KR100840576B1 - Apparatus and method for driving tray of opticaldisc player - Google Patents

Abstract

The present invention relates to a tray driving apparatus and method for an optical disk player, and the disclosed tray driving method includes applying a loading signal to a tray motor to close the tray when a tray cloth command is input, and a tray in signal indicating a state of the tray. And detecting whether the tray is chucked through, and when the chucking of the tray is detected for the first time, applying a pulse heat loading signal to the tray motor to maintain the close state of the tray, and after the chucking of the tray is first detected. By generating a pulse heat loading signal to drive the tray motor, there is an advantage in that the reproduction stability of the optical disc is improved by preventing chucking failure even when a characteristic change of the tray main body or the drive unit occurs.

Tray, Bad Chucking, Tray Motor, Clamping

Description

Tray drive device and method of an optical disc player {APPARATUS AND METHOD FOR DRIVING TRAY OF OPTICALDISC PLAYER}

1 is an exploded perspective view partially showing a general structure of an optical disc player;

FIG. 2 is a schematic partial side view of a portion of the disc player shown in FIG. 1;

3a to 3c is a cross-sectional view showing a coupling state of the cam gear and the guide boss shown in FIG.

4a and 4b is a signal waveform diagram according to the coupling state of the cam gear and the guide boss,

5 is a configuration diagram of a tray driving apparatus according to an embodiment of the present invention;

6 is a flowchart illustrating a tray driving method according to an embodiment of the present invention;

7 is a signal waveform diagram according to a tray driving method according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: tray body 120: tray drive device

130: cam gear 132: slit hole

200: drive unit 224: guide boss

300: optical pickup device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray drive of an optical disc player, and a tray driving apparatus of an optical disc player for preventing a disc recognition error from occurring due to chucking (or clamping) of the tray due to a change in the characteristics of the tray main body or the drive unit. And to a method.

FIG. 1 is an exploded perspective view partially showing the general structure of an optical disc player, and FIG. 2 is a schematic partial side view of a portion of the disc player shown in FIG.

The disc player of the optical disc player is lifted up and down by the tray main body 100 in which a tray (not shown) enters and exits the tray main body 100 for chucking a disc placed in the tray and reproducing a record for seating and moving the disc to the chucking position. The drive unit 200 is provided. The drive unit 200 is equipped with an optical pickup device 300 for reproducing the recording of the disc.

Here, the tray main body 100 is a main base (110) serving as the entire frame of the disc player, and the tray is installed in the main base 110 to transfer the tray (not shown) in and out of the disc player It is provided with a cam gear (Cam-gear) 130 is driven by the drive device 120, the tray drive device 120 to lift the drive unit 200.

In addition, the main base 110 has an insertion hole 112 into which the drive unit 200 is inserted, and an inner side of the insertion hole 112 has a hinge coupling groove 114 in which the drive unit 200 is hinged. Is formed.

The drive unit 200 includes a drive plate 210 on which the optical pickup device 300 is mounted, and a holder plate 220 installed on the front side of the drive plate 210.

And both sides of the holder plate 220 is provided with a hinge coupling boss 222 hinged to the tray body 100, the front side of the holder plate 220 is inserted into the cam gear 130, the guide boss ( 224 is provided, whereby the drive unit 200 can move up and down by using the hinge coupling boss 222 as a rotation shaft.

The drive unit 200 is inserted into the insertion hole 112 of the tray body 100 is hinged by the hinge coupling boss 222. The optical pickup device 300 is installed above the drive plate 210. In addition, the guide boss 224 protruding from the holder plate 220 installed on the front side of the drive plate 210 is inserted into the slot hole 132 of the cam gear 130 installed in the tray main body 100. . The cam gear 130 is driven and rotated by the disk tray driving device 120. Accordingly, the drive unit 200 is driven by the guide boss 224 inserted into the slot hole 132 of the cam gear 130. The lifting and lowering rotation is performed by using the hinge coupling boss 222 as the rotation shaft.

3A to 3C are cross-sectional views illustrating a coupling state of the cam gear 130 and the guide boss 224. FIG. 3A illustrates a normal coupling state, and FIGS. 3B and 3C show an abnormal coupling state.

