Audio system composed of speaker-enclosure planar array, and preparation method for audio system

Abstract

The present invention belongs to the technical field of electroacoustics in electronics, and relates to an audio system formed by a speaker-enclosure planar array, and a preparation method for the audio system. Different from the prior art, the present invention uses a plurality of small / -micro-aperture speakers to form a special planar array audio device, such that by using the plurality of small- / micro-aperture speakers, audio signals with frequencies of 20-120 Hz or even higher, which are typically cut off in small-aperture speaker systems, are caused, by means of synchronous superposition operation, to output powerful, clear and pure bass sound waves. Moreover, an algorithm for a linear digital filter is used to perform frequency division and surround sound processing on digital audio signals of the speakers without generating a phase shift. Therefore, a series of functional defects in conventional large-aperture subwoofers are overcome, thereby enabling the planar-array audio system to achieve a surround sound effect in a three-dimensional or two-dimensional space.

Description

An audio system consisting of a loudspeaker-speaker cabinet planar array and its manufacturing method.

[0001] This invention claims priority to two Chinese invention patent applications: one filed on November 18, 2024, with application number CN2024116667818, entitled "An audio system composed of a loudspeaker-speaker box planar array and its manufacturing method"; and the other filed on July 3, 2025, with application number CN2025109263388, also entitled "An audio system composed of a loudspeaker-speaker box planar array and its manufacturing method". Technical Field

[0002] This invention relates to an audio system consisting of a loudspeaker-speaker box planar array and its manufacturing method, belonging to the field of electroacoustic technology in electrical engineering. Background Technology

[0003] In existing audio systems, the larger the diameter of a moving-coil loudspeaker (also known as an electrodynamic loudspeaker, hereinafter referred to as a loudspeaker), the lower its resonant frequency Fo (Fs). For example, a 300mm diameter woofer can achieve a Fo of around 34Hz. With appropriate diaphragm, spider, surround, and stroke, it can output very powerful bass waves. A small-diameter loudspeaker, such as a 50mm diameter loudspeaker, typically has a resonant frequency Fo of around 150-200Hz. The mechanical waves it generates during vibration have very short wavelengths, making it impossible to output bass waves with such a small-diameter loudspeaker. Therefore, in integrated audio systems, to save energy and avoid damaging the loudspeakers, the 20-120Hz low-frequency output signal is often cut off by the crossover before being sent to the power amplifier for amplification and to drive the loudspeaker.

[0004] This invention differs from existing technologies in that it innovatively utilizes numerous small-diameter loudspeakers to form a special planar array sound system. By using numerous small-diameter loudspeakers, audio signals at frequencies of 20-120Hz (or even higher) that are usually cut off in small-diameter loudspeaker systems are synchronously superimposed to output powerful bass waves. This can improve a series of functional defects of traditional large-diameter loudspeakers and successfully create a new generation of three-dimensional or two-dimensional surround sound planar array sound systems. Technical issues

[0005] The first objective of this invention is to utilize the 20-120Hz or even higher frequency audio signals from small-diameter loudspeakers, which have long since lost their usability, to generate powerful and far purer bass waves than traditional large-diameter woofers through synchronous superposition. The second objective is to divide the small-diameter loudspeakers into basic sound units for different channels, and then drive these basic sound units in different areas through synchronous superposition to achieve an equivalent multi-channel audio system. For example, while all the small-diameter loudspeakers generate bass waves, they simultaneously drive the basic sound units belonging to different channels, such as the left front speaker, right front speaker, center speaker, left rear speaker, right rear speaker, and ceiling speaker, in a synchronous superposition manner, thereby achieving a surround sound effect in three-dimensional or two-dimensional space for a planar array audio system. Technical solutions

[0006] The objective of this invention is achieved as follows:

[0007] A sound system comprising a loudspeaker-speaker array and its manufacturing method thereof includes a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speakers, a frame, a panel, a base plate, a cover, flexible pads, a PCB board, fasteners, and other equipment. The loudspeakers are Ø38-63mm in diameter, and each loudspeaker is paired with a speaker enclosure of the same geometric dimensions. The speaker enclosure can be a sealed enclosure or an open enclosure. Each basic sound-generating unit of the planar array sound system consists of 1 to N loudspeakers. X basic sound-generating units are assembled into a planar array sound system configured around a flat-panel TV / laser projection TV using a frame, panel, base plate, cover, fasteners, and flexible pads made of rigid materials.

[0008] A panel made of a relatively thick rigid material is embedded and fixed in a closed outer frame with flexible padding, and the panel is connected and fixed to the frame with fasteners.

[0009] The panel is uniformly provided with (1 to N)×X through holes, and (1 to N)×X speaker enclosures made of rigid material are embedded in the through holes of the panel. The (1 to N)×X speakers are also embedded in the speaker enclosures of the panel, and an electrical connection relationship of 1 to N speakers is established between the basic sound-generating units of the planar array audio system.

[0010] According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speaker has a relatively flat sound pressure frequency response curve, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo through the algorithm of the linear digital filter, thereby obtaining the 20Hz-FL low-pass signal band and the FL-20kHz high-pass signal band. These are then converted into linear analog signals by the mixer and digital-to-analog converter (DAC), and then connected to the corresponding power amplifier for amplification. The basic sound units belonging to each channel are driven in a synchronous superposition mode, while the bass channel basic sound unit composed of all speakers is driven in a synchronous superposition mode.

[0011] According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speakers have large fluctuations and uneven sound pressure frequency response curves, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. At the same time, an appropriate crossover point FH is selected in the FO uplink frequency band. This yields the 20Hz-FL low-pass signal band, the FL-FH bandpass signal band, and the FH-20kHz high-pass signal band. These signals are then converted into analog signals without phase shift by a mixer and a digital-to-analog converter (DAC). After being amplified by the corresponding power amplifier, they drive the basic sound units belonging to each channel in a synchronous superposition mode. Simultaneously, the basic sound units of the bass channel, composed of all the speakers, are driven in a synchronous superposition mode.

[0012] A thin, rigid base plate is fixed inside the inner frame and connected to the frame using fasteners.

[0013] The outer position frame and the inner position frame have the same projected area and are connected by four rigid connecting rods of equal height at appropriate positions. Then, an angle steel base is connected to the bottom of the inner position frame. The frame and angle steel base of the planar array speaker are fixed to the indoor wall at an appropriate height by stainless steel expansion bolts that are pre-embedded in the wall.

[0014] The base plate of the inner position frame is equipped with a 300-1000W AC / DC power rectifier bridge, filter and heat dissipation device for the planar array speaker, an HDMI or USB interface and bus for the audio player, a wireless / Bluetooth input module for the audio digital wireless / Bluetooth output module, and a PCB board of several digital-to-analog converters (DACs) and several discrete power amplifier modules or a power amplifier IC integrated module mounted on the base plate of the planar array speaker.

[0015] The resulting algorithm can run on a local area network server, laptop, personal computer, flat-screen TV microcomputer, or other independent CPU system. Simultaneously, it uses several basic sound-generating units of the small-diameter loudspeaker—a planar array speaker—to synchronously superimpose and reproduce the 20Hz-20kHz audio signal of the digital music program source (including voice). This overcomes the shortcomings of traditional woofers, such as excessive inertia due to the excessive mass of the vibration system, severe phase delay distortion due to excessive inductance of the multi-layer voice coil, slow transient response of the cone, and muddy bass. It successfully creates a three-dimensional or two-dimensional surround sound planar array speaker system for flat-screen TVs / laser projection TVs with powerful bass below 120Hz, high resolution, and a very wide audio dynamic range.

[0016] A sound system consisting of a loudspeaker-speaker array and its manufacturing method, comprising a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speakers, a frame, a panel, a base plate, a cover, flexible pads, a PCB board, fasteners and other equipment, characterized in that: the loudspeakers are loudspeakers with a diameter of Ø38-100mm, each loudspeaker is equipped with a speaker enclosure of the same geometric dimensions, the speaker enclosure can be a sealed enclosure or an open enclosure, each basic sound-generating unit of the planar array sound system is composed of 1 to N loudspeakers, and X basic sound-generating units are assembled into several sets of planar array sound systems configured on the stage and surrounding walls and ceiling of a theater / conference hall using a frame, panel, base plate, cover, fasteners and flexible pads made of rigid materials;

[0017] A panel made of a relatively thick rigid material is embedded and fixed in a closed outer frame with flexible padding, and the panel is connected and fixed to the frame with fasteners.

