JPH1173710A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the power saving or the prevention of a life from shortening due to the unnecessary operation by interrupting the power source of a device when any operation is not carried out until the power interrupted time which is judged in accordance with the using state of the device, is passed away. SOLUTION: By a system CPU part 50 which is furnished with a table 74a of power-off condition in an inside memory 74, plural power-off times are recorded in accordance with the combination of the informations such as, e.g. whether the optical disk 10 is loaded or not, a disk tray is closed or not, the final operation is the completion of the reproducing operation or not, and so on. When the changing states of the key operation, the close of the disk tray, etc., are detected during the time when the reproducing operation is stopped, the power-off time corresponding to the condition is read out from the table 74a of the power-off condition based on signals from a disk existence detector 71 and a disk open/close detector 72, and set in a time monitoring timer 73, then the count down is performed. When the set time is passed away with the state of no change, the power source is turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive having an auto power off function.

[0002]

2. Description of the Related Art Conventionally, there is an automatic power-off function which can determine that there is no use for the time being and temporarily turn off a power source when no operation is performed by a user for a predetermined time after the device is stopped.

[0003] However, since the standard for power-off is uniform, the device side will be dropped or the power will not be dropped irrespective of the user's will, resulting in a merit for the user. May be less.

[0004] That is, the function of auto power-off is intended to prevent the device from being left in an energized state when not in use. In the conventional auto power-off, if no operation is performed for a predetermined time after the last operation performed by the user, the power-off is performed mechanically.

However, depending on the setting of the time until the automatic power-off function is activated, the power frequently shuts down during the next operation, or the power remains on for a long time. In some cases, this can cause inconvenience to the user, or in rare cases will work.

[0006]

The object of the present invention is to eliminate the above-mentioned drawbacks, and to estimate the future frequency of use from information such as the current state of the device and its previous state and the contents of user operations. By setting the power-off operation and its operation time variably from the user, giving priority to the user's intention to use the device, and efficient power-off,
It is an object of the present invention to provide a disk device capable of realizing power saving and prevention of reduction in life due to unnecessary operation.

[0007]

A disk device according to the present invention has a function of reproducing data recorded on a disk and having a power shutoff function. A second method of determining a power-off time according to the use state of the device determined by the first determining means;
And a shutoff means for shutting off the power of the apparatus by the power shutoff function when no operation is performed until the power shutoff time judged by the second judgment means elapses. .

The disk device of the present invention reproduces data recorded on a disk and has a power cutoff function. A discriminating means for judging a use condition of the device, a power cutoff time corresponding to the use condition of the device. Reading means for reading, from the storage means, a power-off time corresponding to a use state of the apparatus determined by the storage means and the use state determined by the determination means; When no operation is performed, the power supply is cut off by the power cutoff function.

The disk device of the present invention has a power-off function for reproducing data recorded on the disk and determining a use state of the device, and a power-off time corresponding to the use state of the device. Reading means for reading from the storage means a power-off time corresponding to the use state of the apparatus determined by the determination means; It comprises a shutoff means for shutting off the power of the apparatus by the power shutoff function when no operation is performed, and a change means for changing a power shutoff time stored in the storage means.

The disk apparatus of the present invention reproduces data recorded on a disk placed on a disk tray, wherein the first detecting means detects whether or not the disk tray is closed. Second detecting means for detecting whether a disk is loaded in the apparatus, determining means for determining whether or not reproduction processing for the disk has been completed, and determining whether or not the disk tray is closed. Storage means for storing a power-off time in accordance with a combination of whether or not a disc is loaded in the apparatus and whether or not the reproduction processing for the disc has been completed; and the judgment means judges the end of the reproduction processing. Reading means for reading, from the storage means, a power-off time according to the detection results of the first and second detection means in a state where And when not perform any operations until the power-off time, which is read has passed by the reading means, and a blocking means for blocking the power supply of the device.

