminals synchronously outputs another channel signal to the corresponding power amplifier.
  • the multi-data channel IIS sound channel interface circuit further includes:
  • each of the at least one second data terminal is connected to two power amplifiers of the plurality of power amplifiers, wherein, when the channel selection terminal outputs the first sound When the channel switching signal is selected, each second data terminal outputs a channel signal to the first of the two power amplifiers; when the channel selection terminal outputs a second channel switching signal, at least two Each of the first data terminals outputs another channel signal to the second power amplifier of the two power amplifiers.
  • the two-channel signals transmitted by one of the at least two first data terminals are a left channel signal and a right channel signal, respectively.
  • the channel selection terminal when the channel selection terminal outputs the first channel switching signal, at least two of the first data terminals both transmit left channel signals to at least two of the power amplifiers;
  • the channel selection terminal When the channel selection terminal outputs the second channel switching signal, at least two of the first data terminals both transmit the right channel signal to at least two of the power amplifiers.
  • the two-channel signal transmitted by one of the at least two first data terminals corresponds to the left channel signal and the right channel signal of the same type of channel signal.
  • the left channel signal and the right channel signal correspond to a left channel signal and a right channel signal
  • the left channel signal and the right channel signal correspond to a left surround channel signal and a right surround channel signal
  • the left channel signal and the right channel signal correspond to a left sky channel signal and a right sky channel signal.
  • one of the at least one second data terminal transmits a subwoofer channel signal to the first power amplifier, and transmits a center audio channel signal to the second power amplifier.
  • the multi-data channel IIS audio channel interface circuit and the audio channel output circuit multi-channel IIS interface circuit further have a clock terminal, and the clock terminal can be connected to a plurality of the power amplifiers at the same time.
  • an audio device which includes a main control board, a plurality of power amplifiers, and a plurality of speakers connected to the power amplifiers;
  • the main control board has a channel interface circuit with a multi-channel IIS interface;
  • the said multi-data channel IIS sound channel interface circuit includes:
  • a channel selection terminal for connecting to a plurality of the power amplifiers at the same time, and the channel selection terminal outputs a first channel switching signal and a second channel switching signal in time sharing;
  • a plurality of first data terminals at least two first data terminals of the plurality of first data terminals are connected to at least two of the plurality of power amplifiers in a one-to-one correspondence, wherein, when the channel selection terminal outputs the first When a channel switching signal is used, each of the at least two first data terminals outputs a channel signal to the corresponding power amplifier synchronously; when the channel selection terminal outputs a second channel switching signal, Each of the at least two first data terminals synchronously outputting another channel signal to the corresponding power amplifier;
  • the plurality of first data terminals of the multi-data channel IIS sound channel interface circuit are connected to at least two power amplifiers in a one-to-one correspondence, and each of the at least two second power amplifiers is connected to a speaker to communicate with the first
  • the channel signal transmitted by the data terminal is amplified, digital-to-analog converted, and then transmitted to the speaker.
  • a channel interface circuit of a multi-channel IIS interface is provided, and the channel interface circuit of the multi-channel IIS interface is the channel interface circuit of the multi-channel IIS interface in the above display device.
  • the channel selection end of the multi-channel IIS interface is connected to the channel switching end of each power amplifier, and at least two of the multiple first data ends of the multi-channel IIS interface are connected to the
  • the data input terminals of the power amplifiers are electrically connected in a one-to-one correspondence, so that each power amplifier can receive the same channel switching signal, and each power amplifier can receive two corresponding data terminals transmitted according to the channel switching signal.
  • FIG. 1 is a structural exploded view of an embodiment of a display device in the related art
  • FIG. 2 is a schematic diagram of the distribution positions of speakers corresponding to 8 channels in the 7.1 sound field mode in the display device of the embodiment of the present application;
  • FIG. 3 is a circuit block diagram of audio signal processing on the SOC of an embodiment of the present application.
  • Figure 4 is a waveform diagram of the output signals of each output terminal of the IIS interface in the related art
  • FIG. 5 is a diagram showing the correspondence between the signal output by the channel selection end of the multi-channel IIS channel interface and the output channel signal of the data end of the example of the present application;
  • FIG. 6 is a diagram showing the correspondence between the signal output by the channel selection terminal of the multi-channel IIS channel interface and the channel signal output by the data terminal according to another embodiment of the present application;
  • Figure 7 is a block diagram of the connection between the first data terminal and the power amplifier and the speaker
  • FIG. 8 is a block diagram of the connection between the second data terminal 11 and the power amplifier and the speaker;
  • Fig. 9 is a circuit connection diagram of a multi-channel IIS sound channel interface and 5 power amplifiers as an example of this application;
  • Figure 10 is a partial circuit diagram of an SOC chip interface circuit
  • Fig. 11 is a structural block diagram of each main module in the audio component of the embodiment of the present application.
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a whole; it can be Electrical connection can also be mutual communication; it can be directly connected or indirectly connected through an intermediate medium.
  • connection can be a fixed connection, a detachable connection, or a whole; it can be Electrical connection can also be mutual communication; it can be directly connected or indirectly connected through an intermediate medium.
  • plural means at least two, for example, two, three, etc., unless specifically defined otherwise.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships, such as A and/or B, which can indicate the existence of A alone, B alone, and both A and B.
  • the symbol “/” generally indicates that the associated objects are in an “or” relationship.
  • first and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features.
  • the display device includes a panel 1, a backlight assembly 2, a main board 3, a power supply board 4, a rear case 5, and a base 6.
  • the panel 1 is used to present images to the user;
  • the backlight assembly 2 is located under the panel 1, usually some optical components, used to supply sufficient brightness and uniformly distributed light sources, so that the panel 1 can display images normally, and the backlight assembly 2 also Including the backplane 201, the main board 3 and the power supply board 4 are arranged on the backplane 201, and some convex structures are usually stamped on the backplane 201.
  • the main board 3 and the power supply board 4 are fixed on the convex hulls by screws or hooks; the rear shell 5
  • the cover is arranged on the panel 1 to hide the display device components such as the backlight assembly 2, the main board 3, and the power supply board 4 to achieve a beautiful effect;
  • the base 6 is used to support the display device.
  • the display device usually has multiple power amplifiers and multiple speakers connected to the power amplifiers.
  • the power amplifier can be connected to the SOC (System on Chip) on the motherboard.
  • SOC System on Chip
  • the SOC outputs the audio signal to be played to the power amplifier, and the power amplifier amplifies the audio signal to drive the speaker to emit corresponding sound.
  • FIG. 1 only shows an ordinary TV with two speakers and two channels, while the display device involved in this application includes multiple channels and multiple speakers. According to the different channels emitted by the speakers, the speakers are correspondingly arranged in the housing. The position in the body is also different.
