JPH04248162A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To prevent useless power consumption by driving an LCD display with its back light having smaller power consumption than the other LCD display with its back light at the time of reproducing audio information and stopping the driving of the above LCD display with its back light having large power consumption. CONSTITUTION:In a player main body part 2 for reproducing a disk 15 stored with video information in addition to audio information and a CD-I player having the LCD display 13 with its back light 13a, the LCD display 13c with its back light 13b are provided separately from the LCD display 13 with its back light 13a having larger power consumption than the former, and the drive for the LCD display 13 and its back light 13a and the drive for the LCD display 13c and its back light 13b are selectively changed at the time of reproducing the audio information and at the time of reproducing the video information respectively.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc playback device suitable for use in a so-called CD-I player, which plays back a CD-I disc on which image information and the like are recorded in addition to audio information.

0002

[Prior Art] In addition to audio data, a CD (compact disc) contains image data (natural images, animation,
A CD that records computer graphics, etc.), text data, program data, etc., and can be operated interactively.
-I (CD Interactive) system has been proposed. Such a CD-I system supports characters,
Since it has the ability to playback images, audio, computer data, etc., it is useful for AV consumer electronics mainly for audio/visuals, electronic publishing mainly for text, database services mainly for information files, and education mainly for dialogue response.・It can be used for entertainment, etc., and is expected to be a new form of media. In the CD-I system, in order to maintain compatibility and make it widely available for home use,
Various specifications have been established. In other words, the CD-I system uses a 68000 series CPU (a 16-bit microprocessor developed by Motorola) and a real-time operating system that handles various files based on the widely used OS9. It will be done. Two trigger buttons and an XY device are used as input devices, and two output systems, audio and video, are provided. Furthermore, the CD-I player is designed to be able to play ordinary compact discs for music. The structure of such a CD-I player consists of a player body into which a disc is loaded and played, a lid on the player body, and two trigger buttons and an
- An inner lid in which a Y device, etc. is arranged and serves as a control panel, and an inner lid that serves as a control panel is protected, and a display section such as an LCD display is provided on its inner surface. Consists of an outer lid. Further, this CD-I player is driven using dry batteries or a commercial power source.

0003

[Problem to be solved by the invention] By the way, the above-mentioned CD
- In addition to enjoying music, the I-player is designed to play back computer data and perform various tasks and entertainment on the display surface of the LCD display, so it uses a relatively large LCD display. has been done. When such a large LCD display is used, the power consumption of the backlight is naturally as large as 3W, for example. However, when enjoying music with less information displayed on the LCD display, that is, when playing the CD-DA area of a CD-DA disc or CD-I/CD-DA disc, such a large LCD display is commonly used. This resulted in the inconvenience of wasting power. The present invention has been made in view of the above problems, and it is an object of the present invention to propose a disc playback device that can avoid wasting power consumption.

0004

[Means for Solving the Problems] The disc reproducing apparatus of the present invention, as shown in FIGS. 1 to 10, includes a reproducing means 2 for reproducing a disc 15 on which image information is stored in addition to audio information, and a main display section. 13, 13a, in addition to the main display sections 13, 13a, sub-display sections 13c, 13b dedicated to audio information reproduction, which consume less power than the main display sections 13, 13a, are provided. The main display section 13
, 13a and the sub-display sections 13c and 13b dedicated to audio information reproduction can be selectively switched.

[0005]

[Operation] According to the present invention described above, the main display sections 13, 13
Separately from the main display sections 13 and 13a, there are sub-display sections 13c and 13b dedicated to audio information reproduction, which consume less power than the main display sections 13 and 13a. Since the drive of the sub-display sections 13c and 13b dedicated to audio information reproduction is selectively switched, unnecessary power consumption can be avoided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the disc reproducing apparatus of the present invention will be described in detail below with reference to FIGS. 1 to 3. In FIG. 1, reference numeral 1 indicates the CD-I player of this example as a whole. This CD-I player 1 has an integrated LCD display 13 so that it can be easily carried outside, and is also made smaller and lighter by integrating circuits and using chip components. There is. This CD-
The overall size of the I-player 1 is, for example, 140 mm in width.
The length is 170mm and the height is 60mm.

[0007] Inside the case of the player body 2 of the CD-I player 1, there are a disk drive section that rotates the mounted disk 15, a head drive section that moves the optical head in the radial direction of the disk, and an optical head. A circuit board for signal processing of reproduced signals from is housed. Furthermore, 68
It houses a computer consisting of a 000 series CPU.

