KR960001757B1 - Disk discriminating apparatus for multi-disk player - Google Patents

Abstract

The device includes a disc mass detecting unit which detects voltage being proportional to the mass of disk, an analog-digital converting unit which converts analog voltage, outputted from the disc mass detecting unit, to digital, a disc determining and controlling unit which operates a replay mechanism after comparing the voltage signals of the digitally-converted disc mass to a reference voltage level, and outputting replay control signals for access of disc, and a reference level memory unit which stores pre-installed reference value setting for different disc mass.

Description

Disc Discrimination Device in Multi Disc Player

1 is a view for explaining the configuration of a disc discrimination apparatus in a multi-disc player according to the present invention.

FIG. 2 is a diagram showing a disc tray of a multi-disc player for explaining the installation position of the disc weight detecting means shown in FIG.

3 is a flowchart for explaining the operation of the disc discrimination apparatus according to the present invention.

4 is a schematic cross-sectional view taken along the line A-A of FIG.

* Explanation of symbols for main parts of the drawings

10 disc detection means (weight sensor) 12 tray

20: analog-to-digital converter 30: disc determination and control unit

40: playback mechanism 50: reference level memory

The present invention relates to a disc discrimination apparatus in a multi-disc player, and more particularly, to determine the type of disc by detecting the weight of a disc mounted by installing a weight sensor as a disc weight detection means on an inner circumferential axis of the disc tray; In addition, the present invention relates to a disc type discriminant device in a multi-disc player that is automatically executed.

At present, in the case of a multi-disc player capable of reproducing a compact disc (CD) or a laser disc (LD) having different dimensions proposed as an information storage medium, the size of such a disc is determined to reproduce data suitable for the type of disc. As an example of a method of determining the type of such a disk, a method using a pickup device that reads data by irradiating a laser beam on the disk is used. That is, when loading is performed while the disk is mounted on the tray, the pick-up apparatus moves to the outer peripheral end of the compact disk to irradiate the laser light ratio to detect the reflected light, and then moves to the position of the outer peripheral end of the laser disk to irradiate the laser light ratio. If the reflected light exists, it is discriminated by the laser disk, whereas if the reflected light is not detected, the compact disc is discriminated.

However, according to the disc type determination method by detecting the disc size by using the pick-up device, the time required for the pick-up device to move to the outer circumferential position of the disc or the TOC for track access on the disc from the disc type determination point ( There is a disadvantage that the playback time of the disc is considerably delayed, for example, because the transfer time to the Table of Content area is consumed.

In addition, in the conventional multi-disc player, the playback is started by manual input after the loading of the disc is completed, so that the cumbersome input process is required for the disc reproducing operation.

Accordingly, the present invention has been made in view of the above-described prior art, and a weight sensor acting as a disc weight detection means is provided at a predetermined position on the inner circumferential side of a tray on which a multi disc can be mounted, thereby determining the type of disc based on the weight of the disc. It is an object of the present invention to provide a disc discrimination apparatus in a multi-disc player which, in addition to discrimination, automatically starts a playback operation.

In order to achieve the above object, according to the present invention, a multi-disc player provided with a tray on which a plurality of discs are mounted, and read and reproduce information from the disc mounted on the tray, wherein the disc is mounted on the tray. A disc weight detection means for detecting the weight of the disc seated on the tray as a voltage, an analog-to-digital converter for digitally converting the voltage output from the disc weight detection means, and a voltage signal of the weight of the digitally converted disc. A disc determination and control unit for determining the type of disc and outputting a reproduction control signal for accessing the disc and driving the reproduction mechanism for disc access, and a reference value for the weight of the plurality of discs In the multi-disc player configured with the reference level memory The determination of the disk apparatus.

According to the present invention, the disk weight detecting means is constituted by a weight sensor installed on the inner circumferential shaft of the tray to detect the weight of the disk.

