HDMI multipath sound box controller

Abstract

The utility model discloses an HDMI multipath sound box controller comprising a circuit board arranged in a housing, the circuit board is loaded with a single-chip microcomputer main control circuit, an HDMI hot plug detection circuit, an HDMI hot plug control circuit, and an HDMI interface circuit, the single-chip microcomputer main control circuit comprises a microcontroller U3, the HDMI hot plug detection circuit comprises a linear optical coupler U13, a linear optical coupler U20, a linear optical coupler U21, and a linear optical coupler U22, and the HDMI hot plug control circuit comprises a single-chip microcomputer main control circuit, an HDMI hot plug detection circuit, an HDMI hot plug control circuit, and an HDMI interface circuit. And the HDMI interface circuit comprises an HDMI input interface J24, an HDMI switching output interface J25, an HDMI switching output interface J26 and an HDMI switching output interface J15. The HDMI multi-channel sound box controller disclosed by the utility model has the beneficial effects that through the electrical connection and combination of functional circuits such as the single-chip microcomputer main control circuit, the HDMI hot plug detection circuit, the HDMI hot plug control circuit and the HDMI interface circuit, multi-channel HDMI output is realized, and 2-32-channel output can be supported at the same time at most.

Description

Technical Field

[0001] The present invention belongs to the field of control circuits, and particularly relates to an HDMI multi-channel speaker controller. Background Art

[0002] The invention patent application with the publication number of CN1627862A and the theme name of an audio system with multiple speakers and an automatic control method has an IPC classification number of H04R5 / 02. Its technical solution discloses that "the sound generated at the listener's position is collected by the microphones in each of the multiple speaker devices. The server device receives the audio signals collected from all the speaker devices and calculates the distance difference between the distance from the listener's position to the speaker device closest to the listener and the distances from the listener to each of the multiple speaker devices. When a speaker device emits sound, the server device can receive the collected audio signals emitted by each of the other speaker devices. The server device calculates the distance between the speaker devices between the speaker device that has emitted sound and each of the other speaker devices. The server device calculates the layout structure of the multiple speaker devices based on the distance difference and the distance between the speaker devices."

[0003] It can be seen that the above invention patent application has disclosed one of the control methods for multiple sound sources. However, the technical solution disclosed in the above invention patent application does not further disclose the circuit structure of the control circuit and needs to be further improved. Summary of the Invention

[0004] In view of the current situation of the prior art, the present invention overcomes the above defects and provides an HDMI multi-channel speaker controller.

[0005] The present invention adopts the following technical solutions. The HDMI multi-channel speaker controller includes a circuit board built in a housing. The circuit board is equipped with a single-chip microcomputer main control circuit, an HDMI hot plug detection circuit, an HDMI hot plug control circuit, and an HDMI interface circuit. The single-chip microcomputer main control circuit includes a microcontroller U3. The HDMI hot plug detection circuit includes linear optocouplers U13, U20, U21, and U22. The HDMI interface circuit includes an HDMI input interface J24, HDMI switching output interfaces J25, J26, and J15. The HDMI hot plug control circuit includes NPN transistors Q4, Q6, Q8, signal relays K1, K3, and K5, where:

[0006] The 1st terminal of the linear optocoupler U13 is electrically connected to the 18th terminal of the HDMI input interface J24, the 18th terminal of the HDMI switching output interface J25, the 18th terminal of the HDMI switching output interface J26, and the 18th terminal of the HDMI switching output interface J15 through the resistors R114, R95, R99, and R108 respectively; the 2nd terminal of the linear optocoupler U13 is electrically connected to the 19th terminal of the HDMI input interface J24 through the resistor R87; the 4th terminal of the linear optocoupler U13 is electrically connected to the 38th terminal of the microcontroller U3;

[0007] The 1st terminal of the linear optocoupler U20 is electrically connected to the 18th terminal of the HDMI switching output interface J25 and the 2nd terminal of the signal relay K1 through the resistor R116; the 4th terminal of the linear optocoupler U20 is electrically connected to the 4th terminal of the microcontroller U3; the 1st terminal of the linear optocoupler U21 is electrically connected to the 18th terminal of the HDMI switching output interface J26 and the 2nd terminal of the signal relay K3 through the resistor R118;

[0008] The 4th terminal of the linear optocoupler U21 is electrically connected to the 45th terminal of the microcontroller U3; the 1st terminal of the linear optocoupler U22 is electrically connected to the 18th terminal of the HDMI switching output interface J15 and the 2nd terminal of the signal relay K5 through the resistor R120.