  • FIG. 2 shows a schematic diagram of the distribution positions of the speakers corresponding to the 8 channels on the display device 300.
  • L and R correspond to the speakers of the left and right channels
  • SL and SR correspond to the speakers of the left and right surround channels
  • FTL and FTR correspond to the speakers of the left and right sky channels respectively
  • SW corresponds to the speaker of the subwoofer channel
  • Center corresponds to the speaker of the center channel.
  • the FTL and FTR are correspondingly arranged in the housing of the display device 300 near the top of the display device 300, and the sky sound emitted by the two speakers is reflected by the top housing of the display device 300 to form a sky sound effect.
  • the speakers can also be arranged outside the housing of the display device 300, and distributed in the space where the housing is located, such as everywhere in the room, so as to obtain a better stereo sound effect.
  • the Dolby standard sound field modes include 5.1 channels, 7.1 channels and 10.1 channels.
  • the number of channels in these sound field modes is greater than two, that is, simultaneous multi-channel transmission is required.
  • Taking the 7.1 sound field as an example since an IIS interface can only transmit two channels, when 8 or more channels need to be transmitted, at least 4 ordinary IIS interfaces are required for transmission.
  • the SOC of the general display device 300 seldom can support 4 IIS signal outputs at the same time.
  • a multi-channel IIS interface is used to connect different power amplifiers.
  • the multi-channel IIS interface on the one hand, it can only output up to 8 channels at the same time, and more channel output cannot be achieved; on the other hand, due to the interface mismatch, the ordinary power amplifier cannot be connected to the multi-channel IIS interface. Therefore, the multi-channel IIS interface in the related technology must be connected to the power amplifier through the switch of the multi-channel sound card, which causes the multi-channel IIS interface to not be widely used.
  • the display device 300 proposed in the present application includes a multi-data channel IIS channel interface circuit 100, and the multi-data channel IIS channel interface circuit 100 can be provided on the main control board of the display device 300.
  • IIS is the abbreviation of Integrated Interchip Sound, that is, integrated audio interface.
  • the SOC chip on the main control board may have the multi-channel IIS channel interface.
  • the IIS channel interface mainly transmits three signals, which are channel selection signals, data signals, and clock signals.
  • the IIS channel interface performs data transmission with external devices according to the IIS bus protocol.
  • the ordinary IIS channel interface has only one data transmission end corresponding to the transmission of data signals.
  • the multi-channel IIS channel interface (also called IIS muiti) of this application has at least two data signal terminals, and the multi-channel IIS channel interface also supports the IIS protocol, so the multi-channel IIS channel interface is based on the data terminals it has.
  • the number is different, there are multiple channels to transmit sound signals, so a multi-channel IIS channel interface can simultaneously output the number of channels required for 5.1 channels and 7.1 sound field modes.
  • the SOC chip has a decoder 120, an audio processing circuit 110, and a multi-data IIS channel interface circuit 100 connected in sequence.
  • the decoder 120 is used to receive a sound source and decode the audio to form an audio signal; the sound source can be from Obtained from the network, or from the memory on the SOC.
  • the audio processing circuit 110 is used to optimize the components in the audio signal to improve the sound effect.
  • the multi-data channel IIS channel interface is used to receive the optimized audio signal of the audio processing circuit 110, and package and distribute the optimized audio signal into multiple sets of data to correspondingly output from multiple data channels.
  • the main signals involved in the transmission of the I2S bus interface are as follows:
  • the frame clock WS is used to switch the data of the left and right channels. For example, WS of "1" means that the data of the left channel is being transmitted, and WS of "0" means that the data of the right channel is being transmitted.
  • the frequency of WS is equal to the sampling frequency.
  • an I2S bus interface has two channels for transmitting audio data.
  • one channel of the I2S bus interface transmits audio data corresponding to the left channel, and the other channel transmits audio data corresponding to the right channel.
  • WS can change on the rising or falling edge of the serial clock BCLK, and the WS signal does not need to be symmetrical.
  • the highest bit of data always appears at the second bit clock BCLK pulse after the falling edge of the frame clock WS (that is, the start of a frame). That is, WS always changes one clock cycle before the highest bit transmission, so that the slave device can get the time synchronized with the serial data DATA being transmitted, and the receiving end can store the current command and clear space for the next command .
  • the signal transmission between the multi-data channel IIS channel interface circuit 100 and the power amplifier is taken as an example for description.
  • any audio processing device with an IIS channel interface can be applied to the multi-data channel IIS channel interface circuit 100 of the present application.
  • the ordinary power amplifier only supports the input of ordinary IIS channel interface. Therefore, the ordinary power amplifier has a channel switching terminal, a data input terminal, and a clock receiving terminal; therefore, a data input terminal of the power amplifier, in cooperation with the channel switching terminal, receives two channel signals.
  • FIG. 5 shows the correspondence between the signal output by the channel selection terminal WS and the channel signal output by the data terminal.
  • the multi-data channel IIS channel interface circuit 100 of the present application has a channel selection terminal WS, multiple data terminals (corresponding to D0 to D3 in FIG. 5), and a bit clock signal terminal BCLK.
  • the multi-data channel IIS channel interface circuit 100 has four data terminals (D0 to D3), and the output waveform of the clock terminal is not shown.
  • the channel selection terminal WS can alternately output high level and low level.
  • D0 When the channel selection terminal WS outputs a high level, D0 outputs the S1 channel signal, D1 outputs the S3 channel signal, D2 outputs the S5 channel signal, and D3 outputs the S7 channel signal; when the channel selection terminal WS outputs a low level, D0 outputs the S2 channel signal, D1 outputs the S4 channel signal, D2 outputs the S6 channel signal, and D3 outputs the S8 channel signal.
  • D0 When the channel selection terminal WS outputs a high level, D0 outputs the S2 channel signal, D1 outputs the S4 channel signal, D2 outputs the S6 channel signal, and D3 outputs the S8 channel signal.
  • the data terminal is divided into a first data terminal 10 and a second data terminal 11 according to the number of connected power amplifiers.
  • the multi-data channel IIS sound channel interface circuit 100 of the present application may have at least one first data terminal 10 and at least one second data terminal 11; or it may only have multiple first data terminals 10 without the first data terminal 10 Two data terminals 11; It is also possible to have only a plurality of second data terminals 11 without the first data terminal 10.
  • the multi-data channel IIS channel interface circuit 100 includes a channel selection terminal WS and a plurality of first data terminals 10.
  • the channel selection terminal WS is for connecting to a plurality of power amplifiers 20 at the same time.
  • the channel selection terminal WS outputs the first channel switching signal and the second channel switching signal in a time division; at least two of the first data terminals 10 are connected to at least two of the power amplifiers 20 in a one-to-one correspondence.
