JP2004152342A - Optical disk recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the highest possible capability of each of a bus power system and a self-power system when electric power supplies of two kinds of these systems are possible. <P>SOLUTION: The device provided with an interface with which data transfer and electric power supply and reception are made possible is provided with an external power source terminal which receives the power source supply from the outside, an electric power supply system discriminating means which discriminates the electric power supply system, an electric power supply capability deciding means which decides the electric power supply capability of the interface, and a control means which refers to the result of the discrimination of the electric power supply system, operates the respective sections with a rated electric power consumption mode when the electric power supply is performed through the external power source terminal, operates the respective sections with a low electric power consumption mode when the electric power supply is not performed through the interface, further refers to the electric power supply capability and operates the respective sections with the prescribed low electric power consumption mode when the electric power supply capability falls below the prescrived value. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical disk recording / reproducing apparatus, and more particularly, to an optical disk recording / reproducing apparatus having an interface such as a USB configured to enable data transfer and power supply / reception with another device (PC).
[0002]
[Prior art]
In the case of a computer peripheral device such as an optical disk recording / reproducing device, an interface such as a USB (Universal Serial Bus) configured to enable data transfer and power supply / reception with another device (host PC) such as a computer is provided. Things exist.
[0003]
When the optical disk recording / reproducing device 100 as such a peripheral device is connected to the host PC 300 by a USB interface, the connection is made by a USB interface cable 200 as shown in FIG.
[0004]
4, the data transfer between the PC 300 and the optical disc recording / reproducing apparatus 100 and the power supply from the host PC 300 to the optical disc recording / reproducing apparatus 100 can be simultaneously performed by the USB interface cable 200. Become. Such a connection is called a bus power system.
[0005]
In the case of the USB interface, pin assignments of Data +, Data-, GND, Vcc, and GND are defined, and standards are defined so that power up to 5 V and 0.5 A (2.5 W) can be supplied. ing.
[0006]
On the other hand, when power of 2.5 W or more is required, a connection called a self-power system as shown in FIG. 5 is performed. That is, data transfer is performed between the PC 300 and the optical disk recording / reproducing device 100 by the USB interface cable 200, and the power of the optical disk recording / reproducing device 100 is provided by a dedicated power supply such as an AC adapter 400.
[0007]
Conventional optical disk recording / reproducing apparatuses have been designed in a self-powered manner in order to be used in a stationary state in combination with a stationary host PC. That is, it is designed to require high speed instead of consuming 2.5 W or more of power.
[0008]
On the other hand, in addition to a stationary host PC, it is increasingly used in combination with a portable PC such as a notebook PC, and the convenience of a bus-powered system that can be connected with a single cable is also required. It is becoming.
[0009]
Here, when trying to operate the optical disk recording / reproducing device designed for the self-powered system by the bus-powered system, the drive malfunctions or the system hangs because the required power supply cannot be received. Occurs.
[0010]
In addition, in an optical disk recording / reproducing device designed with limited power consumption for a bus power system, it is difficult to operate such as installing a wide band amplifier that consumes large power, rotating a spindle motor at high speed, and seeking an optical pickup at high speed. Was forced to sacrifice.
[0011]
It should be noted that, in an optical disk reproducing apparatus used for a notebook PC, a countermeasure is described in Patent Document 1 below to control the rotation speed of a spindle motor and the feed speed of an optical pickup according to the remaining capacity of a battery of the notebook PC. ing. However, the technology described in Patent Document 1 has a battery built in the optical disk reproducing apparatus, and even when a commercial power supply is used, the battery passes through the battery, and only the voltage of the battery of the notebook PC is monitored. Therefore, it could not be applied to the application in question in the present invention.
[0012]
[Patent Document 1]
JP-A-9-330551 (page 4, FIG. 5)
[0013]
[Problems to be solved by the invention]
As described above, in the optical disc recording / reproducing apparatus in which there are two types of power supply systems, the bus power system and the self-power system, the maximum performance within each range is obtained regardless of which system is operated. A mechanism that makes use of has not been proposed yet.
[0014]
In the bus power system applied to the present invention, a stable voltage (for example, 5 V) is generated on another device (PC) and then supplied to an optical disk recording / reproducing device. In the simple voltage monitoring as described in No. 1, it was not possible to control the optical disk recording / reproducing apparatus to operate at the maximum performance according to the power supply capability.
[0015]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and is applicable to an optical disc recording / reproducing apparatus having two types of power supply systems, a bus power system and a self-power system. It is another object of the present invention to realize an optical disk recording / reproducing apparatus capable of utilizing the maximum performance in each range.
