KR960011297B1 - Disc discriminating apparatus and method for laser disc player - Google Patents

Abstract

The apparatus and method discriminates whether the loaded disc is a compact disc(CD) or a laser disc(LD) and the compact disc is overlapped with the laser disc so that it can prevent the damage of the discs or the player. The apparatus comprises: a 1st sensor(2), installed at a side of a clamp chassis(1), sensing the disc loaded in a tray; a 2nd sensor(12), installed at a turn table(6) sensing a disc clamp(8); a microprocessor(4) discriminating the disc kind or the overlapping state based on the signals of the two sensors(2,12); a displayer(13) displaying the disc overlapping state.

Description

Disc Discrimination Device and Method of Laser Disc Player

1 is a main configuration diagram of a laser disc player having a conventional disc discrimination apparatus.

2 is a circuit diagram showing a state of disc discrimination by a conventional disc discrimination apparatus.

3 is a main configuration diagram of a laser disc player having the disc discrimination apparatus of the present invention.

4 is a flowchart for explaining an operating state of a laser disc player having the disc discrimination apparatus of the present invention.

5 is a circuit diagram showing a state of disc discrimination by the disco discriminating apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: Clamp chassis 2: 1st detection sensor

3: disc 4: micom

6: turntable 8: CD clamp

12: second detection sensor 13: display unit

The present invention relates to a disc discrimination apparatus and method for a laser disc player, and more particularly, to distinguish between an LD and a CD, in addition to a basic function of determining whether a disc to be played is an LD or a CD. It is to enable additional functions.

In general, a laser disc player is a device for reproducing sound recorded on the recording medium by using a laser disc (hereinafter referred to as LD) and a compact disc (hereinafter referred to as CD) as a recording medium. A disc discrimination apparatus for discriminating the LD and the CD is used when the medium is used as an LD or a CD.

Conventionally, as shown in FIGS. 1 to 2, the first detection sensor 2 is installed on one side of the clamp chassis 1 to which the upper clamping means is attached. It is a structure that can detect the disk (3) seated inside the device.

Therefore, when the disk is mounted in the apparatus while the disk 3 is mounted on the tray, the first detection sensor 2 installed in the clamp chassis 1 detects the disk 3, wherein the disk 3 is LD. In this case, since the disk 3 is detected by the first sensor 2, the microcomputer 4 determines that the disk is LD. On the contrary, when the disk 3 is a CD, the disk 3 is detected by the first sensor 2. The disc 3 is not detected by the microcomputer 4 as the CD.

The first detection sensor 2 detects the LD and does not detect the CD due to the position of the first detection sensor 2 installed in the clamp chassis 1, and the installation position of the first detection sensor is inside the device. This should be a point outside the maximum diameter (12cm) of the CD seated and inside the minimum diameter (20cm) of the LD.

As described above, the first detection sensor 2 detects the disk 3 so that the microcomputer 4 cannot determine the LD or detects the disk 3 so that the microcomputer 4 determines the LD or does not detect the disk 3. If the microcomputer 4 judges that it is a CD, the lower clamping means lifts the disk 3 slightly from the tray and the upper clamping means attached to the clamp chassis 1 moves the disk 3 together with the lower clamping means. Clamp it.

Here, the structure of the lower clamping means is a turntable 6 which is rotatable under the driving force of the servomotor 5, and a CD clamp 8 that is elastically installed with a spring 7 inside the turntable to support the CD. ) And an LD clamp 10 fixed to the turntable 6 by a screw 9 to support the LD, and the upper end of the CD clamp 8 is formed of the LD clamp 10. Has become higher than the top.

On the other hand, as described above, when the disk 3 is clamped by the upper and lower clamping means, the microcomputer 4 controls the servomotor driving unit 11 to drive the servomotor 5 so that the turntable 6 causes the servomotor. Rotating the clamped disk 3 under the driving force of (5), wherein the tilt sensor with the pickup is installed while the pickup (not shown) moves horizontally from the inner part of the disk 3 to the outer part. The disc is played because the information recorded in (3) is read.

The CD clamp 8 and the LD clamp 10 are provided as disc support means for the lower clamping means because the holes drilled on the center of the LD and the CD are different from each other. It is understood that the LD is supported and clamped by the CD clamp 8 because the LD is supported and clamped by the LD clamp 10 and the hole of the CD is smaller than the hole of the LD.

