JP2000014000A - Electronics - Google Patents

Abstract

(57) [Problem] To provide a sufficient voltage necessary for the operation of a plurality of parts when the power is turned on, even in an electronic device using a power supply that does not have a sufficient power supply to the plurality of parts. Thus, even if a rush current flows when the power is turned on, there is no risk of exceeding the current supply capability of the power supply, and an electronic device capable of reliably operating all of a plurality of parts constituting the electronic device is obtained. A power supply circuit includes a plurality of portions and a power supply circuit for turning on power to the plurality of portions at different timings after a power-on command.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device, and more particularly to an electronic device having a power supply circuit for turning on and off power to a plurality of parts.

[0002]

2. Description of the Related Art Power supply to a plurality of parts of a conventional electronic device has been performed almost simultaneously when the power supply is turned on.

[0003] Conventionally, the power supply to a plurality of parts of an electronic device is cut off almost simultaneously when the power supply is turned off.

[0004]

Since the power supply to a plurality of parts of the conventional electronic device is performed almost simultaneously when the power is turned on, the power supply to the plurality of parts is reduced as in the case of using a low-voltage battery. In the case of an electronic device equipped with a power supply that cannot afford enough power supply, the power supply circuit will stop functioning because the current supply capacity of the power supply will be exceeded when the power supply is turned on due to rush current. There is a possibility that a plurality of portions to which power is supplied do not operate.

When a plurality of parts of an electronic device include an electro-mechanical converter, when the power is turned on, the electro-mechanical converter is not supplied with a voltage sufficient for its operation. The driven part driven by the electro-mechanical converter is not set to the initial position for starting operation,
There was also a risk of malfunction.

Further, since the power supply to a plurality of parts of a conventional electronic device is cut off almost simultaneously when the power is turned off, if the plurality of parts of the electronic device include an electro-mechanical converter, The driven part driven by the electro-mechanical converter may not be set at the initial position at the end of the operation.

In view of the above, the present invention provides an electronic apparatus that uses a power supply that does not have a margin for supplying power to a plurality of parts, and that when the power supply is turned on, it is necessary for the operation of all the plurality of parts to be sufficient. Electronic device that can supply a high voltage and does not exceed the current supply capability of the power supply even if a rush current flows when the power is turned on, and can reliably operate all of a plurality of parts constituting the electronic device. It is intended to propose.

[0008] Further, the present invention provides a method for controlling a power supply when an electric-mechanical converter is included in a plurality of parts of an electronic device.
It is an object of the present invention to propose an electronic device that can surely set the position of a driven portion driven by the electro-mechanical converter to an initial position at the end of operation.

Further, the present invention provides an electronic apparatus that uses a power supply that does not have a margin for supplying power to a plurality of parts, and supplies a sufficient voltage necessary for all operations of the plurality of parts when the power is turned on. Even if a rush current flows when the power supply is turned on, there is no possibility that the current supply capacity of the power supply will be exceeded, and all of the plurality of parts constituting the electronic equipment can be reliably operated. Even if the electro-mechanical converter is included in a plurality of parts, when the power is turned off,
It is an object of the present invention to propose an electronic device that can surely set the position of a driven portion driven by the electro-mechanical converter to an initial position at the end of operation.

[0010]

According to a first aspect of the present invention, there is provided an electronic apparatus comprising: a plurality of parts;
And a power supply circuit for turning on the power at different timings after the N command.

According to the first aspect of the present invention, the power supply circuit turns on the power to the plurality of portions at different timings after the power ON command.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The first invention comprises a plurality of parts,
A power supply circuit for turning on the power to the plurality of parts at different timings after the power-on command.

According to a second aspect of the present invention, there is provided an electronic apparatus having a plurality of portions and a power supply circuit for shutting off power to the plurality of portions at different timings after a power-off command.

According to a third aspect of the present invention, a plurality of portions and a plurality of portions are turned on at mutually different timings after a power-on command, and the plurality of portions are powered on and off.
And a power supply circuit that shuts off the power at different timings after the FF command.

According to a fourth aspect of the present invention, in the electronic device of the first aspect, the plurality of portions are electronic devices including a circuit and an electro-mechanical converter.

According to a fifth aspect of the present invention, in the electronic device according to the second aspect of the present invention, the plurality of parts are electronic devices including a circuit and an electro-mechanical converter.

According to a sixth aspect of the present invention, in the electronic device of the third aspect, the plurality of portions are electronic devices including a circuit and an electro-mechanical converter.