[0009] As a preferred technical solution of the above technical solution, the circuit board also has an HDMI hot plug detection indicator circuit and an HDMI ARC signal switching control circuit on board. The HDMI hot plug detection indicator circuit includes the LED lights L6, L7, L8, D3, D4, and D5. The HDMI ARC signal switching control circuit includes the NPN transistors Q5, Q7, Q9, the signal relays K2, K4, and K6, where:

[0010] The positive electrode of the LED light L6 is connected to the 12V power supply through the resistor R96, and the negative electrode of the LED light L6 is connected to the collector of the NPN transistor Q4 and the 4th terminal of the signal relay K1 at the same time; the positive electrode of the LED light L7 is connected to the 12V power supply through the resistor R97, and the negative electrode of the LED light L7 is connected to the collector of the NPN transistor Q6 and the 4th terminal of the signal relay K3 at the same time; the positive electrode of the LED light L8 is connected to the 12V power supply through the resistor R98, and the negative electrode of the LED light L8 is connected to the collector of the NPN transistor Q8 and the 4th terminal of the signal relay K5 at the same time;

[0011] The positive electrode of the LED lamp D3 is connected to the 12V power supply through the resistor R85, and the negative electrode of the LED lamp D3 is simultaneously connected to the collector of the NPN transistor Q5 and the 4th terminal of the signal relay K2; the positive electrode of the LED lamp D4 is connected to the 12V power supply through the resistor R86, and the negative electrode of the LED lamp D4 is simultaneously connected to the collector of the NPN transistor Q7 and the 4th terminal of the signal relay K4; the positive electrode of the LED lamp D5 is connected to the 12V power supply through the resistor R88, and the negative electrode of the LED lamp D5 is simultaneously connected to the collector of the NPN transistor Q9 and the 4th terminal of the signal relay K6.

[0012] As a preferred technical solution of the above technical solution, the circuit board also has an HDMI CEC switching control circuit on board. The HDMI CEC switching control circuit includes an NPN transistor Q10, a signal relay K7, a wire-to-board connector J17, analog switches U6A, U6B, U6C, U6D, and an analog multiplexer U18, where:

[0013] The collector of the NPN transistor Q10 is electrically connected to the 4th terminal of the signal relay K7; the base of the NPN transistor Q10 is electrically connected to the 10th terminal of the microcontroller U3;

[0014] The 2nd terminal of the signal relay K7 is simultaneously electrically connected to the 4th terminal of the wire-to-board connector J17 and the 10th terminal of the analog switch U6D; the 5th terminal of the signal relay K7 is simultaneously electrically connected to the 13th terminal of the HDMI input interface J24 and the 13th terminal of the analog multiplexer U18; the 1st terminal of the wire-to-board connector J17 is simultaneously electrically connected to the 2nd terminal of the analog switch U6A, the 12th terminal of the analog multiplexer U18, and the 13th terminal of the HDMI switching output interface J25;

[0015] The 2nd terminal of the wire-to-board connector J17 is simultaneously electrically connected to the 3rd terminal of the analog switch U6B, the 14th terminal of the analog multiplexer U18, and the 13th terminal of the HDMI switching output interface J26; the 3rd terminal of the wire-to-board connector J17 is simultaneously electrically connected to the 9th terminal of the analog switch U6C, the 15th terminal of the analog multiplexer U18, and the 13th terminal of the HDMI switching output interface J15.

[0016] As a preferred technical solution of the above technical solution, the circuit board also has an HDMI DDC signal switching control circuit on board. The HDMI DDC signal switching control circuit includes an analog multiplexer U19, where:

[0017] The 12th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J25; the 14th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J26; the 15th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J15; the 1st terminal of the analog multiplexer U19 is electrically connected to the 16th terminal of the HDMI switching output interface J25; the 5th terminal of the analog multiplexer U19 is electrically connected to the 16th terminal of the HDMI switching output interface J26; the 2nd terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J15; the 13th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI input interface J24; the 3rd terminal of the analog multiplexer U19 is electrically connected to the 16th terminal of the HDMI input interface J24.