[0018] The panel is uniformly provided with (1 to N)×X through holes, and (1 to N)×X speaker enclosures made of rigid material are embedded in the through holes of the panel. The (1 to N)×X speakers are also embedded in the speaker enclosures of the panel, and an electrical connection relationship of 1 to N speakers is established between the basic sound-generating units of the planar array audio system.

[0019] According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speaker has a relatively flat sound pressure frequency response curve, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo through the algorithm of the linear digital filter, thereby obtaining the 20Hz-FL low-pass signal band and the FL-20kHz high-pass signal band. These are then converted into analog signals without phase shift by the mixer and digital-to-analog converter (DAC), and then connected to the corresponding power amplifier for amplification. The basic sound units belonging to each channel are driven in a synchronous superposition mode, while the basic sound unit of the bass channel composed of all speakers is driven in a synchronous superposition mode.

[0020] According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speakers have large fluctuations and uneven sound pressure frequency response curves, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. At the same time, an appropriate crossover point FH is selected in the FO uplink frequency band. This yields the 20Hz-FL low-pass signal band, the FL-FH bandpass signal band, and the FH-20kHz high-pass signal band. These signals are then converted into analog signals without phase shift by a mixer and a digital-to-analog converter (DAC). After being amplified by the corresponding power amplifier, they drive the basic sound units belonging to each channel in a synchronous superposition mode. Simultaneously, the basic sound units of the bass channel, composed of all the speakers, are driven in a synchronous superposition mode.

[0021] A thin, rigid base plate is fixed inside the inner frame and connected to the frame using fasteners.

[0022] The outer position frame and the inner position frame have the same projected area and are connected by four rigid connecting rods of equal height at appropriate positions. Then, an angle steel base is connected to the bottom of the inner position frame. The frame and angle steel base of the planar array speaker are fixed to the indoor wall at an appropriate height by expansion bolts pre-embedded in the wall.

[0023] The base plate of the inner position frame is equipped with a 500-2000W AC / DC power rectifier bridge, filter and heat dissipation device for the planar array speaker, an HDMI or USB interface and bus for the audio player, a wireless / Bluetooth input module for the audio digital wireless / Bluetooth output module, and a PCB board of several digital-to-analog converters (DACs) and several discrete power amplifier modules or a power amplifier IC integrated module mounted on the base plate of the planar array speaker.

[0024] Several sets of planar array speakers and several sets of traditional ceiling speakers are installed around the stage / platform and at appropriate heights on the interior walls of cinemas or auditoriums. This constitutes a complete algorithm that can run on a local area network server, laptop, personal computer, or other independent CPU system. At the same time, the small-diameter dynamic loudspeaker-speaker planar array basic sound generation unit is synchronously superimposed to reproduce the 20Hz-20kHz audio signal of digital music program source (including voice). This overcomes the existing technical defects of traditional woofers, such as excessive inertia due to excessive mass of the vibration system, serious phase delay distortion due to excessive inductance of multi-layer voice coils, slow transient response speed of the cone, and muddy bass. It successfully produces a three-dimensional or two-dimensional surround sound planar array speaker system for cinemas / audio halls with powerful bass below 120Hz, high resolution, very wide audio dynamic range, and significantly improved reverberation time in buildings.

[0025] A sound system and its manufacturing method comprised of a loudspeaker-speaker array, comprising a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speaker enclosures, a frame, a panel, a base plate, a cover, flexible pads, a PCB board, fasteners, and other equipment. The loudspeakers are Ø8-25mm in diameter, and each loudspeaker is paired with a speaker enclosure of the same geometric dimensions. The speaker enclosure can be a sealed enclosure or an open enclosure. Each basic sound-generating unit of the planar array sound system consists of 1 to N loudspeakers-speaker enclosures. X basic sound-generating units are assembled into a planar array sound system by means of a panel, PCB board, stainless steel speaker enclosure, fasteners, and flexible pads installed in the cavity at the lower end of the computer monitor / all-in-one computer panel and the cavity in the recessed part of its back shell.

[0026] A rigid material panel is embedded and fixed in a pre-set cavity at the lower end of the computer monitor / all-in-one computer panel and the cavity of the recessed part of its back shell, and the panel is connected and fixed to the tongue and groove joint by fasteners;

[0027] The panel is uniformly provided with (1 to N)×X through holes, and (1 to N)×X speaker enclosures made of rigid material are embedded in the through holes of the panel. The (1 to N)×X speakers are also embedded in the speaker enclosures of the panel, and an electrical connection relationship of 1 to N speakers is established between the basic sound-generating units of the planar array audio system.

[0028] According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speaker has a relatively flat sound pressure frequency response curve, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo through the algorithm of the linear digital filter, thereby obtaining the 20Hz-FL low-pass signal band and the FL-20kHz high-pass signal band. These are then converted into analog signals without phase shift by the mixer and digital-to-analog converter (DAC), and then connected to the corresponding power amplifier for amplification. The basic sound units belonging to each channel are driven in a synchronous superposition mode, while the basic sound unit of the bass channel composed of all speakers is driven in a synchronous superposition mode.

[0029] The 30-100W AC / DC power rectifier bridge, filter, and heat dissipation device for the planar array audio system, as well as the USB or HDMI interface and bus that are compatible with the audio player, are all provided by the computer system. Several digital-to-analog converters (DACs) and several discrete power amplifier modules or a single power amplifier IC integrated module are installed on the PCB board or PCB expansion board of the computer monitor / all-in-one computer.

[0030] The resulting algorithm can run on a local area network server, laptop, personal computer, or other independent CPU system. Simultaneously, it uses the small-diameter loudspeaker—the basic sound-generating unit of the speaker planar array—to synchronously and superimpose the 20Hz-20kHz audio signal of the digital music program source (including voice). This overcomes the existing technical defect of traditional computer speakers lacking bass, and successfully creates a 2.1-5.1 channel planar array speaker system for computers with powerful bass below 120Hz, high resolution, and a very wide audio dynamic range.

[0031] An audio system consisting of a loudspeaker-speaker box planar array and its manufacturing method are characterized in that: the panel is an organic glass plate or stainless steel plate with an electroplated metal film on the outer surface, and the fitting connection between the panel and the frame and the flexible pad is coated with a removable flexible sealant.

[0032] A sound system consisting of a loudspeaker-speaker box planar array and its manufacturing method are characterized in that: the bottom of the speaker box mounted on the panel is provided with a pair of loudspeaker terminal blocks with significantly different positive and negative pole shapes, one end of which is connected to the positive or negative pole terminal of the loudspeaker embedded in the speaker box, and the other end of which is connected to X basic sound generating units and X power amplifiers respectively through connectors and audio wires.

[0033] A sound system consisting of a loudspeaker-speaker array and its manufacturing method, characterized in that: a stainless steel speaker cover plate is provided on the outermost part of the cavity of the computer monitor / all-in-one computer and is flush with the corresponding shell of the computer monitor / all-in-one computer.

[0034] A sound system and its manufacturing method comprised of a loudspeaker-speaker array, including a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speaker enclosures, a frame, a panel, a base plate, a housing, flexible pads, a PCB board, fasteners, and other equipment. The loudspeakers are Ø8-100mm in diameter, and each loudspeaker is paired with a speaker enclosure of the same geometric dimensions. The speaker enclosure can be a sealed enclosure or an open enclosure. Each basic sound-generating unit of the planar array sound system consists of 1 to N loudspeaker enclosures. X basic sound-generating units are assembled into a planar array sound system that operates close to a building wall, embedded in a wall, or embedded in the lower cavity of a computer monitor / all-in-one computer panel and its back cavity using a frame, panel, base plate, fasteners, and flexible pads made of rigid materials.

[0035] According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speakers have a relatively flat sound pressure frequency response curve, an appropriate crossover point FL is selected in the frequency band below the resonant frequency FO, and the linear digital filter is used to form a 20Hz-FL low-pass signal band with phase frequency and amplitude frequency characteristics that meet the requirements of linear crossover but do not produce phase shift. If necessary, the level of the 20Hz-FL low-pass signal band is equalized and boosted to an appropriate dB value without producing phase shift through an algorithm. Together with the FL-20kHz high-pass signal band, it is converted into a multi-channel audio analog signal without producing phase shift through a mixer and a digital-to-analog converter (DAC). The signal is then amplified by a power amplifier corresponding to the basic sound unit. The number of basic sound units driving different channels is selected so that they are synchronously superimposed and operated to achieve a balanced output level for each channel.