[0016]
[Means for Solving the Problems]
That is, the present invention as means for solving the above-mentioned problems is as described below.
[0017]
(1) The invention according to claim 1 is an optical disc recording / reproducing apparatus having an interface configured to enable data transfer and power supply / reception with another device, wherein the optical disc recording / reproducing apparatus is provided through the interface. An external power supply terminal capable of receiving a large power supply from an external power supply means, a power supply system determining means for determining a system on which power is supplied, and a control means for controlling an operation state of each unit, The control unit refers to the determination result of the power supply system determination unit, and when the power supply is performed via the external power supply terminal, causes each unit to operate in a rated power consumption mode. An optical disk recording / reproducing apparatus, characterized in that when it is performed via a control unit, the respective parts are controlled to operate in a low power consumption mode.
[0018]
According to the present invention, when data transfer and power supply exchange with another device are configured to be possible, the control unit refers to the determination result of the power supply system determination unit, and the power supply connects the external power supply terminal. When the power supply is performed via the interface, control is performed so that each unit operates in the low power consumption mode when the power supply is performed via the interface. It is desirable that the external power supply terminal be capable of supplying power larger than that of the interface.
[0019]
As a result, in an optical disc recording / reproducing apparatus in which there are two types of power supply systems, a bus power system that receives power supply from another device and a self-power system that uses an external power supply, when operating in either system. However, it is possible to utilize the maximum performance in each range.
[0020]
(2) The invention according to claim 2 is an optical disk recording / reproducing apparatus including an interface configured to enable data transfer and power supply / reception with another device, wherein power is supplied from the interface. Power supply capacity determining means for determining the power supply capacity when the power supply capacity is received, and control means for controlling the operation state of each unit. The control means refers to the determination result of the power supply capacity determination means, Is determined to be lower than a predetermined value, the optical disk recording / reproducing apparatus is controlled to operate each unit in a predetermined low power consumption mode according to the determination result.
[0021]
According to the present invention, when data transfer and power supply / reception can be performed with another device, the control unit refers to the determination result of the power supply capability determination unit, and determines whether the power supply capability is higher than a predetermined value. If it is determined that the power consumption has also decreased, control is performed such that each unit is operated in a predetermined low power consumption mode according to the determination result.
[0022]
In this case, it is preferable that the power supply capability determination unit performs an operation in a test mode in which a predetermined current flows to another device, and determines the power supply capability based on a voltage change occurring at this time.
[0023]
As a result, in an optical disc recording / reproducing device that has a bus-powered power supply system that receives power supply from another device, it is possible to utilize the maximum performance within the capability of the other device being supplied power become.
[0024]
(3) The invention according to claim 3 is an optical disc recording / reproducing apparatus provided with an interface configured to enable data transfer and power supply / reception with another device, wherein the optical disc recording / reproducing apparatus is provided through the interface. An external power supply terminal capable of receiving a large power supply from an external power supply means, a power supply system determination means for determining a system to be supplied with power, and a power supply capability when receiving power supply from the interface. Power supply capability determining means for determining the operation state of each part, the control means refers to the determination result of the power supply system determination means, the power supply via the external power terminal If the power is supplied through the interface, the components are operated in the low power consumption mode. In the case where it is determined that the power supply capability is lower than a predetermined value, the power supply capability determination unit refers to the determination result of the power supply capability determination unit. An optical disc recording / reproducing apparatus, which controls each unit to operate in a power mode.
[0025]
According to the present invention, when data transfer and power supply exchange with another device are configured to be possible, the control unit refers to the determination result of the power supply system determination unit, and the power supply connects the external power supply terminal. When the power supply is performed via the interface, control is performed so that each unit operates in the low power consumption mode when the power supply is performed via the interface. It is desirable that the external power supply terminal be capable of supplying power larger than that of the interface.
[0026]
As a result, in an optical disc recording / reproducing apparatus in which there are two types of power supply systems, a bus power system that receives power supply from another device and a self-power system that uses an external power supply, when operating in either system. However, it is possible to utilize the maximum performance in each range.
[0027]
Also, the control unit refers to the determination result of the power supply capability determination unit, and when it is determined that the power supply capability is lower than a predetermined value, the control unit performs a predetermined low power consumption mode according to the determination result. Control each part to operate. In this case, it is preferable that the power supply capability determination unit performs an operation in a test mode in which a predetermined current flows to another device, and determines the power supply capability based on a voltage change occurring at this time.
[0028]
As a result, in an optical disc recording / reproducing device that has a bus-powered power supply system that receives power supply from another device, it is possible to utilize the maximum performance within the capability of the other device being supplied power become.