The disk device of the present invention reproduces data recorded on a disk placed on a disk tray, wherein the first detecting means detects whether or not the disk tray is closed. Second detecting means for detecting whether a disk is loaded in the apparatus, determining means for determining whether or not reproduction processing for the disk has been completed, and determining whether or not the disk tray is closed. Storage means for storing a power-off time in accordance with a combination of whether or not a disc is loaded in the apparatus and whether or not the reproduction processing for the disc has been completed; and the judgment means judges the end of the reproduction processing. Reading means for reading, from the storage means, a power-off time according to the detection results of the first and second detection means in a state where Shut-off means for shutting off the power supply of the apparatus when no operation is performed until the power-off time read by the reading means elapses, and change for changing the power-off time stored in the storage means It consists of means.

A disk device of the present invention reproduces data recorded on a disk and has a power-off function. A judging means for judging a use condition of the device, and a use condition of the device judged by the judging device. Changing means for automatically changing the power-off time according to the power-off time, and when no operation is performed until the power-off time changed by the changing means elapses, the power of the apparatus is turned off by the power-off function. It is composed of blocking means for blocking.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical disk device according to an embodiment of the present invention will be described with reference to the drawings. In order to avoid redundant description, common reference numerals are used for functionally common parts in a plurality of drawings.

FIG. 1 is a block diagram showing a configuration of an optical disk reproducing apparatus according to one embodiment of the present invention. This optical disk device includes a key operation / display unit 4, a remote controller 5, and a monitor unit 6 as parts constituting a visual user interface, and a speaker unit 8 (here, two channels) as a part constituting an auditory user interface. Stereo pair).

The optical disk apparatus further receives user operation information from the remote controller 5 and
A remote controller receiving unit 4A that notifies the U unit 50,
Disk drive unit 3 that rotationally drives optical disk 10
0, system CPU 50, system ROM / RAM 52, system processor 54, data RAM 5
6, video decoder unit 58, audio decoder unit 6
0, a sub-picture decoder section 62 and a D / A and data reproducing section 64.

The system processor 54 includes a system time clock (STC) 54A and a register 54B.
Contains. Similarly, the video decoder section 58, the audio decoder section 60, and the sub-picture decoder section 62 include system time clocks (STCs) 58A, 60A and 62A. The system processor unit 54 further determines the types of various packets included in the data reproduced from the optical disk 10 and transfers the data in the packets to the corresponding decoders (58 to 62). have.

The sub-picture decoder 62 further includes a decoder 62B for decoding the sub-picture data supplied from the system processor 54, and a highlight for performing a highlight process on the sub-picture data decoded by the decoder 62B. A processing unit 62C is provided.

The decoder 62B extends 2-bit-unit pixel data (sub-picture data) that has been run-length compressed in accordance with a predetermined rule in accordance with emphasized pixels, pattern pixels, background pixels, and the like.

The highlight processing unit 62C includes a system CP
XY indicating a rectangular area in which highlight information (for example, a menu selection item) supplied from the U unit 50 is displayed.
Highlight processing is performed according to coordinate values, color codes, and highlight color / contrast values. This highlighting process can be used as means for allowing the user to easily recognize the displayed specific item on the visual user interface using the monitor unit 6.

The data RAM unit 56 has a sub-picture menu,
The menu table 56A stores a start address of an audio menu, an angle menu, a chapter (program) menu, and the like. The highlight processing is used to emphasize a specific part of these menus.

If the color and contrast of each pixel of the decoded sub-picture data have been changed in accordance with the highlight information, the changed sub-picture data is converted to an image synthesizing section 64A in the D / A and reproduction processing section 64. Supplied to In the image synthesizing section 64A, the decoded main video data (video data) and the highlighted sub-video data (caption, menu, etc.) are synthesized, and the synthesized image is displayed on the monitor section 6.

When the user operates the key operation / display unit 4 (or the remote controller 5) in FIG.
The reproduction of the data recorded on the optical disk 10 is started. The data recorded on the optical disc 10 includes, in addition to video data (MPEG compressed data) including multi-angle blocks (interleaved recording), sub-video data (run-length compressed bitmap data) used for subtitle display and the like. ), Audio data in multiple languages (compressed data by MPEG or other methods) and / or multi-channel stereo audio data (linear PCM data with quantization of 16 to 24 bits and sampling of 48 to 96 kHz). These video / audio data are converted into analog video signals and audio signals before being output from the playback device. The monitor unit 6 displays a corresponding image according to the output video signal, and
Are adapted to generate a corresponding sound according to the output audio signal.