[0036] According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound-generating units belonging to different channels. When the speakers have large fluctuations and uneven sound pressure frequency response curves, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. Simultaneously, an appropriate crossover point FH is selected in the upward frequency band of Fo. This yields the 20Hz-FL low-pass signal band, the FL-FH high-pass signal band, and the FH-20kHz high-pass signal band. If necessary, further algorithms can be used... The 20Hz-FL low-pass signal band is boosted to an appropriate dB value without phase shift, or the FL-FH high-pass signal band and FH-20kHz high-pass signal band are boosted or attenuated to an appropriate dB value without phase shift. The signal is then converted into a multi-channel audio analog signal without phase shift by a mixer and a digital-to-analog converter (DAC). The signal is amplified by a power amplifier corresponding to the basic sound unit. The number of basic sound units driving different channels is selected so that they are synchronously superimposed to achieve a balanced output level for each channel.

[0037] This constitutes a complete algorithm that can run on a local area network server, laptop, personal computer, or independent CPU system. It uses the basic sound-generating units of the small-diameter loudspeaker—the planar array speaker—to synchronously superimpose and reproduce the 20Hz-20kHz audio signal of the digital music program source. It overcomes the existing technical defects of traditional woofers, such as excessive inertia due to the excessive mass of the vibration system, severe phase delay distortion due to the excessive inductance of the multi-layer voice coil, slow transient response of the cone, and muddy bass. It successfully prepares a three-dimensional or two-dimensional multi-channel planar array speaker system with powerful bass below 120Hz, high resolution, very wide audio dynamic range, and significantly improved defects such as excessive reverberation time of sound waves in buildings. Beneficial effects

[0038] 1. Overcoming the biases of traditional technology, by utilizing the 20-120Hz or even higher frequency audio signal output levels of small-diameter loudspeakers that have been cut off and discarded in an arrangement, the planar array loudspeakers can produce a very powerful and clear bass sound effect by operating in a synchronous superposition mode.

[0039] 2. Traditional large-diameter woofer vibration systems suffer from excessive weight, resulting in excessive inertia. The excessive inductance of multi-layer voice coils also causes severe phase delay distortion in the input / output audio signals.

[0040] 3. Practical experience has proven that the bass or sub-bass sound waves generated by the planar array sound system overcome the defects of traditional large-diameter loudspeakers, such as muddy bass and excessively long reverberation time caused by multiple reflections between the walls of a building. Its sound quality is powerful yet clear and pure, with higher resolution and fidelity. Attached Figure Description

[0041] Figure 1. Elevation and 3D view of the Ø50mm loudspeaker.

[0042] Figure 2. Elevation and 3D view of the Ø50mm loudspeaker sealed enclosure.

[0043] Figure 3. Plan view of the panel layout and left elevation of the planar array audio system.

[0044] Figure 4. Plan view of the base plate of the planar array sound system and schematic diagram of the left elevation.

[0045] Figure 5. Assembly diagram of the frame structure of the planar array audio system.

[0046] Figure 6. Schematic diagram of the enclosure structure of a planar array audio system.

[0047] Figure 7. Frequency response curve of acoustic pressure impedance of Ø50mm loudspeaker.

[0048] Figure 8. Low-pass filter curve of a linear digital filter.

[0049] Figure 9. Schematic diagram of the speaker distribution in each channel of a 5.1 channel planar array audio system.

[0050] Figure 10. Schematic diagram of the distribution of 5.1.4 channel speakers in a planar array audio system.

[0051] Figure 11. Schematic diagram of the left and right rear speaker distribution of the 5.1.4 channel planar array audio system.

[0052] Figure 12. Schematic diagram of the planar layout of Embodiment 1 of the planar array audio system.

[0053] Figure 13. Schematic diagram of the planar layout of Embodiment 2 of the planar array audio system.

[0054] Figure 14. Schematic diagram of the planar layout of embodiment 3 of the planar array audio system.

[0055] Figure 15. Schematic diagram of the planar layout of embodiment 4 of the planar array audio system.

[0056] Figure 16. Front elevation view of embodiment 5 of the planar array audio system.

[0057] Figure 17. Schematic diagram of the rear facade arrangement of embodiment 5 of the planar array audio system.

[0058] The correspondence between the main components and reference numerals of this invention:

[0059] 1: Speaker;

[0060] 2. Speaker;

[0061] 2-1: 5.1 channel left front channel speaker;

[0062] 2-2: 5.1 channel front right speaker;

[0063] 2-3: 5.1 channel rear left channel speaker;

[0064] 2-4: 5.1 channel rear right speaker;

[0065] 2-5: 5.1 channel center channel speaker;

[0066] 2-6: 5.1 channel subwoofer;

[0067] 3: Framework;

[0068] 4: Panel;

[0069] 5: Base plate

[0070] 6: DC power indicator light;

[0071] 7: USB interface;

[0072] 8: HDMI interface;

[0073] 9: Stainless steel angle / flat steel connecting rod;

[0074] 10: Removable sealant;

[0075] 11: Sound pressure level frequency response curve of a ￠50mm loudspeaker;

[0076] 12-1: Frame housing (side panels);

[0077] 12-2: Frame enclosure (top plate);

[0078] 13: Stainless steel angle iron base;

[0079] 14: Resonant frequency FO of a 50mm speaker;

[0080] 15: Crossover point FL for ￠50mm speaker;

[0081] 16: Crossover point FH for ￠50mm speaker;

[0082] 17: Heat dissipation holes in the casing;

[0083] 18; Flexible padding;

[0084] 20: AC power connector;

[0085] 21: AC / DC rectifier bridge, filter, and heat sink;

[0086] 22: Bluetooth input / output module;

[0087] 23: Analog-to-Digital Converter (ADC);

[0088] 24: Digital-to-Analog Converter (DAC);

[0089] 25: Power amplifier;

[0090] 26: Immersive / Surround Sound Chip;

[0091] 101: Planar array sound system;

[0092] 101-1: 5.1.4 channel left front channel speaker;

[0093] 101-2: 5.1.4 channel front right channel speaker;

[0094] 101-5: 5.1.4-channel center channel speaker;

[0095] 101-6: 5.1.4-channel subwoofer speaker;

[0096] 103: 5.1.4 channel rear left channel speaker;

[0097] 104: 5.1.4 channel rear right channel speaker;

[0098] 107: 5.1.4 channel ceiling speakers;

[0099] 108: 86-75 inch flat-screen TVs;

[0100] 109: Sofa chair;

[0101] 110: Wall;

[0102] 111: Laser projection TV screen;

[0103] 112: Laser projection television;

[0104] 201: Planar array sound system;

[0105] 202: Ceiling speaker;

[0106] 203: Escalator steps;

[0107] 204: Stage / Platform;

[0108] 205 Cinema / Great Hall;

[0109] 300: All-in-one computer / computer monitor; 301: All-in-one computer / computer monitor panel;

[0110] 302: Back cover of all-in-one computer / computer monitor;

[0111] 303: Cavity at the lower end of the panel of an all-in-one computer / computer monitor;

[0112] 304: Hollow panel at the bottom of the all-in-one computer / computer monitor panel;

[0113] 305: Cavity in the back shell of an all-in-one computer / computer monitor;

[0114] 306: Hollow panel on the back cover of an all-in-one computer / computer monitor;

[0115] 307: Stainless steel speaker enclosure. The best embodiment of the present invention

[0116] Figure 1 shows the elevation view and 3D view of the ￠50mm loudspeaker of the present invention. Component 1 is a neodymium iron boron internal magnet moving coil loudspeaker (hereinafter referred to as loudspeaker), with a cone support diameter of ￠52mm, a height of 32.5mm, a resonant frequency Fo=199Hz, a sensitivity of 80dB+ / 1m / 1W, and a DCR of 4 Ohm.

[0117] Figure 2 shows the elevation and 3D view of the sealed speaker enclosure of the ￠50mm loudspeaker of the present invention. The external dimensions of the speaker enclosure are: length × width × height = 60mm × 60mm × 65mm, and the volume of each speaker enclosure is approximately 0.2L.

[0118] Figure 3 shows the planar layout of the panel of the planar array audio system of the present invention and a schematic diagram of the left elevation.