  • a power amplifier 20 is provided to a power amplifier 20.
  • each of the at least two first data terminals 10 synchronously outputs a channel signal to the corresponding power amplifier 20, and the power amplifier 20 generates the sound After the channel signal is processed, the speaker 30 is driven to send out; when the channel selection terminal WS outputs the second channel switching signal, each of the at least two first data terminals 10 synchronously outputs another channel signal to the corresponding The power amplifier 20 drives the speaker 31 to send out after processing the channel signal.
  • the first data terminal 10 is connected to the power amplifier 20 in a one-to-one correspondence, that is, two channel signals transmitted by one first data terminal 10 are correspondingly transmitted to the data input terminal of one power amplifier 20.
  • the channel switching terminal of the power amplifier 20 is used to receive the signal of the clock selection terminal of the multi-data channel IIS channel interface circuit 100, and can receive, process the channel signal according to the received signal of the clock selection terminal, and drive the corresponding speaker.
  • the multi-data channel IIS channel interface circuit 100 has three first data terminals 10 as an example.
  • the three first data terminals 10 are respectively D0, D1, D2, and D0, D1, D2.
  • Three power amplifiers 20 are respectively connected, corresponding to AMP1, AMP2, AMP3, and each power amplifier 20 is connected to two speakers.
  • D0 outputs the S1 channel signal to the data receiving terminal of the power amplifier AMP1
  • the power amplifier AMP1 receives the S1 channel signal, which undergoes amplification, digital-to-analog conversion, etc.
  • D1 transmits the S3 channel signal to the data receiving end of the power amplifier AMP2, and D2 transmits the S5 channel signal to the data receiving end of the power amplifier AMP3; as a multi-data channel IIS channel interface
  • D0 outputs the S2 channel signal to the data receiving end of the power amplifier AMP1
  • the power amplifier AMP1 receives the S2 channel signal, and drives another speaker to send out the corresponding signal after amplification and digital-to-analog conversion.
  • D1 transmits the S4 channel signal to the data receiving end of the power amplifier AMP2, and D2 transmits the S6 channel signal to the data receiving end of the power amplifier AMP3.
  • the multi-data channel IIS channel interface circuit 100 may further include at least one second data terminal 11, and each of the at least one second data terminal 11 is connected to Two power amplifiers 20 of the plurality of power amplifiers, wherein, when the channel selection terminal WS outputs the first channel switching signal, each second data terminal 11 outputs a channel signal to the first power amplifier 21 of the two power amplifiers 20 When the channel selection terminal WS outputs the second channel switching signal, each of the at least two first data terminals 10 outputs another channel signal to the second power amplifier 22 of the two power amplifiers 20.
  • each power amplifier can only receive one channel signal transmitted by the second data terminal 11.
  • the multi-data channel IIS sound channel interface circuit 100 has a second data terminal 11 as an example.
  • the figure corresponds to D3.
  • the second data terminal D3 is connected to two power amplifiers, namely AMP4 and AMP5; each power amplifier 21 corresponds to a speaker connected.
  • the channel selection terminal WS of the multi-data channel IIS channel interface circuit 100 outputs a high level
  • D3 outputs the S7 channel signal to the power amplifier AMP4
  • the power amplifier AMP4 receives the S7 channel signal, which is then amplified and processed by digital-to-analog conversion.
  • the connected speaker sends out; when the channel selection terminal WS of the multi-data channel IIS channel interface circuit 100 outputs a low level, D3 outputs the S8 channel signal to the power amplifier AMP5, and the power amplifier AMP5 receives the S2 channel signal, which undergoes amplification and digital-to-analog conversion Emitted from the speaker connected to it after processing.
  • the data terminal (collectively referred to as the first data terminal 10 and the second data terminal 11) of the multi-data channel IIS channel interface circuit 100 may be idle.
  • the multi-channel IIS interface when using the multi-channel IIS interface to transmit the 7.1 sound field mode, the multi-channel IIS interface on a certain type of SOC chip has 5 data transmission terminals (AOSDATA0 ⁇ AOSDATA4) and 1 bit clock terminal (AOBCK) , 1 system clock terminal (AOMCLK); therefore, only 4 data transmission terminals are needed to realize the transmission of 8 channels required by the 7.1 sound field mode. Therefore, one data terminal is free in the multi-channel IIS interface.
  • its multi-channel IIS interface has 4 data transmission terminals. Therefore, when transmitting the 7.1 sound field mode, all 4 data transmission terminals need to be used to realize 8-channel transmission.
  • the first channel switching signal and the second channel switching signal output by the channel selection terminal WS of the multi-data channel IIS channel interface circuit 100 can be high level and low level respectively, or can be electrical signals of other waveforms.
  • a triangular wave is used to form the first channel switching signal and the second channel switching signal. When the amplitude of the triangular wave signal is greater than a certain threshold, the signal segment formed is the first channel switching signal, and the signal segment formed less than the threshold is the second channel switching signal.
  • the channel selection terminal WS outputs a triangular wave signal, which is symmetrically distributed with a level signal with an amplitude of 0, so when the channel selection terminal WS outputs a level signal greater than 0, the corresponding signal terminal It is the first channel switching signal.
  • the corresponding signal terminal is the second channel switching signal.
  • the channel selection terminal WS of the multi-channel IIS interface is connected to the channel switching terminal of each power amplifier, and the multiple first data of the multi-channel IIS interface At least two of the terminals 10 are electrically connected to the data input terminals of the power amplifier in a one-to-one correspondence, so that each power amplifier 20 can receive the same channel switching signal, and each power amplifier can receive the corresponding channel switching signal according to the channel switching signal.
  • the two channels transmitted by one data terminal realize that the multiple channels sent by the multi-channel IIS interface can be directly received by multiple power amplifiers without the need for a conversion chip to transfer.
  • this application does not change the signal transmission mode of the multi-channel IIS interface, this application realizes the purpose of directly performing multi-channel transmission to the power amplifier without changing the IIS interface protocol.
  • the two-channel signals transmitted by one of the at least two first data terminals 10 are the left channel signal and the right channel signal, respectively. It can be understood that the left channel signal is amplified by the power amplifier 20, and the sound from the driving speaker is adapted to the human left ear hearing. The signal of the right channel is amplified by the power amplifier 20, and the sound from the driving speaker is adapted to the hearing of the human right ear.
  • the channel selection terminal WS when the channel selection terminal WS outputs the first channel switching signal, at least two first data terminals 10 both transmit the left channel signal and at least two power amplifiers 20; when the channel selection terminal WS outputs the first channel switching signal When the two-channel signal is switched, at least two first data terminals 10 both transmit signals of the right channel at least two power amplifiers 20.
  • the channel types include base channel, surround channel, sky channel, and the like.