In FIG. 1, solid arrows between the block elements indicate data buses, and broken arrows indicate control buses. As shown in FIG. 2, the disk drive unit 30 shown in FIG.
2. It includes an optical head 32 (optical pickup), a feed motor 33, a focus circuit 36, a feed motor drive circuit 37, a tracking circuit 38, a head amplifier 40, and a servo processing circuit 44.

The optical disk 10 is mounted on a spindle motor 12 driven by a motor drive circuit 11,
The spindle motor 12 rotates at a predetermined linear speed. An optical head 32 that irradiates a laser beam to a data recording surface of the optical disk 10 directly below the optical disk 10.
Is arranged. The optical head 32 is mounted on a guide mechanism (not shown).

When a control signal (access signal) is supplied from the system CPU 50 of FIG. 1 to the servo processing circuit 44, a head movement signal is sent from the servo processing circuit 44 to the feed motor driving circuit 37 in response to the control signal. Supplied to Then, the feed motor drive circuit 37 supplies a drive signal corresponding to the head movement signal to the feed motor 33. The feed motor 33 includes the feed motor drive circuit 3
The optical head 32 rotates in accordance with a drive signal from the optical disk 7 and moves the optical head 32 in the radial direction of the optical disk 10 along a guide mechanism (not shown).

The optical head 32 has an objective lens 34 facing the optical disk 10. When reproducing recorded data from the optical disk 10, a laser beam is irradiated from the optical head 32 to the data recording surface of the optical disk 10 via the objective lens 34. At this time, the objective lens 34 is set so that the focusing of the optical head 32 is automatically performed on the data recording surface (pit) of the optical disc 10.
Moves slightly along its optical axis (focusing direction) according to the drive signal from the focus circuit 36. The objective lens 34 also slightly moves in the radial direction (tracking direction) of the optical disk 10 according to the drive signal supplied from the tracking circuit 38.

Due to the fine movement (focusing direction and tracking direction) of the objective lens 34, the laser beam from the optical head 32 becomes a minimum beam spot on a spiral track (pit row) on the data recording surface of the optical disk 10. Formed. Thus, the track on the data recording surface of the optical disk 10 is
The light beam spots from 2 automatically track (eg, at a constant linear velocity).

The feed motor 33 is driven, the optical head 32 is moved in the radial direction of the optical disk 10, and a predetermined sector formed on the data recording layer of the optical disk 10 is accessed by the optical head 32. The reproduction data read from the optical disk 10 as a result of this access is supplied from the optical head 32 to the head amplifier 40,
The signal is amplified by the head amplifier 40 and output from the disk drive unit 30.

The output reproduced data is stored in the system RO.
The data is stored in the data RAM unit 56 by the system processor unit 54 under the control of the system CPU unit 50 controlled by the program recorded in the M and the RAM unit 52.
The stored reproduction data is transmitted to the system processor unit 5
4 and classified into video data, audio data, and sub-picture data. The video data, audio data, and sub-picture data are output to the video decoder section 58, the audio decoder section 60, and the sub-picture decoder section 62, respectively, and decoded. Is done.

The decoded video data, audio data and sub-picture data are converted by a D / A and reproduction processing circuit 64 into analog video signals and analog audio signals. At the same time, the video signal and the sub-video signal are mixed and supplied to the monitor 6, and the audio signal is supplied to the speaker unit 8. As a result, an image corresponding to the video signal and the sub-video signal is displayed on the monitor unit 6 and a sound corresponding to the audio signal is reproduced from the speaker unit 8.

The operation of reproducing the optical disk of the apparatus shown in FIG. 1 is briefly summarized as follows. First, key operation /
When a reproduction instruction is input from the display unit 4, the system CPU
The unit 50 sends a target address and a read command to the optical disk drive unit 30.