[0119] As shown in Figure 3-a, this is a floor plan of a planar array audio system manufactured by the applicant using 2-inch speaker components that have been stockpiled for many years. Frame 3 consists of two rectangular frames with the same projected area, welded together using stainless steel angle bars, as shown in Figure 5-a. Four stainless steel angle bar connecting rods 9 of equal height are welded to the four corners of the two frames to connect them into a single unit, as shown in Figures 5-b and 5-c. An angle steel base 13, welded together from stainless steel angle bars, is welded to the inner frame as a single unit, as shown in Figures 5-b, 5-d, and 5-e. Furthermore, a suitable number of through holes (not shown in this invention) are provided on the four horizontal surfaces of the stainless steel angle steel base 13. These through holes are used to fix the planar array audio system to an indoor wall at an appropriate height using expansion bolts pre-embedded in the wall.

[0120] To prevent resonance in the planar array audio system, a thick acrylic panel 4 is embedded within the vertical edge of the stainless steel angle iron mounted on the outer frame 3 using a flexible gasket (e.g., a silicone rubber pad) 18. Simultaneously, several screw holes are pre-drilled on the side of the panel 4, and screws are used to fix the panel 4 to the angle iron edge of the outer frame 3 through these screw holes. Since this is the most common installation method in existing electromechanical products, the screw holes on the stainless steel angle iron edge of the outer frame 3, the screws, the screw holes on the side of the panel 4, and the flexible gasket 18 are omitted from the drawings.

[0121] To prevent moisture and dust from the surrounding environment from entering the internal space of the planar array speaker, after all structural components and all speaker components are assembled, removable sealant 10 is applied to the joint surfaces of the panel 4 and the outer frame 3, as well as the base plate and the inner frame 3 and the flexible pad 18. For the same reason, the undrawn parts are omitted in this invention.

[0122] Figure 3-a shows that panel 4 has 36 rows of speaker-speaker penetration holes along the horizontal axis and 20 rows along the vertical axis. 720 sealed plastic speaker enclosures 2 are embedded within these 720 penetration holes, and each sealed speaker enclosure 2 contains one speaker 1. For the same reason, the openings and installation diagrams of the penetration holes, sealed speaker enclosures 2, and neodymium iron boron internal magnet speaker 1 on the panel are omitted in this invention. Please refer to Figures 1 and 2 for details.

[0123] Figure 3-b shows a schematic diagram of the left elevation of the planar array audio system.

[0124] The DC power indicator light 6, USB interface 7, and HDMI interface 8 of the planar array audio system are all installed on a strip-shaped insulating plate, such as a phenolic cloth plate (not shown in this invention), between the outer frame 3 and the inner frame 3. After the entire planar array audio system is assembled, it is enclosed by the cover 12. At this time, the combined dimensions of frame 3 are length × width × height = 2360 × 1330 × 150 mm.

[0125] Figure 4 shows the planar layout of the base plate of the planar array audio system of the present invention and the schematic diagram of the left elevation.

[0126] As shown in Figure 4-a, the base plate 5 is made of two phenolic laminated fabric boards that are slightly thinner than the front panel 4, and is fixed to the horizontal edge of the stainless steel angle steel of the inner frame 3 with screws (not shown in this invention). The AC power connector 20, AC / DC rectifier bridge and filter and heat sink 21, wireless Bluetooth input / output module 22, analog-to-digital converter ADC 23, digital-to-analog converter DAC 24, power amplifier 25 (16 in total) and the wiring connectors leading to the front panel speaker are all mounted on the base plate 5.

[0127] Figure 4-b shows the planar array audio system with a net height of 150 mm (excluding the enclosure).

[0128] Figure 5 shows the frame structure assembly diagram of the planar array audio system of the present invention.

[0129] Figure 5-a is a front plan view of the frame 3 welded from stainless steel angle steel. Figure 5-b is an elevation view of the frame structure formed by welding two stainless steel angle steel frames 3, four equal-length stainless steel angle steel connecting rods 9, and a stainless steel angle steel base 13. Figure 5-c is a horizontal sectional view of the stainless steel angle steel connecting rods 9 and the frame 3 at the far side. Figure 5-d is a front plan view of the angle steel base 13 welded from stainless steel angle steel. The base has several evenly distributed through holes on the horizontal surface of the stainless steel angle steel around its perimeter to connect and fix expansion bolts pre-embedded in the wall to the stainless steel angle steel base. Figure 5-e is a left elevation view of the stainless steel angle steel base 13.

[0130] Figure 6 shows a schematic diagram of the housing structure of the planar array audio system of the present invention.

[0131] Figure 6-a shows the elevation view of the enclosure, which consists of three side panels and a top panel. It is made of anodized aluminum alloy or stainless steel sheet of a certain thickness. Its internal dimensions are matched to the frame dimensions of the planar array speaker system. Countersunk screws are used to connect and fix the enclosure panels to the stainless steel angle bars of the two frames 3. The open side is connected and fixed to the screw holes on the outer edge of the stainless steel angle bar frame 3 of the panel 4 using countersunk screws. To ensure that the heat generated by the planar array speaker system inside the enclosure can be discharged to the surrounding environment during operation, several heat dissipation holes 17 should be pre-installed on both sides of the enclosure near the top panel 12-2 at a height of 150mm, as shown in Figures 6-a, 6-b, and 6-c.

[0132] Figure 7 shows the sound pressure impedance frequency response curve of the ￠50mm loudspeaker of the present invention.

[0133] As can be seen from the loudspeaker sound pressure frequency response curve 11 in Figure 7-a, this loudspeaker uses equipment that the applicant has accumulated over many years. Its resonant frequency Fo 14 reaches a relatively high 199Hz due to the loop relationship, but overall, the sound pressure frequency response curve 11 shows a relatively flat and relatively stable trend. Its sound pressure reference value in the 20Hz-50Hz range is approximately 37dB-50dB. Therefore, based on the actual measured sound pressure frequency response curve 11 of the ￠50mm loudspeaker, the crossover point FL 15, approximately 120Hz below the resonant frequency Fo, must be selected as the crossover point of the planar array audio system of this invention. 20Hz-FL is used as the low-pass signal band, and FL-20kHz is used as the high-pass signal band. A linear digital filter written in software is used to digitize the 720 loudspeakers mounted on panel 4. Details can be explained in conjunction with the description in Figures 8 and 9.

[0134] Figure 7-b shows the resonant frequency Fo=199Hz, DCR=4 Ohm, and SPL=80 dB+ / 1m / 1W of a ￠50mm loudspeaker.

[0135] Figure 7-c shows the sound pressure level (SPL) frequency response curve of a ￠50mm loudspeaker. It can be seen that a crossover point FL 15 is located at 120Hz, and a crossover point FH 16 is located at 3.5kHz, thus forming a 20Hz-FL low-pass signal band, a FL-FH band-pass signal band, and a FH-20kHz high-pass signal band. For some loudspeakers with large fluctuations and uneven SPL curves, this three-way linear filter processing scheme, although increasing the complexity of the algorithm and raising the computer's resource allocation requirements, can fully utilize the phase and amplitude characteristics provided by the linear digital filter. Without causing phase shift, it can necessaryly boost or attenuate the signal level in certain frequency bands without producing phase shift, thereby achieving better sound quality in the planar array speaker system of this invention.

[0136] Figure 8 shows the low-pass filter frequency response curve of the linear digital filter of the present invention.

[0137] Figure 8-a shows the low-pass frequency response curve of a 4th-order linear digital filter, and Figure 8-b shows the low-pass frequency response curve of a 1025th-order linear digital filter. Both filters have a crossover point of 200Hz. However, the slopes of the frequency response curves are significantly different, resulting in drastically different phase shifts in the processed audio signals: the slope shown in Figure 8-a will produce significant phase distortion in the audio signal. The slope shown in Figure 8-b is very steep and will not produce phase distortion throughout the entire audio signal processing process.

[0138] It's necessary to clarify that the order of a filter refers to the order of the highest-order differential term in the filter's transfer function. Specifically, the order of a filter indicates the number of poles in its transfer function, which determines the descent rate in the transition region. Generally, each increase in order (one pole) increases the attenuation by 20 dB per decibel. Simply put, it reflects the strength of the filter's filtering capability when processing signals. Higher-order filters offer stronger filtering effects and can remove noise and other interference to a greater extent. However, higher-order filters require more computer hardware and software resources; therefore, the order of a linear digital filter must be carefully selected.

