JP4230380B2 - Lens cleaning disc - Google Patents

Description

  The present invention relates to a lens cleaning disk for cleaning a pickup lens of a disk reproducing apparatus having a multi-session.

Normally, in a disc player such as a CD player, a recorded signal is read through an optical lens facing a compact disc. If foreign matter such as airborne dust or fiber dust adheres to the surface of this optical lens, that is, a pickup lens. This causes a signal reading error and deteriorates the reproduction characteristics.
Therefore, in order to eliminate such problems and clean the pickup lens, conventionally, a lens cleaning disk having substantially the same shape as the compact disk is used, and a bunch of bristles bundled with a plurality of brush hairs is applied to the disk surface. Some are dispersed and arranged in a spiral shape (see, for example, Patent Document 1).
This lens cleaning disk has a virtual origin set a minute distance outside the lead-in area outside line, and the phase is shifted by 45 degrees counterclockwise from the virtual origin, and is shifted by a predetermined distance every time the phase is shifted. The center is set, and hair bundles are planted at each planting center.

Japanese Patent Publication No. 06-103541

However, in the case of the conventional lens cleaning disk as described above, many disk reproducing apparatuses perform focus ON control around the TOC (Table Of Contents), and therefore, depending on the disk reproducing apparatus, the implanted hair bundle The focus ON operation cannot be completed by touching the lens, and it becomes impossible to shift to the next mode.
In addition, since cleaning is performed when the TOC is moved at the start of regeneration and after TOC regeneration, it is necessary to implant hair bundles in a very narrow area on the lens cleaning disk. At the same time, it was very difficult to increase the number of hair bundles to be planted.
In addition, when a hair bundle is implanted in the program area, the error detection function of the disk reproducing device works, and a series of cleaning operations cannot be completed. There was a problem such as occurrence.
In addition, since the number of times the pickup passes over the cleaning member is small, it is difficult to obtain a sufficient lens cleaning effect.

  The present invention has been made to solve the above-described problems. The pickup lens can be efficiently and surely cleaned, and the design flexibility of the cleaning member can be expanded. In addition, malfunction or noise during the cleaning operation can be achieved. It is an object of the present invention to obtain a lens cleaning disk that can prevent the occurrence of the above and that can provide a great lens cleaning effect even when the same number of cleaning members are implanted.

In the lens cleaning disk according to the present invention, a cleaning member is disposed in the pause section of the first track in a session sandwiched between the first and last sessions among three or more sessions.

According to the present invention, the lens cleaning disk in which the cleaning member is arranged in the pause section of the first track in the session sandwiched between the first and last sessions among the three or more sessions, malfunction, noise, etc. The number of times the pickup reciprocates increases, and the number of times the pickup lens touches the cleaning member increases, so that a large lens cleaning effect can be obtained even when the same number of cleaning members are implanted.

An embodiment of the present invention will be described below.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing the structure of a lens cleaning disk according to Embodiment 1 of the present invention.
The lens cleaning disk LCD in the present embodiment is composed of two sessions. The first session has three areas: a lead-in area (LI1) 1, a program area (P1) 2, and a lead-out area (LO1) 3. Similarly, the second session is composed of three areas: a lead-in area (LI2) 4, a program area (P2) 5, and a lead-out area (LO2) 6.

In the present embodiment, a plurality of cleaning members 7a, 7b, 7c, 7d are implanted in the program area (P1) 2 of the first session of the lens cleaning disk LCD. That is, these cleaning members 7a, 7b, 7c, and 7d are provided in the data area on the outer diameter side of the lead-in area (LI1) 1, that is, the program area (P1) 2.
Next, the data structure of the lens cleaning disk LCD will be described with reference to FIG.

  FIG. 2A substantially shows a sub-coating frame format, and a group of 98 frames is called one block. Further, as shown in the frame format of FIG. 2B, data of 6 samples of the music data LR2 channel, that is, data corresponding to 24 (= 12 × 2) symbols and 32 symbols of parity 8 (4 × 2) symbols. The sub-coding 1 symbol and the frame synchronization signal 1 symbol constitute one frame (588 bits). That is, frame synchronization signal 1 symbol = 24 bits, subcoding 1 symbol = 14 bits, digital audio data and parity 32 symbols = 32 × 14 bits, and 3 bits for combining each symbol are prepared, One frame of 588 bits is configured.

  In one frame, sub-coding for 8 bits by so-called EFM modulation is allocated, and each bit is represented by P, Q, R, S, U, V, as shown in FIG. This is called a W channel, and each of these channels exists in 98 blocks in one block. And this 8-bit application is not possible with previous LP records, such as firstly giving the beginning of a song and having a program function to play according to a preset order, and secondly a display. In order to enable various ways of enjoying, 2 bits of P and Q are used for the first application, and 6 bits from R to W are used for the second application. Among these, in particular, the meaning is given as shown in FIG. 3 depending on the contents of the Q channel.

3 shows the contents of the Q channel in the sub-coding. FIG. 3A shows the data structure in the lead-in area (TOC), FIG. 3B shows the data structure of the program area, and FIG. Represents the data structure of the lead-out area.
As shown in FIG. 3A, the lead-in area when TNO (search number) is 00, as shown in FIG. 3B, the program area when TNO is 01 to 99, and as shown in FIG. When TNO is AA, it indicates a lead-out area, and more detailed meaning is indicated by the contents of other Q channels.

The Q channel data in the lead-in area shown in FIG. 3A is called TOC, and information such as the start position of the program area is recorded, and the disc playback apparatus uses the contents of these Q channels. This makes it possible to control playback such as cueing. Incidentally, POINT: 00 to 99 in FIG. 3A represents the absolute time at which each movement indicated by the number starts, that is, the absolute time at which each track starts at PMIN, PSEC, PFRAME, and POINT: A0 at PMIN. The first movement number, PSEC indicates the type of session, POINT: A1 indicates the last movement number in PMIN, POINT: A2 indicates the absolute time when the lead-out starts in PMIN, PSEC, PFRAME, and POINT: B0 is a multi-session disc, the absolute time when the program area of the next section starts in MIN, SEC, and FRAME, and the last section when MIN, SEC, and FRAME are all FF or there is no BO Represents that.
In FIG. 3B, INDEX: 0 represents a pause section, and INDEX: 00 to 99 represents an INDEX number.

  Next, the operation when the lens cleaning disk is reproduced by the disk reproducing apparatus will be described with reference to FIG. In FIG. 4, the configuration of the disc is the same as in FIG. 1, and arrows (1) to (3) indicate the playback order. 4 representatively represents one of a plurality of cleaning members 7a, 7b, 7c and 7d implanted in the program area (P1) 2 of the first session in FIG. It is shown.

  Now, when the lens cleaning disk is reproduced by the disk reproducing apparatus, the pickup lens 8 attached to the tip of the pickup (not shown) is first located at a predetermined position, for example, near the beginning of the program area (P1) 2 of the first session. The focus is turned on. Thereafter, the pickup lens 8 moves to the lead-in area (LI1) 1 as indicated by the arrow (1), and reads the TOC of the first session by the pickup.

  Thereafter, the pickup lens 8 moves to the lead-in area (LI2) 4 of the second session as indicated by the arrow (2), and reads the TOC of the second session by the pickup. In this process, the pickup lens 8 contacts the cleaning member 7 (first time). Thereafter, the pickup lens 8 further moves to the head of the program area (P1) 2 of the first session as indicated by the arrow (3), and the pickup starts reproduction from this position. In this process, the pickup lens 8 contacts the cleaning member 7 (second time). At this time, at the top of the program area (P 1) 2, a sound such as “Please remove the disc because cleaning has been completed” is recorded.

  As described above, according to the first embodiment, the lens cleaning disk in which the cleaning member is arranged in the region from the outside of the lead-in area that is the first session to the start point of the second session that is the last session. By performing a reproduction operation using the pickup lens, the pickup lens can be brought into contact with the cleaning member twice to perform lens cleaning on the pickup lens, so that the pickup lens can be efficiently and reliably cleaned and cleaned. It is possible to secure a wide area in which the cleaning member can be implanted and to expand the design freedom of the cleaning member. Further, since cleaning is performed using the TOC reading operation in the multi-session disc substantially, a versatile lens cleaning disc can be obtained which can be applied to both a CD audio player and a CD-ROM player.

