KR980011376A - Measures for power failure in optical disk player - Google Patents

Abstract

The present invention relates to a method for preventing power failure in an optical disk player, the method comprising: (a) determining whether power is off due to a power failure; (b) determining whether a disk tray is opened when power is off; (C) closing the disc tray when the disc tray is opened; and (d) if the disc tray is not opened, the current mode immediately before the power failure, the position of the pickup on the disc and the table of contents And (e) when the power source is turned on again, executing the stored and stored mode at the memory-stored position in step (d).

Therefore, the present invention has an effect of stabilizing the operation of the optical disk player even when a power failure occurs while executing a predetermined function.

Description

Measures for power failure in optical disk player

FIG. 1 is a schematic block diagram of an optical disc player for carrying out the present invention. FIG.

2 is a flow chart of a method of a power failure prevention action in an optical disk player according to a preferred embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

5: power supply unit 10: pickup and actuator unit

20: RF signal amplification and servo signal processing unit 30:

35: loading unit 40: key input unit

45: Rechargeable battery 50: Microcomputer

60: digital signal processor 70: MPEG decoder

80: audio signal processor 90: video signal processor

100: Speaker 110: Screen

The present invention relates to an optical disk player, and more particularly, to an optical disk player capable of stabilizing the operation of an optical disk player by taking measures in response to occurrence of a power failure during use of the optical disk player will be.

As audio and video media evolve, recently developed optical disc players include compact disc players (CDPs), laser disc players (LDPs) and compact disc graphic players (CDGPs) ), A video compact disc player (VCDP: video compact disc player) and the like have been developed and used. In general, a compact disc player is a device capable of reproducing only audio, and a laser disc player, a compact disc graphic player, And voice simultaneously.

In recent years, a digital video disk (DVD) using MPEG-2 moving picture compression technology has been developed. This is because a gigabyte (GB) capacity including a moving picture is stored in a 12- Data can be recorded and reproduced. In addition, there is a trend to continue to improve the performance.

On the other hand, such optical disc players reproduce video and / or audio recorded on an optical disc and output the reproduced video and / or audio through a screen and / or a speaker to be viewed by a user. As compared with conventional video and / The signal can be reproduced with better picture quality and / or sound quality, little noise due to irregular reproduction and modulation is generated, distortion is very little, there is no ghost, and random access is possible And the like, and it is in a trend of rapid development and widespread use.

On the other hand, a power failure may occur during use of such an optical disk player. In such a case, the conventional optical disk player can not take measures.

In other words, for example, if a power failure occurs while the disc tray is opened, the tray may be left open, so that the disc tray may be damaged due to the user's carelessness. In addition, If a power failure occurs, there is a problem that the disk content information that has been read and stored, that is, the table of contents (TOC) data, is lost and inconvenient to perform the function before the power failure after the power is turned on again.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an optical disc player capable of taking appropriate measures when a power failure occurs while using an optical disc player, .

According to a preferred embodiment of the present invention, there is provided a method of preventing a power failure in an optical disk player for preventing a power failure during use of an optical disk player, the method comprising: (a) (B) determining whether the disc tray is opened when power is off due to a power failure in the step (a); (c) if the disc tray is opened in step (b) Closing the tray; and (d) if the disc tray is not opened in the step (b), the current mode immediately before the power failure, the position of the pickup on the disc, and the table of content data are stored and stored And (e) when the power source is turned on again, executing the mode stored in the step (d) .

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

1 is a schematic block diagram of an optical disc player for carrying out the present invention.

1, an optical disk player for carrying out the present invention includes a loading unit 35 including a power source 5, a pickup and an actuator, a key input unit 40, a rechargeable battery 45, A digital signal processing 60, an MPEG decoder 70, an audio signal processing unit 80, a video signal processing unit 90, a speaker 100, and a screen 110. The optical disk player for carrying out the present invention is provided with a rechargeable battery 45 as shown in the figure. May be different from a general optical disc player.

The power supply unit 5 supplies power to each of the constituent members of the above-mentioned optical disk player to allow the optical disk player to perform a predetermined function.

The pickup and actuator unit 10 executes the optical pickup from the loading unit 35, i.e., the disc loaded in the disc tray, and outputs an RT signal read out therefrom.

The motor driving unit 30 drives a spindle motor (not shown) to rotate the disc and actuate the actuator unit 10 so that the pickup unit 10 executes the optical pickup to read the data recorded on the disc, Signal.

