JPH09205735A - Power control equipment for household electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide power control equipment for household electronic equipment which can prevent household electronic equipment from becoming an overload to a power source and can improve the reliability and usefulness of the equipment by eliminating the occurrence of such a trouble as the performance deterioration of a power source, remarkable shortening of driving time, etc., by providing a mechanism which gives information on the kind of the power source and using state of a load and suppressing the use of the load based on the information. SOLUTION: A power control equipment for household electronic equipment first discriminates the kind of the power source to household electronic equipment, whether an Ni-Cd battery 12, dry cell 13, or AC adapter 14, and inputs the discriminated result to a microcomputer 1. The microcomputer 1 then fetches the turned-on/off state of a DC write switch 3 from DC write information and the state of an LCD panel from opening/closing information so as to recognize a load side. In this way, control equipment controls different kinds of household electronic equipment so that the electronic equipment cannot become an overload to the power source by differently combining the equipment based on the kind of the power source and recognized information. Therefore, the performance deterioration of the power source can be prevented and appropriate driving time can be secured, and then, the reliability and usefulness of the electronic equipment can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power control device for household electronic devices.

[0002]

2. Description of the Related Art A conventional device is a CCD-T manufactured by Sony Corporation.
As described in P13 of the RV70 instruction manual,
There has been a method of extending the battery life by closing the LCD panel, but there is no method that considers not only the battery life by controlling the consumption current depending on the type of power supply, but also the problems in protection and set operation. .

[0003]

In the prior art, the setting of the load current for the power supply is controlled only by artificially switching the load power on and off, and the appropriateness of the setting for the load current limit value of the power supply is uncertain. Have enough elements. As a result, the load current limit value of the power supply is exceeded, and there is a great risk of causing performance deterioration of the power supply, a drastic decrease in drive time, or inability to drive due to overload. .

An object of the present invention is to provide a means capable of automatically setting a load current automatically without manually controlling the consumption current of the load.

[0005]

In order to achieve the above-mentioned object, a mechanism for informing household electronic equipment of information on the type of power supply and the usage status of load is provided, and based on the information,
This is made possible by adopting a system that suppresses the use of loads.

By adopting the above-mentioned means, the power supply is not overloaded, the performance deterioration of the power supply, the drastic reduction of the driving time, the inability to drive, and the like are eliminated, and the reliability and It is possible to improve usability.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below by taking a VTR integrated camera as an example. The power source mounted on the VTR integrated camera is generally Ni, which is frequently used outdoors.
-Cd batteries, AC adapters for indoor use, and recently dry batteries are one of them. What can be said in common to any of the power supplies is that if it does not have the ability to supply a sufficient drive current to the load in the active state, not only will it not be possible to obtain sufficient performance for that load, but also the performance deterioration of the power supply itself, In addition, the driving becomes impossible due to overload. In order to solve this, it is necessary to control the current consumption of the VTR integrated camera that is a load and its attached circuit depending on the type of power supply, but if you try to artificially do this work However, it imposes a heavy burden on the user and reduces usability. Therefore, the power supply system according to the present invention becomes effective. FIG. 1 is a system diagram of a power supply system according to the present invention. 1 is a microcomputer, 2
Is the DC light of the attached circuit, 3 is the switch of the DC light,
Reference numeral 4 is a DC light power supply circuit, 5 is a DC light control signal, 6 is DC light switch on / off information, and 7 is L.
CD panel, 8 is a switch which is turned on / off in conjunction with opening and closing of the LCD panel 7, 9 is a power circuit of the LCD panel, 1
0 is a control signal for the LCD panel, 11 is opening / closing information of the LCD panel, 12 is a Ni-Cd battery, 13 is a dry battery, 1
4 is an AC adapter, 15 is a DC jack for connecting the AC adapter, 16 is a dry battery detection circuit, and 17 is an AC adapter detection circuit. First, the method of determining the type of power supply will be described. The method of determining the Ni-Cd battery 12 and the dry battery 13 is that after the intermediate potential of the dry battery 13 is added to the dry battery detection circuit 16 and converted to a signal level that the microcomputer 1 can recognize, the microcomputer 1 It is done by taking in. Next, the AC adapter 14 is discriminated by connecting the common GND of the Ni-Cd battery 12 and the dry battery 13 to the movable terminal of the DC jack 15, and when the AC adapter 14 is not connected, the input to the AC adapter detection circuit 17 is not performed. Whether the power supply is the AC adapter 14 or not, by using the GND potential and the fact that the input to the AC adapter detection circuit 17 is an open potential when the AC adapter 14 is connected. Is input to the microcomputer 1.
Next, regarding the recognition on the load side, DC light 2 and DC
A DC light switch 3 is provided between the light power supply circuits 4, and the on / off state of the DC light switch 3 is DC.
It is taken into the microcomputer 1 by the write information 6. LCD
A switch 8 is provided between the panel 7 and the power supply circuit 9 of the LCD panel to turn on / off in association with the opening / closing of the LCD panel 7. When the LCD panel 7 is open, that is, the LCD panel 7 operates. When the LCD panel 7 is closed and the LCD panel 7 is closed, that is, when the LCD panel 7 is not operating, binary data is fetched into the microcomputer 1 by the opening / closing information 11. In the actual operation, based on the above-mentioned recognition information of the power supply and the load, control is performed so that the power supply is not overloaded by each combination.

