JP2955416B2 - Optical disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reading and reproducing an optical disk such as a compact disk.

[0002]

2. Description of the Related Art Conventionally, a so-called CD for reproducing a compact disk (abbreviated to CD) which is an optical disk.
In the player, a temperature detecting element is provided therein, and when the temperature detected by the temperature detecting element is lower than a predetermined value, the compact disc is kept rotating, and the heat of the motor driving the compact disc, and The temperature rises due to the heat of a light source such as a laser diode used for reading a compact disc and further from the electric circuit such as an amplifier circuit, and the temperature detected by the temperature detecting element exceeds a predetermined temperature. When the temperature becomes high, the operation is automatically stopped, and the reproduction of the compact disc is continuously stopped until the temperature decreases. This prevents a laser diode and a synthetic resin lens for laser light from being damaged by heat.

[0003]

In such a prior art, when the temperature detected by the temperature detecting element in the CD player is equal to or higher than the predetermined value, the operation is stopped. Therefore, when a compact disc stores audio signals such as music, it cannot be played back, of course,
Even when a signal other than an audio signal is stored and used as a so-called CD-ROM, the operation remains stopped, which is inconvenient.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a failure due to a rise in temperature, and to improve usability by minimizing inconvenience by reading signals other than acoustic signals even when the temperature rises. It is an object of the present invention to provide an optical disk reproducing apparatus which can perform the above-mentioned operations.

[0005]

According to the present invention, there is provided a driving means for rotating an optical disk on which information is recorded, and a reading means for reading information from the optical disk rotated by the driving means. In a reproducing apparatus of an optical disc for reproducing information other than acoustic information from the optical disc,
Input means for instructing reading of information on the optical disk, temperature detecting means for detecting a temperature near the reading means, and when the temperature detected by the temperature detecting means is lower than a predetermined temperature, A drive control unit for controlling the drive unit so as to maintain the rotation drive of the optical disk; and a read command operation by the input unit is performed when the temperature detected by the temperature detection unit is equal to or higher than a predetermined temperature. An optical disk reproducing apparatus, comprising: a control unit that drives the driving unit and the reading unit until the reading operation is completed only when the reading operation is completed.

According to another aspect of the present invention, there is provided an optical disk reproducing apparatus having a driving unit for driving an optical disk to rotate and a reading unit for reading information from the optical disk rotated by the driving unit. Input means for performing a read command operation, temperature detecting means for detecting a temperature near the reading means, and when the temperature detected by the temperature detecting means is equal to or higher than a predetermined temperature, information to be read is acoustic information. In this case, the operation of the driving means and the reading means is prohibited, and when the information to be read is information other than audio information, the driving means and the reading means are operated by the reading command operation by the input means until the reading operation is completed. And a control means for causing the optical disc to reproduce.

[0007]

As described above, the optical disk reproducing apparatus described in claim 1 is suitable for use in vehicles.
An optical disk such as a compact disk is used as a so-called CD-ROM, and stores map information for allowing a user to know a traveling place of an automobile and the like. If the temperature is lower than the predetermined temperature and the temperature is low, the optical disk is kept rotating at all times, so that when the readout operation of the desired information is performed by the input means, the desired information can be reproduced and read out immediately. . If the temperature detected by the temperature detecting element is equal to or higher than a predetermined value, for example, 80 ° C., the optical disk is driven only when a read command operation is performed by the input means and the desired information is read. The read operation is performed by the optical pickup means and the movement control means by being rotationally driven by the source. The time required to read such desired information from the optical disk is, for example, about 2 to 3 seconds, and is a short time, so that the temperature rise caused by this is small enough to be negligible. Therefore, it is possible to improve usability while suppressing a rise in temperature.

The following operation is performed when an acoustic signal such as a music tune is stored on the optical disc or map information such as a running position of a car is stored on the optical disc. That is, when the temperature detected by the temperature detecting element is less than a predetermined value, the optical disk is kept rotating when the acoustic signal is stored in the optical disk, and the optical disk is used to store map information or the like. When a signal other than an acoustic signal is stored in the optical disk, the optical disk is kept rotationally driven,
Alternatively, the read operation is performed by driving the rotation only when the read command operation is performed by the input means. When the detected temperature is equal to or higher than a predetermined value, when the audio signal is stored in the optical disk, the reproduction is stopped, and a signal other than the audio signal is stored in the optical disk. When the read command operation is performed by the input means, the read operation is performed only for a period of reading the desired information, and after the read of the desired information is completed, the drive source of the optical disk, And pause the movement control means,
The read / reproduce operation is stopped.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention. In a so-called in-vehicle CD player mounted on a car, a driver 1 is provided, and an optical disc 2 which is a compact disc used as a CD-ROM is reproduced, and a visual display means 3 displays a running position of the car. The optical disk 2
When a sound signal such as a music song is stored in the speaker 4, the sound can be reproduced by the speaker 4.