  • the left channel signal corresponds to the left channel, left surround channel, left sky channel, etc.; correspondingly, the right channel signal corresponds to the right channel, right surround channel, right sky channel, etc.
  • the channel selection terminal WS outputs the first channel switching signal
  • the channels transmitted by the at least two first data terminals 10 are the left channel, the left surround channel, and the left sky channel.
  • the channel selection terminal WS outputs the second channel switching signal
  • the channels transmitted by the at least two first data terminals 10 are the right channel, the right surround channel, and the right sky channel.
  • the left channel and the right channel as the basic channel means that they do not need the cooperation of other types of channels to achieve sound transmission that can be recognized by the human ear.
  • the 2.0 sound field mode only has the left channel and the right channel.
  • the speaker that emits the sky channel is correspondingly arranged near the top of the display device 300 in the housing of the display device 300, and the sky sound emitted by the speaker passes through the top housing of the display device 300. Reflect to form a sky sound effect.
  • the two-channel signal transmitted by one of the at least two first data terminals 10 corresponds to the left channel signal and the right channel signal of the same type of channel signal.
  • the left channel signal and the right channel signal corresponding to the same type of channel signal. It should be noted that the type of channel signal is distinguished by the sound zone corresponding to the channel signal.
  • the sound zones corresponding to the left channel signal and the right channel signal of the same type of channel signal are roughly symmetrical, so as to correspond to the human's left and right ears respectively.
  • the left channel signal and the right channel signal of the same type of channel signal are the left channel signal and the right channel signal, or the left channel signal
  • the channel signal and the right channel signal correspond to the left surround channel signal and the right surround channel signal, or the left channel signal and the right channel signal correspond to the left sky channel signal and the right sky channel signal.
  • the subwoofer channel signal is sent to the first power amplifier 21, and the center audio channel signal is transmitted to the second power amplifier 22.
  • the multi-data channel IIS channel interface circuit 100 since the data terminal transmits the channel signal through serial transmission, the multi-data channel IIS channel interface circuit 100 also has a clock terminal BCLK, which corresponds to each bit of data of the channel signal, the clock terminal SCLK Both have 1 pulse.
  • the power amplifier has a clock receiving terminal, and the clock terminal SCLK is connected to the clock receiving terminals of multiple power amplifiers at the same time, so that the multi-data channel IIS channel interface circuit 100 and the power amplifier realize synchronous transmission of channel signals.
  • the current 10.1 sound field mode contains 11 channels. It is understandable that when a sound field mode with more than 11 channels appears, based on the application concept applied for in the embodiments of this application, it is still possible to use a larger number of IIS interfaces
  • the SOC chip at the data end and the corresponding number of power amplifiers are set to realize multi-channel transmission. Therefore, it can be said that the number of channels expected to be transmitted can be realized based on the application concept of this application.
