KR200279847Y1 - A speaker system with wireless FM audio transmitter - Google Patents

Abstract

The present invention relates to a speaker system for outputting an audio signal as an audible signal, and to a speaker system having a separate transmitting device capable of transmitting an audio signal in a wireless FM system.

According to the present invention and the audio speaker constituting a general speaker system; A speaker system is provided, comprising: an FM audio transmitter for wireless FM audio transmission.

Therefore, the AV device provided with an FM radio receiver by modulating the audio signal in the speaker to the FM signal through the device of the present invention; It is possible to provide a speaker system with a built-in wireless FM transmitter for listening to audio signals using a portable FM radio or a headphone with a built-in FM receiver.

Description

Speaker system with a built-in wireless FM audio transmitter

The present invention relates to a speaker system including a wireless FM audio transmission function, and more particularly, to a speaker system incorporating a transmission device capable of wirelessly transmitting an input audio signal in an FM manner in addition to the functions of a general speaker.

In general, a speaker system converts an electric audio signal directly into an audible signal to transmit sound, or amplifies an audio signal electrically through an internal amplifier, and then delivers it as an audible signal.

The conventional speaker system as described above has caused a lot of inconvenience in installation and use because a separate physical line is required to provide various functions such as additional expansion of the speaker and listening to headphones according to the user's preference.

As a known conventional technology for solving this problem, "Application No. 10-1999-0022215, Title of the invention: Audio signal wireless transmitter for personal computer" is proposed.

It is powered through the input and output ports of the personal computer, and modulates the stereo audio output of the computer to be transmitted through an antenna and receives this frequency signal through a conventional universal radio receiver. The present invention provides an audio signal wireless transmission apparatus for listening to an audio signal reproduced in the present invention.

However, according to the prior art as described above, anyone can easily attach to the personal computer (PC) peripheral input and output port to provide PC stereo audio output to the FM broadcasting band without deterioration of sound quality without a separate power supply device by FM stereo modulation method However, the configuration of the system is complicated, and it is not easy to manufacture the device, and the external appearance of the audio signal wireless transmitter is exposed to the outside.

Therefore, the present invention was created to solve the above problems, and an object of the present invention is to incorporate a wireless FM audio transmission device into a speaker, so that, in addition to the basic speaker output, an AV device having a built-in FM radio receiver; Headphones or an additional speaker with an FM audio receiver; and the like to realize a speaker system that can listen to the radio wirelessly without installing a separate physical line.

In order to achieve the above object, the present invention provides a speaker 118 capable of performing a function of a general speaker as shown in FIG. 1;

A wireless FM audio transmitter 102 capable of FM modulating and transmitting an audio signal at a stable frequency by applying a local oscillator 112 to which a PLL is applied to control a transmission frequency;

And a control device 114 for controlling the audio output of the speaker, the wireless FM audio transmission control, and the FM transmission frequency control. The wireless FM audio includes both a function of a general speaker and an FM wireless transmission function of an audio signal. A speaker system with a built-in delivery device was devised.

1 is a block diagram of a speaker system incorporating a wireless FM audio transmitting device according to the present invention.

2 is an application diagram when a speaker system incorporating a wireless FM audio transmitting device according to an embodiment of the present invention is used as a speaker of a multimedia computer.

3 is a diagram illustrating an application of a 5.1-channel speaker system to which a built-in wireless FM audio transmitter speaker structure according to an exemplary embodiment of the present invention is applied.

<Description of Symbols for Major Parts of Drawings>

100: audio input terminal 102: wireless FM audio transmission device

104: FM modulator 108: high frequency amplifier

110: band pass filter 112: local oscillator

114: control unit 116: audio amplifier

118: speaker 120: antenna

200: multimedia computer 202: FM audio transmission speaker

204: FM receiver built-in speaker 300: Audio input terminal

302: Woofer Speaker 304: Center Speaker

306,307: Front speaker 310,312: Rear speaker

Hereinafter, with reference to the embodiment of the present invention will be described in detail the configuration and operation of the present invention.

1 is a block diagram of a speaker system incorporating a wireless FM audio transmitter.

Referring to FIG. 1, first, when operating as a general speaker system, the controller 114 activates the audio amplifier 116 and deactivates the wireless FM audio transmitter 102. Thereafter, the audio signal input through the input terminal 100 is amplified by the audio amplifier 116 and then output as an audible signal through the speaker 118.

Next, when operating as a speaker system having a wireless audio transmission function, it performs wireless FM audio transmission simultaneously with its own speaker output; You can break down your own speaker output and only perform wireless FM audio playback.