The optical disk drive 30 rotates the optical disk 10 in accordance with the received read command, reads recorded data from the target address of the optical disk 10, and sends the data to the system processor 50.

The system processor unit 50 temporarily stores the transmitted data in the data RAM unit 56. The data type (video, audio, sub-picture) is determined based on the header information added to the stored data, and the video decoder unit 58, the audio decoder unit 60, and the sub-picture decoder are determined according to the determined type. Part 62
To the corresponding data.

Each of the decoder sections 58, 60 and 62 decodes the transferred data according to the respective data format, and outputs a signal of the decoded result to D / A.
And to the data reproduction processing unit 64. From the D / A and data reproduction processing section 64, a reproduction video signal in which sub-picture information (subtitles and the like) is superimposed is transmitted to the monitor section 6 as appropriate, and the reproduction video signal is sent to the stereo speaker section 8 of 2CH (or 8CH). An audio signal (including sound effects and environmental sounds as appropriate) synchronized with the signal is sent.

The video signal decoded by the video decoder 58 is sent to a pan scan signal conversion circuit (not shown) and a letter box signal conversion circuit (not shown). The converted video signal output from these two types of signal conversion circuits and the video decoder unit 5
8 is a video signal selection circuit (not shown) among the direct signals output directly from
And the D / A and data reproduction processing unit 64
Is forwarded to

A pan scan signal conversion circuit as described above,
The letterbox signal conversion circuit and the video signal selection circuit may be provided inside the video decoder unit 58 in FIG.

Optical disc 1 reproduced by the reproducing apparatus of FIG.
Various structures are conceivable for 0. For example, a read-only disc having a high recording density and a large capacity having a bonding structure as shown in FIG. 3 can be used in the reproducing apparatus of FIG.

As shown in FIG. 3, the optical disk 10
A pair of composite disk layers (single layer or two layers) 18 and an extremely thin (for example, 40 μm)
m-thick ultraviolet curable resin). Each composite disc layer 18 includes a transparent substrate (eg, 0.6 mm thick polycarbonate) 14 and a recording layer,
That is, the light reflection layer 16 (formed by depositing or sputtering aluminum, an aluminum alloy, or gold) is used. The pair of disk layers 18 are bonded together such that the light reflection layer 16 is in contact with the surface of the adhesive layer 20 to form a 1.2 mm thick high recording density optical disk.

The optical disk 10 is provided with a center hole 22. Around the center hole 22 on both sides of the disk, a clamping area 24 for holding the optical disk 10 during rotation is provided. The spindle of the spindle motor 12 shown in FIG. 2 is inserted into the center hole 22 when the disk 10 is loaded in the optical disk device. While the disk is being rotated, the optical disk 10 is clamped by a disk clamper (not shown) in the clamping area 24.

The optical disk 10 has an information area 25 on which video data, audio data and other information can be recorded, around the clamping area 24 on both sides thereof.

In the information area 25, a lead-out area 26 is provided in an outer peripheral area thereof, and a lead-in area 27 is provided in an inner peripheral area thereof in contact with the clamping area 24. A space between the lead-out area 26 and the lead-in area 27 is defined as a data recording area 28.

On the recording layer (light reflection layer) 16 of the information area 25, recording tracks as data recording areas are formed continuously in a spiral shape, for example. The continuous track is divided into a plurality of physical sectors, and these sectors are assigned serial numbers. Various data are recorded on the optical disk 10 using this sector as a recording unit.

Data recording area 28 of information recording area 25
Is an actual data recording area, and as reproduction information,
Video data (main video data), sub-video data, and audio data are recorded as similar pit strings (physical shapes that cause optical state changes).

In the read-only optical disk 10, a pit row is formed in advance on the transparent substrate 14 by a stamper, and a reflection layer is formed by vapor deposition or sputtering on the surface of the transparent substrate 14 on which the pit row is formed, and the reflection layer is formed. It will be used as the recording layer 16.