  • the audio device includes a main control board, multiple power amplifiers, and multiple speakers connected to the power amplifiers; a multi-data channel IIS sound channel interface circuit 100 on the main control board.
  • the main control board has a main control chip or other audio processing chips, etc., and the main control chip or the audio processing chip may have a multi-data channel IIS sound channel interface circuit 100 on it.
  • the multiple first data terminals 10 of the multi-data channel IIS sound channel interface circuit 100 are connected to at least two power amplifiers 20 in a one-to-one correspondence. At least two power amplifiers are connected to two speakers corresponding to the two signals transmitted by the first data terminal 10. After the channel signal is amplified and processed by digital-to-analog conversion, it is sent out through two speakers.
  • the data terminal connected to the power amplifier 23 is the first data terminal 10; the power amplifier 23 is connected to the speaker 34 and the speaker 35, the data terminal connected to the power amplifier 24 is the second data terminal 11, and the power amplifier 24 is connected to the speaker 36.

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  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
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Abstract

本申请提供一种显示装置，包括声道选择端供同时连接到多个所述功放，所述声道选择端分时输出第一声道切换信号和第二声道切换信号；多个所述第一数据端的至少二个第一数据端一一对应连接到多个所述功放中的至少二个功放，当所述声道选择端输出第二声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出另一声道信号至对应的功放。

Description

一种显示装置
本专利申请要求于2019年7月12日提交的、申请号为201910630568.4的中国专利申请的优先权，该申请的全文以引用的方式并入本文中。
技术领域
本申请涉及显示装置领域，特别涉及一种显示装置、音响设备、以及多数据通道IIS声道接口电路。
背景技术
目前随着消费者对音质需求的提升，电视行业采用多声道播放音频逐渐成为一种趋势。在应用多声道播放普通的相关技术中，IIS接口由于接口类型限制，一个IIS接口只能传输两个声道，而音频信号经过解码后已经是多声道的信号，因此普通单个IIS接口无法支持对多声道信号的传输，而只能够使用多组IIS接口对多声道信号进行传输，因此多声道信号传输要求显示装置的SOC芯片上IIS接口数量具有一定的要求，并且会占用较多的IIS接口资源，因此多声道技术在显示装置中的应用受到极大的制约。
在所述背景技术部分申请的上述信息仅用于加强对本申请的背景的理解，因此它可以包括不构成对本领域普通技术人员已知的相关技术的信息。
申请内容
本申请的一个目的在于提出一种多通道IIS接口电路，旨在不改变IIS接口协议的基础上，实现直接对多个功放进行多声道传输。
为解决上述技术问题，本申请采用如下技术方案：
本申请提出一种显示装置，包括主控板，多个功放，以及与所述功放连接 的扬声器；所述主控板上具有与多个所述功放连接的多数据通道IIS声道接口电路；所述的多数据通道IIS声道接口电路包括：
声道选择端，供同时连接到多个所述功放，所述声道选择端分时输出第一声道切换信号和第二声道切换信号；
多个第一数据端，多个所述第一数据端的至少二个第一数据端一一对应连接到多个所述功放中的至少二个功放，其中，当所述声道选择端输出第一声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出一声道信号至对应的功放；当所述声道选择端输出第二声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出另一声道信号至对应的功放。
在一些实施例中，所述多数据通道IIS声道接口电路还包括：
至少一个第二数据端，至少一个所述第二数据端中的每个第二数据端分别连接到多个所述功放中的两个功放，其中，当所述声道选择端输出第一声道切换信号时，所述每个第二数据端输出一声道信号至所述两个功放中的第一功放；当所述声道选择端输出第二声道切换信号时，至少二个所述第一数据端中每个第一数据端输出另一声道信号至所述两个功放中的第二功放。
在一些实施例中，至少二个所述第一数据端中的一个第一数据端传输的两声道信号分别为左侧声道信号和右侧声道信号。
在一些实施例中，当声道选择端输出第一声道切换信号时，至少二个所述第一数据端均传输左侧声道信号至至少两个所述功放；
当声道选择端输出第二声道切换信号时，至少二个所述第一数据端均传输右侧声道信号至至少两个所述功放。
在一些实施例中，至少二个所述第一数据端中的一个第一数据端传输的两 声道信号对应于同类型声道信号的左侧声道信号和右侧声道信号。
在一些实施例中，所述左侧声道信号和右侧声道信号对应为左声道信号和右声道信号；或
所述左侧声道信号和右侧声道信号对应为左环绕声道信号和右环绕声道信号；或
所述左侧声道信号和右侧声道信号对应为左天空声道信号和右天空声道信号。
在一些实施例中，至少一个所述第二数据端中的一个第二数据端传输重低音声道信号至所述第一功放，且传输中置音声道信号至所述第二功放。
在一些实施例中，所述多数据通道IIS声道接口电路所述声道输出电路多通道IIS接口电路还具有时钟端，所述时钟端供同时连接到多个所述功放。
根据本申请的另一方面提出一种音响设备，包括主控板，多个功放，以及多个与所述功放连接的扬声器；所述主控板上具有多通道IIS接口的声道接口电路；所述的多数据通道IIS声道接口电路包括：
声道选择端，供同时连接到多个所述功放，所述声道选择端分时输出第一声道切换信号和第二声道切换信号；
多个第一数据端，多个所述第一数据端的至少二个第一数据端一一对应连接到多个所述功放中的至少二个功放，其中，当所述声道选择端输出第一声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出一声道信号至对应的功放；当所述声道选择端输出第二声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出另一声道信号至对应的功放；
