JPH0991852A - Disk display device of disk changer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately recognize the existence of a disk for every tray even without providing a sensor for detecting the existence of the disk. SOLUTION: In the initial state, red and green LEDs 8 of a display part 7 corresponding to each tray are simultaneously turned on to obtain orange color to display heat the existence of disk is uncertain. When the CD 1 is taken out from a CD changer unit 5 and placed on a spindle motor 2 and detected by an optical pickup 3, the information of the presence of disk is stored in the part of a memory 9 corresponding to the tray by a system control part 14, and the corresponding red LED is turned on to display the presence of disk. When the reproduction is impossible, the information of the absence of disk is stored in the memory 9 to turn off the LED 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc changer disc display device for displaying the presence or absence of discs in a disc changer for storing and playing a plurality of compact discs.

[0002]

2. Description of the Related Art In recent years, a disc changer for storing a plurality of discs such as compact discs (hereinafter referred to as CDs) and playing them one by one, which does not have a sensor for detecting the presence or absence of the disc for cost reduction, The disc display device that displays the presence / absence of discs stored in the trays in the device displays discs in all trays until playback is performed one by one to check whether the discs are actually stored in the trays. Or
The only option was to display all discs without a disc.

[0003]

The disk display device of such a conventional disk changer has no problem in display if the disk changer has a built-in sensor for detecting the presence / absence of a disk, but the cost of the sensor section is low. For example, in the case of a tray of the type in which a plurality of disks are placed on the plane around the axis of a disk-shaped tray, if there is a single disk presence detection sensor, the tray rotates once. However, since this format requires a large area, it is inevitable to use a format in which multiple trays are arranged vertically, for example, for in-vehicle applications where the installation area is limited. A disk detection sensor is required, the cost of the sensor is high, and if the disk detection sensor is omitted for cost reduction, There is a problem that it takes time because the presence or absence of the black can be detected without actually reading the discs one by one, and in the case of the integrated component component, the disc servo power is turned off when the CD is not played to prevent noise. There is a problem that the presence or absence of the disc cannot be detected when the position other than the disc is selected, and if the disc is not read, it is displayed with the disc present or without the disc until the disc is played. There was only one way.

That is, the above-described conventional disc display device of the disc changer has a problem that the state cannot be correctly displayed when the presence or absence of the disc in the disc changer is not actually detected. Was there.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art, and an object thereof is to provide a disc display device of a disc changer having a display section for displaying a disc state unknown until the presence or absence of the disc becomes clear. It was made as.

[0006]

In order to achieve the above object, a disk display device of a disk changer according to the present invention has, as a first configuration, disk rotation control drive means for controlling and driving a disk as a recording medium. A reproducing means for reproducing recorded data from the disc as the recording medium, a disc changer means for accommodating a plurality of discs as the recording medium and mounting the discs one by one in the disc rotation control driving means, and the disc changer means. Storage means for storing whether or not a disk as the recording medium exists at a predetermined position, and whether or not there is a disk as the recording medium corresponding to the predetermined position of the disk changer means. Unknown or at least 3
Display means for displaying one of the states, controlling the operation of each means, and storing the presence of the disk in the storage means when the disk as the recording medium is taken out from a predetermined position of the disk changer means and reproduced. When the disc cannot be taken out and played back, the storage means stores the absence of the disc, the display means displays the presence or absence of the disc on the basis of the storage state of the storage means, and the disc is present according to the storage state. ,
It is configured to include a control means for displaying the absence of a disk.

As a second configuration, in addition to the first configuration, the control means refers to the storage means by the operation of the user and refers to the storage means to move the disc from the disc position where the disc presence / absence of the disc changer means is stored. It has a configuration in which it is mounted on the rotation control drive means and only disc presence / absence determination is performed without playing, and the disc presence / absence is stored in the storage means.

Further, in the above construction, it is possible to adopt a construction in which a two-color LED is used as the display means and the disc presence / absence is displayed by simultaneously lighting the two-color LEDs.