According to a seventh aspect of the present invention, there is provided the electronic apparatus according to the first aspect of the present invention, wherein a battery is used as a power supply.

According to an eighth aspect of the present invention, there is provided the electronic apparatus according to the third aspect of the present invention, wherein a battery is used as a power supply.

[Specific Example of Embodiment of the Invention] Hereinafter, referring to FIG. 1, a video camera-integrated magnetic recording / reproducing apparatus as an example of an electronic apparatus according to a specific example of the embodiment of the present invention will be described in detail. Will be described. Reference numerals 1A to 1F denote a plurality of portions to which the power of the video camera-integrated magnetic recording / reproducing apparatus is supplied.

Reference numeral 1A denotes a video signal processing IC (semiconductor integrated circuit). 1B is a camera signal processing circuit.

Reference numeral 1C denotes a drive unit (plunger, motor, etc.) of the mechanical deck. On the mechanical deck,
Means for winding a capstan, a pinch roller, a magnetic tape around a tape guiding drum device (including a fixed lower drum and a rotating upper drum provided with a rotating magnetic head) and a means for releasing the winding, a tape guide, a tape reel, etc. It is installed. This mechanical deck is driven by
They are positioned at different fixed positions (initial positions) when the power is turned on and when the power is turned off.

1D is a drum drive motor. This drum drive motor is a motor that drives the upper drum of the tape guide drum device described above.

Reference numeral 1E denotes a camera lens (zoom lens) drive motor. This zoom lens is positioned at different fixed positions (initial positions) when the power is turned on and when the power is turned off by the drive motor.

1F is a liquid crystal display (color video monitor)
It is. The liquid crystal display device includes a liquid crystal display, a driving circuit of the liquid crystal display, a light source for a backlight, and the like.

Reference numeral 2 denotes a main power supply circuit which supplies power to the plurality of portions 1A to 1F of the video camera-integrated magnetic recording / reproducing apparatus at different timings with a predetermined power supply voltage and at different timings. This is a power supply circuit that shuts off. A to F of the main power supply circuit 2
Are power supply voltage output terminals for the plurality of portions 1A to 1F.

The main power supply circuit 2 has a power supply (primary battery,
A power supply voltage is supplied from a secondary battery 7), and based on the power supply voltage, under the control of the microcomputer 4, a predetermined DC voltage applied to each of the plurality of portions 1A to 1F,
It is generated from the power supply voltage output terminals A to F.

Reference numeral 5 denotes another microcomputer, which communicates with the above-described microcomputer 4 through a communication path 6 and controls each other. The microcomputer 5 supplies a control signal to the plurality of parts 1A to 1F to control the plurality of parts 1A to 1F individually. Although not shown, the microcomputer 5 is connected to an operation device (such as a keyboard) having a plurality of operation units for controlling each unit of the video camera-integrated magnetic recording / reproducing apparatus.

The sub power supply circuit 3 generates an optimum DC voltage for the microcomputers 4 and 5 based on the power supply voltage from the power supply 7, and the DC voltage is
5 is supplied.

Note that one microcomputer may be provided instead of the separate microcomputers 4 and 5.

The output terminal of the sub power supply circuit 3 is connected to one end of a power switch 8 through a resistor 9, and the other end of the power switch 8 is grounded. Then, at the midpoint of connection between the resistor 9 and the power switch 8, the power ON, the power ON based on the temporary ON operation of the power switch 8 which is always OFF.
An OFF detection signal is supplied to the microcomputer 4. The ON / OFF detection signal of the power supply is also transmitted from the microcomputer 4 to the microcomputer 5.

Next, with reference to FIGS. 2 and 3, the operation of turning on and off the power to the plurality of portions 1A to 1F will be described. As shown in FIG. 3A, at time t0, the power switch 8 is temporarily turned on, and a power ON command is issued.
Thereafter, at time T0, the power switch 8 is temporarily turned on, and a power-off command is issued.

First, the operation when the power is turned on in FIG. 2A will be described. In step ST-1, it is determined whether or not a power ON command has been issued. If NO, the process returns to step ST-1.
If YES, assuming that the power ON command has been issued at time t0 as shown in FIG.
Move to

In step ST-2, after the time point t0, the main power supply circuit 2 turns on the power to the video signal processing IC 1A after the time point t1 as shown in FIG.
Thereafter, the process proceeds to step ST-3.