[0008] On the front side 2a of the player body 2, there are a headphone jack 3, a volume control dial 4, and a power on/off switch.
An off switch 5 is provided. In addition, the player main body 2
An open button 6 is disposed on the front upper edge of the front side surface 2a. On the player body 2 of the CD-I player 1,
The inner lid 7 is rotatably arranged. When the open button 6 is pressed, the inner lid 7 is opened as shown in FIG. When the inner lid 7 is opened, the disc 15 can be loaded/taken out. The inner lid 7 is provided with a window 8. A transparent member is disposed in this window portion 8. Through this window section 8,
The rotational state of the mounted disk 15 can be confirmed.

Further, on the front edge of the inner lid 7, a trigger button 10a, a trigger button 10b, and an XY device 11 are arranged. The X-Y device 11 is configured such that the position in the X direction and the Y direction can be specified by pressing the portions that are offset vertically and horizontally from the center. still,
As such an XY device 11, a pointing device such as a trackball, a mouse, or a joystick can be used. Further above the inner lid 7, the outer lid 1
2 is rotatably arranged. This outer lid 12 can be opened by hand. This outer lid 12 can be opened to an opening/closing angle of 90 degrees or more, and can be fixed at a predetermined opening/closing angle θ. On the back surface 12a of the outer cover 12, an LCD display 13 of, for example, 4 inches is disposed. When the outer cover 12 is opened, as shown in the figure, the LC
D display 13 is exposed and LCD display 1
You will be able to see screen 3. Furthermore, an LCD drive switch 14 is provided on the back surface 12a of the outer cover 12. By operating this LCD drive switch 14, ON/OFF of the LCD display 13 can be controlled. Further, as shown in FIG. 3, a CD-DA LCD display 13c is provided on the front surface of the outer cover 12. As shown in this Figure 3, the LC
When the D display 13 is not required, that is, when the CD-
When playing DA or playing the CD-DA area of a CD-I/CD-DA disc, as shown in Fig. 3, the outer cover 12 is folded down toward you, which is generally used widely. It can be used in the same way as a portable compact disc playback device. Also, this LC
D display 13c and this LCD display 13
It is assumed that the power consumed by the dedicated backlight 13b (see FIG. 6) of c is about 1.5W, for example (assuming that the power consumed by the LCD display and the dedicated backlight 13a of this LCD display 13 is 3W). 3, the CD-DA LCD display 13c is connected to the surface 12b of the outer cover 12 (13 in the figure).
Alternatively, the LCD display 13c may be provided on the side surface of the outer cover 12 (indicated by 13c'' in the figure).

Now, in the CD-I player in this example, the disk 15 is a CD-I disk, a CD-I/C
It is possible to play D-DA discs (discs containing a mixture of CD-I discs and CD-DA discs) and CD-DA discs (compact discs for normal music playback). Here, the data format of CD-I will be explained.

[0011] CD-I records data in a format based on CD-ROM. The data recording unit is a block, similar to a CD-ROM. One block corresponds to 98 frames. The capacity of one block is 6 (
Number of audio data) x 2 (stereo 2 channels) x
98 (number of frames) = 2352 bytes. CD-I
The recording capacity of the entire disc is approximately 640 MB in the case of a disc with a diameter of 12 cm. There are two types of CD-I data structures: Form 1 and Form 2. This corresponds to mode 1 and mode 2 of CD-ROM, respectively. Note that mode 1 in a CD-ROM is one in which an error detection code and an error correction code are added to one block of data to enable powerful error correction. Furthermore, mode 2 in the CD-ROM is such that no error detection code or error correction code is added and a large amount of user data can be taken.

In CD-I, Form 1 and Form 2 can be specified for each block, and Form 1 and Form 2 can be mixed on one disc. CD
The -I format differs from the CD-ROM format in that an 8-byte subheader is provided at the beginning of the user data. In this subheader, blocks in which audio, images, and data are recorded are time-division multiplexed in units of blocks. In order to process these in real time, necessary data is written in duplicate and stored. This subheader consists of four items: file number, channel number, submode, and data type.

That is, FIG. 4A shows the structure of Form 1. In form 1, sync (12 bytes) at the beginning
is provided, followed by a header (4 bytes) and further a subheader (8 bytes). After this, user data (2048 bytes) is provided, which includes an error detection code EDC (4 bytes), P parity (172 bytes) for error correction, and Q parity (1
04 bytes) is added. Form 1 has improved error correction capability, and is suitable for handling data such as character data and program data in which errors cannot be interpolated.