[0029]
(4) The invention according to claim 4, wherein the control means switches a transfer rate in data transfer via the interface between a rated power consumption mode and a low power consumption mode. An optical disk recording / reproducing apparatus according to claim 3.
[0030]
In the present invention, in the above (1) to (3), the control means controls to switch the transfer speed in data transfer via the interface between the rated power consumption mode and the low power consumption mode.
[0031]
In this case, the transfer speed is switched at high speed in the rated power consumption mode, and the transfer speed is switched at high speed in the low power consumption mode. In order to switch the transfer speed, a plurality of data transfer circuits (interface circuits) may be provided, or a single data transfer circuit (interface circuit) may be given a speed switching command.
[0032]
As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0033]
(5) The invention according to claim 5, wherein the control means switches the frequency of the operation clock supplied to each unit between the rated power consumption mode and the low power consumption mode, or in a plurality of low power consumption modes. An optical disk recording / reproducing apparatus according to any one of claims 1 to 4, wherein:
[0034]
In the present invention, in the above (1) to (4), the control means switches the frequency of the operation clock supplied to each unit between the rated power consumption mode and the low power consumption mode, or in a plurality of low power consumption modes. Is controlled.
[0035]
In this case, the clock frequency is switched to the higher clock frequency in the rated power consumption mode, and the clock frequency is switched to the lower clock frequency as the power consumption mode becomes lower.
[0036]
As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0037]
(6) The invention according to claim 6, wherein the control means switches a rotation speed of a spindle motor for rotating and driving the optical disc in a rated power consumption mode and a low power consumption mode, or in a plurality of low power consumption modes. An optical disk recording / reproducing apparatus according to any one of claims 1 to 5, characterized in that:
[0038]
In the present invention, in the above (1) to (5), the control means controls the rotation speed of the spindle motor for driving the optical disk in the rated power consumption mode and the low power consumption mode, or in a plurality of low power consumption modes. Controlling to switch.
[0039]
In this case, the rotation speed is switched to a higher rotation speed in the rated power consumption mode, and is switched to a lower rotation speed as the power consumption mode becomes lower.
[0040]
As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0041]
(7) The invention according to claim 7 is that the control means switches the seek speed in the seek operation of the optical pickup between the rated power consumption mode and the low power consumption mode, or between a plurality of low power consumption modes. An optical disk recording / reproducing apparatus according to any one of claims 1 to 6, wherein:
[0042]
In the present invention, in the above (1) to (6), the control means switches the seek speed in the seek operation of the optical pickup between the rated power consumption mode and the low power consumption mode, or between a plurality of low power consumption modes. Is controlled.
[0043]
In this case, the mode is switched to a high seek speed in the rated power consumption mode, and is switched to a lower seek speed as the power consumption mode becomes lower. To switch the seek speed, the voltage applied to the optical pickup may be changed, or the speed profile for speed control may be changed.
[0044]
As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0045]
(8) The invention according to claim 8, further comprising a cache memory for storing a predetermined amount of data to be written to the optical disk, wherein the control means stores the data to be written in the cache memory in the low power consumption mode. 8. The write sequence control according to claim 1, wherein write sequence control is performed such that data read from the cache memory is written to the optical disk in an order that minimizes a seek operation distance of the optical pickup. An optical disk recording / reproducing apparatus according to any one of the above.
[0046]
According to the present invention, in the above (1) to (7), when a cache memory for storing a predetermined amount of data to be written to the optical disk is provided, the control means stores the data to be written in the cache memory in the low power consumption mode. The write sequence control is performed so that the data read from the cache memory is written to the optical disc in an order that minimizes the seek operation distance of the optical pickup.
[0047]
By performing writing in such an order that the seek operation distance is minimized, it is possible to minimize the power consumption required to write a fixed amount of data on the optical disk.
[0048]
As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0049]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiment, an optical disk recording / reproducing apparatus having an interface configured to enable data transfer and power supply / reception with another device such as a computer (PC) will be described as a specific example. .
[0050]
Further, as an interface configured to be capable of data transfer and power supply / reception with another device (PC), a USB (Universal Serial Bus) will be described as a specific example.
[0051]
FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention. In FIG. 1, reference numeral 100 denotes an optical disk recording / reproducing apparatus according to the present embodiment, which is a type of peripheral device connected to a computer (host PC) via a USB interface.
[0052]
Reference numeral 200 denotes an interface cable for connecting the optical disc recording / reproducing apparatus 100 to the host PC, and reference numeral 300 denotes a host PC connected to the optical disc recording / reproducing apparatus 100 via the interface cable 200.