However, such a disc discrimination apparatus conventionally performs only a basic function of discriminating only whether the disc 3 is an LD or a CD. Therefore, when the user inadvertently mounts the CD and the LD in the tray at the same time, the tray discrimination may be performed. Given that the LD is located above the CD, the first sensor 2 detects the disk, and accordingly, the microcomputer 4 determines the LD and clamps the LD and the CD simultaneously by the upper and lower clamping means. In addition, since the servomotor 5 is driven together, the LD and CD are rotated in an overlapping state, thereby causing a problem such that the disk 3 is damaged or the device is damaged.

Also, if the power supply is suddenly interrupted during LD and CD playback in normal state or if power is supplied to regenerate the LD or CD while the power supply is interrupted as necessary, the pickup is moved to the LD position by the slide motor. First, the disk 3 is detected by the tilt sensor of the pickup, and when detected, the servo motor 5 is immediately driven to regenerate the LD, and when not detected, the disk 3 is moved to the CD position and the disk 3 is again detected by the tilt sensor. When the sensor detects and detects the CD, it drives the servo motor 5 to play the CD. Therefore, there is a problem in that it takes a long time to play the disk by supplying power again when the power supply is stopped.

The present invention has been made to solve the above problems, and the structure is changed to perform the additional function of determining whether the LD and CD are overlapped in addition to the basic function of determining whether the disc to be played is LD or CD. Its purpose is to prevent the disc from being damaged or the device broken due to user's carelessness.

According to an aspect of the present invention for achieving the above object, the first detection sensor for detecting the disk is installed on one side of the clamp chassis and seated inside the device by the tray during play, and installed on the turntable constituting the lower clamping means The disc discrimination apparatus of the present invention is provided with a disc discrimination apparatus of the present invention comprising a second detecting sensor for detecting a CD clamp, and a microcomputer receiving the first detecting sensor and the second detecting sensor to determine the type of disk and the overlap of the disks. According to another aspect of the present invention for achieving the above object is to detect the type of the disc seated in the device by the tray during play, and comparing the signal detected in the CD clamp detection step of the signal detected in the disc detection step Determining a disc type and a disc overlap according to the comparison state of the comparing step; As the group is determined by the state determination step that the stacking disc is displayed indicating this step is provided by the present invention disco discrimination method of the laser disk player so as performed sequentially.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 3 to 5 of the accompanying drawings.

FIG. 3 is a main configuration diagram of a laser disc player having the disc discrimination apparatus of the present invention, and FIG. 4 is a flowchart for explaining a state of disc discrimination by the disc discrimination apparatus of the present invention, and FIG. 5 is a disc of the present invention. A circuit diagram showing a state of discriminating a disc by a discriminating device, the present invention is capable of detecting a disc 3 seated inside the apparatus by a tray to one side of a clamp chassis 1 to which an upper clamping means is attached. The first detection sensor 2 is installed, and the second detection sensor 12 is installed at the inner lower end of the turntable 6 constituting the lower clamping means to detect the CD clamp 8. If (2) detects the disc (3) and the second detection sensor 12 does not detect the CD clamp (8), the microcomputer 4 determines the disc as a CD, the first detection sensor (2) 3) can not detect When the second sensor 12 detects the CD clamp 8, the microcomputer 4 identifies the disk as a CD, the first sensor 2 detects the disk 3, and the second sensor 12 detects the disk. When the CD clamp 8 is detected, the microcomputer 4 determines that the LD and the CD are overlapped.

In addition, the display unit 13 is installed to operate by receiving the signal of the microcomputer 4, and when the microcomputer 4 determines that the LD and the CD overlap, the display unit 13 is displayed so that the user recognizes it.

Referring to the operation and effect of the present invention configured as described above is as follows.

When the disc is seated inside the machine while the disc 3 is mounted in the tray, and the play is selected, the first detection sensor 2 installed in the clamp chassis 1 detects the disc 3. In the case of LD, since the disk 3 is detected by the first sensor 2, the microcomputer 4 determines that it is LD. In contrast, when the disk 3 is a CD, the disk 3 is detected by the first sensor 2. Since the disc 3 is not detected, the microcomputer 4 determines that it is a CD.