[0018] As a preferred technical solution of the above technical solution, the circuit board also has an on-board left-channel audio single-ended input to balanced output circuit, a right-channel audio single-ended input to balanced output circuit, a class-D power amplifier circuit, a 3.5mm analog input circuit, and a 3.5mm analog output circuit. The left-channel audio single-ended input to balanced output circuit includes an audio amplifier U8, and the right-channel audio single-ended input to balanced output circuit includes an audio amplifier U9. The class-D power amplifier circuit includes an audio power amplifier U10, and the 3.5mm analog input circuit includes a 3.5mm audio socket J19, where:

[0019] The 5th terminal of the audio amplifier U8 is electrically connected to the 5th terminal of the audio power amplifier U10 through the capacitor C69 and the resistor R58; the 4th terminal of the audio amplifier U8 is electrically connected to the 4th terminal of the audio power amplifier U10 through the capacitor C61 and the resistor R55; the 8th terminal of the audio amplifier U8 is sequentially connected to the 1st terminal of the 3.5mm audio socket J19 through the resistor R33, the resistor R32, the capacitor C34, and the resistor R31;

[0020] The 5th terminal of the audio amplifier U9 is electrically connected to the 11th terminal of the audio power amplifier U10 through the capacitor C79 and the resistor R82; the 4th terminal of the audio amplifier U9 is electrically connected to the 10th terminal of the audio power amplifier U10 through the capacitor C73 and the resistor R60; the 8th terminal of the audio amplifier U9 is sequentially connected to the 2nd terminal of the 3.5mm audio socket J19 through the resistor R36, the resistor R35, the capacitor C35, and the resistor R34.

[0021] The HDMI multi-channel speaker controller disclosed by the present invention has the beneficial effect that through the electrical connection combination of various functional circuits such as the single-chip microcomputer main control circuit, the HDMI hot plug detection circuit, the HDMI hot plug control circuit, and the HDMI interface circuit, multi-channel HDMI output is realized, and up to 2 to 32 channels of output can be supported simultaneously. Description of the Drawings

[0022] Figure 1 is the circuit schematic diagram of the single-chip microcomputer main control circuit of this application.

[0023] Figure 2 is the circuit schematic diagram of the reset circuit of this application.

[0024] Figure 3 is the circuit schematic diagram of the DCDC circuit of this application.

[0025] Figure 4 is the circuit schematic diagram of the UART to RS485 circuit of this application.

[0026] Figure 5 is the circuit schematic diagram of the LED strip control circuit of this application.

[0027] Figure 6 is the circuit schematic diagram of the UART to RS232 circuit of this application.

[0028] Figure 7 is the circuit schematic diagram of the level conversion circuit of this application.

[0029] Figure 8 is the partial circuit schematic diagram of the HDMI CEC switching control circuit of this application.

[0030] Figure 9 is the circuit schematic diagram of the optical fiber switching circuit (one input and three outputs) of this application.

[0031] Figure 10 is the circuit schematic diagram of the HDMI hot plug detection circuit of this application.

[0032] Figure 11 is the circuit schematic diagram of the HDMI hot plug detection indicator circuit of this application.

[0033] Figure 12 is the circuit schematic diagram of the reserved interface circuit of this application.

[0034] Figure 13 is the partial circuit schematic diagram of the HDMI CEC switching control circuit of this application.

[0035] Figure 14 is the circuit schematic diagram of the HDMI DDC signal switching control circuit of this application.

[0036] Figure 15 is the partial circuit schematic diagram of the HDMI CEC switching control circuit of this application.

[0037] Figure 16 is the circuit schematic diagram of the logic level conversion circuit of this application.

[0038] Figure 17 It is the circuit schematic diagram of the power amplifier output circuit of this application.

[0039] Figure 18 It is the circuit schematic diagram of the HDMI hot plug control circuit of this application.

[0040] Figure 19 It is the circuit schematic diagram of the HDMI ARC signal switching control circuit of this application.