FIG. 4B shows the structure of Form 2. In form 2, a sink (12 bytes) is provided at the beginning, followed by a header (4 bytes), and further a subheader (8 bytes). After this, user data (2324 bytes) and a reserve area (4 bytes) are provided. This form 2 is suitable for handling interpolable data such as audio data and video data. The subheader added to the beginning of user data consists of the file number (2 bytes), channel number (2 bytes), submode (2 bytes), and data type (2 bytes), as shown in Figure 5. configured.

Four modes are determined for writing audio data on a CD-I. One mode has a sampling frequency of 44.1 kHz and a quantization bit count of 16 bits, which is the same recording method as the current CD-DA. This mode is intended for ultra high-fidelity playback. In one other mode, ADP is used as the recording method.
CM (adaptive differential PCM) is used. The sampling frequency is 37.8 kHz, and the number of quantization bits is 8 bits. In this mode, analog discs, i.e. LP
It can be played with record-like sound quality. Playback time is 2 hours in stereo and 4 hours in monaural. This mode is intended for high-fidelity playback.

In another mode, A is used as the recording method.
DPCM is used. The sampling frequency is 37.8
kHz, and the number of quantization bits is 4 bits. In this mode, you can play back with sound quality comparable to FM broadcasting. Playback time is 4 hours in stereo and 8 hours in monaural. This mode is intended for long-term high-fidelity playback.

In another mode, A is used as the recording method.
DPCM is used. The sampling frequency is 18.9
kHz, and the number of quantization bits is 4 bits. Playback time is 8 hours in stereo and 16 hours in monaural. This mode is intended for speech reproduction.

Next, image data will be explained. Image data is processed as follows depending on the type of image data. In the case of a natural image, the sampling frequency of the luminance signal Y is 7.6 MHz, the sampling frequency of the color difference signals U and V is 3.8 MHz, and they are sampled at a ratio of 4:2:2. Then, each bit is compressed to 4 bits and recorded, and when reproduced, it is made into 8 bits. In the case of graphics, a CLUT (color lookup table) is used. CLUT graphics are 256 colors (8 bits), 128 colors (7 bits), 1
There are 3 modes with 6 colors (4 bits), and you can select and use the color you need from 16 million colors.

In the case of animation, run-length codes are used. This compresses image data using color information and the length between pixels. You can use this code to create full-screen animations. Next, to explain about the disk, C
For D-I disks, mechanical dimensions such as outer diameter dimensions, center hole dimensions, and thickness; optical parameters such as refractive index and reflectance; recording parameters such as disk rotation direction, recording linear velocity, track shape, and track pitch; The usage environment and other conditions are all similar to those of a normal compact disc for music (CD-DA).

[0020] Then, whether or not it is a CD-I disc is determined by checking the TOC (Table
Of Contents). That is, CD-I disc or CD-
In the I/CD-DA disc, PSEC is set to 10 when (POINT=A0). On the other hand, for other disks, PSEC is 00 when (POINT=A0)
It is said that Therefore, P when (POINT=A0)
From SEC, CD-I disc or CD-I/CD-
You can determine whether it is a DA disk or another disk. and,
CD-I disc (POINT=A0, A1, A2)
The control field of is set to (01x0). CD-I/CD-DA disc (POINT=A0)
The control field is always set to (01x0), and the other control fields are set to (00x0). Therefore, from the control field, it is possible to determine whether the disc is a CD-I disc or a CD-I/CD-DA disc. The result of this determination is then supplied, for example, as a status signal to an LCD circuit 40, which will be described later.

Now, since CD-I includes audio data and requires high-speed processing in real time, processing is performed using machine language. The CPU for this purpose is the 68-bit CPU developed by Motorola.
000 series is specified. Furthermore, the CD-RTOS (real-time operating system) that handles various files is based on OS9, and its programs are incorporated into the system using ROM. As input devices, at least two trigger buttons and an XY device are prepared. There are also two output systems: audio and video. The CD-I player is designed to play music CD-DA.

FIG. 6 shows the internal configuration of the CD-I player of this example. In FIG. 6, the disk 15 is rotated by a spindle motor 21 at CLV (constant linear velocity). The rotation of the spindle motor 21 is controlled by a spindle servo circuit 22 based on a clock reproduced by a CD reproduction circuit 28. Further, the output of the system controller 20 is supplied to the spindle servo circuit 22 . The recording signal of the disk 15 is transmitted to the optical head 2.
It is played in 3. Optical head 23 is supported by a two-axis device. The output of the focus/tracking servo circuit 25 is supplied to this two-axis device. The output of the system controller 20 is supplied to the focus/tracking servo circuit 25 . A focus/tracking servo circuit 25 applies servo to the optical head 23 in two axes, the focusing direction and the tracking direction, based on the output of the photodetector. Further, the optical head 23 is movable in the radial direction of the disk 15 by a slide feed mechanism 24 using, for example, a linear motor. This slide feeding mechanism 24 is controlled by a thread servo circuit 26. Thread servo circuit 26
is supplied with the output of the system system controller 20. This slide feed mechanism 24 allows the optical head 23 to access a desired track position.

The output of the optical head 23 is supplied to a CD reproducing circuit 28 via an RF amplifier 27. The CD reproducing circuit 28 is composed of a bit clock reproducing circuit and the like. In the CD playback circuit 28, the output of the optical head 23 is EFM demodulated and subjected to error correction processing. This CD playback circuit 28
is controlled by the system controller 20. CD
The output of the reproducing circuit 28 is supplied to a CD-ROM reproducing circuit 29. The CD-ROM playback circuit 29 includes a sync detection circuit, a descrambling circuit, an error correction circuit, and the like. A sync is detected by the CD reproducing circuit 28, and the scrambler is released. Then, the header address is checked and the target block is accessed. In the case of Form 1, error correction processing is further performed. This CD-ROM playback circuit 29 is controlled by a system controller 20.

The system controller 20 receives input from an input device 30 . The input device 30 consists of two trigger buttons 10a and 10b and an XY device 11. 31 is a CP for controlling the CD-I system
It is U. As the CPU 31, a 68000 series CPU is used. The CPU 31 includes a master controller 3.
2 is connected. Further, the CPU 31 and the system controller 20 are bidirectionally connected. A bus 33 is derived from the CPU 31. Note that the CPU 31 and the master controller 32 may be integrated into one chip. The data reproduced by the CD-ROM reproduction circuit is sent to the bus 33. The bus 33 includes a video controller 3.
RAMs 35a and 35b are connected via 4a and 34b, respectively. The bus 33 also includes a system ROM 36.
, a backup non-volatile RAM 37 are bidirectionally connected. The bus 33 also includes an audio decoder 38.
is connected.

Image data of the data reproduced by the CD-ROM reproduction circuit 29 is processed under the control of the CPU 31.
The signals are supplied to video controllers 34a and 34b, respectively. Video controllers 34a and 34b form a video signal based on this image data. This video signal is supplied to a video synthesizer 39. This video synthesizer 39 synthesizes the video signal from the video controller 34a and the video signal from the video controller 34b. The output of the video synthesizer 39 is sent to the LCD display 1 via the LCD circuit 40.
3 or LCD display 13c. This LCD circuit 40 is supplied with a status signal of the disc loaded in the player body 2 from the CPU 31 via the bus 33, and when a CD-DA is played back by this signal, a display information signal is sent to the LCD display 13c for the CD-DA. At the same time, the backlight 13b is turned on. On the other hand, this LCD circuit 40 is supplied with a status signal of the disc mounted in the player body 2 from the CPU 31 via the bus 33, and this signal causes the LCD circuit 40 to
When playing other than A, a display information signal is supplied to the LCD display 13, and the backlight 13a is turned on. Moreover, the driving of this LCD display 13 is as follows.
It can be turned on/off by the LCD drive switch 14.

Audio data of the data reproduced by the CD-ROM reproduction circuit 29 is supplied to an audio decoder 38 under the control of the CPU 31. If the audio data is ADPCM, the audio decoder 38 decodes the ADPCM. The decoded audio data is supplied to the DA converter 41 and converted into an analog signal. Then, the headphone output terminal 3 is connected via a low-pass filter 42 and an amplifier 43.
is output from. The audio signal level output from the headphone output terminal 3 can be set using the volume adjustment dial 4.

Next, the operation will be explained. Figure 7 shows the LC
This shows the operation when the D display 13 is turned on. First, in step 51, when the power is turned on using the power on/off switch 5 (see FIG. 1), it is determined whether the calendar and internal clock are to be set.
If “YES”, the process moves to step 52; if “NO”, the process moves to step 53. In step 52, X-
The calendar and internal clock are set by operating the Y device and trigger buttons 10a and 10b. Then, the process moves to step 53. In step 53, it is determined whether or not the disk 15 has been installed. If "YES", the process moves to step 56, and if "NO", the process moves to step 54.
to move to. In step 54, when the disk 15 is not mounted, the LCD display 1 is displayed as shown in FIG. 8A.
In the display area 45 of No. 3, a display indicating that a disc is not loaded is displayed, and in the display area 46, a calendar and time are displayed. Then, the process moves to step 55.