When the guide boss 224 is placed in the same position as in FIG. 3a when the guide boss 224 is inserted into the slot hole 132 of the cam gear 130 and lifts and rotates with the hinge coupling boss 222 as the pivot shaft, the tray of the tray It is detected that chucking (or clamping) has been performed, and then a disc recognition procedure and a playback procedure are performed.

However, due to the characteristic change of the tray main body 100 or the drive unit 200, in particular, the characteristic change of the cam gear 130 or the guide boss 224, the guide boss 224 is shown in FIG. And it may be elastically restored as shown in Figure 3c and placed in a position out of the normal position.

This will be described through the signal waveform generated from the optical disc player.

4A and 4B are signal waveform diagrams illustrating a coupling state of a cam gear and a guide boss.

First, referring to FIG. 4A, which is a signal waveform appearing in the case of FIG. 3A, the tray signal TR-IN indicating the chucking state of the tray is displayed as the high state from the initial open state to the closing state. The tray is driven by closing the loading signal LOADING high during the closing state. Thereafter, when the guide boss 224 is positioned at the position of FIG. 3A and the chucking of the tray is detected, the tray signal TR-IN is changed to a low state, and thus the loading signal LOADING is also changed to a low state.

Referring to FIG. 4B, which is a signal waveform appearing in the case of FIG. 3C, when the guide boss 224 is placed in the position of FIG. 3A and elastically restored to the position of FIG. 3C after the chucking of the tray is first detected, the tray signal TR-IN ) Is alternately changed into a low state and a high state, and the loading signal LOADING is also alternately changed into a low state and a high state.

As such, when the chucking failure of the tray occurs, there is a problem in that the optical disc player has a disc recognition error and the optical disc cannot be reproduced.

In order to solve this problem, it may be considered to make mechanical modifications or to change the material of the tray body or the drive unit to a material whose characteristics are not changed by the external environment. There is a disadvantage in that the cost is increased.

The present invention is proposed to solve the problems of the prior art as described above, even after the tray chucking is detected for the first time to generate a pulse train loading signal to drive the tray motor to change the characteristics of the tray body or drive unit The purpose is to improve the playback stability of the optical disc by preventing the chucking failure.

According to an aspect of the present invention, there is provided a method of driving a tray of an optical disc player, the method comprising: driving a tray by applying a loading signal to a tray motor when a tray cloth command is input, and tray indicative of a state of the tray. Detecting whether the tray is chucked through a signal, and applying a pulse train loading signal to the tray motor when the chucking of the tray is detected for the first time, thereby maintaining a close state of the tray.

According to another aspect of the present invention, there is provided a tray driving apparatus of an optical disc player, the tray driving unit configured to drive a tray motor to close the tray to perform chucking, and to generate a tray in signal indicating a tray state, and to close the tray. A control unit that outputs a cloth control signal when the tray is open based on the tray in signal, and outputs a pulse train cloth control signal after the tray chucking is first detected through the tray in signal; In accordance with the present invention includes a motor driving unit for applying a loading signal to the tray motor or a pulse heat loading signal to the tray motor according to the pulse heat cloth control signal to drive the tray motor to close the tray.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

5 is a configuration diagram of a tray driving apparatus according to an embodiment of the present invention.

The tray driver 430 drives the tray motor 431 to open or close the tray to dechuck or chuck the tray.

The controller 410 applies a cloth control signal to the motor driver 420 based on a tray in signal provided by the tray driver 430 when the tray is opened or closed. In addition, after the tray chucking is first detected through the tray in signal, a pulse heat cloth control signal is generated and applied to the motor driver 420.

The motor driver 420 generates a loading signal or a pulse train loading signal according to the cloth control signal or the pulse train cloth control signal of the controller 410 and applies it to the tray motor 431.

The tray motor 431 is driven by a loading signal or a pulse train loading signal by the motor driver 420 to open or close the tray.

A process of driving the tray by the tray driving apparatus of the optical disc player according to the embodiment configured as described above will be described in detail below with reference to FIGS. 5 to 7.

First, when a user inputs a tray cloth command through a remote controller or an operation panel (S502), the controller 410 determines whether the tray is currently open (S504).