[0041] Figure 20 It is the circuit schematic diagram of the HDMI interface circuit of this application.

[0042] Figure 21 It is the circuit schematic diagram of the 3.5mm analog input circuit of this application.

[0043] Figure 22 It is the circuit schematic diagram of the left channel audio single-ended input to balanced output circuit of this application.

[0044] Figure 23 It is the circuit schematic diagram of the right channel audio single-ended input to balanced output circuit of this application.

[0045] Figure 24 It is the partial circuit schematic diagram of the Class-D power amplifier circuit (150Wx2 analog input) of this application.

[0046] Figure 25 It is the partial circuit schematic diagram of the Class-D power amplifier circuit (150Wx2 analog input) of this application.

[0047] Figure 26 It is the perspective view of this application.

[0048] Figure 27 It is the perspective view of another angle of this application.

[0049] Figure 28 It is the top view of this application.

[0050] Figure 29 It is Figure 28 the partial enlarged view of area A in

[0051] Figure 30 It is Figure 28 the partial enlarged view of area B in

[0052] Figure 31 It is Figure 28 the partial enlarged view of area C in

[0053] Figure 32 It is Figure 28 the partial enlarged view of area D in

[0054] Figure 33 is Figure 26 A partial enlarged view of area E in

[0055] Figure 34 is Figure 27 A partial enlarged view of area F in

[0056] Reference numerals include: 100 - housing; Detailed implementation manners

[0057] The present invention discloses an HDMI multi - channel speaker controller. Below, in combination with a preferred embodiment (Embodiment 1), referring to the Figures 1 - 34 , the detailed implementation manners of the present invention will be further described.

[0058] Referring to the Figures 1 to 34 , Figures 1 to 25 respectively show the circuit structures of each functional circuit, Figures 26 to 34 respectively show the HDMI multi - channel speaker controller from different perspectives.

[0059] Embodiment 1.

[0060] Preferably, the HDMI multi - channel speaker controller includes a circuit board (not shown in the figure) built in the housing 100. The circuit board is equipped with a single - chip microcomputer main control circuit, an HDMI hot - plug detection circuit, an HDMI hot - plug control circuit, and an HDMI interface circuit. The single - chip microcomputer main control circuit includes a microcontroller U3. The HDMI hot - plug detection circuit includes linear optocouplers U13, U20, U21, and U22. The HDMI interface circuit includes an HDMI input interface J24, HDMI switching output interfaces J25, J26, and J15. The HDMI hot - plug control circuit includes NPN - type transistors Q4, Q6, Q8, signal relays K1, K3, and K5, where:

[0061] The 1 - st terminal of the linear optocoupler U13 is respectively electrically connected (correspondingly one - by - one) to the 18 - th terminal of the HDMI input interface J24, the 18 - th terminal of the HDMI switching output interface J25, the 18 - th terminal of the HDMI switching output interface J26, and the 18 - th terminal of the HDMI switching output interface J15 through resistors R114, R95, R99, and R108; the 2 - nd terminal of the linear optocoupler U13 is electrically connected to the 19 - th terminal of the HDMI input interface J24 through the resistor R87; the 4 - th terminal of the linear optocoupler U13 is electrically connected to the 38 - th terminal of the microcontroller U3;

[0062] The 1st terminal of the linear optocoupler U20 is electrically connected to the 18th terminal of the HDMI switch output interface J25 and the 2nd terminal of the signal relay K1 through the resistor R116; the 4th terminal of the linear optocoupler U20 is electrically connected to the 4th terminal of the microcontroller U3; the 1st terminal of the linear optocoupler U21 is electrically connected to the 18th terminal of the HDMI switch output interface J26 and the 2nd terminal of the signal relay K3 through the resistor R118;

[0063] the 4th terminal of the linear optocoupler U21 is electrically connected to the 45th terminal of the microcontroller U3; the 1st terminal of the linear optocoupler U22 is electrically connected to the 18th terminal of the HDMI switch output interface J15 and the 2nd terminal of the signal relay K5 through the resistor R120; enabling multiple HDMI outputs to be realized through the electrical connection combinations of various functional circuits such as the single-chip microcomputer main control circuit, the HDMI hot plug detection circuit, the HDMI hot plug control circuit, and the HDMI interface circuit, and supporting up to 2 to 32 outputs simultaneously.