A read-only optical disk (DVD)
In the (ROM) 10, usually, no groove is provided as a recording track, and a pit row formed on the surface of the transparent substrate 14 functions as a track.
(However, the groove is provided in a DVD-RAM capable of recording / reproducing or reading / writing.) In the optical disk reproducing apparatus (DVD player) shown in FIG. 1, a user (viewer) is provided on a front panel of the apparatus main body. Key operation / display unit 4 or remote controller 5
By operating (a remote control device connected to the remote controller receiving unit 4A in the main body by infrared light communication), the recorded data, that is, the main video data, the sub video data, and the audio data are reproduced from the optical disc 10. The reproduced recorded data is converted into an audio (sound) signal and a video signal in the apparatus, sent to a monitor section 6 and a speaker section 8 outside the apparatus, and reproduced as video images and sounds.

On a front panel of a reproducing apparatus provided with a key operation / display section 4, for example, as shown in FIG. 4, a power (power) key 4a, a reproduction (play) key 4c, and a pause (pause) key 4d. , Stop key 4e,
There are provided a chapter / program skip key 4f, an open / close key 4g for instructing taking in / removing of the optical disc 10, a display window 4h, an insertion / exiting opening (disc tray) 4i of the optical disc 10, and the like.

In the main body of the disc tray 4i,
As shown in FIG. 1, a disk presence / absence detector 71 for detecting the presence / absence of the optical disk 10 on the disk tray 4i and a disk open / close detector 72 for detecting opening or closing of the disk tray 4i are provided.

The system CPU unit 50 is provided with a timer 73 for monitoring time, and an internal memory 74 is provided with a power-off condition table 74a. In the power-off condition table 74a, a power-off time is set according to whether or not the optical disk 10 is loaded and whether the disk tray 4i is closed or the reproducing operation is completed.

For example, as shown in FIG. 5, when the optical disk 10 is not loaded and the disk tray 4i is closed, a power off time of 10 minutes is recorded and the optical disk 10 is loaded. When the disc tray 4i is closed, a power-off time of 20 minutes is recorded, when the optical disc 10 is loaded, and when the final operation is the completion of the reproducing operation, 3 minutes.
A power off time of 0 minutes is recorded.

The contents set in the power-off condition table 74a can be arbitrarily changed by the user.
For example, the power-off condition change mode is selected by the remote controller 5 and the monitor unit 6, and the power-off time corresponding to whether the optical disk 10 is loaded and whether the disk tray 4i is closed or the reproduction operation is completed is changed. It is supposed to.

Next, the auto power-off function in the above configuration will be described with reference to the flowchart shown in FIG. That is, the system CPU unit 50
Performs initialization such as resetting the timer 73 (ST0). Then, it is checked whether or not the reproduction operation is stopped (ST1). If the result of this check is that the playback operation is in progress, the process returns to step 0. Thus, the reproducing operation is always in the initial state. As a result of the check, if the reproduction operation is stopped, the system CPU 50 checks whether there is a state change such as a key operation or the disc tray 4i being closed (ST2). As a result of this check, if there is a state change, the system CPU 50
The power-off time (power-off time Toff) corresponding to the presence / absence of 0 and the closed state of the disc tray 4i is read from the power-off condition table 74a (ST3), set in the timer 73 (ST4), and the timer 73 is counted down. The set time is compared with the elapsed time based on the last key operation to reach the current stop state (S
T5) When the set time coincides with the elapsed time, that is, when the timer 73 is zero, the power supply is turned off (ST).
6).

In this case, when the optical disk 10 is not loaded and the disk tray 4i is closed, the system CPU unit 50 sets 10 minutes to the timer 73 and turns off the power after 10 minutes.

When the optical disk 10 is loaded and the disk tray 4i is closed, the system CPU 50 sets 20 minutes in the timer 73,
When no operation is performed for 20 minutes, the power supply is turned off.

When the optical disk 10 is loaded and the final operation is the completion of the reproducing operation, the system CPU unit 50 sets 30 minutes to the timer 73, and the elapsed time during which no operation is performed is 30 minutes. At this time, the power supply is turned off.

The process returns to step 1 until the set time matches the elapsed time in step 5 described above. As a result of step 2, if there is no state change, that is, if no operation is performed while the system is stopped, the system CPU unit 50 proceeds to step 5.
The process proceeds to a comparison process between the set time and the elapsed time.