If the tray is in the open state, the controller 410 generates a cloth control signal and provides it to the motor driver 420 (S506). Looking at the cloth control signal through the signal waveform diagram of FIG. 7, it means a high signal generated until t1 time.

Then, the motor driver 420 generates a loading signal according to the cloth control signal of the controller 410 and applies it to the tray motor 421 (S506). Looking at the loading signal through the signal waveform diagram of FIG. 7, it means a high signal generated until t1 time.

The tray motor 431 is driven by the loading signal of the motor driver 420 to close the tray. At this time, the guide boss 224 shown in Figs. 2 and 3a is lifted and rotated by the hinge coupling boss 222 as the pivot shaft while being inserted into the slot hole 132 of the cam gear 130 to the position as shown in Fig. 3a. When placed, it is sensed that the tray is chucked (or clamped), and the train in signal generated by the tray driver 430 is changed from the initial high signal to the low signal from the time t1 as shown in the signal waveform diagram of FIG. 7. (S508).

Next, after the tray chucking is first detected through the tray in signal, the controller 410 generates a pulse train cloth control signal and applies it to the motor driver 420 (S510). As shown in the signal waveform diagram of FIG. 7, the pulse train cloth control signal means that a pulse signal having a predetermined period is in a row and lasts for a predetermined time. From t2 to t3, the low state of the pulse train cloth control signal is shown.

The motor driver 420 generates a pulse heat loading signal according to the pulse heat cloth control signal of the controller 410 and applies it to the tray motor 431 (S510). As shown in the signal waveform diagram of FIG. 7, a pulse train loading signal also means that a pulse signal having a predetermined period, such as a pulse train cloth control signal, is trained and continues for a predetermined time.

The tray motor 431 is driven by the pulse heat loading signal of the motor driver 420, and closes the tray. At this time, the guide boss 224 shown in Figs. 2 and 3a is lifted and rotated by the hinge coupling boss 222 as the pivot shaft while being inserted into the slot hole 132 of the cam gear 130 to the position as shown in Fig. 3a. It is in a laid state and maintains its normal position by pulse train driving even if a force to slide or move in the open direction by elastic recovery is applied.

If such pulse train driving is maintained until time t4 as shown in the signal waveform diagram of FIG. 7, the optical disc player may proceed to the next procedure such as playback after recognizing the disc (S512).

Meanwhile, t4 in the signal waveform diagram of FIG. 7 indicates that the tray closing is completed, and that the pulse train close control signal and the pulse train loading signal continue to this point. Of course, the end point of the pulse train loading signal may be maintained until the disc recognition is completed by the optical disc player.

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be construed as naturally included in the technical spirit described in the claims of the present invention.

As described above, the present invention generates a pulse heat loading signal after the tray chucking is detected for the first time to drive the tray motor so that the chucking failure does not occur even if a characteristic change of the tray main body or the drive unit occurs. There is an effect to improve this.

Claims (6)

When the tray cloth command is input, applying a loading signal to the tray motor to close the tray drive; Detecting whether the tray is chucked through a tray in signal indicating a state of the tray; Maintaining a close state of the tray by applying a pulse heat loading signal to the tray motor when the chucking of the tray is first detected; Tray drive method of the optical disk player comprising a. The method of claim 1, The pulse train loading signal is continued until the closing of the tray. Tray drive method of optical disc player. The method of claim 1, The pulse train loading signal continues until recognition of the disc loaded in the tray is completed. Tray drive method of optical disc player. A tray driver for driving the tray motor to close the tray to chuck the tray, and generating a tray in signal indicating a state of the tray; A cloth control signal is output based on the tray in signal when the tray is driven, and a cloth control signal is output. After the chucking of the tray is first detected through the tray in signal, a pulse heat cloth control signal is output. A control unit for outputting the A motor driver for close driving the tray by applying a loading signal to the tray motor according to the cloth control signal or by applying a pulse heat loading signal to the tray motor according to the pulse heat cloth control signal. Tray drive device of the optical disk player comprising a. The method of claim 4, wherein The pulse train loading signal is continued until the closing of the tray. Tray drive unit of optical disc player. The method of claim 4, wherein The pulse train loading signal continues until recognition of the disc loaded in the tray is completed. Tray drive unit of optical disc player.

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