The RF signal amplification and servo signal processing section 20 amplifies the RF signal provided from the pickup and actuator section 10 and also provides a servo control signal according to the signal to the motor driving section so as to perform focus servo and tracking servo.

The digital signal processing unit 60 performs RF signal amplification and digital signal processing on the amplified RF signal provided from the servo signal processing unit 20, performs error detection and error correction, and outputs the resultant signal to the MPEG decoder 70. [ (70) decapsulates the error corrected digital video signal and the audio signal provided from the digital signal processing unit (60) according to the MPEG compression format, and outputs the decoded video signal to the video signal processing unit (90) and the audio signal processing unit .

The audio signal processing unit 80 and the video signal processing unit 90 process the decoded audio and video signals provided from the MPEG decoder 70 and output them to the speaker 100 and the screen 110 respectively, And the screen 110 are respectively outputted as a voice and displayed as an image.

On the other hand, according to the present invention, when a power outage occurs, that is, when no power is supplied from the power source unit 5, the microcomputer 50 detects the charge, A control signal is generated by the battery 45 so that the power of the rechargeable battery is supplied to the microcomputer 50, the motor driving unit 30, the loading unit 35, and the like. Thereafter, the microcomputer 50 detects the state of the loading unit 35, that is, the disc tray. At this time, if the disc tray is opened, the microcomputer 50 generates a control signal to the motor driving unit 30, And drives the tray motor (not shown) to close the disc tray. If the disc tray is in the closed state, the microcomputer 50 refers to the Q data indicating the position of the current pickup 10 provided by the digital signal processing unit 60 immediately before the power failure, And stores the time information in the internal memory (not shown) together with the TOC data.

When the power is supplied from the power source 5, the microcomputer 50 refers to the TOC data according to the current mode stored in the memory and time information on the current position, And at the same time, a control signal is generated by the rechargeable battery 45 so that the rechargeable battery 45 can be recharged by the power supplied from the power supply 5 .

FIG. 2 is a flowchart of a method of preventing an optical disc player from a power failure according to a preferred embodiment of the present invention. In step S10, the microcomputer 50 determines whether power is off by a power failure. That is, the microcomputer 50 determines whether or not power is supplied from the power source unit 5. If power is not supplied from the power source unit 5 in step S10, that is, if a power failure occurs, the process proceeds to step S20.

Then, in step S20, the microcomputer 50 causes the power source of the rechargeable battery 45 to be supplied to the motor driving unit 30, the loading unit 35, and the like, and then determines whether the disc tray is opened. If the disc tray is opened in step S20, the flow advances to step S30 to close the disc tray, and the flow ends. If the disc tray is not opened, the flow advances to step S40.

If the process goes from step S20 to step S40, the position of the point of the power failure during the execution of the current mode and the current position at the time of the power failure, i.e., searching and reproduction, Stores and stores the TOC data as information.

Then, when the step S40 is completed, the standby state is maintained in the step S50.

Thereafter, in step S60, it is determined whether or not the power-off state is released, that is, whether power is supplied again from the power source unit 5. If the power source unit 5 is powered on in step S60, the process proceeds to step S70 .

Then, in step S70, referring to the TOC data stored and stored in step S40, the current mode at the time of power failure is continuously executed at the current position stored in step S40, and the flow is returned.

Therefore, according to the present invention, when a power failure occurs while performing a predetermined function in the optical disc player, the disc tray is opened by detecting the disc tray state using the rechargeable battery and then closing the disc tray, The mode and the position at the time of power failure are stored and stored. When the power is supplied again, the mode is re-executed at the stored position so that the optical disk player It is possible to stabilize the operation of the apparatus.

While the present invention has been particularly shown and described with reference to certain preferred embodiments thereof, those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the invention as set forth in the following claims.

Claims (1)

A method of preventing a power failure in an optical disk player for preventing a power failure when an optical disk player is used, the method comprising: (a) determining whether power is off due to a power failure; (B) if the power is off due to a power failure in the step (a), discriminating whether the disc tray is opened; (C) closing the disc tray when the disc tray is opened in the step (b); (D) if the disc tray is not opened in the step (b), storing the current mode immediately before the power failure, the position of the pickup on the disc, and the table of contents data, and then maintaining the standby state; (E) when the power is turned on again, executing the stored mode at the position stored in the step (d). ※ Note: It is disclosed by the contents of the first application.