Embodiment 2. FIG.
FIG. 5 is a diagram showing the configuration of a lens cleaning disk according to Embodiment 2 of the present invention.
The lens cleaning disk in the present embodiment is also composed of two sessions, and the first session is composed of three areas: a lead-in area (LI1) 1, a program area (P1) 2, and a lead-out area (LO1) 3. The second session is composed of three areas of a lead-in area (LI2) 4, a program area (P2) 5, and a lead-out area (LO2) 6, as in the first embodiment.

In the lens cleaning disk according to the present embodiment, a pause section 9 is arranged at the head of the program area (P1) 2 in the first session. This pause section 9 is a section where INDEX00 is recorded, as can be seen from FIG.
In this embodiment, the cleaning member is provided in the pause section of the first track in at least one session. That is, for example, as shown in FIG. 5, the cleaning member 7 is implanted in the pause section 9 at the head of the program area (P1) 2.

Next, the operation when the lens cleaning disk is reproduced by the disk reproducing device will be described with reference to FIG. In FIG. 5, the configuration of the disc is the same as in FIG. 1, and arrows (1) to (3) indicate the playback order.
Now, when the lens cleaning disk is reproduced by the disk reproducing apparatus, the pickup lens 8 attached to the tip of the pickup (not shown) is first placed at a predetermined position, for example, at the head of the program area (P1) 2 of the first session. Focus is turned on near the beginning of a certain pause section 9. Thereafter, the pickup lens 8 moves to the lead-in area (LI1) 1 as indicated by the arrow (1), and reads the TOC of the first session by the pickup. Thereafter, the pickup lens 8 moves to the lead-in area (LI2) 4 of the second session as indicated by the arrow (2), and reads the TOC of the second session by the pickup. In this process, the pickup lens 8 contacts the cleaning member 7 (first time).

  Thereafter, the pickup lens 8 moves to the beginning of the program area (P1) 2 of the first session as indicated by an arrow (3), and the first session and the first track pause according to the TOC information of the first session by the pickup. The program area (P1) 2 after the end of the section 9 is reproduced. In this part, that is, at the head of the program area (P1) 2, a sound such as “Please remove the disk because cleaning is completed” is recorded.

  Therefore, many disk playback devices, after starting playback, move the pickup to the playback position of the first track based on the TOC information and play it back. However, since the TOC information stores the position after the pause, If the cleaning member 7 is implanted in the pause section 9 as in the second embodiment, the pickup lens 8 does not come into contact with the cleaning member 7 during reproduction, but the cleaning is performed in the process of moving to the first track. Due to the contact with the working member 7, it is possible to prevent malfunction and noise.

  As described above, according to the second embodiment, the cleaning of the pickup lens is performed by providing the cleaning member in the pause section of the first track and bringing the pickup lens into contact with the cleaning member once in at least one session. In addition, since the cleaning member is implanted in the pause section of the first track and reproduction is performed excluding this pause section, it is possible to prevent malfunctions and noises from occurring. .

Embodiment 3 FIG.
FIG. 6 is a diagram showing a configuration of a lens cleaning disk according to Embodiment 3 of the present invention.
The lens cleaning disk in the present embodiment is composed of three sessions, and the first session is composed of three areas: a lead-in area (LI1) 1, a program area (P1) 2, and a lead-out area (LO1) 3. The second session is composed of three areas: a lead-in area (LI2) 4, a program area (P2) 5, and a lead-out area (LO2) 6. Similarly, the third session is a lead-in area (LI3) 11, and a program The area (P3) 12 and the lead-out area (LO3) 13 are composed of three areas.

  In the lens cleaning disk according to the present embodiment, the first session has a pause section 9 arranged at the beginning of the program area (P1) 2 and the second session has a pause section at the beginning of the program area (P2) 5. 10 is arranged, and in the third session, a pause section 14 is arranged at the head of the program area (P3) 12. These pause sections 9, 10, and 14 are sections in which INDEX00 is recorded as can be seen from FIG.

