KR200243318Y1 - Television tuner for car - Google Patents

Abstract

The present invention relates to a vehicle television tuner (100), a vehicle television tuner (100) consisting of a tuner (110) and an IF (120) for receiving a high frequency of an airwave channel through an antenna and displaying it on a television (200) in a vehicle. A video input unit 131 and an audio input unit 132 for receiving video and audio signals of the airwave channel or game machine, and a channel switch unit for outputting a channel control signal for the airwave channel and an RF output signal of the game machine ( 133, an RF carrier oscillator 134 for generating a carrier signal of the selected channel frequency by the channel control signal, and an image modulator for modulating the video signal through the image input unit 131 with respect to the oscillated carrier signal; 135, a voice modulator 136 for frequency modulating the voice signal input through the voice input bar 132 with respect to the oscillated voice frequency, and the airwave channel. A path switch 138 for controlling the path of the RF signal, and a mixing unit 139 for converting and amplifying the modulated video and audio signals into 3 to 4 channel signals and outputting the signals to the television 200. It characterized in that the modulator 130 is connected to the tuner 110, it is possible to facilitate additional game execution in addition to watching television in the vehicle, and the game machine in the vehicle because the modulator is mounted on the television tuner itself You can solve the inconvenience of having to use a separate module when connecting.

Description

Television tuner for car {Television tuner for car}

The present invention relates to a vehicle television tuner, and more particularly, by installing a modulator (modulator) that modulates and outputs all input signals into a television signal to an existing television tuner, in addition to watching television through airwave reception in a vehicle, A vehicle television tuner that enables additional execution of a game via a connection.

All vehicles, including cars, already occupy a significant part of our daily lives. As a result, the technology has been developed and the interests of people are increasing as the technology for solving the cultural thirst in the vehicle goes beyond the function of the vehicle as a simple means of riding or transporting goods. (AV) system.

The vehicle AV system uses a vehicle television tuner as a main component, and the vehicle television tuner selects and amplifies a desired radio wave from a received radio wave of high frequency (VHF) and ultra high frequency (UHF) and converts it into an intermediate frequency signal. And an IF (Intermediated Frequency) for amplifying the converted intermediate frequency signal and outputting video and audio.

However, the conventional vehicle television tuner as described above cannot be used except for the reception of high and ultra high frequency bands due to the simple configuration of the tuner and the IF, so that it is not possible to enjoy additional cultural benefits other than watching television, and if the game is in a vehicle, Even if you use a game console to enjoy the inconvenience of having to use a separate module (module).

The present invention has been proposed to solve the above problems, and its purpose is to control the frequency of the airwave channel received through an antenna and modulate the video and audio signals to an existing vehicle television tuner consisting of a tuner and an IF. By connecting and installing a modulator that amplifies and outputs a television signal, it is possible to play an additional game in addition to watching TV in a vehicle and to solve the inconvenience of using a separate module when connecting a gain machine. have.

1 is a schematic overall configuration diagram for explaining a vehicle television tuner according to the present invention. FIG. 2 is a block diagram illustrating an entire vehicle television tuner according to the present invention in detail.

Explanation of symbols on the main parts of the drawings

100: car television tuner 110: tuner

120: IF 130: modulator

131: video input unit 132: audio input unit 133: channel switch unit 134: RF carrier oscillator 135: video modulator 136: audio modulator 137: sound oscillator circuit 138: path switch 139: mixing unit 200: television