[0064] Among them, the circuit board also has an HDMI hot plug detection indicator light circuit and an HDMI ARC signal switching control circuit on board. The HDMI hot plug detection indicator light circuit includes the LED lights L6, L7, L8, D3, D4, and D5. The HDMI ARC signal switching control circuit includes the NPN transistors Q5, Q7, Q9, the signal relays K2, K4, and K6, where:

[0065] The positive electrode of the LED light L6 is connected to the 12V power supply through the resistor R96, and the negative electrode of the LED light L6 is connected to the collector of the NPN transistor Q4 and the 4th terminal of the signal relay K1 at the same time; the positive electrode of the LED light L7 is connected to the 12V power supply through the resistor R97, and the negative electrode of the LED light L7 is connected to the collector of the NPN transistor Q6 and the 4th terminal of the signal relay K3 at the same time; the positive electrode of the LED light L8 is connected to the 12V power supply through the resistor R98, and the negative electrode of the LED light L8 is connected to the collector of the NPN transistor Q8 and the 4th terminal of the signal relay K5 at the same time;

[0066] The positive electrode of the LED light D3 is connected to the 12V power supply through the resistor R85, and the negative electrode of the LED light D3 is connected to the collector of the NPN transistor Q5 and the 4th terminal of the signal relay K2 at the same time; the positive electrode of the LED light D4 is connected to the 12V power supply through the resistor R86, and the negative electrode of the LED light D4 is connected to the collector of the NPN transistor Q7 and the 4th terminal of the signal relay K4 at the same time; the positive electrode of the LED light D5 is connected to the 12V power supply through the resistor R88, and the negative electrode of the LED light D5 is connected to the collector of the NPN transistor Q9 and the 4th terminal of the signal relay K6 at the same time.

[0067] Among them, the circuit board also has an HDMI CEC switching control circuit on board. The HDMI CEC switching control circuit includes an NPN transistor Q10, a signal relay K7, a wire-to-board connector J17, analog switches U6A, U6B, U6C, U6D, and an analog multiplexer U18, where:

[0068] The collector of the NPN transistor Q10 is electrically connected to the 4th terminal of the signal relay K7; the base of the NPN transistor Q10 is electrically connected to the 10th terminal of the microcontroller U3;

[0069] The 2nd terminal of the signal relay K7 is simultaneously electrically connected to the 4th terminal of the wire-to-board connector J17 and the 10th terminal of the analog switch U6D; the 5th terminal of the signal relay K7 is simultaneously electrically connected to the 13th terminal of the HDMI input interface J24 and the 13th terminal of the analog multiplexer U18;

[0070] The 1st terminal of the wire-to-board connector J17 is simultaneously electrically connected to the 2nd terminal of the analog switch U6A, the 12th terminal of the analog multiplexer U18, and the 13th terminal of the HDMI switching output interface J25; the 2nd terminal of the wire-to-board connector J17 is simultaneously electrically connected to the 3rd terminal of the analog switch U6B, the 14th terminal of the analog multiplexer U18, and the 13th terminal of the HDMI switching output interface J26; the 3rd terminal of the wire-to-board connector J17 is simultaneously electrically connected to the 9th terminal of the analog switch U6C, the 15th terminal of the analog multiplexer U18, and the 13th terminal of the HDMI switching output interface J15.

[0071] Among them, the circuit board also has an HDMI DDC signal switching control circuit on board. The HDMI DDC signal switching control circuit includes an analog multiplexer U19, where:

[0072] The 12th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J25; the 14th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J26; the 15th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J15; the 1st terminal of the analog multiplexer U19 is electrically connected to the 16th terminal of the HDMI switching output interface J25; the 5th terminal of the analog multiplexer U19 is electrically connected to the 16th terminal of the HDMI switching output interface J26; the 2nd terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI switching output interface J15; the 13th terminal of the analog multiplexer U19 is electrically connected to the 15th terminal of the HDMI input interface J24; the 3rd terminal of the analog multiplexer U19 is electrically connected to the 16th terminal of the HDMI input interface J24.