[0139] Furthermore, linear phase characteristics are one of the most important features of linear filters. This makes them widely used in many applications requiring linear phase, such as the audio signal processing field discussed in this invention. Their linear phase characteristics, i.e., phase and amplitude frequency characteristics, ensure that the delay of each frequency component of the signal is the same after passing through the filter, thereby avoiding distortion in the phase and amplitude of the processed signal.

[0140] For further related information, please refer to the Chinese invention patent CN202110983300.6 (Invention title: A novel bass playback method and device. Authorization announcement number: CN113747304B, Authorization announcement date: April 26, 2024) which has been granted to the applicant of this invention.

[0141] Figure 9 shows a schematic diagram of the speaker distribution of each channel in the 5.1-channel planar array audio system of the present invention.

[0142] This invention will provide a detailed explanation of the core technical solution of the planar array audio system in conjunction with Figures 8 and 9.

[0143] On the panel 4 of the planar array sound system shown in Figure 9, there are a total of 720 through holes (36 columns × 20 rows) to install 720 sealed speaker enclosures 2 with the same geometric dimensions. Each speaker enclosure 2 contains a ￠50mm neodymium iron boron internal magnet loudspeaker. Among them, the 80 loudspeakers in the 4 columns × 20 rows on the outer left side of the frame 3 are assigned to the speaker enclosure 2-1 for the left front channel. The 80 speakers in 4 columns × 20 rows on the right outer side of frame 3 are assigned to the right front channel as speaker 2-2. 72 speakers in (2 columns × 20 rows) + (2 columns × 16 rows) are assigned to the left rear channel as speaker 2-3, located inside the left front speaker 2-1. 72 speakers in (2 columns × 20 rows) + (2 columns × 16 rows) are assigned to the right rear channel as speaker 2-4, located inside the right front speaker 2-2. 80 speakers in (4 columns × 20 rows) are assigned to the center channel as speaker 2-5, located on both sides of the frame's vertical central axis. The remaining 336 speakers are assigned to the subwoofer channel as subwoofer 2-6.

[0144] To reduce product costs and appropriately decrease the number of power amplifiers driving the speakers, this invention uses four speakers to form each basic sound unit of the planar array audio system. Referring to the implementation shown in Figures 1, 7, and 9, two ￠50mm speakers are connected in series to form a series circuit with an impedance of 8 Ohms. These two ￠50mm speaker series circuits are then connected in parallel to form a basic sound unit with a rated impedance of 4 Ohms. Thus, in this embodiment, the left and right front channel speakers each have 20 independent basic sound units; the left and right rear channel speakers each have 18 independent basic sound units; the center channel has 20 independent basic sound units; and the subwoofer channel has 84 independent basic sound units, plus 96 basic sound units that operate synchronously and compatiblely with the left front, right front, center, left rear, and right rear channel speakers.

[0145] Based on the loudspeaker sound pressure frequency response curve in Figure 7 obtained from actual testing, a suitable crossover point FL, such as 120Hz, is selected within the frequency band below the resonant frequency FO. The linear digital filter is used to construct a 20Hz-120Hz low-pass signal band whose phase and amplitude characteristics meet the requirements of linear crossover but do not produce phase shift (if necessary, the level of the 20Hz-120Hz low-pass signal band is boosted to an appropriate dB value without producing phase shift using an algorithm). Together with the 120Hz-20kHz high-pass signal band, the signal is converted into a multi-channel audio analog signal without phase shift by a mixer and a digital-to-analog converter (DAC). The signal is then amplified by a power amplifier corresponding to the basic sound unit. The number of basic sound units driving different channels is selected so that they are synchronously superimposed and operated to achieve a balanced output level for each channel.

[0146] This constitutes the entire algorithm, which can run on a local area network server, laptop, personal computer, or independent CPU system. The 20Hz-120Hz low-pass signal band is input into the corresponding power amplifier for voltage and power amplification, and drives 84 independent bass channel basic sound units and 96 basic sound units compatible with the left front, right front, center, left rear, and right rear channels in a synchronous superposition mode, so that the planar array audio system outputs very powerful bass sound waves below 120Hz.

[0147] Meanwhile, the planar array sound system also converts the 120Hz-20kHz high-pass signal band into multi-channel audio analog signals without phase shift via a mixer and digital-to-analog converter (DAC). These signals are then amplified by power amplifiers connected to the aforementioned basic sound units, and driven in a synchronous superposition mode to power 20 left front channel basic sound units, 20 right front channel basic sound units, 20 center channel basic sound units, 18 left rear channel basic sound units, and 18 right rear channel basic sound units. This results in a successful 5.1 virtual surround sound planar array sound system with high resolution, high fidelity, a very wide audio dynamic range, and significantly improved performance, addressing the shortcomings of excessively long reverberation time within buildings.

[0148] Figure 10 shows a schematic diagram of the 5.1.4 channel speaker distribution of the planar array audio system of the present invention.

[0149] Figure 11 shows a schematic diagram of the left and right rear channel speaker distribution of the planar array audio system 5.1.4 of the present invention.

[0150] To meet the home theater needs of 86-75 inch flat-panel TVs, the present invention can divide a 2360×1330mm flat-panel array speaker panel as shown in Figures 3 and 4 into a p-shaped planar array speaker system composed of two 400×1700mm frames 3 and one 475×2360mm frame 3. An 86-75 inch flat-panel TV 108 is enclosed within this p-shaped combined frame 3.

[0151] The assembly and fabrication of the panel 4 and base plate 5 of the p-shaped combined frame 3 are described in the specification of Figures 3 to 6 of this invention and will not be repeated here. The left front channel speaker 101-1, the right front channel speaker 10-2, and the center channel speaker 101-5 each have 20 basic sound units, and the bass channel speaker 101-6 has 81 independent basic sound units. The left rear channel speaker 103 and the right rear channel speaker 104, which are separate from the p-shaped planar array speaker and installed independently, each have 20 basic sound units. The above 5.1-channel planar array speaker system has a total of 181 basic sound units and 724 ￠50mm loudspeakers.

[0152] The three frames, assembled into a p-shaped planar array speaker, have necessary holes between them as wiring channels for connecting speaker wires, power cords, etc.

[0153] The left rear channel speaker 103 and right rear channel speaker 104, installed separately on the wall behind the sofa seat 109, have a frame 3 with dimensions of 660×530×150mm (length×width×height). Their structural design is described in Figures 3 to 6 of this invention and will not be repeated here. A panoramic sound / surround sound chip 26 is installed on the base plate 5 of the p-shaped planar array speaker system and drives and controls the left rear channel speaker 103, right rear channel speaker 104, and ceiling speaker 107 in real time via the wireless channel of the Bluetooth output / input module, thereby forming a 5.1.4 planar array speaker system with panoramic sound effects.

[0154] If a 120-100 inch laser projection television is required, many different types of television planar array three-dimensional sound systems can be successfully manufactured by following the structural principles described in the specification and claims of this invention, such as Figures 3 to 8, 9 to 11.

[0155] Figure 12 shows a schematic diagram of the planar array audio system of embodiment 1 of the present invention.

[0156] This is a simple home listening room, with a minimum size of 16.2 square meters. The locations of doors and windows on wall 110 are omitted from the drawing. A planar array speaker system 101 with virtual 5.1 channel surround sound is installed on the bottom wall of the listening room, as described in Figures 3 to 9 of the specification, mounted on the wall at a height of approximately 1-1.2 meters above the ground. A sofa chair 109 for listening is placed in the center of the listening room. Assuming that the aforementioned example of this invention is still used, employing 720 ￠50mm neodymium iron boron internal magnet loudspeakers to construct a planar array speaker system, when this speaker system outputs strong bass sound waves, the total volume of the subwoofer enclosure is approximately: 0.2 × 720 × 0.3 = 43L (0.3 is the occupancy factor after deducting the loudspeaker volume from the enclosure's geometric volume).

[0157] If more efficient and superior ￠50mm neodymium iron boron internal magnet loudspeakers are used, when the sensitivity SPL of each loudspeaker is 83dB / 1m / 1W, the total number of loudspeakers required in this planar array audio embodiment is only 360 ￠50mm loudspeakers. If the sensitivity SPL of each loudspeaker is 86dB / 1m / 1W, only 180 ￠50mm loudspeakers are needed, thereby optimizing and improving the technical solution proposed in this invention.

[0158] Figure 13 shows a schematic diagram of the planar array audio system embodiment 2 of the present invention.