所述多数据通道IIS声道接口电路的多个第一数据端与至少二个功放一一 对应连接，至少两个所述二功放中的每个功放均与扬声器连接，以对所述第一数据端传输的声道信号进行放大、数模转换处理后传输至所述扬声器。
根据本申请的另一方面提出一种多通道IIS接口的声道接口电路，所述多通道IIS接口的声道接口电路为上述显示装置中的多通道IIS接口的声道接口电路。
本申请提出的显示装置中，通过将多通道IIS接口的声道选择端和每个功放的声道切换端连接，且使多通道IIS接口的多个第一数据端中的至少两个与所述功放的数据输入端一一对应电连接，从而每个功放均能够接收到来自相同的声道切换信号，进而每个功放能够根据该声道切换信号接收到对应的一个数据端传输的两个声道，实现了多通道IIS接口发送的多个声道能够被多个功放直接接收，而不用转接多通道声卡进行转接；由于本申请没有更改多通道IIS接口的信号传输模式，因此本申请在不改变IIS接口协议的基础上，实现直接对功放进行多声道传输的目的。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术中显示装置的一实施例结构分解图；
图2是本申请实施例的显示装置中，7.1声场模式中8个声道所对应的扬声器的分布位置的示意图；
图3是本申请实施例SOC上关于音频信号处理的电路框图；
图4是相关技术中IIS接口的各个输出端输出信号的波形图；
图5是本申请示例的多通道IIS声道接口的声道选择端输出的信号与数据端输出声道信号的对应关系图；
图6是本申请另一实施例的多通道IIS声道接口的声道选择端输出的信号与数据端输出声道信号的对应关系图；
图7是第一数据端与功放、扬声器的连接框图；
图8是第二数据端11与功放、扬声器的连接框图；
图9是本申请示例的多通道IIS声道接口与5个功放的电路连接图；
图10是一SOC芯片接口电路的部分电路图；
图11是本申请实施例的音响组件内各主要模块的结构框图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施方式使得本申请将更加全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。附图仅为本申请的示意性图解，并非一定是按比例绘制。图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
此外，所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施方式中。在下面的描述中，提供许多具体细节从而给出对本申请的实施方式的充分理解。然而，本领域技术人员将意识到，可以实践本申请的技术方案而省略所述特定细节中的一个或更多，或者可以采用其它的方法、组元、装置、步骤等。在其它情况下，不详细示出或描述公知结构、方法、装置、实现、材料或者操作以避免喧宾夺主而使得本申请的各方面变得模糊。
在本申请中，除非另有明确的规定和限定，术语“相连”、“连接”等术语 应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是是电连接，也可以是互相通讯；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
此外，在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示单独存在A、单独存在B及同时存在A和B三种情况。符号“/”一般表示前后关联对象是一种“或”的关系。术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。
首先对显示装置的结构进行说明，如图1所示，显示装置包括面板1、背光组件2、主板3、电源板4、后壳5、基座6。其中，面板1用于给用户呈现画面；背光组件2位于面板1的下方，通常是一些光学组件，用于供应充足的亮度与分布均匀的光源，使面板1能正常显示影像，背光组件2还包括背板201，主板3和电源板4设置于背板201上，通常在背板201上冲压形成一些凸包结构，主板3和电源板4通过螺钉或者挂钩固定在凸包上；后壳5盖设在面板1上，以隐藏背光组件2、主板3以及电源板4等显示装置的零部件，起到美观的效果；底座6用于支撑显示装置。主板上具有SOC芯片。
显示装置中通常具有多个功放，以及多个与功放连接的扬声器。功放可以与主板上的SOC(System on Chip，系统芯片)连接，SOC输出将要播放的音频信号至功放，功放对该音频信号进行放大处理后，以驱动扬声器发出相应的 声音。
其中，图1仅仅示出两个扬声器、两个声道的普通电视，而本申请涉及的显示装置包括多个声道和多个扬声器，根据扬声器所发出的声道不同，对应设置扬声器在壳体内的位置也不同。
示例性的，当显示装置播放具有8个声道的5.1.2声场模式时，图2示出了8个声道所对应的扬声器在显示装置300上的分布位置的示意图。其中L、R分别对应左声道、右声道的扬声器；SL、SR分别对应左环绕声道和右环绕声道的扬声器；FTL、FTR分别对应左天空声道、右天空声道的扬声器；SW对应重低音声道的扬声器；Center对应为中置音声道的扬声器。
其中，FTL、FTR对应设置在靠近显示装置300壳体内靠近显示装置300顶部的地方，这两个扬声器发出的天空音通过显示装置300顶部壳体的反射，而形成天空音效。
当然扬声器还可以设置在显示装置300壳体的外侧，而分布于壳体所在的空间中，例如房间的各处，从而获得更好的音响立体效果。
杜比标准的声场模式包括有5.1声道、7.1声道以及10.1声道，这些声场模式的声道数量均大于2个，即需要同时进行多声道传输。在此以7.1声场为例说明，由于一个IIS接口只能传输两个声道，因此当需要传输8个及以上的声道时，则至少需要4个普通的IIS接口进行传输。然而一般显示装置300的SOC很少能够同时支持4路IIS信号输出。
在一些实施例中，采用多通道的IIS接口来对接不同的功放。而对于多通道IIS接口，一方面，只能够最多同时输出8个声道，更多的声道输出则无法实现；另一方面，由于普通功放由于接口不匹配而无法与多通道IIS接口连接，因而相 关技术中的多通道IIS接口必须要通过多通道声卡的转接才能够与功放的连接，从而导致了多通道IIS接口无法被普及使用。
为了解决这一问题，本申请提出的显示装置300中包括多数据通道IIS声道接口电路100，该多数据通道IIS声道接口电路100可以设置在显示装置300的主控板上。IIS是Integrated Interchip Sound的缩写，即集成音频接口。
在一具体实施例中，主控板上的SOC芯片可以具有该多通道IIS声道接口。IIS声道接口主要传输三个信号，分别是声道选择信号、数据信号、以及时钟信号，IIS声道接口根据IIS总线协议与外部设备进行数据传输。普通的IIS声道接口对应传输数据信号只有一个数据传输端。
而本申请的多通道IIS声道接口(也称为IIS muiti)具有至少两个数据信号端，并且多通道IIS声道接口同样支持IIS协议，因此多通道IIS声道接口根据其所具有数据端数量的不同，具有多个声道以传输声音信号，从而一个多通道IIS声道接口能够实现同时输出5.1声道、7.1声场模式所需要的声道数量。
如图3所示，SOC芯片上具有依次连接的解码器120，音频处理电路110以及多数据IIS声道接口电路100，解码器120用于接收音源，并将音频解码形成音频信号；音源可以从网络上获取，也可以从SOC上的存储器中获取。音频处理电路110用于对该音频信号中的分量进行优化，以提高音效。多数据通道IIS声道接口用于接收音频处理电路110优化后的音频信号，并将优化后的音频信号进行打包、分发成多组数据以对应从多个数据通道中输出。
如图4所示，I2S总线接口的在传输时主要涉及的信号如下：
(1)串行时钟BCLK，即位时钟，其对应数字音频信号的每一数据位，BCLK的频率＝2×采样频率×采样位数。例如，BCLK的频率 ＝2*48KHz*16bit＝1.536MHz。
(2)帧时钟WS，用于切换左右声道的数据。例如，WS为“1”表示正在传输的是左声道的数据，WS为“0”则表示正在传输的是右声道的数据。WS的频率等于采样频率。
(3)串行数据SDATA，用二进制补码表示的音频数据。
当然，在实际应用中，I2S总线接口在传输时涉及的信号还可以包括一些相关信号，例如：MCLK主时钟(即系统时钟)，目的是为了使系统间能够更好地同步，MCLK的频率是采样频率的256倍或384倍，例如48KHz*256＝12.288MHz。