  In the present embodiment, the cleaning member 7 is provided in a session sandwiched between the first and last sessions among the three sessions, that is, in the second session sandwiched between the first session and the third session. That is, as shown in FIG. 6, the cleaning member 7 is implanted in the program area (P2) 5 (the pause section 10) of the second session.

Next, the operation when the lens cleaning disk is reproduced by the disk reproducing device will be described with reference to FIG. In FIG. 6, the configuration of the disk may be that of FIG. 1 in which one more session is added, and arrows (1) to (6) indicate the playback order.
Now, when the lens cleaning disk is reproduced by the disk reproducing apparatus, the pickup lens 8 attached to the tip of the pickup (not shown) is first placed at a predetermined position, for example, at the head of the program area (P1) 2 of the first session. Focus is turned on near the beginning of a certain pause section 9. Thereafter, the pickup lens 8 moves to the lead-in area (LI1) 1 as indicated by the arrow (1), and reads the TOC of the first session by the pickup.

  Thereafter, the pickup lens 8 moves to the lead-in area (LI2) 4 of the second session as indicated by an arrow (2), and reads the TOC of the second session by the pickup body. Thereafter, the pickup lens 8 moves to the lead-in area (LI3), and reads the TOC of the third session by the pickup. In this process, the pickup lens 8 contacts the cleaning member 7 (first time). Thereafter, the pickup lens 8 moves to the head of the program area (P1) 2 of the first session as indicated by an arrow (4), and the first session and the first track pause according to the TOC information of the first session by the pickup. The program area (P1) 2 after the end of the section 9 is reproduced. In this process, the pickup lens 8 contacts the cleaning member 7 (second time).

  Thereafter, the pickup lens 8 moves to the beginning of the program area (P2) 5 of the second session as indicated by an arrow (5), and the second session and the first track pause according to the TOC information of the second session by the pickup. The program area (P2) 5 after the end of the section 10 is reproduced. In this portion, a sound such as “Since cleaning has been completed, please take out the disc” is recorded. In this process, the pickup lens 8 contacts the cleaning member 7 (third time).

  As described above, according to the third embodiment, three sessions are provided and a session between the first and last sessions, that is, a lens cleaning disk provided with a cleaning member in the second session is used. By executing the reproduction operation, the pickup lens comes into contact with the cleaning member three times, and the lens cleaning at this time is executed. Therefore, the number of times the pickup reciprocates increases, and the number of times the pickup lens touches the cleaning member increases. As a result, a large lens cleaning effect can be obtained even if the same number of cleaning members are implanted. In the above description, the number of sessions is three. However, the present invention can be similarly applied to a plurality of sessions exceeding this, and the same effects can be obtained.

It is a block diagram which shows the structure of the lens cleaning disk by Embodiment 1 of this invention. It is a figure for demonstrating the data structure of the lens cleaning disc by Embodiment 1 of this invention. It is a figure which shows the content of the Q channel in the sub-coding of the lens cleaning disk by Embodiment 1 of this invention. It is a figure for demonstrating reproduction | regeneration operation | movement of the lens cleaning disc by Embodiment 1 of this invention. It is a figure which shows the structure of the lens cleaning disk by Embodiment 2 of this invention. It is a figure which shows the structure of the lens cleaning disk by Embodiment 3 of this invention.

Explanation of symbols

  1 Lead-in area (LI1), 2 Program area (P1), 3 Lead-out area (LO1), 4 Lead-in area (LI2), 5 Program area (P2), 6 Lead-out area (LO2), 7, 7a, 7b, 7c, 7d Cleaning member, 8 pickup lens, 9, 10, 14 pause section, 11 lead-in area (LI3), 12 program area (P3), 13 lead-out area (LO3).

Claims (1)

In a lens cleaning disc for a multi-session disc playback device having three or more sessions,
A lens cleaning disk comprising a cleaning member in a pause section of a first track in a session between the first and last sessions among the three or more sessions.

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