The deck 5 of the driver 1 is provided with a drive source 6 such as a motor for driving the optical disk 2 to rotate. The stored contents of the optical disk 2 to be rotated are read by the optical pickup means 7. The optical pickup means 7 is moved by the movement control means 8 to perform tracking control and the like, and read and reproduce. The optical pickup means 7 includes a laser diode for irradiating the optical disk 2 with a laser beam, a light receiving element for receiving the laser beam reflected by the optical disk 2, and a synthetic resin lens for focusing the laser beam. And so on.

In the vicinity of the deck 5, a temperature detecting element 9 is provided. Temperature T detected by temperature detecting element 9
However, if the temperature is equal to or higher than a predetermined temperature T1, for example, 80 ° C., the optical pickup means 7 and the like may be damaged by heat, and the present invention is implemented to solve this problem. The driver 1 includes a processing circuit 10 realized by a microcomputer or the like.

The optical disk 2 which is a compact disk used for checking the running position of the vehicle stores map information, and the current position of the vehicle detected by the position detecting means 11 is realized by a microcomputer or the like. To the processing circuit 12 to be executed. The output of the input means 13 is provided to the processing circuit 12. The input means 13 is for performing a command operation for reading out desired information of the optical disc 2, and a map from the optical disc 2 read and reproduced by the input means 13 is displayed on a display means driven by a drive circuit 14. The current position of the car is displayed on the map displayed on the display means 3.

The processing circuit 10 is provided with an input means 15. When an audio signal such as a music tune is stored in the optical disk 2, the audio signal is stored in the optical disk 2 by selecting the audio signal. The read command operation of the sound signal is performed. The acoustic signal read from the optical disc 2 is amplified by the amplifier circuit 16 and is acousticized by the speaker 4.

FIG. 2 is a flowchart for explaining the operation of the embodiment shown in FIG. The process proceeds from step a1 to step a2, where it is determined whether the temperature T detected by the temperature detecting element 9 is lower than a predetermined temperature T1. This predetermined temperature T1 may be, for example, 80 ° C. as described above. In step a2, when the detected temperature T is lower than the predetermined temperature T1, the process proceeds to step a3, in which the deck 5 of the optical disk 2 is operated to perform a continuous reproducing operation. That is, the optical disk 2 is kept rotating and driven by the motor 6, the optical pickup means 7 is always focused on the optical disk 2, and the movement control means 8 is activated. If a read command operation is performed from the input means 13 or 15 in this state, it is possible to immediately read desired map information or an acoustic signal such as a desired music piece without delaying the read operation.

If it is determined in step a2 that the detected temperature T is equal to or higher than the predetermined temperature T1, step a
4, the optical disk 2 loaded in the deck 5 is a compact disk storing audio signals or a CD-ROM storing map information.
It is determined whether it is a ROM. If it is determined that the optical disc 2 stores map information or the like and the disc is a so-called CD-ROM, the process proceeds from step a4 to step a6. Is activated, whereby the drive source 6 drives the optical disc 2 to rotate. In step a7, the optical pickup means 7 is moved by the movement control means 8 to read data such as map information stored in the optical disc 2. I will. In step a8, the input unit 1
It is determined by step 3 whether or not all of the information for which the read command has been operated has been read from the optical disk 2. When the reading has been completed, the process proceeds to step a9 where the deck 5 is deactivated and stopped.

As described above, when information such as a map is stored in the optical disk 2, and thus the optical disk 2 is a so-called CD-ROM, the operations in steps a6 to a9 are performed for, for example, two to three seconds. Done in As a result, the temperature rise of the driver 1 due to the activation of the deck 5 is negligible or negligible.
Therefore, failure due to heat of the deck 5 and the like can be prevented, and the information on the optical disk 2 can be read out by operating the input means 13, so that the usability is good.

The optical disk 2 loaded on the deck 5
Is an optical disc 2 such as a compact disc in which an acoustic signal is stored, the process proceeds from step a4 to step a5, and the deck 5 remains stopped, that is, the drive source 6 is stopped, and the optical pickup means 7 and the movement control means 8 remain at rest. This prevents the temperature of the driver 1 from rising.

As described above, when the deck 5 is stopped in steps a9 and a5, and the temperature in the driver 1 decreases and the detected temperature T becomes lower than the predetermined temperature T1, the reproduction can be performed again in step a3. Become.

As another embodiment of the present invention, the driver 1 may be a model dedicated to reading the optical disk 2 which is a CD-ROM. At this time, the driver 1 reads the optical disk in which the acoustic signal is stored. The input means 15, the amplifier circuit 16, and the speaker 4 may be omitted.

