KR19990012014A - How to dehumidify a car compact disc player - Google Patents

Abstract

The present invention provides a compact disc player for a vehicle that reads and outputs audio information read from a disc, wherein the first disc maintains a standby state for a first set time after stopping playback of the disc when moisture is detected in the disc. step; A second step of rotating the disk for the second set time to remove moisture generated on the disk by centrifugal force generated by the rotation of the disk; And detecting the presence or absence of moisture removal when the second predetermined time elapses, and performing a regeneration of the disk when the moisture is removed.

Description

How to dehumidify a car compact disc player

The present invention relates to a method for dehumidifying a compact disc player for a vehicle, and more particularly, to a method for dehumidifying a compact disc player for a vehicle capable of removing moisture generated on a surface of a disc due to a temperature difference in winter or the like.

With the development of audio and video media, optical disc players have been developed for recording and reproducing video and audio data on semi-permanent optical discs.

Such an optical disc player reproduces video and audio recorded on an optical disc and outputs it through a screen and a speaker, and has a higher signal-to-noise ratio than conventional video and audio playback devices, and thus can reproduce signals with better image quality and sound quality. Noise is not generated by irregular reproduction and modulation, distortion is small, there is no ghost and random access is possible.

In addition, such optical disk players include a compact disk player (CDP), a laser disk player, a compact disk graphic player (CDGP) and a video compact disk player (VCDP). And digital video discs (DVD) using MPEG-2 moving picture compression technology, and digital video disc players for playing them have been developed. It can record and play back gigabytes (GB) of data, including moving images, and is designed to be compatible to play current compact discs and video compact discs.

Meanwhile, among such optical disc players, compact disc players for automobiles are gradually being commercialized according to the consumer's desire for convenience while the compact disc is widely used. The compact disc player for a car has an advantage in that the sound quality is superior to that of a car cassette player and the selection of songs to be listened to is easy.

On the other hand, the conventional compact disc player for a car has a problem of malfunctioning due to condensation which forms moisture on the surface of the disc while the heater is operated after parking in winter for a long time in winter.

Therefore, in order to prevent malfunction due to this condensation, when the moisture is detected on the disk, the playback of the disk is stopped until the moisture is removed.

However, the conventional compact disc player for a car has a problem that it takes a long time to remove moisture accumulated on the disc and the user cannot hear the compact disc.

The present invention has been made to solve the above-mentioned conventional problems, to provide a method for removing moisture in a compact disc player for a car that can quickly remove moisture generated on the surface of the disk due to the temperature difference in winter. There is a purpose.

In order to achieve the above object, the present invention provides a compact disc player for a vehicle that reads and outputs audio information read from a disc. A first step of maintaining a standby state for a time; A second step of rotating the disk for the second set time to remove moisture generated on the disk by centrifugal force generated by the rotation of the disk; And detecting the presence or absence of moisture removal when the second predetermined time elapses, and performing a regeneration of the disk when the moisture is removed.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is an overall block diagram of a compact disc player for a vehicle for carrying out the method of removing moisture of the present invention.

2 is a detailed flowchart illustrating a method for removing moisture of a compact disc player for a vehicle according to an exemplary embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

5: key input section 10: control section

15: optical pickup section 20: RF signal amplification section

25: digital signal processor 30: servo signal processor

35: motor and motor drive part 40: D / A conversion part

45: audio signal processing unit 50: speakers

55: moisture detection unit D: disk

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

1 is an overall block diagram of a compact disc player for a vehicle for carrying out the method for removing moisture of the present invention.