[0053]
The optical disk recording / reproducing apparatus 100 described above is connected as shown in FIG. 1, so that data transfer between the PC 300 and the optical disk recording / reproducing apparatus 100 and power supply from the host PC 300 to the optical disk recording / reproducing apparatus 100 are performed. The interface cable 200 is configured to be able to perform the operation at the same time.
[0054]
Reference numeral 101 denotes a control unit that controls the operation state of each unit of the optical disc recording / reproducing apparatus 100. As described later, the control unit 101 refers to the determination result or the determination result to set each unit to the rated power consumption mode or the low power consumption mode. Control to operate in power mode.
[0055]
Reference numeral 102 denotes an external power supply terminal that receives power from a power supply such as an external AC adapter as a self-powered system. The power supply means for supplying necessary power from the power supply terminal to each unit in the optical disk recording / reproducing apparatus 100 is well known and is omitted. It is desirable that external power supply terminal 102 be capable of receiving a larger amount of power supply from an external power supply means than through interface cable 200.
[0056]
Reference numeral 103 denotes an interface terminal configured to be able to receive power supply via an interface cable as a bus power system and to transfer data via the interface cable.
[0057]
Reference numeral 104 denotes a power supply system determination unit that determines a system (an external power supply terminal 102 side / interface side) to which power is supplied. In the optical disc recording / reproducing apparatus 100, in the case of USB, since power supply from the host PC 300 is determined by a standard, it may be determined whether power is supplied from the external power supply terminal 102 side. .
[0058]
Reference numeral 105 denotes a power supply capability determination unit that determines the power supply capability when receiving power supply from the host PC via the USB interface. In this case, it is desirable that the power supply capability determination unit 105 performs an operation in a test mode in which a predetermined current flows to another device, and determines the power supply capability based on a voltage change occurring at this time. .
[0059]
106 is a high-speed interface circuit for performing high-speed data transfer in the interface, and 107 is a low-speed interface circuit for performing low-speed data transfer in the interface. The high-speed interface 106 and the low-speed interface 107 perform data transfer via a signal line from the interface terminal 103. When USB is used as a specific example, it can be said that the high-speed interface circuit 106 conforms to the USB 2.0 standard and the low-speed interface circuit 106 conforms to the USB 1.1 standard.
[0060]
Note that the high-speed interface circuit 106 performs data transfer at high speed, but has a feature of consuming more power than the low-speed interface circuit 107. On the other hand, the low-speed interface circuit 107 can perform data transfer only at a low speed, but has a feature of consuming less power than the high-speed interface circuit 106.
[0061]
Reference numeral 110 denotes a signal processing circuit that performs signal processing required when reading / writing data from / on an optical disk, and 111 denotes a cache memory that stores a certain amount of data when reading / writing.
[0062]
Reference numeral 120 denotes an optical pickup for reading / writing the optical disk using light, 121 denotes a PU control circuit for performing focus control and tracking control for causing the optical pickup 120 to access a predetermined track of the optical disk, and 122 denotes an optical pickup. 120 is a read / write circuit for reading / writing.
[0063]
Reference numeral 130 denotes a linear motor for performing a seek operation for making the optical pickup 120 track-jump to and access a desired track of the optical disk, and 131 denotes a linear motor control circuit for controlling the linear motor 130.
[0064]
140 is a spindle motor control circuit for rotating the optical disk, and 141 is a spindle motor control circuit for controlling the spindle motor 140 to rotate at a predetermined rotation speed.
[0065]
In the above configuration, the control unit 101 refers to the determination result of the power supply system determination unit 104, and when the power is supplied via the external power supply terminal 102, sets each unit in the rated power consumption mode. When the power is supplied through the interface terminal 103, the operation is controlled so that each unit operates in the low power consumption mode.
[0066]
Here, in the rated power consumption mode, regardless of the power consumption of each unit of the optical disc recording / reproducing apparatus 100, the achievable abilities (the data transfer capability of the high-speed interface circuit 106, the signal processing capability of the signal processing circuit 110, the seek speed of the optical pickup 120) The control unit 101 controls each unit so as to make maximum use of (the driving speed of the linear motor 130), the rotation speed of the spindle motor 140 for rotating the optical disk, and the operation clock of each unit.
[0067]
In the low power consumption mode, the capacity (the speed of the high-speed interface circuit 106 or the low-speed interface circuit 107) is set so that the upper limit value of the power consumption of each unit of the optical disc recording / reproducing apparatus 100 falls within the range of the power supplied by the bus power method. Data transfer capability, signal processing capability of the signal processing circuit 110, seek speed of the optical pickup 120 (drive speed of the linear motor 130), rotation speed of the spindle motor 140 for rotating the optical disk, and operation clock of each unit are controlled. Means 101 controls each unit.