In the above embodiment, the optical disk 2 is a CD
A configuration such that when the detected temperature T is lower than a predetermined temperature T1, the optical disk 2 is kept rotationally driven by the drive source 6 and the optical pickup means 7 and the movement control means 8 are operated. However, as another embodiment of the present invention, the drive source 6 is activated and the optical disc 2 is driven to rotate only when the read command operation is performed by the input means 13, and the optical pickup means 7 and the movement control are performed. The contents of the optical disk 2 may be read out by the operation of the means 8, and after the reading is completed, the deck 5 may be set to the rest state again.

[0021]

As described above, according to the present invention, the CD-R
In a device capable of reproducing an optical disc storing, for example, map information other than acoustic signals, such as OM, when the temperature detected by the temperature detecting element is less than a predetermined value, for example, 80 ° C.
The optical disk is continuously rotated and driven by the drive source, so that when a read command operation is performed by the input means, information on the optical disk can be quickly read.

When the temperature detected by the temperature detecting element is equal to or higher than the predetermined value, a read command operation is performed by the input means, and the optical disk is rotated by the drive source only when desired information is to be read. Driving, reading the desired information by the optical pickup means and the movement control means, and after this reading, a driving source,
The optical pickup means and the movement control means are kept at rest. Therefore, when the detected temperature is low, desired information can always be read, and even when the temperature detected by the temperature detecting element is equal to or higher than the predetermined value as described above, the reading operation is performed. ,
This read operation is generally performed in a short time, for example, two to three seconds, so that the temperature is prevented from rising, and a failure due to heat can be prevented.

According to the present invention, when the detected temperature is lower than the predetermined value, the optical disk is kept rotationally driven when an acoustic signal such as music is stored in the optical disk, The acoustic signal can be continuously read out and reproduced by the optical pickup means and the movement control means. When signals other than acoustic signals, such as map information, are stored in the optical disk, the optical disk may be rotated and kept in a read state, or a read command operation may be performed by input means. The optical disk may be driven to rotate by the drive source and reproduced by the optical pickup means and the movement control means only when the optical disk is rotated. In particular, by keeping the optical disk kept rotating, the read response by the input means can be improved. Speed can be improved.

When the detected temperature is equal to or higher than the predetermined value, when the acoustic signal is stored in the optical disk, the drive of the optical disk by this drive source is stopped, and the optical pickup means and the movement control means are stopped. Leave at rest to prevent temperature rise. Further, when information other than acoustic signals such as map information is stored in the optical disk, only when a read command operation is performed by the input means, the optical disk is rotationally driven by the driving means, and the optical pickup means and After the reading of the desired information in the optical disk is completed, the rotation of the optical disk by the drive source is stopped, and the optical pickup means and the movement control means are stopped, and thus the temperature is read. Prevent the rise and prevent the occurrence of failure due to heat. The time required for reading and reproducing such map information other than the acoustic signal from the optical disk is a short time of, for example, 2 to 3 seconds, so that a further increase in temperature is suppressed.

[Brief description of the drawings]

FIG. 1 is an overall block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Driver 2 Optical disk 3 Visual display means 4 Speaker 5 Deck 6 Drive source 7 Optical pickup means 8 Movement control means 10, 12 Processing circuit 13, 15 Input means

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) G11B 7/00 G11B 19/04 501 G11B 19/12 501 G11B 33/14

Claims (2)

(57) [Claims] An optical disk on which information is recorded; a driving unit for rotating the optical disk; and a reading unit for reading information from the optical disk rotated by the driving unit. In a reproducing apparatus of an optical disk for reproducing information, an input unit for performing a command operation for reading information of the optical disk, a temperature detecting unit for detecting a temperature near the reading unit, and a temperature detected by the temperature detecting unit. If the temperature is less than a predetermined temperature, drive control means for controlling the drive means to maintain the rotation drive of the optical disk, if the temperature detected by the temperature detection means is equal to or higher than a predetermined temperature Controlling means for operating the driving means and the reading means until the reading operation is completed only when a reading command operation is performed by the input means. Reproducing apparatus of the optical disk, wherein obtaining. 2. An optical disk reproducing apparatus comprising: a driving unit for driving an optical disk to rotate; and a reading unit to read information from the optical disk rotationally driven by the driving unit. Input means for performing an operation, temperature detecting means for detecting a temperature near the reading means, and when the temperature detected by the temperature detecting means is equal to or higher than a predetermined temperature, the information to be read is acoustic information. Control means for inhibiting the operation of the driving means and the reading means, and operating the driving means and the reading means by the reading instruction operation by the input means until the reading operation is completed when the information to be read is information other than the acoustic information; An optical disc reproducing apparatus, comprising: