KR20070045639A - Method and apparatus for cleaning disk of disk record/play device - Google Patents

Abstract

The present invention relates to a disk cleaning apparatus and method which can increase the recognition rate of a disc by preventing a disc recognition error due to dust or fingerprints by removing dust or dirt on the surface of the inserted disc at the same time as the disc is inserted. The disk cleaning apparatus includes a contamination detection unit that determines a contamination state of the inserted disk; A cleaner for cleaning the disc; And a cleaner control unit for controlling the disk to be cleaned by moving the cleaner to a recording area of the disk in the disk cleaning mode.

Therefore, according to the present invention, the user can improve the durability of the disk by removing the dust or dirt adhered to the disk surface without having to clean the disk directly, and thereby keep the disk clean. The disk recognition error may be prevented, thereby increasing the recognition rate of the disk.

Disc, cleaning, cleaning, contamination, dust, fingerprint, cleaner

Description

Disc cleaning apparatus and method of a disc recording / playback device {Method and apparatus for cleaning disk of disk record / play device}

1 is a block diagram of a disc recording / reproducing apparatus to which a disc cleaning apparatus according to the present invention is applied.

2a and 2b is a detailed configuration of the pollution detection unit shown in FIG.

3 is a detailed configuration diagram of the cleaner shown in FIG. 1.

4 is a flowchart showing a disc cleaning method in the disc recording / reproducing apparatus according to the present invention.

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

100: disk 110: optical pickup unit

120: pollution detection unit 130: optical pickup drive unit

140: microcomputer 150: spindle motor

160: motor drive unit 170: cleaner

180: cleaner control unit

221 light emitting element 222 light receiving element

223: pollution status determination unit

301: cleaning pad 302: holder

The present invention relates to a disc cleaning apparatus and method for a disc recording / reproducing apparatus. In particular, the disc recognition error due to dust or fingerprints is prevented by removing dust or dirt on the surface of the inserted disc at the same time as the disc is inserted. A disk cleaning apparatus and method of a disk recording / reproducing apparatus that can be enhanced.

In general, a disc as an information recording medium is formed of a polycarbonate transparent plastic disc and is formed with a groove called a pit having digital information on one side thereof, and a pit face (reflection surface) of the disc. ), An aluminum film for reflecting the laser light is deposited, and a label printing displaying the record contents and a protective coating to prevent scratches, contamination, and oxidation of the aluminum reflective film.

The disk coated with the protective coating is affected by reading the signal when there is dust or fingerprint on the surface. Especially, when there is a fingerprint on the surface of the disk, the laser light is refracted by the oil component of the fingerprint. The problem arises that you can't read straight.

Accordingly, when a disk with dirt or fingerprint is inserted or a bad disk due to scratch is inserted, the disk is forcibly ejected after displaying a disk error on the screen. Since the disk error due to dust and dirt and the disk error due to scratches are recognized and processed in the same way, the recognition rate of the inserted disk is relatively low.

In addition, when the disk is ejected by dust, fingerprints, scratches, etc., the user must directly clean the surface of the disk using a soft cloth or a volatile cleaning agent, which is cumbersome and troublesome. There was also a problem that a case in which the car damage was applied.

In order to solve this problem, Korean Patent Registration No. 116634 (1997.06.17) discloses a method for keeping the disk surface clean by removing dust or dirt on the disk surface without the user cleaning the disk. have.

However, since the disk cleaning method is controlled to perform disk cleaning while the data playback function is being performed, the disk cleaning method has a limitation in that a disk playback operation must be accompanied for the disk cleaning control to be performed.

Disclosure of Invention The present invention has been made to solve the above problems, and an object of the present invention is to provide a disc cleaning apparatus of a disc recording / reproducing apparatus that can efficiently remove dust or dirt on the surface of a disc without the user cleaning the disc. And a method.

Another object of the present invention is to clean the contaminants such as dust or fingerprints attached to the disk at the same time as the disk is inserted, to prevent the disc recognition error due to the dirt or fingerprints such as disk recording to increase the recognition rate of the disk A disk cleaning apparatus and method for a playback apparatus are provided.

It is still another object of the present invention to rotate a cleaner for cleaning a disc to the recording area of the disc only in the disc cleaning mode, whereby a disc recording / recording capable of cleaning the disc without affecting the playback operation of the disc recording / reproducing apparatus at all. A disk cleaning apparatus and method for a playback apparatus are provided.

In order to achieve the above object, a disc cleaning apparatus of a disc recording / reproducing apparatus includes: a contamination detecting unit that determines a contamination state of an inserted disc; A cleaner for cleaning the disc; And a cleaner control unit for controlling the disk to be cleaned by moving the cleaner to a recording area of the disk in the disk cleaning mode.

In a preferred embodiment of the present invention, the contamination detection unit is mounted on the front end of the optical pickup unit and linearly moved in the radial direction of the disk, the light emitting element for irradiating a beam toward the recording area of the disk; A light receiving element for receiving a beam irradiated from the light emitting element and reflected in the recording area of the disk; And a contamination state determination unit that detects an electrical property of the beam received from the light receiving element to determine the contamination state of the disk.

In another preferred embodiment of the present invention, the cleaner is composed of an upper layer and a lower layer cleaner so that the disk can be inserted in the middle, the upper layer and the lower layer cleaner comprises a cleaning pad for removing contaminants attached to the disk; And a holder for supporting the cleaning pad.

In still another preferred embodiment of the present invention, the cleaner control unit may rotate the cleaner back to the standby area outside the disk radius after the disk cleaning.

On the other hand, the disk cleaning method of the disk recording / reproducing apparatus according to the present invention in order to achieve the above object, the step of determining the contamination state of the inserted disk; Switching to a disk cleaning mode when it is determined that the disk is dirty; Rotating the cleaner located in the standby area outside the radius of the disk in the disk cleaning mode to the recording area of the disk to bring the disk and the cleaner into close contact; And rotating the spindle motor while the disk and the cleaner are in close contact with each other to clean the disk by rotating friction of the cleaner and the disk.

In a preferred embodiment of the present invention, the step of determining the contamination state of the disc comprises the steps of: irradiating a beam to the recording area side of the disc; Receiving a beam reflected from a recording area of the disc; And determining a contamination state of the disk by detecting electrical characteristics of the received beam.

In another preferred embodiment of the present invention, the step of switching to the disk cleaning mode may include informing the user that the inserted disk is a dirty disk and receiving a disk cleaning mode selection from the user.

In another preferred embodiment of the present invention, the cleaning of the disc further comprises the step of playing a pre-stored image / audio simultaneously with the disc cleaning.

In another preferred embodiment of the present invention, the method further includes rotating the cleaner back to the standby area outside the disk radius after the cleaning of the disk.

According to another preferred embodiment of the present invention, the method further comprises the step of forcibly ejecting the disk after displaying an error message on the screen if data is not normally read from the disk after the cleaning of the disk. .

Hereinafter, a disk cleaning apparatus and a method of a disk recording / reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a disc recording / reproducing apparatus to which a disc cleaning apparatus according to the present invention is applied.

As shown in FIG. 1, the disc recording / reproducing apparatus to which the disc cleaning apparatus according to the present invention is applied includes an optical pickup unit 110 for reading data on the disc 100 and contamination of the inserted disc 100. A cleaner control signal and a spindle motor control according to a pollution detection unit 120 for determining a state, an optical pickup driver 130 for moving the optical pickup unit 110 to a desired place, and a disk cleaning signal input from a user. A microcomputer 140 for outputting a signal, a motor driver 160 for driving the spindle motor 150 for rotating the disk 100, a cleaner 170 for cleaning the disk 100, and a disk cleaning. In this mode, the cleaner 170 is moved to the recording area of the disc 100 to control the disc 100 to be cleaned.

When the disc 100 is inserted, the optical pickup unit 110 records data or reproduces the recorded information while linearly reciprocating in the radial direction of the disc under the control of the optical pickup driver 130.

The contamination detection unit 120 is for determining the contamination state of the inserted disc 100, and is mounted to the front end of the optical pickup unit 110 to facilitate the contamination detection together with the optical pickup unit 110. While linearly reciprocating in the radial direction of the disk to detect foreign matter such as dust or fingerprints attached to the surface of the disk, with reference to Figures 2a and 2b will be described in more detail the configuration and operation of the contamination detection unit 120.