[0159] This embodiment 2 continues the home theater layout scheme provided in embodiment 1: a planar array sound system 101 with 5.1 virtual surround sound effect is installed on the bottom wall of the TV screening room; a 100-120 inch laser projector TV screen 111 is installed in front of the component 101 at an appropriate position; and a laser projector TV 112 is installed on the ceiling of the living room, with the projection installation distance determined by the model of the selected laser projector TV. The installation accessories for components 111 and 112 are supplied by the projector TV manufacturer. If a planar array speaker system is built using 50mm speakers with a sensitivity SPL of 86dB / 1m / 1W, approximately 180 50mm speakers are needed. The panel dimensions would then be (2360÷4)×(1330÷4)×150=590×333×150mm, which can be completely obscured behind the screen of a laser projector (TV), whether it's a hard or soft screen. This allows consumers to enjoy a 5.1-channel virtual surround sound home theater experience far exceeding the sound effects of a soundbar + subwoofer.

[0160] Figure 14 shows a schematic diagram of the planar array audio system embodiment 3 of the present invention.

[0161] This embodiment 3 continues the home theater layout scheme provided in embodiments 1 and 2: a set of 3.1-channel p-shaped planar array speakers 101 is installed on the bottom wall of the TV screening room, as shown in Figure 10. It mainly includes a left front channel speaker 101-1, a right front channel speaker 101-2, a center channel speaker 101-5, a subwoofer channel speaker 101-6, and left and right rear channel speakers 103 and 104 installed on the wall behind the sofa seat 109. Their height from the ground is approximately 1-1.2m. For details, please refer to the instructions in Figures 10 and 11, which will not be repeated here. In order to achieve an immersive three-dimensional surround sound effect, a total of 4 ￠160mm (6.5-inch) ceiling speakers 107 are installed on the ceiling above the sofa seat 109. The specific dimensions are shown in Figure 14. According to the aforementioned invention description in Figure 5, in this embodiment, the p-shaped planar array speaker 101, the left rear channel speaker 103, the right rear channel speaker 104, and the ceiling speaker 107 are connected to form a multi-channel audio wireless control network via an audio digital wireless Bluetooth output / input module. Simultaneously, the speakers are combined into a home or commercial cinema system with 5.1.4 three-dimensional surround sound through the CPU and HDMI interface of an 86-75 inch flat-screen TV surrounded by the p-shaped planar array speaker. Furthermore, a Blu-ray audio / video player and a flat-screen TV can also be connected to form a standalone 5.1.4 three-dimensional surround sound cinema system.

[0162] It should be noted that the left rear channel speaker 103 and the right rear channel speaker 104 in this embodiment 3 not only play their own rear channel audio signals, but also play very powerful and clear bass sound waves synchronously with all the basic sound-generating units of the p-shaped planar array sound system. This is the obvious difference between this invention and other 5.1.4 three-dimensional sound systems.

[0163] Figure 15 shows a schematic diagram of the planar array audio system embodiment 4 of the present invention.

[0164] This is a floor plan of a cinema / conference hall, so the specific dimensions of the building are not indicated. The locations of doors and windows on the 200mm walls and fire exits are omitted. The system includes a stage / platform (204), a theater / conference hall (205), and escalator steps (203). Ten sets of planar array speakers (201) and eight sets of traditional 6.5-inch ceiling speakers (202) are installed around the stage / platform and at appropriate heights on the walls (e.g., 3m above ground level). This allows the entire algorithm to run on a local area network server, laptop, personal computer, or other independent CPU system. Simultaneously, the system uses the small-diameter loudspeakers—the planar array speaker units—to synchronously reproduce the 20Hz-20kHz audio signal of the digital music program source (including voice). This overcomes the shortcomings of traditional subwoofers, such as excessive inertia due to the heavy vibration system, severe phase delay distortion between input and output audio signals due to excessive inductance of multi-layer voice coils, slow transient response of the diaphragm, and muddy bass. A 120Hz subwoofer has been successfully fabricated. The following is a three-dimensional surround sound planar array audio system for cinemas / conference halls, which significantly improves upon the shortcomings of powerful yet clear and pure bass, high resolution, extremely wide audio dynamic range, and excessively long reverberation time in buildings.

[0165] Although the planar geometric dimensions of the building are not specified in this embodiment of the invention, in order to achieve an immersive three-dimensional surround sound effect, the planar array speakers 201 installed on the theater / conference hall stage / staircase and surrounding walls are generally configured as a 3.1-channel sound system, similar to the p-shaped planar array speaker arrangement in Embodiments 3 and 2 of this invention, but with the same structural form as the rectangular frame 3 shown in Figures 3 to 6. Each group of four ceiling speakers 202 and one group of planar array speakers 201 are connected via an audio digital Bluetooth output / input module to form a separate channel audio signal wireless control network. However, all 10 groups of planar array speakers 201 and the audio players (including amplifiers or electronic mixing consoles) on the theater / conference hall stage / staircase are synchronously networked using wireless Bluetooth output / input modules with the same transmission frequency.

[0166] It should be noted that this embodiment 4 merely provides a new technical solution for a planar array sound system that differs significantly from traditional cinema / conference hall sound reinforcement systems. Because traditional large-diameter woofers have very high output sound pressure levels, the reverberation time of the bass sound waves, resulting from multiple reflections and superpositions within the building's interior space due to pressure, is too long, inevitably leading to a muddy and unclear bass sound. When the reverberation time is less than 300ms, the listener will perceive the sound as very dry, and the lack of sufficient overtones makes even speech sound less full and pleasant. This invention generates very powerful bass sound waves by synchronously superimposing hundreds (at least 180) small-diameter loudspeakers. However, the output sound pressure level of each loudspeaker is not high, and the vibration system of each small loudspeaker is very lightweight, with minimal inertia during piston-like motion. Therefore, although the bass and even sub-bass sound waves generated by the planar array sound system of this invention have a very strong sound field, these bass sounds consistently clear and pure, without any of the muddy sound of traditional woofers. Therefore, the use of planar array integrated sound systems in cinemas / conference halls is a very complex and important system engineering project, which cannot be covered by a simple invention or embodiment.

[0167] Figure 16 shows a frontal elevation view of Embodiment 5 of the planar array audio system of the present invention.

[0168] Figure 17 shows a schematic diagram of the rear facade arrangement of Embodiment 5 of the planar array audio system of the present invention.

[0169] Unlike the description in Figures 3 to 15 of this invention, the aforementioned planar array audio system is an independent audio product composed of components such as frame 3, panel 4, base plate 5, stainless steel angle iron base 13, and frame housing 12, which is usually installed on or embedded in a wall. Although the speakers and enclosures in this embodiment 5 are also mounted on a panel, they are typically thinner, for example, made of fiberglass board or flame-retardant ABS plastic board. As shown in Figure 16-a, a long rectangular cavity 303 is provided at the lower end of the all-in-one computer or desktop computer monitor panel 301, with tongue and groove joints around its perimeter. A panel 304 is installed within the projected area of ​​this lower end cavity 303, and is fixed to the computer or monitor housing by several pre-set nuts—plastic pillars and flexible pads 18—at the bottom of the chassis. The panel 304 is equipped with 20 columns × 4 rows = 80 ￠20×16 core neodymium iron boron speakers and matching enclosures.

[0170] As shown in Figure 17-a, a long, recessed rectangular cavity 305 is provided in the middle of the back cover of the all-in-one computer or desktop computer monitor. The cavity has tongue and groove joints around its perimeter. A panel 306 is installed within the projected area of ​​this cavity 305. The panel 306 is fixed to the all-in-one computer or monitor housing by several pre-set nuts—plastic posts and flexible washers 18—at both ends of the inner side of the panel. The panel 306 is equipped with 20 columns × 4 rows = 80 ￠20×16 core neodymium iron boron speakers and matching speaker enclosures.

[0171] Therefore, it can be seen that this embodiment 5 has a total of 160 ￠20 mm loudspeakers and matching speaker boxes.

[0172] (A total of 40 basic sound units). For details on the settings of the dedicated sound channels, please refer to the description in Figure 10 of this invention, which will not be repeated here.

[0173] The speaker 1 and speaker 2 are mounted and fixed on the panel through X pre-set through holes to prevent resonance during normal operation. As shown in Figures 16-b and 17-b, a stainless steel speaker cover plate 307 is also provided on the tongue and groove joints of the cavities 303 and 305 to cover the cavities and is flush with the outer surface of the all-in-one computer or monitor panel and back cover.