When performing wireless FM audio transmission simultaneously with its own speaker output as in the former, both the audio amplifier 116 and the wireless FM audio transmission device 102 are activated by the control device. The audio signal input from the input terminal 100 is amplified by the audio amplifier 116 and output to the speaker 118, while the radiation frequency selected by the controller 114 and the local oscillator 112 in the FM modulator 104 And then modulated and mixed, and amplified in the high frequency amplifier 108. The signal amplified by the high frequency amplifier 108 is purified by the bandpass filter 110 and transmitted through the antenna 120.

In addition, in the latter case, when the self-speaker output is stopped and only wireless FM audio transmission is performed, the audio amplifier 116 is deactivated by the control unit 114 to stop its own speaker output, and only the wireless FM audio transmission device 102 is provided. It is activated. Thus, as in the former, the audio signal input from the input terminal 100 is FM modulated and mixed according to the radiation frequency selected by the control unit 114 and the local oscillator 112 in the FM modulator 104. As described above, the high frequency modulated audio signal is amplified by the high frequency amplifier 108 and refined by the band pass filter 110 and transmitted through the antenna 120.

In the block diagram shown in FIG. 1, one input terminal 100 is shown as an input of both the internal audio amplifier 116 and the wireless FM audio transmitter 102, but this is separated into a plurality of input terminals, respectively, as necessary. A signal directly output through the amplifier 116 and an audio signal transmitted through the wireless FM audio transmitter 102 may be separately used.

In addition, the wireless FM audio transmitting device 102 can select the FM audio transmitting frequency by allowing the oscillation frequency of the local oscillator 112 to be changed using PLL control.

In addition, the audio amplifier 116 may be selectively installed according to the case where the implementer of the present invention needs to amplify the audio signal and when it is not necessary. As described above, the configuration of the audio input or the installation of the audio amplifier can be selectively implemented according to the application of the practitioner of the present invention, and thus the description thereof will be omitted.

The purpose and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.

2 is a preferred embodiment when the present invention is applied to a speaker connected to a sound card of a multimedia computer.

As shown in FIG. 2, the speaker system 202 according to the present invention is connected to a sound card of the multimedia computer 200 and outputs an audio signal. The speaker system 202 transmits the audio signal by using a wireless FM method. When you want to listen to the audio signal using the FM radio receiver built-in headphones 204 can be conveniently listened to wireless. At this time, the direct output through the speaker can be controlled through the internal control device.

3 is a preferred embodiment when the present invention is applied to the 5.1-channel multimedia speaker system to remove the connection line of the rear speaker.

As shown in FIG. 3, the woofer 302, the center speaker 304, and the front speakers 306 and 308 positioned in front of the user are connected to the audio source by a wire 300. One speaker of the present invention has a built-in wireless FM audio transmitter as proposed in the present invention and transmits an audio signal to the rear speakers 310 and 312 located at the rear of the user and difficult to connect with a physical line. Accordingly, the rear speakers 310 and 312 having the built-in FM radio receiver receive the FM audio signal transmitted from the speaker and transmit it as an audible signal. With the configuration as described above, it is possible to implement a 5.1-channel multimedia speaker that can be used to install the rear speaker freely without having a physical wire.

Although the present invention has been described above based on the preferred embodiments, these embodiments are intended to illustrate rather than limit the present invention. It will be apparent to those skilled in the art that various changes, modifications, or adjustments to the above embodiments can be made without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention will be limited only by the appended utility model registration claims, and should be construed as including all such changes, modifications or adjustments.

As described above, the speaker system incorporating the wireless FM audio transmitter according to the present invention has a built-in wireless FM transmitter of the audio to perform wireless audio transmission together with the original speaker function, so that the user can listen through the original speaker. In addition, AV devices with built-in FM radio receivers, headphones and speakers can be used to easily listen to audio wirelessly.

In addition, in the recent spotlighted multi-channel multimedia speaker, it is possible to provide convenience by replacing the speaker of the position which is not easy to install with a wireless speaker due to the limitation of the wire.

Claims (2)

A speaker 118 for outputting audio signals from an input terminal at an audible frequency; An FM modulator (104) for FM modulating the input audio signal and mixing it with a transmission frequency selected by a local oscillator (112); A high frequency amplifier (108) for amplifying the FM modulated signal; A band pass filter (110) for purifying the amplified signal; A wireless FM audio transmitter (102) having an antenna (120) for finally transmitting the amplified signal; And a control device (116) for the operation of the wireless FM audio transmission device (102) and the transmission frequency control. The wireless FM audio transmitter according to claim 1, wherein the wireless FM audio transmitter 102 selects an FM audio transmitter frequency by allowing the oscillation frequency of the local oscillator 112 to be changed using PLL control. Built-in speaker system.