In step ST-3, after the time point t1, the main power supply circuit 2 turns on the power to the drum driving motor 1D after the time point t2 as shown in FIG. Is started, step ST-
Move to 4.

In step ST-4, after the time point t2, the main power supply circuit 2 turns on the power to the drive unit 1C of the mechanical deck after the time point t3 as shown in FIG. Is set to the initial position when the power is turned on, and the process proceeds to step ST-5.

In step ST-5, after the time point t3, the main power supply circuit 2 turns on the power to the camera signal processing IC 1B after the time point t4 as shown in FIG. Move to

In step ST-6, after the time point t4, the main power supply circuit 2 turns on the power to the camera zoom lens driving motor 1E after the time point t5 as shown in FIG. After setting the lens position to the initial position when the power is turned on, the process proceeds to step ST-7.

In step ST-7, after the time point t5, the main power supply circuit 2 turns on the power to the liquid crystal display device 1F after the time point t6 as shown in FIG.

Next, the operation when the power is turned off will be described. In step ST-1, it is determined whether or not a power-off command has been issued. If NO, the process returns to step ST-1 and YES
At time ｛, as shown in FIG. 3A, the power is turned off at time T0.
When it is assumed that the command has been issued, the process proceeds to step ST-2.

In step ST-2, after the time point T0, as shown in FIG. 3 (g), the power supply to the liquid crystal display device 1F is cut off by the main power supply circuit 2 after the time point T1. After the power supplied to the liquid crystal display device 1F is cut off after the time point T1, a step ST-
Move to 3.

In step ST-3, after the time point T1, as shown in FIG. 3 (f), the power supply to the camera zoom lens driving motor 1E is cut off by the main power supply circuit 2 after the time point T2. The power supplied from the circuit 2 to the camera zoom lens driving motor 1D is cut off after time T2, and the position of the camera zoom lens is set to the initial position at the time of power cut off. Then, the process proceeds to step ST-4.

In step ST-4, after the time point T2, as shown in FIG. 3E, the power supply to the camera signal processing IC 1B is cut off by the main power supply circuit 2 after the time point T3.
That is, the power supplied from the main power supply circuit 2 to the camera signal processing IC 1B is cut off after the time point T3, and the process proceeds to step ST-5.

In step ST-5, after the time point T3, as shown in FIG. 3D, after the time point T4, the main power supply circuit 2 shuts off the power to the drive unit 1C of the mechanical deck. The power supplied from the circuit 2 to the drive unit 1C of the mechanical deck is shut off after time T4, and the position of the mechanical deck is set to the initial position at the time of power shutdown, and then the process proceeds to step ST-6.

In step ST-6, after the time point T4, the power supply to the drum drive motor 1D is cut off by the main power supply circuit 2 after the time point T5, that is, the drum drive motor 1D is supplied from the main power supply circuit 2 to the drum drive motor 1D. After turning off the power supply after time T5, the process proceeds to step ST-7.

In step ST-7, after the time point T5, the video signal processing I is performed by the main power supply circuit 2 after the time point T6.
The power supply to the video signal processing IC 1A from the main power supply circuit 2 is cut off at time T1.
It shuts off after 6 and ends.

The electronic apparatus according to the embodiment of the present invention includes:
Not limited to the above-described video camera-integrated magnetic recording / reproducing device,
Various electronic devices such as an optical disk reproducing device, a magneto-optical recording and reproducing device, a tape recorder, a television receiver, a radio receiver, and a video camera device are possible.

The power supply is not limited to a battery, but may be an AC adapter or the like that converts a commercial AC voltage to a DC voltage lower than the voltage.

[0049]

According to the first aspect of the present invention, a plurality of parts,
A power supply circuit is provided for turning on the power to the plurality of portions at mutually different timings after the power ON command.
Even in an electronic device that uses a power supply that does not have enough power to supply power to a plurality of parts, a sufficient voltage necessary for all the operations of the plurality of parts can be given when the power is turned on. Even if the rush current flows, there is no risk of exceeding the current supply capability of the power supply, and it is possible to obtain an electronic device capable of reliably operating all of the plurality of parts constituting the electronic device.

According to the second aspect of the present invention, since there are provided a plurality of portions and a power supply circuit for shutting off the power to the plurality of portions at different timings after the power-off command,
Even if a plurality of parts of an electronic device include an electro-mechanical converter, when the power is turned off, the position of a driven part driven by the electro-mechanical converter is reliably set to the initial position at the end of operation. An electronic device that can perform the operation can be obtained.