In step 55, it is determined whether or not the disk 15 is mounted. If ``YES'', the process moves to step 56. In step 56, the TOC on the innermost circumference of the disk 15 is accessed. and step 57
to move to. In step 57, from the TOC data,
First, it is determined whether the disc is a CD-I/CD-DA disc, a CD-I disc, or a CD-DA disc. That is,
For CD-I discs or CD-I/CD-DA discs, PSEC is set to 10 when (POINT=A0), and for other discs, PSEC is set to 00 when (POINT=A0). , (POINT=A
0) from the PSEC, CD-I disk or C
It is determined whether the disc is a DI/CD-DA disc or a CD-DA disc.

In step 58, the display when the CD-DA disc is loaded is displayed on the LCD display 13c.
done to. That is, when a CD-DA disc is loaded, as shown in FIG. -D
Operation keys such as PLAY, AMS, and STOP for operating A are displayed. Incidentally, at this time, the LCD circuit 40 to which the status signal is supplied from the CPU 31,
As shown in FIG. 8B, the LCD display 13 does not display information, that is, is not driven, and the backlight 13a of the LCD display 13 is also turned off. Then, the process moves to step 59. In step 59, the operation keys displayed in the display area b by the user are the X-Y device 11 and the trigger button 10.
When an operation is performed via a and 10b, the CD-DA disc is played according to this operation. Then, as shown in FIG. 10, the currently accessed song number and current operating state are displayed. In step 57, C
If it is determined that the disc is not a D-DA disc, the process moves to step 60. In step 60, it is determined whether the disc is a CD-I disc or a CD-I/CD-DA disc. That is, (POINT
= A0, A1, A2) control field is (0
1×0), and (P
The control field of OINT=A0) is always (0
1x0), and the other control fields are (00
x0), it is determined from this control field whether it is a CD-I disc or a CD-I/CD-DA disc. Then, the process moves to step 61.

In step 61, a message is displayed on the LCD display 13 indicating that a CD-I disc is loaded. That is, when a CD-I disc is loaded, a display indicating that the disc is loaded is displayed in the display area 45 of the LCD display 13, and the title of the application software is displayed in the display area 47, as shown in FIG. 9C. Then, the process moves to step 62. In step 62, the user selects the X-Y device 11, trigger button 10, as supported by the application software.
When operating using a and 10b, C
The D-I disc is played back. Now step 60
When it is determined that the disc 15 is not a CD-I disc, it is determined that the loaded disc 15 is a CD-I/CD-DA disc, and the process moves to step 63. - When a DA disc is loaded, as shown in FIG. 9D, a display indicating that the disc is loaded is displayed in the display area 45 of the LCD display 13, and PLAY, AMS, and STOP for operating the CD-DA are displayed in the display area 46. , etc. are displayed, and the title of the application software is displayed in the display area 47. Then, the process moves to step 64.

In step 64, the user operates the XY device 11 and the trigger buttons 10a and 10b, and selects playback according to this operation. and step 65
to move to. In step 65, it is determined whether or not CD-DA playback has been selected. If "YES", the process moves to step 66; if "NO", the process moves to step 67. In step 66, as shown in FIG. 10, for example, L
The C mounted on the display area a of the CD display 13c
A display indicating the number of songs on the D-DA disc is displayed, and in display area b, PLAY, AMS,
Operation keys such as STOP are displayed. Also, at this time, the LCD to which the status signal is supplied from the CPU 31
The circuit 40 causes the LCD display 13 to
As shown in FIG. 2, information is not displayed, that is, the LCD display 13 is not driven, and the backlight 13a of the LCD display 13 is also turned off. in this case,
The operation key displayed in display area b by the user is
When operated via the Y device 11 and the trigger buttons 10a and 10b, only the CD-DA area is played according to this operation, and as shown in FIG. 10, the currently accessed song number and current operating status are displayed. is displayed. The operation keys displayed in the display area 46 are pressed by the user to
When operated via the Y device and the trigger buttons 10a and 10b, only the CD-DA area portion is played according to this operation. In step 67, when the user operates the XY device 11 and the trigger buttons 10a and 10b according to instructions from the application software, the CD-I/CD-DA is played back in response to this operation.