[0068]
Note that it is also desirable to provide a plurality of modes with different power consumption as the low power consumption mode. For example, there are a standard / low power consumption mode (2.5 W power consumption) and a minimum / low power consumption mode (1.8 W power consumption). The control unit 101 may control the combination of the operation states of the respective units in accordance with such a plurality of modes.
[0069]
Here, the operation of this embodiment will be described with reference to FIG.
[0070]
The control unit 101 first refers to the determination result of the power supply system determination unit 104 (S1 in FIG. 2). Here, the power supply system determination unit 104 determines whether the optical disc recording / reproducing apparatus 100 is supplied with power from the interface terminal 103 or is supplied with power from the external power supply terminal 102. When power is supplied from both the interface terminal 103 and the external power terminal 102, the optical disc recording / reproducing apparatus 100 receives power from the external power terminal 102.
[0071]
When it is determined that power is supplied from the external power supply terminal 102 to the optical disk recording / reproducing apparatus 100 based on the result of the determination by the power supply system determining unit 104 (“Self power” in S1 of FIG. 2), the control unit 101 Controls the components to operate in the rated power consumption mode (S2 in FIG. 2).
[0072]
In the rated power consumption mode, the high-speed interface circuit 106 is selected for data transfer under the control of the control means 101 and the operation clock of each section is increased to maximize the ability of each section of the optical disc recording / reproducing apparatus 100. The signal processing capability of the processing circuit 110 is increased, the drive speed of the linear motor 130 is increased to increase the seek speed of the optical pickup 120, and the rotation speed of the spindle motor 140 is increased to rotate the optical disk at a high speed to read / write. Enables fast writing.
[0073]
In this case, power consumption increases due to the performance-oriented operation as described above. However, since power is supplied by an AC adapter or the like via the external power supply terminal 102, no problem regarding power supply occurs. It is desirable that an AC adapter that can supply a larger amount of power than the interface terminal 103 be connected to the external power supply terminal 102.
[0074]
On the other hand, when it is determined that the power is supplied from the host PC 300 to the optical disk recording / reproducing apparatus 100 via the interface terminal 103 based on the determination result of the power supply system determining unit 104 (“bus power” in S1 of FIG. 2). ), The control unit 101 controls each unit to operate in the low power consumption mode.
[0075]
In the present embodiment, two low power consumption modes are provided: a standard low power consumption mode (hereinafter simply referred to as a low power consumption mode) and a minimum power consumption mode further considering low power consumption. A case where a mode exists will be described.
[0076]
Here, the power supply capability determination unit 105 determines the power supply capability when receiving power supply from the host PC 300 via the USB interface (S3 in FIG. 2).
[0077]
In this case, the optical disc recording / reproducing apparatus 100 performs an operation in which the power consumption fluctuates drastically as a test mode, and the power supply capability determination unit 105 determines the power supply capability based on the ripple or voltage drop of the power supply. For example, since a large current flows through the linear motor during the seek operation of the head, the seek operation may be repeated several times, and the power supply ripple during the seek operation may be measured to determine whether or not the power supply ripple is below a predetermined value. Since a large pulse-like current flows through the laser of the optical pickup at the time of writing data, the data may be written to the test area of the disk and the fluctuation of the power supply voltage and the ripple at that time may be measured.
[0078]
Here, when it is determined that the power supply capability is normal based on the determination result of the power supply capability determination unit 105 ("normal" in S3 of FIG. 2), the control unit 101 switches to the standard low power consumption mode. Each part is controlled to operate (S4 in FIG. 2). On the other hand, when it is determined that the power supply capability is lower than normal based on the determination result of the power supply capability determination unit 105 (“lower than normal” in S3 of FIG. 2), the control unit 101 controls each unit in the lowest power consumption mode. It is controlled to operate (S5 in FIG. 2).
[0079]
In the low power consumption mode, the high-speed interface circuit 106 is selected for data transfer under the control of the control unit 101 in order to maximize the capabilities of each unit of the optical disk recording / reproducing apparatus 100 within the range of power supply of the bus power system. Although the data transfer with the host PC 300 is performed at a high speed, the operation clock of each unit is lowered to suppress the signal processing capability of the signal processing circuit 110, and the drive speed of the linear motor 130 is reduced so that the seek speed of the optical pickup 120 is reduced. In addition, the rotation speed of the spindle motor 140 is set to a low speed, and the optical disk is rotated at a low speed so that reading / writing can be performed at a low speed.
[0080]
In this case, as described above, the power consumption is reduced by the operation of tending to relatively suppress the performance of each unit, and the operation within the range of the power supply via the interface terminal 103 can be realized. Provides maximum performance operation.