2A and 2B are detailed configuration diagrams of the pollution detection unit 120 shown in FIG. 1, and as shown in FIG. 2, the pollution detection unit 120 directs a beam to a recording area (lower surface) of the disc 100. A light emitting element 221 to irradiate, a light receiving element 222 for receiving a beam irradiated from the light emitting element 221 and reflected in the recording area (lower surface) of the disc 100, and the light receiving element 222 The contamination state determination unit 223 detects the electrical characteristics of the beam received from the light and determines the contamination state of the disk 100.

The contamination state determination unit 223 stores the electrical characteristic value of the beam reflected from the clean disk in a clean state as a reference value, and the beam reflected from the inserted disk 100 passes through the light receiving element 222. When received, it detects the electrical characteristics of the received beam to determine the contamination state of the inserted disk 100 by comparing the detected electrical characteristic value and the pre-stored reference value, in the present invention, the intensity of the received beam as a voltage value By converting the voltage value as an electrical characteristic value for determining a contamination state, and outputs a contamination detection signal to the microcomputer 140 when the disk 100 is determined to be a contamination state according to the comparison result.

For example, as shown in FIG. 2A, when the beam irradiated from the light emitting element 221 and reflected from the recording area of the uncontaminated disk 100 is input to the light receiving element 222, the contamination state determination unit ( 223 converts the intensity of the received beam into a voltage value and compares the voltage value with a pre-stored reference value. The beam reflected from the recording area of the unpolluted disk 100 is transmitted to the light receiving element 222 without loss. Therefore, even when the intensity of the received beam is converted into a voltage value, the voltage value is within a predetermined range from the reference value. Accordingly, the contamination state determination unit 223 determines that the inserted disk 100 is free of dust or fingerprints. Determination is not contaminated by the result and delivers the result to the microcomputer 140.

In addition, as shown in FIG. 2 (b), the beam reflected from the recording area of the contaminated disk 100 has different reflection angles or scatters due to the dust attached to the disk 100. The amount of beam received is irregular or small as compared with the case of FIG. 2 (a), and thus the voltage value even when the intensity of the beam reflected in the recording area of the contaminated disk 100 is converted into a voltage value. Is out of a predetermined range from the reference value, and thus the contamination state determination unit 223 determines that the inserted disk 100 is contaminated and transmits the result value to the microcomputer 140.

On the other hand, in the present embodiment, in order to facilitate the disk contamination detection, the pollution detection unit 120 is mounted at the tip of the optical pickup unit 110, and the pollution detection unit 120 is provided together with the optical pickup unit 110. Although the dust and fingerprints attached to the disk 100 are detected while being linearly reciprocated in the radial direction, the present invention is not limited thereto, and the contamination detecting unit 120 is attached to the disk 100. It can be attached anywhere on the disc recording / playback device as long as it can detect dust or fingerprints.

In addition, in the present embodiment, although the electrical characteristic value of the beam reflected from the clean disk, which is not contaminated, was used as a reference value for determining the contamination status, the present invention is not limited thereto, and the disk is rotated N times while the inserted disk is rotated. It is also possible to set the average voltage value of the beam reflected in the recording area as a reference value and use the reference value for the contamination state determination.

Referring back to FIG. 1, the microcomputer 140 transmits a cleaner control signal to the cleaner control unit 180 when a disk contamination signal is input from the contamination detecting unit 120, and thus the cleaner control unit 180 transmits a motor (not shown). Drive) so that the cleaner 170 located in the standby area (area A) outside the radius of the disc is rotated to the recording area (area B) of the disc so that the disc 100 and the cleaner 170 are in close contact with each other.

When the disk 100 and the cleaner 170 are brought into close contact as described above, the microcomputer 140 rotates the spindle motor 150 by the motor driving unit 160 to prevent the cleaner 170 and the disk 100. The disk 100 is cleaned by rotational friction, and when the disk cleaning is completed, the cleaner 170 is rotated by the cleaner control unit 180 to the atmospheric area (area A) outside the disk radius.

That is, under the control of the cleaner controller 180, the cleaner 170 is normally located in the standby area (area A) outside the radius of the disc, and is rotated to the recording area (area B) of the disc only in the disc cleaning mode so that the disc ( 100), by rotating the cleaner 170 to the recording area (area B) of the disc only in the disc cleaning mode, so that the optical pickup unit 110 and the cleaner are normally read when the data is read through the optical pickup unit 110. Since interference with 170 can be avoided, the disc can be cleaned without affecting the reproduction operation of the disc recording / reproducing apparatus at all.