[0009]

According to the first aspect of the present invention, the control means causes the storage means to store the presence of the disc when the disc which is the recording medium is taken out from the predetermined position of the disc changer means and reproduced. When the disc cannot be taken out and played back, the storage means stores the absence of the disc, based on the storage state of the storage means, the display means displays the disc presence / absence unknown, and there is the disc according to the storage state and the disc does not exist. Acts to display.

In the second construction, the control means refers to the storage means by the operation of the user and mounts the disc on the disc rotation control drive means from the disc position where the disc presence or absence of the disc changer means is stored. Only disc presence / absence determination is performed without playing, the disc presence / absence is stored in the storage unit, and the disc presence / absence unknown state is displayed based on the storage of the storage unit.
Alternatively, it acts to change the display to the disk-less state, and the disk presence / absence status in the disk changer can be accurately displayed.

Further, in the above-mentioned structure, the two-color LED is used as the display means, and the display of whether or not the disc is present is performed by simultaneously lighting the two-color LEDs, thereby operating the display means in a small space and simplifying the operation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk display device for a disk changer according to a first embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of a disc changer according to a first embodiment of the present invention, and FIG. 2 is an external view showing a display portion of a disc display device of the disc changer. FIG. 3 (a) is a flowchart for displaying a disc using the same two-color LED, and FIG. 3 (b).
FIG. 4 is an explanatory diagram showing correspondence between lighting of each of the two-color LEDs and a disc state.

In FIG. 1, a CD 1 is mounted on a spindle motor 2 and reproduces data recorded by an optical pickup 3. The reproduction control unit 4 includes a disk rotation control unit 10 that controls the spindle motor 2, a focus control unit 11 that controls the movement of the optical pickup 3, a signal processing unit 12 that processes the output signal of the optical pickup 3, and a changer unit 5. Changer control unit 13 for controlling
It has a memory 9 and receives an instruction from the key input unit 6 to control the entire system, and a plurality of two colors L of the display unit (display means) 7.
It has a system control unit 14 that controls the lighting of the EDs 8a to 8e.

The two-color LEDs 8a to 8e indicate the states of the disks accommodated in the respective five trays of the CD changer unit 5 as follows. It lights red when there is a disc in the tray, turns off when there is no disc, lights green when the disc is playing, and lights up red + green simultaneously when the disc is unknown. It looks orange in appearance. In this way, the four states including the time when the disk is unknown can be displayed without increasing the number of LEDs. Correspondence between lighting and disk status is shown in FIG.

In FIG. 2, the present embodiment shows an example of a changer mechanism for five disks, and five two-color LEDs 8a to 8e for displaying disk information are provided. In addition, the panel is provided with a disc tray opening / closing door 15, a stop button 16, a reproduction button 17, and a disc number selection button 18.

The operation of the disc display device of the disc changer configured as described above will be described below. First, as shown in FIG. 3A, the two-color L corresponding to the tray newly opened and closed in step 301.
In step 302, the ED is in a two-color simultaneous lighting state (apparently orange lighting), and a display indicating whether or not the disc is present is displayed. Also, for the tray whose disc has been replaced, refer to step 304.
If the presence or absence of the disc is stored in step 305 by reading the memory 9 in step 3, if there is a disc, step 3
At 06, it is turned on in red to indicate that there is a disk. When the memory does not have a disk, it is turned off at step 307 to show that there is no disk, and when not stored in the memory 9 at step 303, two colors are simultaneously turned on at step 302. As to whether or not the disc is present is displayed.

