Integrated digital power amplifier navigation display

Abstract

The utility model discloses an integral type digital power amplifier navigation display belongs to vehicle -mounted electronic equipment technical field, including the casing that is composed of front shell and back cover, and the inside fixed mounting of front shell has display screen, and the inside integrated of back cover has built -in audio power amplifier, back cover outside is equipped with GPS interface, RADIO interface, HDMI interface, COAXIAL interface, OPTICAL interface, 4G+ interface and 4G interface, respectively electrically connected to the navigation processing module, the radio module, audio and video processing unit, digital audio output circuit and 4G communication module integrated on main control board, built -in audio power amplifier adopts class D power amplifier chip, and its input end connects the audio output end of audio and video processing unit, and the output end is connected to the four -way loudspeaker wiring terminal in the casing inside preset, the utility model discloses through the built -in audio power amplifier integrated in intelligent navigation host computer, saves the complex wiring and secondary amplification link required by external power amplifier, improves system stability, and simplifies navigation display structure whole.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle electronic equipment technology, and in particular relates to an integrated digital power amplifier navigation display. Background Technology

[0002] In the current field of in-vehicle intelligent entertainment systems, intelligent large-screen navigation has become the mainstream configuration. Existing intelligent vehicle systems generally adopt a built-in analog audio amplifier solution to drive four speakers. Although this can meet the daily listening needs of general users, it still has the following shortcomings:

[0003] On the one hand, limited by the number of physical channels, traditional four-channel output cannot support multi-channel layouts such as center channel, surround channels, and independent subwoofers. On the other hand, the built-in amplifier has limited power and mostly uses analog signal processing paths, which are prone to problems such as dynamic compression and increased distortion. Although some high-end models have integrated DSP for sound effect tuning, their audio output still relies on the analog amplifier stage. Usually, an external digital amplifier needs to be installed. This not only increases the complexity of wiring and occupies space in the trunk or under the dashboard, but also introduces additional noise, phase shift, and signal degradation because the audio signal must first be amplified by the built-in amplifier before being converted into a low-level signal and sent to the external amplifier, which seriously affects the sound quality reproduction.

[0004] To address these issues, we offer an integrated digital amplifier navigation display. Utility Model Content

[0005] The purpose of this invention is to provide an integrated digital amplifier navigation display. By integrating the built-in audio amplifier into the smart navigation host, it solves the problems of complex structure and insufficient stability of the audio output amplifiers that are used in existing vehicle navigation displays.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is an integrated digital amplifier navigation display, comprising a housing consisting of a front shell and a rear cover. A display screen is fixedly installed inside the front shell, and a built-in audio amplifier is integrated inside the rear cover. The lower part of the housing has multiple power terminals for connecting to external power supply lines. The outer side of the rear cover has a GPS interface, a RADIO interface, an HDMI interface, a COAXIAL interface, an OPTICAL interface, a 4G+ interface, and a 4G- interface. The GPS interface is electrically connected to the navigation processing module; the RADIO interface is electrically connected to the radio module; the HDMI and OPTICAL interfaces are respectively connected to the audio / video processing unit via data cables; the COAXIAL interface is connected to the digital audio output circuit; the 4G+ and 4G- interfaces are respectively connected to the positive and negative signal terminals of the 4G communication module. The navigation processing module, radio module, audio / video processing unit, digital audio output circuit, and 4G communication module are integrated on a main control board. The input terminal of the built-in audio amplifier is electrically connected to the audio output terminal of the audio / video processing unit, and its output terminal is connected to a pre-set four-way speaker terminal block inside the housing.

[0008] The present invention is further configured such that the front shell and the rear cover are detachably connected by a combination of buckles and screws.

[0009] The present invention is further configured such that the built-in audio amplifier adopts a Class D amplifier chip, and its heat sink is attached to the heat-conducting area of ​​the inner wall of the back cover.

[0010] The present invention is further configured such that the GPS interface is an SMA female connector, configured to connect to an external GPS antenna, and its inner conductor is connected to the RF input terminal of the navigation processing module via a coaxial cable.

[0011] The present invention is further configured such that the plurality of power supply terminals include a 12V power supply positive terminal, a 12V power supply negative terminal, an ACC signal terminal, and a remote power-on control terminal.