On the other hand, the cleaner 170 is for cleaning the disk 100, the cleaner 170 will be described in more detail with reference to FIG.

3 is a detailed configuration diagram of the cleaner 170 shown in FIG. 1, and as shown in FIG. 3, the cleaner 170 may include an upper layer cleaner 300a and a lower layer cleaner so that the disk 100 may be inserted in the center thereof. The upper and lower cleaners 300a and 300b may include a cleaning pad 301 for removing contaminants attached to the disk 100, and a holder for supporting the cleaning pad 301. 302).

Here, the cleaner 170 may be configured as a single cleaner, but the reason why the disk 100 can be inserted into the upper cleaner 300a and the lower cleaner 300b as described above is the reason for the disc cleaning mode. This is to prevent vibrations or shocks from being applied to only one side of the disc 100 by the cleaner 170, thereby destabilizing focusing and tracking for disc reproduction.

In addition, the cleaning pad 301 may use a member capable of removing contaminants adhering to the surface of the disk without damaging the recording area of the disk 100, for example, rayon, polyester, or nylon fibers. In the present invention, the ultrafine yarn is used as the cleaning pad, and the cleaning pad 301 is preferably detachably attached to the holder 302 so that it can be replaced when necessary.

Hereinafter, a disk cleaning method of a disk recording / reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a flowchart showing a disc cleaning method in the disc recording / reproducing apparatus according to the present invention.

First, when the disk is inserted, the microcomputer 140 recognizes this and drives the optical pickup driver 130. The optical pickup unit 110 controls the radial direction of the disk 100 under the control of the optical pickup driver 130. direction, the lead-in area of the inserted disc 100 is searched while reciprocating (S401).

At this time, the contamination detection unit 120 mounted at the tip of the optical pickup unit 110 is electrically connected with the optical pickup unit 110 to the beam reflected from the recording area of the disk 100 while linearly reciprocating in the radial direction of the disk. Determination of the characteristic of the disk due to dust or fingerprints by detecting the characteristic (S402). In more detail, the electrical characteristic of the beam reflected from the disk in a clean state without contamination is stored as a reference value in advance, and inserted The contamination of the disc is determined by detecting electrical characteristics of the beam reflected from the recording area of the disc 100 and comparing the detected electrical characteristic value with a previously stored reference value.

In the present invention, the intensity of the beam reflected in the recording area of the inserted disc 100 is converted into a voltage value, and the voltage value is used as an electrical characteristic value for determining a contamination state. Since the configuration of FIG. 2B has been described in detail, a detailed description thereof will be omitted.

Next, when it is determined that the disk is contaminated in the contamination state determining step (S402), it is notified to the user and it is determined whether the disk cleaning mode is selected by the user (S403).

When the disk cleaning is selected by the user, that is, when the disk cleaning mode is switched, the microcomputer 140 transmits a cleaner control signal to the cleaner control unit 180, and the cleaner control unit 180 then operates the motor (not shown). By driving, the cleaner 170 located in the standby area (area A) outside the radius of the disc is rotated to the recording area (area B) of the disc to bring the disc 100 and the cleaner 170 into close contact (S404).

Then, when the disk 100 and the cleaner 170 are in close contact as described above, the microcomputer 140 rotates the spindle motor 150 by the motor driving unit 160 so that the cleaner 170 and the disk ( The disk 100 is cleaned by the rotational friction (100) (S405). At this time, the microcomputer 140 uses a player connected to the disc recording / reproducing apparatus so that the user can know that the disk is cleaned. You can also play through.

Then, it is determined whether or not the contamination adhered to the disk through the disk cleaning, that is, whether the disk cleaning is completed (S406), the disk cleaning completion determination method, the disk 100 again through the contamination detection unit 120. It is possible to use various methods such as determining the contamination state of the system or checking whether the disk cleaning has been performed for a predetermined time.

In the present embodiment, the disk is cleaned when the user selects the disk cleaning mode as an example. However, the present invention is not limited thereto, and when the disk contamination is detected, the disk cleaning mode is automatically switched without the user's selection. It is also possible.

On the other hand, when the disk cleaning is completed by the above process, the microcomputer 140 controls the cleaner control unit 180 to contact the recording area of the disk 100 to rotate the cleaner 170 outside the disk radius of the standby area ( To the area A) (S407). In this way, in the disc cleaning mode, the cleaner 170 is rotated to the recording area B of the disc to read data through the optical pickup unit 110. Since the interference between the 110 and the cleaner 170 can be avoided, the disc can be cleaned without affecting the reproduction operation of the disc recording / reproducing apparatus at all.