In this way, in this example, CD-I/CD-
In the case of a DA disc, only the CD-DA area can be played back, so that only the sound of the application software can be enjoyed. Further, when playing a CD-DA disc in this manner, only audio playback is performed, so the LCD display 13 arranged on the inner surface of the inner lid 7 is not displayed and the backlight 13a is Turn off the light. Also, CD-I
Even when only audio reproduction is performed on a CD-DA disc, the display on the LCD display 13 is unnecessary, so the display is not displayed on the LCD display 13 and the backlight 13a is turned off. In this way, the LCD display 13 is not driven when there is no need for screen display, so that power is not wasted.

[0033] In addition to the trigger button 10a, the trigger button 10b, and the X-Y device 11, a dedicated key for audio playback may be provided; This leads to an increase in size. Therefore, in this example, when the mounted disc is a CD-DA disc and the drive of the LCD display 13 is turned off, or when the mounted disc is a CD-I/CD-D disc,
When the drive of the LCD display 13 is turned off for the A disc, as described above, the minimum display is displayed on the LCD display 13c of the minimum necessary size provided exclusively for audio reproduction, and the LCD display 13
The backlight 13b exclusively for c is turned on. Further, trigger button 10a, trigger button 1
0b and the XY device 11 are made to function as dedicated keys for audio reproduction. That is, for example, the trigger button 10a is the "PLAY/PAUSE key", the trigger button 10b is the "STOP key", and the
The left and right directions of the Y device 11 function as "AMS keys." As a result, various audio playback operations can be performed freely without providing a dedicated switch or the like. Also, when turning on/off the LCD display 13 using the LCD drive switch 14, the CD-D
Since video playback is not performed on A disc, CD-
When the DA disk is installed, the LCD display 13
The trigger button 10a, the trigger button 10b, and the XY device 11 may be made to function not only as on/off keys but also as dedicated keys for audio reproduction. Further, regardless of the type of disc, if the LCD display 13 is turned off, the trigger button 10a, trigger button 10b, and XY device 11 may function as dedicated keys for audio reproduction. In this case, for example, these trigger buttons 10a,
A mark indicating the function may be displayed near where the trigger button 10b and the XY device 11 are arranged.

As is clear from the above, in this example, the CD-
When playing back audio from a DA disc or CD-DA area, the minimum necessary information is displayed on the minimum size LCD display 13c, which consumes less power than the LCD display 13, and also consumes less power than the backlight 13a. Since the small backlight 13b is turned on and the backlight 13a is turned off at the same time as driving of the LCD display 13 is stopped, unnecessary power consumption can be avoided.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.

[0036]

According to the present invention described above, a sub-display section dedicated to audio information reproduction, which consumes less power than the main display section, is provided separately from the main display section. Since the drive of the main display section and the drive of the sub-display section dedicated to audio information reproduction are selectively switched, there is an advantage that unnecessary power consumption can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a disc playback device of the present invention.

FIG. 2 is a perspective view showing an example of the disc playback device of the present invention.

FIG. 3 is a perspective view showing an example of the disc playback device of the present invention.

FIG. 4 is a diagram showing the form of an example of the disc playback device of the present invention.

FIG. 5 is a diagram showing a subheader of an example of the disc playback device of the present invention.

FIG. 6 is a block diagram showing the internal configuration of an example of the disc playback device of the present invention.

FIG. 7 is a flowchart of an example of the disc playback device of the present invention.

FIG. 8 is a diagram showing a display state when a disc is not inserted and when a CD-DA disc is inserted in an example of the disc reproducing apparatus of the present invention.

FIG. 9 is a diagram showing a display state when a CD-I disc and a CD-I/CD-DA disc are inserted in an example of the disc reproducing apparatus of the present invention.

FIG. 10 is a diagram showing a display state of an LCD display for a CD-DA disc in an example of the disc playback device of the present invention.

[Explanation of symbols]

2 Player body part 7 Inner lid 13 LCD display 13c LCD display 13a Backlight 13b Backlight 15 Disc

Claims (1)

[Claims] Claim 1. A disc playback device comprising a playback means for playing back a disc in which image information is stored in addition to audio information, and a main display section, wherein the main display section and the main display section have a display unit that consumes less than the main display section. A sub-display section dedicated to reproducing audio information with low power is provided, and driving of the main display section and drive of the sub-display section dedicated to reproducing the audio information are selected depending on when reproducing the audio information and when reproducing the image information. 1. A disc playback device characterized in that the disc playback device is configured to switch automatically.