The setting of the power-off condition table 74a is not a value arbitrarily changed by the user, but may be a method in which the reproducing apparatus automatically adjusts the value by the operation of the user to achieve more optimization.

FIG. 7 is a flowchart for the automatic adjustment. ST1 to ST0 of the flowchart of FIG. 6 described above.
And whether or not to automatically adjust the power-off time Toff between ST3 and ST4.
Insert T8 (the contents of ST7 and ST8 are the same). When performing automatic adjustment, subroutines ST9 and ST for performing the processing.
After executing step 10 (the subroutines of ST9 and ST10 are the same), the process returns to the original state. When the automatic adjustment is not performed, the process returns to the original state, so that the processing is the same as the flowchart in FIG.

FIG. 8 shows a subroutine ST9, S in FIG.
One example of a flowchart of the content of T10. First, it is determined whether the timer 73 has reached the initial value (SR1).
In the case of the initial value, the subsequent operations are skipped and the operation returns to the original state. If it is not the initial value, the elapsed time is obtained from the value of the timer 73, and the data is recorded and updated as a database (SR
2).

An average value X and a standard deviation value α of the time of the record updated database are obtained (SR3). The power-off time is calculated from the average value X and the standard deviation value α (SR4).
The calculated value is, for example, a value obtained by adding a positive multiple of the standard deviation value α to the average value X. The power-off time Toff of the corresponding condition item in the power-off condition table 74a is updated with the obtained value (for example, K = 5) (SR5). Return to the original after updating.

If the timer 73 is at the initial value in the above subroutine, the playback operation is performed in the flow chart of FIG.
And ST0, when ST10 passes through ST9, and when playback is stopped during playback (that is, when the state changes), ST10 is passed through ST1, ST2, ST3, and ST8.
Since it is not the time during which both are stopped, the subsequent processing is skipped.

If the timer 73 is not the initial value, the timer 73 is stopped and loops through ST1, ST2, and ST5 to repeat the timer 73.
Is running, playback starts and ST1 to ST7
In the case where the timer 73 is reached via ST2 and the case where the state is changed and the state is changed to ST10 via ST2, ST3 and ST8 while stopped by key operation or the like, the timer 73 is stopped during the state where both are stopped and abandoned. Since it was operating, the value indicates the elapsed time of the state where it was stopped and abandoned. The elapsed time is a time until the user does something without leaving the user in a stopped state. That is the time the user needs to do something. Therefore, the power-off time may be longer than this elapsed time.

In the above description, the average value X is set to a value obtained by adding a positive multiple of the standard deviation value α, so that in most cases, the average value X is set to be longer than the elapsed time even if variations in the elapsed time are taken into consideration (probability Therefore, α is an appropriate value of 2 or more).

As a result, when the user's operation is always fast, both the average value X and the standard deviation value α become small, so that the power-off time Toff is shortened, and the unnecessary stop in the stopped state is shortened. Also, when the user's operation is slow or there is variation, at least one of the average value X and the standard deviation value α increases, so that the power-off time Toff becomes longer,
Power is rarely turned off before user operation, and optimization according to the user can be performed.

As a database, for example, 2 bytes are used for one elapsed time, and the data of the latest elapsed time is overwritten and stored with the fixed data of 256 items per item, and the power-off time Toff of FIG. 5 is updated. 768 data for three items, 1.5 Kbytes
The memory of e will be prepared.

In order to set the value of the power-off time Toff in FIG. 5 as the value of the database in the initial state, all data (256 data) of each item are initialized to the initial value of each item (10 minutes, 20 minutes). , 30 minutes). Here, 2 bytes are used for one elapsed time as an example,
One item is 256 data, but if the elapsed time is recorded with an accuracy of about 10 seconds, it can be reduced to 1 byte, and the number of data of one item can be about several tens.

However, errors and variations become large,
If the value of K at the time of calculating the power-off time Toff is increased, the possibility of the power-off being turned off can be reduced. Although the above description is based on the table in FIG. 5, even if the number of items in the table is different, a database memory corresponding to the number of items may be prepared in the system ROM / RAM unit 52. It should be noted that even if there is no table corresponding to FIG. 5, even if the system performs power-off at the same time in any state, if a database of one item is prepared and this processing is performed, there is no division of items in the table. ,
This is effective although the variation in data slightly increases and the effect slightly changes.

FIG. 9 shows a subroutine ST9, S of FIG.
Another example of the flowchart of the content of T10. In the example of FIG. 8, a memory is required for the database, and when the items are subdivided, the capacity of the memory increases. In this example, no database is created, so no memory is needed.

First, it is determined whether the timer 73 has reached the initial value (SR11). In the case of the initial value, the subsequent operations are skipped and the operation returns to the original state. Timer 7 if not initial value
3. The elapsed time is obtained from the value of 3, and the elapsed time and a certain value f
(Toff). (SR12) (where f (T
For off), a function, a correlation table, or the like that provides a shorter time than Toff is used.

For example, as a function, f (Toff) = Tof
As a result of comparison of a linear function such as f / 10-1 and a correlation table as shown in FIG. 10, when the elapsed time is larger than a certain value f (Toff), K1 (K1 ≧ 0) is set to the power-off time Toff.
Are used, such as constants, functions, and correlation tables. For example, the constant 0.
05, a function 0.01Toff, a correlation table as shown in FIG. 11, etc.) to calculate a new power-off time (SR1).
3).

Conversely, when the elapsed time is equal to or less than a certain value f (Toff), a constant, a function, a correlation table, or the like that satisfies K2 (K2 ≧ 0) is used from the power-off time Toff.
5, the function 0.01 Toff. A new power-off time is calculated by subtracting K1 (which may be the same as or different from K1 such as a correlation table as shown in FIG. 12) (SR14). The power-off time Toff of the corresponding condition item in the power-off condition table 74a is updated with the calculated power-off time (SR1).
5). Return to the original after updating.

The above subroutine branches off from FIG. 7, which is the same main routine as the subroutine of FIG. 8, and since the subroutine SR1 of FIG. 8 and this subroutine SR11 are the same processing, the power-off time is calculated only when the elapsed time is known. it can.

If the elapsed time is longer than the power-off time compared to a marginal value f (Toff), the margin is small, and the margin is increased by increasing the power-off time Toff. If the power-off time Toff is smaller than that in (1), the power-off time Toff may be reduced because the margin is large, and the power-off time Toff is reduced.

As a result, when the user's operation is always fast, the power-off time Toff is shortened, and the idle stop in the idle state is shortened. When the user's operation is slow, the power-off time Toff is increased, Power is rarely turned off before operation, and optimization can be performed according to the user.

As described above, the automatic power-off of the power supply is performed by estimating the frequency of use in the near future from recent operation contents, and providing the function of cutting off the product by itself based on the result. The time to reach can be set variably by itself.

According to the present invention, it is possible to obtain effects such as maximum power saving while keeping the user's intention to use the device as much as possible. Based on the state of the device that has stopped the user's intention and the recently changed state, the frequency of subsequent use is predicted, and whether or not the power-off operation is to be performed and the operation time are set. For example, in an optical disk device such as a DVD player, there is a high possibility that the disk will not be used as it is when the tray is closed without an optical disk, or when the software has been played and the playback is completed and left in a stopped state. It is highly likely that a later stop or a stop during playback will continue to be used thereafter. In consideration of these cases, an optimal power-off function is set to achieve compatibility between conflicting conditions.

[0076]

As described in detail above, according to the present invention, the frequency of use is estimated from the information such as the current state of the device and the previous state and the contents of the operation by the user, and the power is then estimated. Provide a disk device that can realize the power saving and the prevention of shortening of the life due to unnecessary operation by efficient power-off while giving priority to the user's intention to use the device by variably setting the operation of turning off and the operation time. it can.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an optical disc reproducing apparatus for describing an embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a disk drive unit.

FIG. 3 is a diagram showing a schematic configuration of an optical disc.