[0174] Generally, the diameter of speaker 1 is between Ø8 and 25mm, but the inventor recommends using a Ø20mm diameter, 16-core cone-shaped neodymium iron boron internal magnet speaker. Linear digital filters and their algorithms, mixers, etc., can all be written to the HDD or SSD of an all-in-one computer or desktop computer. Since the order of the linear digital filter is generally above 1025 to ensure that the processed audio digital signal does not undergo phase shift when converted to an analog signal, this embodiment requires a high-end all-in-one computer or desktop computer with at least 16GB of RAM. The HDD capacity should be at least 2TB and reach 10000RPM. When using an SSD, it should be at least 1TB with a speed of 2000MB / s, and the computer's CPU should have a clock speed of at least 3.8-5.3GHz, similar to an Intel i5-14600KF or i7-14700K processor. The AC / DC 30-100W power supply rectifier bridge, filter, and heat sink, analog-to-digital converter (ADC), digital-to-analog converter (DAC), and power amplifier for the planar array audio system are all installed on a PCB expansion board inside the all-in-one computer / desktop computer chassis, using IC integrated circuit modules as much as possible. Therefore, this embodiment 5 is a new technical solution different from the aforementioned planar array audio systems. It enables the creation of a 2.1 / 3.1 channel planar array multimedia audio system with powerful bass effects for all-in-one computers or desktop computer monitors larger than 22.3 inches.

Claims

1. A sound system and its manufacturing method comprising a loudspeaker-speaker planar array, including a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speaker enclosures, a frame, a panel, a base plate, a housing, flexible padding, a PCB board, fasteners, etc., characterized in that: The loudspeaker described above is a loudspeaker with a diameter of Ø38--63mm. Each loudspeaker is equipped with a speaker enclosure of the same geometric dimensions. The speaker enclosure can be a sealed enclosure or an open enclosure. Each basic sound-generating unit of the planar array audio system consists of 1 to N loudspeakers. The X basic sound-generating units are assembled into a set of one or more planar array audio systems configured around a flat-panel TV / laser projection TV by means of a frame, panel, base plate, cover, fasteners and flexible pads made of rigid materials. b. A panel made of a relatively thick rigid material is embedded and fixed in a closed outer frame by a flexible pad and the panel is connected and fixed to the frame by fasteners; c. The panel is uniformly provided with (1 to N)×X through holes, and (1 to N)×X speaker enclosures made of rigid material are embedded in the through holes of the panel. The (1 to N)×X speakers are also embedded in the speaker enclosures of the panel, and an electrical connection relationship of 1 to N speakers is established between the basic sound-generating units of the planar array audio system. d. According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speaker has a relatively flat sound pressure frequency response curve, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. This yields a 20Hz-FL low-pass signal band and a FL-20kHz high-pass signal band, which are then converted into analog signals without phase shift by a mixer and a digital-to-analog converter (DAC). These signals are then amplified by the corresponding power amplifier and driven in a synchronous superposition mode to drive the basic sound units belonging to each channel. At the same time, the basic sound units of the bass channel, which consist of all the speakers, are driven in a synchronous superposition mode. e. According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speakers have large fluctuations and uneven sound pressure frequency response curves, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. At the same time, an appropriate crossover point FH is selected in the FO uplink frequency band. This yields the 20Hz-FL low-pass signal band, the FL-FH bandpass signal band, and the FH-20kHz high-pass signal band. These signals are then converted into analog signals without phase shift by a mixer and a digital-to-analog converter (DAC). After being amplified by the corresponding power amplifier, the basic sound units belonging to each channel are driven in a synchronous superposition mode. Simultaneously, the basic sound units of the bass channel, composed of all the speakers, are driven in a synchronous superposition mode. f. A base plate made of a thin, rigid material is fixed inside the inner frame and connected and fixed to the frame by fasteners; g. The projected areas of the outer position frame and the inner position frame are equal, and four rigid connecting rods of equal height are connected at appropriate positions. Then, an angle steel base is connected to the bottom of the inner position frame. The frame and angle steel base of the planar array speaker are fixed to the indoor wall at an appropriate height by expansion bolts pre-embedded in the wall. h. The base plate of the inner position frame is provided with a 300-1000W AC / DC power rectifier bridge, filter and heat dissipation device for the planar array speaker, an HDMI or USB interface and bus for the audio player, a wireless / Bluetooth input module for the audio digital wireless / Bluetooth output module, and a PCB board of several digital-to-analog converters (DACs) and several discrete power amplifier modules or a power amplifier IC integrated module mounted on the base plate of the planar array speaker. i. The resulting algorithm can run on a local area network server, laptop, personal computer, flat-screen TV microcomputer, or other independent CPU system. Simultaneously, it uses the synchronous superposition of several basic sound-generating units of the small-diameter loudspeaker—a planar array speaker—to reproduce the 20Hz-20kHz audio signal of the digital music program source (including voice). This overcomes the existing technical defects of traditional woofers, such as excessive inertia due to the excessive mass of the vibration system, severe phase delay distortion due to excessive inductance of the multi-layer voice coil, slow transient response speed of the cone, and muddy bass. It successfully creates a 20-120Hz flat-screen TV / laser projection TV three-dimensional or two-dimensional surround sound planar array speaker system with powerful bass, high resolution, and a very wide audio dynamic range. Type claim 1 here.

2. A sound system and its manufacturing method comprising a loudspeaker-speaker planar array, including a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speaker enclosures, a frame, a panel, a base plate, a cover, flexible padding, a PCB board, fasteners, and other components, characterized in that: a. The loudspeaker is a loudspeaker with a diameter of Ø38--100mm. Each loudspeaker is equipped with a speaker box of the same geometric dimensions. The speaker box can be a sealed box or an open box. Each basic sound unit of the planar array sound system consists of 1 to N loudspeakers. X basic sound units are assembled into several planar array sound systems configured on the stage and surrounding walls and ceiling of the theater / conference hall by means of a frame, panel, base plate, cover, fasteners and flexible pads made of rigid materials. b. A panel made of a relatively thick rigid material is embedded and fixed in a closed outer frame by a flexible pad and the panel is connected and fixed to the frame by fasteners; c. The panel is uniformly provided with (1 to N)×X through holes, and (1 to N)×X speaker enclosures made of rigid material are embedded in the through holes of the panel. The (1 to N)×X speakers are also embedded in the speaker enclosures of the panel, and an electrical connection relationship of 1 to N speakers is established between the basic sound-generating units of the planar array audio system. d. According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speaker has a relatively flat sound pressure frequency response curve, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo by the algorithm of the linear digital filter, thereby obtaining the 20Hz-FL low-pass signal band and the FL-20kHz high-pass signal band. These are then converted into analog signals without phase shift by the mixer and digital-to-analog converter (DAC), and then connected to the corresponding power amplifier for amplification. The basic sound units belonging to each channel are driven in a synchronous superposition mode, and the bass channel basic sound unit composed of all speakers is driven in a synchronous superposition mode. e. According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speakers have large fluctuations and uneven sound pressure frequency response curves, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. At the same time, an appropriate crossover point FH is selected in the FO uplink frequency band. This yields the 20Hz-FL low-pass signal band, the FL-FH bandpass signal band, and the FH-20kHz high-pass signal band. These signals are then converted into analog signals without phase shift by a mixer and a digital-to-analog converter (DAC). After being amplified by the corresponding power amplifier, the basic sound units belonging to each channel are driven in a synchronous superposition mode. Simultaneously, the basic sound units of the bass channel, composed of all the speakers, are driven in a synchronous superposition mode. f. A base plate made of a thin, rigid material is fixed inside the inner frame and connected and fixed to the frame by fasteners; g. The projected areas of the outer position frame and the inner position frame are equal, and four rigid connecting rods of equal height are connected at appropriate positions. Then, an angle steel base is connected to the bottom of the inner position frame. The frame and angle steel base of the planar array speaker are fixed to the indoor wall at an appropriate height by expansion bolts pre-embedded in the wall. h. The base plate of the inner position frame is provided with a 500-2000W AC / DC power rectifier bridge, filter and heat dissipation device for the planar array speaker, an HDMI or USB interface and bus for the audio player, a wireless / Bluetooth input module for the audio digital wireless / Bluetooth output module, and a PCB board of several digital-to-analog converters (DACs) and several discrete power amplifier modules or a power amplifier IC integrated module mounted on the base plate of the planar array speaker. i. Several sets of planar array speakers and several sets of traditional ceiling speakers are installed around the stage / platform and at appropriate heights on the interior walls of the theater or auditorium. This constitutes a complete algorithm that can run on a local area network server, laptop, personal computer, or other independent CPU system. At the same time, the small-diameter dynamic loudspeaker-speaker planar array basic sound unit is synchronously superimposed to reproduce the 20Hz-20kHz audio signal of the digital music program source (including voice). This overcomes the existing technical defects of traditional woofers, such as excessive inertia due to excessive mass of the vibration system, serious phase delay distortion due to excessive inductance of multi-layer voice coils, slow transient response speed of the cone, and muddy bass. The resulting three-dimensional or two-dimensional surround sound planar array speaker system for theaters / audio halls has been successfully prepared, which has a powerful bass, high resolution, very wide audio dynamic range, and significantly improved reverberation time in buildings.