A specific example of this control will be described below.
The load that can drive the C adapter 14 and the Ni-Cd battery 12 is set as the main body and the LCD panel 7 or the DC light 2
, And the load that can drive the dry battery 13 is determined to be the set body and the DC light 2. Here, when the power supply is the dry battery 13, the dry battery detection circuit 16 sends Hi level information to the microcomputer 1 as described above. The microcomputer 1 that has received the information sets the load other than the DC light 2, that is, the LCD panel 7 to the non-operation,
The control signal 10 for the CD panel is set to Lo level, and the power supply circuit 9 of the LCD panel is deactivated. Next, the power supply is Ni
In the case of the Cd battery 12, since the dry battery 13 is not connected, the information from the dry battery detection circuit 16 is the Lo level,
Further, since the AC adapter 14 is not connected, the information from the AC adapter detection circuit 17 also becomes Lo level. That is, the microcomputer 1 receives the above two pieces of information and the power supply is N
It recognizes that it is the i-Cd battery 12. The microcomputer 1 compares the on / off information 6 of the DC light switch with the opening / closing information 11 of the LCD panel, and when the LCD panel 7 is open, that is, when the opening / closing information 11 of the LCD panel is at the Hi level, it is a DC light control signal. Set 5 to Lo level and DC
The light 2 is controlled so that it cannot be driven. Next, when the LCD panel 7 is closed, that is, the LCD panel opening / closing information 1
When 1 is at Lo level, the DC write control signal 5 is set to Hi level to enable driving of the DC write 2. DC light 2
The same operation is performed even when is operating before the LCD panel 7. Next, when the AC adapter 14 is connected, A
The information of the C adapter detection circuit 17 becomes Hi level, and the microcomputer 1 recognizes that the power supply is the AC adapter 14. In this example, since the operating conditions of the Ni-Cd battery 12 and the AC adapter 14 are the same, the control for the load is as described above. As described above, if the control conditions are determined in advance in the microcomputer 1 as described above, any control can be performed. The above is one embodiment of the present invention.

[0009]

According to the present invention, since the VTR-integrated camera automatically adjusts the load current to the power supply to a proper value, the performance deterioration of the power supply is prevented, the proper driving time is ensured, and the overcurrent is maintained. It is possible to improve the effect of preventing the drive from being impossible due to the load, and it is possible to improve reliability and usability.

[Brief description of drawings]

FIG. 1 is a block diagram of a power supply system of a VTR integrated camera according to the present invention.

[Explanation of symbols]

1 ... Microcomputer, 2 ... DC light, 3 ... DC light switch, 4 ... DC light power supply circuit, 7 ... LCD panel,
8 ... LCD panel open / close switch, 9 ... LCD panel power supply circuit, 12 ... Ni-Cd battery, 13 ... Dry battery, 1
4 ... AC adapter, 15 ... DC jack, 16 ... Dry battery detection circuit, 17 ... AC adapter detection circuit.

Claims (1)

[Claims] 1. A power control device for a domestic electronic device, comprising means for controlling the current consumption of each circuit as a load according to the type of power supply of the household electronic device.