结合图1所示，I2S总线接口在传输时，WS＝0(WS为低电平信号)，表示正在传输的是左声道(Left Channel)的数据。WS＝1(WS为高电平信号)，表示正在传输的是右声道(Right Channel)的数据。也就是说，一个I2S总线接口具有两个传输音频数据的通道。或者，也可以使WS＝1(WS为高电平信号)，表示正在传输的是左声道(Left Channel)的数据。WS＝0(WS为低电平信号)，表示正在传输的是右声道(Right Channel)的数据。当然，在实际应用中，这需要根据实际应用环境来设计确定，在此不作限定。
结合图1所示，I2S总线接口的一个通道传输左声道对应的音频数据，另一个通道传输右声道对应的音频数据。并且，WS可以在串行时钟BCLK的上升沿或者下降沿发生改变，并且WS信号不需要一定是对称的。一般，在从属装置端，数据的最高位总是出现在帧时钟WS的下降沿(也就是一帧开始)后的第2个位时钟BCLK的脉冲处。即WS总是在最高位传输前的一个时钟周期发生改变，这样可以使从属装置得到与被传输的串行数据DATA同步的时间，并 且使接收端存储当前的命令以及为下次的命令清除空间。
在下述实施例中，以多数据通道IIS声道接口电路100与功放之间的信号传输为例说明。当然，可以理解的是，只要是具有IIS声道接口的任何音频处理设备均可以适用于本申请的多数据通道IIS声道接口电路100。普通功放只支持普通的IIS声道接口的输入。因此普通功放具有一个声道切换端、一个数据输入端、以及时钟接收端；因此功放的一个数据输入端在与声道切换端的配合下，接收两路声道信号。
图5示出了声道选择端WS输出的信号与数据端输出声道信号的对应关系。本申请的多数据通道IIS声道接口电路100具有声道选择端WS、多个数据端(对应于图5中的D0～D3)，以及位时钟信号端BCLK。在该图中，多数据通道IIS声道接口电路100具有四个数据端(D0～D3)，时钟端的输出波形未图示。声道选择端WS能够交替输出高电平和低电平。
当声道选择端WS输出高电平时，D0输出S1声道信号，D1输出S3声道信号，D2输出S5声道信号，D3输出S7声道信号；当声道选择端WS输出低电平时，D0输出S2声道信号，D1输出S4声道信号，D2输出S6声道信号，D3输出S8声道信号。由此实现了一个声道选择端WS在一个周期，通过4个输出端输出8路声道信号的目的。
在本申请实施例中，数据端根据连接功放数量的不同，分为第一数据端10和第二数据端11。需要说明的是，本申请的多数据通道IIS声道接口电路100可以具有至少一个第一数据端10和至少一个第二数据端11；也可以仅仅具有多个第一数据端10，不具有第二数据端11；也可以仅仅具有多个第二数据端11，不具有第一数据端10。
请参阅图7，在一实施例中，多数据通道IIS声道接口电路100包括声道选择端WS和多个第一数据端10，声道选择端WS供同时连接到多个功放20，声道选择端WS分时输出第一声道切换信号和第二声道切换信号；多个第一数据端10的至少二个第一数据端10一一对应连接到多个功放20中的至少二个功放20。
其中，当声道选择端WS输出第一声道切换信号时，至少二个第一数据端10中每个第一数据端10同步输出一声道信号至对应的功放20，功放20将该声道信号处理后驱动扬声器30发出；当声道选择端WS输出第二声道切换信号时，至少二个第一数据端10中每个第一数据端10同步输出另一声道信号至对应的功放20，功放20将该声道信号处理后驱动扬声器31发出。
在该实施例中，第一数据端10是与功放20一一对应连接的，即一个第一数据端10所传输的两路声道信号对应传输至一个功放20的数据输入端。功放20的声道切换端用于接收多数据通道IIS声道接口电路100的时钟选择端的信号，并能够根据接收到的时钟选择端的信号进行声道信号的接收、处理、并驱动相应的扬声器。
请参阅图9，在此以多数据通道IIS声道接口电路100具有三个第一数据端10为例说明，三个第一数据端10分别为D0、D1、D2，且D0、D1、D2分别连接有三个功放20，对应为AMP1、AMP2、AMP3，每个功放20对应连接有两个扬声器。当多数据通道IIS声道接口电路100的声道选择端WS输出高电平时，D0输出S1声道信号至功放AMP1的数据接收端，功放AMP1接收S1声道信号，经过放大、数模转换等处理后驱动其中一个扬声器发出相应的声音；类似的，D1传输S3声道信号至功放AMP2的数据接收端，D2传输S5声道信 号至功放AMP3的数据接收端；当多数据通道IIS声道接口电路100的声道选择端WS输出低电平时，D0输出S2声道信号至功放AMP1的数据接收端，功放AMP1接收S2声道信号，经过放大、数模转换等处理后驱动另外一个扬声器发出相应的声音；类似的，D1传输S4声道信号至功放AMP2的数据接收端，D2传输S6声道信号至功放AMP3的数据接收端。
请参阅图8，在一些实施例中，多数据通道IIS声道接口电路100还可以包括至少一个第二数据端11，至少一个第二数据端11中的每个第二数据端11分别连接到多个功放中的两个功放20，其中，当声道选择端WS输出第一声道切换信号时，每个第二数据端11输出一声道信号至两个功放20中的第一功放21；当声道选择端WS输出第二声道切换信号时，至少二个第一数据端10中每个第一数据端10输出另一声道信号至两个功放20中的第二功放22。
在本实施例中，由于第二数据端11连接了两个功放，因此每个功放仅能够接收到第二数据端11所传输的一个声道信号。
在此以多数据通道IIS声道接口电路100具有一个第二数据端11为例说明，附图中对应为D3，第二数据端D3连接有两个功放，分别为AMP4和AMP5；每个功放21对应连接有一个扬声器。当多数据通道IIS声道接口电路100的声道选择端WS输出高电平时，D3输出S7声道信号至功放AMP4，功放AMP4接收S7声道信号，经过放大、数模转换等处理后从与其连接的扬声器发出；当多数据通道IIS声道接口电路100的声道选择端WS输出低电平时，D3输出S8声道信号至功放AMP5，功放AMP5接收S2声道信号，经过放大、数模转换等处理后从与其连接的扬声器发出。
在一些实施例中，多数据通道IIS声道接口电路100的数据端(第一数据端 10和第二数据端11的统称)可以有空闲。请参阅图10，例如在利用多通道IIS接口传输7.1声场模式时，某一型号的SOC芯片上的多通道IIS接口具有5个数据传输端(AOSDATA0～AOSDATA4)，1个位时钟端(AOBCK)，1个系统时钟端(AOMCLK)；一个因此仅仅需要用4个数据传输端，就可以实现传输7.1声场模式所需要的8个声道，因此多通道IIS接口中有一个数据端空闲。而例如海思811平台，其多通道IIS接口具有4个数据传输端，因此在传输7.1声场模式时，需要利用全部的4个数据传输端，以实现8个声道的传输。
多数据通道IIS声道接口电路100的声道选择端WS输出的第一声道切换信号和第二声道切换信号可以分别为高电平和低电平，也可以是其他波形的电信号，在一实施例中，利用三角波形成第一声道切换信号和第二声道切换信号。当三角波信号的幅值大于某一阈值所形成的信号段为第一声道切换信号，小于该阈值所形成的信号段为第二声道切换信号。
请参阅图6，其中声道选择端WS输出的为三角波信号，三角波是以幅值为0的电平信号对称分布，因此当声道选择端WS输出的电平信号大于0所对应的信号端为第一声道切换信号，当声道选择端WS输出的电平信号小于0所对应的信号端为第二声道切换信号。
本申请提出的多数据通道IIS声道接口电路100中，通过将多通道IIS接口的声道选择端WS和每个功放的声道切换端连接，且使多通道IIS接口的多个第一数据端10中的至少两个与功放的数据输入端一一对应电连接，从而每个功放20均能够接收到来自相同的声道切换信号，进而每个功放能够根据该声道切换信号接收到对应的一个数据端传输的两个声道，实现了多通道IIS接口发送的多个声道能够被多个功放直接接收，而不用转接芯片进行转接。
由于本申请没有更改多通道IIS接口的信号传输模式，因此本申请实现了在不改变IIS接口协议的基础上，实现直接对功放进行多声道传输的目的。
在一些实施例中，至少二个第一数据端10中的一个第一数据端10传输的两声道信号分别为左侧声道信号和右侧声道信号。可以理解的是，左侧声道信号经过功放20放大，并驱动扬声器发出的声音适应于人类左耳的听觉。右侧声道信号经过功放20放大，并驱动扬声器发出的声音适应于人类右耳的听觉。
在一些实施例中，当声道选择端WS输出第一声道切换信号时，至少二个第一数据端10均传输左侧声道信号至少两个功放20；当声道选择端WS输出第二声道切换信号时，至少二个第一数据端10均传输右侧声道信号至少两个功放20。