According to the third aspect of the present invention, the plurality of parts and the plurality of parts are turned on at different timings after the power-on command, and the plurality of parts are turned on.
Since there is a power supply circuit that shuts off the power at different timings after the power-off command, even if the electronic device uses a power supply that does not have a margin for power supply to a plurality of parts, the plurality of parts are turned off when the power is turned on. Can supply a sufficient voltage necessary for the entire operation of the power supply. Even if a rush current flows when the power supply is turned on, there is no danger that the current supply capacity of the power supply will be exceeded. In addition, even if a plurality of parts of the electronic device include the electro-mechanical converter, when the power is turned off, the position of the driven part driven by the electro-mechanical converter, An electronic device that can be reliably set to the initial position at the end of the operation can be obtained.

According to the fourth aspect of the present invention, in the electronic device according to the first aspect of the present invention, since the plurality of parts include a circuit and an electro-mechanical converter, in addition to the effects of the first aspect of the present invention, −
Even if a mechanical converter is included, a driven part driven by the electro-mechanical converter is reliably set at an initial position for starting operation, and an electronic device that does not cause a malfunction can be obtained. it can.

According to the fifth aspect of the present invention, in the electronic device according to the second aspect of the present invention, since the plurality of parts include a circuit and an electro-mechanical converter, in addition to the effects of the second aspect of the present invention, O
It is possible to obtain an electronic device that can surely set the driven portion driven by the electro-mechanical converter at the initial position at the end of the operation at the time of FF. Electronic devices can be obtained.

According to the sixth aspect of the present invention, in the electronic device according to the third aspect of the present invention, since the plurality of parts include a circuit and an electro-mechanical converter, in addition to the effects of the third aspect of the present invention, Even if multiple parts of the equipment include electro-mechanical converters,
When the power is turned off, the driven part driven by the electro-mechanical converter is securely set to the initial position at the end of the operation,
It is possible to obtain an electronic device that does not cause a malfunction.

According to the seventh aspect of the present invention, in the electronic device according to the first aspect of the present invention, a battery is used as a power source.
The same effect as the effect of the present invention can be obtained, and an electronic device that can reduce the voltage and capacity of the battery can be obtained.

According to the eighth aspect of the present invention, in the electronic device of the third aspect of the present invention, a battery is used as a power source.
The same effect as that of the present invention can be obtained, and an electronic device capable of reducing the voltage and capacity of the battery can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a video camera-integrated magnetic recording / reproducing apparatus according to a specific example of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining a power-on and power-off sequence for a plurality of parts of the video camera-integrated magnetic recording / reproducing apparatus of FIG. 1;

FIG. 3 is a timing chart for explaining a power-on and power-off sequence for a plurality of portions of the video camera-integrated magnetic recording / reproducing apparatus of FIG. 1;

[Explanation of symbols]

1A Video signal processing IC, 1B Camera signal processing I
C, 1C Drive unit of mechanical deck, 1D drum drive motor, 1E Camera zoom lens drive motor, 1F
Liquid crystal display device, 2 main power supply circuit, 3 sub power supply circuit,
4, 5 microcomputer, 6 communication path, 7 power supply (battery), 8 power switch, 9 resistor.

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Kazunori Takagi 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo In-house Sony Corporation (72) Inventor Masaaki Kojima 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Stock Company In-house F-term (reference) 5G065 BA00 BA02 BA04 DA07 EA02 FA02 FA05 GA06 GA07 JA07 KA02 KA05 LA07 MA07 MA10

Claims (8)

[Claims] 1. An electronic apparatus comprising: a plurality of portions; and a power supply circuit for turning on the power to the plurality of portions at different timings after a power-on command. 2. An electronic apparatus, comprising: a plurality of portions; and a power supply circuit for shutting off power to the plurality of portions at mutually different timings after a power-off command. 3. A plurality of parts, and a plurality of parts are turned on at different timings after a power-on command, and the plurality of parts are turned off at different timings after a power-off command. And a power supply circuit for performing the following. 4. The electronic device according to claim 1, wherein the plurality of parts include a circuit and an electro-mechanical converter. 5. The electronic device according to claim 2, wherein the plurality of parts include a circuit and an electro-mechanical converter. 6. The electronic device according to claim 3, wherein the plurality of parts include a circuit and an electro-mechanical converter. 7. The electronic device according to claim 1, wherein a battery is used as a power supply. 8. The electronic device according to claim 3, wherein a battery is used as a power supply.