Next, at the stage where the disc on this tray is reproduced, if there is a reproduction command at step 308, if the disc can be read at step 309, LE at step 310.
D becomes green and the reproduction state is displayed to enter the reproduction state. At this time, in step 311, the presence of the disk is recorded in the memory 9. When the reproduction is completed in step 312, red is lit in step 313 and stored in the memory 9 in step 314. Thereafter, until the tray is reopened, the LED 8 is lit red to indicate that a disc is present. If the disc cannot be read in step 309, it is determined that there is no disc, and in step S315, the disc is turned off to indicate that there is no disc. In step 316, the disc 9 is stored in the memory 9, and thereafter, until this tray is reopened,
The LED 8 is turned off and the display of no disk continues. If there is a disk exchange command in step 317, step 3
In step 18, the disk is replaced, and the process returns to step 301. If there is no disk replacement command in step 317, the process directly returns to step 301.

In the present embodiment, in order to prevent the number of LEDs on the panel from increasing, a two-color LED is used for the display section 7 and a plurality of states can be displayed by one two-color LED.
If the number of LEDs may be increased, or if there is space, normal LEDs may be used.
The type of display means such as L fluorescent tube or liquid crystal does not matter. Furthermore, if it is an FL fluorescent tube or liquid crystal, it may be expressed in characters.

Next, a second embodiment of the present invention will be described. FIG. 4 is a flow chart showing the operation of the second embodiment of the present invention. In a disc reproducing apparatus provided with a disc display device, a key operation from a key input section 6 or a specific key operation is performed without playing. The operation of performing all disc presence / absence determinations and changing the display of the disc presence / absence unknown state to the presence or absence state is shown.
Even if the presence / absence of discs is sequentially stored in the memory 9 as shown in FIG. 3, trays with unknown discs still remain,
The operation when the user (user) wants to confirm whether or not there is an actual disc on the tray with the presence / absence indication is explained.

In FIG. 4, when the user operates a specific key not shown in FIG. 2 while the disk is stopped, this routine operates. If it is the tray in which the memory 9 is checked in step 401 and the presence / absence of a disc is stored, the disc 1 is taken out from the tray of the CD changer unit 5 onto the spindle motor 2 in step 402, and step 4
In 03, it is determined whether or not the focus can be pulled in to this disc, and if possible, it is determined in step 404 that there is a disc, in step 405 the disc 9 is stored in the memory 9, and in step 406 the two-color LED 8 lights up in red to indicate that there is a disc. Display and return to step 401. Step 40
If it is not possible to pull in the focus in step 3, it is determined in step 407 that there is no disk, the disk 9 is stored in the memory 9 in step 408, the two-color LED 8 is turned off to display no disk, and the process returns to step 401.

In this operation, it is possible to confirm whether or not there is a CD in one tray. Depending on the setting, all the trays with or without discs are automatically searched out from the memory 9 until there is no disc unknown memory in the memory 9, and the trays are sequentially searched. You can also check it.

As described above, in order to make it easy for the user to confirm the presence / absence of a disc by the display, a focus is given to a specific disc presence / absence unknown tray or all disc presence / absence unknown trays by an optical pickup without performing reproduction by a specific operation. By only detecting the presence or absence of the disc such as pulling in and providing the function of changing the disc presence / absence indication to the disc presence / absence display, more correct disc information can be transmitted to the user.

In the embodiment, an example of a compact disc which is a read-only optical disc is shown, but the present invention is not limited to this, and it can be used for a recordable / reproducible optical disc, a magneto-optical disc, and the like, and an optical pickup. If a magnetic head is used instead of the above, a magnetic disk may be used as the recording medium. The details and numerical values of the configurations shown in the embodiments are not limited to the examples.

[0024]

As described above, in the disc display device of the disc changer of the present invention, the disc rotation control drive means for controlling and driving the disc as the recording medium and the recorded data from the disc as the recording medium are reproduced. Reproducing means, a disc changer means for accommodating a plurality of recording medium discs and mounting the discs one by one in the disc rotation control driving means, and whether or not there is a recording medium disc at a predetermined position of the disc changer means. A storage means for storing such information, a display means for displaying at least three states of whether or not there is a disc, which is a recording medium, corresponding to a predetermined position of the disc changer means, and each means. And a control means for controlling the storage means and the display means.