在一些实施例中，声道类型有基础声道、环绕声道、天空声道等类型。左侧声道信号对应为左声道、左环绕声道、左天空声道等；相应的，右侧声道信号对应为右声道、右环绕声道、右天空声道等。当声道选择端WS输出第一声道切换信号时，至少二个第一数据端10所传输的声道为左声道、左环绕声道、左天空声道等。当声道选择端WS输出第二声道切换信号时，至少二个第一数据端10所传输的声道为右声道、右环绕声道、右天空声道等。
左声道和右声道作为基础声道是指它们不需要其他类型声道的配合，就能够实现被人耳所能识别的声音传输，例如2.0声场模式就仅具有左声道和右声道。天空声道应用于显示装置300音频系统中时，发出天空声道的扬声器对应设置在靠近显示装置300壳体内靠近显示装置300顶部的地方，该扬声器发出的天空音通过显示装置300顶部壳体的反射，而形成天空音效。
在本实施例中，至少二个第一数据端10中的一个第一数据端10传输的两 声道信号对应于同类型声道信号的左侧声道信号和右侧声道信号。对应于同一类型声道信号的左侧声道信号和右侧声道信号。需要说明的是，声道信号的类型是该声道信号所对应产生的音区来进行区分的。
因此，同一类型声道信号的左侧声道信号和右侧声道信号对应产生的音区大致是呈左右对称的，以分别对应于人的左右耳听觉。这是由于同类型声道信号所需要的放大倍数，以及信号处理过程大致是相同的，因此通过同一功放20对同类型声道信号进行处理，能够使得该同类型声道信号具有大致相同的放大增益，从而通过扬声器发出后所获得的音区具有更好的左右对称性。
在一实施例中，同一类型声道信号的左侧声道信号和右侧声道信号述左侧声道信号和右侧声道信号是左声道信号和右声道信号，或左侧声道信号和右侧声道信号对应为左环绕声道信号和右环绕声道信号，或左侧声道信号和右侧声道信号对应为左天空声道信号和右天空声道信号。
在7.1声场模式中的8个声道中，有两个是重低音声道信号和中置音声道信号，在本实施例中，至少一个第二数据端11中的一个第二数据端11传输重低音声道信号至第一功放21，且传输中置音声道信号至第二功放22。
基于上述实施例，由于数据端通过串行传输方式进行声道信号的传输，因此多数据通道IIS声道接口电路100还具有时钟端BCLK，即对应声道信号的每一位数据，时钟端SCLK都有1个脉冲。
在一实施例中，功放具有时钟接收端，时钟端SCLK供同时连接到多个功放的时钟接收端，从而实现多数据通道IIS声道接口电路100与功放实现同步传输声道信号。
基于上述实施例可知，利用本申请提出的多数据通道IIS声道接口电路100， 仅需要三个第一数据端10、一个第二数据端11就可以实现传输7.1声场模式所需的8个声道。
可以理解的是，随着科技的发展，声场模式中可能会包含越来越多的声道，以实现更加逼真以及丰富的听觉效果。目前的10.1声场模式中包含11个声道，可以理解的是，当出现多于11声道的声场模式时，基于本申请实施例所申请的申请构思，仍然可以通过具有更多数量的IIS接口数据端的SOC芯片、以及设置对应数量的功放而实现对多声道的传输，因此可以说，基于本申请的申请构思可以实现所期望传输的声道数量。
本申请还提出一种音响设备，音响设备包括主控板，多个功放，以及多个与功放连接的扬声器；主控板上具有的多数据通道IIS声道接口电路100。可以理解的是，主控板上具有主控芯片或其他音频处理芯片等，该主控芯片或音频处理芯片上可以具有多数据通道IIS声道接口电路100。多数据通道IIS声道接口电路100的多个第一数据端10与至少二个功放20一一对应连接，至少二功放均对应与两个扬声器连接，以对第一数据端10传输的两声道信号进行放大以及数模转换处理后，分别经过两扬声器发出。
请参阅图11示出了音响设备内各主要模块的结构框图。在该图中，连接功放23的数据端为第一数据端10；功放23与扬声器34和扬声器35连接，连接功放24的数据端为第二数据端11，功放24与扬声器36连接。
虽然已参照几个典型实施方式描述了本申请，但应当理解，所用的术语是说明和示例性、而非限制性的术语。由于本申请能够以多种形式具体实施而不脱离申请的精神或实质，所以应当理解，上述实施方式不限于任何前述的细节， 而应在随附权利要求所限定的精神和范围内广泛地解释，因此落入权利要求或其等效范围内的全部变化和改型都应为随附权利要求所涵盖。

Claims (10)

  1. 一种显示装置，其特征在于，包括主控板，多个功放，以及与多个所述功放连接的扬声器；所述主控板上具有与多个所述功放连接的多数据通道IIS声道接口电路；所述多数据通道IIS声道接口电路包括：
    声道选择端，连接到多个所述功放，所述声道选择端分时输出第一声道切换信号和第二声道切换信号；
    多个第一数据端，多个所述第一数据端的至少二个第一数据端对应连接到多个所述功放中的至少二个功放，其中，当所述声道选择端输出第一声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出一声道信号至对应的功放；当所述声道选择端输出第二声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出另一声道信号至对应的功放。
  2. 根据权利要求1所述的显示装置，其特征在于，所述多数据通道IIS声道接口电路还包括：
    至少一个第二数据端，至少一个所述第二数据端中的每个第二数据端分别连接到多个所述功放中的两个功放，其中，当所述声道选择端输出第一声道切换信号时，所述每个第二数据端输出一声道信号至所述两个功放中的第一功放；当所述声道选择端输出第二声道切换信号时，至少二个所述第一数据端中每个第一数据端输出另一声道信号至两个所述功放中的第二功放。
  3. 根据权利要求1所述的显示装置，其特征在于，至少二个所述第一数据端中的一个第一数据端传输的两声道信号分别为左侧声道信号和右侧声道信号。
  4. 根据权利要求1所述的显示装置，其特征在于，当声道选择端输出第一声道切换信号时，至少二个所述第一数据端均传输左侧声道信号至至少两个所 述功放；
    当声道选择端输出第二声道切换信号时，至少二个所述第一数据端均传输右侧声道信号至至少两个所述功放。
  5. 根据权利要求1所述的显示装置，其特征在于，至少二个所述第一数据端中的一个第一数据端传输的两声道信号对应于同类型声道信号的左侧声道信号和右侧声道信号。
  6. 根据权利要求3所述的显示装置，其特征在于，所述左侧声道信号和右侧声道信号对应为左声道信号和右声道信号；或
    所述左侧声道信号和右侧声道信号对应为左环绕声道信号和右环绕声道信号；或
    所述左侧声道信号和右侧声道信号对应为左天空声道信号和右天空声道信号。
  7. 根据权利要求2所述的显示装置，其特征在于，至少一个所述第二数据端中的一个第二数据端传输重低音声道信号至所述第一功放，且传输中置音声道信号至所述第二功放。
  8. 根据权利要求1所述的显示装置，其特征在于，所述多数据通道IIS声道接口电路所述声道输出电路多通道IIS接口电路还具有时钟端，所述时钟端供同时连接到多个所述功放。
  9. 一种音响设备，其特征在于，包括主控板，多个功放，以及多个与所述功放连接的扬声器；所述主控板上具有与多个所述功放连接的多数据通道IIS声道接口电路，所述的多数据通道IIS声道接口电路包括：
    声道选择端，供同时连接到多个所述功放，所述声道选择端分时输出第一 声道切换信号和第二声道切换信号；
    多个第一数据端，多个所述第一数据端的至少二个第一数据端一一对应连接到多个所述功放中的至少二个功放，其中，当所述声道选择端输出第一声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出一声道信号至对应的功放；当所述声道选择端输出第二声道切换信号时，至少二个所述第一数据端中每个第一数据端同步输出另一声道信号至对应的功放；
    所述多数据通道IIS声道接口电路的多个第一数据端与至少二个功放一一对应连接，至少二所述功放中的每个功放均与扬声器连接，以对所述第一数据端传输的声道信号进行放大、数模转换处理后传输至所述扬声器。
  10. 一种多通道IIS接口的声道接口电路，其特征在于，所述多通道IIS接口的声道接口电路为如权利要求1至8中任意一项所述的显示装置中的多通道IIS接口的声道接口电路。
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