According to the disc discrimination apparatus in the multi-disc player according to the present invention configured as described above, a disc is provided by a weight sensor provided on an inner circumferential axis of a tray for a plurality of discs, preferably a compact disc tray. The type of disc is determined by comparing the weight of the disc with a reference value calculated in advance, and playback control is performed after the type of the disc is determined.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing the configuration of a disc discrimination apparatus in a multi-disc player according to the present invention. 10 is a multi-disc provided with a tray on which a plurality of discs are mounted so as to read and reproduce information from a disc mounted on the tray. In the disc player, disc weight detection means for detecting the weight of the disc mounted on the tray and seated on the tray by voltage. 20 denotes an analog-to-digital converter for digitally converting the voltage output from the disc weight detecting means 10, and 30 denotes a disc type by comparing the voltage signal of the weight of the digitally converted disc with a reference value. A disc determination and control unit for driving a reproduction mechanism 40 for disc access by outputting a reproduction control signal for accessing the disc, and 50 denotes a reference level storage unit for storing reference values for weights of a plurality of discs.

According to the present invention, the disk weight detecting means 10 has an inner circumferential side of the tray 12, preferably compact, on a tray 12 having a structure in which a plurality of types of disks are seated as shown in FIG. It is composed of a weight sensor provided in the disc seat 14, and in more detail, the disc weight detecting means 10 is CD seat 14 as shown in the cross-sectional schematic of the AA line shown in FIG. And the height of the jaw formed between the laser disk (LD) seating portion 16, that is, the height of the CD seating surface of the CD seating portion 10 to the height of the LD seating surface of the LD seating portion 16. And a voltage generator 10b for generating a voltage according to the pressed state (on, off state) of the push-type switch 10a, and the LD seating portion 16 of the tray 12. When the LD is seated on the), the push-type switch 10a is not pressed and is in an off state. On the other hand, when the CD is seated on the CD mounting portion 14, the push-type switch (10a) is pressed by the weight of the seated CD is switched on state, at this time, the voltage generator 10b generates a voltage Since the generated voltage is applied to the analog-to-digital converter 20 side, the disc type (CD or LD) is determined according to the pressed state (on, off state) and the pressed degree of the pressed switch 10a. can do.

Next, the operation of the disc discrimination apparatus in the multi-disc player according to the present invention having the above-described configuration will be described in detail with reference to the flowchart shown in FIG.

First, the inner circumferential side of the tray 12, which is composed of a weight sensor for detecting the weight of the disk in step 110 of FIG. 3 and employed in a multi-disc player as shown in FIG. When the mounting of the disk is detected by the disk weight detecting means 10 provided at the predetermined position of the compact disk mounting portion 14 located at the step 120, the weight of the disk is detected by the disk weight detecting means 10 and the step ( In 130, the voltage signal is converted into a voltage signal corresponding to the detected weight, and then the voltage signal is converted into a digital signal by the analog-to-digital converter 20.

In step 140, the weight signal of the digitally converted disk is applied to the disc determination and control unit 30. Accordingly, the disc determination and control unit 30 is applied to the weight of each disc previously stored in the storage unit 50 in step 150. The reference value is read and the type (CD or LD) of the disc is determined by comparing the weight signal of the currently loaded disc applied from the analog-digital converter 20.

After the determination of the disc is made in this way, in step 160, the disc determination and control unit 30 outputs a reproduction signal for the disc of which type has been determined, and also drives the reproduction mechanism 40 to record on the disc. The data will be played back.

As described above, according to the disc discrimination apparatus in the multi-disc player according to the present invention, since the disc type is detected and the disc type is automatically determined, then the playback starts automatically. The disc type determination and playback operation can be performed without the need.

Claims (2)

In a multi-disc player provided with a tray 12 on which a plurality of discs are mounted, to read and reproduce information from a disc mounted on the tray 12, the tray is provided at a predetermined position on the tray 12, and the tray is provided. Disk weight detection means (10) for detecting the weight of the disk seated on (12) with a voltage; An analog-digital converter (20) for digitally converting the voltage output from the disk weight detection means (10); The type of disc is determined by comparing the voltage signal of the weight of the digitally converted disc with a reference voltage level, and a play control signal for accessing the disc is output to drive the play mechanism 40 for disc access. A disc judgment and control unit 30 to make; And a reference level storage unit (40) in which reference values for the weights of the plurality of types of disks are stored in advance, so that disc type discrimination and reproduction are automatically performed. 2. A disc discrimination apparatus according to claim 1, wherein said disc detecting means (10) is provided on a inner circumferential side of said tray (12) and comprises a weight sensor for detecting the weight of the disc.