[0073] Among them, the circuit board also has on-board a left-channel audio single-ended input to balanced output circuit, a right-channel audio single-ended input to balanced output circuit, a class-D power amplifier circuit (150Wx2 analog input), a 3.5mm analog input circuit, a 3.5mm analog output circuit. The left-channel audio single-ended input to balanced output circuit includes audio amplifier U8, and the right-channel audio single-ended input to balanced output circuit includes audio amplifier U9. The class-D power amplifier circuit (150Wx2 analog input) includes audio power amplifier U10, and the 3.5mm analog input circuit includes 3.5mm audio socket J19, where:

[0074] The 5th terminal of audio amplifier U8 is electrically connected to the 5th terminal of audio power amplifier U10 through capacitor C69 and resistor R58; the 4th terminal of audio amplifier U8 is electrically connected to the 4th terminal of audio power amplifier U10 through capacitor C61 and resistor R55; the 8th terminal of audio amplifier U8 is sequentially electrically connected to the 1st terminal of 3.5mm audio socket J19 through resistor R33, resistor R32, capacitor C34 and resistor R31;

[0075] The 5th terminal of audio amplifier U9 is electrically connected to the 11th terminal of audio power amplifier U10 through capacitor C79 and resistor R82; the 4th terminal of audio amplifier U9 is electrically connected to the 10th terminal of audio power amplifier U10 through capacitor C73 and resistor R60; the 8th terminal of audio amplifier U9 is sequentially electrically connected to the 2nd terminal of 3.5mm audio socket J19 through resistor R36, resistor R35, capacitor C35 and resistor R34.

[0076] Among them, the circuit board also has on-board functional circuits such as a reset circuit, a DCDC circuit, a UART to RS485 circuit, an LED strip control circuit, a UART to RS232 circuit, a level conversion circuit, an optical fiber switching circuit (one input and three outputs), a reserved interface circuit, a logic level conversion circuit, a power amplifier output circuit, etc.

[0077] Among them, microcontroller U3 is preferably an STM32F051C8.

[0078] Among them, linear optocoupler U13 is preferably an EL817.

[0079] Among them, linear optocoupler U20 is preferably an EL817.

[0080] Among them, linear optocoupler U21 is preferably an EL817.

[0081] Among them, linear optocoupler U22 is preferably an EL817.

[0082] Among them, NPN transistor Q4 is preferably a BC847_SOT23.

[0083] Among them, the NPN transistor Q6 is preferably BC847_SOT23.

[0084] Among them, the NPN transistor Q8 is preferably BC847_SOT23.

[0085] Among them, the signal relay K1 is preferably G5V-1.

[0086] Among them, the signal relay K3 is preferably G5V-1.

[0087] Among them, the signal relay K5 is preferably G5V-1.

[0088] Among them, the NPN transistor Q5 is preferably BC847_SOT23.

[0089] Among them, the NPN transistor Q7 is preferably BC847_SOT23.

[0090] Among them, the NPN transistor Q9 is preferably BC847_SOT23.

[0091] Among them, the signal relay K2 is preferably G5V-1.

[0092] Among them, the signal relay K4 is preferably G5V-1.

[0093] Among them, the signal relay K6 is preferably G5V-1.

[0094] Among them, the NPN transistor Q10 is preferably BC847_SOT23.

[0095] Among them, the signal relay K7 is preferably G5V-1.

[0096] Among them, the wire-to-board connector J17 is preferably PH_5A.

[0097] Among them, the analog switch U6A is preferably 74HC4066_SOP14.

[0098] Among them, the analog switch U6B is preferably 74HC4066_SOP14.

[0099] Among them, the analog switch U6C is preferably 74HC4066_SOP14.

[0100] Among them, the analog switch U6D is preferably 74HC4066_SOP14.

[0101] Among them, the analog multiplexer U18 is preferably CD4052BCM.

[0102] Among them, the analog multiplexer U19 is preferably CD4052BCM.

[0103] Among them, the audio amplifier U8 preferably adopts OPA1632D.

[0104] Among them, the audio amplifier U9 preferably adopts OPA1632D.

[0105] Among them, the audio power amplifier U10 preferably adopts TAS5613APHD.

[0106] Among them, the 3.5mm audio socket J19 preferably adopts PJ-320A.