3. An audio system and its manufacturing method comprising a loudspeaker-speaker planar array, including a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speaker enclosures, a frame, a panel, a base plate, a housing, flexible padding, a PCB board, fasteners, and other components, characterized in that: a. The loudspeaker is a loudspeaker with a diameter of Ø8--25mm. Each loudspeaker is equipped with a speaker enclosure of the same geometric dimensions. The speaker enclosure can be a sealed enclosure or an open enclosure. Each basic sound unit of the planar array speaker consists of 1 to N loudspeakers and speaker enclosures. X basic sound units are assembled into a planar array speaker system by installing a panel, PCB board, stainless steel speaker enclosure, fasteners and flexible pads in the cavity at the lower end of the computer monitor / all-in-one computer panel and the cavity in the recessed part of its back shell. b. A panel made of rigid material is embedded and fixed in a pre-set cavity at the lower end of the computer monitor / all-in-one computer panel and the cavity of the recessed part of the back shell, and the panel is connected and fixed to the cavity of the computer monitor / all-in-one computer by fasteners. c. The panel is uniformly provided with (1 to N)×X through holes, and (1 to N)×X speaker enclosures made of rigid material are embedded in the through holes of the panel. The (1 to N)×X speakers are also embedded in the speaker enclosures of the panel, and an electrical connection relationship of 1 to N speakers is established between the basic sound-generating units of the planar array audio system. d. According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speaker has a relatively flat sound pressure frequency response curve, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. This yields a 20Hz-FL low-pass signal band and a FL-20kHz high-pass signal band, which are then converted into analog signals without phase shift by a mixer and a digital-to-analog converter (DAC). These signals are then amplified by the corresponding power amplifier and driven in a synchronous superposition mode to drive the basic sound units belonging to each channel. At the same time, the basic sound units of the bass channel, which consist of all the speakers, are driven in a synchronous superposition mode. e. The 30-100W AC / DC power rectifier bridge, filter, and heat dissipation device for the planar array audio system, as well as the USB or HDMI interface and bus that are compatible with the audio player, are all provided by the computer system. Several digital-to-analog converters (DACs) and several discrete power amplifier modules or a single power amplifier IC integrated module are installed on the PCB board or PCB expansion board of the computer monitor / all-in-one computer. f. The resulting algorithm can run on a local area network server, laptop, personal computer, or other independent CPU system. Simultaneously, it uses the small-diameter loudspeaker—the basic sound-generating unit of the speaker planar array—to synchronously and superimpose the 20Hz-20kHz audio signal of the digital music program source (including voice). This overcomes the existing technical defect of traditional computer speakers lacking bass, and successfully produces a 2.1-5.1 channel planar array speaker system for computers with powerful bass, high resolution, and a very wide audio dynamic range of 20-120Hz.

4. A sound system comprising a loudspeaker-speaker planar array as described in claim 1, 2, or 3, and a method for manufacturing the same, characterized in that: The panel is an organic glass plate or stainless steel plate with an electroplated metal film on the outer surface, and the fitting joint between it and the frame and flexible pad is coated with a removable flexible sealant.

5. A sound system comprising a loudspeaker-speaker cabinet planar array as described in claim 1, 2, or 3, and its manufacturing method thereof, characterized in that: The bottom of the speaker installed on the panel is provided with a pair of speaker terminal boards with obvious differences in positive and negative shapes. One end of the terminal boards is connected to the positive or negative terminal of the speaker embedded in the speaker box, and the other end is connected to the X basic sound units and the X power amplifiers through connectors and audio wires.

6. The audio system comprising a loudspeaker-speaker planar array as described in claim 3, characterized in that: The outermost part of the cavity of the computer monitor / all-in-one computer is also provided with a stainless steel speaker cover plate, which is flush with the corresponding shell of the computer monitor / all-in-one computer.

7. A method for manufacturing an audio system consisting of a loudspeaker-speaker planar array, comprising a CPU and memory, an AC / DC power rectifier bridge and filter and heat dissipation device, an HDMI or USB interface and bus, an audio digital wireless Bluetooth input / output module, a linear digital filter and its algorithm, a mixer, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a power amplifier, loudspeakers and matching speaker enclosures, a frame, a panel, a base plate, a cover, flexible pads, a PCB board, fasteners, speaker enclosure panels, etc., characterized in that: a. The loudspeaker is a loudspeaker with a diameter of Ø8--100mm. Each loudspeaker is equipped with a speaker enclosure of the same geometric dimensions. The speaker enclosure can be a sealed enclosure or an open enclosure. Each basic sound unit of the planar array audio system consists of 1 to N loudspeaker enclosures. X basic sound units are assembled into a planar array audio system that runs close to the building wall, embedded in the wall, or embedded in the cavity at the bottom of a computer monitor / all-in-one computer and its back shell cavity through a frame, panel, base plate, fasteners and flexible pads made of rigid materials. b. According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound units belonging to different channels. When the speakers have a relatively flat sound pressure frequency response curve, an appropriate crossover point FL is selected in the frequency band below the resonant frequency FO, and the linear digital filter is used to form a 20Hz-FL low-pass signal band with phase frequency and amplitude frequency characteristics that meet the requirements of linear crossover but do not produce phase shift. If necessary, the level of the 20Hz-FL low-pass signal band is boosted to an appropriate dB value without producing phase shift through an algorithm. Together with the FL-20kHz high-pass signal band, it is converted into a multi-channel audio analog signal without producing phase shift through a mixer and a digital-to-analog converter (DAC). The signal is then amplified by a voltage-power amplifier corresponding to the basic sound unit. The number of basic sound units driving different channels is selected so that they are synchronously superimposed and operated to achieve a balanced output level for each channel. c. According to the pre-set channel requirements of the planar array audio system, the speakers on the panel are divided into basic sound-generating units belonging to different channels. When the speakers have large fluctuations and uneven sound pressure frequency response curves, a crossover point FL is selected in the frequency band below the speaker resonant frequency Fo using a linear digital filter algorithm. At the same time, an appropriate crossover point FH is selected in the upward frequency band of Fo, thereby obtaining the 20Hz-FL low-pass signal band, the FL-FH band-pass signal band, and the FH-20kHz high-pass signal band. If necessary, the 20Hz-FL band is further divided using an algorithm. The low-pass signal band is boosted to an appropriate dB value without phase shift, or the FL-FH high-pass signal band and FH-20kHz high-pass signal band are boosted or attenuated to an appropriate dB value without phase shift. The signal is then converted into a multi-channel audio analog signal without phase shift by a mixer and a digital-to-analog converter (DAC). The signal is then amplified by a power amplifier corresponding to the basic sound unit. The number of basic sound units driving different channels is selected so that they can be synchronously superimposed to achieve a balanced output level for each channel. d. The resulting algorithm can run on a local area network server, laptop, personal computer, or independent CPU system. It uses the synchronous superposition of the basic sound-generating units of the small-diameter loudspeaker-speaker planar array speaker to reproduce the 20Hz-20kHz audio signal of the digital music program source. This overcomes the existing technical defects of traditional woofers, such as excessive inertia due to the excessive mass of the vibration system, severe phase delay distortion due to the excessive inductance of the multi-layer voice coil, slow transient response of the cone, and muddy bass. It successfully prepares a three-dimensional or two-dimensional multi-channel planar array speaker system with powerful bass, high resolution, very wide audio dynamic range, and significantly improved sound wave reverberation time in buildings.

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