As such, when the first detection sensor 2 detects the disk 3 and the microcomputer 4 determines that it is LD or the microcomputer 4 does not detect the disk 3 and the microcomputer 4 determines the CD, the disk 3 is lowered. The upper clamping means attached to the clamp chassis 1 clamps the disk 3 together with the lower clamping means while the clamping means is slightly lifted from the tray. When the disk 3 is LD, the lower clamping means Since the LD is supported by the LD clamp 10 constituting the clamping means, the CD clamp 8 does not move, and in the case of the CD, the CD is supported by the CD clamp 8 so that the CD clamp is elastic. It is vertically moved to the lower part like the dashed-dotted line of FIG.

On the other hand, when the disk 3 is clamped, the second detection sensor 12 installed on the inner lower side of the turntable 6 operates. In this case, when the clamped disk 3 is LD, the CD clamp 8 is not moved downward. Since the second detection sensor 12 does not detect the clamp 8 as described above, the microcomputer 4 discriminates the LD and the CD clamp 8 springs when the clamped disk 3 is a CD. 7) the second detection sensor 12 detects the CD clamp 8, and the microcomputer 4 determines the CD.

In this way, if the microcomputer 4 determines whether the disk 3 is LD or CD, the microcomputer 4 immediately controls the servomotor driving unit 11 to drive the servomotor 5, so that the turntable 6 is operated. Rotating the clamped disk 3 in response to the driving force of the servomotor 5, wherein the tilt sensor is installed in the pickup while the pickup (not shown) moves horizontally from the inner part of the disk 3 to the outer part. Reads the information recorded on the disc 3, and the disc is reproduced.

In addition, when the user unintentionally mounts the LD and CD in the tray at the same time, the first detection sensor 2 first detects the disk 3, wherein the upper and lower clamping means And the CD are clamped at the same time, so the second sensing sensor 12 detects the CD clamp 8 constituting the lower clamping means, and accordingly, the microcomputer 4 determines that the LD and the CD overlap with each other on the display unit 13. The disk overlap is displayed so the user can check it.

In summary, when the first sensor 2 detects the disk 3 and the second sensor 12 does not detect the CD clamp 8, the microcomputer 4 detects the disk 3. To play the disc normally by LD, and if the first sensor 2 does not detect the disk 3 and the second sensor 12 detects the CD clamp 8, the disk is turned on. 3) disc is recognized as a CD and the disc is normally played. When the first sensor 2 detects the disk 3 and the second sensor 12 detects the CD clamp 8, the microcomputer 4 detects the LD. Disc playback is determined by the fact that and CD are overlapped.

On the other hand, when the LD or CD is normally played and the power supply is suddenly interrupted, or when the power is supplied to replay the LD or CD while the power supply is stopped, the second detection sensor 12 operates. In this case, the CD clamp 8 is detected. If the CD clamp is not detected at this time, the disc 3 is LD, so the pickup immediately moves to the LD position to replay the LD and the CD clamp 8 is detected. Since it is a CD, the pickup immediately moves to the CD position and plays the CD again. Therefore, the time taken to play the disc by supplying power again while the power supply is interrupted is very short compared with the conventional art.

Therefore, the present invention performs the additional function of determining whether the LD and the CD are overlapped in addition to the basic function of determining whether the disc to be reproduced is the LD or the CD, so that the case where the LD and the CD are reproduced in the overlapped state does not occur. Accordingly, there is an effect that the damage of the disk and the failure of the device can be prevented in advance.

Claims (3)

Installed on one side of the clamp chassis 1, the first detection sensor (2) for detecting the disc (3) seated in the device by the tray during play, and the turntable (6) constituting the lower clamping means and play Receiving the second detection sensor 12 for detecting the CD clamp 8, the first detection sensor 2 and the second detection sensor 12, and a microcomputer for determining the type of the disk 3 and the overlap of the disks. Disc discrimination apparatus of a laser disc player, characterized by consisting of (4). 2. The disc discrimination apparatus of a laser disc player according to claim 1, wherein when the microcomputer (4) determines that the LD and CD overlap, the display unit (13) displays it on the display unit (13) so that the user can recognize it. Detecting the type of the disc 3 seated in the device by the tray during play, comparing the signal detected in the disc detection step with the signal detected in the CD clamp detection step, and a comparison state of the comparison step And discrimining the disc type and disc overlap according to the plurality of discs, and a display step of informing when the disc status is determined as disc overlap.