[0081]
On the other hand, in the lowest power consumption mode, the control unit 101 controls the operation of each unit of the optical disk recording / reproducing apparatus 100 within the range of power supply of the bus power system and within the range of not burdening the battery of the host PC 300. Under the control, the low-speed interface circuit 107 is selected as the data transfer, the data transfer with the host PC 300 is performed at a low speed, the operation clock of each unit is reduced, the signal processing capability of the signal processing circuit 110 is suppressed, and the linear motor 130 is controlled. The drive speed of the optical pickup 120 is reduced to reduce the seek speed of the optical pickup 120, and the rotational speed of the spindle motor 140 is reduced to rotate the optical disk at a low speed so that reading / writing can be performed at a low speed.
[0082]
In this case, as described above, the power consumption is further reduced due to the operation of tending to suppress the performance of each unit as a whole, and the power supply portion of the host PC 300 is hardly burdened within the range of power supply via the interface terminal 103. The operation can be realized, and the operation with the minimum performance within the range of the power supply of the bus power system is realized. With this operation, even if the battery of the host PC 300 is weak, the operation can be performed with as little load as possible.
[0083]
It should be noted that not only two types of the normal low power consumption mode and the minimum power consumption mode, but also one type of low power consumption mode or three or more types of low power consumption modes may be provided.
[0084]
In the low power consumption mode, data transfer (selection of the high-speed interface circuit 106 / low-speed interface circuit 107), change of the frequency of the operation clock of each unit, drive speed of the linear motor 130 (seek speed of the optical pickup 120), spindle motor 140 The rotation speed (rotation speed of the optical disk) may be determined based on a balance between the power consumption reduced by the selection and the performance that is reduced.
[0085]
In the above control, in order to switch the seek speed, the voltage applied from the PU control circuit 121 to the optical pickup 120 may be changed, or the speed profile for speed control by the control unit 101 may be changed. Is also good.
[0086]
Further, in the above control, in order to switch the transfer rate, instead of providing a plurality of data transfer circuits (interface circuits) for switching, a single data transfer circuit (interface circuit) is controlled by giving a speed switching command. You may.
[0087]
By performing the combination of selections as described above, in an optical disc recording / reproducing apparatus having two types of power supply systems, a bus power system that receives power supply from another device and a self-power system that uses an external power supply, In this case, the maximum performance can be utilized within each range.
[0088]
As a result of the above, in an optical disk recording / reproducing apparatus having a bus power type power supply system receiving power supply from another device, the maximum performance is utilized within the capability of the other device being supplied. It becomes possible.
[0089]
In addition, the above-mentioned power supply system discrimination and power supply capacity judgment should be performed periodically, so that if the power supply is switched from an external power supply via an interface or from an interface to an external power supply, it can be handled immediately. Can be performed, and the maximum ability at that time can be exhibited.
[0090]
FIG. 3 is an explanatory diagram showing an operation state of another embodiment of the present invention. The optical disk recording / reproducing apparatus 100 shown in FIG. 1 is characterized by including a cache memory 111 for storing a predetermined amount of data to be written on an optical disk. In such a configuration, the control unit 101 stores data to be written in the cache memory 111 in the low power consumption mode.
[0091]
Then, the control unit 101 calculates by calculation the order in which the seek operation distance of the optical pickup 120 is minimized, and the control unit 101 writes the data read from the cache memory 111 onto the optical disk in such an order. It is characterized by performing control.
[0092]
Here, for example, assuming an optical disk in which a certain amount of data has already been written and a fragmentation has occurred, when data is written later, a vacant area is often distributed.
[0093]
The case where three data A, B, and C are written to the disk will be described. In the case of FIG. 3A, first, data A is written on the inner circumference side ((1)), and then, data B is written on the area near the outer circumference where there is a continuous free area. (2), and thereafter, the data C is written in an area inside the area (2) but dispersed, (3), (4), and (5). Here, (1) to (5) indicate the order of writing data. In this case, the control is such that the optical pickup moves from the inner peripheral side (1) to the outer peripheral side (2) and returns the optical pickup to the inner peripheral side (3) to (5) again. Therefore, the optical pickup performs a useless seek operation, and the moving distance is long. For this reason, the power consumption of each unit is increased according to the time required for the seek operation.