[0012] The present invention is further configured such that the COAXIAL interface and the OPTICAL interface share the same digital audio source, which is derived from the audio and video processing unit and output to the coaxial or optical fiber channel respectively through a switching switch.

[0013] The present invention is further configured such that the 4G+ interface and the 4G- interface are SMA female connectors, which are respectively connected to the differential antenna input terminal of the 4G communication module.

[0014] The present invention is further configured such that the display screen is connected to the main control board via a flexible ribbon cable, and the main control board is also electrically connected to the navigation processing module, the radio module, the digital audio output circuit, the 4G communication module and the audio and video processing unit respectively, and the main control board and each module are fixed together on the inner wall of the back cover.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model integrates the navigation host and audio amplifier into one unit, eliminating the complex wiring and space occupation required by the traditional solution of adding an external amplifier. This not only greatly simplifies the installation process but also reduces the overall cost and failure rate. The built-in Class D digital amplifier effectively avoids interference from high-current audio signals to the main control system and other sensitive modules. At the same time, its heat sink is directly attached to the heat conduction area of ​​the inner wall of the back cover, improving the thermal stability and reliability under long-term high-load operation.

[0017] 2. This utility model retains the four-way speaker driving structure in traditional power amplifiers, so that the audio signal is sent directly from the audio and video processing unit to the digital power amplifier without going through the built-in analog power amplifier and then being transferred to an external power amplifier. This reduces signal distortion, noise superposition and dynamic loss, and improves sound reproduction and auditory clarity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a front view diagram of the overall structure of an integrated digital amplifier navigation display.

[0020] Figure 2 This is a schematic diagram of the rear side of the overall structure of the integrated digital amplifier navigation display.

[0021] Figure 3 This is a schematic diagram of the other side of the rear of the integrated digital amplifier navigation display.

[0022] Figure 4 This is a rear view of the overall structure of the integrated digital amplifier navigation display.

[0023] Figure 5 This is a schematic diagram of the lower part of the overall structure of the integrated digital power amplifier navigation display.

[0024] Figure 6 This is a block diagram of the principle of an integrated digital power amplifier navigation display.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Housing; 11. Front Housing; 12. Rear Cover; 12a. GPS Interface; 12b. RADIO Interface; 12c. HDMI Interface; 12d. COAXIAL Interface; 12e. OPTICAL Interface; 12f. 4G+ Interface; 12g. 4G- Interface; 12h. Four-channel Speaker Terminal Block; 13. Display Screen; 14. Built-in Audio Amplifier; 15. Power Supply Terminal; 3. Main Control Board; 31. Navigation Processing Module; 32. Radio Module; 33. Audio and Video Processing Unit; 34. Digital Audio Output Circuit; 35. 4G Communication Module. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Example

[0029] Please see Figure 1-6 This utility model is an integrated digital amplifier navigation display, comprising a housing 1 consisting of a front shell 11 and a rear cover 12, which are detachably connected by a combination of snaps and screws; a display screen 13 is fixedly installed inside the front shell 11, and a built-in audio amplifier 14 is integrated inside the rear cover 12; the lower part of the housing 1 has multiple power terminals 15 for connecting to external power supply lines; the outer side of the rear cover 12 is provided with a GPS interface 12a, a RADIO interface 12b, an HDMI interface 12c, a COAXIAL interface 12d, an OPTICAL interface 12e, a 4G+ interface 12f, and a 4G- interface 12g; wherein, the GPS interface 12a is electrically connected to a navigation processing module 31; the RADIO interface 12b is electrically connected to a navigation processing module 31; the RADIO interface 12c ... The ADIO interface 12b is electrically connected to the radio module 32; the HDMI interface 12c and the OPTICAL interface 12e are respectively connected to the audio and video processing unit 33 via data cables; the COAXIAL interface 12d is connected to the digital audio output circuit 34; the 4G+ interface 12f and the 4G- interface 12g are respectively connected to the positive and negative signal terminals of the 4G communication module 35; the navigation processing module 31, the radio module 32, the audio and video processing unit 33, the digital audio output circuit 34, and the 4G communication module 35 are integrated on the main control board 3; the input terminal of the built-in audio amplifier 14 is electrically connected to the audio output terminal of the audio and video processing unit 33, and its output terminal is connected to the four-way speaker wiring terminal 12h preset inside the housing 1.