Next, the microcomputer 140 reads the data from the disk 100 while linearly reciprocating the optical pickup unit 110 in the radial direction of the disk 100 (S408). When the data is normally read, the read data is read. Digital signals are processed and reproduced through demodulation, decoding, and error correction (S409 to S410).

On the other hand, if the data is not normally read in the disc data reading step (S408), for example, an error message "Disk error. Please check the disk before use" is displayed on the screen, and the disk is ejected forcibly. (S411-S412).

As described above, according to the present invention, since the user can always keep the disk surface clean without directly cleaning the disk, it is possible to prevent the disc recognition error caused by dust or dirt on the disk surface. Recognition rate can be increased, and the disc contamination status is judged at the same time as the disc is inserted, and only when the disc is contaminated, the cleaner is rotated to the disc recording area to clean the disc, which does not affect the reproducing operation of the disc recording / reproducing apparatus It can also effectively remove dirt and fingerprints on the surface of the disc.

On the other hand, the present invention has been described with reference to one embodiment shown in the drawings but this is only exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. will be. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, according to the present invention, there is an effect of improving the durability of the disk by removing dust or dirt on the surface of the disk without the user cleaning the disk.

In addition, according to the present invention, by detecting the disk contamination at the same time as the disk is inserted, the disk is cleaned, it is possible to prevent the disk recognition error due to contaminants such as dust or fingerprints to increase the recognition rate of the disk. .

In addition, according to the present invention, since the cleaner for cleaning the disc is located in the recording area of the disc only in the disc cleaning mode, the effect of cleaning the disc without affecting the playback operation of the disc recording / reproducing apparatus at all is also provided. have.

Claims (11)

A pollution detecting unit for determining a contamination state of the inserted disk; A cleaner for cleaning the disc; And And a cleaner control unit for controlling the disk to be cleaned by moving the cleaner to the recording area of the disk in the disk cleaning mode. The disk cleaning apparatus of claim 1, wherein the contamination detection unit is mounted at the front end of the optical pickup unit to linearly move in the radial direction of the disk. The contamination detection unit of claim 1 or 2, A light emitting element for irradiating a beam to the recording area side of the disk; A light receiving element for receiving a beam irradiated from the light emitting element and reflected in the recording area of the disk; And And a contamination state determination unit that detects the contamination state of the disc by detecting electrical characteristics of the beam received from the light receiving element. The method of claim 1, wherein the cleaner, It consists of a top and bottom cleaner to insert the disc in the middle, The upper and lower cleaners comprise a cleaning pad for removing contaminants adhering to the disk, and a holder for supporting the cleaning pad. The disk cleaning apparatus of claim 1, wherein the cleaner control unit rotates the cleaner to a standby area outside the disk radius after the disk cleaning. Determining a contamination state of the inserted disc; Switching to a disk cleaning mode when it is determined that the disk is dirty; Rotating the cleaner located in the standby area outside the radius of the disk in the disk cleaning mode to the recording area of the disk to bring the disk and the cleaner into close contact; And And rotating the spindle motor while the disk and the cleaner are in close contact with each other to clean the disk by rotating friction of the cleaner and the disk. The method of claim 6, wherein the determining of the contamination state of the disc comprises: Irradiating a beam toward the recording area side of the disc; Receiving a beam reflected from a recording area of the disc; And And determining a contamination state of the disk by detecting electrical characteristics of the received beam. The method of claim 6, wherein the switching to the disk cleaning mode comprises: A method of cleaning a disc of a disc recording / reproducing apparatus, comprising: informing a user that the inserted disc is a dirty disc, and receiving a disc cleaning mode selection from the user. 7. The disk cleaning method of claim 6, further comprising the step of playing the pre-stored video / audio simultaneously with the disk cleaning in the step of cleaning the disk. 7. The disk cleaning method of claim 6, further comprising rotating the cleaner back to a standby area outside the disk radius after the disk cleaning step. 7. The disc recording / reproducing method according to claim 6, further comprising displaying an error message on the screen and then forcibly ejecting the disc if data is not normally read from the disc after the disc cleaning step. How to clean your device's disk.

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