JPH082848Y2 - Disc player - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" The present invention supports a laser disk (hereinafter referred to as LD) and a compact disk video (hereinafter referred to as CDV) on a turntable, and converts music and images into digital signals. The present invention relates to a disc player for reading and reproducing the information of the LD and CDV by a pickup.

"Prior art" Conventionally, LD and CDV were reproduced by using both a pickup and a compensation circuit for time-axis correction (TBC) of the pickup output.

"Problems to be solved by the device" However, since the LD is made of acrylic resin and the CDV is made of polycarbonate resin, LDs made of different materials
, And CDV have different resonance points. A thin (12 cm) thin (about half) CDV easily resonates, and it is necessary to increase the time base correction (TBC) gain to prevent resonance, while There is a functional problem such as a problem that LD easily oscillates by increasing the axis correction gain.

"Means for Solving Problems" Therefore, the present invention provides a delay means for correcting the time axis of a pickup output for reading information of a compact disc video or a laser disc, and a delay time of the delay means for the compact disc video and the laser. Equipped with a compensating circuit for CDV and a compensating circuit for LD that changes to a value suitable for the disc, and switching means that distinguishes the compact disc video or laser disc and uses the compensating circuit for CDV or the compensating circuit for LD. It is characterized by being provided.

[Operation] Therefore, the time axis correction of the pickup output can be properly performed by properly using the CDV compensating circuit and the LD compensating circuit, and the video reproducing function can be easily improved.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a control circuit diagram of a main part, FIG. 2 is a plan view of the whole, and FIG.
The figure is a side sectional view of the same. The main chassis (2) is fixed inside the box-shaped case (1) which is a disc player cabinet, and the main chassis (2) is also fixed.
A motor mounting chassis (3) is arranged in the central portion, a turntable motor (5) is fixed to the lower surface side of the mounting chassis (3), and an output shaft (6) of the motor (5) is mounted on the mounting chassis (3). A turntable (7) is provided at the upper end so as to project to the upper surface side.

Further, a pickup mounting chassis (9) for mounting the laser pickup (8) is provided, the motor mounting chassis (3) and the pickup mounting chassis (9) are connected so as to be able to move up and down, and a chuck is provided almost directly above the turntable (7). The plate (10) is arranged, and the tray (11) is provided between the turntable (7) and the chuck plate (10) to move in and out, and the turntable (7) is provided from the disc outlet (13) of the front panel (12). When the tray (11) is inserted between the chuck plate (10) and the chuck plate (10), the turntable (7) and the pickup (8) are moved upward.

In addition, LD is a laser disk with a diameter of 30 cm and 20 cm.
(14) (15) and the disc mounting surface (1) on which the CDV (16), which is a compact disc video with a diameter of 12 cm, is placed.
7) (18) (19) is formed on the tray (11), and LD (14) (15) or CDV (1) mounted on the tray (11)
6) is supported on the turntable (7), and LD (14) (1
5) or CDV (16) information is read and reproduced by the pickup (8).

Further, as shown in FIG. 1, a pickup (8) is output-connected via a delay element (23) to an output circuit (22) in which a video reproducing cathode ray tube (20), an audio reproducing speaker (21) and the like are arranged. LD (14) (15) or CDV (1
Pickup due to uneven rotation and eccentricity of 6) (8)
The time axis correction (TBC) of the read output (RF signal) of (1) is performed by the delay element (23).

Further, a horizontal synchronizing signal extracting circuit (24) for detecting the first signal for horizontal scanning with the horizontal synchronizing signal output from the delay element (23), and a horizontal synchronizing signal and reference signal output circuit from the extracting circuit (24) A phase difference detection circuit (26) that compares a reference signal from (25) to calculate a phase difference, and a CDV compensation circuit (27) and an LD that changes the delay time of the delay element (23).
The phase difference detection circuit (26) is provided with a compensation circuit (28) and a switch element (29) (30) for selectively connecting the phase difference detection circuit (26) to each compensation circuit (27) (28). ) Control the delay element (23) based on the output of CDV compensation circuit (27) or L
The D compensation circuit (28) is used for compensation.

Further, the compensation switching circuit (31) which is a switching means for turning on and off the switching elements (29) (30) is constituted by a microcomputer, and the types of the disks (14) (15) (16) are read from the lead-in track. The CDV detection circuit (3) is provided with a CVD detection circuit (32) for judging the LD (14) (15) or CDV (16) by the output of the pickup (8).
2) is connected to the compensation switching circuit (31) and CDV (16) or
CDV compensation circuit (27) or LD by discriminating LD (14) (15)
The compensation circuit (28) is configured to be used automatically.

This embodiment is configured as described above, and when the LDs (14) and (15) mounted on the tray (11) are supported by the turntable (7), the LDs (14) and (15) by the pickup (8) are The reading is detected, the LD compensation circuit (28) is connected to the phase difference detection circuit (26) through the switch element (30), and the CDV (16) mounted on the tray (11) is placed on the turntable (7). CD when picked up by support (8)
The reading of V (16) is detected by the CDV detection circuit (32), and the switching element (29) is passed through the compensation switching circuit (31).
(30) is switched, and the CDV compensation circuit (27) is connected to the phase difference detection circuit (26) via the switch element (29).

And LD compensation circuit (28) or CDV compensation circuit (27)
The output of the phase difference detection circuit (26) is corrected by the LD (14)
LD (14) (15) The time axis correction of the pickup signal (8) read signal (RF signal) is performed by the delay element (23) with the time axis correction gain suitable for (15) or CDV (16).
And the characteristics (advantages) of the CDV (16) are promoted, and each defect is replenished for reproduction.

"Effects of the Invention" As is apparent from the above embodiments, the present invention is a compact disk video (16) or a laser disk (14) (1).
5) The delay means (23) for correcting the time axis of the output of the pickup (8) for reading the information of 5) and the delay time of the delay means (23) for the compact disc video (16) and the laser disc (14) (15). Compensation circuit for CDV (2
7) and LD compensation circuit (28), and compact disc video (16) or laser disc (14)
A switching means (31) is provided for discriminating (15) and selectively using the compensating circuit (27) for CDV or the compensating circuit (28) for LD. The CDV compensating circuit (27) and the LD compensating circuit (28) are provided. It is possible to properly correct the time axis of the output of the pickup (8) by properly using, and to easily improve the image reproducing function.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of an essential part showing an embodiment of the present invention, FIG. 2 is an overall plan view, and FIG. 3 is a side sectional view of the same. (8) …… Pickup (14) (15) …… LD (laser disc) (16) …… CDV (Compact disc video) (27) …… CDV compensation circuit (28) …… LD compensation circuit (31)… ... Compensation switching circuit (switching means)

Claims (1)

[Scope of utility model registration request] 1. A delay means (23) for correcting a time axis of an output of a pickup (8) for reading information of a compact disk video (16) or a laser disk (14) (15), and a delay of the delay means (23). The CDV compensating circuit (27) and the LD compensating circuit (28) for changing the time to a value suitable for the compact disc video (16) and the laser discs (14) (15) are provided, and the compact disc video ( A disc player provided with a switching means (31) that discriminates between the CDV compensation circuit (27) and the LD compensation circuit (28) by discriminating between the laser disc (14) and the laser disc (14) (15).