[0107] It is worth mentioning that the technical features such as the control method of multiple sound sources involved in this invention patent application should be regarded as the prior art. For the specific structures, working principles, possible control methods, and spatial arrangement methods of these technical features, conventional selections in the art can be adopted, and they should not be regarded as the inventive points of this invention patent. This invention patent will not be further specifically elaborated.

[0108] For those skilled in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An HDMI multi-channel speaker controller, comprising a circuit board built into a housing, characterized in that: The circuit board is equipped with a single-chip microcomputer main control circuit, an HDMI hot-plug detection circuit, an HDMI hot-plug control circuit, and an HDMI interface circuit. The single-chip microcomputer main control circuit includes a microcontroller U3. The HDMI hot-plug detection circuit includes a linear optocoupler U13, a linear optocoupler U20, a linear optocoupler U21, and a linear optocoupler U22. The HDMI interface circuit includes an HDMI input interface J24, an HDMI switching output interface J25, an HDMI switching output interface J26, and an HDMI switching output interface J15. The HDMI hot-plug control circuit includes an NPN transistor Q4, an NPN transistor Q6, an NPN transistor Q8, a signal relay K1, a signal relay K3, and a signal relay K5, wherein: Terminal 1 of the linear optocoupler U13 is electrically connected to terminal 18 of the HDMI input interface J24, terminal 18 of the HDMI switching output interface J25, terminal 18 of the HDMI switching output interface J26, and terminal 18 of the HDMI switching output interface J15 through resistors R114, R95, R99, and R108, respectively; terminal 2 of the linear optocoupler U13 is electrically connected to terminal 19 of the HDMI input interface J24 through resistor R87; terminal 4 of the linear optocoupler U13 is electrically connected to terminal 38 of the microcontroller U3; Terminal 1 of the linear optocoupler U20 is electrically connected to terminal 18 of the HDMI switching output interface J25 and terminal 2 of the signal relay K1 through resistor R116; terminal 4 of the linear optocoupler U20 is electrically connected to terminal 4 of the microcontroller U3; terminal 1 of the linear optocoupler U21 is electrically connected to terminal 18 of the HDMI switching output interface J26 and terminal 2 of the signal relay K3 through resistor R118; Terminal 4 of the linear optocoupler U21 is electrically connected to terminal 45 of the microcontroller U3; terminal 1 of the linear optocoupler U22 is electrically connected to terminal 18 of the HDMI switching output interface J15 and terminal 2 of the signal relay K5 through resistor R120.

2. The HDMI multi-channel speaker controller according to claim 1, characterized in that: The circuit board also carries an HDMI hot-plug detection indicator circuit and an HDMI ARC signal switching control circuit. The HDMI hot-plug detection indicator circuit includes LED lamps L6, L7, L8, D3, D4 and D5. The HDMI ARC signal switching control circuit includes NPN transistors Q5, Q7, Q9, signal relays K2, K4 and K6, wherein: The positive electrode of LED lamp L6 is connected to the 12V power supply through resistor R96, and the negative electrode of LED lamp L6 is connected to the collector of NPN transistor Q4 and terminal 4 of signal relay K1 at the same time; the positive electrode of LED lamp L7 is connected to the 12V power supply through resistor R97, and the negative electrode of LED lamp L7 is connected to the collector of NPN transistor Q6 and terminal 4 of signal relay K3 at the same time; the positive electrode of LED lamp L8 is connected to the 12V power supply through resistor R98, and the negative electrode of LED lamp L8 is connected to the collector of NPN transistor Q8 and terminal 4 of signal relay K5 at the same time; The positive pole of LED lamp D3 is connected to the 12V power supply through resistor R85, and the negative pole of LED lamp D3 is connected to the collector of NPN transistor Q5 and terminal 4 of signal relay K2 at the same time; the positive pole of LED lamp D4 is connected to the 12V power supply through resistor R86, and the negative pole of LED lamp D4 is connected to the collector of NPN transistor Q7 and terminal 4 of signal relay K4 at the same time; the positive pole of LED lamp D5 is connected to the 12V power supply through resistor R88, and the negative pole of LED lamp D5 is connected to the collector of NPN transistor Q9 and terminal 4 of signal relay K6 at the same time.