[0094]
Therefore, the data A to C to be written are stored in the cache memory 111, and the data A is first written to the inner circumference side ((1)) as shown in FIG. Data C is written in the dispersed area, which is an intermediate area between the inner circumference and the outer circumference ((2), (3), (4)). Finally, a continuous free area close to the outer circumference exists. The data B is written in the area where it has been (5). In this case, since the optical pickup is moved gradually from the inner side (1) to the outer side (5), useless seek operation does not occur in the optical pickup, and the moving distance is minimized. Become. Thus, the operation time is shortened, and power consumption can be reduced.
[0095]
As shown in FIG. 3B, although the order of writing has been changed, the data to be written and its position have not been changed, so there is no need to change the FAT or TOC.
[0096]
In other words, by performing writing in such an order that the seek operation distance is minimized, it becomes possible to minimize the power consumption required to write a fixed amount of data on the optical disk. As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0097]
It should be noted that since the time until data accumulates in the cache memory 111 is not constant, it is also desirable to execute writing even if the amount of data in the cache memory 111 is small when a predetermined time (several seconds to several tens of seconds) has elapsed. . Further, it may be possible to set whether or not to execute such an order change writing by a user's selection.
[0098]
Further, the USB has been described as a specific example of an interface configured to enable data transfer and power supply / reception with another device, but the present invention can be applied to another interface such as IEEE 1943.
[0099]
【The invention's effect】
As described above in detail with the embodiments, the present invention has the following effects.
[0100]
(1) In the first aspect of the invention, when data transfer and power supply / reception can be performed with another device, the control unit refers to the determination result of the power supply system determination unit, When power is supplied through an external power supply terminal, each unit operates in the rated power consumption mode, and when power is supplied through the interface, each unit operates in the low power consumption mode. Control. As a result, in an optical disc recording / reproducing apparatus in which there are two types of power supply systems, a bus power system that receives power supply from another device and a self-power system that uses an external power supply, when operating in either system. However, it is possible to utilize the maximum performance in each range.
[0101]
(2) In the invention according to claim 2, when data transfer and power supply / reception can be performed with another device, the control unit refers to the determination result of the power supply capability determination unit, If it is determined that the power supply capability has dropped below the predetermined value, control is performed so that each unit operates in a predetermined low power consumption mode according to the determination result. As a result, in an optical disc recording / reproducing device that has a bus-powered power supply system that receives power supply from another device, it is possible to utilize the maximum performance within the capability of the other device being supplied power become.
[0102]
(3) In the invention according to claim 3, when data transfer and power supply / reception are possible with another device, the control unit refers to the determination result of the power supply system determination unit, When power is supplied through an external power supply terminal, each unit operates in the rated power consumption mode, and when power is supplied through the interface, each unit operates in the low power consumption mode. Control. As a result, in an optical disc recording / reproducing apparatus in which there are two types of power supply systems, a bus power system that receives power supply from another device and a self-power system that uses an external power supply, when operating in either system. However, it is possible to utilize the maximum performance in each range. Also, the control unit refers to the determination result of the power supply capability determination unit, and when it is determined that the power supply capability is lower than a predetermined value, the control unit performs a predetermined low power consumption mode according to the determination result. Control each part to operate. As a result, in an optical disc recording / reproducing device that has a bus-powered power supply system that receives power supply from another device, it is possible to utilize the maximum performance within the capability of the other device being supplied power become.
[0103]
(4) In the invention according to claim 4, in the above (1) to (3), the control means switches the transfer speed in the data transfer via the interface between the rated power consumption mode and the low power consumption mode. Controlling. In this case, the transfer speed is switched at high speed in the rated power consumption mode, and the transfer speed is switched at high speed in the low power consumption mode. As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0104]
(5) In the invention described in claim 5, in the above (1) to (4), the control means supplies each unit in the rated power consumption mode and the low power consumption mode, or in a plurality of low power consumption modes. Control is performed to switch the frequency of the operation clock. In this case, the clock frequency is switched to the higher clock frequency in the rated power consumption mode, and the clock frequency is switched to the lower clock frequency as the power consumption mode becomes lower. As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0105]
(6) In the invention according to claim 6, in the above (1) to (5), the control means drives the optical disc to rotate in the rated power consumption mode and the low power consumption mode, or in a plurality of low power consumption modes. The rotation speed of the spindle motor is controlled to be switched. In this case, the rotation speed is switched to a higher rotation speed in the rated power consumption mode, and is switched to a lower rotation speed as the power consumption mode becomes lower. As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0106]
(7) In the invention of claim 7, in the above (1) to (6), the control means seeks the optical pickup in the rated power consumption mode and the low power consumption mode or in a plurality of low power consumption modes. Control is performed so as to switch the seek speed in the operation. In this case, the mode is switched to a high seek speed in the rated power consumption mode, and is switched to a lower seek speed as the power consumption mode becomes lower. As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[0107]
(8) In the invention according to claim 8, in any of the above (1) to (7), when a cache memory for storing a predetermined amount of data to be written to the optical disk is provided, the control means may be in the low power consumption mode. Then, the data to be written is stored in the cache memory, and the write sequence control is performed so that the data read from the cache memory is written to the optical disc in an order that minimizes the seek operation distance of the optical pickup. By performing writing in such an order that the seek operation distance is minimized, it is possible to minimize the power consumption required to write a fixed amount of data on the optical disk. As a result, it is necessary to utilize the maximum performance within the respective ranges, regardless of whether the device is operating in the bus power system that receives power supply from other devices or the self-power system that uses an external power supply. Becomes possible.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing an electrical configuration of an optical disc recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing an operation state according to the embodiment of the present invention.