[0030] The integrated digital amplifier navigation display provided in this embodiment highly integrates the functions of a traditional in-vehicle navigation host, and achieves integrated collaboration of audio and video processing, navigation communication, and high-power audio output through optimized internal layout and interface configuration. The overall housing 1 adopts a combined structure of front shell 11 and rear cover 12, which takes into account both ease of assembly and structural stability, while also facilitating later maintenance. Multiple functional modules are centrally arranged on the main control board 3 and firmly installed on the inner wall of the rear cover 12, effectively saving space and improving the overall compactness. The display screen 13 is connected to the main control board 3 through a flexible ribbon cable, which ensures reliable signal transmission while adapting to confined installation environments.

[0031] In terms of the audio system, the original four speaker outputs are retained, and a six-channel digital power amplifier unit with independent power supply is integrated. This amplifier uses Class D chips and utilizes the heat dissipation area on the inner wall of the rear cover 12 for efficient heat dissipation, ensuring the stability of continuous high power output while preventing heat accumulation from affecting other electronic components. The audio signal is directly sent to the digital power amplifier by the audio / video processing unit 33, reducing the need for an external power amplifier and thus reducing signal distortion and noise interference.

[0032] The outer side of the rear cover 12 houses a variety of functional interfaces, including a GPS antenna interface for high-precision positioning, a radio signal input port, an HDMI audio / video input, coaxial and optical digital audio outputs, and a differential antenna interface supporting 4G communication. These interfaces precisely connect to the corresponding functional modules on the main control board 3, ensuring efficient and low-loss transmission of various signals. The coaxial and optical fibers share the same digital audio source, and the output path can be selected via a switch, balancing compatibility and flexibility. The power supply terminal 15 integrates 12V power supply, ACC trigger, and remote power-on control signals, adapting to the electrical systems of various vehicle models.

[0033] Specifically, the display screen 13 is connected to the main control board 3 via a flexible ribbon cable. The main control board 3 is also electrically connected to the navigation processing module 31, the radio module 32, the digital audio output circuit 34, the 4G communication module 35, and the audio and video processing unit 33. The main control board 3 and each module are fixed together on the inner wall of the back cover 12.

[0034] Furthermore, the built-in audio amplifier 14 uses a Class D amplifier chip, and its heat sink is attached to the heat-conducting area of ​​the inner wall of the back cover 12; the GPS interface 12a is an SMA female connector, configured to connect to an external GPS antenna, and its inner conductor is connected to the RF input terminal of the navigation processing module 31 through a coaxial cable; the multiple power terminals 15 include a 12V power positive terminal, a 12V power negative terminal, an ACC signal terminal, and a remote power-on control terminal; the COAXIAL interface 12d and the OPTICAL interface 12e share the same digital audio source, which originates from the audio and video processing unit 33 and is output to the coaxial or fiber optic channel respectively through a switching switch; the 4G+ interface 12f and the 4G- interface 12g are SMA female connectors, respectively connected to the differential antenna input terminal of the 4G communication module 35.

[0035] The operation process of this embodiment is as follows: First, the integrated digital power amplifier navigation display is connected to the vehicle electrical system through the power terminal 15 at the bottom of the housing 1. The positive and negative terminals of the 12V power supply provide the main power supply, the ACC signal terminal is used to detect the vehicle ignition status to realize automatic power on and off, and the remote power-on control terminal can be used to start the host in conjunction with external devices.