Referring to FIG. 1, an automotive compact disc player amplifies an RF signal of an optical pickup unit 15 and an optical pickup unit 15, which read data of a disc D and output an RF signal, based on a predetermined amplification degree. The tracking servo of the digital signal processing unit 25 and the optical pickup unit 15 that perform error detection, error correction, and demodulation on the RF signal amplified by the RF signal amplifying unit 20, the RF signal amplifying unit 20. And digital voice signals provided by the servo signal processor 30 for controlling the drive of the transfer servo, the motor for stopping or resuming the rotation of the disk D, the motor driver 35, and the digital signal processor 25. An audio signal processor which receives an analog voice signal from a D / D converter 40 and a D / A converter 40 to convert the signal into a signal and outputs the audio signal to the speaker 50. 45, detect the presence of moisture on the disk (D) If moisture is detected on the disc D through the moisture detector 55 outputting the result to the controller 10 and the moisture detector 55 in the playback mode, the playback of the disk D is stopped for a predetermined time. The controller 10 rotates the disk D again to remove moisture accumulated on the disk D by centrifugal force, and the key input unit 5 outputs various key signals selected to perform a desired function by the user to the controller 10. ). FIG. 2 is a detailed flowchart showing a preferred embodiment of the method for removing moisture of the present invention, and the method for removing moisture of FIG. 2 is performed using the compact disc player for a vehicle of FIG. 1 described above. Therefore, the following description will be given with reference to FIGS. 1 and 2.

First, it is checked whether or not moisture is detected on the disc D (S1). If no moisture is detected, the compact disc player for the vehicle shifts to the playback mode S2, and the data (voice information) recorded on the disc D is optically picked up. It is read by the unit 15 and output as an RF signal. The RF signal amplifying unit 20 amplifies the RF signal based on a predetermined degree of amplification and transfers the RF signal to the digital signal processing unit 25.

The digital signal processor 25 then processes the amplified RF signal by digital signal processing and transmits the digital signal to the D / A converter 40. At this time, the D / A converter 40 converts the error-corrected bit stream type digital signal provided from the digital signal processor 25 into an analog signal and outputs the analog signal to the audio signal processor 45. (S2).

Next, the controller 10 controls the moisture detector 55 to determine whether moisture is detected on the disk D (S1), and if the moisture is detected on the disk D, the controller 10 processes the servo signal processor 30. Control to stop the rotation of the disk D. At this time, the servo signal processor 30 stops the operation of the optical pickup unit 15, the motor, and the motor driver 35 under the control of the controller 10 to stop the rotation of the disk D (S3).

As such, when the rotation of the disk D is stopped, the controller 10 counts the time from the time when the rotation of the disk is stopped, and determines whether the current time reaches the first set time. Here, the first setting time is a time for preventing the motor for rotating the disk D and the motor driving part 35 from overheating (S4).

When the current time reaches the first set time in the above-described process S4, the controller 10 controls the servo signal processor 30 to accelerate the rotation of the disk D. FIG. Then, the servo signal processor 30 controls the motor and the motor driver 35 to accelerate and rotate the disk D. FIG. As such, when the disk D rotates, centrifugal force is generated, and moisture remaining on the surface of the disk D is removed by the centrifugal force (S5).

Subsequently, the controller 10 counts the time since the rotation of the disc D continues and determines whether the current time reaches the second set time (S6). If the current time does not reach the second set time, the disc ( The servo signal processing unit 30 is controlled so that D) continues to rotate.

However, when the current time reaches the second set time in step S6, the controller 10 stops the rotation of the disk D (S7) and checks again whether the moisture of the disk D is detected (S1), so that moisture If it is removed, the process returns to the disc playback mode S2 and if the moisture is not removed, the above process is repeated. In this way, when the moisture is removed, the regeneration mode is performed. When the moisture is detected during the regeneration mode (S2), the above process is performed again.

As described above, the method for removing moisture of a compact disc player for a vehicle according to the present invention can quickly remove moisture generated on a surface of a disc due to a temperature difference in winter, and thus prevent the compact disc player from malfunctioning. There is an effect that can be planned.

While the invention has been shown and described with respect to certain preferred embodiments, it will be apparent to those skilled in the art that various modifications, changes and omissions can be made without departing from the spirit and scope of the invention.

Claims (1)

In a compact disc player for a vehicle that reads and outputs audio information read from a disc, A first step of stopping the play of the disc and maintaining a standby state for a first set time when moisture is detected in the disc; A second step of rotating the disk for the second set time to remove moisture generated on the disk by centrifugal force generated by the rotation of the disk; And a third step of performing a regeneration of the disc (D) if the moisture is removed by detecting the presence or absence of moisture removal when the second set time elapses.