The present invention for achieving the above object is a tuner for amplifying the signal and converting the signal into a medium frequency signal to select the desired frequency signal from the received radio wave of the high frequency and ultra-high frequency, and is connected to one side of the tuner through a tuner In the vehicle television tuner which is composed of an IF for extracting the video and audio signals of the converted intermediate frequency signal to output the video and audio signals to a television installed in the vehicle, the television can be watched, connected to the other side of the tuner, The video input and audio input signal for receiving the video and audio output signal of the airwave channel through the IF or the game device itself when connecting the game machine, the channel control signal for the selected channel through the tuner and IF A channel switch unit for outputting an RF output signal, and the channel switch An RF carrier oscillator for generating and outputting a carrier signal for a channel frequency or an RF output signal of a game machine selected by the channel control signal output through the modulated video signal input through the image input unit, wherein the RF carrier is outputted. An image modulator for modulating the carrier signal output from the oscillator and a voice modulator for modulating the voice signal input through the voice input unit, and outputting the modulated voice signal for frequency modulation with respect to a frequency of 4.5 MHz generated by the sound oscillator circuit. And a path switch for controlling the path of the RF signal for the airwave channel received by the tuner, and receiving the modulated video and audio signals through the video modulator and the voice modulator. A modulator consisting of a mixing section that amplifies and outputs the signal to the television And that where the basic features on the technical configuration.

Referring to the preferred embodiment of the present invention configured as described above in detail with reference to the drawings as follows.

1 is a schematic overall configuration diagram illustrating a vehicle television tuner according to the present invention, and FIG. 2 is a block diagram illustrating the detailed vehicle television tuner according to the present invention in detail.

1 and 2, the vehicle television tuner 100 according to the present invention selects a desired frequency signal from a received radio wave of high frequency (VHF) and ultra high frequency (UHF), amplifies the signal, and converts the signal into an intermediate frequency signal. A tuner 110 for converting, an IF 120 connected to one side of the tuner 110 to extract and output an image and an audio signal among the intermediate frequency signals converted through the tuner 110, and the tuner 110 Is connected to the other side of the) and the video and audio signals output through the IF 120 or when connecting the game machine receives the video / audio signal and the RF output signal of the game machine itself to modulate the television signal of 3 to 4 channels The tuner 110 includes a VHF RF amplifier 111, a UHF RF amplifier 112, a UHF mixer 113, and amplified by the modulator 130. UHF Oscillator 114, VHF Oscillator 115, Mixing And an IF amplifier 117 and a phase locked loop (PLL) circuit 118. The VHF RF amplifier 111 receives and amplifies the RF signal of the VHF in an airwave channel and then amplifies the amplified RF signal. The UHF RF amplifier 112 receives the amplified RF signal of the UHF, amplifies the RF signal, and then outputs the amplified RF signal to the UHF mixer 113. 113 receives a signal output from the UHF RF amplifier 112 and the UHF oscillation signal generated by the UHF oscillator 114 to mix the two signals and output the mixture, the VHF oscillator 115 is an intermediate frequency signal Generates the VHF oscillation signal required to make the output to the mixed circuit 116. The mixed circuit 116 converts the amplified RF signal of the VHF and UHF into an intermediate frequency signal, the IF amplifier circuit 117 Receives an intermediate frequency signal from the mixing circuit 116 and amplifies the intermediate frequency signal. The forward loop circuit 118 receives VHF and UHF oscillation signals to reduce oscillation frequency and phase difference to stabilize the frequency. Meanwhile, the IF 120 is a surface acoustic wave filter (SAW) 121 and an image detector 122. ), Sound IF filter 123, FM detector 124, automatic fine adjustment circuit (AFT) 125, and automatic gain adjuster (AGC); The surface acoustic wave filter 121 passes only a desired frequency component among the amplified intermediate frequency signals from the IF amplifier circuit 117. The image detector 122 transmits the surface acoustic wave filter 121. The sound IF filter 123 passes only the frequency components of the audio signal. The FM detector 124 receives the sound signal passing through the sound IF filter 123. The automatic fine adjustment circuit 125 adjusts the output of the image signal passing through the image detector 122 and outputs it, and minimizes an error during tuning. 126 automatically adjusts the signal gain of the VHF RF amplifier 111 and the UHF RF amplifier 112. The modulator 130 includes an image input unit 131, an audio input unit 132, and a channel. Switch unit 133, RF carrier oscillation unit 134, zero And a modulator 135, a voice modulator 136, a sound oscillator 137, a path switch 138, and a mixer 139. The image input unit 131 and the voice input unit 132 are the IFs. Video and audio output signals of the airwave channel through the 120 or the video and audio output signals of the game console itself when the game machine is connected. The channel switch unit 133 is selected through the tuner 110 and the IF 120. And outputs a channel control signal for the channel and an RF output signal of the game machine when the game machine is connected. The RF carrier oscillator 134 generates a carrier signal for the channel frequency selected by the output control signal or the RF output signal of the game machine. The image modulator 135 modulates the image signal input through the image input unit 131 and outputs the modulated image signal. The image modulator 135 modulates the carrier signal output from the RF carrier oscillator 134. 136 is voice The audio signal input through the unit 132 is modulated and output, but the frequency signal is modulated with respect to the frequency of 4.5 MHz generated through the sound oscillation circuit 137. The path switch 138 is an RF signal received through an antenna. It controls the path of the TV, and when the television is received (ON) to send the received RF signal to the tuner 110, and when the game console is connected (OFF) to send out the RF signal of the airwaves received through the antenna immediately out The mixer 139 receives the modulated video and audio signals through the image modulator 135 and the voice modulator 136, converts and amplifies the signals into three to four channel signals, and converts them into the television 200. In this case, the television reception through the reception of the airwave channel may cause the video and audio signals output through the tuner 110 and the IF 120 to be directly output to the television 200. Voice signal and The selected channel frequency may be input through the image input unit 131 / audio input unit 132 and the channel switch unit 133 of the modulator 130, and then modulated the signal to be output to the television 200. When the game machine is connected, the video and audio outputs of the game machine itself are input to the video input unit 131 and the voice input unit 132 of the modulator 130, and the RF output signal of the game machine is input to the channel switch unit 133. By modulating and amplifying the video and audio signals, the signals are sent to the television 200 for output, thereby facilitating not only watching television in a vehicle but also playing games using a game machine.