3. The HDMI multi-channel speaker controller according to claim 2, characterized in that: The circuit board also carries an HDMI CEC switching control circuit, which includes an NPN transistor Q10, a signal relay K7, a wire-to-board connector J17, an analog switch U6A, an analog switch U6B, an analog switch U6C, an analog switch U6D, and an analog multiplexer U18, wherein: The collector of the NPN transistor Q10 is electrically connected to the terminal 4 of the signal relay K7; the base of the NPN transistor Q10 is electrically connected to the terminal 10 of the microcontroller U3; Terminal 2 of the signal relay K7 is electrically connected to terminal 4 of the wire-to-board connector J17 and terminal 10 of the analog switch U6D at the same time; terminal 5 of the signal relay K7 is electrically connected to terminal 13 of the HDMI input interface J24 and terminal 13 of the analog multiplexer U18 at the same time; terminal 1 of the wire-to-board connector J17 is electrically connected to terminal 2 of the analog switch U6A, terminal 12 of the analog multiplexer U18 and terminal 13 of the HDMI switching output interface J25 at the same time; Terminal 2 of the wire-to-board connector J17 is electrically connected to terminal 3 of the analog switch U6B, terminal 14 of the analog multiplexer U18, and terminal 13 of the HDMI switching output interface J26; terminal 3 of the wire-to-board connector J17 is electrically connected to terminal 9 of the analog switch U6C, terminal 15 of the analog multiplexer U18, and terminal 13 of the HDMI switching output interface J15.

4. The HDMI multi-channel speaker controller according to claim 1, characterized in that: The circuit board also carries an HDMI DDC signal switching control circuit, which includes an analog multiplexer U19, wherein: Terminal 12 of the analog multiplexer U19 is electrically connected to terminal 15 of the HDMI switching output interface J25; terminal 14 of the analog multiplexer U19 is electrically connected to terminal 15 of the HDMI switching output interface J26; terminal 15 of the analog multiplexer U19 is electrically connected to terminal 15 of the HDMI switching output interface J15; terminal 1 of the analog multiplexer U19 is electrically connected to terminal 16 of the HDMI switching output interface J25; terminal 5 of the analog multiplexer U19 is electrically connected to terminal 16 of the HDMI switching output interface J26; terminal 2 of the analog multiplexer U19 is electrically connected to terminal 15 of the HDMI switching output interface J15; terminal 13 of the analog multiplexer U19 is electrically connected to terminal 15 of the HDMI input interface J24; terminal 3 of the analog multiplexer U19 is electrically connected to terminal 16 of the HDMI input interface J24.

5. The HDMI multi-channel speaker controller according to claim 1, characterized in that: The circuit board also carries a left channel audio single-ended input to balanced output circuit, a right channel audio single-ended input to balanced output circuit, a class D power amplifier circuit, a 3.5mm analog input circuit, and a 3.5mm analog output circuit. The left channel audio single-ended input to balanced output circuit audio amplifier U8, the right channel audio single-ended input to balanced output circuit audio amplifier U9, the class D power amplifier circuit includes an audio power amplifier U10, and the 3.5mm analog input circuit includes a 3.5mm audio socket J19, among which: Terminal 5 of the audio amplifier U8 is electrically connected to terminal 5 of the audio power amplifier U10 through capacitor C69 and resistor R58; terminal 4 of the audio amplifier U8 is electrically connected to terminal 4 of the audio power amplifier U10 through capacitor C61 and resistor R55; terminal 8 of the audio amplifier U8 is electrically connected to terminal 1 of the 3.5mm audio jack J19 through resistor R33, resistor R32, capacitor C34 and resistor R31 in sequence; Terminal 5 of the audio amplifier U9 is electrically connected to terminal 11 of the audio power amplifier U10 through capacitor C79 and resistor R82; terminal 4 of the audio amplifier U9 is electrically connected to terminal 10 of the audio power amplifier U10 through capacitor C73 and resistor R60; terminal 8 of the audio amplifier U9 is electrically connected to terminal 2 of the 3.5mm audio socket J19 through resistor R36, resistor R35, capacitor C35 and resistor R34 in sequence.

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