KR20080054268A - Car audio system having timer - Google Patents

Abstract

A car audio system with a timer is provided to listen to radio or play a tape or CD at the desired time by transmitting a wake-up signal to a microcomputer through the timer. A car audio system with a timer(4) comprises a tuner(3), a microcomputer(2), a storage part(12), an amplifier(7), speakers(8,14), a key input part(1), and a display part(11). The timer outputs time information input by a user, and a wake-up signal for waking-up the car audio device. The microcomputer receives the time information of the timer and the wake-up signal and controls the tuner to output radio broadcasting of set frequency. The storage part stores the audio signal output from the tuner. The amplifier amplifies the audio signal output from the tuner or storage part. The speakers output the audio signal at the audible frequency. The key input part inputs the time and frequency set by the user. The display part displays the time and frequency set by the user.

Description

Car audio device with timer {CAR AUDIO SYSTEM HAVING TIMER}

1 is an exemplary view of a car audio device according to the prior art.

2 is a block diagram of a car audio device equipped with a timer according to a preferred embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car audio device, and more particularly, to a car audio device provided with a timer capable of listening to a desired radio broadcast at a desired time.

1 illustrates a configuration of a car audio device according to the prior art.

Referring to FIG. 1, a car audio apparatus according to the related art receives a microcomputer 2 that is in charge of overall control of car audio, and an airwave signal broadcast from a broadcasting station as a control signal input from the microcomputer 2 at a set frequency. Tuner section 3 to tune, deck drive section 9 for playing back cassette tapes, CD player section 10 for playing back audio CDs (Compact Disc), tuner section 3, and decks according to the user's choice A function selection and volume adjusting unit 6 for selecting one of the audio signals output from the driving unit 9 and the CD player 10 and adjusting the volume level, and an audio signal output from the function selection and volume adjusting unit 6 Amplifying includes a front speaker 8 and a rear speaker 14 connected to a power amplifier 7 and a power amplifier 7. In addition, the microcomputer 2 is connected with a display unit 11 for displaying the reproduction and additional information of the car audio, and a key input unit 1 for supplying power to the car audio and selecting a mode function.

However, in order to listen to a specific radio broadcast at a specific time, it is very cumbersome and has a problem in safe driving because it is necessary to turn on the radio to listen to a specific broadcast when the driver's watch reaches a predetermined time.

In order to solve the above-mentioned problems, an object of the present invention is to provide a car audio device provided with a timer that can be listened to a desired radio broadcast at a desired time by providing a timer.

In order to achieve the above object, the car audio device for listening to a radio broadcast of a predetermined frequency at a predetermined time according to the present invention comprises a tuner unit for receiving a radio signal; A timer for storing a time input by the user and outputting time information on the time input by the user and a wake-up signal for waking up the control unit; A microcomputer that receives time information of the timer and a wake-up signal and controls the tuner to output a radio broadcast of a frequency designated by the user at a time input by the user; A storage unit which stores an audio signal output by the tuner unit; A power amplifier for amplifying an audio signal output from the tuner or the storage; A speaker for outputting an audio signal amplified by the power amplifier at an audible frequency; And a key input unit for inputting a time and frequency designated by the user; and a display unit for displaying the time and frequency specified by the user.

In addition, the storage unit is preferably an IC having a recording function.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating a car audio device according to a preferred embodiment of the present invention, in which a microcomputer 2 which is in charge of overall control of car audio, and airwaves broadcast from a broadcasting station as a control signal input from the microcomputer 2 are provided. A tuner section 3 for receiving signals and tuning to a set frequency, a deck drive section 9 for playing cassette tapes, a CD player section 10 for playing audio CDs (Compact Disc) and MP3 CDs, and A function selection unit 6 for selecting and outputting one of audio signals output from the tuner unit 3, the deck drive unit 9 and the CD player unit 10, and adjusting the volume level according to the selection; A timer 4 for storing time and outputting time information on the time input by the user, and a power amplifier 7 for amplifying the audio signal output from the function selector 6. .

The function selector 6 is connected to a deck driver 9 for reproducing the tape by the control signal of the microcomputer 2, and the function selector 6 is used to play the CD by the control signal of the microcomputer 2. The CD player 10 is connected. In addition, the microcomputer 2 is connected with a display unit 11 for displaying the playback operation and additional information of the car audio, and also applies a power input to the car audio, and a key input unit for selecting a mode and allowing the user to input time and frequency ( 1) is connected. The power amplifier 7 is connected with a speaker 8 for amplifying and outputting the amplified signal at an audible frequency.

The timer 4 stores the time input by the user, and provides time information about the time input by the user to the microcomputer 2. In addition, only the timer 4 is operated during standby to prevent the battery (not shown) of the vehicle from being discharged. Accordingly, the timer 4 provides the microcomputer 2 with a wake-up signal that wakes up the car audio device such as the microcomputer 2 together with the time information.

The microcomputer 2 receives the time information of the timer 4 and the wake-up signal, and controls the tuner 3 to output a radio broadcast of the frequency specified by the user at a time input by the user.

The audio signal output from the tuner section 3 is stored in the storage section 12. The storage unit 12 is preferably an IC having a recording function including a flash memory and the like.

In addition, the function selection unit 6 of the car audio device according to the preferred embodiment of the present invention includes the microphone 4, the tuner unit 3, the tape recording / reproducing unit 9, and the like described above under the control of the microcomputer 2. One of the signals output from the CD recording / playback section 10 is selected and output. Here, the microcomputer 2 and the function selector 6 described above may be provided in the form of a single chip.

Hereinafter, the operation of the car audio device shown in FIG. 2 will be described.

For example, when the driver operates the key input unit 1 to input time and frequency, the microcomputer 2 stores the time input by the driver in the timer 4. The timer 4 continuously monitors the current time and outputs time information about the current time to the microcomputer 2 when the current time coincides with the time input by the driver. At this time, since all other components of the car audio device except the timer 4 are in a sleep state, the timer 4 transmits a wake-up signal for waking up the car audio device to the microcomputer (). .

The microcomputer 2 controls the tuner 3 and the function selector 6 to output a broadcast of a frequency determined by the driver according to the time information. The function selector 6 outputs the audio signal of the tuner unit 3 under the control of the microcomputer 2, and the output audio signal is stored in the storage unit 12. When the user selects reproduction of the stored audio signal, the stored audio signal is amplified by the power amplifier 7 and output to the speakers 8 and 14.

Although the preferred embodiment according to the present invention has been described above, this is merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the protection scope of the present invention should be defined by the following claims.

As described above, according to the present invention, there is an advantage that a user can listen to a designated radio broadcast or tape or CD at a designated time by having a timer for listening to a desired radio broadcast at a desired time.

Claims (1)

In the car audio device for listening to a radio broadcast of a predetermined frequency at a predetermined time, A tuner unit for receiving a radio signal; A timer for storing a time input by the user and outputting time information on the time input by the user and a wake-up signal for waking up the car audio device; A microcomputer that receives time information of the timer and a wake-up signal and controls the tuner to output a radio broadcast of a frequency designated by the user at a time input by the user; A storage unit which stores an audio signal output by the tuner unit; A power amplifier for amplifying an audio signal output from the tuner unit or the storage unit; A speaker for outputting an audio signal amplified by the power amplifier at an audible frequency; A key input unit for inputting a time and frequency designated by the user; And And a display unit for displaying the time and frequency designated by the user.

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