[0036] Subsequently, external functional modules are connected according to actual needs: the GPS antenna is screwed into the SMA female GPS interface 12a on the back cover 12 to ensure that the navigation positioning signal is stably input to the navigation processing module 31; the radio antenna is connected to the RADIO interface 12b so that the radio module 32 can receive FM / AM broadcast signals normally; if an external high-definition video source is required, it can be connected through the HDMI interface 12c, and the audio and video processing unit 33 decodes and displays it on the display screen 13; for high-fidelity audio output requirements, users can choose to connect an external audio system through the OPTICAL fiber optic interface 12e or the COAXIAL coaxial interface 12d. The two share the same digital audio source, and one output is selected through an internal switch to avoid signal conflict; at the same time, in order to realize the 4G network function, matching 4G differential antennas need to be installed on the 4G+ interface 12f and the 4G- interface 12g respectively, so that the 4G communication module 35 can stably access the mobile network and support online navigation, OTA upgrades and streaming media playback;

[0037] After the hardware connection is completed, the device is powered on and the vehicle system is automatically loaded. Users can operate navigation, music, radio, Bluetooth phone and other applications through the touch screen 13. The built-in audio amplifier 14 directly amplifies the audio signal output by the audio and video processing unit 33. The four standard speakers are driven by the pre-set wiring terminals 12h in the housing 1, while the center speaker and subwoofer can be connected to the reserved dedicated output ports according to the user's audio configuration. A complete multi-channel car audio system can be built without the need for additional external amplifiers.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An integrated digital amplifier navigation display, comprising a housing (1) consisting of a front shell (11) and a rear cover (12), wherein a display screen (13) is fixedly installed inside the front shell (11), and a built-in audio amplifier (14) is integrated inside the rear cover (12); characterized in that: The lower part of the housing (1) is provided with a plurality of power terminals (15) for connecting external power supply lines; the outer side of the rear cover (12) is provided with a GPS interface (12a), a RADIO interface (12b), an HDMI interface (12c), a COAXIAL interface (12d), an OPTICAL interface (12e), a 4G+ interface (12f) and a 4G- interface (12g); The GPS interface (12a) is electrically connected to the navigation processing module (31); the RADIO interface (12b) is electrically connected to the radio module (32); the HDMI interface (12c) and the OPTICAL interface (12e) are respectively connected to the audio and video processing unit (33) via data cables; the COAXIAL interface (12d) is connected to the digital audio output circuit (34); and the 4G+ interface (12f) and the 4G- interface (12g) are respectively connected to the positive and negative signal terminals of the 4G communication module (35). The navigation processing module (31), radio module (32), audio and video processing unit (33), digital audio output circuit (34) and 4G communication module (35) are integrated on the main control board (3); the input terminal of the built-in audio amplifier (14) is electrically connected to the audio output terminal of the audio and video processing unit (33), and its output terminal is connected to the four-way speaker wiring terminal (12h) preset inside the housing (1).

2. The integrated digital power amplifier navigation display according to claim 1, characterized in that, The front shell (11) and the rear cover (12) are detachably connected by a combination of buckles and screws.

3. The integrated digital power amplifier navigation display according to claim 1, characterized in that, The built-in audio amplifier (14) uses a Class D amplifier chip, and its heat sink is attached to the heat-conducting area of ​​the inner wall of the back cover (12).

4. The integrated digital power amplifier navigation display according to claim 1, characterized in that, The GPS interface (12a) is an SMA female connector configured to connect to an external GPS antenna, and its inner conductor is connected to the RF input terminal of the navigation processing module (31) via a coaxial cable.

5. The integrated digital power amplifier navigation display according to claim 1, characterized in that, The plurality of power terminals (15) include a 12V power positive terminal, a 12V power negative terminal, an ACC signal terminal and a remote power-on control terminal.

6. The integrated digital power amplifier navigation display according to claim 1, characterized in that, The COAXIAL interface (12d) and the OPTICAL interface (12e) share the same digital audio source, which originates from the audio and video processing unit (33) and is output to the coaxial or optical fiber channel respectively through a switching switch.

7. The integrated digital power amplifier navigation display according to claim 1, characterized in that, The 4G+ interface (12f) and 4G- interface (12g) are SMA female connectors, which are respectively connected to the differential antenna input terminal of the 4G communication module (35).

8. The integrated digital power amplifier navigation display according to claim 1, characterized in that, The display screen (13) is connected to the main control board (3) via a flexible ribbon cable. The main control board (3) is also electrically connected to the navigation processing module (31), the radio module (32), the digital audio output circuit (34), the 4G communication module (35), and the audio and video processing unit (33). The main control board (3) and each module are fixed together on the inner wall of the back cover (12).

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