FIG. 4 is a diagram showing a schematic configuration of a key operation / display unit.

FIG. 5 is a diagram showing a storage example of a power-off condition table.

FIG. 6 is a flowchart for explaining an auto power off function.

FIG. 7 is a flowchart for explaining an automatic power-off function corresponding to automatic adjustment.

FIG. 8 is a flowchart for explaining an automatic adjustment process.

FIG. 9 is a flowchart illustrating an automatic adjustment process.

FIG. 10 is a diagram for explaining a correlation between a power-off time and an elapsed time.

FIG. 11 is a diagram for explaining a correlation between a power-off time and a function.

FIG. 12 is a diagram for explaining a correlation between a power-off time and a function.

[Description of Signs] 4 ... Key operation / display section 4i ... Disc tray 5 ... Remote controller 10 ... Optical disc 50 ... System CPU section 71 ... Disc presence detector 72 ... Disc open / close detector 73 ... Time monitoring timer 74 ... Internal memory 74a ... Power off condition table

Claims (6)

[Claims] 1. A disk device having a power-off function for reproducing data recorded on a disk and determining a use state of the device, and a device determined by the first determination device. A second determining means for determining a power-off time corresponding to a use state of the power supply; and a power-off time when no operation is performed until the power-off time determined by the second determining means elapses. A disk device, comprising: a cutoff unit that cuts off power to the device by a function. 2. A disk drive having a power-off function for reproducing data recorded on a disk and determining a use state of the apparatus, and a power-off time corresponding to the use state of the apparatus is stored. Storage means, read-out means for reading from the storage means a power-off time corresponding to the use state of the device determined by the determination means, and an operation performed until the power-off time read by the read-out means elapses. And a shutoff means for shutting off the power of the apparatus by the power shutoff function when the operation is not performed. 3. A disk drive having a power-off function for reproducing data recorded on a disk and determining a use state of the apparatus, and storing a power-off time according to the use state of the apparatus. Storage means, read-out means for reading from the storage means a power-off time corresponding to the use state of the device determined by the determination means, and an operation performed until the power-off time read by the read-out means elapses. A disk, comprising: a power-off function for turning off the power of the apparatus when the power-off function is not performed; and a changing means for changing a power-off time stored in the storage means. apparatus. 4. A disk device for reproducing data recorded on a disk placed on a disk tray, a first detecting means for detecting whether or not the disk tray is closed, wherein the disk is a device. Second detecting means for detecting whether or not the disc has been loaded; determining means for determining whether or not reproduction processing for the disc has been completed; and determining whether or not the disc tray has been closed. Storage means for storing a power-off time in accordance with a combination of whether or not the disk is loaded in the apparatus and whether or not the reproduction processing for the disc has been completed; and judging the end of the reproduction processing by the judgment means Reading means for reading out from the storage means a power-off time according to the detection results of the first and second detection means. And a shut-off means for shutting off the power supply of the apparatus when no operation is performed until the power-off time read by the read means has elapsed. 5. A disk device for reproducing data recorded on a disk placed on a disk tray, a first detecting means for detecting whether or not the disk tray is closed, and wherein the disk is a device. Second detecting means for detecting whether or not the disc has been loaded; determining means for determining whether or not reproduction processing for the disc has been completed; and determining whether or not the disc tray has been closed. Storage means for storing a power-off time in accordance with a combination of whether or not the disk is loaded in the apparatus and whether or not the reproduction processing for the disc has been completed; and judging the end of the reproduction processing by the judgment means Reading means for reading out from the storage means a power-off time according to the detection results of the first and second detection means. And a changer for changing the power-off time stored in the storage means, when no operation is performed until the power-off time read by the reading means has elapsed. Means, comprising: a disk device. 6. A disc drive having a power-off function for reproducing data recorded on a disc, a discriminating means for judging a use condition of the disc drive, and a discriminating means for discriminating the use condition of the discriminator determined by the discriminating means. Changing means for automatically changing the power cut-off time; and shutting off the power of the apparatus by the power cut-off function when no operation is performed until the power cut-off time changed by the changing means elapses. Means, comprising: a disk device.