As described above, according to the vehicle television tuner according to the present invention, an existing vehicle television tuner consisting of a tuner and an IF controls the frequency of an airwave channel received through an antenna, modulates and amplifies video and audio signals, and outputs them as a television signal. By connecting and installing a modulator, it is possible to facilitate additional game execution in addition to watching television in a vehicle. Since the modulator is mounted on the TV tuner itself, it is inconvenient to use a separate module when connecting a game machine in a vehicle. There is usefulness to solve.

Claims (1)

A tuner 110 that selects a desired frequency signal from a received radio wave of a high frequency (VHF) and an ultra high frequency (UHF), amplifies the signal and converts the signal into an intermediate frequency signal, and is connected to and mounted on one side of the tuner 110. A vehicle television tuner (100) comprising an IF (120) for extracting and outputting video and audio signals from the intermediate frequency signals converted through the 110 to send a video and audio signal to a television 200 installed in a vehicle. ), It is connected to the other side of the tuner 110, An image input unit 131 and an audio input unit 132 for receiving an image and audio output signal of an airwave channel through the IF 120 or a game machine itself when receiving a video and audio output signal; A channel switch unit 133 for outputting a channel control signal for the selected channel and the RF output signal of the game machine through the tuner 110 and the IF 120; An RF carrier oscillator 134 for generating and outputting a carrier signal corresponding to a channel frequency selected by the channel control signal output through the channel switch unit 133 or an RF output signal of a game machine; An image modulator 135 for modulating and outputting an image signal input through the image input unit 131, but modulating the carrier signal output from the RF carrier oscillator 134; A voice modulator 136 configured to modulate the voice signal input through the voice input unit 132 and output the modulated signal with respect to a frequency of 4.5 MHz generated through the sound oscillation circuit 137; A path switch 138 for controlling a path of an RF signal for an airwave channel received by the tuner 110; A mixing unit for receiving the modulated video and audio signals through the image modulator 135 and the voice modulator 136, converting and amplifying the signals into three to four channel signals and outputting the signals to the television 200 ( Vehicle tuner, characterized in that further comprises a modulator (130) consisting of 139.