In this structure, the control means controls the operation of each means, and when the disc which is the recording medium is taken out from the predetermined position of the disc changer means and is reproduced, the presence of the disc is stored in the storage means and the disc is taken out. When there is no disc in the storage means when reproduction is not possible, based on the storage state of the storage means, when there is no storage, the display means displays whether or not there is a disc, and according to the storage state, there is a disc and there is no disc. You can

As a result, when the presence or absence of a disk is unknown,
Unlike a conventional display device that displays differently from the actual state, such as with or without a disc, the presence or absence of a disc is displayed and accurate information can be transmitted to the user.

In addition to the above-mentioned structure, the operation of the control device is changed and the control means refers to the storage means by the operation of the user, and the control means refers to the storage means to rotate the disc from the disc position where the disc presence / absence of the disc changer means is stored. Only disc presence / absence is discriminated without being mounted on the control drive means, and the disc presence / absence is stored in the storage means, and the disc presence / absence state is displayed based on the storage of the storage means. Can be changed to.

Thus, when the user wants to confirm the presence / absence of a disc when the disc presence / absence indication is displayed, a correct disc information can be transmitted to the user by providing a function of discriminating the presence / absence of the disc without playing. it can.

When a two-color LED is used as the display means, the presence / absence of a disc can be displayed by simultaneously lighting the two-color LEDs, thereby displaying the states of various types of discs in a narrow space.

[Brief description of drawings]

FIG. 1 is a system configuration block diagram of a disc display device of a disc changer according to a first embodiment of the present invention.

FIG. 2 is an external view of the display unit of the disc display device of the disc changer.

FIG. 3 (a) is an operation flowchart of the disk display device, and FIG. 3 (b) is an explanatory diagram showing correspondence between lighting states of respective two-color LEDs and disk states.

FIG. 4 is a flowchart of the operation of the second embodiment.

[Explanation of symbols]

 1 Compact Disc 2 Spindle Motor 3 Optical Pickup 4 Playback Control Unit 5 CD Changer Unit 6 Key Input Section 7 Display Section 8 Two-Color LED 9 Memory 10 Disk Rotation Control Section 11 Focus / Tracking Control Section 12 Signal Processing Section 13 Changer Control Section 14 System control unit 15 Disc tray open / close door 16 Stop button 17 Play button 18 Disc number selection button

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G11B 27/34 S 27/10 L

Claims (3)

[Claims] 1. A disk rotation control drive means for controlling and driving a disk which is a recording medium, a reproducing means for reproducing recorded data from the disk which is the recording medium, and a plurality of disks which are recording media. Disk changer means to be mounted on the disk rotation control driving means one by one, storage means for storing whether or not a disk as the recording medium exists at a predetermined position of the disk changer means, and the disk changer means Display means for displaying at least three states of whether there is a disk, which is the recording medium, corresponding to a predetermined position of the recording medium, whether there is the disk, or whether the presence or absence of the disk is unknown, and the disk changer for controlling the operation of each means. When the disc, which is the recording medium, is taken out from a predetermined position of the means and is reproduced, the storage is performed. If there is a disc in the tier, if the disc is taken out and cannot be played back, the storage means stores the absence of the disc, and if there is no storage based on the storage state of the storage means, the display means displays the presence or absence of the disc, Also, a disk display device of a disk changer, which is provided with a control means for displaying whether or not there is a disk according to a storage state. 2. The control means refers to the storage means by the operation of the user's key input section, and mounts the disc on the disc rotation control drive means from the disc position where the disc presence / absence of the disc changer means is stored and plays. The disc display device of the disc changer according to claim 1, wherein only the presence / absence of the disc is discriminated without storing the presence / absence of the disc. 3. The disc display device of the disc changer according to claim 1, wherein a two-color LED is used as the display means, and whether or not the disc is present is indicated by simultaneous lighting of the two-color LED.