FIG. 3 is an explanatory diagram for explaining an operation of the exemplary embodiment of the present invention.
FIG. 4 is an explanatory diagram for explaining connection of a bus power system.
FIG. 5 is an explanatory diagram for explaining connection of a self-power system.
[Explanation of symbols]
100 Optical disk recording and reproducing device
101 control means
102 External power supply terminal
103 Interface terminal
104 Power supply system determination means
105 Power supply capacity determination means
106 High-speed interface circuit
107 Low-speed interface circuit
110 signal processing circuit
111 cache memory
120 Optical pickup
121 PU control circuit
122 read / write circuit
130 linear motor
131 Linear motor control circuit
140 spindle motor
141 Spindle motor control circuit

Claims (8)

An optical disc recording / reproducing device including an interface configured to enable data transfer and power supply transfer between other devices,
An external power supply terminal capable of receiving a larger supply of power from an external power supply than through the interface,
Power supply system determination means for determining a system in which power is supplied;
Control means for controlling the operation state of each part,
The control unit refers to the determination result of the power supply system determination unit, and when the power supply is performed via the external power supply terminal, causes each unit to operate in a rated power consumption mode. If it is done via, control to operate each unit in the low power consumption mode,
An optical disc recording / reproducing apparatus characterized by the above-mentioned. An optical disc recording / reproducing device including an interface configured to enable data transfer and power supply transfer between other devices,
Power supply capability determining means for determining power supply capability when receiving power supply from the interface,
Control means for controlling the operation state of each part,
The control unit refers to the determination result of the power supply capability determination unit, and when it is determined that the power supply capability is lower than a predetermined value, in a predetermined low power consumption mode according to the determination result. Control each part to operate,
An optical disc recording / reproducing apparatus characterized by the above-mentioned. An optical disc recording / reproducing device including an interface configured to enable data transfer and power supply transfer between other devices,
An external power supply terminal capable of receiving a larger supply of power from an external power supply than through the interface,
Power supply system determination means for determining a system in which power is supplied;
Power supply capability determining means for determining power supply capability when receiving power supply from the interface,
Control means for controlling the operation state of each part,
The control means includes:
With reference to the determination result of the power supply system determination unit, when power supply is performed via the external power supply terminal, each unit is operated in the rated power consumption mode, and power supply is performed via the interface. If there is, control to operate each unit in the low power consumption mode, further refer to the determination result of the power supply capability determination means, if it is determined that the power supply capability has dropped below a predetermined value, Controlling each unit to operate in a predetermined low power consumption mode according to the determination result,
An optical disc recording / reproducing apparatus characterized by the above-mentioned. The control unit switches a transfer speed in data transfer via the interface between a rated power consumption mode and a low power consumption mode.
The optical disk recording / reproducing apparatus according to any one of claims 1 to 3, wherein: The control unit switches a frequency of an operation clock supplied to each unit in a rated power consumption mode and a low power consumption mode, or in a plurality of low power consumption modes,
The optical disk recording / reproducing apparatus according to any one of claims 1 to 4, wherein: The control means, in a rated power consumption mode and a low power consumption mode, or in a plurality of low power consumption mode, to switch the rotation speed of the spindle motor that drives the optical disc to rotate,
The optical disk recording / reproducing apparatus according to claim 1, wherein: The control unit switches a seek speed in a seek operation of the optical pickup in a rated power consumption mode and a low power consumption mode, or in a plurality of low power consumption modes.
7. The optical disk recording / reproducing apparatus according to claim 1, wherein: A cache memory for storing a predetermined amount of data to be written to the optical disc;
In the low power consumption mode, the control means stores data to be written in the cache memory, and reads the data read from the cache memory in the order such that the seek operation distance of the optical pickup is minimized. Perform write sequence control to write to
The optical disk recording / reproducing apparatus according to any one of claims 1 to 7, wherein:

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