Unlock instant, AI-driven research and patent intelligence for your innovation.

Device for reducing audio noise of added, refitted and separated on-board audio-visual devices

A technology for audio-visual equipment and low-voltage protection, which is used in output power conversion devices, instruments, and adjustment of electrical variables.

Inactive Publication Date: 2016-10-26
艾英勇
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a device for reducing the audio noise of retrofitting and splitting car audio-visual equipment. To solve the noise problem caused by the power supply

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device for reducing audio noise of added, refitted and separated on-board audio-visual devices
  • Device for reducing audio noise of added, refitted and separated on-board audio-visual devices
  • Device for reducing audio noise of added, refitted and separated on-board audio-visual devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0029] figure 1 It is a DC-DC circuit conventionally used in the prior art. Its structure is simple, and its primary and secondary grounds are connected. The structure of this circuit is widely used, so there is no need to go into details.

[0030] figure 2 It is a schematic diagram of the circuit structure of the device for reducing the audio noise of the installation and modification and the split car audio-visual equipment of the present invention. The device for reducing the audio noise of installation, modification and split vehicle audio-visual equipment of the present invention includes a power supply circuit, an overcurrent low-voltage protection circuit, a feedback circuit and a rectifier circuit. The power supply circuit uses isolated DC- DC power supply, and the isolation transformer T1 is used in the isolated DC-DC power supply to isolate ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention discloses a device for reducing audio noise of added, refitted and separated on-board audio-visual devices. The device comprises a power supply circuit, an overcurrent low-voltage protection circuit, a feedback circuit and a rectifying circuit; the power supply circuit uses an isolated DC-DC (Direct Current) power supply in the on-board audio-visual device, and uses an isolation transformer to isolate a primary power supply and a secondary power supply in the isolated DC-DC power supply; the power supply circuit is connected with the overcurrent low-voltage protection circuit and the rectifying circuit; the rectifying circuit is connected with the feedback circuit; the feedback circuit is connected with the overcurrent low-voltage protection circuit; and the feedback circuit adopts an optocoupler to isolate the feedback between the primary power supply and the secondary power supply. The device is applicable to the added, refitted and separated on-board audio-visual devices, and provides a method for reducing audio outputting noise of added, refitted and separated on-board audio-visual devices; and thus, users can perfectly enjoy the audio shock brought by added, refitted and separated on-board audio-visual devices rather than the noise.

Description

Technical field [0001] The invention relates to the technical field of vehicle-mounted audio-visual equipment, in particular to a device for reducing the audio noise of installation, modification and split vehicle-mounted audio-visual equipment. Background technique [0002] With the popularization of car audio and video equipment, there is an increasing number of audio and video equipment retrofits or upgrades in the car. However, because it is retrofit or upgrade, especially when the original car audio and video equipment is retained while adding functions, it will bring a A huge problem is also a problem that plagues many car owners and 4S shops. This problem is that the sound effect is too poor, mainly background noises such as hum, VV, and SS. There is no problem when testing the original vehicle equipment alone, and there is no problem when testing the additional equipment alone. When the two work together, there is a problem. [0003] Due to the particularity of car power s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M1/44H02M3/335
CPCH02M1/44H02M3/33523
Inventor 艾英勇
Owner 艾英勇